An automatic retractable charging cord

Abstract

This utility model provides an automatic retractable charging cable, including a housing and a winding turntable. The housing includes an upper cover and a lower cover. The lower cover has a central column, and a control ornament and a control wheel are provided on its upper surface. The central column passes through the winding turntable. A spring is provided around the central column inside the winding turntable, and a charging cable is wound around its outer side. One end of the charging cable is fixed to the side wall of the winding turntable, and the other end extends out of the housing. A connecting block is provided around the central column at the bottom of the winding turntable, and a groove is provided on the edge of the connecting block. One end of the control ornament is provided with a locking block that matches the groove. The lower surface of the control ornament is provided with a pushing surface and a limiting groove that fits into the side wall of the control wheel. The control wheel is provided with a corner that fits into the limiting groove. The control ornament can swing under the drive of the connecting block, so that the side wall of the control wheel fits into the four pushing surfaces respectively, and drives the control wheel to rotate through the pushing surfaces, so that the corner of the control wheel is engaged in the limiting groove. The overall structure is compact and stable, and easy to store.

Description

Technical Field

[0001] This utility model relates to the field of charging device technology, specifically an automatic retractable charging cable. Background Technology

[0002] In everyday electronic device use, chargers are crucial accessories for powering and replenishing devices. Their core function is to convert AC power from the mains into low-voltage DC power required by the electronic device. These chargers typically consist of an adapter and a charging cable. One end of the charging cable connects to the adapter, while the other end has a charging port compatible with the electronic device. They are widely used in portable electronic devices such as mobile phones, cameras, and tablets.

[0003] In practical use, since fixed power sockets are mostly installed on wall surfaces, while electronic devices such as mobile phones and cameras need to be placed on horizontal support surfaces such as desktops or stands to ensure ease of use and device safety, the charging cables of existing chargers are generally designed to be longer to accommodate the space distance between the socket and the device.

[0004] With the widespread use of electronic devices, charging has become a rigid requirement in daily life and work. The messy nature of long charging cables during use and storage, such as tangling and space-consuming strands, has become a common concern for both the industry and users. To address this issue, chargers with retractable cable modules have emerged, using a winding reel structure to extend and retract the charging cable. However, existing retractable charging cable designs have significant flaws: to prevent the cable from swinging up and down relative to the winding reel and ensure stability, frame structures are typically placed on the top and bottom of the reel. While these frame structures provide some restraint, they significantly increase the overall size of the retractable cable module, reducing the overall portability of the charging cable and charger. This makes it difficult to meet users' demands for miniaturized and lightweight charging devices, becoming a major technical pain point in the current research and application of retractable charging products. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an automatic retractable charging cable. By setting a miniature automatic control module, the charging cable can be stably and conveniently stored. Furthermore, the entire device can be integrated into the charger, saving space and ensuring stable performance.

[0006] To achieve its technical objectives, this utility model adopts the following technical solution:

[0007] An automatic retractable charging cable includes a housing and a winding disc installed inside the housing. The housing includes a detachable upper cover and a lower cover. A central column is disposed in the center of the lower cover, and a control ornament and a control wheel are rotatably mounted on its upper surface. The central column passes through the winding disc. A spring is wound around the central column inside the winding disc, with both ends of the spring fixed to the top of the central column and the side wall of the winding disc. A charging cable is wound around the outside of the winding disc, with one end of the charging cable fixedly connected to the side wall of the winding disc and the other end extending out of the housing. A connecting block is integrally formed around the central column at the bottom of the winding disc, and a groove is provided along the edge of the connecting block. One end of the control ornament is provided with a locking block adapted to the groove, and the other side is provided with a spring piece. The lower surface of the control ornament forms a pushing surface and a limiting groove that fits into the side wall of the control wheel. The pushing surface includes a first pushing surface, a second pushing surface, a third pushing surface, and a fourth pushing surface. The limiting groove is formed between the first pushing surface and the second pushing surface. The control wheel is provided with corners that fit into the limiting groove. The control ornament can swing under the drive of the connecting block, so that the side wall of the control wheel fits into the four pushing surfaces respectively, and drives the control wheel to rotate through the pushing surfaces, so that the corners of the control wheel are engaged in the limiting groove.

[0008] Preferably, the top of the center post has a center post groove adapted to the mainspring, one end of the mainspring is fixedly inserted into the center post groove, and the other end is fixedly connected to the side wall of the winding turntable.

[0009] Preferably, the side wall of the winding turntable is provided with a slot, one end of the charging cable is fixed in the slot, and the other end extends out of the housing through the cable outlet on the side wall of the housing.

[0010] Preferably, it also includes a charging component, which includes a wiring PCB board and a connector PCBA. The wiring PCB board is installed inside the winding turntable, and the connector PCBA is installed between the lower cover and the wiring PCB board, and the wiring PCB board and the connector PCBA are electrically connected.

[0011] More preferably, one side of the wiring PCB is fixedly mounted on one side of the winding turntable, the wiring PCB is electrically connected to the charging cable, and a through hole adapted to the connecting block is provided in the center of the wiring PCB. The connecting block passes through the through hole and abuts against the control component.

[0012] More preferably, the connector PCBA is located on one side of the control wheel and the control swing component, the connector PCBA has a through hole in the center for the central column to pass through, and the connector PCBA has a pad for external power supply lines, the pad protruding from the lower surface of the lower cover.

[0013] Preferably, the upper surface of the lower cover is provided with an arc-shaped groove, and a fixing block is provided at both ends of the arc-shaped groove. The fixing block is provided with a limiting slot that matches the spring piece, and the limiting slot divides the fixing block into two parts.

[0014] More preferably, the two ends of the spring pass through the limiting slots at both ends of the arc-shaped groove, and the two ends of the spring are provided with limiting pieces. The spring undergoes elastic deformation in the arc-shaped groove under the push of the control swing element.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention precisely solves the pain points of messy charging cable storage and excessively large retractable devices, achieving stable and convenient charging cable storage and retrieval: simply pull the charging cable outward to smoothly unfold it, and release it after pulling out to quickly fix it in place, meeting the needs of different usage scenarios; at the same time, the control ornament and control wheel are small in size and work stably together, eliminating the need for additional redundant structures, effectively controlling the overall size from a design perspective, ensuring orderly charging cable storage while achieving device miniaturization, fully meeting the needs of lightweight use.

[0017] This utility model further enhances ease of use and functional stability by controlling the ornament in conjunction with the control wheel: the automated opening and closing and fixing process formed by the two can effectively avoid situations where the opening and closing is too fast or jammed, ensuring that every operation is accurate and reliable; while ensuring functional stability, it greatly improves the portability of the device and the user experience, accurately matching the user's core needs for efficient and lightweight charging devices. Attached Figure Description

[0018] Figure 1 This is an exploded view of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the spring and charging cable of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the control swing element and control wheel of this utility model;

[0021] Figure 4 This is a schematic diagram of the assembly structure of the connecting block, control swing element and control wheel of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the arc-shaped groove and the fixing block of this utility model;

[0023] Figure 6 This is a perspective view of the assembly structure of the winding turntable and the lower cover of this utility model;

[0024] Figure 7This is a three-dimensional view of the control ornament and control wheel structure of this utility model;

[0025] Figure 8 This is a three-dimensional structural view of the bottom surface of the connector PCBA of this utility model;

[0026] Figure 9 This is a schematic diagram of the first cooperative state of the control ornament, control wheel, and connecting block of this utility model;

[0027] Figure 10 This is a schematic diagram of the second cooperative state of the control ornament, control wheel, and connecting block of this utility model;

[0028] Figure 11 This is a schematic diagram of the third engagement state of the control ornament, control wheel, and connecting block of this utility model;

[0029] Figure 12 This is a schematic diagram of the fourth engagement state of the control ornament, control wheel, and connecting block of this utility model.

[0030] Figure label:

[0031] 1. Top cover; 2. Bottom cover; 3. Winding turntable; 4. Control component; 5. Control wheel; 6. Wiring PCB board; 7. Spring; 8. Connector PCBA; 9. Charging cable; 10. Spring; 11. Center column; 12. Center column groove; 13. Arc groove; 14. Connecting block; 15. Slot; 16. First pushing surface; 17. Second pushing surface; 18. Third pushing surface; 19. Fourth pushing surface; 20. Limiting groove; 21. Corner; 22. Solder pad; 23. Limiting seam; 24. Limiting piece; 25. Fixing block; 26. Slot. Detailed Implementation

[0032] In the description of this utility model, it should be noted that the terms "upper / lower," "front / rear," "inner / outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are only used to more clearly correspond to different connection positions in the description, and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the components of a compatible model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, unless otherwise specified, all components used in this application are commercially available components, and the connection between different components can be achieved through conventional technical means.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] An automatic retractable charging cable, such as Figures 1-7 As shown, the device includes a housing and a winding turntable 3 installed inside the housing. The housing includes a detachable upper cover 1 and a lower cover 2. The lower cover 2 has a groove on its side wall, and the upper cover 1 has downwardly oriented claws on its side wall. The claws engage with the grooves to fix the upper cover 1 and the lower cover 2 together. A central post 11 is located in the center of the lower cover 2, and a control swing element 4 and a control wheel 5 are rotatably mounted on its upper surface. The central post 11 passes through the winding turntable 3, and a spring 10 is coiled around the central post 11 inside the winding turntable 3, with both ends of the spring 10 respectively fixed. The top of the central column 11 and the side wall of the winding turntable 3 are fixed. A charging cable 9 is wound around the outside of the winding turntable 3. One end of the charging cable 9 is fixedly connected to the side wall of the winding turntable 3, and the other end extends out of the outer shell. A connecting block 14 is integrally formed around the central column 11 at the bottom of the winding turntable 3. A groove is provided on the edge of the connecting block 14. A locking block 26 that matches the groove is provided at one end of the control ornament 4, and a spring piece 7 is provided on the other side. The lower surface of the control ornament 4 forms a pushing surface and a limiting groove 20 that fits the side wall of the control wheel 5.

[0036] Specifically, such as Figure 7 As shown, the pushing surface specifically includes a first pushing surface 16, a second pushing surface 17, a third pushing surface 18, and a fourth pushing surface 19. A limiting groove 20 is formed between the first pushing surface 16 and the second pushing surface 17. The control wheel 5 has a convex design and is provided with several corners 21, which are adapted to the limiting groove 20. The control swing member 4 can swing under the drive of the connecting block 14, so that the side wall of the control wheel 5 is respectively in contact with the four pushing surfaces, and the pushing surfaces drive the control wheel 5 to rotate, so that one corner 21 of the control wheel 5 is engaged in the limiting groove 20, thereby fixing the extension length of the charging cable 9.

[0037] It should be noted that the conditional contact between the pushing surface and the side wall of the control wheel 5 means that when the control pendulum 5 swings under the push of the connecting block 14, the side wall of the control wheel 5 will contact the four pushing surfaces respectively. Under the action of the pushing surfaces, the control wheel 5 can rotate on a fixed axis.

[0038] Preferably, the top of the central column 11 is provided with a central column groove 12 that is compatible with the mainspring 10. One end of the mainspring 10 is fixedly inserted into the central column groove 12, and the other end is fixedly connected to the side wall of the winding turntable 3. The side wall of the winding turntable 3 is provided with a slot 15. One end of the charging cable 9 is fixed in the slot 15, and the other end extends out of the outer shell through the cable outlet on the side wall of the outer shell. At the same time, a charging connector is fixedly provided at the end of the charging cable 9 that extends out of the outer shell. When the charging cable 9 is pulled outward, the winding turntable 3 rotates around the central column 11, thereby causing the mainspring 10 to undergo elastic deformation, providing a power basis for the subsequent recycling of the charging cable 9.

[0039] Preferably, the device also includes a charging assembly, which includes a wiring PCB board 6 and a connector PCBA 8. The wiring PCB board 6 is installed inside the winding turntable 3, and the connector PCBA 8 is installed between the lower cover 2 and the wiring PCB board 6, and the wiring PCB board 6 and the connector PCBA 8 are electrically connected.

[0040] As a better option, such as Figure 1 and Figure 6 As shown, one side of the wiring PCB board 6 is fixedly mounted on one side of the winding turntable 3. The wiring PCB board 6 and the charging cable 9 are electrically connected. The center of the wiring PCB board 6 is provided with a through hole that matches the connecting block 14. The connecting block 14 passes through the through hole and abuts against the control ornament 4.

[0041] As a better option, such as Figure 1 and Figure 8 As shown, the connector PCBA 8 is located on one side of the control wheel 5 and the control swing piece 4. The connector PCBA 8 has a through hole in the center for the central column 11 to pass through, and the connector PCBA 8 has a solder pad 22 for external power supply lines. The solder pad 22 protrudes from the lower surface of the lower cover 2; thus providing an external interface for connecting to power supply, which is convenient for assembly with other charging equipment.

[0042] Preferably, the upper surface of the lower cover 2 is provided with an arc-shaped groove 13, and both ends of the arc-shaped groove 13 are provided with fixing blocks 25. The fixing blocks 25 are provided with limiting slots 23 that are compatible with the spring sheet 7, and the limiting slots 23 divide the fixing blocks 25 into two parts.

[0043] As a better alternative, the two ends of the spring piece 7 pass through the limiting slots 23 at both ends of the arc groove 13, and the two ends of the spring piece 7 are integrally formed with limiting plates 24. Under the push of the control ornament 4, the spring piece 7 undergoes elastic deformation in the arc groove 13. The middle section of the spring piece 7 will move outward, and its two ends will approach each other. However, under the restriction of the limiting plates 24, the spring piece 7 always deforms within the preset limit.

[0044] The working principle of this utility model is as follows:

[0045] like Figure 7 and Figure 9 As shown, when the charging cable 9 is pulled outward, the winding turntable 3 rotates counterclockwise, the spring 10 is stressed and the elasticity increases, the connecting block 14 at the bottom of the winding turntable 3 pushes the control pendant 4 to swing clockwise (swing to the left around the fixing hole), the spring piece 7 is deformed by the force, and the third pushing surface 18 of the control pendant 4 pushes the control wheel 5 to rotate clockwise around the center. During this process, the side wall of the connecting block 14 and the locking block 26 of the control pendant 4 abut against each other and prevent the control pendant 4 from resetting.

[0046] like Figure 10 As shown, after the charging cable 9 is pulled out to a certain distance, the charging cable 9 is released, the spring 10 springs back and pulls the winding turntable 3 to rotate clockwise, the spring 7 springs back and pushes the control pendulum 4 to swing counterclockwise (swing to the right around the fixing hole), the first pushing surface 16 of the control pendulum 4 pushes the control wheel 5 to rotate clockwise until the edge 21 of the control wheel 5 is stuck in the limiting groove 20. At the same time, the locking block 26 of the control pendulum 4 is locked in the side wall groove of the connecting block 14. At this time, under the interaction of the spring 7, the control pendulum 4, the control wheel 5 and the connecting block 14, the winding turntable 3 is fixed and the charging cable 9 is fixed for use.

[0047] like Figure 11 As shown, when the charging cable 9 needs to be stored, pull the charging cable 9 outward again, the winding turntable 3 rotates counterclockwise, the spring 10 is stressed and the elasticity increases, the connecting block 14 of the winding turntable 3 pushes the control ornament 4 to rotate clockwise, the spring 7 is stressed and deformed, and the fourth pushing surface 19 of the control ornament 4 pushes the control wheel 5 to rotate clockwise around the center.

[0048] like Figure 12 Release the charging cable 9, the spring 10 springs back and releases, pull the winding turntable 3 to rotate clockwise, the spring 7 springs back, the connecting block 4 of the winding turntable 3 pushes the control ornament 4 to swing counterclockwise (swing to the right around the fixed hole), the second pushing surface 17 of the control ornament 4 pushes the control wheel 5 to rotate clockwise, and the charging cable 9 is retracted.

[0049] Understandably, when the locking block 26 of the control ornament 4 is engaged in the groove of the connecting block 14, the side wall of the groove will move the locking block 26 to make the control ornament 4 swing when the winding turntable 3 needs to rotate again. The working mode of the entire device is as follows: pull out the charging cable 9 - the charging cable 9 retracts slightly and is fixed for use - pull the charging cable 9 again - release the charging cable 9, and the charging cable 9 retracts into the outer shell for storage. At the same time, in actual production, the entire device can be installed in the charger to save space and meet diverse usage needs.

[0050] Although the embodiments of this utility model have been described in the specification, these embodiments are merely illustrative and should not be construed as limiting the scope of protection of this utility model. Various omissions, substitutions, and modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automatic retractable charging cable, characterized in that, The device includes an outer casing and a winding turntable installed within the casing. The outer casing includes a detachable upper cover and a lower cover. A central column is located in the center of the lower cover, and a control ornament and a control wheel are rotatably mounted on its upper surface. The central column passes through the winding turntable. A spring is wound around the central column inside the winding turntable, with both ends of the spring fixed to the top of the central column and the side wall of the winding turntable. A charging cable is wound around the outside of the winding turntable, with one end of the charging cable fixedly connected to the side wall of the winding turntable and the other end extending out of the outer casing. A connecting block is integrally formed around the central column at the bottom of the winding turntable, and a groove is provided along the edge of the connecting block. One end of the control ornament is... The control swing member has a locking block adapted to the groove, a spring piece on the other side, and a pushing surface and a limiting groove formed on the lower surface of the control swing member that fits into the side wall of the control wheel. The pushing surface includes a first pushing surface, a second pushing surface, a third pushing surface, and a fourth pushing surface. The limiting groove is formed between the first pushing surface and the second pushing surface. The control wheel has corners that fit into the limiting groove. The control swing member can swing under the drive of the connecting block, so that the side wall of the control wheel fits into the four pushing surfaces respectively, and drives the control wheel to rotate through the pushing surfaces, so that the corners of the control wheel are engaged in the limiting groove.

2. The automatic retractable charging cable as described in claim 1, characterized in that, The top of the central column has a central column groove that is adapted to the mainspring. One end of the mainspring is fixedly inserted into the central column groove, and the other end is fixedly connected to the side wall of the winding turntable.

3. The automatic retractable charging cable as described in claim 1, characterized in that, The winding turntable has a slot on its side wall. One end of the charging cable is fixed in the slot, and the other end extends out of the housing through the cable outlet on the side wall of the housing.

4. The automatic retractable charging cable as described in claim 1, characterized in that, It also includes a charging component, which includes a wiring PCB board and a connector PCBA. The wiring PCB board is installed inside the winding turntable, and the connector PCBA is installed between the lower cover and the wiring PCB board, and the wiring PCB board and the connector PCBA are electrically connected.

5. An automatic retractable charging cable as described in claim 4, characterized in that, One side of the wiring PCB is fixedly mounted on one side of the winding turntable. The wiring PCB is electrically connected to the charging cable. A through hole adapted to the connecting block is provided in the center of the wiring PCB. The connecting block passes through the through hole and abuts against the control component.

6. The automatic retractable charging cable as described in claim 5, characterized in that, The connector PCBA is located on one side of the control wheel and the control swing component. The connector PCBA has a through hole in the center for the central column to pass through, and the connector PCBA has a pad for external power supply lines. The pad protrudes from the lower surface of the lower cover.

7. The automatic retractable charging cable as described in claim 1, characterized in that, The upper surface of the lower cover is provided with an arc-shaped groove, and a fixing block is provided at both ends of the arc-shaped groove. The fixing block is provided with a limiting slot that matches the spring piece, and the limiting slot divides the fixing block into two parts.

8. The automatic retractable charging cable as described in claim 7, characterized in that, The two ends of the spring piece pass through the limiting slots at both ends of the arc-shaped groove, and the two ends of the spring piece are provided with limiting pieces. The spring piece undergoes elastic deformation in the arc-shaped groove under the push of the control swing element.

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