Plug adaptor extension mechanism

Conversion Plug Extension Mechanism

Technical Field

[0001] The invention relates to the field of conversion plugs, in particular to a conversion plug extension mechanism.

Background Art

[0002]With the increasing global tourism and trade, travel conversion plugs or travel converters have been widely used. With the development of technology, the types and functions of conversion plugs are constantly updated, for example, German conversion plugs.

[0003]However, due to the limitation of the internal structure design, the German conversion plug has the following disadvantages: when pins are pushed out for use, a push handle needs to be pushed to move for a stroke to push an plug bush to pass out of the shell; then, the push handle is pushed to move for a next stroke, so that the pins can be pushed out of the shell and out of a lower end of the plug bush for use. Therefore, with the structure having a large position and space to be reserved on the German conversion plug, the push handle can complete two strokes. Therefore, the occupied space is larger, and the size of the product is bigger, which dos not facilitate the miniaturization development of the product.

Summary of the Invention

[0004] In view of the above-mentioned deficiency, the object of the present invention is to provide a conversion plug extension mechanism, which also pushes out the plug bush and the pin assembly likewise, and the stroke of the push handle can be set very short, so that the space occupied by the movement of the push handle is reduced, the inner space of a product is saved, and the size of the product is reduced conveniently, which facilitates the miniaturization of the whole product.

[0005]The technical solution adopted by the invention for achieving the above purpose is as follows.

[0006]A conversion plug extension mechanism comprises a shell, a push handle arranged on the shell, a plug bush arranged in the shell and movably connected with the push handle, and a pin assembly arranged in the shell, characterized by further comprising a fixed rack arranged on the shell and extending into the plug bush, a movable rack connected with the pin assembly, and a gear arranged on the plug bush and meshed with the fixed rack and the movable rack respectively.

[0007]As a further improvement of the present invention, the movable rack is fixedly connected with the pin assembly.

[0008]As a further improvement of the present invention, the gear is fixed to the plug bush.

[0009]As a further improvement of the present invention, the gear is fixed to the plug bush by a screw.

[0010]As a further improvement of the present invention, the shell comprises a base and an upper cover matched with the base, wherein an opening through which the plug bush and the pin assembly pass is formed in the base.

[0011]As a further improvement of the present invention, the fixed rack is integrally formed on the base, or longitudinally and fixedly mounted on the base by a connector.

[0012]As a further improvement of the present invention, the fixed rack is longitudinally fixed to the upper cover.

[0013] As a further improvement of the present invention, the push handle mainly consists of a linkage block arranged in the shell, and a pushing portion connected to the end of the linkage block and penetrating through the outside of the shell, wherein the linkage block is connected with a plug bush; Meanwhile, a strip-shaped hole for the pushing portion to move up and down is formed on the shell.

[0014]As a further improvement of the invention, at least one guide rod is arranged in the shell, and the linkage block is sleeved on the guide rod.

[0015]As a further improvement of the invention, the pin assembly further comprises a transverse connection block, and the two pins are perpendicularly arranged at a lower end of the transverse connection block, wherein the movable rack is fixedly connected with the transverse connection block.

[0016]The invention has following beneficial effects. By additionally arranging and combining the fixed rack, the gear and the movable rack meshed with each other, as long as the push handle is pushed downwards to move for a first stroke, the first downward stroke can be provided for the plug bush and the pin assembly, namely the plug bush and the pin assembly are pushed out of the shell synchronously; meanwhile, the pin assembly can also acquire a second stroke which moves downwards relative to the plug bush, so that the lower end of the pin assembly passes out of the plug bush, i.e. the push handle moves for one stroke, and the pin assembly can acquire two strokes. As can be seen from this, the stroke of the push handle can be set to be shorter when the plug bush and the pin assembly are pushed out similarly, so that the space occupied by the movement of the push handle is reduced, the inner space of a product is saved, and the size of the product is reduced conveniently, which facilitates the miniaturization of the whole product.

[0017]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.

Brief Description of the Drawings

[0018] FIG. 1 is an overall exploded view of the present invention;

[0019] FIG. 2 is an internal structure schematic diagram that the plug bush and pin assembly are in the non-push-out state in the present invention;

[0020] FIG. 3 is a structure schematic diagram that the linkage block of the push handle sleeved on guide rod in the present invention;

[0021] FIG. 4 is a structural schematic diagram of the combination of a movable rack, a gear and a fixed rack when the plug bush and the pin assembly are in the non-pushout state in the present invention;

[0022] FIG. 5 is an overall external structure schematic diagram that the plug bush and pin assembly are in the non-push-out state in the present invention;

[0023] FIG. 6 is an internal structure schematic diagram that the plug bush and pin assembly are in the push-out state in the present invention;

[0024] FIG. 7 is a schematic structural diagram of the combination of a movable rack, a gear and a fixed rack when the plug bush and the pin assembly are in the push-out state in the present invention;

[0025] FIG. 8 is an overall external structural schematic diagram that the plug bush and the pin assembly in the push-out state in the present invention.

Detailed Description of the Invention

[0026] 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.

[0027] Referring to FIGS. 1, 2 and 4, the present embodiment provides a conversion plug extension mechanism, comprising a shell 1, a push handle 2 arranged on the shell 1, a plug bush 3 arranged in the shell 1 and movably connected with the push handle 2, and a pin assembly 4 arranged in the shell 1. The conversion plug extension mechanism in the embodiment further comprises a fixed rack 5 arranged on the shell 1 and extending into the plug bush 3, a movable rack 6 connected with the pin assembly 4, and a gear 7 arranged on the plug bush 3 and meshed with the fixed rack 5 and the movable rack 6 respectively. As shown in FIGS. 2, 4 and 5, the plug bush 3 and the pin assembly 4 are in a non-push-out state. When the push handle 2 is pushed downwards, the push handle 2 drives the plug bush 3 to move downwards, and the gear 7 on the plug bush 3 moves downwards. Since the fixed rack 5 is fixed on the shell 1, the continuously moved gear 7 can roll along the fixed rack 5, for example, rotate in direction A (counterclockwise) in FIG. 2. In the process, as the gear 7 is in meshed connection with the movable rack 6, the movable rack 6 is also driven to synchronously move downwards when the gear 7 continuously moves downwards along with the plug bush 3 and passes out of the shell 1, and then the movable rack 6 drives the pin assembly 4 to synchronously move downwards for a first stroke, so that the pin assembly 4 and the plug bush 3 synchronously pass out of the shell 1; meanwhile, when the gear 7 rotates due to the presence of the fixed rack 5, the gear 7 synchronously pushes the movable rack 6 meshed with the gear 7 downwards, the movable rack 6 drives the pin assembly 4 to synchronously move downwards for a second stroke, and the pin assembly 4 moves downwards for the second stroke relative to the plug bush 3, so that a lower end of the pin assembly 4 passes out of the plug bush 3, as shown in FIGS. 68.

[0028] Therefore, as long as the push handle 2 is pushed downwards to move for the first stroke, the first downward stroke can be provided for the plug bush 3 and the pin assembly 4, namely the plug bush 3 and the pin assembly 4 are pushed out of the shell 1 synchronously; meanwhile, the pin assembly 4 can also acquire a second stroke which moves downwards relative to the plug bush 3, so that the lower end of the pin assembly 4 passes out of the plug bush 3, i.e. the pin assembly 4 can acquire two strokes. As can be seen from this, the stroke of the push handle 2 can be set to be shorter when the plug bush 3 and the pin assembly 4 are pushed out similarly, so that the space occupied by the movement of the push handle 2 is reduced, the inner space of a product is saved, and the size of the product is reduced conveniently, which facilitates the miniaturization of the whole product.

[0029] In this embodiment, the movable rack 6 is fixedly connected with the pin assembly 4. Specifically, as shown in FIG. 2, the pin assembly 4 further comprises a transverse connection block 41, and the two pins 42 are perpendicularly arranged at a lower end of the transverse connection block 41, wherein the movable rack 6 is fixedly connected with the transverse connection block 41. Therefore, the movable rack 6 is integrally connected with the transverse connection block 41, and when the movable rack 6 moves downwards, the pin assembly 4 is driven to move downwards synchronously.

[0030] In this embodiment, the gear 7 is fixed to the plug bush 3. Specifically, as shown in FIG. 2, the gear 7 is fixed to the plug bush 3 by a screw 71. Of course, the gear 7 may be fixed to the plug bush 3 by other structures or other means. Therefore, the gear is integrally connected with the plug bush 3, and when the plug bush 3 moves downwards, the gear 7 is driven to move downwards synchronously.

[0031] In the embodiment, as shown in FIG. 1, the shell 1 comprises a base 11 and an upper cover 12 matched with the base 11, wherein an opening through which the plug bush 3 and the pin assembly 4 pass is formed in the base 11; and when the plug bush 3 and the pin assembly 4 are not pushed out, lower end surfaces of the plug bush 3 and the pin assembly 4 are flush with the opening, as shown in FIG. 5. After the plug bush 3 and the pin assembly 4 are pushed out, lower parts of the plug bush 3 and the pin assembly 4 pass out of a lower end surface of the base 11 through the opening, as shown in FIG. 8.

[0032] For the specific mounting of the fixed rack 5, it may be integrally formed on the base 11, or the fixed rack 5 may be longitudinally and fixedly mounted on the base 11 by a connector 51, so that the gear 7 can be meshed with the fixed rack 5, and the gear 7 can roll up and down along the fixed rack 5, as shown in FIG. 2. The specific structure and configuration of the connector 51 can be set according to specific requirements, as shown in FIGS. 2 and 6. Of course, it is also possible to fix the fixed rack 5 longitudinally on the upper cover 12 as long as the fixed rack 5 can extend to the side of the gear 7 for being meshed with the gear 7, and the gear 7 can roll up and down along the fixed rack 5.

[0033] In the embodiment, as shown in FIG. 2, the push handle 2 mainly consists of a linkage block 21 arranged in the shell 1 and a push portion 22 connected to an end of the linkage block 21 and passing out of the shell 1, wherein the linkage block 21 is movably connected with the plug bush 3 by the positioning seat 30; and the locking protrusion 91, the positioning strip 211 and the push block 212 are all arranged on the linkage block 21. Therefore, when the linkage block 21 of the push handle 2 moves downwards, the plug bush 3 is driven to move downwards synchronously. Meanwhile, as shown in FIG. 5, a strip-shaped hole 10 for the push portion 22 to move up and down is formed in the shell 1, and the strip-shaped hole 10 provides a vertical path for the push portion 22 to move up and down.

[0034] In order to improve the vertical stability of the push handle 2 moving up and down, at least one guide rod 8 is arranged in the shell 1, and the linkage block 21 is sleeved on the guide rod 8, as shown in FIG. 3. When the push handle 2 moves up and down, the linkage block 21 can vertically move up and down along a plurality of guide rods 8, without the phenomena of displacement, bending and the like.

[0035]The conversion plug extension mechanism provided by the embodiment of the invention is particularly suitable for a conversion plug, and the synchronous push-out function is realized for the plug bush 3 and the pin assembly 4 in the plug. During specific operations, the plug bush 3 and the pin assembly 4 can be pushed out only by pushing the push handle 2 downwards, and the plug bush 3 and the pin assembly 4 can be retracted by pushing the push handle 2 upwards. However, with regard to other structures and working principles inside the conversion plug, the same is true of the conventional conversion plug in the art.

[0036]Preferably, the conversion plug extension mechanism provided by the embodiment is particularly suitable for use in European conversion plugs, such as German or French conversion plugs, particularly for use in high power appliances below 16 A.

[0037] In the description above, only the preferred embodiments of the present invention has been described, and the technical scope of the present invention is not limited in any way. Therefore, other structures obtained by adopting the same or similar technical features as those of the above embodiments of the present invention are within the scope of the present invention.