Wire telescopic structure

Abstract

The invention provides a wire telescopic structure which comprises a shell, a wheel core, a wire, a coil spring, a guide part, a rotating part and a swing part, a containing space is formed in the shell, and a first sliding groove is formed in the inner side wall of the shell; the wheel core is rotationally connected to the shell, and a positioning clamping groove is formed in the periphery of the wheel core. The guiding piece is arranged in the middle of the first sliding groove, a gap is formed between the outer circumferential side of the guiding piece and the inner circumferential side of the first sliding groove, an annular channel is formed, a limiting clamping groove is formed in one side of the guiding piece, and a limiting protrusion is arranged on the inner side wall, facing the limiting clamping groove, of the first sliding groove. The annular channel comprises a first guide channel section, a second guide channel section, a third guide channel section and a fourth guide channel section which are sequentially communicated in the annular direction of the annular channel, and the first guide channel section and the fourth guide channel section are located on the outer sides of the limiting clamping groove and the limiting protrusion. The second guide channel section and the third guide channel section are located between the limiting clamping groove and the limiting protrusion, and the rotating piece is rotationally connected to the inner side wall of the shell.

Description

Technical Field

[0001] This invention relates to the field of data cable technology, and more particularly to a cable telescopic structure. Background Technology

[0002] With the continuous advancement of technology, mobile electronic devices such as smartphones and tablets have become deeply integrated into people's daily lives and work, becoming indispensable core tools. The high-frequency use of these devices relies on a stable power supply; therefore, the demand for convenient charging devices that allow users to charge anytime, anywhere is growing.

[0003] To meet the demand for convenient charging, retractable cable chargers have gradually become one of the mainstream choices in the market due to their unique structural design. The core feature of this type of charger is a retractable cable structure that can automatically retract or extend. By storing the data cable inside the casing, it effectively solves the problems of traditional data cables being long, messy, and inconvenient to store, significantly improving ease of use and space utilization, and meeting modern users' pursuit of a portable and tidy user experience.

[0004] However, the retractable cable structure used in existing retractable chargers still has significant drawbacks. Specifically, once the data cable is stretched to the user's desired length, it cannot stably maintain that length. Under the elastic restoring force of the internal coil spring, it is prone to unexpected retraction, causing the data cable to rewind back into the casing. This problem directly affects the continuity and stability of the user's charging operation, causing considerable inconvenience to consumers and limiting the improvement of the user experience of retractable chargers.

[0005] Therefore, it is necessary to provide a cable extension structure that enables stable extension and retraction of the data cable to solve the problem that existing structures cannot achieve stable positioning after the data cable is extended. Summary of the Invention

[0006] The purpose of this invention is to provide a cable extension structure that enables stable extension and retraction of data cables, thereby solving the problem that existing structures cannot achieve stable positioning after the data cable is extended.

[0007] To achieve the above objectives, the present invention provides a wire telescopic structure, including a housing, a wheel core, a wire, a coil spring, a guide member, a rotating member, and a swing member. The housing has an accommodating space, and its inner sidewall has a first sliding groove. The wheel core is disposed within the accommodating space and rotatably connected to the housing. The outer circumference of the wheel core has several spaced positioning slots. The wire is wound around the wheel core, with one end fixedly connected to the wheel core and the other end extending to the outside of the housing. The coil spring connects the housing and the wheel core, and applies an elastic force to the wheel core in the direction of rotation to drive it to rotate and return to its original position. The guide member is disposed within the accommodating space. At the middle position of the first sliding groove, the outer periphery of the guide member and the inner periphery of the first sliding groove are spaced apart to form an annular channel. A limiting groove is provided on one side of the guide member. A limiting protrusion is provided on the inner wall of the first sliding groove facing the limiting groove. The annular channel includes a first guide channel segment, a second guide channel segment, a third guide channel segment, and a fourth guide channel segment connected sequentially along its annular direction. The first guide channel segment and the fourth guide channel segment are located outside the limiting groove and the limiting protrusion. The second guide channel segment and the third guide channel segment are located between the limiting groove and the limiting protrusion. One end of the first guide channel segment intersects with one end of the second guide channel segment. A first locking position is formed; the other end of the second guide channel segment intersects with one end of the third guide channel segment to form a second locking position; the other end of the third guide channel segment intersects with one end of the fourth guide channel segment to form a third locking position; the other ends of the first guide channel segment and the fourth guide channel segment intersect; the rotating member is disposed within the accommodating space, and one end of the rotating member is rotatably connected to the inner wall of the housing; the other end of the rotating member is provided with a positioning protrusion, which abuts against the outer peripheral side of the wheel core; one end of the swing member is rotatably connected to the rotating member, and the other end of the swing member is inserted into the annular channel; by stretching the wire and driving the wheel core to rotate, the... The outer peripheral edge of the wheel core or the inner wall of the positioning slot applies a force to the positioning protrusion, causing the rotating component to rotate and drive the swinging component to swing, so that the end of the swinging component abuts against the first locking position. By releasing the wire, the wheel core rotates in the opposite direction under the action of the coil spring, so as to drive the rotating component to rotate and drive the swinging component to swing, so that the swinging component is locked in the second locking position, and the positioning protrusion is inserted into the positioning slot to lock the extension position of the wire. By stretching the wire again and driving the wheel core to rotate, the rotating component is driven to rotate and drive the swinging component to swing, so that the positioning protrusion exits the positioning slot and the swinging component abuts against the third locking position.By releasing the wire again, the wheel core rotates in the opposite direction under the action of the coil spring, thereby driving the rotating component to rotate and causing the oscillating component to move along the fourth guide channel segment, thus allowing the wire to be freely wound up.

[0008] Preferably, the sidewall of the limiting protrusion is provided with an abutment position located in the third guide channel section at the position facing the second locking position. When the wire is stretched again and the wheel core is rotated, causing the swing member to exit the second locking position, the swing member first abuts against the abutment position, and then moves from the abutment position along the third guide channel section to abut against the third locking position. The abutment position is used to prevent the swing member from moving from the second locking position into the second guide channel section.

[0009] Preferably, the guide includes a first guide portion and a second guide portion, one end of the first guide portion and one end of the second guide portion meet and join together, the other ends of the first guide portion and the other ends of the second guide portion extend in a gradually moving away direction, and the limiting groove is formed between the other ends of the first guide portion and the other ends of the second guide portion. Preferably, the inner wall of the housing is further provided with a second sliding groove, and the intersection of the first guide channel segment and the fourth guide channel segment is connected to one end of the second sliding groove. The second sliding groove is used for the swing member to slide into the fourth guide channel segment when the wire is freely wound. Preferably, the housing includes an upper cover and a lower cover, the upper cover and the lower cover are connected and surround the accommodating space, and the first sliding groove and the second sliding groove are disposed on the inner sidewall of the upper cover. Preferably, the swing member includes a swing body, a first connecting convex shaft portion and a second connecting convex shaft portion. The swing body is located between the rotating member and the upper cover. The first connecting convex shaft portion is disposed at one end of the swing body and faces the swing member. The rotating member is provided with an insertion hole. The first connecting convex shaft portion can be rotatably inserted into the swing member. The second connecting convex shaft portion is disposed at the other end of the swing body and faces the upper cover. The second connecting convex shaft portion can be movably inserted into the annular channel or the second sliding groove. Preferably, the wire telescopic structure further includes an elastic element disposed within the accommodating space and connected to the housing, and the elastic element abutting against the rotating member. The elastic element is used to apply an elastic force to the rotating member to drive it to rotate and insert the positioning protrusion into the positioning slot. When the wire is stretched and the wheel core is rotated, the inner sidewall of the positioning slot can push the positioning protrusion out of the positioning slot and cause the rotating member to rotate and squeeze the elastic element, or the outer peripheral edge of the rotating member abuts against the positioning protrusion and causes the rotating member to squeeze the elastic element. Preferably, the positioning protrusion is provided with a force-receiving auxiliary structure, which is a sloped structure or an arc structure. The force-receiving auxiliary structure is used to push the side wall of the positioning slot to assist the positioning protrusion in exiting the positioning slot. Preferably, the wheel core includes a wheel core disc body, a first wheel core annular protrusion, and a second wheel core annular protrusion. The wheel core disc body is rotatably connected to the housing. The first wheel core annular protrusion protrudes from one side of the wheel core disc body and has an installation space within it. The coil spring is disposed within the installation space. The second wheel core annular protrusion protrudes from the other side of the wheel core disc body. A plurality of positioning slots are arranged at equal intervals along the circumferential direction of the second wheel core annular protrusion on the outer periphery of the second wheel core annular protrusion. Preferably, the wire telescopic structure further includes a cover plate, which is connected to the annular protrusion of the first wheel core and covers the coil spring. Compared with the prior art, the wire telescopic structure of the present invention, through the coordinated cooperation of the housing, wheel core, rotating component, swing component, guide component, and coil spring, when the wire is stretched and the wheel core rotates, the outer peripheral edge of the wheel core or the inner side wall of the positioning groove applies a force to the positioning protrusion of the rotating component, causing the rotating component to drive the swing component to move along the annular channel of the guide component, so that the end of the swing component abuts against the first locking position of the annular channel; when the wire is released and the wheel core rotates in the opposite direction under the action of the coil spring, the swing component can be accurately locked in the second locking position of the annular channel, and at the same time the positioning protrusion is inserted into the positioning groove of the wheel core, forming a double positioning and locking structure, which can firmly fix the extension position of the wire, completely avoiding the problem of unexpected retraction of the wire under the action of the coil spring in the existing structure, and ensuring the continuity and stability of the user's charging and other use processes. Secondly, the wire telescopic structure of the present invention, by setting a guide member in the first sliding groove of the housing, and through the reasonable layout of the first guide channel segment, the second guide channel segment, the third guide channel segment, and the fourth guide channel segment, forms an annular channel adapted to the movement trajectory of the swinging component. Combined with the first locking position, the second locking position, and the third locking position formed by the intersection of the channel segments, it provides precise guidance for the swinging component's movement. Users only need to perform two simple operations of stretching and releasing the wire to complete the switching between wire extension locking and unlocking rewinding, eliminating the need for additional cumbersome operations and significantly improving ease of use, meeting the operational needs of modern users for portable devices. Furthermore, the limiting slot of the guide member cooperates with the limiting protrusion of the first sliding groove to further limit the movement range of the swinging component and prevent the swinging component from deviating from its intended path. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the wire telescopic structure of the present invention.

[0011] Figure 2 This is an exploded view of the wire telescopic structure of the present invention.

[0012] Figure 3 This is a partial structural diagram of the wire telescopic structure of the present invention.

[0013] Figure 4 This is a three-dimensional structural diagram of the top cover of the present invention.

[0014] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0015] Figure 6 This is a three-dimensional structural diagram of the wheel core of the present invention.

[0016] Figure 7 This is a three-dimensional structural diagram of the swing component of the present invention.

[0017] Figure 8This is a structural diagram of the top cover, rotating member, and swinging member of the present invention when the wire is in the initial winding state.

[0018] Figure 9 yes Figure 8 The diagram shown is a structural diagram after removing the rotating component.

[0019] Figure 10 yes Figure 8 The diagram shows the structure when the oscillating component swings due to the tension of the wire and abuts against the first locking position.

[0020] Figure 11 yes Figure 10 The diagram shows the structure when the released wire causes the swinging component to swing and lock into the second locking position.

[0021] Figure 12 yes Figure 11 The diagram shows the structure when the swinging component swings and abuts against the third locking position due to the re-stretching of the wire.

[0022] Figure 13 This is a structural diagram of the rotating component of the present invention when its positioning protrusion is inserted into the positioning slot of the wheel core. Detailed Implementation

[0023] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] Please see Figures 1 to 13 This invention provides a wire telescopic structure 100, including a housing 1, a wheel core 2, a wire 3, a coil spring 4, a guide 5, a rotating component 6, and a swing component 7. The housing 1 has an accommodating space 11, and the inner sidewall of the housing 1 has a first sliding groove 121. The accommodating space 11 provides a place for the installation of each component, ensuring that each component can be assembled in an orderly manner and operate normally. The first sliding groove 121 provides a preset trajectory for the installation of the guide 5 and the sliding of the swing component 7, ensuring the stability and accuracy of the movement of the swing component 7.

[0025] The wheel core 2 is set in the accommodating space 11 and rotatably connected to the housing 1. The outer periphery of the wheel core 2 is provided with several positioning slots 21 arranged at intervals. The wheel core 2 adopts a rotatable connection, which allows it to rotate flexibly relative to the housing 1, providing a basis for the winding and unwinding of the wire 3. The several positioning slots 21 arranged at intervals can cooperate with the positioning protrusions 61 on the rotating part 6 to realize the positioning of the wire 3 under different extension lengths, meeting the diverse length requirements of users.

[0026] The wire 3 is wound around the wheel core 2, with one end of the wire 3 fixedly connected to the wheel core 2 and the other end of the wire 3 extending to the outside of the housing 1. The winding of the wire 3 around the wheel core 2 can make full use of the accommodating space 11 and achieve orderly storage of the wire 3. The fixed connection of one end of the wire 3 to the wheel core 2 can ensure that the wire 3 can be wound or released synchronously when the wheel core 2 rotates. The other end extending out of the housing 1 makes it convenient for users to connect external devices for charging and other operations.

[0027] The coil spring 4 is connected between the housing 1 and the wheel core 2. The coil spring 4 is used to apply an elastic force to the wheel core 2 in the rotation direction to drive it to rotate and reset. As a reset power component, the coil spring 4 is connected to the housing 1 and the wheel core 2 at its two ends respectively. When the wheel core 2 is driven to rotate by the wire 3, the coil spring 4 deforms and stores elastic potential energy. When the external force is released, the coil spring 4 releases the elastic potential energy to drive the wheel core 2 to rotate in the opposite direction, thereby realizing the automatic winding of the wire 3 and ensuring the automatic reset function of the structure.

[0028] The guide member 5 is located at the middle of the first sliding groove 121. The outer periphery of the guide member 5 is spaced from the inner periphery of the first sliding groove 121, forming an annular channel 51. A limiting groove 52 is provided on one side of the guide member 5. A limiting protrusion 121a is provided on the inner wall of the first sliding groove 121 facing the limiting groove 52. The annular channel 51 includes, along its annular direction, a first guide channel segment 511, a second guide channel segment 512, a third guide channel segment 513, and a fourth guide channel segment 514 connected sequentially. The first guide channel segment 511 and the fourth guide channel segment 514 are located at the limiting groove 52 and the limiting protrusion, respectively. On the outside of 121a, the second guide channel segment 512 and the third guide channel segment 513 are located between the limiting slot 52 and the limiting protrusion 121a. One end of the first guide channel segment 511 intersects with one end of the second guide channel segment 512 to form a first locking position 515. The other end of the second guide channel segment 512 intersects with one end of the third guide channel segment 513 to form a second locking position 516. The other end of the third guide channel segment 513 intersects with one end of the fourth guide channel segment 514 to form a third locking position 517. The other end of the first guide channel segment 511 intersects with the other end of the fourth guide channel segment 514.

[0029] The guide member 5 is located in the middle of the first sliding groove 121, which can accurately plan the direction of the annular channel 51. The annular channel 51 provides a dedicated motion path for the swing member 7. The sequential connection of the four guide channel segments 511, 512, 513 and 514 and the formation of each locking position can realize the precise positioning and trajectory switching of the swing member 7 at different motion stages. The cooperation between the limiting slot 52 and the limiting protrusion 121a can limit the range of motion of the swing member 7, prevent it from deviating from the preset trajectory, and ensure the accuracy of the coordinated action of each component.

[0030] The rotating component 6 is disposed within the accommodating space 11, and one end of the rotating component 6 is rotatably connected to the inner side wall of the housing 1. The other end of the rotating component 6 is provided with a positioning protrusion 61, which abuts against the outer peripheral side of the wheel core 2. The rotating component 6 is rotatably connected to the housing 1 at one end, enabling it to rotate stably relative to the housing 1. The positioning protrusion 61 at the other end abuts against the outer peripheral side of the wheel core 2, which can realize the linkage transmission between the rotation of the wheel core 2 and the rotation of the rotating component 6. The rotation of the wheel core 2 drives the rotating component 6 to move synchronously through the positioning protrusion 61, providing power transmission for the subsequent swing of the swing component 7.

[0031] One end of the swing member 7 is rotatably connected to the rotating member 6, and the other end of the swing member 7 is inserted into the annular channel 51. As an intermediate transmission component connecting the rotating member 6 and the guide member 5, the swing member 7 is rotatably connected to the rotating member 6 to ensure that the rotation of the rotating member 6 can be smoothly transmitted to the swing member 7, causing the swing member 7 to swing synchronously. The other end is inserted into the annular channel 51, so that the movement of the swing member 7 is constrained by the guide member 5, ensuring that it moves along the preset trajectory of the annular channel 51, thereby achieving the coordination of power transmission and trajectory guidance.

[0032] By stretching the wire 3 and causing the wheel core 2 to rotate, the outer peripheral edge of the wheel core 2 or the inner wall of the positioning groove 21 applies force to the positioning protrusion 61, causing the rotating component 6 to rotate and drive the swinging component 7 to swing. This causes the end of the swinging component 7 to abut against the first locking position 515. By releasing the wire 3, the wheel core 2 rotates in the opposite direction under the action of the coil spring 4, causing the rotating component 6 to rotate and drive the swinging component 7 to swing. The swinging component 7 is then locked onto the second locking position 516, and the positioning protrusion 61 is inserted into the positioning groove 21 to lock the extended position of the wire 3. By stretching the wire 3 again and causing the wheel core 2 to rotate, the rotating component... The rotation of component 6 causes the oscillating component 7 to swing, causing the positioning protrusion 61 to exit the positioning slot 21 and the oscillating component 7 to abut against the third locking position 517. By releasing the wire 3 again, the wheel core 2 rotates in the opposite direction under the action of the coil spring 4, thereby driving the rotating component 6 to rotate and driving the oscillating component 7 to move along the fourth guide channel section 514, so that the wire 3 can be freely wound up. This transmission logic realizes the complete action cycle of wire 3 stretching, locking, stretching again to unlock, and releasing and winding up through the sequential linkage of each component. The abutting and locking of each locking position ensures the stable state of different action stages and guarantees the reliability and smoothness of the wire 3's extension and retraction process.

[0033] Please see Figures 5 to 12In one embodiment, the sidewall of the limiting protrusion 121a facing the second locking position 516 is provided with an abutment position 121b located in the third guide channel section 513. When the wire 3 is stretched again and the wheel core 2 is rotated, causing the swing member 7 to exit the second locking position 516, the swing member 7 first abuts against the abutment position 121b, and then moves from the abutment position 121b along the third guide channel section 513, thereby abutting against the third locking position 517. The abutment position 121b is used to prevent the swing member 7 from moving from the second locking position 516 into the second guide channel section 512. The setting of the abutment position 121b can accurately guide and restrict the movement direction of the swing member 7, avoiding the swing member 7 from reversing and entering the second guide channel section 512 after exiting the second locking position 516, which would cause the movement to become disordered. This ensures that the swing member 7 can accurately move along the third guide channel section 513 to the third locking position 517, ensuring the smooth progress of the unlocking process.

[0034] Please see Figure 4 and Figure 5 In one embodiment, the guide member 5 includes a first guide portion 53 and a second guide portion 54. One end of the first guide portion 53 and one end of the second guide portion 54 meet and connect. The other ends of the first guide portion 53 and the second guide portion 54 extend in a gradually moving direction, and a limiting groove 52 is formed between the other ends of the first guide portion 53 and the second guide portion 54. By setting the first guide portion 53 and the second guide portion 54, the guide member 5 can accurately form the required limiting groove 52 in the extension manner of the two guide portions, ensuring the matching accuracy between the limiting groove 52 and the limiting protrusion 121a, and improving the overall guiding stability of the guide member 5.

[0035] Please see Figure 4 and Figure 5 In one embodiment, the inner wall of the housing 1 is further provided with a second sliding groove 122. The intersection of the first guide channel segment 511 and the fourth guide channel segment 514 is connected to one end of the second sliding groove 122. The second sliding groove 122 is used for the swing member 7 to slide into the fourth guide channel segment 514 when the wire 3 is freely wound. The setting of the second sliding groove 122 provides the swing member 7 with additional movement space during the winding stage of the wire 3, so that the swing member 7 can smoothly slide into the second sliding groove 122 from the fourth guide channel segment 514 after unlocking, avoiding interference with other components during the winding process, ensuring the smoothness of the free winding of the wire 3, and further optimizing the spatial layout of each component. The second sliding groove 122 has an arc-shaped structure, but is not limited to this.

[0036] Please see Figures 1 to 4In one embodiment, the housing 1 includes an upper cover 12 and a lower cover 13. The upper cover 12 and the lower cover 13 are connected and enclose a receiving space 11. A first sliding groove 121 and a second sliding groove 122 are disposed on the inner sidewall of the upper cover 12. The housing 1 adopts a split structure of the upper cover 12 and the lower cover 13, which facilitates the assembly of each internal component and subsequent maintenance. The connection between the upper cover 12 and the lower cover 13 to enclose the receiving space 11 can ensure the sealing and stability of each component after installation. The placement of the first sliding groove 121 and the second sliding groove 122 on the inner sidewall of the upper cover 12 can make the assembly of the guide 5 and the swinging component 7 more targeted and improve the accuracy of the motion trajectory.

[0037] Please see Figure 2 , Figure 7 , Figure 9 and Figure 13 In one embodiment, the swing member 7 includes a swing body 71, a first connecting convex shaft portion 72, and a second connecting convex shaft portion 73. The swing body 71 is located between the rotating member 6 and the upper cover 12. The first connecting convex shaft portion 72 is disposed at one end of the swing body 71 and faces the swing member 7. The rotating member 6 is provided with an insertion hole 62. The first connecting convex shaft portion 72 can be rotatably inserted into the swing member 7. The second connecting convex shaft portion 73 is disposed at the other end of the swing body 71 and faces the upper cover 12. The second connecting convex shaft portion 73 can be movably inserted into the annular channel 51 or the second sliding groove 122. The swing body 71 serves as a connector and load-bearer. The first connecting convex shaft 72 and the insertion hole 62 of the rotating member 6 achieve a rotatable connection between the two, and the design that allows relative rotation ensures the flexibility of power transmission. The second connecting convex shaft 73 enables the sliding engagement between the swing member 7 and the annular channel 51 and the second sliding groove 122, ensuring the smooth movement of the swing member 7. At the same time, the layout of the swing body 71 between the rotating member 6 and the upper cover 12 makes reasonable use of the accommodating space 11 and avoids interference with other components.

[0038] Furthermore, there is a gap between the first connecting convex shaft portion 72 and the inner wall of the insertion hole 62; the setting of this gap can reduce the friction between the first connecting convex shaft portion 72 and the inner wall of the insertion hole 62, avoid the jamming phenomenon during the relative rotation of the two, and at the same time, it can accommodate the small errors generated during the component processing and assembly process, and improve the adaptability and movement flexibility of the connection between the swinging component 7 and the rotating component 6.

[0039] Please see Figures 8 to 13In one embodiment, the wire telescopic structure 100 further includes an elastic element 8, which is disposed in the accommodating space 11 and connected to the housing 1. The elastic element 8 abuts against the rotating member 6. The elastic element 8 is used to apply an elastic force to the rotating member 6 to drive it to rotate and insert the positioning protrusion 61 into the positioning slot 21. When the wire 3 is stretched and the wheel core 2 is driven to rotate, the inner sidewall of the positioning slot 21 can push the positioning protrusion 61 out of the positioning slot 21 and cause the rotating member 6 to rotate and squeeze the elastic element 8. Alternatively, the outer peripheral edge of the rotating member 6 abuts against the positioning protrusion 61 and causes the rotating member 6 to squeeze the elastic element 8. The addition of elastic element 8 provides auxiliary positioning elastic force for rotating element 6, ensuring that when the wire 3 is not stretched by external force, the positioning protrusion 61 tends to move in the direction of insertion into positioning slot 21 under the action of elastic element 8, thus improving the reliability of the locking state of wire 3. When the wire 3 is stretched, the wheel core 2 pushes the positioning protrusion 61 through the inner wall or outer peripheral edge of positioning slot 21, causing rotating element 6 to rotate and squeeze elastic element 8. At this time, elastic element 8 stores elastic potential energy. When the external force is released, the elastic potential energy of elastic element 8 can assist rotating element 6 in resetting, further ensuring the accurate resetting of the actions of each component.

[0040] However, this is not a limitation. For example, in other alternative embodiments, the rotating member 6 may also adopt an elastically deformable structure. The rotating member 6 abuts between the inner wall of the upper cover 12 of the housing and the outer peripheral edge of the rotating member 6. When the wire 3 is stretched and the wheel core is rotated, the inner wall of the positioning slot 21 can push the positioning protrusion 61 out of the positioning slot 21 and cause the rotating member 6 to rotate and be deformed by pressure. Alternatively, the outer peripheral edge of the rotating member 6 abuts the positioning protrusion 61 and causes the rotating member 6 to be deformed by pressure.

[0041] Specifically, when the positioning protrusion 61 is inserted into the positioning slot 21, there is a gap between the positioning protrusion 61 and the inner wall of the positioning slot 21. This gap can prevent jamming caused by excessive contact between the positioning protrusion 61 and the inner wall of the positioning slot 21, ensuring that when the wire 3 is stretched, the inner wall of the positioning slot 21 can smoothly push the positioning protrusion 61 out of the positioning slot 21. At the same time, it can also adapt to the slight displacement during the rotation of the wheel core 2, improving the adaptability of the positioning structure.

[0042] Please see Figure 13In one embodiment, the positioning protrusion 61 is provided with a force-receiving auxiliary structure 611. The force-receiving auxiliary structure 611 is a sloped structure or an arc structure. The force-receiving auxiliary structure 611 is used to push the side wall of the positioning slot 21 so that the auxiliary positioning protrusion 61 can exit the positioning slot 21. The sloped or arc structure of the force-receiving auxiliary structure 611 can change the force direction when the side wall of the positioning slot 21 pushes the positioning protrusion 61, converting the lateral pushing force into the driving force to drive the positioning protrusion 61 to exit, reducing the resistance in the pushing process, so that the positioning protrusion 61 can exit the positioning slot 21 more smoothly, and improving the convenience and smoothness of the unlocking action.

[0043] Please see Figure 2 and Figure 6 In one embodiment, the wheel core 2 includes a wheel core disc body 22, a first wheel core annular protrusion 23, and a second wheel core annular protrusion 24. The wheel core disc body 22 is rotatably connected to the housing 1. The first wheel core annular protrusion 23 protrudes from one side of the wheel core disc body 22 and has an installation space 231 inside. A coil spring 4 is disposed in the installation space 231. The second wheel core annular protrusion 24 protrudes from the other side of the wheel core disc body 22. A plurality of positioning slots 21 are arranged at equal intervals along the circumferential direction of the second wheel core annular protrusion 24 on the outer periphery of the second wheel core annular protrusion 24. The wheel core disc body 22 provides the foundation for overall rotation. The installation space 231 in the first wheel core annular protrusion 23 provides a dedicated installation position for the coil spring 4, ensuring the stability and safety of the coil spring 4 after assembly and avoiding interference between the coil spring 4 and other components. The second wheel core annular protrusion 24 provides a carrier for the setting of the positioning slot 21. The equally spaced positioning slots 21 can achieve uniform positioning of different extension lengths of the wire 3, improving the user experience.

[0044] Please see Figure 2 and Figure 3 In one embodiment, the wire telescopic structure 100 further includes a cover plate 9, which is connected to the annular protrusion 23 of the first wheel core and covers the coil spring 4. The cover plate 9 can seal and protect the coil spring 4, preventing it from leaving the installation space 231 during rotation. It can also prevent external dust and debris from entering the installation area of ​​the coil spring 4, affecting its elastic performance and service life, and ensuring the long-term stable operation of the coil spring 4.

[0045] It is worth noting that the shape of the channel formed by the intersection and connection of the second guide channel segment 512 and the third guide channel segment 513, and the shape of the channel formed by the intersection and connection of the first guide channel segment 511 and the fourth guide channel segment 514 are similar to "V", "U" or arc, and the indentations face the same direction. Please see Figures 1 to 13 The specific working principle of the wire telescopic structure 100 of the present invention is as follows: Phase 1: Wire 3 stretching phase. When the user stretches the wire 3 outward from the housing 1, the wire 3 drives the wheel core 2 to rotate relative to the housing 1. During the rotation of the wheel core 2, its outer peripheral edge or the inner wall of the positioning slot 21 applies a lateral force to the positioning protrusion 61 at the end of the rotating component 6. Under this force, the rotating component 6 rotates around its connection end with the housing 1, simultaneously driving the swinging component 7 connected to it to swing synchronously. The second connecting convex shaft portion 73 of the swinging component 7 moves along the first guide channel segment 511 of the annular channel 51 of the guide component 5, and finally abuts against the first locking position 515 formed by the intersection of the first guide channel segment 511 and the second guide channel segment 512. At this time, the coil spring 4 deforms due to the rotation of the wheel core 2 and stores elastic potential energy. In addition, during this process, different positioning slots 21 continuously collide with the positioning protrusion 61 at the end of the rotating component 6, which can produce a clicking sound and enhance the user's operating feel.

[0046] Phase Two: Cable 3 Locking Phase. When the user releases cable 3, the coil spring 4 releases its stored elastic potential energy, causing the wheel core 2 to rotate in the opposite direction. The reverse rotation of the wheel core 2 is transmitted to the rotating component 6 through the positioning protrusion 61, causing the rotating component 6 to rotate in the opposite direction and drive the swing component 7 to continue swinging. The second connecting shaft portion 73 of the swing component 7 moves from the first locking position 515 along the second guide channel section 512 and finally locks into the second locking position 516 formed by the intersection of the second guide channel section 512 and the third guide channel section 513. At the same time, the positioning protrusion 61 on the rotating component 6 is precisely inserted into the positioning groove 21 on the outer periphery of the wheel core 2, forming a double positioning structure. The extended position of the cable 3 is firmly locked, and the user can stably use the cable 3 of this length for related operations.

[0047] The third stage: the re-stretching and unlocking stage. When the user needs to adjust the length of the cable 3 or retract the cable 3, the cable 3 is stretched outward again, causing the wheel core 2 to rotate again. The rotation of the wheel core 2 causes the inner wall of the positioning slot 21 to push the positioning protrusion 61. With the help of the force-receiving auxiliary structure 611 on the positioning protrusion 61, the positioning protrusion 61 smoothly exits the positioning slot 21. At the same time, the rotating part 6 continues to rotate under the drive of the wheel core 2 and drives the swinging part 7 to swing. The second connecting convex shaft part 73 of the swinging part 7 first abuts against the abutment position 121b on the limiting protrusion 121a to prevent it from entering the second guide channel section 512 in the opposite direction. Then it moves along the third guide channel section 513 and abuts against the third locking position 517 formed by the intersection of the third guide channel section 513 and the fourth guide channel section 514, completing the unlocking of the cable 3 from the locked state.

[0048] Phase Four: Release and Rewinding. The user releases the wire 3 again, and the coil spring 4 continues to release its elastic potential energy, causing the wheel core 2 to rotate in the opposite direction. The rotating component 6 rotates in the opposite direction simultaneously, driving the oscillating component 7 to move along the fourth guide channel section 514. Finally, the oscillating component 7 slides from the fourth guide channel section 514 into the second sliding groove 122 connected to it. At this time, the positioning protrusion 61 no longer limits the wheel core 2, and the wheel core 2 rotates freely under the continuous drive of the coil spring 4, winding the wire 3 orderly onto the wheel core 2, realizing the automatic and smooth rewinding of the wire 3. Throughout the entire working process, the elastic component 8 always applies an elastic force to the rotating component 6 to drive it to rotate and to insert the positioning protrusion 61 into the positioning slot 21, ensuring the accurate reset and stable operation of each stage of the action. When the wire 3 is retracted to its initial contracted state, if the elastic force applied by the elastic element 8 to the rotating element 6 is insufficient to allow the positioning protrusion 61 to insert into the positioning slot 21, during the process of the coil spring 4 driving the wheel core 2 to rotate in the opposite direction, the outer peripheral edge of the wheel core 2 abuts against the rotating element 6 and rotates to squeeze the elastic element 8, or pushes the positioning protrusion 61 out of the positioning slot 21 through the inner wall of the positioning slot 21, causing the rotating element 6 to rotate and squeeze the elastic element 8, and a clicking sound may occur at the same time.

[0049] In summary, the cable telescopic structure 100 of the present invention, through the coordinated cooperation of the housing 1, wheel core 2, rotating member 6, swing member 7, guide member 5, and coil spring 4, when the cable 3 is stretched and the wheel core 2 is rotated, the outer peripheral edge of the wheel core 2 or the inner wall of the positioning groove 21 applies a force to the positioning protrusion 61 of the rotating member 6, causing the rotating member 6 to drive the swing member 7 to move along the annular channel 51 of the guide member 5, so that the end of the swing member 7 abuts against the first locking position 515 of the annular channel 51; when the cable 3 is released and the wheel core 2 rotates in the opposite direction under the action of the coil spring 4, the swing member 7 can be accurately locked in the second locking position 516 of the annular channel 51, and at the same time the positioning protrusion 61 is inserted into the positioning groove 21 of the wheel core 2, forming a double positioning and locking structure, which can firmly fix the extended position of the cable 3, completely avoiding the problem of the cable 3 unexpectedly retracting under the action of the coil spring 4 in the existing structure, and ensuring the continuity and stability of the user's charging and other use processes. Secondly, the wire telescopic structure 100 of the present invention, by setting a guide member 5 in the first sliding groove 121 of the housing 1, and through the reasonable layout of the first guide channel segment 511, the second guide channel segment 512, the third guide channel segment 513, and the fourth guide channel segment 514, forms an annular channel 51 that adapts to the movement trajectory of the swinging member 7. Combined with the first locking position 515, the second locking position 516, and the third locking position 517 formed by the intersection of the channel segments, it provides precise guidance for the swinging of the swinging member 7. Users only need to perform two simple operations of stretching and releasing the wire 3 to complete the switching between extending and locking the wire 3 and unlocking and rewinding it, without any additional cumbersome operations, significantly improving ease of use and meeting the operational needs of modern users for portable devices. Furthermore, the limiting slot 52 of the guide member 5 cooperates with the limiting protrusion 121a of the first sliding groove 121 to further limit the movement range of the swinging member 7 and prevent the swinging member 7 from deviating from its intended path.

[0050] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A wire extension structure, characterized by, The utility model provides a kind of winding spring device, including: Shell, the shell is equipped with accommodation space inside, the inner side wall of the shell is equipped with first sliding groove; Wheel core, the wheel core is set in the accommodation space and is rotationally connected on the shell, the outer periphery of the wheel core is equipped with several interval arrangement positioning slot; Wire, the wire is wound and set on the wheel core, and one end of the wire is fixedly connected with the wheel core, the other end of the wire is stretched to the outside of the shell; Coil spring, the coil spring is connected between the shell and the wheel core, the coil spring is used to exert elastic force on the wheel core in the direction of rotation of the wheel core to drive it to reset; Guide, the guide is set at the middle position of the first sliding groove, the outer periphery side of the guide and the inner periphery side of the first sliding groove have interval and form annular channel, and one side of the guide is equipped with limiting slot, the inner side wall of the first sliding groove towards the limiting slot is equipped with limiting protrusion, the annular channel includes first guide channel section, second guide channel section, third guide channel section and fourth guide channel section in sequence along its annular direction, the first guide channel section and the fourth guide channel section are located at the outside of the limiting slot and the limiting protrusion, the second guide channel section and the third guide channel section are located between the limiting slot and the limiting protrusion, and one end of the first guide channel section and one end of the second guide channel section intersect and form first stop, the other end of the second guide channel section and one end of the third guide channel section intersect and form second stop, the other end of the third guide channel section and one end of the fourth guide channel section intersect and form third stop, the other end of the first guide channel section and the other end of the fourth guide channel section intersect; Rotating piece, the rotating piece is set in the accommodation space, and one end of the rotating piece is rotationally connected on the inner side wall of the shell, the other end of the rotating piece is equipped with positioning protrusion, and the positioning protrusion is abutted on the outer periphery side of the wheel core; Swing piece, one end of the swing piece is rotationally connected with the rotating piece, and the other end of the swing piece is inserted into the annular channel;By stretching the wire and driving the wheel core to rotate, the outer periphery side edge of the wheel core or the inner side wall of the positioning slot exerts force on the positioning protrusion, so that the rotating piece rotates and drives the swing piece to swing, so that the end of the swing piece abuts against the first stop, by releasing the wire, the wheel core is reversely rotated under the action of the coil spring to drive the rotating piece to rotate and drive the swing piece to swing, so that the swing piece is clamped on the second stop, and the positioning protrusion is inserted into the positioning slot to lock the stretched position of the wire, by stretching the wire again and driving the wheel core to rotate, the rotating piece is driven to rotate and the swing piece is driven to swing, so that the positioning protrusion exits the positioning slot and the swing piece abuts against the third stop. By releasing the wire again, the wheel core is reversely rotated under the action of the coil spring, to drive the rotating member to rotate and drive the swing member to move along the fourth guide channel segment, so that the wire is freely wound.

2. The wire expansion structure according to claim 1, wherein The side wall of the limiting protrusion is provided with an abutting position in the third guide channel segment at a position towards the second clamping position. When the wire is pulled again to drive the wheel core to rotate, the swing member abuts against the abutting position first and then moves from the abutting position along the third guide channel segment to abut against the third clamping position, so that the abutting position prevents the swing member from moving from the second clamping position into the second guide channel segment.

3. The wire expansion structure according to claim 1, wherein The guide member comprises a first guide part and a second guide part, one end of the first guide part is combined with one end of the second guide part, the other end of the first guide part and the other end of the second guide part extend in gradually diverging directions, and the limiting clamping groove is formed between the other end of the first guide part and the other end of the second guide part.

4. The wire extension structure according to claim 1, wherein The inner side wall of the shell is further provided with a second sliding groove, one end of the second sliding groove is communicated with the intersection of the first guide channel segment and the fourth guide channel segment, and the second sliding groove is used for sliding the swing member from the fourth guide channel segment when the wire is freely wound.

5. The wire extension structure according to claim 4, wherein The shell comprises an upper cover and a lower cover, the upper cover and the lower cover are connected and surround the accommodation space, and the first sliding groove and the second sliding groove are arranged on the inner side wall of the upper cover.

6. The wire extension structure according to claim 5, wherein The swing member comprises a swing body, a first connecting protruding shaft part and a second connecting protruding shaft part, the swing body is located between the rotating member and the upper cover, the first connecting protruding shaft part is arranged on one end of the swing body and towards one side of the swing member, the rotating member is provided with a insertion hole, the first connecting protruding shaft part is relatively rotatably inserted into the swing member, and the second connecting protruding shaft part is arranged on the other end of the swing body and towards one side of the upper cover, and the second connecting protruding shaft part is movably inserted into the annular channel or the second sliding groove.

7. The wire extension structure according to claim 1, wherein Further comprising an elastic member, the elastic member is arranged in the accommodation space and connected with the shell, and the elastic member abuts against the rotating member, the elastic member is used for applying an elastic force to the rotating member to drive the rotating member to rotate and make the positioning protrusion inserted into the positioning clamping groove; when the wire is pulled to drive the wheel core to rotate, the inner side wall of the positioning clamping groove can push the positioning protrusion out of the positioning clamping groove and make the rotating member rotate to press the elastic member, or the outer circumferential edge of the rotating member abuts against the positioning protrusion and makes the rotating member press the elastic member.

8. The wire extension structure according to claim 1, wherein The positioning protrusion is provided with a force auxiliary structure, the force auxiliary structure is in a slope structure or a circular arc structure, and the force auxiliary structure is used for being pushed by the side wall of the positioning clamping groove to assist the positioning protrusion to exit the positioning clamping groove.

9. The wire extension structure according to claim 1, wherein The wheel core comprises a wheel core disc body, a first wheel core annular protruding part and a second wheel core annular protruding part, the wheel core disc body is rotationally connected to the shell, the first wheel core annular protruding part is protruded on one side of the wheel core disc body, an installation space is arranged in the first wheel core annular protruding part, the coil spring is arranged in the installation space, the second wheel core annular protruding part is protruded on the other side of the wheel core disc body, and a plurality of positioning clamping grooves are arranged on the outer periphery of the second wheel core annular protruding part along the circumferential direction of the second wheel core annular protruding part.

10. The wire extension structure according to claim 9, wherein Further comprising a cover plate, the cover plate is connected with the first wheel core annular protruding part and covers the coil spring.

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