Power converter plug telescopic mechanism
The two-stage telescopic structure in power converters addresses the bulkiness issue by housing the plug and socket bodies within each other, enabling precise and smooth operation of the prongs, enhancing portability and usability.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- GUANGDONG BESTRAVEL PRECISION MANUFACTURING CO LTD
- Filing Date
- 2026-01-20
- Publication Date
- 2026-07-07
AI Technical Summary
Existing power converters with extendable prongs become bulky and inconvenient to carry due to the added mechanism for extending and retracting the prongs, leading to increased height and size.
A two-stage telescopic structure is implemented, housing the plug assembly inside the socket body and the socket body inside the housing, with a precise operating mechanism that slides along vertically aligned slots and chutes to extend and retract the prongs, featuring a push handle and reset members for stable operation.
The solution effectively shortens the overall length of the power converter, improving portability and ease of use by ensuring precise and smooth operation of the prongs, preventing shifting during use, and reducing the overall size for convenient travel.
Smart Images
Figure 0003256452000001_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of power converters, and particularly to the plug telescopic mechanism of power converters.
Background Art
[0002] Since plugs and sockets vary from country to country, there is a compatibility problem. When it is necessary to insert a plug into an incompatible socket, a power adapter is required. A power adapter is a conversion tool. When in use, the adapter is inserted into the target socket, and then the target plug is inserted into the corresponding socket of the adapter. The power adapter greatly improves the convenience when traveling abroad and eliminates the worry that the power of electronic devices cannot be turned on due to the incompatibility between the plug of the electronic device and the local power socket.
[0003] However, a general power converter houses the prong inside the case and extends it only when necessary, thereby preventing damage to the prong exposed outside the case and reducing the size of the entire power converter. However, since an operating mechanism for extending and retracting the prong is added, the extended part becomes longer, the height of the entire power converter increases, and it becomes bulky and inconvenient to carry.
Summary of the Invention
Problems to be Solved by the Invention
[0004] This invention is made to solve the above-mentioned drawbacks, and an object thereof is to provide a plug telescopic mechanism for a power conversion device. By housing the plug assembly inside the socket body and housing the socket body inside the housing, a two-stage telescopic structure is formed, effectively shortening the overall length of the telescopic plug and reducing the volume of the entire power conversion device, thereby facilitating carrying and use during travel.
Means for Solving the Problems
[0005] [[ID = 32]] A plug telescopic mechanism for a power converter comprising a housing, an upper cover that closes the housing, and a telescopic plug movably disposed on the housing and the upper cover, The telescopic plug comprises a socket body movably disposed within the housing, a plug assembly disposed within the socket body, and an operating mechanism disposed within the plug assembly and slidably disposed on the socket body, wherein the plug assembly comprises a common slide movably disposed on the socket body and at least two prongs disposed on the common slide, the socket body is provided with a standard outlet through which the prongs pass and protrude out of the socket body, the side of the housing is formed with an upper housing operating slot that penetrates from one end toward the standard outlet and into which the operating mechanism is inserted and slidably disposed, the socket body is formed with a socket operating chute into which the operating mechanism is inserted and slidably disposed, the upper housing operating slot and the socket operating chute are on the same vertical axis and overlap in the vertical direction, the operating mechanism slides out of the housing along the upper housing operating slot and then continues to slide along the socket operating chute in the socket body.
[0006] As a further improvement of the present invention, a first positioning extending to both sides is formed at one end of the housing upper operating slot facing the upper cover, and a second positioning extending to both sides is formed at the other end of the housing upper operating slot away from the upper cover.
[0007] As a further improvement of the present invention, the operating mechanism comprises a push handle positioned on the common slide, the upper end of which protrudes from the housing, and a first reset member positioned between the push handle and the common slide.
[0008] As a further improvement of the present invention, the operating mechanism further comprises a limit fixing device disposed on the socket body, a socket limit member movably disposed on the limit fixing device, and a second reset member disposed between the socket limit member and the limit fixing device.
[0009] As a further improvement of the present invention, a socket limit plate is formed on the socket limit member, and when stored, the socket limit plate is inserted into the first positioning, and when pushed out for use, the push handle is pressed to push the socket limit plate out of the first positioning and is pushed out of the housing along the downward direction of the operating slot on the housing until the socket limit plate is positioned in the second positioning.
[0010] As a further improvement of the present invention, at least one socket limit block protruding laterally is formed on the side surface of the socket body, and the socket limit block limits the socket body from detaching from the housing. As a further improvement of the present invention, the housing is provided with at least one socket limit guide rail for sliding the socket limit block.
[0011] As a further improvement of the present invention, a second slide rail is provided on the inner wall of the socket body, located on the side of the socket operating chute and parallel to the socket operating chute, a third positioning is formed at one end of the second slide rail on the upper cover side, and a fourth positioning is formed at the other end of the second slide rail away from the upper cover.
[0012] As a further improvement to the present invention, the shared slide has a second chute formed therein that is aligned with the second slide rail.
[0013] As a further improvement to the present invention, a plug pallet is provided on the push handle, and when stored, the plug pallet is inserted into the third positioning, and when pushed out for use, the push handle is pressed, the first reset member is compressed and deformed, the plug pallet is pushed out and detached from the third positioning, the second slide rail is positioned in the second chute, and the plug pallet is pushed out of the housing along the second slide rail until it is positioned in the fourth positioning.
[0014] As a further improvement of the present invention, the socket body is provided with at least one limit fixing hole, and the limit fixing device has at least one limit fixing block formed thereon that engages with the limit fixing hole.
[0015] As a further improvement of the present invention, the socket limit member has at least one socket limit pusher extending outward, and the common slide has at least one socket limit slide hole for the socket limit pusher to slide.
[0016] As a further improvement of the present invention, the socket limit pusher is slidably inserted into the socket limit slide hole and is movable between an extended position and a retracted position relative to the common slide.
[0017] As a further improvement of the present invention, the socket limit pusher fits with the socket limit slide hole with a gap between them, and the socket limit pusher is radially movable within the socket limit slide hole.
[0018] As a further improvement of the present invention, the socket limit member is provided with socket limit sliders protruding from both sides, and the limit fixing device is provided with a socket limit chute for the socket limit pusher to slide up and down.
[0019] As a further improvement of the present invention, in the above-mentioned shared slide, first operating limit blocks are formed at both ends of the push handle, each protruding upward and limiting both ends of the push handle.
[0020] As a further improvement of the present invention, at least one second operating limit block is formed at the lower end of the push handle, protruding downward, and at least one second operating clearance hole is formed in the common slide that aligns with the second operating limit block.
[0021] As a further improvement to the present invention, the plug assembly described above is a plug assembly conforming to European standards.
[0022] As a further improvement of the present invention, a first slide rail is provided protruding from the inner wall of the housing, positioned on the side of the housing's upper operating slot and parallel to the housing's upper operating slot.
[0023] As a further improvement of the present invention, a fifth positioning is formed at the end of the first slide rail toward the upper cover, and a sixth positioning is formed at the end of the first slide rail toward the upper cover.
[0024] As a further improvement of the present invention, the socket body has at least one first chute formed therein that is aligned with the first slide rail.
[0025] As a further improvement of the present invention, a socket limit plate is formed on the socket limit member, and when stored, the socket limit plate is inserted into the fifth positioning, and when pushed out for use, the push handle is pressed to push the socket limit plate out of the fifth positioning, and the first slide rail is positioned in the first chute and the plug limit plate is positioned in the sixth positioning until it is pushed out of the housing along the first chute.
[0026] As a further improvement of the present invention, an extrusion guide slope is formed at the end of the upper cover of the first slide rail facing the upper cover.
[0027] As a further improvement of the present invention, a third slide rail protruding towards the housing is provided on the inner wall of the upper cover. The third slide rail is installed perpendicular to the upper cover and is located below the operation slot on the housing after the housing is closed by the upper cover.
[0028] As a further improvement of the present invention, a seventh positioning is formed at the end of the third slide rail facing the upper cover, and an eighth positioning is formed at the end of the third slide rail away from the upper cover.
[0029] As a further improvement of the present invention, at least one third chute matching the third slide rail is formed on the socket body.
[0030] As a further improvement of the present invention, a socket limit plate is formed on the socket limit member. When stored, the socket limit plate is inserted into the seventh positioning. When pushed out for use, the push handle is pressed and the plug limit plate is pushed out from the seventh positioning. The third slide rail is arranged in the third chute and is pushed out from the housing along the third chute until the socket limit plate is arranged in the eighth positioning.
Effects of the Invention
[0031] The telescopic plug mechanism comprises a housing, an upper cover that closes the housing, and a telescopic plug movably disposed on the housing and the upper cover, the telescopic plug comprising a socket body movably disposed on the housing, a plug assembly disposed on the socket body, and an operating mechanism disposed on the plug assembly and slidably disposed on the socket body, the plug assembly comprising a common slide movably disposed on the socket body, and at least two prongs disposed on the common slide, the socket body is provided with a standard outlet through which the prongs pass and protrude out of the socket body, the side of the housing is formed with an upper housing operating slot that passes through toward one end of the standard outlet and allows the operating mechanism to slide, the socket body is formed with a socket operating chute for sliding the operating mechanism, the upper housing operating slot and the socket operating chute are on the same vertical axis and overlap vertically, the operating mechanism slides out of the housing along the upper housing operating slot and then continues to slide along the socket operating chute in the socket body.
[0032] The telescopic plug is stored between the housing and the upper cover when not in use, and the prongs are stored in a shared slide. When it is necessary to push them out for use, an external force presses the operating mechanism, pushing the telescopic plug out of the housing along the housing operating groove. After sliding out of the housing along the operating groove, the operating mechanism continues to slide along the socket operating chute in the socket body, pushing the prongs out of the standard socket in the socket body, thus achieving the purpose of pushing out the prongs for use. By setting the housing upper operating slot and the socket operating chute on the same vertical axis and overlapping them vertically, the stroke limit of the operating mechanism becomes more precise, preventing the operating mechanism from shifting during use, facilitating precise operation of the operating mechanism, and making the overall operation of the operating mechanism smoother, thus making it more convenient for people to use in their daily lives. The housing upper operating slot is configured to extend and pass through towards one end of the standard outlet, which makes it easier to push the operating mechanism out radially for use, and makes the overall operation smoother. Furthermore, the two-stage telescopic structure, in which the plug assembly is housed in the socket body and the socket body in the housing, effectively shortens the overall length of the telescopic plug and, consequently, the overall size of the power converter, improving portability and ease of use during travel.
[0033] As outlined above, the technical solution of the present invention has been described in general terms. The present invention will now be further described with reference to the attached drawings and specific embodiments. [Brief explanation of the drawing]
[0034] [Figure 1] This is an overall schematic diagram of Example 1. [Figure 2] This is a schematic rear view of Example 1. [Figure 3] This is a schematic diagram of the internal structure with the top cover removed in Example 1. [Figure 4]This is a cross-sectional view of the storage configuration in Example 1. [Figure 5] This is a cross-sectional view of the telescopic plug in Example 1 when it is pushed out of the housing. [Figure 6] This is a cross-sectional view of the telescopic plug in Example 1, where the plug is pushed out of the housing and the prongs are pushed out of the socket body. [Figure 7] This is a schematic diagram of the housing structure in Example 1. [Figure 8] This is a schematic diagram of the structure of the telescopic plug in Example 1. [Figure 9] This is a cross-sectional view of the telescopic plug in Example 1. [Figure 10] This is a cross-sectional view showing the prongs being pushed out from the socket body in Example 1. [Figure 11] This is a schematic diagram of the structure of the socket body in Example 1. [Figure 12] This is a schematic diagram of an alternative structure of the socket body in Example 1. [Figure 13] This is a schematic diagram of the structure of the telescopic plug in Example 1 with the socket body removed. [Figure 14] This is a schematic diagram of the structure of the telescopic plug in Example 1, showing the state in which the socket body has been removed and the prongs have been pushed out from the socket body. [Figure 15] This is an exploded view of the common slide, the first reset member, and the push handle in Example 1. [Figure 16] This is a schematic diagram of the structure of the shared slide in Example 1. [Figure 17] This is a schematic diagram of the structure of the limit fixing device, socket limit member, and second reset member in Example 1. [Figure 18] This is a schematic diagram of another structure of the limit fixing device, socket limit member, and second reset member in Example 1. [Figure 19] This is an overall schematic diagram of Example 2. [Figure 20]This is a schematic diagram of the internal structure with the top cover removed in Example 2. [Figure 21] This is a cross-sectional view of the storage configuration in Example 2. [Figure 22] This is a cross-sectional view of the telescopic plug in Example 2 as it is pushed out of the housing. [Figure 23] This is a cross-sectional view of the telescopic plug in Example 2, with the prongs pushed out from the housing and the prongs pushed out from the socket body. [Figure 24] This is a schematic diagram of the housing structure in Example 2. [Figure 25] This is a schematic diagram of the structure of the telescopic plug in Example 2. [Figure 26] This is a cross-sectional view of the telescopic plug in Example 2. [Figure 27] This is a cross-sectional view of the prongs in Example 2, showing them pushed out from the socket body. [Figure 28] This is a schematic diagram of the structure of the socket body in Example 2. [Figure 29] This is a schematic diagram of an alternative structure of the socket body in Example 2. [Figure 30] This is a schematic diagram of the structure of the telescopic plug in Example 2 with the socket body removed. [Figure 31] This is a schematic diagram of the structure of the telescopic plug in Example 2, showing the socket body removed and the prongs pushed out from the socket body. [Figure 32] This is a schematic diagram of the structure of the limit fixing device, socket limit member, and second reset member in Example 2. [Figure 33] This is a schematic diagram of another structure of the limit fixing device, socket limit member, and second reset member in Example 2. [Figure 34] This is a schematic diagram of the entire structure after removing part of the structure in Example 3. [Figure 35] This is a schematic rear view of the structure in Example 3 after a portion of the structure has been removed. [Figure 36]This is an exploded view of the structure in Example 3 after some parts have been removed. [Figure 37] This is a cross-sectional view of the storage configuration in Example 3. [Figure 38] This is a cross-sectional view of the telescopic plug in Example 3 as it is pushed out of the housing. [Figure 39] This is a cross-sectional view of the telescopic plug in Example 3, where the plug is pushed out of the housing and the prongs are pushed out of the socket body. [Figure 40] This is a schematic diagram of the structure of the telescopic plug in Example 3. [Figure 41] This is a cross-sectional view of the telescopic plug in Example 3. [Figure 42] This is a cross-sectional view of the prongs in Example 3, extruded from the socket body. [Figure 43] This is a schematic diagram of the structure of the socket body in Example 3. [Figure 44] This is a schematic diagram of an alternative structure of the socket body in Example 3. [Figure 45] This is a schematic diagram of the structure of the telescopic plug in Example 3 with the socket body removed. [Figure 46] This is a schematic diagram of the structure of the telescopic plug in Example 3, showing the state in which the socket body has been removed and the prongs have been pushed out from the socket body. [Figure 47] This is a schematic diagram of the structure of the limit fixing device, socket limit member, and second reset member in Example 3. [Figure 48] This is a schematic diagram of another structure of the limit fixing device, socket limit member, and second reset member in Example 3. [Modes for carrying out the invention]
[0035] Hereinafter, in order to further describe the technical solutions and effects adopted to achieve the intended objectives, specific embodiments of the present invention will be described in detail with reference to the attached drawings and preferred embodiments.
[0036] In this description of the present invention, terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" should be understood as indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These are intended to make the description of the present invention easier and simpler, and do not suggest or imply that the devices or elements mentioned must have a particular orientation, or must be configured and operated in a particular orientation. Therefore, they should not be construed as limiting the present invention.
[0037] Incidentally, the terms “first” and “second” are for purpose only and should not be interpreted as indicating or implying relative importance, or implicitly specifying the number of technical features described. Therefore, features defined as “first” or “second” may include one or more of those features, either explicitly or implicitly. In this description of the invention, “multiple” means two or more unless otherwise specified.
[0038] In this invention, terms such as "installation," "connection," "connection," and "fixing" should be interpreted broadly unless otherwise specified and limited. For example, connections may be fixed, detachable, or integral. Connections may be mechanical or electrical. Connections may be direct or indirect via an intermediate medium. Furthermore, connections may be internal connections between two parts or interactions between two parts. Those skilled in the art should understand the specific meaning of the above terms in this invention depending on the specific situation.
[0039] Example 1 Referring to Figures 1 to 18, the power converter plug telescopic mechanism includes a housing 1, an upper cover 3 that closes the housing 1, and a telescopic plug 2 movably mounted on the housing 1 and the upper cover 3. The telescopic plug 2 includes a socket body 21 movably mounted on the housing 1, a plug assembly 22 mounted on the socket body 21, and an operating mechanism 23 mounted on the plug assembly 22 and slidably mounted on the socket body 21. The plug assembly 22 includes a common slide 221 movably mounted on the socket body 21, and at least two prongs 222 mounted on the common slide 221. The socket body 21 is provided with a standard outlet 217 through which prongs 222 pass and protrude from the socket body 21. The side of the housing 1 is provided with an upper housing operation slot 12 that extends toward and passes through one end of the standard outlet 217 and through which the operating mechanism 23 slides. The socket body 21 is provided with a socket operation chute through which the operating mechanism 23 slides. The upper housing operation slot 12 and the socket operation chute are on the same vertical axis and are distributed so as to overlap vertically. The operating mechanism 23 slides from the housing 1 along the upper housing operation slot 12 and then continues to slide on the socket body 21 along the socket operation chute.
[0040] When not in use, the telescopic plug 2 is stored between the housing 1 and the upper cover 3, and the prongs 222 are stored in the common slide 221. When it is necessary to push it out for use, an external force presses the operating mechanism 23, which pushes the operating mechanism 23 outward along the housing upper operating slot 12 in the housing 1, thereby causing the telescopic plug 2 to protrude from the housing 1. After sliding out of the housing 1 along the housing upper operating slot 12, the operating mechanism 23 continues to slide along the socket operating chute 216 into the socket body 21, pushing the prongs 222 out from the standard outlet 217 in the socket body 21, thereby achieving the purpose of pushing out the prongs 222 for use. By arranging the housing-top operating slot 12 and the socket operating chute 216 on the same vertical axis and overlapping them vertically, the stroke limit of the operating mechanism 23 becomes more precise, preventing the operating mechanism 23 from shifting during use, facilitating precise operation of the operating mechanism 23, and making the overall operation of the operating mechanism 23 smoother, thus making it more convenient for people to use in their daily lives. The housing-top operating slot 12 is structured to extend and pass through one end of a standard outlet, making it easier for the operating mechanism 23 to be pushed out radially, thereby making the overall operation smoother. Furthermore, by housing the plug assembly 22 in the socket body 21 and the socket body 21 in the housing 1, a two-stage telescopic structure is formed, thereby effectively shortening the overall length of the telescopic plug 2 and reducing the overall volume of the power converter, making it easier to carry and use when traveling.
[0041] As shown in Figures 4 to 6, the specific method for fixing the telescopic plug 2 to the housing 1 and the upper cover 3 is as follows: a first positioning 14 extending to both sides is formed at one end of the housing upper operating slot 12 facing the upper cover 3, and a second positioning 15 extending to both sides is formed at the other end of the housing upper operating slot 12 moving away from the upper cover 3. When not in use, the operating mechanism 23 engages with the first positioning 14 and will not detach from the first positioning 14 unless an external force is applied, thus achieving the objective of stably storing the telescopic plug 2 between the housing 1 and the upper cover 3. When it is necessary to push it out for use, the operating mechanism 23 is pushed out by an external force, and the operating mechanism 23 disengages from the first positioning 14 due to the action of the external force. Furthermore, the operating mechanism 23 slides out of the housing 1 along the operating slot 12 on the housing until it reaches the position of the second positioning 15. When the external force is removed, the operating mechanism 23 is reset upward and engages with the second positioning 15. Unless an external force is applied, it will not disengage from the second positioning 15, thus achieving the objective of stably protruding the telescopic plug 2 to the outside of the housing 1 and preventing the telescopic plug 2 from sliding and becoming unusable during use.
[0042] As for the specific configuration of the housing upper operation slot 12, one end of the housing upper operation slot 12 that approaches the upper cover 3 may either horizontally penetrate the upper cover 3 or remain closed without penetrating it. Therefore, it can be configured according to the actual situation, and is not particularly limited in this embodiment.
[0043] As shown in Figures 1 to 6 and Figures 8 to 15, the specific structural configuration of the operating mechanism 23 includes a push handle 231 installed on the common slide 221 with its upper end protruding outside the housing 1, and a first reset member 232 provided between the push handle 231 and the common slide 221.
[0044] As shown in Figure 15, preferably, the first reset member 232 is a spring. Since springs have stable rigidity, good elastic potential energy, excellent fatigue resistance, and are also inexpensive, manufacturing costs can be effectively reduced while ensuring the service life of the plug telescopic mechanism.
[0045] As shown in Figures 3 to 5, 7 to 10, 13, and 17 to 18, preferably, in order to make the operation of the operating mechanism 23 more precise, the operating mechanism 23 further includes a limit fixing device 233 installed on the socket body 21, a socket limit member 234 movably installed on the limit fixing device 233, and a second reset member 235 installed between the socket limit member 234 and the limit fixing device 233. The limit fixing device 233 is fixed to the socket body 21, and part of the structure of the socket limit member 234 fits into the limit fixing device 233.
[0046] As shown in Figures 17 and 18, preferably, the second reset member 235 is a spring, which has stable rigidity, good elastic potential energy, excellent fatigue resistance, and is also inexpensive, so that production costs can be effectively reduced while ensuring the service life of the plug telescopic mechanism.
[0047] As shown in Figures 3-5, 7-10, 13, and 17-18, as a specific method by which the operating mechanism 23 engages with the first positioning 14 and the second positioning 15, a socket limit plate 2343 is formed on the socket limit member 234. When stored, the socket limit plate 2343 on the socket limit member 234 engages with the first positioning 14 by the elastic force of the second reset member 235, limiting it to the first positioning 14. The socket limit plate 2343 will not detach from the first positioning 14 unless an external force is applied, thus effectively preventing the telescopic plug 2 from unintentionally protruding from the housing 1. When pushed out for use, the push handle 231 is pressed by an external force, and the push handle 231 is pushed down by the force, causing the socket to protrude. The limit member 234 is moved downward, the second reset member 235 is subjected to force and compressed, causing the socket limit plate 2343 to disengage from the first positioning 14. The socket body 21 moves and is pushed out of the housing 1 along the operating slot 12 on the housing until the socket limit plate 2343 is in position at the second positioning 15. Once the external force is removed, the second reset member 235, by its own elastic restoring force, moves the socket limit member 234 upward, causing the socket limit plate 2343 to engage with the second positioning 15. Since it will not disengage from the second positioning 15 unless an external force is applied, the objective of stabilizing the telescopic plug 2 outside the housing 1 is achieved, and the telescopic plug 2 can be prevented from sliding and becoming unusable during use.
[0048] As shown in Figures 3, 7, and 10, in order to prevent the telescopic plug 2 from protruding excessively from the housing 1, at least one socket limit block 215 that protrudes outward is formed on the side of the socket body 21. When the socket limit block 215 is moved and pushed outward, it is pressed against the housing 1 and cannot be inserted through the housing 1, thus effectively preventing the telescopic plug 2 from protruding excessively from the housing 1. Preferably, there are two sets of socket limit blocks 215, each installed on both outer sides of the socket body 21, to achieve the objective of uniform pressure and facilitate uniform restriction on the telescopic plug 2.
[0049] As shown in Figures 3, 7, and 10, preferably, to prevent lateral displacement when the socket body 21 is moved and pushed out of the housing 1, the housing 1 is provided with at least one socket limit guide rail 13 for sliding the socket limit block 215, and the socket limit block 215 slides on the socket limit guide rail 13, thereby limiting its stroke and preventing lateral displacement when the socket body 21 is moved and pushed out of the housing 1, thereby improving the movement accuracy and efficiency of the telescopic plug 2. Preferably, the number of socket limit guide rails 13 and the number of socket limit blocks 215 match at two sets, and the socket limit blocks 215 slide one-to-one within the socket limit guide rails 13, so that the sliding of the socket body 21 is uniformly restricted, further improving the movement accuracy and efficiency of the telescopic plug 2.
[0050] As shown in Figures 4 to 6 and Figures 9 to 11, as a specific method for using the prongs 222 by pushing them out from the socket body 21, a second slide rail 211 is provided protruding from the inner wall of the socket body 21, positioned on the side of the socket operating chute 216 and parallel to the socket operating chute 216, a third positioning 212 is formed at one end of the second slide rail 211 toward the upper cover 3, and a fourth positioning 219 is formed at the other end of the second slide rail 211 away from the upper cover 3. The prongs 222 are housed within the socket body 21, the push handle 231 engages with the third positioning 212, and the tip of the push handle 231 is pressed against the second slide rail 211. Since it will not detach from the third positioning 212 unless an external force is applied, the objective of stably fixing the prongs 222 within the socket body 21 is achieved, and the problem of the prongs 222 being unable to be housed due to free movement within the socket body 21 is avoided. When it is necessary to push it out for use, an external force presses the push handle 231, the first reset member 232 is pressed against the push handle 231 and compressed and deformed, the push handle 231 is pushed downward and detached from the third positioning 212, and the pushed-down operating mechanism 23 is pushed out of the housing 1 along the second slide rail 211 until the push handle 231 reaches the position of the fourth positioning 219. When the external force is removed, the push handle 231 is reset upward by the elastic restoring force of the first reset member 232, and the push handle 231 engages with the fourth positioning 219. The rear end of the push handle 231 is blocked by the second slide rail 211, and unless an external force is applied, the push handle 231 will not disengage from the fourth positioning 219. This achieves the objective of stabilizing the prong 222 outside the housing and prevents the prong 222 from sliding and becoming unusable during use.
[0051] As shown in Figures 4 to 6 and Figures 9 to 15, preferably, the common slide 221 has a second chute 2211 that aligns with the second slide rail 211, and when the push handle 231 moves the common slide 221 and slides it on the socket body 21, the second chute 2211 is positioned accordingly on the second slide rail 211, and these two work together to further limit the sliding stroke of the common slide 221 and the push handle 231, improving the extrusion accuracy of the prongs 222 and making it more convenient for people to use in their daily lives.
[0052] As shown in Figures 4-6, 8-10, and 15, the push handle 231 engages with the third positioning 212 and the fourth positioning 219. Specifically, the push handle 231 is provided with a plug pallet 2311. When stored, the plug pallet 2311 engages with the third positioning 212, and the tip of the plug pallet 2311 is pressed against the second slide rail 211. Unless an external force is applied, it will not detach from the third positioning 212. Therefore, when it is necessary to push it out for use, an external force presses the push handle 231, causing it to move downward and press against the first reset member 232. The first reset member 232 receives the force and undergoes compression deformation, and the plug positioning on the push handle 231 is synchronously pushed down, thereby pushing the third positioning 212 As the plug pallet 2311 is released and pushed outward along the second slide rail 211 until it reaches the position of the fourth positioning 219, the second chute 2211 in the common slide 221 is inserted into the second slide rail 211 and pushed outward along the second slide rail 211, and once the external force is removed, the first reset member 232 moves the push handle 231 upward by its elastic restoring force, so that the plug pallet 2311 in the push handle 231 is inserted into the fourth positioning 219, the rear end of the plug pallet 2311 is blocked by the tip of the second slide rail 211, and the plug pallet 2311 will not come off the fourth positioning 219 unless an external force is applied, thus achieving the objective of stabilizing the prong 222 outside the housing and preventing the prong 222 from sliding and becoming unusable during use.
[0053] As shown in Figures 8, 10-14, and 17-18, the specific method by which the limit fixing device 233 is fixed to the socket body 21 is as follows: the socket body 21 is provided with at least one limit fixing hole 213, and the limit fixing device 233 has at least one limit fixing block 2331 that engages with and connects to the limit fixing hole 213. Preferably, there are three sets of limit fixing blocks 2331, of which two sets are installed on both sides of the upper end of the limit fixing device 233, and the remaining set is The limit fixing block 233 is installed in the middle of the lower end of the limit fixing device 233, and the limit fixing hole 213 and the limit fixing block 2331 are aligned. There are three of these blocks, two of which are installed on both sides of the upper end of the socket body 21, and the remaining one is installed in the middle of the lower end of the socket body 21. The two are installed in a one-to-one vertical and stable manner, thus achieving the objective of stably fixing the limit fixing device 233 to the socket body 21, and thereby ensuring the limiting action of the socket limit member 234 on the plug assembly 22.
[0054] As shown in Figures 4-6, 9-10, 13-14, and 17-18, preferably, to further prevent situations in which the prongs 222 are not extruded accurately due to the common slide 221 shifting during operation, the socket limit member 234 is formed with at least one outwardly extending socket limit pusher 2341, and the common slide 221 is formed with at least one socket limit slide hole 2212 for sliding the socket limit pusher 2341, so that when the push handle 231 moves and slides the common slide 221, the socket limit slide hole 2212 follows the common slide 221 and slides on the socket limit pusher 2341, thereby achieving the purpose of sliding guided by the socket limit pusher 2341 and further preventing situations in which the prongs 222 are not extruded accurately due to the common slide 221 shifting during operation.
[0055] As shown in Figures 4-6, 9-10, 13-14, and 17-18, the socket limit pusher 2341 is slidably inserted into the socket limit slide hole 2212 and is movable between an extended position and a retracted position relative to the common slide 221. Specifically, when the common slide 221 is moved and slides, the socket limit pusher 2341 moves relative to the common slide 221, that is, slides within the socket limit slide hole 2212 of the common slide 221, thereby extending or retracting from the common slide 221.
[0056] As shown in Figures 4-6, 9-10, 13-14, and 17-18, preferably, there are two sets of socket limit slide holes 2212, each symmetrically positioned on the common slide 221, and two sets of socket limit pushers 2341 are also provided. By inserting each of these pushers through the socket limit slide holes 2212, they guide and limit both sides of the common slide 221, thereby improving the sliding accuracy of the common slide 221 and preventing offset due to unidirectional limiting.
[0057] As shown in Figures 4-6, 9-10, 13-14, and 17-18, preferably, the socket limit pusher 2341 and the socket limit slide hole 2212 are aligned with a gap, the socket limit pusher 2341 is radially movable within the socket limit slide hole 2212, and the minimum gap between the socket limit slide hole 2212 and the socket limit pusher 2341 is greater than zero, specifically, the width of the socket limit slide hole 2212 is aligned with the socket limit pusher 2341, and above The height of the socket limit slide hole 2212 is greater than the height of the socket limit pusher 2341, leaving sufficient height space for the movement of the socket limit pusher 2341. This allows the socket limit pusher 2341 to move into the socket limit slide hole 2212 even when it is pushed down by the push handle 231, ensuring the limit of the common slide 221 and providing space for the limit structure of the plug assembly 22, resulting in a secure and smooth fit between each component for ease of use.
[0058] As shown in Figures 4-6, 9-10, 13-14, and 17-18, the specific method by which the socket limit member 234 is limited by the limit fixing device 233 is as follows: The socket limit member 234 is equipped with socket limit sliders 2342 that protrude outwards to both sides, and the limit fixing device 233 is equipped with a socket limit chute 2332 for sliding the socket limit sliders 2342 up and down. The socket limit sliders 2342 are structured to protrude outwards to both sides, so that after they are fully fitted into the socket limit chute 2332, the socket limit chute 2332 Because it cannot detach from the socket to the left or right, the socket limit member 234 is limited by the limit fixing device 233, improving the accuracy of the movement of the socket limit member 234 within the limit fixing device 233. Furthermore, the height of the socket limit chute 2332 is set higher than the height of the socket limit slider 2342, leaving space for the socket limit slider 2342 to move up and down, ensuring the limit of the socket limit member 234. In addition, space is secured for the limit structure of the socket limit member 234 relative to the common slide 221, allowing for a firm and smooth fit between each component, resulting in ease of use.
[0059] As shown in Figures 4-6, 9-10, 13-14, and 17-18, preferably, the second reset member 235 is positioned between the socket limit sliders 2342, effectively fixing it between the socket limit member 234 and the limit fixing device 233, preventing the second reset member 235 from shifting, and further effectively providing elasticity to the socket limit member 234, resulting in ease of use.
[0060] As shown in Figures 4-6, 9-10, and 13-16, preferably, in order to prevent the push handle 231 from detaching from the common slide 221 and becoming unusable during use, the common slide 221 has first operating limit blocks 2213 formed on both ends of the push handle 231, each protruding upward and limiting both ends of the push handle 231. When the push handle 231 is inserted into the common slide 221, its front and rear ends are pressed against the first operating limit blocks 2213, and the first operating limit blocks 2213 have a structure that protrudes upward, thereby effectively preventing the push handle 231 from detaching from the common slide 221 and becoming unusable during use, and ensuring close cooperation between each component.
[0061] As shown in Figures 4-6, 9-10, and 13-16, preferably, the first operating limit block 2213 protrudes upward and enters the socket operating chute 216, and at the same time slides within the socket operating chute 216 by being moved by the push handle 231, thereby limiting the left-right stroke of the common slide 221. This effectively prevents the common slide 221 from shifting during pushing, which would prevent the prongs 222 from properly protruding from the socket body 21, and ensures the normal operation of the plug telescopic mechanism.
[0062] As shown in Figures 4-6 and 9-10, preferably, in order to further improve the precision and efficiency of the push handle 231 moving the common slide 221, at least one second operating limit block 2312 protruding downward is formed at the lower end of the push handle 231, and at least one second operating clearance hole 2214 is formed in the common slide 221 that is aligned with the second operating limit block 2312, so that when the push handle 231 is pressed downward by an external force, the second operating limit block 2312 on the push handle 231 moves downward and is inserted into the second operating clearance hole 2214, thereby strengthening the engagement between the common slide 221 and the push handle 231, which is advantageous for the push handle 231 to move and push out the common slide 221. Preferably, there are two sets of the second operating limit blocks 2312, each symmetrically positioned on both sides of the lower end of the push handle 231, and the number of second operating clearance holes 2214 matches the number of second operating limit blocks 2312, so that the common slide 221 can be moved on both sides of the lower end of the push handle 231, biasing it evenly and which is advantageous for precise movement.
[0063] As shown in Figures 1 to 18, preferably, the plug assembly 22 is a plug assembly conforming to European standards.
[0064] As shown in Figure 3, the ON structure of the plug assembly 22 is provided with a corresponding guide plate on the prong 222, so that after the telescopic plug 2 is pushed out of the housing 1, it can be connected to the ON structure in the power converter and turned ON. Alternatively, the prong 222 may be provided with a flexible connection to turn ON with the power converter, and since this ON method is a conventional means in the art, no special limitations are imposed in this embodiment.
[0065] Example 2 In the first embodiment, the specific structure of the plug telescopic mechanism was described. In this embodiment, the differences from other embodiments will be explained, and repeated explanations of identical structures will be omitted.
[0066] As shown in Figures 19 to 33, the main difference between Embodiment 2 and Embodiment 1 is that a first slide rail 11 is provided protruding from the inner wall of the housing 1, located to the side of the housing upper operating slot 12 and parallel to the housing upper operating slot 12, and the telescopic plug 2 slides on the first slide rail 11.
[0067] As shown in Figures 21-23, 26-27, and 28, a specific method for fixing the telescopic plug 2 is to form a fifth positioning 16 at one end of the first slide rail 11 facing the upper cover 3, and a sixth positioning 17 at the other end of the first slide rail 11 away from the upper cover 3.
[0068] As shown in Figures 21-23, 26-27, and 29, the socket limit member 234 has a socket limit plate 2343 formed on it as a specific method of limiting the housing 1. When stored, the socket limit plate 2343 on the socket limit member 234 is inserted into the fifth positioning 16, and the socket limit plate 2343 is pressed against the rear end of the first slide rail 11 and limited by the first slide rail 11. The socket limit plate 2343 will not come off the fifth positioning 16 unless an external force is applied, so as to effectively prevent the telescopic plug 2 from inadvertently protruding from the housing 1 and being damaged, when pushed out for use, the push handle 231 is pressed by an external force, and the push handle 231 is pushed down by the force and the socket limit member When the 234 is moved downward, the second reset member 235 is subjected to force and compressed, causing the socket limit plate 2343 to detach and be pressed against the rear end of the first slide rail 11, thereby detaching it from the fifth positioning 16. The socket body 21 is pushed out of the housing 1 along the first slide rail 11 until the socket limit plate 2343 is in the sixth positioning 17. Once the external force is removed, the second reset member 235 moves the socket limit member 234 upward by its own elastic restoring force, causing the socket limit plate 2343 to be inserted into the sixth positioning 17. Since it will not detach from the sixth positioning 17 unless an external force is applied, the objective of stabilizing the telescopic plug 2 outside the housing 1 is achieved, and the problem of the telescopic plug 2 sliding and becoming unusable during use can be avoided.
[0069] As shown in Figures 21-23 and 26-29, preferably, the socket body 21 has at least one first chute 214 that aligns with the first slide rail 11, and when the push handle 231 moves the socket body 21 and slides it on the housing 1, the first chute 214 is inserted into the first slide rail 11 accordingly, and these two cooperate with each other to further limit the sliding stroke of the socket body 21 and the push handle 231, thereby improving the extrusion accuracy of the telescopic plug 2 and making it more convenient for people to use in their daily lives.
[0070] As shown in Figures 21 to 23, preferably, in order to facilitate the extrusion of the telescopic plug 2, a push guide slope 111 extending diagonally from the upper inner side to the lower outer side is formed at one end of the first slide rail 11 facing inward. When the socket limit plate 2343 is moved downward by the push handle 231, it initially comes into contact with the push guide slope 111. Due to the diagonal guiding action of the push guide slope 111, the socket limit plate 2343 can be easily moved by the lower end of the first slide rail 11, causing the first chute 214 to slide along the first slide rail 11. This makes the extrusion use of the telescopic plug 2 advantageous and improves the extrusion accuracy and efficiency of the socket limit plate 2343.
[0071] Example 3 In the first embodiment, the specific structure of the plug telescopic mechanism was described. In this embodiment, however, the differences from the other embodiments will be explained in detail, and repeated explanations of the same structure will be omitted.
[0072] As shown in Figures 34 to 48, the main difference between Embodiment 3 and Embodiment 1 is that a third slide rail 31 is installed on the inner wall of the upper cover 3, protruding toward the housing 1, the third slide rail 31 is installed perpendicular to the upper cover 3, and is located below the housing upper operation slot 12 after the housing 1 is closed by the upper cover 3.
[0073] As shown in Figures 36 to 39, as a specific method for fixing the telescopic plug 2, after the housing 1 is closed by the upper cover 3, a seventh positioning 32 is formed on one end of the third slide rail 31 facing the upper cover 3, and an eighth positioning 33 is formed on the other end of the third slide rail 31 that moves away from the upper cover 3.
[0074] As shown in Figures 36-42 and 45-48, the socket limit member 234 has a socket limit plate 2343 formed on it as a specific method of limiting the housing 1. When stored, the socket limit plate 2343 on the socket limit member 234 is inserted into the seventh positioning 32, and the socket limit plate 2343 is pressed against the rear end of the third slide rail 31, limiting it to the third slide rail 31. The socket limit plate 2343 will not come off the seventh positioning 32 unless an external force is applied, thus effectively preventing the telescopic plug 2 from inadvertently protruding from the housing 1 and being damaged. When pushed out for use, the push handle 231 is pressed by an external force, and the push handle 231 is pushed down by the force, and the socket limit member 234 When the force is removed, the second reset member 235 is moved downward, and the second reset member 235 is compressed and deformed by the force, causing the socket limit plate 2343 to detach and be pressed against the rear end of the third slide rail 31, thereby detaching it from the seventh positioning 32. The socket body 21 is pushed out of the housing 1 along the third slide rail 31 until the socket limit plate 2343 is in the eighth positioning 33. When the external force is removed, the second reset member 235 moves the socket limit member 234 upward by its own elastic restoring force, and the socket limit plate 2343 is inserted into the eighth positioning 33. Since it will not detach from the eighth positioning 33 unless an external force is applied, the objective of stabilizing the telescopic plug 2 outside the housing 1 is achieved, and the problem of the telescopic plug 2 sliding and becoming unusable during use can be avoided.
[0075] Preferably, as shown in Figures 40 and 42, the socket body 21 has at least one third chute 218 that aligns with the third slide rail 31, and when the push handle 231 moves the socket body 21 and slides it on the housing 1, the third chute 218 is inserted accordingly into the third slide rail 31, and these two cooperate with each other to further limit the sliding stroke of the socket body 21 and the push handle 231, thereby improving the extrusion accuracy of the telescopic plug 2 and making it more convenient for people to use in their daily lives.
[0076] It should be noted that while the plug telescopic mechanism of the power converter disclosed in this invention is an improvement over a specific structure, its specific control method is not novel to this invention. The springs, guide plates, flexible connections, and other components of this invention are general standard components or components well known to those skilled in the art, and their structure, principle, and control method can all be understood by those skilled in the art through technical manuals or conventional experimental methods.
[0077] As described above, these are merely preferred embodiments of the present invention and do not limit the scope of the present invention. Therefore, all other structures obtained using the same or similar technical features as those of the above embodiments of the present invention are also included within the scope of the present invention. [Explanation of Symbols]
[0078] 1 Housing 11. First slide rail 111 Push Guided Slope 12 Housing Top Operation Slots 13 Socket Limit Guide Rail 14. First Positioning 15. Second Positioning 16. The Fifth Positioning 17. The Sixth Positioning 2 Telescopic plugs 21 Socket body 211 Second slide rail 212 Third Positioning 213 limit fixing holes 214 First Shot 215 Socket Limit Block 216 Socket Operation Chute 217 Standard outlet 218 The third shot 219 The Fourth Positioning 22 Plug Assembly 221 Shared Slides 2211 Second Shot 2212 Socket Limit Slide Hole 2213 First operation limit block 2214 Second operating clearance hole 222 Prong 23 Operating mechanism 231 Push handle 2311 Plug Palette 2312 Second operation limit block 232 First reset member 233 Limit Fixing Device 2331 Limit Fixed Block 2332 Socket Limit Shoot 234 Socket limit member 2341 Socket Limit Pusher 2342 Socket Limit Slider 2343 Socket Limit Plate 235 Second reset member 3. Top cover 31 Third slide rail 32. The 7th Positioning 33. The 8th positioning.
Claims
1. 1. A plug telescopic mechanism for a power converter comprising a housing, an upper cover that closes the housing, and a telescopic plug movably disposed on the housing and the upper cover, The telescopic plug comprises a socket body movably disposed in the housing, a plug assembly disposed in the socket body, and an operating mechanism disposed on the plug assembly and slidably disposed on the socket body, the plug assembly comprising a common slide movably disposed on the socket body, and at least two prongs disposed on the common slide, the socket body is provided with a standard outlet through which the prongs pass and protrude out of the socket body, the side of the housing is formed with an upper housing operating slot that penetrates from one end toward the standard outlet and into which the operating mechanism is inserted and slidably disposed, the socket body is formed with a socket operating chute into which the operating mechanism is inserted and slidably disposed, the upper housing operating slot and the socket operating chute are on the same vertical axis and overlap in the vertical direction, the operating mechanism slides out of the housing along the upper housing operating slot and then continues to slide along the socket operating chute in the socket body. The above operating mechanism is located on the above shared slide and includes a push handle whose upper end protrudes from the housing. A plug telescopic mechanism for a power converter, characterized by the following features.
2. The above operating mechanism includes a first reset member positioned between the push handle and the common slide. A plug telescopic mechanism for a power converter according to feature 1.
3. The above operating mechanism further comprises a limit fixing device disposed on the socket body, a socket limit member movably disposed on the limit fixing device, and a second reset member disposed between the socket limit member and the limit fixing device. The plug telescopic mechanism for a power converter according to feature 2.
4. A first positioning extending to both sides is formed at one end of the housing upper operating slot facing the upper cover, and a second positioning extending to both sides is formed at the other end away from the upper cover of the housing upper operating slot. The plug telescopic mechanism for a power converter according to feature 3.
5. A socket limit plate is formed on the above-mentioned socket limit member. When stored, the socket limit plate is inserted into the first positioning. When pushed out for use, the push handle is pressed, pushing the socket limit plate out of the first positioning and pushing it out of the housing along the downward direction of the upper operating slot until the socket limit plate is positioned in the second positioning. The plug telescopic mechanism for a power converter according to feature 4.
6. At least one socket limit block protruding laterally is formed on the side of the socket body, and the socket limit block limits the socket body from detaching from the housing. A plug telescopic mechanism for a power converter according to feature 1.
7. The housing has at least one socket limit guide rail formed therein for sliding the socket limit block. The plug telescopic mechanism for a power converter according to feature 6.
8. A second slide rail is provided on the inner wall of the socket body, located on the side of the socket operating chute and parallel to the socket operating chute, a third positioning is formed at one end of the second slide rail on the upper cover side, and a fourth positioning is formed at the other end of the second slide rail away from the upper cover. A plug telescopic mechanism for a power converter according to any one of claims 2 to 4.
9. The above shared slide has a second chute formed therein that is aligned with the second slide rail. The plug telescopic mechanism for a power converter according to feature 8.
10. A plug pallet is provided on the push handle, and when stored, the plug pallet is inserted into the third positioning, and when pushed out for use, the push handle is pressed, the first reset member is compressed and deformed, the plug pallet is pushed out and detached from the third positioning, the second slide rail is positioned in the second chute, and the plug pallet is pushed out of the housing along the second slide rail until it is positioned in the fourth positioning. The plug telescopic mechanism for a power converter according to feature 9.
11. The socket body is provided with at least one limit fixing hole, and the limit fixing member has at least one limit fixing block formed thereon that engages with the limit fixing hole. A plug telescopic mechanism for a power converter according to any one of claims 3 to 5.
12. In the socket limit member described above, at least one socket limit pusher extending outward is formed, and in the common slide, at least one socket limit slide hole is formed for the socket limit pusher to slide. A plug telescopic mechanism for a power converter according to any one of claims 3 to 5.
13. The socket limit pusher is slidably inserted into the socket limit slide hole and is movable between an extended position and a retracted position relative to the common slide. The plug telescopic mechanism for a power converter according to claim 12.
14. The socket limit pusher fits with the socket limit slide hole with a gap between them, and the socket limit pusher is radially movable within the socket limit slide hole. The plug telescopic mechanism for a power converter according to claim 12.
15. The socket limit member is provided with socket limit sliders protruding from both sides, and the limit fixing device is provided with a socket limit chute for the socket limit sliders to slide up and down. A plug telescopic mechanism for a power converter according to any one of claims 3 to 5.
16. In the above-mentioned shared slide, first operating limit blocks are formed at both ends of the push handle, each protruding upward and limiting both ends of the push handle. A plug telescopic mechanism for a power converter according to any one of claims 2 to 5.
17. At least one second operating limit block is formed at the lower end of the push handle, protruding downward, and at least one second operating clearance hole is formed in the common slide, which is aligned with the second operating limit block. A plug telescopic mechanism for a power converter according to any one of claims 2 to 5.
18. The above plug assembly is a plug assembly conforming to European standards. A plug telescopic mechanism for a power converter according to feature 1.
19. A first slide rail is provided protruding from the inner wall of the housing, positioned on the side of the housing's upper operating slot and parallel to the housing's upper operating slot. The plug telescopic mechanism for a power converter according to feature 3.
20. A fifth positioning is formed at the end of the first slide rail toward the upper cover, and a sixth positioning is formed at the end of the first slide rail toward the upper cover. A plug telescopic mechanism for a power converter according to the feature described in 19.
21. The socket body has at least one first chute that aligns with the first slide rail. A plug telescopic mechanism for a power converter according to claim 20, characterized in that it is a plug telescopic mechanism.
22. A socket limit plate is formed on the socket limit member described above. When stored, the socket limit plate is inserted into the fifth positioning. When pushed out for use, the push handle is pressed, pushing the socket limit plate out of the fifth positioning, and the first slide rail is positioned in the first chute. The socket limit plate is then pushed out of the housing along the first chute until it is positioned in the sixth positioning. The plug telescopic mechanism for a power converter according to claim 21.
23. An extrusion guide slope is formed at the end of the first slide rail described above that faces the upper cover. A plug telescopic mechanism for a power converter according to the feature described in 19.
24. The inner wall of the upper cover is provided with a third slide rail that protrudes toward the housing, and the third slide rail is installed perpendicular to the upper cover and is located below the upper operating slot of the housing after the upper cover is closed. The plug telescopic mechanism for a power converter according to feature 3.
25. A seventh positioning is formed at the end of the third slide rail facing the upper cover, and an eighth positioning is formed at the end of the third slide rail moving away from the upper cover. The plug telescopic mechanism for a power converter according to the feature described in 24.
26. The socket body has at least one third chute that aligns with the third slide rail. The plug telescopic mechanism for a power converter according to claim 25, characterized in that it is a plug telescopic mechanism for a power converter.
27. A socket limit plate is formed on the socket limit member described above. When stored, the socket limit plate is inserted into the seventh positioning. When pushed out for use, the push handle is pressed, pushing the plug limit plate out of the seventh positioning, so that the third slide rail is positioned in the third chute and the socket limit plate is pushed out of the housing along the third chute until it is positioned in the eighth positioning. A plug telescopic mechanism for a power converter according to claim 26, characterized by its features.