CN102412483A - Single-phase universal power supply plug - Google Patents

Abstract

The invention relates to a single-phase universal power plug, which comprises an insulating base, a three-leg pin hole, a two-leg pin hole, a ground pin groove, a conductive electrode, a conductive pin, a ground pin, and a fitting surface of a socket. The insulating base provides support for each component, and is installed in different pin holes on the socket fitting surface of the insulating base through conductive pins. The positioning of the ground pins forms a three-pin plug or a two-pin plug, thereby realizing the universality of the plug. The tripod pin holes, the two-leg pin holes, and the anchor pin grooves cannot communicate with each other. When the plug is converted between the two-pin plug and the three-pin plug, the structure is simple and reliable, and the use is convenient; the plug is easy to produce without using complex equipment, which can save costs and improve efficiency.

Description

A single-phase universal power plug

technical field

The invention relates to the field of household electrical appliances, in particular to a single-phase universal power supply plug.

Background technique

In order to prevent electric leakage accidents, many daily electrical equipment adopt single-phase power plugs (i.e. three-pin plugs) with two poles grounded, which can only be used with three-hole sockets. However, in real life, there are often situations where there are only two sockets around, so these devices cannot be used. And in these cases, people's needs for using equipment are often far greater than the needs for preventing leakage. For this reason, people wish to change the structure of existing three-pin plug, make it both supporting use with three-hole socket, can be supporting use with two-hole socket again.

Invention patent 87105007.2 discloses a universal power plug. This kind of universal power plug uses a pair of detachable and recombinable cylindrical bodies to form the pin of the plug, and there is no radial connection or only elastic connection between the parts of the plug handle that cover the pin. , so that the plug can be matched with sockets of various hole shapes and numbers of holes; using this method, different plug handles need to be designed, and when the socket is wide, it is not easy to realize the conversion from a three-pin plug to a two-pin plug.

Invention patent 92101021.4 shows a combined power plug. The plug includes an insulating plug box, a plug plate, a plug, and a bracket composed of a slotted plug hole, an elastic washer and a washer for placing the plug and adjusting the relative axis line of the plug. The position and angle device; the pin can translate and rotate in the grooved pin hole, and can be hidden in the cavity on the insulating body; the adjustment of the position of the pin in the plug is not convenient for precise control, and the relative position between the pins after adjustment and The national standard does not match; according to the national standard, the protruding length of the bolt is different in the three-pin plug and the two-pin plug, which is not reflected in this invention.

The universal power plug proposed in the invention patent 93118308.1, the plug is composed of a base, wiring and a plug mechanism, the plug is fixed with a contact piece, connected to the base through a pair of shrapnel, and can be translated, rotated and positioned in it. Remove it from the base; the plug structure designed by this scheme is relatively complicated, and the plug assembly is relatively inconvenient.

Invention patent 200610054370.9 describes a power plug. The positive and negative pins of this plug are rotatably installed in the two round holes under the base, which can meet the sockets of different specifications such as straight plug and oblique plug; In the round hole with a rectangular groove under the bolt installation base, the bottom end is connected with a pivot pin, which is just accommodated in the rectangular groove after being turned 90 degrees around the pivot pin, and can be used on a plug board with only two holes. However, this invention is not applicable to the case where the distance between the centerlines of the conductive pins in the three-pin plug and the two-pin plug is not equal, and after the ground pole pin is accommodated in the rectangular slot, it is located between the conductive pins, because the electromagnetic field changes generated by it may interfere. normal flow of electricity.

Contents of the invention

In order to overcome the disadvantages in the prior art that the plug handle is not universal, the position adjustment of the plug does not conform to the national standard, the plug structure is complicated and inconvenient to assemble, and the pin accommodation of the ground wire will affect the normal current flow, the present invention proposes a single-phase universal power supply plug.

The technical solution adopted by the present invention to solve its technical problems: including an insulating base, anchor pins, two two pin pins, two three pin pins, wires, five conductive electrodes, two conductive pins, anchor pins and the fitting surface of the socket, by installing the conductive pins in the three-pin pin holes or the two-pin pin holes, and making the ground pins vertical or parallel to the fitting surface of the socket, the versatility of the power plug is realized.

The socket bonding surface of the insulating base is provided with anchor pin grooves, two-leg pin holes, and three-leg pin holes, and two three-leg pin holes and two two-leg pin holes are symmetrically distributed on both sides of the anchor pin grooves. The two-leg pin holes are located between the three-leg pin holes and the anchor pin grooves, and the three-leg pin holes, the two-leg pin holes, and the anchor pin grooves cannot communicate with each other; the center plane of the anchor pin grooves is perpendicular to the mating surface of the socket, and The axis of symmetry of the mating surface of the socket coincides; the cross-section of the three-legged pin hole and the two-legged pin hole is rectangular, and the cross-section of the anchor pin groove is also rectangular, and the depth of the groove is the same as the width of the anchor pin, and the width of the groove is the same The thickness of the foot pins is the same; the length direction of the foot pin groove is along the direction of the symmetry axis of the fitting surface of the socket, and runs through the side where the upper edge of the insulating base is adjacent to the outer edge of the fitting surface of the socket, so that the foot pins can wrap around the positioning pins of the feet Rotate 90 degrees. The conductive pin is installed in the three-pin pin hole or the two-pin pin hole, and cooperates with the ground pin to form a three-pin plug or a two-pin plug. The ground pin slots are used to install the plug ground pins. After being installed on the insulating base, when the ground pin is perpendicular to the fitting surface of the socket, the ground pin and the ground pin groove are fitted to the wall surface perpendicular to the symmetry axis of the fitting surface of the socket.

The side adjacent to the bonding surface of the insulating base and the socket is provided with a pin positioning pin hole, a pair of two-pin positioning pin holes and a pair of three-pin positioning pin holes, which are respectively used to install the ground pin positioning pin, the two-pin positioning pin and the three-pin positioning pin hole. Locating pins. The aperture of the positioning pin hole is smaller than the width of the plug pin. When the ground pin is installed in the ground pin groove on the plug, the hole axis of the ground pin hole coincides with the axis of the ground pin hole on the ground pin. The positioning pin holes of the anchor need to penetrate the wide walls on both sides of the anchor pin groove, and the depth is not strictly limited.

The conductive pin is a flat cuboid with arc-shaped ends, one end of which is provided with a conductive pin positioning hole, and the conductive pin is installed in a tripod pin hole or a two-pin pin hole, and cooperates with the ground pin to form a three-pin plug or a two-pin plug. When the conductive pin is installed in the two-pin pin hole on the plug, the hole axis of the two-pin positioning pin hole coincides with the axis of the conductive pin positioning hole on the conductive pin. The two-leg positioning pin holes need to go through the walls of the two-leg pin holes. When the conductive pin is installed in the tripod pin hole on the plug, the hole axis of the tripod positioning pin hole coincides with the axis of the conductive pin positioning hole on the conductive pin. The tripod positioning pin hole needs to go through the wall of the tripod pin hole.

Anchor pin, two pin locating pins and three pin locating pins are insulators, and its axle diameter is respectively with anchor pin hole, and two pin locating pin holes and tripod pin hole are identical, and length is slightly greater than the depth of corresponding locating pin hole. Anchor pins, two-pin locating pins and three-pin locating pins are closely matched with the anchor pin holes, two-pin locating pin holes and three-pin locating pin holes to prevent the locating pins from coming off.

One end of the conductive electrode is fixed in the insulating base and connected to the wire. An electrode slot is opened on the upper part of the other end of the conductive electrode. A semicircular electrode guide hole is arranged at the center of the upper part of the two side walls of the electrode slot. The groove is used to install the conductive pin or the anchor pin, and the bottom surface of the groove is in contact with one end of the bolt. The length of the electrode slot is the same as the width of the plug, the width is the same as the thickness of the plug, and the depth is half of the width of the plug. When installed on an insulating base, the two wide walls of each electrode slot are flush with the wide walls of the corresponding pin hole, the electrode slot is located directly behind the corresponding pin hole/slot on the base, and the long side of the slot is in line with the hole The long side of the /slot coincides with the short side of the slot and the short side of the hole/slot. The electrode guide hole is a semicircular hole, the axis of the hole is located at the center of the top surface of the electrode slot, and is perpendicular to the wide wall of the slot, and the hole diameter is the same as the corresponding positioning pin hole. The width of the conductive electrode is the same as that of the plug pin, and the thickness is 1-2mm greater than that of the plug pin.

The wide surface of one end of the conductive pin and the grounding pin inserted into the insulating base is respectively provided with a conductive pin positioning hole and an anchor positioning hole. During installation, the two-pin positioning pin or the three-pin positioning pin can be inserted into the conductive pin positioning hole, and the ground pin positioning pin can be inserted into the ground pin positioning hole. During installation, after the two-leg positioning pin or the three-leg positioning pin is inserted into the conductive pin positioning hole, the conductive pin can be prevented from falling off; after the anchor positioning pin is inserted into the anchor positioning hole, it can prevent the anchor pin from falling off on the one hand, The pin is rotatable about it.

If the plug is used as a three-pin plug, the steps to convert it to a two-pin plug are as follows:

1. Rotate the anchor pin 90 degrees around the anchor pin, so that the anchor pin is parallel to the fitting surface of the socket of the insulating base;

2. Pull out the two tripod positioning pins, pull out the conductive pin from the tripod pin hole, and then reinstall the two tripod positioning pins;

3. Pull out the two two-pin positioning pins, put the extracted conductive pins into the two-pin pin holes, and then reinstall the two two-pin positioning pins to complete the conversion from the three-pin plug to the two-pin plug.

If the plug is used as a two-pin plug, the steps to convert it to a three-pin plug are as follows:

1. Rotate the anchor pin 90 degrees around the anchor pin, so that the anchor pin is perpendicular to the socket fitting surface of the insulating base, forming the grounding pole of the three-pin plug;

2. Pull out the two two-legged positioning pins, pull out the conductive pin from the two-legged pin holes, and then reinstall the two two-legged positioning pins;

3. Pull out the two three-pin positioning pins, put the extracted conductive pins into the three-pin pin holes, and then reinstall the two three-pin positioning pins to complete the conversion from the two-pin plug to the three-pin plug.

In the present invention, the conductive pin is inserted into different pin holes and the ground pin rotates around the positioning pin, and the positioning pin is used to realize the positioning of the conductive pin and the ground pin to form a three-pin plug or a two-pin plug, thereby realizing the universality of the plug. When the plug is converted between the two-pin plug and the three-pin plug, it is simple, reliable, and convenient to use; in addition, the production of the plug does not need to use a complicated structure, which can save costs and improve efficiency.

Description of drawings

A single-phase universal power plug of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of a three-pin power plug of the present invention.

Fig. 2 is a structural view of the insulating base assembly of the present invention.

Figure 3 is a side view of the insulating base assembly of the present invention.

Fig. 4 is a schematic diagram of the A-direction of the insulating base assembly of the present invention.

Fig. 5 is a schematic diagram of the structure of the conductive electrode.

Fig. 6 is a schematic diagram of the two-pin form of the three-pin power plug of the present invention.

Figure 7 is a structural diagram of the conductive pin.

Figure 8 is a structural diagram of the anchor pin.

In the picture:

1. Insulation base 2. Locating pin for ground feet 3. Locating pin for two legs 4. Locating pin for three legs 5. Wire 6. Pin hole for three legs 7. Pin hole for two legs 8. Pin slot for ground pin 9. Conductive electrode 10. Electrode socket Groove 11. Electrode Guide Hole 12. Conductive Pin 13. Ground Pin 14. Conductive Pin Positioning Hole 15. Ground Positioning Hole 16. Ground Positioning Pin Hole 17. Two-Pin Positioning Pin Hole 18. Three-Pin Positioning Pin Hole 19. Socket Fitting surface

Detailed ways

In the present invention, the conductive pin 12 is installed in the tripod pin hole 6 or the two-pin pin hole 7, and the ground pin 13 is perpendicular or parallel to the socket bonding surface 19 to form a triangular plug or a two-pin plug, thereby achieving versatility .

Embodiment one

In this implementation example, the universal power plug can be used on the daily three-hole socket. As shown in Figure 1 and Figure 4, the plug includes an insulating base 1, a ground positioning pin 2, a pair of two-leg positioning pins 3, a pair of three-leg positioning pins 4, a wire 5, five conductive electrodes 9, a pair of Conductive pin 12 and a ground pin 13.

As shown in Figure 2 and Figure 3, a pair of tripod pin holes 6, a pair of two-leg pin holes 7 and a ground pin groove 8 are provided on the socket bonding surface 19 in the insulating base 1, and the conductive pin 12 is installed on the tripod pin. In the hole 6, the anchor pin 13 is installed in the anchor pin groove 8 and is perpendicular to the socket fitting surface 19, and a three-pin plug is formed after being installed in this way. Do not install any latch in the two pin holes 7. The pin holes 6 and 7 are symmetrically distributed on both sides of the anchor pin slot 8 , and the center plane of the anchor pin slot 8 is perpendicular to the socket fitting surface 19 and coincides with the symmetrical axis of the socket fitting surface 19 . The relative position of the tripod pin hole 6 and the ground pin groove 8 needs to be installed on the insulating base. The relative position of 12 complies with the regulation of the national standard to the three-pin plug. The relative positions of the two holes in the two-pin pin hole 7 meet the requirements of the national standard for the two-pin plug. The two pin holes 7 are located between the tripod pin hole 6 and the ground pin groove 8, and the pin holes 6, 7 and the ground pin groove 8 cannot communicate with each other. The cross-sections of the pin holes 6 and 7 are all rectangular, and the width and length of the holes meet the requirements of the national standard for pin holes. The cross-section of the anchor pin groove 8 is also rectangular, the depth of the groove 8 is the same as the width of the anchor pin 13, and the width of the groove 8 is the same as the thickness of the anchor pin 13; the length direction of the groove 8 is along the axis of symmetry of the socket fitting surface 19 , and through the side of the insulating base 1 adjacent to the socket bonding surface 19, the anchor pin 13 can be rotated 90 degrees around the anchor pin 2. After being installed on the insulating base, when the ground pin 13 is perpendicular to the socket fitting surface 19, the ground pin 13 is fitted to the wall surface perpendicular to the symmetry axis of the socket fitting surface 19 in the ground pin groove 8.

As shown in Fig. 4, there is an anchor pin hole 16, a pair of two-pin pin holes 17 and a pair of three-pin pin holes 18 on the side adjacent to the socket bonding surface 19 in the insulating base 1, respectively for Install the foot positioning pin 2, the two-leg positioning pin 3 and the tripod positioning pin 4. The apertures of the positioning pin holes 16, 17 and 18 are smaller than the width of the plug pins, and the specific size is not strictly limited. When the ground pin 13 was installed in the ground pin slot 8 on the plug, the axis of the ground pin hole 16 coincided with the axis of the ground pin hole 15 on the ground pin 13 . The positioning pin hole 16 needs to penetrate the two wide walls of the anchor pin groove 8, and the depth is not strictly limited. When the conductive pin 12 is installed in the tripod pin hole 6 on the plug, the axis of the tripod positioning pin hole 18 coincides with the axis of the conductive pin positioning hole 14 on the conductive pin 12 . The positioning pin hole 18 needs to run through the two wide walls of the tripod pin hole 6, and the depth is not strictly limited.

Anchor pin 2, two-pin locating pin 3 and three-pin locating pin 4 are insulators. The depth of the pin hole. When alignment pin 2,3,4 cooperates with corresponding alignment pin hole 16,17,18, certain cooperating force is produced, to prevent alignment pin from coming off.

As shown in FIG. 5 , one end of the conductive electrode 9 is fixed on the inner surface of the insulating base 1 opposite to the socket fitting surface 19 , and is connected to the corresponding wire 5 . The other end of the conductive electrode 9 is provided with an electrode slot 10 and an electrode guide hole 11 . The electrode socket 10 is used for installing the conductive pin 12 or the ground pin 13, and the bottom surface of the groove is in contact with one end of the plug pin. The length of the electrode slot 10 is the same as the width of the plug, the width is the same as the thickness of the plug, and the depth is half of the width of the plug. When installed on the insulating base 1, the two wide walls of each electrode socket 10 are flush with the wide walls of the pin holes 6, 7, and viewed from the front of the socket fitting surface 19 on the base 1 to the other side , the electrode slot 10 is located directly behind the pin holes 6 and 7 on the base 1 and the anchor pin slot 8, and the long side of the slot 10 coincides with the long sides of the holes 6 and 7 and the slot 8, and the short side of the slot 10 coincides with the long side of the slot 8 The short sides of 6 and 7 and groove 8 coincide, as shown in Figure 3. The electrode guide hole 11 is a semicircular hole, the axis of the hole is located at the center of the top surface of the electrode socket 10, and is perpendicular to the wide wall surface of the electrode socket 10, and the hole diameter is the same as the corresponding positioning pin hole. The distance from the fixed end to the other end of the conductive electrode 9 satisfies at the same time: 1) when the conductive pin 12 is installed in the electrode socket 10 through the tripod pin hole 6, the length of the conductive pin 12 protruding from the insulating base 1 part meets the national standard for a three-pin plug The regulation of the extension length of the conductive pin; 2) When the conductive pin 12 is installed in the electrode slot 10 through the tripod pin hole 7, the length of the conductive pin 12 protruding from the insulating base 1 is in line with the national standard for the extension length of the conductive pin of the three-pin plug 3) When the anchor pin 13 is installed into the electrode socket 10 through the anchor pin groove 8 and is perpendicular to the socket fitting surface 19, the length of the anchor pin 13 protruding from the insulating base 1 meets the requirements of the national standard. The regulation of the protruding length of the ground pin of the three-pin plug. The width of the conductive electrode 9 is the same as that of the plug, and the thickness is 1-2 mm greater than that of the plug.

As shown in FIG. 7 and FIG. 8 , the conductive pin 12 and the anchor pin 13 are installed into the wide surface of one end of the insulating base 1 to have a conductive pin positioning hole 14 and an anchor positioning hole 15 respectively. During installation, the tripod locating pin 4 can be inserted into the conductive pin locating hole 14, and the anchor locating pin 2 can be inserted into the anchor locating hole 15. During installation, after the positioning pin 4 is inserted into the conductive pin positioning hole 14, the conductive pin 12 can be prevented from falling off; Can rotate around it.

If the plug is in the state of the two-pin plug described in Embodiment 2, the steps of converting it into a three-pin plug are as follows:

1. Rotate the anchor pin 13 around the anchor pin 2 by 90 degrees, so that the anchor pin 13 is perpendicular to the socket fitting surface 19, forming the grounding pole of the three-pin plug;

2. Pull out the two two-leg positioning pins 3, pull out the conductive pin 12 from the two-leg pin holes 7, and then reinstall the two two-leg positioning pins 3;

3. Pull out the two three-pin positioning pins 4, put the extracted conductive pin 12 into the three-pin pin hole 6, and then reinstall the two three-pin positioning pins 4 to complete the conversion from the two-pin plug to the three-pin plug.

Embodiment two

In this implementation example, the universal power plug can be used on a daily two-hole socket. As shown in Figures 1 and 4, the plug includes a plug insulating base 1, a ground pin positioning pin 2, a pair of two-pin positioning pins 3, a pair of three-pin positioning pins 4, a wire 5, five conductive electrodes 9, a A pair of conductive pins 12 and a ground pin 13.

As shown in Figure 2 and Figure 3, a pair of tripod pin holes 6, a pair of two-leg pin holes 7 and a ground pin groove 8 are provided on the socket bonding surface 19 in the insulating base 1, and the conductive pin 12 is installed on the tripod pin. In the hole 7, the anchor pin 13 is installed in the anchor pin groove 8 and parallel to the socket fitting surface 19, and a two-pin plug is formed after being installed in this way, as shown in Figure 6 . Do not install any latch in the tripod pin hole 6. The pin holes 6 and 7 are symmetrically distributed on both sides of the anchor pin slot 8 , and the center plane of the anchor pin slot 8 is perpendicular to the socket fitting surface 19 and coincides with the symmetrical axis of the socket fitting surface 19 . The relative position of the tripod pin hole 6 and the ground pin groove 8 needs to be installed on the insulating base. The relative position of 12 complies with the regulation of the national standard to the three-pin plug. The relative positions of the two holes in the tripod pin hole 7 meet the requirements of the national standard for the two-pin plug. The tripod pin hole 7 is located between the tripod pin hole 6 and the anchor pin groove 8, and the pin holes 6, 7 and the anchor pin groove 8 cannot communicate with each other. The cross-sections of the pin holes 6 and 7 are all rectangular, and the width and length of the holes meet the requirements of the national standard for pin holes. The cross-section of the anchor pin groove 8 is also rectangular, the depth of the groove 8 is the same as the width of the anchor pin 13, and the width of the groove 8 is the same as the thickness of the anchor pin 13; the length direction of the groove 8 is along the axis of symmetry of the socket fitting surface 19 , and through the side of the insulating base 1 adjacent to the socket bonding surface 19, the anchor pin 13 can be rotated 90 degrees around the anchor pin 2. After being installed on the insulating base, when the ground pin 13 is perpendicular to the socket fitting surface 19, the ground pin 13 is fitted to the wall surface perpendicular to the symmetry axis of the socket fitting surface 19 in the ground pin groove 8.

As shown in Fig. 4, there is an anchor pin hole 16, a pair of two-pin pin holes 17 and a pair of three-pin pin holes 18 on the side adjacent to the socket bonding surface 19 in the insulating base 1, respectively for Install the foot positioning pin 2, the two-leg positioning pin 3 and the tripod positioning pin 4. The apertures of the positioning pin holes 16, 17 and 18 are smaller than the width of the plug pins, and the specific size is not strictly limited. When the ground pin 13 was installed in the ground pin slot 8 on the plug, the axis of the ground pin hole 16 coincided with the axis of the ground pin hole 15 on the ground pin 13 . The positioning pin hole 16 needs to penetrate the two wide walls of the anchor pin groove 8, and the depth is not strictly limited. When the conductive pin 12 was installed in the two-pin pin hole 7 on the plug, the axis of the two-pin positioning pin hole 17 coincided with the axis of the conductive pin positioning hole 14 on the conductive pin 12 . The positioning pin hole 17 needs to run through the two wide walls of the tripod pin hole 7, and the depth is not strictly limited. When the conductive pin 12 is installed in the tripod pin hole 6 on the plug, the axis of the tripod positioning pin hole 18 coincides with the axis of the conductive pin positioning hole 14 on the conductive pin 12 . The positioning pin hole 18 needs to run through the two wide walls of the tripod pin hole 6, and the depth is not strictly limited.

Anchor pin 2, two-pin locating pin 3 and three-pin locating pin 4 are insulators. The depth of the pin hole. When alignment pin 2,3,4 cooperates with corresponding alignment pin hole 16,17,18, certain cooperating force is produced, to prevent alignment pin from coming off.

As shown in FIG. 5 , one end of the conductive electrode 9 is fixed on the inner surface of the insulating base 1 opposite to the socket fitting surface 19 , and is connected to the corresponding wire 5 . The other end of the conductive electrode 9 is provided with an electrode slot 10 and an electrode guide hole 11 . The electrode socket 10 is used for installing the conductive pin 12 or the ground pin 13, and the bottom surface of the groove is in contact with one end of the plug pin. The length of the electrode slot 10 is the same as the width of the plug, the width is the same as the thickness of the plug, and the depth is half of the width of the plug. When installed on the insulating base 1, the two wide walls of each electrode socket 10 are flush with the wide walls of the pin holes 6, 7, and viewed from the front of the socket fitting surface 19 on the base 1 to the other side , the electrode slot 10 is located directly behind the pin holes 6 and 7 on the base 1 and the anchor pin slot 8, and the long side of the slot 10 coincides with the long sides of the holes 6 and 7 and the slot 8, and the short side of the slot 10 coincides with the long side of the slot 8 The short sides of 6 and 7, groove 8 coincide. The electrode guide hole 11 is a semicircular hole, the axis of the hole is located at the center of the top surface of the electrode socket 10, and is perpendicular to the wide wall surface of the electrode socket 10, and the hole diameter is the same as the corresponding positioning pin hole. The distance between the fixed end of the conductive electrode 9 and the other end satisfies at the same time: 1) When the conductive pin 12 is installed in the electrode socket 10 through the tripod pin hole 6, the length of the conductive pin 12 protruding from the insulating base 1 part meets the national standard for a three-pin plug The regulation of the extension length of the conductive pin; 2) When the conductive pin 12 is installed in the electrode slot 10 through the tripod pin hole 7, the length of the conductive pin 12 protruding from the insulating base 1 is in line with the national standard for the extension length of the conductive pin of the three-pin plug 3) When the anchor pin 13 is installed into the electrode socket 10 through the anchor pin groove 8 and is perpendicular to the socket fitting surface 19, the length of the anchor pin 13 protruding from the insulating base 1 meets the national standard. The regulation of the protruding length of the ground pin of the three-pin plug. The width of the conductive electrode 9 is the same as that of the plug, and the thickness is 1-2 mm greater than that of the plug.

As shown in FIG. 7 and FIG. 8 , the conductive pin 12 and the anchor pin 13 are installed into the wide surface of one end of the insulating base 1 to have a conductive pin positioning hole 14 and an anchor positioning hole 15 respectively. During installation, the tripod locating pin 4 can be inserted into the conductive pin locating hole 14, and the anchor locating pin 2 can be inserted into the anchor locating hole 15. During installation, after the positioning pin 4 is inserted into the conductive pin positioning hole 14, the conductive pin 12 can be prevented from falling off; Can rotate around it.

If the plug is in the state of the three-pin plug described in Example 1, the steps to convert it into a two-pin plug are as follows:

1. Rotate the anchor pin 13 90 degrees around the anchor pin 2, so that the anchor pin 13 is parallel to the socket fitting surface 19;

2. Pull out the two tripod positioning pins 4, pull out the conductive pin 12 from the tripod pin hole 6, and then reinstall the two tripod positioning pins 4;

3. Pull out the two two-pin positioning pins 3, put the extracted conductive pin 12 into the two-pin pin hole 7, and then reinstall the two two-pin positioning pins 3 to complete the conversion from the three-pin plug to the two-pin plug.

Claims (3)

1. A single-phase universal power plug, characterized in that it comprises an insulating base, anchor pins, two pin pins, three pin pins, wires, conductive electrodes, conductive pins, anchor pins, and socket bonding surfaces. The socket bonding surface of the insulating base is provided with anchor pin grooves, two-leg pin holes, and three-leg pin holes. Two three-leg pin holes and two two-leg pin holes are symmetrically arranged on both sides of the anchor pin groove. The foot pin hole is located between the tripod pin hole and the foot pin groove, and the tripod pin hole, the two-leg pin hole, and the foot pin groove cannot communicate with each other; the center surface of the foot pin groove is perpendicular to the fitting surface of the socket, and is perpendicular to the socket The symmetry axis of the fitting surface coincides; the length direction of the anchor pin slot is along the symmetry axis of the socket fitting surface, and runs through the side where the upper edge of the insulating base is adjacent to the outer edge of the socket fitting surface, and the anchor pin wraps around the anchor positioning pin It can be rotated 90 degrees; there is a positioning pin hole on the side where the insulating base is adjacent to the fitting surface of the socket, two positioning pin holes for two pins and two positioning pin holes for three pins, and the positioning pins for the base and the positioning pins for the two pins are installed respectively. Pin and tripod locating pin, the aperture of locating pin hole is less than the width of plug pin. 2. The single-phase universal power plug according to claim 1, characterized in that: the conductive pin is a flat cuboid with arc-shaped ends, one end of which is provided with a positioning hole for the conductive pin, and the conductive pin is installed in the tripod pin hole or two In the foot pin hole, cooperate with the ground pin to form a three-pin plug or a two-pin plug. 3. The single-phase universal power plug according to claim 1, characterized in that: one end of the conductive electrode is fixed in the insulating base and connected to the wire, the other end of the conductive electrode is provided with an electrode slot, and the electrode There is a semicircular electrode guide hole at the center of the upper part of the two side walls of the slot. The length of the electrode slot is the same as the width of the pin, the width is the same as the thickness of the pin, the depth is half of the width of the pin, and the thickness is 1-2 mm larger than the thickness of the pin. .

Images