TW201817101A - Reisestecker - Google Patents

Abstract

The invention relates to a travel plug (11) for establishing an electrical connection between plugs and sockets complying with the standards of different countries, comprising a housing (13) having at least one socket for inserting an electrical plug and at least one plug (17) complying with a country standard, which can be retracted and extended from the housing (13) and electrically connected to the socket, said plug (17) being linearly displaceable by means of an adjusting part, which projects from the housing (13) and is mechanically connected to the plug (17). The travel plug also comprises a mechanical gear (25), which connects the adjusting part to the displaceable plug (17) and transmits the path of the adjusting part to the linear displacement path of the plug (17).

Description

   Travel plug   

The invention relates to a travelling plug for establishing an electrical connection between plugs and sockets of different national standards.

A travel plug with a housing is known from the prior art, having at least one socket for a standard plug, and several plugs designed to be inserted into sockets of other standards. These plugs can be extended and retracted from the housing, respectively. This extension or retraction mechanism employs an embodiment such that only a single plug can always be extended. That is, to extend a plug, all other plugs must be retracted. If the plug consists of not only several pins, but also a holder, such a plug is extended in two stages. The holder is necessary, for example, for inserting a travel plug into a so-called "grounded" socket. Therefore, in order to extend the plug with the holder, it is necessary to adopt a different route from the plug with only the pin. Use the slider to extend and retract the plug. The sliding distance of a slider for a plug with a holder is substantially twice the sliding distance of a plug that only has to protrude from the pin. Therefore, the housing must have a correspondingly large height in order to implement an extended sliding distance for a plug having a retaining member. Therefore, a disadvantage of such a travel plug is that it is relatively large and bulky, and it is difficult to provide an extended sliding distance.

DE 10 20011 014920 A1, GB 2 484 145 A and EP 2 822 110 A1 describe such typical travel plugs as described above. As shown in the drawings of these patent applications, the height of the housing at least corresponds to the moving distance corresponding to the sum of the height of the holder and the height of the latch. As described above, the moving distance of the plug with the holder is substantially twice the sliding distance of the plug that only needs to protrude from the plug. Therefore, all three types of travel plugs disclosed have the following disadvantages: These travel plugs must have a relatively large height in order to make the plug with the retaining member and the latch fully extend.

WO 2010/057399 A1 describes a travel plug, the height of which is only equivalent to the height of the holder. This holder can be slid out of the housing of the travel plug and moved back into the housing. In order to achieve such a small height of the travel plug compared with the above-mentioned travel plug, the slider is not provided on the housing, but is provided on the holder, so that the latch is moved out of the holder and into the holder. The disadvantage of this type of travel plug is that it is only designed for 2-phase plugs. In addition, the holder must first be slid out of the housing so that the slider can be accessed. You can then use the slider to remove the latch from the holder. This operation method is tedious for users and is not clear at a glance.

In view of the foregoing shortcomings of the prior art, an object of the present invention is to further develop a travel plug of the same type, which has a reduced height and can still achieve extension and retraction of a plug with a holder.

For travelling plugs used to establish an electrical connection between plugs and sockets of different national standards, the conventional solution is to provide a mechanical transmission that connects the adjustment piece with the movable plug and passes the route of the adjustment piece to The linear movement of the plug.

The plug includes a holder that can be extended from the housing and at least two pins that are received in the holder and can be extended from the holder. In this way, the so-called European standard plug, that is, a three-phase plug, can be matched with the Italian and Swiss sockets. The holder and the latch must be extended, but the height of the housing need not be at least the same as the sum of the length of the holder and the latch. The height of the housing can only be slightly greater than the length of the holder due to the mechanical transmission.

In the aspect of a travel plug, the solution to achieve the above-mentioned object of the present invention is that the mechanical transmission is realized by a hinged chain including at least two crossed rod portions. For the required extension length, in the case where the hinge chain has only two rod portions in the retracted state, the hinge chain must have the same width as the length of the rod portion. As a result, the width has also been increased with the extended length. Therefore, it is preferable to provide at least two pairs of crossed rod portions. The function of the mechanical transmission device is that the plug passes through a moving route that is greater than the height of the housing by manipulating the adjusting member. This allows the housing to be built low, and nevertheless the plug can be fully extended. A gear that can be rotated from the outside can also be used as a mechanical transmission device. The gear is fixed on the holder and interacts with the rack on the housing and the latch.

The feature of the present invention is preferably that the hinge link is hinged on the housing, the holder and the latches. In this way, the extension or retraction movement of the retaining member can be transmitted to the latch through the hinge chain, so that the moving path of the latch is greater than that of the retaining member. The hinge chain is preferably constructed such that the movement path of the latches is related to the movement path of the holder and is at least twice the movement path of the holder. Thereby, when the holder is extended, the latch is also fully extended, and when the holder is retracted into the plug, the latch is completely retracted into the holder.

The gear ratio between the movement path of the holder and the movement paths of the latches is advantageously at least 1: 2. According to the standard, the length of the latch and the holder must be substantially the same (19 mm), so a 1: 2 ratio is preferably selected. Among them, the number of hinge pairs is selected so that the hinged chain reaches a length in the extended state, in which the holder and the latch can be fully extended. But the hinged chain should be as low and narrow as possible in the retracted state.

In another preferred embodiment, the articulated chain includes at least one first and second rod portion hingedly connected to the intersection, the rod portions are hinged on the housing with their first ends, and the second The ends are hinged on the pins and hinged on the holders at their intersections. This embodiment with two rods requires horizontal guide slides on the housing and on the latch holding device for the ends of the pair of rods to slide. The number of rod pairs is preferably optimized so that, on the one hand, the length of the hinged chain reaching 38 mm, on the other hand, the hinged chain is as low and narrow as possible in the retracted state. Thus, the preset width of the casing is fully utilized.

In a particularly preferred embodiment of the present invention, the hinge comprises first and second levers hingedly connected at the intersection, and the levers are hingedly connected to the third and fourth or fifth and fifth levers with their ends. On the six poles and at the intersections with the holder articulated, wherein the third and fourth poles are hingedly connected to the housing with their free ends, and the fifth and sixth poles are free with their The ends are hingedly connected to these pins. The advantage of the combination of three articulated rod pairs is that it reaches the length of the extended hinge chain required to fully extend the pin, and the retracted hinge chain can be folded narrowly and lower together. The retracted hinge can be placed in the housing because the width of the housing is sufficient to accommodate the retracted hinge having a certain width. The housing only needs to be increased by three times the height of the hinge, so the height of the housing is less than the height of the housing in the prior art by up to 40%. A hinged link having more than three hinge pairs results in a further reduction in width in the retracted position, but at the cost of an increased height of the retracted hinged link.

Preferably, the adjusting member is a slider connected to the holding member. The slider can be used to retract and extend the holder. The function of the hinge is to automatically retract and extend the bolt through the movement of the holder. There is no need to use another slider for this purpose, or existing sliders do not require additional movement for this purpose.

The plug advantageously comprises a third ground pin which is movable at right angles to its holder with respect to its longitudinal axis. Due to the adjustability of the third ground pin, the plug is applicable to the Swiss plug standard in the case where the ground pin is arranged non-centrally. If the ground pin is moved to the center of the end side of the holder, the travel plug can be inserted into the Italian socket. The movability of the ground pin is preferably achieved by having a flat portion at the end held on the holder. The leveling portion is guided in a movable manner in a groove of the holder.

In another particularly preferred embodiment, the latches are guided on the holder by a guide device so as to remain stable relative to the holder. Thereby, the latch can be stably held in the holder even in the extended state. Thereby, undesired movement or shaking of the latch in the holder is reliably prevented. The guiding device may adopt an embodiment in which the latches are held on the holder in a form-fitting manner and are movable along the rail at a height inside the holder.

Preferably, the ends of the latches facing the holder are held on a slide, and the slide can move linearly relative to the holder. The carriage can be held on the track and slide along the track. The track can be fixed to or built on the inner sheath of the holder.

In another particularly preferred embodiment of the present invention, at least one gear is rotatably held on the carriage, and the gear can roll along a rack provided or constructed on the holder. The slide seat is stably held in the holder at each moving position due to the gear that interacts with the rack, and can still move along the longitudinal axis of the holder with less resistance.

A shaft body is beneficially rotatably held on the slide seat, and first and second gears are fixed or constructed in a rotation-resistant manner on both ends thereof, and the first and second gears can be respectively Roll on the first and second racks provided or constructed on the holder. The first and second gears can hold the slide seat on the holder symmetrically. The symmetrical arrangement of the gears on the end of the shaft realizes the dual guidance of the slide, so that the slide can be guided in the holder particularly stably and still can move with less frictional resistance.

11‧‧‧ Travel Plug

13‧‧‧shell

15a, 15b, 15c‧‧‧Socket

17‧‧‧Plug

19‧‧‧ retainer

21a, 21b ‧‧‧ Bolt

23‧‧‧ ground pin

25‧‧‧ hinged chain

27a, 27b ‧‧‧ first and second clubs

29‧‧‧ intersection

31a, 31b ‧‧‧ third and fourth clubs

32‧‧‧first connector

33a, 33b ‧‧‧ fifth and sixth clubs

35‧‧‧ holding plate

37a, 37b‧‧‧Second connector

39‧‧‧ Gap

41‧‧‧ slider

43‧‧‧Guide

45‧‧‧slide

47‧‧‧ Shaft

49a, 49b ‧‧‧ first and second gears

51a, 51b ‧‧‧ rack

Further advantages and features will be described below based on the description of the embodiment of the invention shown in the schematic diagram. A view not drawn to scale: Figure 1 is a top view of the travel plug of the present invention; Figure 2 is a side view of the plug in the retracted position along the section line II-II; and Figure 3 is another side view of the retracted plug; Figure 4 is another top view of the travel plug, the plug is in the extended position; Figure 5 is a side view of the plug in the extended position along the section line III-III; Figure 6 is the other side of the extended plug View; FIG. 7 is a side view of another embodiment of the plug with an extension of the present invention; FIG. 8 is a side view along a section line VIII-VIII in FIG. 7; and FIG. 9 is a section line along FIG. 8 Side view of IX-IX.

1 to 6 illustrate a travel plug, which is indicated by a reference numeral 11 in its entirety. The travel plug is used to connect an electric plug of a specific national standard with an electric socket of another national standard. That is, here is an adapter between a plug and a socket that are not matched. The travel plug 11 includes a case 13. The housing 13 is provided with a plurality of sockets 15a, 15b, and 15c for inserting plugs.

The sockets 15a, 15b, 15c are electrically connected to the plug 17. The plug 17 includes a holder 19, two pins 21 a and 21 b received in the holder 19, and an optional ground pin 23. The holder 19 may protrude from the housing 13 along its longitudinal axis. The latches 21 and 23 can protrude from the holder 19. As shown, the plug 17 is suitable for sockets in Italy and Switzerland. If the ground pin 23 is not provided, the plug 17 can be used as a so-called two-phase "European standard plug".

The height of the housing 13 in the prior art is at least equivalent to the sum of the movement path of the holder 19 from the housing 13 and the movement paths of the latches 21 and 23 from the holder 19. Therefore, the height of the housing 13 in the prior art travel plug is at least 40 mm. The length of the holder 19 and the pins 21 and 23 cannot be reduced because these lengths are standardized. Therefore, the conventional travel plug is relatively large, which is inconsistent with the traveler's need for a travel plug as compact as possible.

In order to reduce the height of the housing, the pins 21, 23 are extended from the holder 19 together with a hinge 25 known as a "Nurnberger Schcre". The hinge chain 25 includes first and second lever portions 27 a and 27 b which are hingedly connected together at the intersection 29. The first and second lever portions 27a, 27b are also hingedly connected to the holder 19 at this intersection.

The third or fourth lever portions 31a, 31b are hinged to the upper ends of the first and second lever portions 27a, 27b with their lower ends. The upper ends of the third and fourth lever portions 31 a and 31 b are hingedly connected to each other through the first joint 32 and are hingedly connected to the housing 13. The length of the third and fourth lever portions 31a and 31b is substantially equal to half the length of the first and second lever portions 27a and 27b.

The fifth or sixth lever portions 33a, 33b are hinged on the lower ends of the first and second lever portions 27a, 27b with their upper ends. The lower ends of the fifth and sixth lever portions 33a and 33b are hingedly connected to the holding plate 35 through the second joints 37a and 37b. The holding plate 35 carries the latches 21 and 23 on one side. The lengths of the fifth and sixth lever portions 33a, 33b are also substantially equivalent to half the length of the first and second lever portions 27a, 27b.

The length of the rod portions 27, 31, 33 is designed so that the hinge chain 25 can be folded to a small height. The height of the hinge chain 25 in the folded state is equivalent to the sum of the widths of the rod portions 27, 31, and 33. The rods are also designed in such a way that the length of the hinged chain 25 in the extended state exceeds the sum of the length of the holder 19 and the length of the pins 21, 23. In this way, the holder 19 and the pins 21 and 23 can be fully extended through the hinge 25.

The ground pin 23 is movable on the holding plate 35 at a right angle along the slit 39. In this way, the ground pin 23 can be adjusted between different positions so that it conforms to the Italian standard or the Swiss standard.

A guide 43 shown in FIGS. 8 and 9 is provided between the holder 19 and the pins 21 a and 21 b. The bolts 21 a and 21 b are fixedly connected to the slider 45. The slider 45 slides along the inner wall of the holder 19. The outer dimensions of the slide base are designed so that the slide base 45 can move smoothly and only up and down along the inner wall of the holder. The stability of the slider 45 and the latches 21 a and 21 b relative to the holder 19 is improved by the guide device 43.

The guide device 43 includes a shaft body 47 rotatably held on the carriage 45. The first and second gears 49a, 49b are arranged or constructed on the ends of the shaft body 47 and are fixedly connected to the shaft body 47. When the latches 21a, 21b, 23 are extended from the holder 19 and retracted into the holder 19, the gears 49a, 49b are rolled along the first and second racks 51a, 51b. Thereby, the latches 21a, 21b, 23 are kept relatively stable with respect to the holder 19 at each position. The rack is arranged or shaped on the inner back side of the holder 19. The guide device 43 allows the slide seat 45 to be accommodated in the holder 19 without gap and smoothly, and still be able to move along the height of the holder approximately unhindered.

The extending or retracting mechanism works as follows: A slider 41 protruding from the housing 13 through a gap is fixed to the holder 19. By removing the holder 19 from the housing 13 by the slider 41, the pins 21 and 23 are also extended from the holder 19 because the pins are connected to the holder through the hinge 25. The holding plate 35 and the latches 21, 23 are forcibly guided accordingly by articulating the hinge chain 25 preferably to the housing 13, the holder 19 and the holding plate 35. For the specific moving route that the holder 19 passes, the hinge chain 25 is extended by twice the length of the moving route. With this, even though the slider 41 is extended only by the length of the holder 19, when the holder is fully extended, the latches 21 and 23 are automatically fully extended. In this way, the height of the housing 13 can be reduced to a level corresponding to the sum of the length of the holder 19 and the height of the hinge chain 25 in the retracted state.

Claims (12)

    A travel plug (11) for establishing an electrical connection between plugs and sockets of different national standards, comprising a housing (13), the housing having at least one socket (15) for inserting an electric plug, one At least one national standard plug (17) that can be retracted and extended from the casing (13) and is electrically connected to the socket (15), the plug (17) can be projected from the casing (13) and communicate with The adjustment piece (41) mechanically connected by the plug (17) moves linearly, and the mechanical transmission device (25) connects the adjustment piece (41) with the movable plug (17) and the adjustment piece (41) ) Route to the linear movement route of the plug (17), wherein the plug (17) includes a holder (19) that can protrude from the housing (13), and at least two received in the holder (19) A latch (21a, 21b) that can be extended from the holder (19), characterized in that the mechanical transmission passes through a hinge chain (25) including at least two crossed rod portions (27a, 27b) And achieve.         For example, the travel plug of claim 1 is characterized in that the hinge (25) is hinged on the housing (13), the holder (19) and the pins (21a, 21b).         For example, the travelling plug of the scope of patent application No. 1 or 2 is characterized in that the hinge (25) is constructed so that the movement route of the pins (21a, 21b) and the movement route of the holder (19) Relevant and at least twice the moving path of the holder (19).         For example, the travel plug according to any one of claims 1 to 3, characterized in that the transmission ratio between the moving route (19) of the holder and the moving route of the pins (21a, 21b) is at least :2.         The travel plug according to any one of the aforementioned patent applications, characterized in that the hinge (25) includes at least one first and second lever portion (27a, 27b) hingedly connected to the intersection (29), The rods are hinged to the housing (13) with their first ends, hinged to the pins (21a, 21b) with their second ends, and hinged to the holder at their intersections (29). (19) on.         For example, the travel plug according to any one of claims 1 to 5, wherein the hinge (25) includes first and second levers (27a, 27b) hingedly connected to the intersection (29). ), The rods are hingedly connected to the third and fourth or fifth and sixth rods (31a, 31b, 33a, 33b) with their ends, and at the intersection (29) with the holder ( 19) Articulated connection, wherein the third and fourth rod portions (31a, 31b) are hingedly connected to the housing (13) with their free ends, and the fifth and sixth rod portions (33a, 33b) are free with their The ends are hingedly connected to the pins (21a, 21b).         The travel plug according to any one of the aforementioned patent applications, wherein the adjusting member is a slider (41) connected to the holding member (19).         The travel plug according to any one of the aforementioned patent applications, characterized in that the plug includes a third ground pin (23), which can move relative to the holder (19) at a right angle to its longitudinal axis.         The travelling plug according to any one of the aforementioned patent applications, characterized in that the pins (21a, 21b, 23) are guided on the holder (19) by a guide device (43) so as to be relatively opposed The holder (19) remains stable.         The travelling plug according to any one of the aforementioned patent applications, characterized in that the ends of the pins (21a, 21b, 23) facing the holder (19) are held on a slide (45), which It can be moved linearly with respect to the holder (19).         For example, the travel plug of claim 10 is characterized in that at least one gear (49) is rotatably held on the slide seat (45), and the gear can be disposed along or constructed on the holder ( The rack (51) on 19) rolls.         For example, the travel plug of the scope of application for patent No. 11 is characterized in that a shaft body (47) is rotatably held on the slide seat (45), and is fixed in an anti-rotation manner on both ends or The first and second gears (49a, 49b) are constructed, and the first and second gears (49a, 49b) can be respectively provided on the first and second teeth provided on the retaining member (19). Scroll on the bar (51a, 51b).