A transmission shaft and transmission assembly applied to a scalable power plug

Abstract

The utility model discloses a transmission shaft and transmission subassembly applied to telescopic power plug, including shaft body and connecting piece, and the first spiral slide groove and the second spiral slide groove are set up to the shaft body outer surface along the axial direction, first spiral slide groove is used for guiding the first abutting block that cooperates with it and moves along the axial direction of shaft body, second spiral slide groove is used for guiding the second abutting block that cooperates with it and moves along the axial direction of shaft body, and connecting piece sets up in one end of shaft body, is used for rotatably installing transmission shaft to power plug, makes transmission shaft can rotate around the axial rotation of shaft body, wherein, when transmission shaft rotates, the first abutting block in first spiral slide groove and the second abutting block in second spiral slide groove link together, and move along the axial direction of shaft body together, the utility model discloses through the rotation of shaft body, realizes the overall lifting of socket body and the telescopic of plug terminal synchronously, and greatly simplifies the structure and promotes the reliability.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connector technology, specifically relating to a transmission shaft and transmission assembly used in retractable power plugs. Background Technology

[0002] With the widespread use of portable electronic devices such as smartphones, laptops, tablets, and power tools, their chargers and power adapters have become indispensable items for people's daily travel. One of the core components of these chargers is the AC power plug used to connect to mains power.

[0003] Currently, most mainstream charger plugs on the market feature fixed, exposed metal prongs (or pins). This design presents significant drawbacks during transportation, storage, and post-use organization, including easy damage to the prongs, inconvenience in carrying, and potential damage to items. To address these issues, the industry has proposed solutions using retractable plugs, aiming to improve portability and protection by retracting the prongs into the housing. However, existing retractable plug designs generally suffer from a key flaw: structural complexity. These designs typically rely on multiple independent telescopic mechanisms (such as springs, latches, sliders, and linkages), complex locking devices, and precise guide structures to achieve simultaneous telescopic extension and reliable locking of single or multiple prongs. This complexity leads to the following problems:

[0004] 1. The assembly process is complicated, which increases the difficulty of production and manufacturing costs.

[0005] 2. Reliability challenges: Too many moving parts and connection points increase the risk of potential mechanical failure, wear, and jamming, making it difficult to guarantee long-term stability and durability.

[0006] 3. The complex internal structure may take up valuable internal space, which is not conducive to the miniaturization design of the charger. Utility Model Content

[0007] This invention provides a drive shaft and drive assembly for a retractable power plug to solve the problems mentioned in the background art.

[0008] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0009] A drive shaft for use in a retractable power plug, comprising:

[0010] The shaft body has a first spiral groove and a second spiral groove formed along the axial direction on its outer surface.

[0011] The first spiral groove and the second spiral groove have their orthographic projections in the same direction intersecting each other, and a transition groove segment is formed at the intersection of the projections;

[0012] The first spiral groove is used to guide the first abutment block that cooperates with it to move axially along the shaft.

[0013] The second spiral groove is used to guide the second abutment block that mates with it to move axially along the shaft.

[0014] A connector, located at one end of the shaft, is used to rotatably mount the drive shaft to a power plug, allowing the drive shaft to rotate about the axial direction of the shaft.

[0015] Based on the above scheme, the connector is rod-shaped, and its cross-sectional area decreases in the direction away from the shaft.

[0016] Based on the above scheme, the connector is rod-shaped; a rotating groove is provided at the end of the connector away from the shaft.

[0017] Based on the above scheme, the intersections of the inner walls and bottom walls of the first spiral groove and the second spiral groove are all chamfered.

[0018] Based on the above scheme, the groove depth of the first spiral groove is equal to or greater than the groove depth of the second spiral groove, so as to restrict the first abutment block located in the first spiral groove from disengaging from the first spiral groove and entering the second spiral groove.

[0019] Based on the above solutions, it also includes

[0020] The base housing, on which the first abutment block is fixedly installed;

[0021] The first abutting block is embedded in the first spiral groove, so that when the first abutting block moves along the path of the first spiral groove, it can drive the shaft to rotate along its axial direction.

[0022] When the first abutting block slides along the path of the first spiral groove and drives the shaft to rotate, the second abutting block located in the second spiral groove moves along the axial direction of the shaft.

[0023] Based on the above scheme, the first abutting block includes a receiving part and an abutting part. The receiving part matches the shape of the inner cavity of the first spiral groove, and the abutting part is an inwardly concave curved surface that contacts the bottom end surface of the first spiral groove.

[0024] Based on the above solution, it also includes a drive component and a socket body;

[0025] The drive assembly and socket body are both housed within the base housing;

[0026] The drive component is configured to respond to user operation and drive the socket body to move along a preset direction;

[0027] The socket body includes:

[0028] The main body shell has at least one first through hole;

[0029] The movable seat is slidably disposed within the main body housing;

[0030] The plug terminal is fixed to the movable base and corresponds to the position of the first through hole;

[0031] The movable seat is fixedly provided with the second abutment block, which is embedded in the second spiral groove;

[0032] When the socket body moves, the first abutment block forces the shaft to rotate through the engagement of the first spiral groove; the rotation of the shaft is achieved through the engagement of the second spiral groove and the second abutment block, causing the shaft of the drive moving seat to move axially, thereby causing the plug terminal to extend or retract into the first through hole.

[0033] Based on the above scheme, the drive assembly includes a drive ring and an upper rotating cover;

[0034] The base housing forms a receiving cavity with a top opening, the drive ring is rotatably disposed in the receiving cavity, and the upper rotating cover covers the opening of the receiving cavity and is connected to the drive ring for synchronous rotation;

[0035] The socket body is movably disposed within the receiving cavity. A drive slider is provided on the outer side of the socket body, and a lifting guide rail is provided on the inner wall of the drive ring. The drive slider slides in cooperation with the lifting guide rail so that when the drive ring rotates, it pushes the socket body to move along a preset direction.

[0036] Based on the above scheme, the upper rotating cover is provided with a first engaging protrusion, and the driving ring is provided with a first engaging groove that matches the first engaging protrusion.

[0037] The advantages of this utility model over the prior art are as follows:

[0038] 1. By rotating the drive ring, the vertical lifting of the socket body and the horizontal extension of the plug terminals are driven simultaneously, replacing the traditional multi-stage independent mechanism (such as spring, buckle, and linkage combination). The number of parts is reduced, significantly reducing assembly difficulty and manufacturing cost.

[0039] 2. The lifting movement of the socket body is forcibly converted into the extension and retraction movement of the plug terminal through the helical groove of the fixed rod and the bidirectional screw, without any additional driving components; the limit block and the limit notch fit together to provide a locking position and avoid misoperation; the spring-assisted reset ensures smooth retraction. Attached Figure Description

[0040] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0041] Figure 1 A schematic diagram showing the disassembled plug provided by this utility model;

[0042] Figure 2 A schematic diagram showing the plug split at another angle for this utility model;

[0043] Figure 3 for Figure 2 Enlarged view of point A shown.

[0044] Figure 4 This is a partial structural diagram of the plug of this utility model.

[0045] Figure 5 for Figure 4 The cross-sectional view of AA is shown.

[0046] Figure 6 for Figure 5 Enlarged view of point B.

[0047] Figure 7 This is a partial structural diagram of the plug of this utility model.

[0048] Figure 8 for Figure 7 The cross-sectional view of BB is shown.

[0049] Figure 9 for Figure 8 A magnified view of point C shown.

[0050] Figure 10 This is a partial structural diagram of the plug of this utility model.

[0051] Figure 11 for Figure 1 The diagram shows a disassembled view of the socket body.

[0052] Figure 12 for Figure 11 The diagram shows a split view of the socket body from another angle.

[0053] Figure 13 for Figure 2 The diagram shows the structure of the movable base and the bidirectional screw.

[0054] Figure 14 for Figure 13 A magnified view of point D shown.

[0055] Figure 15for Figure 13 A magnified view of point E shown.

[0056] Figure 16 for Figure 13 A schematic diagram of the structure of a bidirectional screw.

[0057] Figure 17 for Figure 16 A schematic diagram of the structure of the bidirectional screw at another angle.

[0058] Figure 18 This is a schematic diagram of the structure of the bidirectional screw with two sets of spiral grooves of the same depth in this utility model.

[0059] Figure 19 This is a diagram showing the usage status of the socket of this utility model.

[0060] Figure 20 This is a schematic diagram of the lifting guide rail 22 having a groove structure in this utility model.

[0061] Figure label:

[0062] Plug 100;

[0063] Base shell 1, bottom plate 11, side wall 12, receiving cavity 13, annular slide 131, limiting block 132;

[0064] Drive ring 2, first engagement groove 21, lifting guide rail 22, limiting notch 23;

[0065] Upper rotating cover 3, first engaging protrusion 31, center hole 32, upper limit flange 33;

[0066] Fixed cover 4, central fixed shaft 41, lower limit flange 42, socket extension hole 43;

[0067] Socket body 5, drive slider 51, guide collar 52, sliding sleeve 53, main body housing 54, upper housing 541, lower housing 542, receiving space 55, first through hole 56, moving seat 57, plug terminal 58, second through hole 60, bidirectional screw 61, first abutting block 62, first spiral groove 63, second abutting block 64, second spiral groove 65; receiving part 66, abutting part 67, return spring 68; shaft body 69, transition groove section 70, connecting piece 71; rotating groove 72;

[0068] Bottom cover 6, guide rod 8, first fixing rod 9, second fixing rod 10. Detailed Implementation

[0069] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is illustrative in nature and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0070] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary rather than limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0072] This utility model belongs to the field of electrical connector technology, specifically relating to a retractable plug structure for power adapters or chargers of electronic devices. The plug is ingeniously designed, integrating functions such as rotary drive, linear lifting, internal plug extension and retraction, and automatic reset.

[0073] like Figure 1 , Figure 2 , Figure 3 As shown, the plug mainly includes a base housing 1, a drive ring 2, an upper rotating cover 3, a fixed cover 4, a socket body 5, and a bottom cover 6.

[0074] The base housing 1 serves as the basic frame of the plug 100. Its main body consists of a base plate 11 and an annular sidewall 12 extending upward from the edge of the base plate 11. The base plate 11 and the sidewall 12 together enclose a receiving cavity 13 with an open top. An annular slide 131 is provided on the inner surface of the base plate 11 facing the receiving cavity 13. A bottom cover 6 is provided on the side of the base plate 11 away from the receiving cavity 13. The bottom cover 6 is used to close the base plate 11 and improve the overall aesthetic appearance.

[0075] The drive ring 2 is an annular component disposed within the receiving cavity 13. Under normal conditions, the drive ring 2 rests on the annular slide rail 131 of the base plate 11 by its own weight. Under external force, the drive ring 2 can smoothly rotate circumferentially along the annular slide rail 131, which defines the movement trajectory of the drive ring 2.

[0076] Please refer to the following: Figure 4 , Figure 5 , Figure 6 The accommodating cavity 13 of the base housing 1 is covered with a rotatable upper rotating cover 3. On the end face of the upper rotating cover 3 facing the drive ring 2, a plurality of equally spaced first engaging protrusions 31 are provided. Figure 6 (As shown). Correspondingly, on the end face of the drive ring 2 facing the upper rotating cover 3, a plurality of first engaging grooves 21, which match the first engaging protrusions 31, are evenly distributed along the circumferential direction. By precisely embedding the first engaging protrusions 31 of the upper rotating cover 3 into the first engaging grooves 21 of the drive ring 2, a reliable connection and torque transmission between the two can be achieved; this connection method allows the user to directly and synchronously drive the lower drive ring 2 to rotate simply by rotating the upper rotating cover 3. It should be noted that the number of first engaging grooves 21 and first engaging protrusions 31 is not necessarily multiple. In specific design cases, only one first engaging groove 21 and one corresponding first engaging protrusion 31 can be provided. Through the engagement of a single protrusion and groove, a reliable connection and synchronous rotation function between the upper rotating cover 3 and the drive ring 2 are achieved. In some embodiments, the drive ring 2 and the upper rotating cover 3 can be designed and manufactured as an inseparable integral component; in other embodiments, the connection between the drive ring 2 and the upper rotating cover 3 can also be achieved through fasteners. For example, fasteners such as bolts and screws can be used to lock the upper rotating cover 3 to the drive ring 2. This method is convenient for assembly, disassembly and maintenance, but it requires the design of corresponding mounting holes on the components.

[0077] A circular central hole 32 is formed in the center of the upper rotating cover 3. The fixed cover 4 is assembled into the central hole 32, and its shape is adapted to the central hole 32. An upper limit flange 33 is provided on the inner wall of the central hole 32, and a lower limit flange 42 is provided on the outer periphery of the fixed cover 4. The lower limit flange 42 is located above the upper limit flange 33 (i.e., on the side away from the drive ring 2) and abuts against the upper limit flange 33. A central fixing shaft 41 extends from the fixed cover 4 toward the inner side of the receiving cavity 13. The central fixing shaft 41 passes through the receiving cavity 13, and its end is fixedly connected to the bottom plate 11 of the base housing 1 by bolts. The fixing of the central fixing shaft 41, combined with the abutting cooperation of the lower limit flange 42 and the upper limit flange 33, provides axial support for the synchronous rotation of the upper rotating cover 3 and the drive ring 2. This structure allows the upper rotating cover 3 to rotate freely relative to the fixed cover 4, while the axial displacement of the upper rotating cover 3 is effectively limited by the mutually abutting lower limiting flange 42 and upper limiting flange 33. It should be noted that the bolt passes through the base plate 11 of the base housing 1 and is threaded to the end of the central fixed shaft 41. The head of the bolt is located on the outside of the base plate 11 away from the receiving cavity 13; the bottom cover 6 closes the base plate 11 to conceal the head of the bolt, enhancing its aesthetic appearance.

[0078] Please refer to the following: Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown:

[0079] The socket body 5 is movably disposed within the receiving cavity 13. The fixed cover 4 has a socket extension hole 43 that matches the shape and size of the socket body 5. In this embodiment, the socket body 5 is configured to extend to the outside or retract into the receiving cavity 13 through the socket extension hole 43.

[0080] Specifically, a drive slider 51 is fixedly installed on the outer side of the socket body 5. A specific arc-shaped lifting guide rail 22 is provided on the inner sidewall of the drive ring 2, i.e., the side closest to the socket body 5. The drive slider 51 abuts against the arc-shaped wall surface of the lifting guide rail 22. When the drive ring 2 is rotated by the upper rotating cover 3, the arc-shaped wall surface of the lifting guide rail 22 acts on the drive slider 51, forcing the socket body 5 to move along a preset direction (vertical direction in this embodiment). At this time, the socket body 5 can extend to the outside through the socket extension hole 43. It should be noted that... (See also...) Figure 20In some embodiments, the lifting guide rail 22 can be designed as a groove structure. In this case, the drive slider 51 acts on the inner wall of the groove (i.e., the arc-shaped wall surface of the lifting guide rail 22), which can also drive the socket body 5 to move along a preset direction. This structure can not only extend the socket body 5 when rotating in the forward direction, but also drive the socket body 5 to retract into the receiving cavity 13 when rotating the upper cover 3 in the reverse direction. In other embodiments, the inner sidewall of the drive ring 2 can be provided with multiple sets of lifting guide rails 22 connected end to end. In this way, when the upper cover 3 is continuously rotated in the same direction, the socket body 5 can be forced to perform a reciprocating (cyclic) motion of extending and retracting along a preset motion trajectory.

[0081] To ensure that the socket body 5 moves along a precise linear vertical trajectory within the receiving cavity 13, at least one guide rod 8 is provided inside the cavity. The two ends of the guide rod 8 are respectively fixed to the inner side of the fixing cover 4 and the bottom plate 11 of the base housing 1, thereby establishing a stable vertical guiding reference within the receiving cavity 13. A guide collar 52 is fixedly installed on the socket body 5, and this guide collar 52 is precisely fitted onto the guide rod 8. When the socket body 5 moves vertically, the guide collar 52 slides smoothly along the length of the guide rod 8, effectively constraining the movement path of the socket body 5 and preventing it from deviating or rotating. It should be noted that there are many ways to fix the guide rod 8 within the receiving cavity 13; in some embodiments, the two ends of the guide rod 8 are respectively fastened to the fixing cover 4 and the bottom plate 11 with bolts to achieve reliable fixation; in other embodiments, positioning grooves are provided on the inner side of the fixing cover 4 facing the bottom plate 11 and on the upper surface of the bottom plate 11 facing the fixing cover 4. During installation, the two ends of the guide rod 8 are inserted into the corresponding positioning slots to achieve a stable installation in the receiving cavity 13.

[0082] To precisely control the lifting stroke and final position (fully extended or fully retracted) of the socket body 5, and to limit the rotation angle of the drive ring 2, at least one limiting block 132 is provided on the annular slide 131 of the base housing 1; correspondingly, a matching limiting recess 23 is provided at the bottom of the drive ring 2. When the user rotates the drive ring 2 to a preset angle, for example, at the endpoint position corresponding to the fully extended or fully retracted socket body 5, the limiting block 132 will engage in the limiting recess 23, forming a mating contact. This mating state effectively locks the relative position between the drive ring 2 and the base housing 1, thereby mechanically preventing the drive ring 2 from continuing to rotate, ensuring that the socket body 5 accurately reaches and stably remains in the set position. It should be emphasized that when the limiting block 132 is in the limiting recess 23, the user only needs to apply a slightly larger rotational force to the drive ring 2 to disengage the limiting block 132 from the limiting recess 23. Once disengaged, the drive ring 2 can resume free rotation, and the user can then adjust the angle and control the stroke again. This design provides clear destination location while retaining operational flexibility.

[0083] A first fixing rod 9 is provided inside the base housing 1. One end of the first fixing rod 9 is fixed to the side of the fixing cover 4 near the receiving cavity 13. A sliding sleeve 53 is fixedly provided on the outer wall of the socket body 5. This sliding sleeve 53 is precisely fitted onto the first fixing rod 9 and slides along its axial direction. A return spring 68 is fitted on the first fixing rod 9 between the sliding sleeve 53 and the fixing cover 4. When the socket body 5 needs to extend outward, its outer sliding sleeve 53 moves along the first fixing rod 9. This movement compresses the return spring 68 located between the sliding sleeve 53 and the fixing cover 4, allowing the return spring 68 to store elastic potential energy. The extension stroke of the socket body 5 is ultimately precisely limited by the limiting block 132. When the socket body 5 reaches the fully extended position and is blocked by the limiting block 132, the return spring 68 is in a set compressed state, ready to provide a restoring force. When it is necessary to retract the socket body 5 into the receiving cavity 13, simply release the driving constraint on it. At this time, the compressed return spring 68 quickly releases its stored elastic potential energy, generating a restoring force. The restoring force acts directly on the sliding sleeve 53, pushing it to move along the first fixed rod 9 towards the base plate 11. Since the sliding sleeve 53 is fixed to the socket body 5, the restoring force of the return spring 68 effectively drives the entire socket body 5 to retract smoothly and reliably into the receiving cavity 13 of the base housing 1. This design of the return spring 68 assisting in reset greatly facilitates the user's operation and ensures that the socket body 5 can automatically and smoothly return to its original position.

[0084] Please refer to the following: Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 ;

[0085] Specifically, the socket body 5 includes a main housing 54, which includes an upper housing 541 and a lower housing 542. A receiving space 55 is provided inside the main housing 54; two first through holes 56 are provided on the top of the main housing 54. A movable base 57 and two sets of plug terminals 58 disposed on the movable base 57 are arranged within the receiving space 55. The plug terminals 58 are used to contact an external power source to provide power, and their positions correspond to the two first through holes 56 respectively.

[0086] A bidirectional screw 61 is installed within the receiving space 55, with its two ends supported on the inner wall of the receiving space 55 by bearings or other movable connections, and can rotate around its own axis. A second through hole 60 is provided on the movable seat 57, and the bidirectional screw 61 passes through the second through hole 60 of the movable seat 57; its length direction defines the moving direction of the socket body 5. A specially structured helical groove is machined on the outer periphery of the bidirectional screw 61. More precisely, the bidirectional screw 61 includes a shaft 69, which constitutes the main body of the bidirectional screw and has a basic cylindrical or near-cylindrical outline; on the outer cylindrical surface of the shaft 69, along its axial direction (i.e., Figure 17 The screw (in the FF direction shown) has a first helical groove 63 and a second helical groove 65 machined on it; the first helical groove 63 and the second helical groove 65 are arranged alternately in the same circumferential direction of the screw (usually referring to the view perpendicular to the axial direction), and a transition groove segment 70 is formed at the intersection of the projections; in the first helical groove and the second helical groove, the edges where the inner wall intersects with the bottom wall are all machined into chamfers to ensure that the inner contours of the first helical groove 63 and the second helical groove 65 are smoothly transitioned.

[0087] Each end of the shaft 69 is provided with a set of connectors 71 for reliably and rotatably mounting the entire bidirectional screw 61 onto the fixed socket body, allowing the bidirectional screw 61 to rotate freely around its own axis (i.e., the axial direction of the shaft 69). These two sets of connectors 71 constitute the rotational support points of the bidirectional screw 61.

[0088] The first set of connectors is located at one end of the shaft 69. This set of connectors 71 is designed as rods, characterized by a cross-sectional area that gradually decreases in size away from the center of the shaft 69, forming a structure similar to a tapered or stepped shaft. This design may help with stress distribution, weight reduction, easy bearing insertion, or to meet specific spatial constraints. The second set of connectors is located at the other end of the shaft 69. This set of connectors 71 is also rod-shaped. A rotating groove 72 is machined on its end face away from the shaft 69. The function of this rotating groove 72 is typically to accommodate and position a rotating pin, retaining ring, or drive key for transmitting torque (driving the rotation of the bidirectional screw 61) or for axial limiting, ensuring that the rotational movement of the bidirectional screw 61 within the socket body is precisely controlled and transmitted.

[0089] The socket body 5 is installed within the receiving cavity 13 of the base housing 1. A second fixing rod 10 is fixed to the bottom plate 11 of the base housing 1. The rod extends upward, with one end passing through the bottom of the main housing 54 and extending into the receiving space 55. A first abutting block 62 is fixed to the end of the second fixing rod 10 within the receiving space 55. The first abutting block 62 includes a receiving portion 66 and an abutting portion 67. The shape of the receiving portion 66 precisely matches the inner cavity of the first helical groove 63 and is embedded in the first helical groove 63. This ensures that the first helical groove 63 can effectively transmit motion to the bidirectional screw 61. The abutting portion 67 is located on the side of the receiving portion 66 facing the center of the bidirectional screw 61 and is designed as an inwardly concave curved surface. This curved surface contacts the bottom end face of the first helical groove 63, significantly improving the stability and force uniformity of the bidirectional screw 61 during rotation and reducing vibration and wear. It should be noted that the depth of the first spiral groove is not less than the depth of the second spiral groove, which can prevent the first abutting block 62 from moving along the first spiral groove and not disengaging from the first spiral groove and entering the second spiral groove.

[0090] The movable base 57 has a second abutment block 64 on the inner wall of the second through hole 60. The second abutment block 64 is designed as an arc-shaped strip structure and is embedded in the second spiral groove 65 on the outer periphery of the bidirectional screw 61. It should be noted that the position of the second abutment block 64 on the movable base 57 can also be customized according to actual production needs. For example, the second abutment block 64 can be set on the side wall of the movable base 57.

[0091] When the user rotates the upper rotating cover 3 and the drive ring 2, the entire socket body 5 moves relative to the base housing 1. At this time, the second fixing rod 10 and its first abutment block 62, which are fixed to the base housing 1, remain stationary. As the socket body 5 moves, the first abutment block 62, which is embedded in the first spiral groove 63, is guided by the first spiral groove 63 (spiral groove) to move. This movement forces the bidirectional screw 61 to rotate around its own axis.

[0092] When the bidirectional screw 61 rotates, the second abutment block 64, fixed on the movable base 57, engages within the second helical groove 65. The second abutment block 64 is thus guided by the second helical groove 65 (also a helical groove, and designed to move in conjunction with the first helical groove 63). This ultimately drives the second abutment block 64 and the entire movable base 57 to move linearly along the length of the bidirectional screw 61. The linear movement of the movable base 57 causes the two sets of plug terminals 58 on it to move synchronously, thereby allowing the plug terminals 58 to extend to the power supply position or retract to the storage position, and to precisely align and pass through the first through hole 56 at the top of the main housing 54.

[0093] Specifically, the housing 13 houses the core circuit board (not shown). A charging connector (not shown) is installed at a specific location on this circuit board. To facilitate external connection, the base plate 11 and bottom cover 6 of the base housing 1 have precisely cut openings at the corresponding charging connector locations. When the plug is connected to an external power socket through its plug terminal 58, the matching charging device can be inserted through the openings on the base plate 11 and bottom cover 6, forming a physical and electrical connection with the charging connector on the circuit board, thereby introducing external power into the device for power supply.

[0094] See Figure 19 The operation of this plug 100 is an intuitive rotary drive process, realizing the overall lifting and lowering of the socket body 5 and the automatic extension and retraction of the internal plug terminals 58:

[0095] When using:

[0096] Step 1: Rotate the top cover --- The user holds and rotates the top cover clockwise (or counterclockwise) 3.

[0097] Step 2: Drive ring 2 linkage --- the first engaging protrusion 31 at the bottom of the upper rotating cover 3 drives the engaged drive ring 2 to rotate synchronously.

[0098] Step 3: Socket body 5 lifting---The lifting guide rail 22 on the inner wall of the drive ring 2 acts on the embedded drive slider 51, converting the rotational motion into linear motion, pushing the entire socket body 5 to overcome the resistance of the return spring 68 and move upward along the guide rod 8. This process compresses the return spring 68 to store energy.

[0099] Step 4: Drive the bidirectional screw 61 to rotate --- While the socket body 5 moves upward as a whole, the second fixing rod 10 fixed to the base plate 11 and the first abutting block 62 at its end move downward relative to the moving socket body 5. The first abutting block 62 moves along the first helical groove 63 on the bidirectional screw 61. Due to the helical structure of the groove, the bidirectional screw 61 is forced to rotate around its axis.

[0100] Step 5: Plug terminals 58 extend – The rotational motion of the bidirectional screw 61, through the engagement of its second helical groove 65 with the second abutment block 64 on the movable seat 57, is converted into linear motion of the movable seat 57 along the screw axis (i.e., vertically upward). The movable seat 57 drives the two sets of plug terminals 58 on it to move upward synchronously.

[0101] Step Six: Locking in Position – When the socket body 5 rises to its fully extended position, the limiting notch 23 at the bottom of the drive ring 2 engages with the limiting stop 132 on the annular slide rail 131 of the base housing 1, generating a clear locking sensation and preventing the drive ring 2 from continuing to rotate. At this time, the plug terminal 58 has also moved precisely into position, passing through the first through hole 56 at the top of the main body housing 54, and is ready to be inserted into the power socket. At this point, the socket body 5 is fully extended and locked, and the internal plug terminal 58 is fully extended.

[0102] When storing:

[0103] Step 1: Unlock the rotating cover---The user applies a slightly larger rotational force to the upper rotating cover 3, causing the limiting notch 23 of the drive ring 2 to overcome the obstruction of the limiting block 132 and disengage from the engaged state. Then, rotate the upper rotating cover 3 in the opposite or the same direction as when it was extended.

[0104] Step 2: Drive ring 2 linkage --- the upper rotating cover 3 drives drive ring 2 to rotate.

[0105] Step 3: Socket body 5 rises and falls --- the compressed return spring 68 releases the stored energy, generating a downward restoring force, which acts on the sliding sleeve 53, pushing the entire socket body 5 smoothly and quickly retract into the receiving cavity 13 of the base housing 1 along the guide rod 8.

[0106] Step 4: Drive the bidirectional screw 61 to rotate in the opposite direction---While the socket body 5 retracts downwards, the second fixing rod 10 fixed to the base plate 11 and the first abutting block 62 at its end move upwards relative to the downward-moving socket body 5. The first abutting block 62 moves in the opposite direction along the first spiral groove 63, forcing the bidirectional screw 61 to rotate in the opposite direction.

[0107] Step 5: Plug terminal 58 retracts --- The reverse rotation of the bidirectional screw 61, through the cooperation of the second spiral groove 65 and the second abutment block 64, drives the moving seat 57 and plug terminal 58 to retract into the main body housing 54 along the screw axis (i.e., vertically downward).

[0108] Step Six: Locking in Position --- When the socket body 5 is fully retracted into the receiving cavity 13, the other limiting recess 23 or the same limiting recess 23 at the bottom of the drive ring 2 rotates to another position and engages with the corresponding limiting block 132, locking the position again. At this time, the socket body 5 is completely hidden, and the plug terminal 58 is also fully retracted and protected.

[0109] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0110] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways by rotation or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0111] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0112] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drive shaft for use in a retractable power plug, characterized in that: include: The shaft body has a first spiral groove and a second spiral groove formed along the axial direction on its outer surface. The first spiral groove and the second spiral groove have their orthographic projections in the same direction intersecting each other, and a transition groove segment is formed at the intersection of the projections; The first spiral groove is used to guide the first abutment block that cooperates with it to move axially along the shaft. The second spiral groove is used to guide the second abutment block that mates with it to move axially along the shaft. A connector, located at one end of the shaft, is used to rotatably mount the drive shaft to a power plug, allowing the drive shaft to rotate about the axial direction of the shaft.

2. The drive shaft according to claim 1, characterized in that: The connector is rod-shaped, and its cross-sectional area decreases in the direction away from the shaft.

3. The drive shaft according to claim 1, characterized in that: The connector is rod-shaped; a rotating groove is provided at the end of the connector away from the shaft.

4. The drive shaft according to claim 1, characterized in that: The inner walls and bottom walls of the first and second spiral grooves are all chamfered.

5. The drive shaft according to claim 1, characterized in that: The depth of the first spiral groove is equal to or greater than the depth of the second spiral groove, so as to prevent the first abutment block located in the first spiral groove from disengaging from the first spiral groove and entering the second spiral groove.

6. A transmission assembly for a retractable power plug, comprising a transmission shaft as described in any one of claims 1-5, characterized in that: Also includes The base housing, on which the first abutment block is fixedly installed; The first abutting block is embedded in the first spiral groove, so that when the first abutting block moves along the path of the first spiral groove, it can drive the shaft to rotate along its axial direction. When the first abutting block slides along the path of the first spiral groove and drives the shaft to rotate, the second abutting block located in the second spiral groove moves along the axial direction of the shaft.

7. The transmission assembly according to claim 6, characterized in that: The first abutting block includes a receiving portion and an abutting portion. The receiving portion matches the shape of the inner cavity of the first spiral groove, and the abutting portion is an inwardly concave curved surface that contacts the bottom end face of the first spiral groove.

8. The transmission assembly according to claim 6, characterized in that: It also includes the drive assembly and the socket body; The drive assembly and socket body are both housed within the base housing; The drive component is configured to respond to user operation and drive the socket body to move along a preset direction; The socket body includes: The main body shell has at least one first through hole; The movable seat is slidably disposed within the main body housing; The plug terminal is fixed to the movable base and corresponds to the position of the first through hole; The movable seat is fixedly provided with the second abutment block, which is embedded in the second spiral groove; When the socket body moves, the first abutment block forces the shaft to rotate through the engagement of the first spiral groove; the rotation of the shaft is achieved through the engagement of the second spiral groove and the second abutment block, causing the shaft of the drive moving seat to move axially, thereby causing the plug terminal to extend or retract into the first through hole.

9. The transmission assembly according to claim 8, characterized in that: The drive assembly includes a drive ring and an upper rotating cover; The base housing forms a receiving cavity with a top opening, the drive ring is rotatably disposed in the receiving cavity, and the upper rotating cover covers the opening of the receiving cavity and is connected to the drive ring for synchronous rotation; The socket body is movably disposed within the receiving cavity. A drive slider is provided on the outer side of the socket body, and a lifting guide rail is provided on the inner wall of the drive ring. The drive slider slides in cooperation with the lifting guide rail so that the socket body is pushed to move along a preset direction when the drive ring rotates.

10. The transmission assembly according to claim 9, characterized in that: The upper rotating cover is provided with a first engaging protrusion, and the drive ring is provided with a first engaging groove that matches the first engaging protrusion.

Images