High compatibility USB fast charging device

Abstract

The application relates to the technical field of chargers, and discloses a high-compatibility USB fast charging device, which comprises a charging head, the top of the charging head is fixedly connected with a conversion block, the top of the conversion block is provided with three mounting grooves, a front-side-opening telescopic wire reel is adaptively mounted in the mounting grooves, the outer wall of the telescopic wire reel is flush with the outer wall of the conversion block, a locking assembly is arranged between the mounting grooves and the telescopic wire reel, an elastic baffle is movably connected to the upper wall of the inner cavity of the conversion block and is inserted into the opening of the telescopic wire reel, and the elastic baffle is movably connected with the inner wall of the opening. The high compatibility and modularization of the USB fast charging device are realized, the faulty wire reel can be independently replaced, the overall maintenance cost is significantly reduced, the service life of the charging interface and the wire end is greatly prolonged, reliable temperature control under the high-power fast charging state is realized, the fast charging is stable, efficient and safe during the whole process, in addition, the device is compact and has no exposed protrusions, and the portability and the protection are simultaneously enhanced.

Description

Technical Field

[0001] This invention relates to the field of charger technology, and more specifically to a highly compatible USB fast charging device. Background Technology

[0002] With the increasing prevalence of car travel, the use of in-car cigarette lighter USB fast chargers is becoming more and more widespread. Simply plug it into the vehicle's 12V / 24V cigarette lighter socket to convert the vehicle's DC power into USB output, which can power and charge digital mobile devices such as mobile phones and tablets. Most products support multi-port output, fast charging adaptation, and overvoltage and overcurrent protection. They are compact, safe, and voltage-stabilized, and can meet the needs of charging multiple devices at the same time while driving. They are an essential in-car power accessory for driving.

[0003] Chinese patent application CN114156978A discloses an expandable multi-port USB fast charger for vehicles. It includes a charger body, an expansion bracket, a charging head assembly, and a clamping assembly. To charge a mobile phone, the charger body is inserted into the cigarette lighter socket in the vehicle. Pushing the charging head assembly connects the charging head to the transmission contacts, allowing the phone to be plugged in. No external wiring is required, preventing interference with the driver's operation of the vehicle and ensuring driving safety.

[0004] Most existing multi-port USB fast chargers for cars do not come with a built-in charging cable, requiring an additional data cable to power devices. To address this issue, retractable cable reel car chargers have emerged, relying on a reel with a spiral spring and a locking mechanism to allow for free extension and retraction of the data cable. However, these retractable cable reels are often fixedly installed as an integral part of the charging head, making them impossible to replace separately if damaged, resulting in high maintenance costs. Furthermore, as described in the aforementioned patent, conventional car chargers often have exposed charging heads, making them susceptible to dust, moisture, and impact damage. The numerous exposed protrusions also compromise portability and protection. When multiple devices are charging simultaneously, poor heat dissipation and overheating can occur, leading to a decrease in charging power. Summary of the Invention

[0005] The purpose of this invention is to address the problems of high maintenance costs, poor portability and protection, and power attenuation when charging multiple devices simultaneously, that exist in general in-vehicle multi-port USB fast chargers. This invention provides a highly compatible USB fast charging device.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A highly compatible USB fast charging device includes a charging head, a conversion block fixedly connected to the top of the charging head, the conversion block having three mounting slots on its top, a telescopic cable reel with a front opening adapted to be installed in the mounting slots, the outer wall of the telescopic cable reel being flush with the outer wall of the conversion block, a locking component being provided between the mounting slots and the telescopic cable reel, a spring baffle being rotatably connected to the upper wall of the inner cavity of the conversion block and movably inserted into the opening of the telescopic cable reel, the spring baffle being movably connected to the inner wall of the opening, and a limiting component for fixing the spring baffle being provided on the rear wall of the conversion block;

[0008] The conversion block has linearly distributed heat dissipation grooves on both its front and rear walls. A heat dissipation plate is slidably inserted into the heat dissipation groove. A notch is provided on the right side of the heat dissipation groove and the heat dissipation plate, and a micro fan is fixedly connected in the notch. The micro fan has tapered openings on both the left and right sides. An adjustment component is provided at the bottom of the inner cavity of the conversion block to drive the heat dissipation plate to move inward by a fixed distance.

[0009] Furthermore, the upper side of the telescopic cable reel is a large semicircle and the lower side is a small semicircle. The outer perimeter of the middle part of the telescopic cable reel is chamfered. The top perimeter of the conversion block is arc-shaped to fit the telescopic cable reel, and the lower part of the conversion block is rectangular.

[0010] Furthermore, a USB plug is provided at the bottom of the mounting slot, and a slot that is adapted to and electrically connected to the USB plug is provided at the bottom of the telescopic cable reel. An annular seal corresponding to the telescopic cable reel is provided in the middle of the mounting slot.

[0011] Furthermore, the limiting component includes a keyway penetrating the rear wall of the conversion block, in which a suitable elastic rod is slidably and sealedly inserted, and the elastic rod is provided with three sets of one-way exhaust ports and through ports;

[0012] The elastic baffle is arc-shaped and has a rough surface on its top outer wall. The telescopic cable reel opening is provided with a telescopic cable head inside the elastic baffle. The upper rear wall of the inner cavity of the conversion block is provided with an arc-shaped sealing groove that is adapted to the elastic baffle. The rear wall of the conversion block has three through slots that are respectively connected to the corresponding one-way exhaust port and sealing slot.

[0013] Furthermore, the locking assembly includes L-shaped locking grooves respectively opened on the front and rear walls of the conversion block, and L-shaped elastic pressure blocks are slidably engaged in the locking grooves. The lower walls on both the front and rear sides of the telescopic coil are fixedly connected with L-shaped hooks extending into the locking grooves. The inner wall of the elastic pressure block has a groove corresponding to the hook, and the lower wall of the hook has an inclined surface.

[0014] Furthermore, the adjustment assembly includes a T-shaped plate fixedly connected to the inner side of the heat sink plate, a pin fixedly connected to the upper inner wall of the T-shaped plate, a crossbeam provided in the middle of the inner cavity of the conversion block, a torque disk rotatably connected to the lower wall of the crossbeam, a torsion spring provided between the bottom of the torque disk and the crossbeam, two guide grooves in a circular array on the torque disk, the guide grooves being movably engaged with the corresponding pins, the guide grooves being composed of an outer arc groove, a middle arc groove, and an inner arc groove connected from the outside to the inside, wherein the radius of the circle corresponding to the area swept by the inner and outer arc grooves is fixed.

[0015] Furthermore, the adjustment assembly also includes two guide wheels rotatably connected to the front side of the crossbeam, three L-shaped elastic plates slidably engaged at the upper end of the crossbeam and located below the corresponding mounting slots, a lever for squeezing the L-shaped elastic plates is fixedly connected to the front end of the elastic baffle, a rotating roller is rotatably connected to the upper left side of the L-shaped elastic plate, the rotating roller and the guide wheels are arranged alternately, and a pull rope is fixedly connected to the left rotating roller, passing around the other guide wheels and rotating roller in sequence, and fixedly connected to the front end of the torque disc.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention achieves high compatibility and modular adaptation of USB fast charging devices by integrating the charging head, conversion block and multiple sets of telescopic cable reels into a single design. With the use of locking components, the telescopic cable reels can be quickly disassembled and replaced, enabling independent replacement of faulty cable reels and significantly reducing overall maintenance costs. Furthermore, the elastic baffle seals the telescopic cable head, effectively blocking dust, moisture and external impacts, greatly extending the service life of the charging interface and cable end. In addition, the device is neat and has no exposed protrusions, enhancing both portability and protection.

[0018] 2. This invention automatically controls the inward movement of the heat sink based on the number of telescopic cable reels in use, increasing the heat dissipation area. The micro fan starts synchronously with the multi-port fast charging, forming a directional airflow to enhance heat exchange and achieve reliable temperature control under high-power fast charging conditions. Combined with the initial design of the heat sink and heat dissipation groove being flush, it not only avoids dust accumulation when idle, but also allows for rapid expansion of heat dissipation during operation. Structurally, it solves the overheating problem of multiple devices charging simultaneously, ensuring stable, efficient, and safe fast charging throughout the entire process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a first-view perspective three-dimensional cross-sectional view of the conversion block portion of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the telescopic coil portion of the present invention;

[0022] Figure 4This is a three-dimensional cross-sectional view of the conversion block and elastic rod portion of the present invention;

[0023] Figure 5 This is a second-view perspective three-dimensional cross-sectional view of the conversion block portion of the present invention;

[0024] Figure 6 This is a separate diagram of the heat sink and the micro fan of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the conversion block and mounting groove of the present invention.

[0026] Reference numerals: 1. Charging head; 2. Adapter block; 21. Mounting slot; 22. USB plug; 23. Locking slot; 24. Elastic pressure block; 25. Elastic baffle; 26. Toggle block; 3. Telescopic cable reel; 31. Slot; 32. Hook; 4. Elastic rod; 41. One-way exhaust port; 42. Through port; 5. Heat dissipation slot; 51. Heat dissipation plate; 52. T-shaped plate; 53. Pin; 54. Torque disc; 55. Guide groove; 56. Guide wheel; 57. L-shaped elastic plate; 58. Rotating roller; 59. Pull rope; 6. Miniature fan. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0028] Example 1, as Figures 1-7 As shown, a highly compatible USB fast charging device includes a charging head 1, a conversion block 2 fixedly connected to the top of the charging head 1, and three mounting slots 21 on the top of the conversion block 2. A telescopic cable reel 3 with a front opening is adapted to be installed in the mounting slots 21. The outer wall of the telescopic cable reel 3 is flush with the outer wall of the conversion block 2. A locking component is provided between the mounting slots 21 and the telescopic cable reel 3. A spring baffle 25 is rotatably connected to the upper wall of the inner cavity of the conversion block 2 and is movably inserted into the opening of the telescopic cable reel 3. A telescopic cable head is provided in the opening of the telescopic cable reel 3 and is located inside the spring baffle 25. The spring baffle 25 is movably connected to the inner wall of the opening. A limiting component for fixing the spring baffle 25 is provided on the rear wall of the conversion block 2.

[0029] The front and rear walls of the conversion block 2 are provided with linearly distributed heat dissipation grooves 5. A heat dissipation plate 51 is slidably inserted into the heat dissipation groove 5. A notch is provided on the right side of the heat dissipation groove 5 and the heat dissipation plate 51, and a micro fan 6 is fixedly connected in the notch. The micro fan 6 has tapered openings on both the left and right sides. An adjustment component is provided at the bottom of the inner cavity of the conversion block 2 to drive the heat dissipation plate 51 to move inward at a fixed distance.

[0030] In use, the converter block 2 is equipped with three retractable cable reels 3 with different output connectors and supporting fast charging protocols. The retractable cable reels 3 are connected to the mounting slot 21 via a locking component, facilitating easy replacement if damaged. The use of the three retractable cable reels 3 provides wireless charging for different mobile devices. After the retractable cable reels 3 are installed, the retractable cable head inside the elastic baffle 25 is protected, preventing dust accumulation and damage from prolonged exposure. When charging is needed, the charging head 1 is connected to the cigarette lighter socket, and the corresponding elastic baffle 25 is pressed down, compressing it and lowering its top to the underside of the opening of the retractable cable reel 3. The elastic baffle 25 is then restrained by the limiting component. The control cannot be reset, so the telescopic cable head can be pulled out to charge the mobile device. When at least two elastic baffles 25 are in place, the adjustment component automatically drives the heat sink 51 to move inward at a fixed distance, increasing the heat dissipation area of ​​the outer wall of the conversion block 2. The conversion block 2 controls the micro fan 6 to run when at least two telescopic cable reels 3 are running, based on the number of telescopic cable reels 3 in operation. Since the left and right sides of the micro fan 6 are connected to the outside, air is drawn in from the right cone and blown out from the left cone, actively enhancing airflow, improving the charging heat dissipation efficiency under high power, and maintaining charging stability. After all telescopic cable reels 3 are fully charged and the telescopic cable head is reset, the limit component can be used to release the limit of each elastic baffle 25, and the elastic baffle 25 resets under its own elastic force.

[0031] In Example 2, based on the above examples, the upper side of the telescopic coil 3 is a large semicircle and the lower side is a small semicircle. The outer perimeter of the middle part of the telescopic coil 3 is chamfered. The top perimeter of the conversion block 2 is adapted to the telescopic coil 3 in an arc shape, and the lower part of the conversion block 2 is rectangular.

[0032] With the outer wall of the telescopic cable reel 3 flush with the outer wall of the conversion block 2, the telescopic cable reel 3 fits perfectly after installation without protruding. The top outer edge of the conversion block 2 is arc-shaped and the lower part is rectangular, thus ensuring the neatness of the charger's exterior. This not only makes it aesthetically pleasing but also reduces the risk of bumps and damage from the straps, making it easy to store and improving its practicality.

[0033] The bottom of the mounting slot 21 is provided with a USB plug 22, and the bottom of the telescopic cable reel 3 has a slot 31 that is compatible with and electrically connected to the USB plug 22. The middle of the mounting slot 21 is provided with an annular seal corresponding to the telescopic cable reel 3.

[0034] After the telescopic cable reel 3 is installed, its bottom slot 31 is electrically connected to the USB plug 22 at the bottom of the mounting slot 21. Utilizing the chamfered design of the outer periphery of the telescopic cable reel 3, the mounting slot 21 also has a chamfered design in the middle, which facilitates the sealing function of the annular seal and prevents external moisture from corroding the slot 31 and the USB plug 22.

[0035] In embodiment three, based on the above embodiments, the limiting component includes a keyway that penetrates the rear wall of the conversion block 2, and a matching elastic rod 4 is slidably and sealed in the keyway. The elastic rod 4 has three sets of one-way exhaust ports 41 and through ports 42.

[0036] The elastic baffle 25 is arc-shaped and has a rough surface on its top outer wall. The upper rear wall of the inner cavity of the conversion block 2 is provided with an arc-shaped sealing groove that is compatible with the elastic baffle 25. The rear wall of the conversion block 2 has three through slots that are respectively connected to the corresponding one-way exhaust port 41 and the sealing groove.

[0037] The rough surface design of the outer wall of the elastic baffle 25 facilitates its movement. Initially, each arc-shaped sealing groove is connected to the through groove and the one-way exhaust port 41. When the elastic baffle 25 is moved and pressed to deflect counterclockwise into place, the air in the corresponding arc-shaped sealing groove is discharged. The elastic baffle 25 cannot be reset under air pressure. However, by pressing the right end of the elastic rod 4 to move it to the left, each through port 42 and through groove is connected to the corresponding arc-shaped sealing groove, allowing air to be replenished from the outside. The elastic baffle 25 is then reset under its own elastic force, thus achieving integrated control of the reset of each elastic baffle 25, making it convenient to use.

[0038] In embodiment four, based on the above embodiments, the locking component includes L-shaped locking grooves 23 respectively opened on the front and rear walls of the conversion block 2. An L-shaped elastic pressure block 24 is slidably engaged in the locking groove 23. The lower walls of the front and rear sides of the telescopic coil 3 are fixedly connected with L-shaped hooks 32 extending into the locking grooves 23. The inner wall of the elastic pressure block 24 has a groove corresponding to the hook 32, and the lower wall of the hook 32 has an inclined surface.

[0039] When the telescopic cable reel 3 needs to be replaced, press the corresponding elastic baffle 25 down to its position, and simultaneously press the corresponding elastic blocks 24 on the front and rear sides to disengage from the hooks 32, so that the telescopic cable reel 3 can be quickly disassembled. When installing a new telescopic cable reel 3, control the hooks 32 on the front and rear sides to insert into the locking grooves 23. The hooks 32 can automatically push open the elastic blocks 24 using the inclined surface at the bottom, and finally lock into the slots on the elastic blocks 24.

[0040] In Example 5, based on the above examples, the adjustment component includes a T-shaped plate 52 fixedly connected to the inner side of the heat sink 51. A pin 53 is fixedly connected to the upper inner wall of the T-shaped plate 52. A crossbeam is provided in the middle of the inner cavity of the conversion block 2. A torque disk 54 is rotatably connected to the lower wall of the crossbeam. A torsion spring is provided between the bottom of the torque disk 54 and the crossbeam. Two guide grooves 55 in a circular array are provided on the torque disk 54. The guide grooves 55 are movably engaged with the corresponding pins 53. The guide grooves 55 are composed of an outer arc groove, a middle arc groove, and an inner arc groove connected from the outside to the inside. The radius of the circle corresponding to the area swept by the inner and outer arc grooves is fixed.

[0041] The outer end of the initial heat sink 51 is flush with the outer wall of the heat sink 5, and the outer wall of the conversion block 2 is smooth, ensuring that when the charger is not in use, there are no external dents that can trap dirt and grime, and the inlet and outlet of the micro fan 6 are sealed to reduce dust entry.

[0042] The adjustment assembly also includes two guide wheels 56 rotatably connected to the front side of the crossbeam. Three L-shaped elastic plates 57 are slidably engaged at the upper end of the crossbeam and located below the corresponding mounting slots 21. A lever 26 for pressing the L-shaped elastic plates 57 is fixedly connected to the front end of the elastic baffle 25. A rotating roller 58 is rotatably connected to the upper left side of the L-shaped elastic plate 57. The rotating roller 58 and the guide wheels 56 are arranged alternately. A pull rope 59 is fixedly connected to the left rotating roller 58, passing around the other guide wheels 56 and the rotating roller 58 in sequence, and is fixedly connected to the front end of the torque disc 54.

[0043] When a telescopic reel 3 is used and the elastic baffle 25 is pushed down to the position, the elastic baffle 25 drives the lever 26 to push the L-shaped elastic plate 57 backward, thereby driving the pull rope 59 to pull the torque plate 54 to deflect. The pin 53 is relatively stationary and passively moves along the outer arc groove in the guide groove 55. The T-shaped plate 52 does not drive the heat sink 51 to move. When any other telescopic reel 3 is used, the corresponding L-shaped elastic plate 57 is pushed backward, and the pull rope 59 continues to pull the torque plate 54 to deflect, thereby driving the middle arc groove in the guide groove 55 to press the pin 53, causing the T-shaped plates 52 on both sides to drive the heat sink 51 to move inward. The micro fan 6 automatically runs to draw in air from the right cone opening and blow air out from the left cone opening, actively strengthening the airflow, improving the charging heat dissipation efficiency under high power, and maintaining charging stability.

[0044] When the remaining telescopic reel 3 is used, the corresponding L-shaped elastic plate 57 is squeezed backward, the pull rope 59 continues to pull the torque plate 54 to deflect, the pin 53 remains relatively stationary and passively moves along the inner arc groove in the guide groove 55, the heat sink 51 will not move excessively inward, but the conversion block 2 automatically adjusts the micro fan 6 to increase the heat dissipation power according to the charging power, so as to ensure that when at least two telescopic reels 3 are used, the charger will start active heat dissipation, improve charging stability and reliability. After the elastic baffles 25 are reset, the torque plate 54 and the L-shaped elastic plate 57 will automatically reset under their own elasticity, and the corresponding heat sink 51 will be driven to reset.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly compatible USB fast charging device, comprising a charging head (1), characterized in that, The top of the charging head (1) is fixedly connected to a conversion block (2). The top of the conversion block (2) has three mounting slots (21). A telescopic cable reel (3) with a front opening is adapted to be installed in the mounting slot (21). The outer wall of the telescopic cable reel (3) is flush with the outer wall of the conversion block (2). A locking component is provided between the mounting slot (21) and the telescopic cable reel (3). A spring baffle (25) is rotatably connected to the upper wall of the inner cavity of the conversion block (2) and is movably inserted into the opening of the telescopic cable reel (3). The spring baffle (25) is movably connected to the inner wall of the opening. A limiting component for fixing the spring baffle (25) is provided on the rear wall of the conversion block (2). The conversion block (2) has linearly distributed heat dissipation grooves (5) on both the front and rear walls. A heat dissipation plate (51) is slidably inserted into the heat dissipation groove (5). A notch is provided on the right side of the heat dissipation groove (5) and the heat dissipation plate (51), and a micro fan (6) is fixedly connected in the notch. The micro fan (6) has tapered openings on both the left and right sides. An adjustment component is provided at the bottom of the inner cavity of the conversion block (2) to drive the heat dissipation plate (51) to move inward at a fixed distance.

2. The highly compatible USB fast charging device according to claim 1, characterized in that, The telescopic coil (3) has a large semicircle on the upper side and a small semicircle on the lower side. The outer perimeter of the middle part of the telescopic coil (3) is chamfered. The outer perimeter of the top of the conversion block (2) is arc-shaped and adapted to the telescopic coil (3). The lower part of the conversion block (2) is rectangular.

3. The highly compatible USB fast charging device according to claim 2, characterized in that, The bottom of the mounting groove (21) is provided with a USB plug (22), the bottom of the telescopic cable reel (3) has a slot (31) that is adapted to and electrically connected to the USB plug (22), and the middle of the mounting groove (21) is provided with an annular seal corresponding to the telescopic cable reel (3).

4. The highly compatible USB fast charging device according to claim 3, characterized in that, The limiting component includes a keyway that penetrates the rear wall of the conversion block (2), and a suitable elastic rod (4) is slidably and sealed in the keyway. The elastic rod (4) has three sets of one-way exhaust ports (41) and through ports (42). The elastic baffle (25) is arc-shaped and has a rough surface on its top outer wall. The telescopic coil (3) has a telescopic wire head inside the elastic baffle (25) in its opening. The upper rear wall of the inner cavity of the conversion block (2) has an arc-shaped sealing groove that is adapted to the elastic baffle (25). The rear wall of the conversion block (2) has three through slots that are respectively connected to the corresponding one-way exhaust port (41) and the sealing groove.

5. A highly compatible USB fast charging device according to claim 4, characterized in that, The locking assembly includes L-shaped locking grooves (23) respectively opened on the front and rear walls of the conversion block (2). An L-shaped elastic pressure block (24) is slidably engaged in the locking groove (23). The lower walls of the front and rear sides of the telescopic coil (3) are fixedly connected with L-shaped hooks (32) extending into the locking groove (23). The inner wall of the elastic pressure block (24) has a groove corresponding to the hook (32). The lower wall of the hook (32) has an inclined surface.

6. A highly compatible USB fast charging device according to claim 5, characterized in that, The adjustment assembly includes a T-shaped plate (52) fixedly connected to the inner side of the heat sink (51). A pin (53) is fixedly connected to the upper inner wall of the T-shaped plate (52). A crossbeam is provided in the middle of the inner cavity of the conversion block (2). A torque disk (54) is rotatably connected to the lower wall of the crossbeam. A torsion spring is provided between the bottom of the torque disk (54) and the crossbeam. Two guide grooves (55) in a circular array are opened on the torque disk (54). The guide grooves (55) are movably engaged with the corresponding pins (53). The guide grooves (55) are composed of an outer arc groove, a middle arc groove, and an inner arc groove connected from the outside to the inside. The radius of the circle corresponding to the area swept by the inner and outer arc grooves is fixed.

7. A highly compatible USB fast charging device according to claim 6, characterized in that, The adjustment assembly also includes two guide wheels (56) rotatably connected to the front side of the crossbeam. Three L-shaped elastic plates (57) located below the corresponding mounting slots (21) are slidably engaged at the upper end of the crossbeam. A paddle (26) for squeezing the L-shaped elastic plate (57) is fixedly connected to the front end of the elastic baffle (25). A rotating roller (58) is rotatably connected to the upper left side of the L-shaped elastic plate (57). The rotating roller (58) and the guide wheels (56) are arranged alternately. A pull rope (59) is fixedly connected to the left rotating roller (58) and passes around the other guide wheels (56) and the rotating roller (58) in sequence, and is fixedly connected to the front end of the torque plate (54).

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