A retractable mechanism for a power converter europlug with a grounding prong

Abstract

The application discloses a telescopic mechanism of a power converter European plug with a grounding pin, which comprises a shell, a push handle arranged on the shell, a plug sleeve arranged in the shell and movably connected with the push handle, a pin assembly arranged in the shell, a fixed gear rack arranged on the shell and extending into the plug sleeve, a movable gear rack connected with the pin assembly, and a gear arranged on the plug sleeve and engaged with the fixed gear rack and the movable gear rack respectively. The telescopic mechanism of the power converter European plug with the grounding pin provided by the application pushes out the plug sleeve and the pin assembly, the stroke of the push handle can be set very short, the space occupied by the movable push handle is reduced, the internal space of the product is saved, the product volume is reduced, and the miniaturization of the whole product is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conversion plug, in particular to a telescopic mechanism of a power converter Euro plug with grounding pin. BACKGROUND

[0002] With the increasing global tourism and trade, travel conversion plug or travel converter has been widely used. With the continuous improvement of technology, the type and function of conversion plug are also constantly updated, for example, German standard conversion plug.

[0003] However, due to the limitation of the internal structure design, the German standard conversion plug has the following shortcomings: when the plug pin is used, the push handle needs to be moved for a stroke to push the Euro plug sleeve out of the shell; then, the push handle needs to be moved for another stroke to push the plug pin out of the shell and out of the lower end of the Euro plug sleeve for use. Therefore, in the structure, a larger space needs to be reserved on the German standard conversion plug for the push handle to complete the two strokes. Therefore, it occupies a large space and has a large product volume, which is not conducive to the miniaturization of the product. SUMMARY

[0004] In view of the above shortcomings, the purpose of the present application is to provide a telescopic mechanism of a power converter Euro plug with grounding pin, which also pushes the Euro plug sleeve and the Euro plug pin assembly out. 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 internal space of the product is saved, the product volume is reduced, and the miniaturization of the entire product is facilitated.

[0005] The technical solution adopted by the present application to achieve the above purpose is:

[0006] A telescopic mechanism of a power converter Euro plug with grounding pin, comprising a shell, a push handle arranged on the shell, a Euro plug sleeve arranged in the shell and movably connected with the push handle, and a Euro plug pin assembly arranged in the shell, characterized in that it further comprises a fixed rack arranged on the shell and extending into the Euro plug sleeve, a movable rack connected with the Euro plug pin assembly, and a gear arranged on the Euro plug sleeve and engaged with the fixed rack and the movable rack respectively.

[0007] As a further improvement of the present application, the Euro plug pin assembly comprises two pins, two grounding conductors are arranged on the Euro plug sleeve, and the two pins and the two grounding conductors form a hybrid grounding plug, and an additional contact sleeve for a grounding pin of a French plug is arranged on the hybrid grounding plug.

[0008] As a further improvement of the present application, the movable rack is fixedly connected with the Euro plug pin assembly.

[0009] As a further improvement of the present application, the Euro plug pin assembly further comprises a transverse connecting block, and the two pins are vertically arranged at the lower end of the transverse connecting block, wherein the movable rack is fixedly connected with the transverse connecting block.

[0010] As a further improvement of the present application, the gear is fixed on the Euro plug sleeve.

[0011] As a further improvement of the present application, the gear is fixed on the Euro plug sleeve by a screw.

[0012] As a further improvement of the present application, the shell comprises a base and an upper cover matched with the base, wherein an opening is formed on the base for the Euro plug sleeve and the Euro plug pin assembly to pass through.

[0013] As a further improvement of the present application, the fixed rack is integrally formed on the base or is fixedly arranged on the base by a connecting frame.

[0014] As a further improvement of the present application, the fixed rack is fixedly arranged on the upper cover.

[0015] As a further improvement of the present application, a locking structure is arranged between the push handle and the movable rack, which comprises at least one locking protrusion arranged on the push handle and at least one locking slot formed on the movable rack for the locking protrusion to be clamped.

[0016] As a further improvement of the present application, the push handle is movably connected with the Euro plug sleeve by a positioning seat, a positioning sliding hole and a spring mounting slot are respectively formed on the positioning seat, a positioning strip movably arranged in the positioning sliding hole and a push block movably arranged in the spring mounting slot are formed on the push handle, and a spring is arranged in the spring mounting slot.

[0017] As a further improvement of the present application, the push handle mainly comprises a connecting block arranged in the shell and a push part connected with the end of the connecting block and passing through the shell, wherein the connecting block is movably connected with the Euro plug sleeve by the positioning seat, the locking protrusion, the positioning strip and the push block are arranged on the connecting block, and a strip-shaped hole is formed on the shell for the push part to move up and down.

[0018] As a further improvement of the present application, at least one guide rod is arranged in the shell, and the connecting block and the positioning seat are sleeved on the guide rod.

[0019] The beneficial effects of the present application are: by adding the combination of the fixed rack, gear and movable rack engaged with each other, as long as the push handle is pushed downward to move a first stroke, the European plug sleeve and the European plug pin assembly can obtain a first stroke of downward movement, that is, the European plug sleeve and the European plug pin assembly are synchronously pushed out of the shell; at the same time, the European plug pin assembly can also obtain a second stroke of downward movement relative to the European plug sleeve, so that the lower end of the European plug pin assembly penetrates out of the European plug sleeve, that is, the push handle moves a stroke, and the European plug pin assembly can obtain two strokes. Therefore, by pushing out the European plug sleeve and the European plug pin assembly, the stroke of the push handle can be set very short, so that the space occupied by the push handle is reduced, the internal space of the product is saved, the product volume is reduced, and the miniaturization of the entire product is facilitated.

[0020] The above is a summary of the technical scheme of the application, which will be further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole exploded view of the first embodiment;

[0022] Figure 2 It is an internal structure schematic view of the European plug sleeve and the European plug pin assembly in the first embodiment in the state of not being pushed out;

[0023] Figure 3 It is a structure schematic view of the connecting block of the push handle on the guide rod in the first embodiment;

[0024] Figure 4 It is a structure schematic view of the combination of the movable rack, gear and fixed rack when the European plug sleeve and the European plug pin assembly are in the state of not being pushed out in the first embodiment;

[0025] Figure 5 It is a whole external structure schematic view of the European plug sleeve and the European plug pin assembly in the state of not being pushed out in the first embodiment;

[0026] Figure 6 It is an internal structure schematic view of the European plug sleeve and the European plug pin assembly in the state of being pushed out in the first embodiment;

[0027] Figure 7 It is a structure schematic view of the combination of the movable rack, gear and fixed rack when the European plug sleeve and the European plug pin assembly are in the state of being pushed out in the first embodiment;

[0028] Figure 8 It is a whole external structure schematic view of the European plug sleeve and the European plug pin assembly in the state of being pushed out in the first embodiment;

[0029] Figure 9Fig. 1 is a schematic view of the structure of the mixed grounding plug of Example 1;

[0030] Figure 10 Fig. 2 is a schematic view of the structure of the locking structure arranged on the push handle and the movable rack of Example 2;

[0031] Figure 11 Fig. 3 is an exploded schematic view of the push handle, the movable rack and the positioning seat of Example 2;

[0032] Figure 12 Fig. 4 is a schematic view of the structure of the push handle of Example 2. DETAILED DESCRIPTION

[0033] In order to further clarify the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments of the present application are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0034] Example 1:

[0035] Please refer to Figure 1 , Figure 2 and Figure 4 , the present embodiment provides a telescopic mechanism of a power converter European plug with grounding pins, which comprises a shell 1, a push handle 2 arranged on the shell 1, a European plug sleeve 3 arranged in the shell 1 and movably connected with the push handle 2, and a European plug pin assembly 4 arranged in the shell 1. The telescopic mechanism of the power converter European plug with grounding pins of the present embodiment further comprises a fixed rack 5 arranged on the shell 1 and extending into the European plug sleeve 3, a movable rack 6 connected with the European plug pin assembly 4, and a gear 7 arranged on the European plug sleeve 3 and engaged with the fixed rack 5 and the movable rack 6, respectively. As shown in Figure 2 , Figure 4 and Figure 5 , the European plug sleeve 3 and the European plug pin assembly 4 are in an unpushed-out state, and when the push handle 2 is pushed downward, the push handle 2 drives the European plug sleeve 3 to move downward, and the gear 7 on the European plug sleeve 3 moves downward as well. Since the fixed rack 5 is fixed on the shell 1, the gear 7 that is constantly moving downward will roll along the fixed rack 5, for example, in the direction of the arrow A shown in Figure 2In this process, since the gear 7 is in meshing connection with the movable rack 6, when the gear 7 continuously moves downwards with the European plug sleeve 3 and penetrates out of the shell 1, the movable rack 6 will also move downwards synchronously, and then the movable rack 6 drives the European plug pin assembly 4 to move downwards synchronously for a first stroke, so that the European plug pin assembly 4 penetrates out of the shell 1 synchronously with the European plug sleeve 3; meanwhile, when the gear 7 rotates due to the existence of the fixed rack 5, the gear 7 will synchronously push the movable rack 6 which is in meshing connection with the gear 7 downwards, and then the movable rack 6 drives the European plug pin assembly 4 to move downwards synchronously for a second stroke, so that the European plug pin assembly 4 moves downwards for the second stroke relative to the European plug sleeve 3, and then the lower end of the European plug pin assembly 4 penetrates out of the European plug sleeve 3, as shown in Figures 6 to 8

[0036] Therefore, as long as the push handle 2 is pushed downwards for a first stroke, the European plug sleeve 3 and the European plug pin assembly 4 can both obtain a first stroke downwards, i.e. the European plug sleeve 3 and the European plug pin assembly 4 are synchronously pushed out of the shell 1; meanwhile, the European plug pin assembly 4 can also obtain a second stroke downwards relative to the European plug sleeve 3, so that the lower end of the European plug pin assembly 4 penetrates out of the European plug sleeve 3, i.e. the European plug pin assembly 4 can obtain two strokes. It can be known that, as long as the European plug sleeve 3 and the European plug pin assembly 4 are pushed out, the stroke of the push handle 2 can be set to be very short, so that the space occupied by the push handle 2 is reduced, the internal space of the product is saved, the product volume is reduced, and the miniaturization of the whole product is facilitated.

[0037] In this embodiment, as shown in Figure 5 and Figure 9 The European plug pin assembly 4 includes two pins 42, two ground conductors (31, 32) are arranged on the European plug sleeve 3, the two pins 42 and the two ground conductors (31, 32) combine to form a hybrid ground plug, and an additional contact sleeve 33 for a ground pin of a French plug is arranged on the hybrid ground plug. In this embodiment, the meshing structure composed of the fixed rack 5, the movable rack 6 and the gear 7 can realize the telescopic operation of the pins in the hybrid ground plug.

[0038] In this embodiment, the movable rack 6 is fixedly connected with the European plug pin assembly 4. Specifically, as shown in Figure 2 The European plug pin assembly 4 further includes a transverse connecting block 41, and the two pins 42 are vertically arranged at the lower end of the transverse connecting block 41, wherein the movable rack 6 is fixedly connected with the transverse connecting block 41. Therefore, the movable rack 6 and the transverse connecting block 41 are connected as a whole, and when the movable rack 6 moves downwards, the European plug pin assembly 4 will move downwards synchronously. ​

[0039] In the embodiment, the gear 7 is fixed on the European plug socket 3. Specifically, as shown in Figure 2 the gear 7 is fixed on the European plug socket 3 by the screw 71. Of course, the gear 7 can also be fixed on the European plug socket 3 by other structures or other ways. Therefore, the gear 7 is connected with the European plug socket 3 as a whole, and when the European plug socket 3 moves downward, the gear 7 will move downward synchronously.

[0040] In the embodiment, as shown in Figure 1 the shell 1 comprises a base 11 and an upper cover 12 matched with the base 11. An opening is formed on the base 11 for the European plug socket 3 and the European plug pin assembly 4 to pass through. When the European plug socket 3 and the European plug pin assembly 4 are not pushed out, the lower end surface of the European plug socket 3 and the European plug pin assembly 4 is flush with the opening, as shown in Figure 5 . After the European plug socket 3 and the European plug pin assembly 4 are pushed out, the lower part of the European plug socket 3 and the European plug pin assembly 4 passes through the opening and protrudes out of the lower end surface of the base 11, as shown in Figure 8 .

[0041] For the specific installation of the fixed rack 5, the fixed rack 5 can be integrally formed on the base 11, or the fixed rack 5 can be longitudinally fixed on the base 11 by a connecting frame 51, so that the gear 7 can engage with the fixed rack 5 and the gear 7 can roll up and down along the fixed rack 5, as shown in Figure 2 . The specific structure and form of the connecting frame 51 can be set according to specific needs, as shown in Figure 2 and Figure 6 . Of course, the fixed rack 5 can also be longitudinally fixed on the upper cover 12, as long as the fixed rack 5 can extend to the side of the gear 7 and engage with the gear 7, and the gear 7 can roll up and down along the fixed rack 5.

[0042] The telescopic mechanism provided in the embodiment is particularly suitable for use in a conversion plug, and can realize the function of synchronously pushing out the European plug socket 3 and the European plug pin assembly 4 in the plug. In specific operation, the European plug socket 3 and the European plug pin assembly 4 can be pushed out by pushing the handle 2 downward, and the European plug socket 3 and the European plug pin assembly 4 can be retracted by pushing the handle 2 upward. The other structures and working principles inside the conversion plug are the same as those of conventional conversion plugs in the art.

[0043] Preferably, the telescopic mechanism provided in the embodiment is particularly suitable for use in European conversion plugs, such as German or French conversion plugs, and is particularly suitable for use in high-power electrical appliances below 16A.

[0044] Embodiment Two:

[0045] The main difference between the present embodiment and Embodiment One is that, as shown in Figures 10 to 12 The locking structure 9 is provided between the push handle 2 and the movable rack 6, and includes at least one locking protrusion 91 provided on the push handle 2 and at least one locking slot 92 formed on the movable rack 6 and into which the locking protrusion 91 is clamped. After the two prongs 42 of the European plug prong assembly 4 and the European plug sleeve 3 are extended out of the shell 1 or are retracted into the shell 1, the locking protrusion 91 of the locking structure 9 is clamped into the locking slot 92, thereby locking the movable rack 6 and the European plug prong assembly 4 as a whole, which facilitates the use of the product. For example, after the two prongs 42 of the European plug prong assembly 4 and the European plug sleeve 3 are extended out of the shell 1, the locking protrusion 91 of the locking structure 9 is clamped into the locking slot 92, so that the movable rack 6 and the European plug prong assembly 4 are locked as a whole and cannot be retracted by themselves, which facilitates the use of the product. Only by pushing the push handle 2 to make the locking protrusion 91 move away from the locking slot 92 and be unlocked can the two prongs 42 of the European plug prong assembly 4 and the European plug sleeve 3 be retracted into the shell 1. Similarly, after the two prongs 42 of the European plug prong assembly 4 and the European plug sleeve 3 are retracted into the shell 1, the locking protrusion 91 of the locking structure 9 is clamped into the locking slot 92, so that the movable rack 6 and the European plug prong assembly 4 are locked as a whole and the two prongs 42 and the European plug sleeve 3 cannot be extended by themselves. Only by pushing the push handle 2 to make the locking protrusion 91 move away from the locking slot 92 and be unlocked can the two prongs 42 and the European plug sleeve 3 be pushed out of the shell 1.

[0046] Specifically, the number of the locking protrusions 91 is two, and a clearance slot 93 is formed between the two locking protrusions 91. Correspondingly, the number of the locking slots 92 is also two, and a longitudinal sliding slot 94 extending longitudinally is formed on the movable rack 6, and the two locking slots 92 are located on both sides of the longitudinal sliding slot 94, as shown in Figure 11 and Figure 12 In the locked state, the two locking protrusions 91 are clamped into the two locking slots 92, and in the contact-locked state, one of the locking protrusions 91 is located in the longitudinal sliding slot 94, and the other locking protrusion 91 also moves to the side edge of the movable rack 6.

[0047] In the embodiment, the push handle 2 is movably connected with the European plug sleeve 3 through the positioning seat 30. The positioning seat 30 is provided with a positioning sliding hole 301 and a spring mounting groove 302. The push handle 2 is provided with a positioning strip 211 slidingly arranged in the positioning sliding hole 301 and a push block 212 movably arranged in the spring mounting groove 302. The spring mounting groove 302 is provided with a spring 303. The push block 212 is used to directly push the spring 303. When the spring 303 is in a natural extension and contraction state, the push handle 2 is slid on the positioning seat 30 to the state that the locking protrusion 91 of the locking structure 9 is clamped into the locking clamping groove 92, so that the movable rack 6 and the European plug pin assembly 4 are integrally locked. When it is needed to release the locking, the push handle 2 is pushed into the shell 1, so that the locking protrusion 91 is separated from the locking clamping groove 92, the locking is released, and the push handle 2 is pushed up and down to push out and retract the two pins 42 of the European plug pin assembly 4 and the European plug sleeve 3. At the same time, the spring 303 is compressed. After the push handle 2 is pushed up and down to the position, the force acting on the push handle 2 is released. Under the elastic restoring force of the spring 303, the push handle 2 is moved outward and reset. The push handle 2 is slid on the positioning seat 30. The locking protrusion 91 of the locking structure 9 is clamped into the locking clamping groove 92 again, so that the locking function is realized.

[0048] In the embodiment, as shown in Figure 2 , Figure 10 and Figure 12 , the push handle 2 mainly comprises a linkage block 21 arranged in the shell 1 and a push part 22 connected to the end of the linkage block 21 and extending out of the shell 1. The linkage block 21 is movably connected with the European plug sleeve 3 through the positioning seat 30. The locking protrusion 91, the positioning strip 211 and the push block 212 are arranged on the linkage block 21. Therefore, when the linkage block 21 of the push handle 2 moves downward, the European plug sleeve 3 is synchronously moved downward. At the same time, as shown in Figure 5 , the shell 1 is provided with a strip-shaped hole 10 for the up and down movement of the push part 22. The strip-shaped hole 10 provides a vertical track for the up and down movement of the push part 22.

[0049] In order to improve the vertical stability of the up and down movement of the push handle 2, at least one guide rod 8 is arranged in the shell 1. The linkage block 21 and the positioning seat 30 are arranged on the guide rod 8, as shown in Figure 3 and Figure 10 . When the push handle 2 moves up and down, the linkage block 21 can move vertically up and down along the guide rods 8 without displacement and bending.

[0050] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application. Therefore, other structures obtained by using the same or similar technical features as the above-mentioned embodiments of the present application are within the protection scope of the present application.

Claims

1. A telescopic mechanism for a European-style plug of a power converter with a grounding pin, comprising a housing, a push handle disposed on the housing, a European-style plug sleeve disposed within the housing and movably connected to the push handle, and a European-style plug pin assembly disposed within the housing, characterized in that, The fixed rack is arranged on the shell and extends into the socket of the European plug, the movable rack is connected with the European plug pin assembly, the gear is fixed on the socket of the European plug, the fixed rack and the movable rack are provided with teeth, and the gear is engaged with the fixed rack and the movable rack through the teeth.

2. The retractable mechanism of a power converter Europlug with grounding prong according to claim 1, wherein, Two grounding conductors are arranged on the socket of the European plug, and the two pins and the two grounding conductors form a hybrid grounding plug, and an additional contact sleeve is arranged on the hybrid grounding plug for the grounding pin of a French plug.

3. The retractable mechanism of a power converter Europlug with grounding prong according to claim 2, wherein, The movable rack is fixedly connected with the European plug pin assembly.

4. The retractable mechanism of a power converter Europlug with grounding prong according to claim 3, wherein, The European plug pin assembly further comprises a transverse connecting block, and the two pins are vertically arranged at the lower end of the transverse connecting block, wherein the movable rack is fixedly connected with the transverse connecting block.

5. The retractable mechanism of a grounded pin power converter Europlug according to claim 1, wherein, The gear is fixed on the socket of the European plug through a screw.

6. The retractable mechanism for a grounded prong power converter Europlug according to claim 1, wherein, The shell comprises a base and an upper cover matched with the base, and an opening is formed in the base for the socket of the European plug and the pin assembly to pass through.

7. The retractable mechanism of a power converter Europlug with grounding prong according to claim 6, wherein, The fixed rack is integrally formed on the base or is fixedly arranged on the base through a connecting frame.

8. The retractable mechanism of a power converter Europlug with grounding prong according to claim 6, wherein, The fixed rack is fixed on the upper cover in the longitudinal direction.

9. The retractable mechanism of a power converter Europlug with grounding prong according to any one of claims 1 to 8, characterized in that, A locking structure is arranged between the push handle and the movable rack, and the locking structure comprises at least one locking lug arranged on the push handle and at least one locking slot formed on the movable rack and used for clamping the locking lug.

10. The retractable mechanism of a power converter Europlug with grounding prong according to claim 9, wherein, The push handle is movably connected with the socket of the European plug through a positioning seat, a positioning sliding hole and a spring mounting groove are formed in the positioning seat, a positioning strip movably arranged in the positioning sliding hole and a push block movably arranged in the spring mounting groove are formed in the push handle, and a spring is arranged in the spring mounting groove.

11. The retracting mechanism of a power converter Europlug with grounding prongs according to claim 10, wherein, The push handle mainly comprises a connecting block arranged in the shell and a push part connected with the end of the connecting block and extending out of the shell, wherein the connecting block is movably connected with the socket of the European plug through the positioning seat, the locking lug, the positioning strip and the push block are arranged on the connecting block, and a strip-shaped hole is formed in the shell for the push part to move up and down.

12. The retracting mechanism of a power converter Europlug with grounding prongs according to claim 11, wherein, At least one guide rod is arranged in the shell, and the connecting block and the positioning seat are sleeved on the guide rod.

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