Patent Description:
Since the standards for the sockets in each country are not completely uniform, a plug cannot be universally used all over the world. When people go to different countries, it is necessary to configure a plug corresponding to the country so as to supply power for portable electronic devices. If going to several countries at a time, consumers have to take power plugs corresponding to several countries, which causes great trouble for people who travel across countries or have a business travel.

As a result, multi-national power plugs are commonly available on the market that can be adapted to different national socket standards. It is disclosed in <CIT>) that a plurality of pins <NUM> of different specifications are grouped on the same power converter. However, the two groups of pins, American (US) pins <NUM> and Australian (AU) pin <NUM>, have only two legs, i. without ground pins. Although this power converter reduces the internal volume when reducing the number of legs, it has the risk of electric shock and leakage when used in high-power electrical appliances, which has low safety and does not meet the safety standards.

At the same time, the <CIT>), discloses multiple groups of conductive pins respectively containing three pins, wherein the multiple groups of conductive pins are arranged successively along one direction, so that the multiple groups of conductive pins occupy a large space, resulting in a large volume of the whole product. It cannot realize the development of the product to be miniaturized and is not convenient to carry the product.

It can be seen from the above that, for the existing multi-national power plugs, it is impossible to meet the requirements of meeting the safety standards and developing towards miniaturization at the same time.

There are some power plugs further disclosed in other patent documents. <CIT> discloses an adapter set. The adapter set is made up of a plug part and a socket part. The plug part is provided with at least one three-pole plug contact of a particular country standard at one end and a three pole safety plug socket at the other end of the adapter set. The socket part is provided with a three-pole safety plug and a three-pole multi-way plug socket. The adapter set comprises one single safety plug, namely the plug formed on the socket part. It is provided that the polarity of the multi-way plug socket matches the polarity of the plug contacts. <CIT> discloses a multinational socket converter of terrestrial pole connection structure and applied this structure. A terrestrial pole connection structure includes the terrestrial pole plug bush, still includes along the plug of plug orientation slip setting, the plug includes the terrestrial pole bolt, and the terrestrial pole bolt includes telescopic terrestrial pole bolt, telescopic terrestrial pole bolt includes and forms the terrestrial pole fork of the slidable relation of cup jointing with the fixed fixed portion of terrestrial pole plug bush with fixed portion, electrical connection is realized to terrestrial pole fork, fixed portion and terrestrial pole plug bush. A multinational socket converter, includes above -mentioned terrestrial pole connection structure. <CIT> discloses a rotatable and selectable push type multinational power source adapter, which includes a shell, a socket and pins with at least two of standards, wherein the socket and the pins are arranged in the shell; the shell comprises an upper cover and base; the base is rotatablely assembled on the upper cover relative to a center rotation shaft; the socket is arranged in the upper cover; the pins with different standards are arranged in the base and synchronously rotates therewith; the pins with different standards are peripherally distributed around the center rotation shaft; each pin can be arranged relative to the center rotation shaft by means of parallel sliding, so that each pin has a work position which is extended out of the shell in a sliding way and a hidden position which is retracted into the shell in a sliding way; the side wall of the upper cover is provided with a positioning slidable groove which is extended parallel with the extension direction of the pins; a sliding component which can freely slide along the positioning slidable groove is arranged correspondingly to the positioning slidable groove; and the sliding component pushes one pin to be extended at a work position which is out of the shell when the pin is rotated into a function region thereof. <CIT> discloses a multipath sliding plug which includes a first pin component, a second pin component, a third pin component, a first upper bridge strip, a first lower bridge strip, a third upper bridge strip and a third lower bridge strip, wherein the second pin component includes a second pin piece I, a second pin piece II and a second pin piece III which are independently disconnected; the second pin piece I is pressed to be connected to the second pin piece II and the second pin piece III in a matched mode, so that push-out and push-in of the second pin component are realized; a first gap is arranged between the second pin piece I and the second pin piece II, and a second gap is arranged between the second pin piece I and the second pin piece III; the first upper bridge strip and the first lower bridge strip can pass through the second gap when the first upper bridge strip and the first lower bridge strip are matched, so that pushout and push-in of the first pin component are realized; and the third upper bridge strip and the third lower bridge strip can pass through the first gap when the third upper bridge strip and the third lower bridge strip are matched, so that push-out and push-in of the third pin component are realized.

In view of the above-mentioned disadvantages, it is an object of the present invention to provide a small sliding multiple plug, which is small in size, has high safety in use, and meets the requirements of safety standards and developing to miniaturization. The invention is a sliding multiple plug according to claim <NUM>.

As a further improvement of the invention, at least one retaining wall is extended in the housing on the side of at least one of the first pin, the second pin and the third pin.

As a further improvement of the invention, the second pin and the third pin are both located on the upper sides of the live line leg and the null line leg of the first pin.

As a further improvement of the invention, the first pin is T-shaped; the second pin is C-shaped, L-shaped or O-shaped; and the third pin is C-shaped, L-shaped, D-shaped or O-shaped.

As a further improvement of the invention, the first pin is a UK standard of pin; the second pin is a US standard of pin; and the third pin is an AU standard of pin or a CN standard of pin.

As a further improvement of the present invention, the pin hole comprises a first leg hole through which a live line leg passes, a second leg hole through which a null line leg passes, and a third leg hole through which a ground line leg passes; the third leg hole is perpendicularly arranged at one side of the middle point of the first leg hole and the second leg hole; a bottom surface of the housing comprises a first bottom edge, a second bottom edge and a third bottom edge, wherein a first region is constituted by the first bottom edge, a second bottom edge, a parallel line passing through the first leg hole and being parallel to the first bottom edge, and a parallel line passing through the third leg hole and being parallel to the second bottom edge; a second region is constituted by the first bottom edge, a third bottom edge, a parallel line passing through the second foot hole and being parallel to the first bottom edge, and a parallel line passing through the third foot hole and being parallel to the third bottom edge; the first region and the second region are respectively provided on both sides of the ground line leg; the second pin and the corresponding pin hole are arranged in the first region, and the third pin and the corresponding pin hole are arranged in the second region; the second pin comprises a fourth leg, a fifth leg and a sixth leg, and at least one of the fourth leg, the fifth leg and the sixth leg is a ground line leg; the third pin comprises a seventh leg, an eighth leg and a ninth leg, wherein at least one of the seventh leg, the eighth leg and the ninth leg is a ground line leg; and positioning guide seats are provided in the housing to match the first pin, the second pin and the third pin, respectively.

As a further improvement of the invention, the fourth leg is directed towards a midpoint of the first leg hole and the second leg hole; and the ninth leg is directed towards a midpoint of the first leg hole and the second leg hole.

As a further improvement of the present invention, the first pin further comprises a UK standard of sliding piece and a UK standard of pin seat, wherein the UK standard of pin seat is provided with a UK standard of clamping mechanism and a UK standard of return spring, and the UK standard of sliding piece is clamped and movable in the UK standard of clamping mechanism; the UK standard of sliding piece and the UK standard of pin seat are provided with a UK standard of positioning hole; a UK standard of limiting guide post is provided at a corresponding position of the positioning guide seat; and the pushing-out and pushing-in of the first pin is controlled by the matching of the UK standard of positioning hole and the UK standard of limiting guide post.

As a further improvement of the present invention, the second pin comprises a US standard of sliding piece and a US standard of pin seat; the US standard of pin seat is provided with a US standard of clamping mechanism and a US standard of return spring; the US standard of sliding piece is clamped and movable in the US standard of clamping mechanism; the US standard of sliding piece and the US standard of pin seat are provided with a US standard of positioning hole; a US standard of limiting guide post is provided at a corresponding position of the positioning guide seat; and the pushing-out and pushing-in of the second pin is controlled by the matching of the US standard of positioning hole and the US standard of limiting guide post.

As a further improvement of the present invention, the third pin comprises an AU-CN sliding piece and an AU-CN pin seat; the AU-CN pin seat is provided with an AU-CN clamping mechanism and an AU-CN return spring; the AU-CN sliding piece is clamped and movable in the AU-CN clamping mechanism; the AU-CN sliding piece and the AU-CN pin seat are provided with an AU-CN positioning hole; an AU-CN limiting guide post is provided at a corresponding position of the positioning guide seat; and the pushing-out and pushing-in of the third pin is controlled by the matching of the AU-CN positioning hole and AU-CN limiting guide post.

The invention has the following beneficial effects.

The above is an overview of the technical scheme of the invention. The following is a further explanation of the invention in combination with the attached drawings and specific implementations.

In order to further explain the technical means and effects of the present invention for achieving the intended purpose, the following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to <FIG> and <FIG>, an embodiment of the present invention provides a small sliding multiple plug comprising a housing <NUM> and a plurality of pin holes <NUM> provided on the bottom surface of the housing <NUM>. Multiple national standards of pins can be retained in the housing <NUM>, and can be made in combination according to specific requirements; and the shape of the pin hole <NUM> is a corresponding hole shape according to the requirements of a specific standard. Meanwhile, the side surface of the housing <NUM> is provided with a push key <NUM> and a sliding groove <NUM>, wherein the push key <NUM> can drive a corresponding standard of pin to move along the sliding groove <NUM> which can play the role of guiding and controlling the displacement distance.

In the present embodiment, as shown in <FIG> and <FIG>, a first pin <NUM>, a second pin <NUM> and a third pin <NUM> are arranged in the housing <NUM>, wherein the first pin <NUM> mainly consists of a ground line leg <NUM>, a live line leg <NUM> and a null line leg <NUM>; when the ground line leg <NUM> of the first pin <NUM> is taken as a central point, the second pin <NUM> is arranged on one side of the central point, and the third pin <NUM> is arranged on the other side of the central point; and the second pin <NUM> and the third pin <NUM> are respectively composed of three legs including the ground line leg. Meanwhile, the second pin (<NUM>) and the third pin (<NUM>) are both located on the upper sides of the live line leg (<NUM>) and the null line leg (<NUM>) of the first pin (<NUM>). By arranging the second pin <NUM> and the third pin <NUM> on shoulders of both sides of the first pin <NUM>, the space on the shoulders of both sides of the first pin <NUM> is effectively used, so that the volume of the small plug of the whole converter can be further reduced, facilitating the development of the product to be miniaturized and convenient to carry. Meanwhile, the first pin <NUM>, the second pin <NUM> and the third pin <NUM> all contain the ground line leg. When they are used in a high-power electric appliance, there is no risk of electric shock and leakage, with high safety, which meets the safety standards. Therefore, the use safety of the product is greatly improved while reducing the volume of the product. Moreover, the legs can be pushed out and pushed in without crossing each other, so that the operation is smooth and practical.

Specifically, as shown in <FIG>, the pin hole <NUM> comprises a first leg hole <NUM> through which a live line leg <NUM> passes, a second leg hole <NUM> through which a null line leg <NUM> passes, and a third leg hole <NUM> through which a ground line leg <NUM> passes, wherein the third leg hole <NUM> is perpendicularly arranged on one side of the midpoint of the first leg hole <NUM> and the second leg hole <NUM>, and the first leg hole <NUM>, the second leg hole <NUM> and the third leg hole <NUM> are arranged on the housing <NUM> at a relatively central position.

Specifically, as shown in <FIG>, the bottom surface <NUM> of the housing <NUM> comprises a first bottom edge <NUM>, a second bottom edge <NUM> and a third bottom edge <NUM>; a first region <NUM> and a second region <NUM> are formed on two shoulders of the first leg hole <NUM> and the second leg hole <NUM>, namely, the ground line leg <NUM>, wherein the first region <NUM> is constituted by a closed loop of the first bottom edge <NUM>, the second bottom edge <NUM>, a parallel line passing through the first leg hole <NUM> and parallel to the first bottom edge <NUM>, and a parallel line passing through the third leg hole <NUM> and parallel to the second bottom edge <NUM>; and the second region <NUM> constituted by a closed loop of the first bottom edge <NUM>, a third bottom edge <NUM>, a parallel line passing through the second leg hole <NUM> and parallel to the first bottom edge <NUM>, and a parallel line passing through the third leg hole <NUM> and parallel to the third bottom edge <NUM>. Thus, the first region (<NUM>) and the second region (<NUM>) are provided on both sides of the ground line leg (<NUM>), respectively. Specifically, the second pin <NUM> and the corresponding pin hole are disposed in the first region <NUM>, and the third pin <NUM> and the corresponding pin hole are disposed in the second region <NUM>.

In the present embodiment, in order to increase the ground line legs of the second pin <NUM> and the third pin <NUM> in a limited space so as to improve the safety in use, the gap between the legs needs to be made small while ensuring that the gap between each two legs can meet the safety clearance. As shown in <FIG>, the present embodiment is provided with at least one retaining wall <NUM> extended in the housing <NUM>, and the retaining wall <NUM> is located on the side of at least one of the first pin <NUM>, the second pin <NUM> and the third pin <NUM>. By spacing the two legs apart by the retaining wall <NUM> so that the creepage distance between the two legs increases, thereby increasing the electrical clearance between the two legs, the legs meet the safety regulations. Thus, the entire product has both advantages of meeting the safety standard and being small in size, so that the product can be miniaturized while meeting the safety standard.

However, with regard to the specific position of the retaining wall <NUM>, it can be located between the null line leg and the live line leg in the first pin <NUM>, the second pin <NUM> and the third pin <NUM>. The specific number of retaining walls <NUM> can be set according to specific needs.

As shown in <FIG>, a positioning guide seat <NUM> (the mounting seat can be provided separately or directly integrally formed with the housing) is provided in the housing <NUM> (no electrical components such as a circuit board, a capacitor, a conductive sheet and a safety valve are shown); a first pin <NUM>, a second pin <NUM> and a third pin <NUM> are matchingly provided on the positioning guide seat <NUM> which is provided with a UK standard of limiting guide post <NUM>, a US standard of limiting guide post <NUM> and an AU-CN standard of limiting guide post <NUM> for positioning, guiding and limiting; the second pin <NUM> and the third pin <NUM> are respectively provided in the first region <NUM> and the second region <NUM> formed by two shoulders of the first pin <NUM>; and the positions of the second pin <NUM> and the second pin <NUM> are interchangeable.

As shown in <FIG> and <FIG>, the first pin <NUM> is a UK standard of pin, comprising a live line leg <NUM>, a null line leg <NUM>, a ground line leg <NUM>, a UK standard of sliding piece <NUM> and a UK standard of pin seat <NUM>; the UK standard of pin seat <NUM> is provided with a UK standard of clamping mechanism <NUM> and a UK standard of return spring, and the UK standard of sliding piece <NUM> is clamped and movable in the UK standard of clamping mechanism <NUM>; the live line leg <NUM>, null line leg <NUM> and ground line leg <NUM> are provided below the UK standard of pin seat <NUM>; and the UK standard of sliding piece <NUM> and the UK standard of pin seat <NUM> are provided with a UK standard of positioning hole <NUM> matched with the UK standard of limiting guide post <NUM> to control the pushing-out and pushing-in of the first pin <NUM>.

As shown in <FIG> and <FIG>, the second pin <NUM> is a US standard of pin, comprising a fourth leg <NUM>, a fifth leg <NUM>, a sixth leg <NUM>, a US standard of sliding piece <NUM> and a US standard of pin seat <NUM>, wherein at least one of the fourth leg <NUM>, the fifth leg <NUM> and the sixth leg <NUM> is a ground line leg, and the other two are a live line leg and a null line leg, respectively; the fourth leg <NUM> faces towards the middle point of the first leg hole <NUM> and the second leg hole <NUM>; the US standard of pin seat <NUM> is provided with a US standard of clamping mechanism <NUM> and a US standard of return spring <NUM>, and the US standard of sliding piece <NUM> is clamped and movable in the US standard of clamping mechanism <NUM>; the fourth leg <NUM>, the fifth leg <NUM> and the sixth leg <NUM> are arranged below the US standard of pin seat <NUM>; and the US standard of sliding piece <NUM> and the US standard of pin seat <NUM> are provided with a US standard of positioning hole <NUM> matched with the US standard of limiting guide post <NUM> to control the pushing-out and pushing-in of the second pin <NUM> so as to play a guiding role.

As shown in <FIG> and <FIG>, the third pin <NUM> is an AU standard or CN standard of pin, comprising a seventh leg <NUM>, an eighth leg <NUM>, a ninth leg <NUM>, an AU-CN sliding piece <NUM> and an AU-CN pin seat <NUM>, wherein at least one of the seventh leg <NUM>, the eighth leg <NUM> and the ninth leg <NUM> is a ground line leg, the other two are a live line leg and a null line leg, respectively, and the ninth leg <NUM> faces towards the midpoint of the first leg hole <NUM> and the second leg hole <NUM>; the AU-CN pin seat <NUM> is provided with an AU-CN clamping mechanism <NUM> and an AU-CN return spring <NUM>, and the AU-CN sliding piece <NUM> is clamped and movable in the AU-CN pin seat <NUM>; the seventh leg <NUM>, the eighth leg <NUM> and the ninth leg <NUM> are provided below the AU-CN pin seat <NUM>; and the AU-CN sliding piece <NUM> and the AU-CN pin seat <NUM> are provided with an AU-CN positioning hole <NUM> matched with the AU-CN limiting guide post <NUM> to control the pushing-out and pushing-in of the third pin <NUM> so as to play a guiding role.

As shown in <FIG>, the principles and possible configurations of this embodiment and other shapes of pins are included.

The first pin <NUM> is a UK standard of pin, the ground line leg <NUM> is provided in the middle, and a US standard of pin and an AU (CN) standard of pin are respectively provided on both sides of the ground line leg <NUM>; the positions of the pins on the both sides can be interchanged, and the first pin <NUM> is T-shaped; the second pin <NUM> may be C-shaped or L-shaped or O-shaped; and the third pin <NUM> may be C-shaped, L-shaped, D-shaped or O-shaped.

In this embodiment, as shown in <FIG>, a fuse <NUM> is provided in the housing <NUM> among three legs of the third pin <NUM>, i. among the seventh leg <NUM>, the eighth leg <NUM> and the ninth leg <NUM>; meanwhile, an opening <NUM> through which the fuse <NUM> passes is formed in the AU-CN standard of sliding piece <NUM> and the AU-CN standard of pin seat <NUM>, and the lower end of the fuse <NUM> extends to the bottom surface <NUM> of the housing <NUM>, as shown in <FIG>. The fuse <NUM> is added in the housing <NUM> with a small limited space, and is cleverly arranged among three legs of the third pin <NUM>, so as to further improve the electric safety and meet the safety standards on the basis of ensuring the overall miniaturization of the product.

In this embodiment, the US standard of pin or the AU standard (or CN standard) of pin are provided at both shoulders of the UK standard of pin at the same time to effectively use the space of the shoulders at both sides of the UK standard of pin, so that the volume of the small plug of the whole converter can be further reduced, facilitating the development of the product to be miniaturized and convenient to carry. Specifically, the volume of the product can be reduced by about <NUM>%. When they are used in high-power electrical appliances, there is no risk of electric shock and leakage, with high safety, which meets the safety standards. Specifically, it conforms to IEC <NUM> and BS8546 standards.

Claim 1:
A sliding multiple plug, comprising a housing (<NUM>), and a plurality of pin holes (<NUM>) arranged on the bottom surface of the housing (<NUM>), wherein a first pin (<NUM>), a second pin (<NUM>) and a third pin (<NUM>) are arranged in the housing (<NUM>), wherein the first pin (<NUM>) comprises a ground line leg (<NUM>), a live line leg (<NUM>) and a null line leg (<NUM>); when the ground line leg (<NUM>) of the first pin (<NUM>) is taken as a central point, the second pin (<NUM>) is arranged on one side of the central point, and the third pin (<NUM>) is arranged on the other side of the central point; and the second pin (<NUM>) and the third pin (<NUM>) are respectively composed of three legs including the ground line leg; characterized in that a fuse (<NUM>) is arranged in the housing (<NUM>) among the three legs of the third pin (<NUM>).