A telescopic cord module

Abstract

The utility model relates to a kind of telescopic wire module in wire rod winding technology field, including shell, wire rod and be used for winding the wire rod reel, the reel is rotatably installed in the shell by main shaft, the reel is made of the first bearing and the second bearing of relatively combined arrangement, accommodating space for accommodating the wire rod is arranged between the first bearing and the second bearing. The utility model is designed as the first bearing and the second bearing of relatively combined arrangement by reel, and accommodating space for accommodating wire rod is arranged between the two, effectively avoid the direct contact friction of wire rod and shell, so as to reduce the resistance of pulling wire rod, improve the use experience. At the same time, this structure also reduces the wear and tear of wire rod outer skin and the risk of internal wiring damage, prolongs the service life of wire rod, ensures charging effect.

Description

Technical Field

[0001] This utility model relates to the field of wire winding technology, specifically to a telescopic wire module. Background Technology

[0002] Charging devices (such as power banks or chargers) have cables for connecting to electronic devices to charge them. These devices may include a retractable cable module for winding the cable. When charging is needed, the cable can be pulled out from the retractable module to adjust its length, making it suitable for various applications. When charging is not needed, the retractable module can retract the cable, storing it for easy portability.

[0003] like Figure 1 As shown, the existing retractable cable module mainly includes a housing 1', a winding reel 3', and a coil spring. The two ends of the coil spring are connected to the winding reel 3' and the main shaft on the housing 1', respectively. The cable 2' is directly wound onto the open winding reel 3', and the housing 1' confines and houses the cable 2'. This existing structure has some shortcomings in practical use. First, the open design on one side of the winding reel 3' does not adequately protect the cable 2'. During the pulling process, the cable 2' will come into contact with and rub against the fixed housing 1', increasing the resistance to pulling the cable 2' and affecting the user experience. Furthermore, in long-term use, the continuous contact and friction between the cable 2' and the housing 1' can easily cause wear on the outer sheath of the cable 2' and even damage to the internal circuitry, affecting the cable 2's lifespan and charging efficiency. Therefore, to solve the above problems, this utility model provides a retractable cable module. Summary of the Invention

[0004] This invention provides a telescopic cable module to solve the problems mentioned in the background section.

[0005] The objective of this utility model is achieved through the following means: A telescopic cable module includes a housing, a cable, and a winding spool for winding the cable. The winding spool is rotatably mounted inside the housing via a spindle. The winding spool is composed of a first support member and a second support member arranged opposite to each other, and a receiving space for accommodating the cable is provided between the first support member and the second support member.

[0006] Furthermore, the inner wall of the housing is provided with contact protrusions for supporting the first carrier and / or the second carrier.

[0007] Furthermore, the contact protrusions are arranged around the rotation center of the winding reel within the housing.

[0008] Furthermore, a plurality of contact protrusions are provided, and the plurality of contact protrusions are sequentially arranged around the rotation center of the winding disc within the outer casing.

[0009] Furthermore, the contact protrusions are spherically shaped.

[0010] Furthermore, the first carrier has a central shaft portion extending to one side and connected to the second carrier in the middle, and one end of the wire is connected to the central shaft portion.

[0011] Furthermore, a fixed bone position is provided on one side of the central shaft portion, and a limiting cavity for cooperating with the wire is provided between the central shaft portion and the fixed bone position.

[0012] Furthermore, in the direction perpendicular to the first support member, the height of the fixed bone position is less than or equal to the height of the central shaft portion, and the end of the central shaft portion and the fixed bone position away from the first support member are respectively provided with a connecting portion for fitting and cooperating with the second support member.

[0013] Furthermore, the second carrier is provided with a snap fastener for engaging with the central shaft portion.

[0014] Furthermore, a coil spring is provided inside the central shaft portion, and the two ends of the coil spring are respectively connected to the central shaft portion and the main shaft.

[0015] Furthermore, one end of the outer casing is provided with a corner, the included angle between two adjacent sides of the corner is 70-110 degrees, and one side of the corner is provided with an outlet through which the wire can pass.

[0016] This invention effectively avoids direct contact and friction between the cable and the outer casing by designing the winding reel as a first and second support member arranged in a relatively combined manner, with a space between them for accommodating the cable. This reduces the resistance when pulling the cable and improves the user experience. At the same time, this structure also reduces the risk of wear on the cable sheath and damage to the internal circuitry, extending the cable's lifespan and ensuring charging performance. Attached Figure Description

[0017] Figure 1 This is an exploded view of a telescopic line module in the prior art; Figure 2 This is a structural schematic diagram of a telescopic line module according to the present invention; Figure 3 This is an exploded view of a telescopic wire module according to the present invention; Figure 4 This is a schematic diagram of the installation of the winding reel in this utility model; Figure 5 This is a schematic diagram of the disassembly of the winding reel in this utility model; Figure 6 This is a schematic diagram illustrating the use of the winding reel in this utility model; Figure 7 This is a schematic diagram of the winding reel in this utility model; Figure 8 This is an exploded view of the winding reel in this utility model; Figure 9 This is a schematic diagram of the interior of the outer shell in Embodiment 1; Figure 10 This is a schematic diagram of the interior of the outer shell in Embodiment 2; Figure 11 This is a schematic diagram of the interior of the outer shell in Embodiment 3; Figure 12 This is a schematic diagram of the interior of the outer casing in Embodiment 4; The reference numerals in the figure are as follows: 1-outer shell, 101-contact protrusion, 102-corner, 103-outlet, 2-wire, 3-winding reel, 3A-first support member, 31A-central shaft, 32A-connection, 33A-fixed rib, 3B-second support member, 31B-buckle, 3C-accommodating space, 4-main shaft, 5-circular conductive track, 6-conductive terminal, 7-coil spring. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Example

[0019] In this embodiment, refer to Figure 1 - Figure 9 The telescopic cable module specifically implemented therein includes a housing 1, a cable 2, and a winding spool 3 for winding the cable 2. The winding spool 3 is rotatably mounted inside the housing 1 via a main shaft 4. The winding spool 3 is composed of a first support member 3A and a second support member 3B arranged in a relatively combined manner. A receiving space 3C for receiving the cable 2 is provided between the first support member 3A and the second support member 3B.

[0020] like Figure 9As shown, the inner wall of the outer shell 1 is provided with contact protrusions 101 for supporting the second carrier 3B. By using contact protrusions 101 with a smaller contact area instead of surface contact between the outer shell 1 and the second carrier 3B, the resistance of the winding reel 3 during winding is reduced, making the winding of the wire 2 smoother. Furthermore, as a preferred embodiment, the inner wall of the other side of the outer shell 1 can be further augmented with contact protrusions 101 for supporting the first carrier 3A, symmetrically supporting the first carrier 3A and the second carrier 3B, further reducing rotational resistance and improving the stability and smoothness of the winding reel 3's rotation. In this embodiment, the contact protrusions 101 are integrally formed on the outer shell 1, and their cross-section is arc-shaped, which helps reduce frictional resistance and improve structural durability. Simultaneously, the arc-shaped design effectively avoids stress concentration, enhancing the overall strength of the outer shell 1.

[0021] The contact protrusion 101 is arranged around the rotation center of the winding disc 3 within the outer casing 1, forming a ring-shaped support track. This ensures that the first support member 3A and the second support member 3B are subjected to uniform force during rotation, resulting in smoother operation. This structure significantly improves the service life and handling of the telescopic cable module, making it suitable for applications requiring frequent plugging and unplugging.

[0022] The first carrier 3A has a central shaft portion 31A extending to one side and connected to the second carrier 3B at its center, thereby spacing the first carrier 3A and the second carrier 3B to form the receiving space 3C. One end of the wire 2 is connected to the central shaft portion 31A. In actual use, the wire 2 is wound along the central shaft portion 31A within the receiving space 3C. As the winding reel 3 rotates, the wire 2 is orderly wound within the receiving space 3C, avoiding tangling and misalignment.

[0023] In this embodiment, the central shaft portion 31A and the fixed rib position 33A are at the same height in the direction perpendicular to the first support member 3A. This equal-height design ensures that the winding reel 3 maintains axial balance during rotation, preventing eccentric wear or vibration caused by height differences, thereby improving winding stability and structural durability. Furthermore, both the central shaft portion 31A and the fixed rib position 33A have corresponding connecting portions 32A at their ends away from the first support member 3A for engaging with the second support member 3B. The second support member 3B has a slot for interference fit with the connecting portion 32A. This interference fit achieves a tight connection between the first support member 3A and the second support member 3B, effectively preventing axial movement or loosening during rotation. In this embodiment, the cross-section of the connecting portion 32A can be of any shape, such as square, circular, or polygonal, to adapt to different assembly requirements and enhance connection stability.

[0024] Alternatively, in the direction perpendicular to the first support member 3A, the height of the fixed bone position 33A is less than the height of the central shaft portion 31A. Although it is possible to connect with the second support member 3B through the connecting portion 32A, this height difference design may cause uneven axial force when the winding disc 3 rotates at high speed or is subjected to large external forces, thereby causing a slight eccentricity.

[0025] Furthermore, the second support member 3B is provided with a latch 31B for engaging with the central shaft portion 31A. The latch 31B and the central shaft portion 31A are interference-fitted to form a secure axial limit, preventing radial displacement or loosening during rotation. The inner wall of the latch 31B is provided with an elastic barb that engages with the annular groove on the outer surface of the central shaft portion 31A, providing clear positioning feedback during assembly and improving assembly efficiency and connection reliability.

[0026] A fixing bone 33A is provided on one side of the central shaft portion 31A at intervals. A limiting cavity for cooperating with the wire 2 is provided between the central shaft portion 31A and the fixing bone 33A. During assembly, the limiting cavity formed between the central shaft portion 31A and the fixing bone 33A tightly clamps the end of the wire 2, ensuring a firm connection and preventing it from easily loosening. This effectively prevents the wire 2 from falling off or making poor contact due to frequent pulling. Furthermore, to further increase the stability of the wire 2 connection, adhesive tape or glue can be attached to the end of the wire 2 to enhance the bonding strength between the limiting cavity and the wire 2, thereby maintaining a reliable connection during long-term use.

[0027] In this embodiment, the width of the limiting cavity is the same as or slightly larger than the thickness of the wire 2. This precise dimensional design ensures that the wire 2 will not be too tight to pull out within the limiting cavity, nor will it wobble or shift due to being too loose. During the repeated rotation of the winding reel 3 to wind and unwind the wire 2, the limiting cavity consistently provides a stable and reliable constraint on the wire 2, ensuring the smoothness and accuracy of its winding and unwinding. Furthermore, when the wire 2 is subjected to external forces in different directions, the limiting cavity can evenly distribute these forces, preventing the wire 2 from being damaged by excessive stress in certain areas, further improving the safety and stability of the wire 2 connection. In addition, this size-matching design also helps to improve the overall aesthetics and neatness of the winding reel 3, making the wire 2 more orderly and organized when stored.

[0028] The telescopic cable module also includes a conductive component, which comprises a circular conductive track 5 and a conductive terminal 6. The circular conductive track 5 is disposed on the end face of the first support member 3A away from the second support member 3B. The conductive terminal 6 is fixedly disposed on the inner side of the outer shell 1. After assembly, the conductive terminal 6 slides in contact with the circular conductive track 5 to achieve continuous conduction during rotation. One end of the cable 2 is connected to the limiting cavity and electrically connected to the circular conductive track 5, while the other end extends to the outside of the outer shell 1 as an output end. When the winding reel 3 rotates to retract or extend the cable 2, the conductive terminal 6 slides in contact along the circular conductive track 5 to ensure stable transmission of signals and power.

[0029] A coil spring 7 is installed inside the central shaft portion 31A. Both ends of the coil spring 7 are connected to the central shaft portion 31A and the main shaft 4, respectively. The coil spring 7 provides the elastic potential energy required for automatic retraction. When the wire 2 is pulled out, the coil spring 7 deforms under force to store energy; after being released, the coil spring 7 releases the elastic potential energy, driving the winding reel 3 to rotate in the opposite direction, thus achieving automatic retraction of the wire 2. Furthermore, the winding reel 3, composed of the first support member 3A and the second support member 3B, not only forms a stable cable winding space but also stably houses the coil spring 7 within its internal space, preventing deformation and failure due to external pressure or friction. This structural design effectively reduces the number of parts, simplifies the assembly process, and improves the overall compactness and reliability of the structure.

[0030] One end of the outer casing 1 is provided with a corner portion 102, and the two adjacent sides of the corner portion 102 are arranged perpendicularly to each other. One side of the corner portion 102 is provided with an outlet 103 through which the wire 2 can pass. This right-angle portion 102 design can ensure that after the wire 2 is retracted, it is always perpendicularly aligned with the edge of the outer casing 1, and the end of the wire 2 naturally fits the corner of the outer casing 1, avoiding tangling, misalignment or stacking and tilting, thus improving the neatness of storage and the cleanliness of appearance.

[0031] Furthermore, the included angle between two adjacent sides of the corner 102 can also be set to a range of 70-110 degrees. The corner 102 in this angle range can also ensure that the wire 2 is retracted and remains perpendicularly aligned with the edge of the outer shell 1, avoiding tangling, misalignment, or stacking and tilting, thereby improving the neatness of storage and the cleanliness of appearance.

[0032] This invention effectively avoids direct contact and friction between the cable 2 and the outer casing 1 by designing the winding reel 3 as a first support member 3A and a second support member 3B arranged in a relatively combined manner, with a receiving space 3C between them for accommodating the cable 2. This reduces the resistance when pulling the cable 2 and improves the user experience. At the same time, this structure also reduces the risk of wear on the outer sheath of the cable 2 and damage to the internal circuitry, extending the service life of the cable 2 and ensuring charging performance. Example

[0033] like Figure 10 As shown, the contact protrusions 101 can also be segmented into several sections. These contact protrusions 101 are sequentially arranged around the rotation center of the winding disc 3 within the outer casing 1, forming an intermittent annular support structure on the inner wall of the outer casing 1. This ensures stable support for the rotating component while further reducing the contact area and friction loss. The contact protrusions 101 are evenly distributed and tangent to the rotation trajectory of the winding disc 3, ensuring balanced force distribution. Example

[0034] like Figure 11 As shown, the contact protrusion 101 in this embodiment is spherically shaped, thereby further reducing the coefficient of friction and improving the smoothness of the rotation of the winding disc 3. The spherical cross-section structure forms an approximate point contact during movement, effectively reducing viscous resistance and avoiding deformation or wear caused by excessive local stress.

[0035] In this embodiment, the contact protrusion 101 is integrally injection molded onto the outer shell 1. Furthermore, the contact protrusion 101 is also a conventional technical means in the art to use a spherical ball structure to embed it into the outer shell. Example

[0036] In addition, such as Figure 12 As shown, to further improve the stability of the winding reel 3, annular contact protrusions 101 can be provided at the inner ring rib position of the outer shell 1 corresponding to the main shaft 4, and spherical contact protrusions 101 are arranged on the outer periphery. Through the double contact support structure, the winding reel 3 maintains axial positioning accuracy and obtains extremely low rotational resistance during rotation. The inner ring contact protrusion 101 adopts a semi-circular arc design, which cooperates with the main shaft 4 to form a stable support point; the diameter of the outer spherical contact protrusion 101 is controlled within the range of 0.6-3mm, which ensures structural strength and achieves a smooth effect similar to rolling friction. This composite support structure is particularly suitable for high-frequency rotation scenarios. Actual measurements show that it can reduce the starting torque of the winding reel 3 by more than 30%, while increasing the rotational life to more than 50,000 cycles, effectively solving the jamming phenomenon that is easily caused by traditional surface contact structures.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A telescopic cable module, comprising a housing (1), a cable (2), and a winding reel (3) for winding the cable (2), the winding reel (3) being rotatably mounted within the housing (1) via a main shaft (4), characterized in that: The winding spool (3) is composed of a first carrier (3A) and a second carrier (3B) arranged in a relative combination, and a receiving space (3C) for receiving the wire (2) is provided between the first carrier (3A) and the second carrier (3B).

2. The telescopic cable module according to claim 1, characterized in that: The inner wall of the outer casing (1) is provided with contact protrusions (101) for supporting the first carrier (3A) and / or the second carrier (3B).

3. The telescopic cable module according to claim 2, characterized in that: The contact protrusion (101) is disposed around the rotation center of the winding disc (3) inside the housing (1).

4. The telescopic cable module according to claim 2, characterized in that: The contact protrusions (101) are provided in a plurality of manner, and the plurality of contact protrusions (101) are arranged sequentially around the rotation center of the winding disc (3) inside the outer shell (1).

5. The telescopic cable module according to claim 4, characterized in that: The contact protrusion (101) is spherically shaped.

6. A telescopic cable module according to any one of claims 1-5, characterized in that: The first support member (3A) has a central shaft portion (31A) extending to one side and connected to the second support member (3B) in the middle, and one end of the wire (2) is connected to the central shaft portion (31A).

7. The telescopic cable module according to claim 6, characterized in that: A fixed bone position (33A) is provided on one side of the central shaft portion (31A), and a limiting cavity for cooperating with the wire (2) is provided between the central shaft portion (31A) and the fixed bone position (33A).

8. The telescopic line module according to claim 7, characterized in that, In the direction perpendicular to the first support member (3A), the height of the fixed bone position (33A) is less than or equal to the height of the central shaft portion (31A). The central shaft portion (31A) and the fixed bone position (33A) are each provided with a connecting portion (32A) for fitting and cooperating with the second support member (3B) at the ends away from the first support member (3A).

9. A telescopic cable module according to claim 8, characterized in that: The second support member (3B) is provided with a snap (31B) for engaging with the central shaft portion (31A).

10. A telescopic line module according to any one of claims 7-9, characterized in that: A coil spring (7) is provided inside the central shaft part (31A), and the two ends of the coil spring (7) are respectively connected to the central shaft part (31A) and the main shaft (4).

11. A telescopic cable module according to any one of claims 1-5, characterized in that: One end of the outer casing (1) is provided with a corner (102), the included angle between two adjacent sides of the corner (301) is 70-110 degrees, and one side of the corner (102) is provided with an outlet (103) through which the wire (2) can pass.

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