A kind of automatic winding mechanism of charging wire material and its storage mechanism

Abstract

A kind of automatic winding storage mechanism of charging wire material and its storage mechanism, relate to charging wire material automatic storage structure technical field, solve the technical deficiencies of existing automatic winding device for storage charging wire material, through small current, short service life, poor electrical connection stability, the automatic winding storage mechanism of charging wire material, including fixed shaft and winding wheel;Fixed shaft outer wall is equipped with two groups or more elastic conductive brush;Winding wheel is assembled by wheel main body and encapsulation block, two groups or more conductive ring limit slot are arranged in wheel main body, the slot of conductive ring limit slot is located on the connecting surface of wheel main body and encapsulation block, conductive ring is arranged in conductive ring limit slot, each conductive ring is coaxially fixed in wheel main body, and is elastically electrically connected with the elastic conductive brush on the outer wall of fixed shaft.The conductive brush and conductive ring are installed on the fixed shaft and winding wheel with a special structure, which is convenient for production and assembly, and also convenient for welding with the wire, low in production cost, stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automatic charging cable storage structure technology, and in particular to the improvement of the conductive shaft core structure of the charging cable storage mechanism for charging mobile phones and other electronic products. Background Technology

[0002] To address the issues of messy storage and inconvenience in carrying charging cables, existing solutions fall into two categories: one is a manual winding device, which is cumbersome to operate and inefficient; the other is an automatic winding and storage device, which uses a coil spring winding mechanism and a ratchet self-locking mechanism inside the housing to achieve automatic winding and self-locking of the cable after it is pulled out.

[0003] To ensure uninterrupted electrical signal transmission during the rotation of the winding reel, automatic winding devices typically incorporate a conductive brush and conductive ring structure between the reel's side and the housing. The conductive brush elastically abuts against the conductive ring surface, forming a sliding electrical connection. However, this design has significant drawbacks in practical use: when the user quickly pulls out the wire, the winding reel vibrates violently, and in inferior products, the conductive brush and conductive ring are prone to detaching, leading to circuit interruption and affecting charging or data transmission stability. Furthermore, existing designs often use low-elasticity conductive brushes to avoid friction between the brush and the ring hindering the coil spring's winding, resulting in a small contact area. This not only limits the current flow but also shortens the lifespan of the winding device. Utility Model Content

[0004] In summary, the purpose of this utility model is to address the shortcomings of existing automatic winding devices for storing charging cables, such as poor electrical connection stability, low current throughput, and short service life. The present invention proposes a conductive shaft core and its storage mechanism for an automatic winding and storage mechanism for charging cables.

[0005] To address the technical shortcomings of this utility model, the following technical solution is adopted:

[0006] A conductive shaft core for an automatic winding and storage mechanism for charging cables includes a fixed shaft and a winding wheel movably sleeved on the fixed shaft; characterized in that: the outer wall of the fixed shaft is provided with two or more sets of elastic conductive brushes; the winding wheel is assembled from a wheel body and an encapsulation block, and the wheel body is provided with two or more sets of conductive ring limiting grooves, the groove openings of the conductive ring limiting grooves are located on the connecting surface of the wheel body that is in contact with the encapsulation block, and conductive rings are provided in the conductive ring limiting grooves, each conductive ring being coaxially fixed in the wheel body and elastically electrically connected to the elastic conductive brushes on the outer wall of the fixed shaft.

[0007] The technical features that further define this utility model include:

[0008] The elastic conductive brush includes an arc-shaped elastic brush portion and an L-shaped lead portion; the lead portion is longitudinally embedded in the fixed shaft, with one end connected to the elastic brush portion and the other end led out from the end of the fixed shaft; the elastic brush portion elastically abuts against the inner surface of the conductive ring.

[0009] The elastic brush section and the lead section are an integral structure, and an annular positioning groove is provided on the fixed shaft to cooperate with and position the elastic brush section; the depth of the annular positioning groove is less than the height of the outer surface of the lead section when it is embedded in the fixed shaft; the positions of each lead section embedded in the fixed shaft are staggered.

[0010] The winding reel has a connecting groove on its connecting surface, and the encapsulation block has a connecting block corresponding to the connecting groove. A locking element is also inserted into the connecting block on the winding reel.

[0011] The wheel body has a terminal hole on the side opposite to the connecting surface; the conductive ring has a welding terminal on its outer wall, and the welding terminal protrudes from the side of the wheel body through the terminal hole on the wheel body.

[0012] This utility model discloses an automatic winding and storage mechanism for charging cables, comprising an upper shell, a lower shell, a charging cable, and a coiling spring winding mechanism. The mechanism is characterized by further including a conductive shaft; the two ends of the fixed shaft of the conductive shaft are respectively fixedly connected to the upper shell and the lower shell; the winding wheel is placed in the shell space formed by the upper shell and the lower shell; the coating layer at the tail end of the charging cable is fixedly connected to the encapsulation block; each wire at the tail end of the charging cable is welded to a conductive ring; the coiling spring winding mechanism is installed on the side of the winding wheel; and a locking clip is provided on the inner side of the upper shell to cooperate with and lock the coiling spring winding mechanism.

[0013] Further defined technical features include:

[0014] The coil spring take-up mechanism includes a wheel plate, the lower surface of which is fixedly connected to the upper end of the winding wheel. The upper surface of the wheel plate has a coil spring receiving groove and a locking groove surrounding the coil spring receiving groove. A coil spring is provided inside the coil spring receiving groove, one end of which is connected to a fixed shaft, and the other end is connected to the groove wall. The locking groove includes an annular groove body, within which one or more guide locking blocks and one or more guide blocks are provided. The guide locking blocks and guide blocks are alternately distributed in the annular groove body, dividing the annular groove body into an inner ring and an outer ring. The front end of the guide locking block has a locking mechanism that... The pin engages with a V-shaped groove to prevent the winding wheel from rotating clockwise under the force of the coil spring; the guide block also includes an outer side that guides the locking pin from the inner ring to the outer ring when the winding wheel rotates counterclockwise; the guide block includes a locking pin that, when the winding wheel rotates counterclockwise, guides the locking pin that has disengaged from the V-shaped groove to the tail end of the inner ring; the outer wall of the inner ring is provided with an arc-shaped inner protrusion that, when the winding wheel rotates counterclockwise, guides the locking pin in the inner ring to the outer side of the guide block; the inner wall of the outer ring is provided with an arc-shaped outer protrusion that, when the winding wheel rotates counterclockwise, guides the locking pin in the outer ring to the position where the V-shaped groove can engage when rotating clockwise.

[0015] The locking mechanism includes a sliding seat and a locking pin vertically fixed to the sliding seat; the inner side of the upper shell is provided with a T-shaped groove, the sliding seat is located in the T-shaped groove, and the locking pin extends from the T-shaped groove to the coil spring winding mechanism.

[0016] The end of the charging cable and the encapsulation block are fixed by injection molding.

[0017] The upper shell and the lower shell are also provided with a locking fastener via a fixed shaft.

[0018] The beneficial effects of this utility model are as follows: The conductive shaft of the automatic winding and storage mechanism for charging cables of this utility model has an elastic conductive brush set on the outer wall of the fixed shaft, and a conductive ring embedded in the winding wheel. Compared with the existing conductive brush and conductive ring combination on the side of the winding wheel, this utility model is more stable and reliable. Most importantly, the conductive brush and conductive ring of this utility model adopt a unique structure and are installed on the fixed shaft and winding wheel, which facilitates production and assembly, and also facilitates welding with the wire. The production cost is low, and the system is stable and reliable. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the automatic winding and storage mechanism for charging cables according to this utility model.

[0020] Figure 2 This is an exploded structural diagram of the automatic winding and storage mechanism for charging cables according to this utility model.

[0021] Figure 3This is an exploded view of the automatic winding and storage mechanism for charging cables of this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the housing of the automatic winding and storage mechanism for charging cables of this utility model.

[0023] Figures 5 to 7 This is a schematic diagram showing three different angle structures of the conductive shaft core of the automatic winding and storage mechanism for charging cables of this utility model.

[0024] Figure 8 This is an exploded view of the winding reel of this utility model.

[0025] Figure 9 This is a schematic diagram of the conductive ring and fixed shaft in the engagement state of this utility model.

[0026] Figure 10 This is a schematic diagram of the fixed shaft structure of this utility model.

[0027] Figure 11 This is a schematic diagram of the fixed shaft structure of this utility model in an exploded state.

[0028] Figure 12 This is a schematic diagram of the conductive brush structure of this utility model. Detailed Implementation

[0029] The structure of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0030] Reference Figures 1 to 4 As shown, the present invention discloses an automatic winding and storage mechanism for charging cables, which includes an upper shell 11, a lower shell 12, a charging cable 2, and a coiling spring winding mechanism 3, as well as a conductive shaft 4. The two ends of the fixed shaft of the conductive shaft 4 are respectively fixedly connected to the upper shell 11 and the lower shell 12, and the winding wheel of the conductive shaft 4 is placed in the housing space formed by the upper shell 11 and the lower shell 12. The coiling spring winding mechanism 3 is installed on the side of the winding wheel of the conductive shaft 4. The inner side of the upper shell 11 is provided with a locking piece 5 that cooperates with the coiling spring winding mechanism 3 to lock. The charging cable 2 has a connector 21 at its end for connecting to a mobile phone or other electronic products. The connector 21 is located outside the housing formed by the upper shell 11 and the lower shell 12. Under external force, the charging cable 2 can be pulled out of the housing. After the external force is released, the winding wheel of the conductive shaft core 4 reverses under the action of the coil spring winding mechanism 3, retracting the charging cable 2 into the housing. The locking clip 5 has a locking pin, which keeps the charging cable 2 from retracting into the housing after the external force is released, and only after pulling the charging cable 2 to an appropriate length again can the charging cable 2 be completely retracted into the housing.

[0031] Reference Figures 4 to 12 As shown, the conductive shaft core 4 of this utility model not only provides support for the winding of the charging cable 2, but also realizes the circuit connection when the winding wheel is rotating; the conductive shaft core 4 disclosed in this utility model includes a fixed shaft 41 and a winding wheel 42 movably sleeved on the fixed shaft 41; the outer wall of the fixed shaft 41 is provided with two or more sets of elastic conductive brushes 44, and five sets of elastic conductive brushes 44 are used as an example in the figure; in the specific implementation process, if the function of the charging cable 2 is only for charging and data signal transmission is not considered, two sets of elastic conductive brushes 44 can also be used.

[0032] The winding wheel 42 is assembled from a wheel body 421 and an encapsulation block 422. The wheel body 421 has two or more sets of conductive ring limiting grooves 4211. The opening of the conductive ring limiting groove 4211 is located on the connecting surface of the wheel body 421 that is in contact with the encapsulation block 422. Conductive rings 43 are provided in the conductive ring limiting grooves 4211. Each conductive ring 43 is coaxially fixed in the wheel body 421 and is elastically electrically connected to the elastic conductive brush 44 on the outer wall of the fixed shaft 41. This utility model adopts a modular winding wheel 42, which not only facilitates the quick assembly and fixation of the conductive rings 43, but also facilitates a firm connection between the charging cable 2 and the winding wheel 42. That is, the coating layer at the tail end of the charging cable 2 can be first fixedly connected to the encapsulation block 422 by a pin, or the tail end of the charging cable 2 and the encapsulation block 422 can be injection molded to prevent it from falling off and being damaged due to excessive pulling force on the charging cable 2. During assembly, each conductive ring 43 is inserted into the slot of the conductive ring limiting groove 4211, and then the slot is closed by the encapsulation block 422. After the encapsulation block 422 is fixedly installed with the wheel body 421, the installation between the charging cable 2 and the winding wheel 42 is completed simultaneously. Finally, each wire at the tail end of the charging cable is welded to each conductive ring one by one.

[0033] like Figure 12 As shown, each of the aforementioned elastic conductive brushes 44 includes an arc-shaped elastic brush portion 441 and an L-shaped lead portion 442. The lead portion 442 is longitudinally embedded in the fixed shaft 41, with one end connected to the elastic brush portion 441, preferably connected to the middle side of the elastic brush portion 441, and the other end leading out from the end of the fixed shaft 41. The elastic brush portion 441 elastically abuts against the inner surface of the conductive ring 43. During the rotation of the conductive ring 43 relative to the fixed shaft 41 with the winding wheel 42, the elastic brush portion 441 always has two contact surfaces elastically abutting against the inner surface of the conductive ring 43. The electrical connection between the two is stable and reliable. Compared with the electrical connection structure of the conventional winding wheel 42 with the conductive brush and conductive ring on the side, the vibration amplitude is small and the dynamic friction speed is low.

[0034] The elastic brush portion 441 and the lead portion 442 are an integral structure and can be formed by stamping copper plates. To better limit the installation of the elastic brush portion 441, an annular positioning groove 411 is provided on the fixed shaft 41 to cooperate with and position the elastic brush portion. To avoid short circuits between the fixed lead portion 442 embedded longitudinally on the fixed shaft 41 and the elastic brush portions 441 of other elastic conductive brushes 44 arranged laterally on the fixed shaft 41, the depth of the annular positioning groove 411 is less than the height of the outer surface of the lead portion 442 when it is embedded in the fixed shaft; the positions of each lead portion 442 embedded in the fixed shaft 41 are staggered.

[0035] To achieve a quick and reliable assembly connection between the wheel body 421 and the encapsulation block 422 of the winding reel, such as Figure 8 As shown, the connecting surface of the wheel body 421 of the winding wheel is provided with a connecting groove 4212, and the encapsulation block 422 is provided with a connecting block 4221 corresponding to the connecting groove 4212. A locking element is also inserted in the connecting block on the wheel body 42. The locking element can be a screw or a rivet.

[0036] To facilitate the welding of each wire at the end of the charging cable to each conductive ring, a terminal hole 4213 is provided on the side of the wheel body 421 opposite to the connecting surface; a welding terminal 431 is provided on the outer wall of the conductive ring 43, and the welding terminal 431 is exposed on the side of the wheel body through the terminal hole 4213 on the wheel body.

[0037] like Figure 4As shown, in order to achieve the function that after the charging cable 2 is pulled out to the required length, it can remain in the housing without retracting after the external force is released, and can only be fully retracted into the housing after the charging cable 2 is pulled out to an appropriate length again and released, the specific structure can be as follows: The coil spring winding mechanism 3 includes a wheel plate 31, the lower surface of the wheel plate 31 is fixedly connected to the upper end of the winding wheel 42, the upper surface of the wheel plate 31 is provided with a coil spring receiving groove 32, and a locking groove is provided around the coil spring receiving groove 32; a coil spring 30 is provided in the coil spring receiving groove 32, one end of the coil spring 30 is connected to the fixed shaft 41, and the other end is connected to the groove wall of the coil spring receiving groove 32; the locking groove includes an annular groove body 33, in which one or more guide locking blocks 34 and one or more guide blocks 35 are provided, and the guide locking blocks 34 and guide blocks 35 are in the annular groove body 33. The components are arranged alternately and sequentially in the body 33, dividing the annular groove body 33 into an inner ring and an outer ring. Specifically: the guide locking block 34 has a V-shaped groove 341 at its front end that engages with the locking pin of the locking member 5 to prevent the winding wheel 42 from rotating clockwise under the spring force; the guide locking block 35 also includes an outer side that guides the locking pin of the locking member 5 from the inner ring to the outer ring when the winding wheel 42 rotates counterclockwise; the guide block 35 includes a pin that, when the winding wheel 42 rotates counterclockwise, guides the pin that has disengaged from the V-shaped groove 341 to the tail end of the inner ring; the outer wall of the inner ring has an arc-shaped inner protrusion 36 that, when the winding wheel 42 rotates counterclockwise, guides the pin in the inner ring away to the outer side of the guide locking block 35; the inner wall of the outer ring has an arc-shaped outer protrusion 37 that, when the winding wheel rotates counterclockwise, guides the pin in the outer ring to the position where the V-shaped groove can engage when rotating clockwise. The working principle of the coil spring winding mechanism 3 is the same as the structural principle disclosed in the applicant's earlier utility model patent application number: CN2024233051060. The difference lies in the installation structure of the locking member 5 on the housing. (Refer to...) Figure 3 As shown, the locking member 5 includes a sliding seat 51 and a locking pin 52 vertically fixed on the sliding seat; the inner side of the upper shell 11 is provided with a T-shaped slide groove 111, the sliding seat 51 is disposed in the T-shaped slide groove 111, the sliding seat 51 can slide radially in the T-shaped slide groove 111 under the force of the locking pin 52, and the locking pin 52 extends from the T-shaped slide groove to the coil spring winding mechanism 3.

[0038] To further improve reliability and prevent the upper shell 11 and lower shell 12 from coming loose during use, the present invention also provides a locking fastener between the upper shell 11 and lower shell 12 via a fixing shaft 41, which can be locked and fixed by screws or rivets.

[0039] In summary, the conductive brush and conductive ring of this utility model adopt a unique structure and are installed on a fixed shaft and a winding wheel, which facilitates production and assembly, as well as welding with wires. It has low production cost and is stable and reliable.

Claims

1. A conductive shaft core for an automatic winding and storage mechanism for charging cables, comprising a fixed shaft and a winding wheel movably sleeved on the fixed shaft; characterized in that: The outer wall of the fixed shaft is provided with two or more sets of elastic conductive brushes; the winding wheel is assembled from a wheel body and an encapsulation block. The wheel body is provided with two or more sets of conductive ring limiting grooves. The groove opening of the conductive ring limiting groove is located on the connecting surface of the wheel body that is in contact with the encapsulation block. A conductive ring is provided in the conductive ring limiting groove. Each conductive ring is coaxially fixed in the wheel body and is elastically electrically connected to the elastic conductive brush on the outer wall of the fixed shaft.

2. The conductive shaft core of the automatic winding and storage mechanism for charging cables according to claim 1, characterized in that: The elastic conductive brush includes an arc-shaped elastic brush portion and an L-shaped lead portion; the lead portion is longitudinally embedded in the fixed shaft, with one end connected to the elastic brush portion and the other end led out from the end of the fixed shaft; the elastic brush portion elastically abuts against the inner surface of the conductive ring.

3. The conductive shaft core of the automatic winding and storage mechanism for charging cables according to claim 2, characterized in that: The elastic brush section and the lead section are an integral structure, and an annular positioning groove is provided on the fixed shaft to cooperate with and position the elastic brush section; the depth of the annular positioning groove is less than the height of the outer surface of the lead section when it is embedded in the fixed shaft; the positions of each lead section embedded in the fixed shaft are staggered.

4. The conductive shaft core of the automatic winding and storage mechanism for charging cables according to claim 1, characterized in that: The winding reel has a connecting groove on its connecting surface, and the encapsulation block has a connecting block corresponding to the connecting groove. A locking element is also inserted into the connecting block on the winding reel.

5. The conductive shaft core of the automatic winding and storage mechanism for charging cables according to claim 4, characterized in that: The wheel body has a terminal hole on the side opposite to the connecting surface; the conductive ring has a welding terminal on its outer wall, and the welding terminal protrudes from the side of the wheel body through the terminal hole on the wheel body.

6. An automatic winding and storage mechanism for charging cables, comprising an upper shell, a lower shell, a charging cable, and a coiling spring winding mechanism, characterized in that, It also includes the conductive shaft core as described in any one of claims 1 to 5; the two ends of the fixed shaft of the conductive shaft core are respectively fixedly connected to the upper shell and the lower shell, and the winding wheel is placed in the shell space formed by the upper shell and the lower shell; the coating layer of the tail end of the charging cable is fixedly connected to the encapsulation block, and each wire at the tail end of the charging cable is respectively welded to the conductive ring; the coil spring winding mechanism is installed on the side of the winding wheel; the inner side of the upper shell is provided with a locking clip that cooperates with the coil spring winding mechanism to lock.

7. The automatic winding and storage mechanism for charging cables according to claim 6, characterized in that: The coil spring take-up mechanism includes a wheel plate, the lower surface of which is fixedly connected to the upper end of the winding wheel. The upper surface of the wheel plate has a coil spring receiving groove and a locking groove surrounding the coil spring receiving groove. A coil spring is provided inside the coil spring receiving groove, one end of which is connected to a fixed shaft, and the other end is connected to the groove wall. The locking groove includes an annular groove body, within which one or more guide locking blocks and one or more guide blocks are provided. The guide locking blocks and guide blocks are alternately and spaced apart within the annular groove body, dividing the annular groove body into an inner ring and an outer ring. The front end of each guide locking block has a locking mechanism that engages with the locking groove. The locking pin of the component engages with a V-shaped groove to prevent the winding wheel from rotating clockwise under the action of the coil spring force; the guide locking block also includes an outer side that guides the locking pin from the inner ring to the outer ring when the winding wheel rotates counterclockwise; the guide block includes a locking pin that, when the winding wheel rotates counterclockwise, guides the locking pin that has disengaged from the V-shaped groove to the tail end of the inner ring; the outer wall of the inner ring is provided with an arc-shaped inner protrusion that, when the winding wheel rotates counterclockwise, guides the locking pin in the inner ring to the outer side of the guide locking block; the inner wall of the outer ring is provided with an arc-shaped outer protrusion that, when the winding wheel rotates counterclockwise, guides the locking pin in the outer ring to the position where the V-shaped groove can engage when rotating clockwise.

8. The automatic winding and storage mechanism for charging cables according to claim 6, characterized in that: The locking mechanism includes a sliding seat and a locking pin vertically fixed to the sliding seat; the inner side of the upper shell is provided with a T-shaped groove, the sliding seat is located in the T-shaped groove, and the locking pin extends from the T-shaped groove to the coil spring winding mechanism.

9. The automatic winding and storage mechanism for charging cables according to claim 6, characterized in that: The end of the charging cable and the encapsulation block are fixed by injection molding.

10. The automatic winding and storage mechanism for charging cables according to claim 6, characterized in that: The upper shell and the lower shell are also provided with a locking fastener via a fixed shaft.

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