Charging device

Abstract

The utility model provides a charging device. The charging device comprises a wire box; the wire body is at least partially arranged in the wire box, and at least one end of the wire body can stretch out and draw back relative to the wire box so as to adjust the extension length of the wire body relative to the wire box; at least part of the position detection mechanism is arranged in the wire box, and the position detection mechanism is configured to obtain position information of the wire body; and the power adjusting mechanism is electrically connected with the position detection mechanism and the wire body, and is configured to determine the extension length of the wire body relative to the wire box based on the position information, and control the output power of the wire body based on the extension length. Through the mode, the output power of the wire body can be adjusted according to the extension length of the wire body relative to the wire box, so that the output power is improved while the heat dissipation performance and the like are ensured.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to a charging device. Background Technology

[0002] With the increasing variety of consumer electronics products and the growing number of electronic devices purchased and used in households, especially charging devices that support Power Delivery (PD) fast charging protocols and come equipped with complete Type-C (USB interface for communication and charging) cables, the need for multiple cables to connect to charging devices when using multiple ports simultaneously becomes apparent. After use, these cables are often scattered across the desktop, posing a challenge to storage and desktop tidiness. Therefore, retractable cables, or cables with a retractable function, become essential. After use, they can be neatly stored inside chargers or power strips, improving the tidiness of office or home desktops.

[0003] However, because the cable has a certain impedance, it generates significant heat when retracted inside the device, accounting for a large proportion of the total charging power loss. Furthermore, the temperature limits defined by regulations are relatively high, exceeding 100°C. Safety regulations only consider whether the cable itself meets the requirements, but do not take into account the user's actual experience. For example, if the cable is retracted and continuously charging an external device, and then pulled out, it will feel extremely hot to the touch, potentially causing burns. Therefore, conventional designs limit its operating temperature and design power based on worst-case conditions. However, this approach limits the output power of both the cable and the entire device. Utility Model Content

[0004] In view of the above problems, this application provides a charging device that adjusts the output power of the cable according to the extension length of the cable relative to the cable box, thereby improving the output power while ensuring heat dissipation performance, etc.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is conceived as follows:

[0006] This application provides a charging device, comprising: a cable box; a cable, at least partially installed inside the cable box, at least one end of the cable being extendable and retractable relative to the cable box to adjust the extension length of the cable relative to the cable box; a position detection mechanism, at least partially disposed in the cable box and configured to acquire position information of the cable; and a power adjustment mechanism, electrically connected to the position detection mechanism and the cable, configured to determine the extension length of the cable relative to the cable box based on the position information, and control the output power of the cable based on the extension length.

[0007] In some embodiments, the position detection mechanism includes: a rotating bracket, at least partially movably connected to the cable box, and the cable is wound around the rotating bracket such that at least one end of the cable extends or retracts relative to the cable box, causing the rotating bracket to rotate; and a detection component configured to acquire position information of the rotating bracket as position information of the cable.

[0008] In some embodiments, the position information includes voltage value information; the rotating bracket includes a conductive strip that extends and winds along the winding direction x of the wire; the conductive strip rotates as the wire extends and retracts; and the two ends of the conductive strip are configured to form a preset voltage difference; the detection component includes an electrical detector fixedly disposed in the wire box; the electrical detector is slidably electrically connected to the conductive strip and electrically connected to the power adjustment mechanism; the power adjustment mechanism determines the extension length of the wire relative to the wire box based on the voltage value information output by the electrical detector.

[0009] In some embodiments, the position information includes deformation information, the rotating bracket includes a deformation strip extending wound along the winding direction of the wire; the wire box is provided with a fixing post, the center segment of the deformation strip is fixedly connected to the fixing post, and the wound end of the deformation strip deforms with the extension and contraction of the wire; the detection component includes a deformation detection element disposed on the deformation strip and configured to acquire the deformation information of the deformation strip; the deformation detection element is electrically connected to the power adjustment mechanism, and the power adjustment mechanism determines the extension length of the wire relative to the wire box based on the deformation information.

[0010] In some embodiments, the deformation information includes pressure information; the deformation detection element includes a pressure sensor disposed between the fixed column and the center segment, configured to acquire pressure information of the center segment; the pressure sensor is electrically connected to the power adjustment mechanism, and the power adjustment mechanism determines the extension length of the line relative to the cable box based on the pressure information.

[0011] In some embodiments, the rotating bracket is provided with a preset detection point, and the detection component is configured to acquire the position information of the preset detection point as the position information of the line body.

[0012] The detection component includes a signal generating component mounted on the rotating bracket and multiple switches fixedly disposed relative to the cable box. The preset detection points include multiple locking points, each electrically connected to the signal generating component. The signal generating component provides detection signals to each locking point. Each switch corresponds to one locking point and is electrically connected to the power adjustment mechanism and its corresponding locking point. Each locking point is configured to lock the cable when it rotates to the corresponding switch as the cable extends or retracts, closing the corresponding switch so that the power adjustment mechanism receives the corresponding detection signal. Different locking points or combinations of locking points result in different extension lengths of the cable relative to the cable box when locking the cable. The power adjustment mechanism determines the extension length of the cable relative to the cable box based on the detection signals from the locking points.

[0013] In some embodiments, the position information includes sensing information, and the rotating bracket is movably connected to the cable box; the detection component includes a first sensing element and a second sensing element, one of which is fixedly disposed relative to the cable box, and the other is disposed at the preset detection point; the second sensing element is electrically connected to the power adjustment mechanism, and the power adjustment mechanism determines the extension length of the cable relative to the cable box based on the sensing information of the second sensing element.

[0014] In some embodiments, the sensing information includes optical information, the first sensing element includes a light emitter, the second sensing element includes a light receiver, and the power adjustment mechanism determines the extension length of the cable relative to the cable box based on the optical information of the light receiver.

[0015] In some embodiments, the sensing information includes magnetic information, the first sensing element includes a magnetic induction element, the second sensing element includes a magnetic element, and the power adjustment mechanism determines the extension length of the cable relative to the cable box based on the magnetic information of the magnetic induction element.

[0016] The advantages of the embodiments of this application, which differ from the prior art, are as follows: The charging device proposed in this application includes a cable box, a cable body, a position detection mechanism, and a power adjustment mechanism; wherein, the cable body is at least partially installed in the cable box, and at least one end of the cable body can extend and retract relative to the cable box to adjust the extension length of the cable body relative to the cable box; the position detection mechanism is at least partially disposed in the cable box and configured to acquire the position information of the cable body; the power adjustment mechanism is electrically connected to the position detection mechanism and the cable body, and is configured to determine the extension length of the cable body relative to the cable box based on the position information, and control the output power of the cable body based on the extension length. In this way, this application can utilize a position detection mechanism to obtain the position information of the cable, and a power adjustment mechanism can determine the extension length of the cable relative to the charging box based on the position information. The output power of the cable can then be adjusted based on this extension length. This allows for different output power allocations when the cable is at different extension lengths. For example, a longer extension length means a longer cable length outside the charging box and a shorter length inside the box. This results in less cable loss inside the box and a lower internal temperature. In this case, a larger output power can be allocated to the cable to increase the output power of the charging device without causing excessive temperature or loss. Therefore, this application can adjust the output power of the cable according to its extension length, thereby increasing the output power while ensuring heat dissipation performance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of a portion of the structure of an embodiment of the charging device of this application;

[0019] Figure 2 This is a schematic diagram of a portion of the structure of an embodiment of the charging device of this application;

[0020] Figure 3 This is a schematic diagram of the structure of an embodiment of the junction box and position detection mechanism of this application;

[0021] Figure 4 This is a schematic diagram of another embodiment of the junction box and position detection mechanism of this application;

[0022] Figure 5 This is a schematic diagram of the structure of an embodiment of the rotating bracket of this application;

[0023] Figure 6 This is a schematic diagram of the connection structure between the power adjustment mechanism and the locking point in this application;

[0024] Figure 7 This is a structural schematic diagram of another embodiment of the junction box and position detection mechanism of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] This application proposes a charging device, such as Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of a portion of the structure of an embodiment of the charging device of this application; Figure 2 This is a schematic diagram of a partial structure of a charging device according to an embodiment of this application. The charging device (not shown) of this embodiment includes: a cable box 10, a cable 20, a position detection mechanism 30, and a power adjustment mechanism 40; wherein, the cable 20 is at least partially installed inside the cable box 10, and at least one end of the cable 20 is retractable relative to the cable box 10 to adjust the extension length of the cable 20 relative to the cable box 10; the position detection mechanism 30 is at least partially disposed in the cable box 10 and configured to acquire the position information of the cable 20; the power adjustment mechanism 40 is electrically connected to the position detection mechanism 30 and the cable 20, and is configured to determine the extension length of the cable 20 relative to the cable box 10 based on the position information, and control the output power of the cable 20 based on the extension length.

[0031] The cable 20 has an input end and an output end, and the input end and / or output end can be extended or retracted relative to the cable box 10 to adjust the extension length of the cable 20. For the sake of simplicity, this application describes the cable 20 as having one end that is extendable or retractable relative to the cable box 10.

[0032] This embodiment utilizes the position detection mechanism 30 to acquire the position information of the cable 20, and the power adjustment mechanism 40 determines the extension length of the cable 20 relative to the cable box 10 based on the position information. It then adjusts the output power of the cable 20 based on the extension length, enabling the allocation of different output power when the cable 20 is at different extension lengths. For example, the longer the extension length of the cable 20, the longer its length outside the cable box 10, and the shorter its length inside the cable box 10. This results in less cable loss inside the cable box 10 and a lower internal temperature. In this case, a larger output power can be allocated to the cable 20 to increase the output power of the charging device without causing excessive temperature or loss. Therefore, this embodiment can adjust the output power of the cable 20 according to its extension length, thereby increasing the output power while ensuring heat dissipation performance.

[0033] The extension length is relative to the initial state of the cable 20. The initial state can be the state when the cable 20 is reset and stored in the cable box 10, that is, the state where the extension length of the cable 20 is the shortest. Of course, the initial state can also be the state when the cable 20 is stretched or compressed to a preset length.

[0034] In some embodiments where both ends of the cable 20 are retractable, the cable 20 can be divided into two connected segments. The connection point between these two segments can be fixed relative to the cable box 10, or subject to a limited movement setting. Each of these segments can be equipped with a corresponding position detection mechanism 30 to acquire the position information of its respective segment. These two segments can share the same power adjustment mechanism 40. The power adjustment mechanism 40 determines the extension length of both ends based on the position information of the two segments and controls the output power of the cable 20 based on the extension length of the two segments. Its principle is similar to that of a power adjustment mechanism that is retractable at one end.

[0035] The power adjustment mechanism 40 can be a microprocessor unit, etc. The position information output by the position detection mechanism 30 is a voltage signal. The microprocessor unit determines the extension length of the line 20 based on the voltage signal and controls the output power of the line 20 based on the extension length.

[0036] The junction box 10 forms a receiving cavity (not shown) and a first through hole (not shown) and a second through hole (not shown) communicating with the receiving cavity. The cable 20 and the position detection mechanism 30 can be located inside the receiving cavity. The two ends of the cable 20 are electrically connected to external electronic equipment through the first through hole and the second through hole, respectively. The power adjustment mechanism 40 can be located inside or outside the receiving cavity, etc., without specific limitation.

[0037] In some embodiments, the charging device may further include a power supply mechanism (not shown), capable of supplying power to at least the power adjustment mechanism 40 and the position detection mechanism 30. The power supply mechanism may be a power supply unit or a power supply circuit for electrical connection to an external power source. Specific implementations of the power supply unit, power supply circuit, etc., can be found in related technologies in the art.

[0038] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of an embodiment of the junction box and position detection mechanism of this application. The position detection mechanism 30 of this embodiment includes: a rotating bracket 31 and a detection component 32; wherein, the rotating bracket 31 is at least partially movably connected to the junction box 10, and the cable 20 is wound around the rotating bracket 31 so that the rotating bracket 31 rotates when the cable 20 extends or retracts relative to the junction box 10; the detection component 32 is configured to acquire the position information of the rotating bracket 31 as the position information of the cable 20 relative to the junction box 10.

[0039] The position information of the rotating bracket 31 is the position information of the rotating bracket 31 relative to the junction box 10 or relative to other components or parts fixedly installed with the junction box 10.

[0040] The rotating bracket 31 is at least partially movably connected to the junction box 10. When the cable 20 extends or retracts relative to the junction box 10, it causes the rotating bracket 31 to rotate. This means that the inner end of the rotating bracket 31, i.e., the end closer to the center of rotation, can be fixedly or movably connected to the junction box 10, while the other parts of the rotating bracket 31 can rotate with the extension and retraction of the cable 20. Therefore, the position information of the cable 20 can be obtained by detecting the position information of the rotating bracket 31.

[0041] The extension and retraction of the line 20 and the rotation of the rotating bracket 31 can be completely synchronized or synchronized in a certain proportion, depending on the actual situation.

[0042] In this embodiment, the position information of the cable 20 is obtained by using the position information of the rotating bracket 31. This reduces the interference of the detection component 32 and other components on the cable 20, improves the reliability of its electrical signal transmission and extension, and the synchronous movement of the rotating bracket 31 and the cable 20 improves the detection accuracy of the extension length of the cable 20 relative to the cable box 10, thereby improving the reliability of the output power adjustment.

[0043] The aforementioned position information is a voltage signal, which can be a voltage signal representing voltage value information, a voltage signal representing deformation information, a voltage signal representing pressure information, a voltage signal representing light information, a voltage signal representing magnetic information, etc.

[0044] In some embodiments, such as Figure 3As shown, the position information includes voltage value information. The rotating bracket 31 includes a conductive strip 311 that extends and winds along the winding direction x of the wire body 20. The conductive strip 311 rotates as the wire body 20 extends and retracts, and a preset voltage difference is formed at both ends of the conductive strip 311. The detection component 32 includes an electrical detector 321 fixedly disposed in the wire box 10. The electrical detector 321 is slidably electrically connected to the conductive strip 311 and electrically connected to the power adjustment mechanism 40. The power adjustment mechanism 40 determines the extension length of the wire body 20 relative to the wire box 10 based on the voltage value information output by the electrical detector 321.

[0045] The voltage value output by the electrical detector 321 is the voltage division value of the preset voltage difference.

[0046] In this embodiment, a potentiometer structure is implemented using a conductive strip 311 and an electrical probe 321. When the cable 20 extends or retracts, it rotates the conductive strip 311, causing a change in the relative position between the electrical probe 321 and the conductive strip 311. This results in a change in the voltage value output by the electrical probe 321, and the power adjustment mechanism 40 can determine the extension length of the cable 20 relative to the cable box 10 based on this voltage value.

[0047] In one embodiment, the conductive strip 311 can be an elastic conductive element such as a spring. The power supply mechanism can configure a preset voltage difference between the two ends of the conductive strip 311. Since the spring is metal and has a certain impedance, it can be made into a potentiometer. By detecting the voltage value at the preset detection point after the spring is unfolded, the stretching length of the wire 20 can be determined. The adjacent surfaces of the spring need to be basically insulated. Its starting end is defined as point A (voltage value is 0), the ending end is defined as point C, and the preset detection point is point B. A fixed voltage, i.e., the preset voltage difference, is applied between point C and point A, so that there is a constant current between point C and point A. Point B is a fixed position point. When the stretching length of the wire 20 (which can be quantified by the number of stretching turns) is different, according to the voltage formula: the voltage at point B V = I*R, where R is the impedance of the spring and is related to the spring length between point A and point B. It can be seen that the voltage value at point B is different when the wire body 20 is stretched to different lengths. The mapping relationship between the two can be obtained. In actual use, the extension length of the wire body 20 relative to the wire box 10 can be obtained based on the actual voltage value at point B and the mapping relationship.

[0048] In some embodiments, such as Figure 4 As shown, Figure 4This is a schematic diagram of another embodiment of the junction box and position detection mechanism of this application. The position information in this embodiment includes deformation information. The rotating bracket 31 includes a deformation strip 312 that extends and winds along the winding direction x of the cable body 20. The junction box 10 is provided with a fixing post 11. The center section of the deformation strip 312 is fixedly connected to the fixing post 11. The winding end of the deformation strip 312 is stretched or compressed as the cable body 20 extends and retracts. The detection component 32 includes a deformation detection element 322, which is disposed on the deformation strip 312 and configured to acquire the deformation information of the deformation strip 312. The deformation detection element 322 is electrically connected to the power adjustment mechanism 40. The power adjustment mechanism 40 determines the extension length of the cable body 20 relative to the junction box 10 based on the deformation information.

[0049] The center section of the deformation strip 312 is fixedly installed with the wire box 10. The other end of the deformation strip 312, namely the winding end, is stretched or compressed as the wire body 20 expands and contracts. This deformation can characterize the stretching or compression of the deformation strip 312, thereby characterizing the stretching or compression of the wire body 20.

[0050] The deformation strip 312 can be an elastic element such as a spring. When the cable 20 is returned to its retracted state, the contraction force of the central section of the spring is minimal. As the cable 20 extends or retracts by different lengths, the force on the central section of the spring also varies. The rule is that the longer the extension length of the cable 20, the greater the force on the central section of the spring, and the greater the deformation. Therefore, the extension length of the cable 20 relative to the cable box 10 can be determined by the deformation of the central section of the spring. When the extension length of the cable 20 is different, the deformation information of the deformation detection element 322 is also different. The mapping relationship between the two can be obtained. In actual use, the extension length of the cable 20 relative to the cable box 10 can be obtained based on the actual deformation information of the deformation detection element 322 and this mapping relationship.

[0051] In some embodiments, such as Figure 4 As shown, the deformation information includes pressure information; the deformation detection element 322 includes a pressure sensor (not shown in the figure), which is disposed between the fixed column 11 and the center section and configured to acquire the pressure information of the center section; the pressure sensor is electrically connected to the power adjustment mechanism 40, which determines the extension length of the wire 20 relative to the wire box 10 based on the pressure information.

[0052] In one embodiment, when the cable 20 is returned to its retracted state, the contraction force of the central segment of the spring is minimal. As the cable 20 extends or retracts by different lengths, the force on the central segment of the spring also varies. The general rule is that the longer the cable 20 is extended, the greater the force on the central segment of the spring, and the greater the interaction force between the central segment and the fixing post 11. Based on this, a pressure sensor can be placed between the central segment of the spring and the fixing post 11 to sense pressure and convert the pressure information into a voltage signal, thereby determining the extension length of the cable 20 relative to the cable box 10.

[0053] When the extension length of the cable 20 is different, the pressure information of the pressure sensor is also different. The mapping relationship between the two can be obtained. In actual use, the extension length of the cable 20 relative to the cable box 10 can be obtained based on the actual pressure information of the pressure sensor and this mapping relationship.

[0054] In some embodiments, deformation detection can also be obtained through the relative positional relationship between a preset position point on the deformation strip 312 and a preset position point on the wire box 10.

[0055] In some embodiments, such as Figure 5 As shown, Figure 5 This is a schematic diagram of a rotating bracket embodiment of the present application. The rotating bracket 31 is provided with a preset detection point 313. The detection component 32 is configured to obtain the position information of the preset detection point 313 as the position information of the line body 20.

[0056] When the cable body 20 extends or retracts, it will cause the rotating bracket 31 to rotate. The relative positional relationship between the preset detection point 313 on the rotating bracket 31 and the cable box 10 will change. Since the rotating bracket 31 and the cable body 20 rotate synchronously, the positional information of the preset detection point 313 on the rotating bracket 31 can be used as the positional information of the cable body 20.

[0057] In some embodiments, such as Figure 5 and Figure 6 As shown, the detection component includes a signal generating component (not shown) mounted on the rotating bracket 31 and multiple switches S fixedly mounted relative to the cable box 10. The preset detection point 313 includes multiple (two or more) locking points, such as locking point a, locking point b, locking point c, and locking point d. The signal generating component provides detection signals to the multiple locking points respectively. The multiple switches S are configured to correspond one-to-one with the multiple locking points. The switches S are electrically connected to the power adjustment mechanism 40 and the corresponding locking points respectively. The locking points are configured to lock the cable body 20 when it rotates to the corresponding switch S as the cable body 20 extends, and close the corresponding switch S so that the power adjustment mechanism 40 receives the corresponding detection signal. When locking the cable body 20, the extension length of the cable body 20 relative to the cable box 20 is different for different locking points or different combinations of locking points. The power adjustment mechanism 40 determines the extension length of the cable body 20 relative to the cable box 10 based on the detection signal of the locking point.

[0058] The positions of locking points a, b, c, and d can be adjusted according to actual needs, allowing the cable 20 to be locked by different locking points or different combinations of locking points at different extension lengths. This closes different switches S or different combinations of switches, resulting in the power adjustment mechanism 40 receiving different detection signals or different combinations of detection signals. Alternatively, the power adjustment mechanism 10 can obtain detection signals from different pins connected to different switches S, or different combinations of pins. The power adjustment mechanism 40 can determine the extension length of the cable 20 based on these detection signals.

[0059] Therefore, when the extension length of the cable 20 is different, the power adjustment mechanism 40 can obtain the detection signal corresponding to at least one of the locking points a, b, c, and d, and can obtain the mapping relationship between the two. In actual use, the extension length of the cable 20 relative to the cable box 10 can be obtained based on the actual detection signals or combinations and the mapping relationship.

[0060] In some embodiments, in order to improve the accuracy of detection, the power adjustment mechanism 40 can comprehensively determine the locking state of the checkpoint based on multiple detection results within a preset time period, or determine the locking state as a valid state after the duration of the locking state of the checkpoint, that is, the duration of the continuous output of the detection signal, is longer than the preset time period, that is, the detection signal is a valid signal. The power adjustment mechanism 40 determines the extension state of the cable 20 relative to the cable box 10 based on the valid locking state or the valid detection signal.

[0061] In some embodiments, such as Figure 7 As shown, Figure 7 This is a schematic diagram of another embodiment of the junction box and position detection mechanism of this application. The position information includes sensing information. The rotating bracket 31 is movably connected inside the junction box 10. The detection component 32 includes a first sensing element 314 and a second sensing element 315. One of the first sensing element 314 and the second sensing element 315 is fixedly disposed relative to the junction box 10, and the other is disposed at a preset detection point. The second sensing element is electrically connected to the power adjustment mechanism 40. The power adjustment mechanism 40 determines the extension length of the cable 20 relative to the junction box 10 based on the sensing information of the second sensing element 315.

[0062] One of the first sensing element 314 and the second sensing element 315 can be disposed on the junction box 10, or it can be disposed on other components or parts fixedly disposed on the junction box 10, and the coupling signal between the first sensing element 314 and the second sensing element 315 can be transmitted through the through hole on the junction box 10.

[0063] The non-contact arrangement of the first sensing element 314 and the second sensing element 315 reduces structural complexity. When the distance between the first sensing element 314 and the second sensing element 315 is less than a distance threshold or the deflection angle is less than an angle threshold, the first sensing element 314 and the second sensing element 315 will couple signals, thereby enabling the second sensing element 315 to sense the first sensing element 314 and generate sensing information. The sensing information is fed back to the power adjustment mechanism 40 in the form of a voltage signal. The power adjustment mechanism 40 determines the relative position information between the first sensing element 314 and the second sensing element 315 based on the voltage signal, thereby determining the position information of the cable 20 and the extension length of the cable 20 relative to the cable box 10.

[0064] In some embodiments, the sensing information includes optical information. The first sensing element 314 includes a light emitter (not shown), and the second sensing element 315 includes a light receiver (not shown). The power adjustment mechanism 40 determines the extension length of the cable 20 relative to the cable box 10 based on the optical information from the light receiver. This embodiment uses photoelectric sensors, namely light emitters and light receivers, to realize the detection component 32. The structure is simple, and it can achieve non-contact detection with less interference and high accuracy.

[0065] In some embodiments, multiple light receivers can be set on the rotating bracket 31, and the installation position of each light receiver corresponds to the extension length of the line body 20. The light emitter can be set on the box 10. When the line body 20 extends or retracts, it will rotate the rotating bracket 31, and the rotating bracket 31 will rotate the light receiver. When a certain light receiver rotates to be aligned with the light emitter, the light receiver can output a voltage signal corresponding to the light information.

[0066] When the extension length of the line body 20 is different, different optical receivers receive the optical signals from the optical transmitters. The mapping relationship between the numbering information of the optical receivers and the extension length of the line body 20 can be obtained. In actual use, the extension length of the line body 20 relative to the wire box 10 can be obtained based on the voltage signal and numbering information of the optical receivers and this mapping relationship.

[0067] In some embodiments, light emitters can be set at multiple preset detection points on the rotating bracket 31, and a light connector can be set on the wire box 10. The detection of the extension length of the wire 20 is similar to that in the above embodiments, and will not be described in detail here.

[0068] In some embodiments, a light receiver and a light emitter are disposed opposite to each other on the junction box 10, and multiple blocking elements (not shown) are disposed at different preset detection points on the rotating bracket 31. The dimensions of the different blocking elements are different along the rotation direction x. Therefore, when the light receiver and the light emitter pass between different preset detection points, the corresponding blocking element will block the light between them. The blocking time of the different blocking elements is different. In this way, the relative position information between the blocking element and the junction box 10 can be obtained, thereby obtaining the relative position information between the rotating bracket 31 and the junction box 10, and then obtaining the extension length of the cable 20 relative to the junction box 10.

[0069] In some embodiments, the sensing information includes magnetic information, the second sensing element 315 includes a magnetic element (not shown), the first sensing element 314 includes a magnetic sensing element (not shown), and the power adjustment mechanism 40 determines the extension length of the cable 20 relative to the cable box 10 based on the magnetic information of the magnetic sensing element.

[0070] The magnetic sensing element can be a Hall effect sensor or the like. Magnetic elements such as magnets can be set at multiple preset detection points on the rotating bracket 31, and a Hall effect sensor can be set on the wire box 10. When the wire 20 extends or retracts, it will rotate the rotating bracket 31, which in turn will rotate the magnetic elements. When a certain magnetic element rotates close to the Hall effect sensor, the Hall effect sensor can output a voltage signal corresponding to the magnetic sensing information. The detection of the extension length of the wire 20 is similar to that in the above embodiment and will not be described in detail here.

[0071] The charging device proposed in this application includes a cable box, a cable, a position detection mechanism, and a power adjustment mechanism. The cable is at least partially installed inside the cable box, and at least one end of the cable is retractable relative to the cable box to adjust the extension length of the cable relative to the cable box. The position detection mechanism is at least partially disposed in the cable box and configured to acquire the position information of the cable. The power adjustment mechanism is electrically connected to the position detection mechanism and the cable, and configured to determine the extension length of the cable relative to the cable box based on the position information, and control the output power of the cable based on the extension length. In this way, this application can utilize the position detection mechanism to acquire the position information of the cable, and use the power adjustment mechanism to determine the extension length of the cable relative to the cable box based on the position information, and adjust the output power of the cable based on the extension length. This allows for the allocation of different output power when the cable is at different extension lengths. For example, the longer the extension length of the cable, the longer the length of the cable outside the cable box, and the shorter the length inside the cable box. This results in less cable loss inside the cable box and a lower temperature inside the cable box. In this case, a larger output power can be allocated to the cable to increase the output power of the charging device without causing problems such as excessive temperature or excessive loss. Therefore, this application can adjust the output power of the cable according to the extension length of the cable, thereby increasing the output power while ensuring heat dissipation performance, etc.

[0072] This application achieves the detection of the cable extension length through the above methods. A longer extension length results in a shorter cable length inside the charging device, leading to less heat generation and reduced total power loss. This is equivalent to enabling higher power output, thus increasing the overall power of the charger. The cable extension / retraction status is used as an input condition. Software detects the current voltage signal (all detection methods ultimately need to be converted into voltage signals to be read by components such as the power regulator in the microprocessor unit) and updates the corresponding output power of the cable in real time. For example, in a charger originally designed for 50W, the worst-case scenario is when the cable (the retractable part) is completely retracted inside the charger and power is output through the cable. All cable losses occur within the charger. The optimal state is when the cable (the extendable part) is fully extended, still outputting 50W. Since cable losses within the charger are minimal, almost zero, the overall power loss is significantly reduced. In this case, the actual total output power of the cable can be increased to balance the overall power loss, allowing the cable to output up to 70W. In the intermediate state between these two extreme states, the actual output power of the cable increases with the increase of the exposed length of the cable. For example, the actual output power is 55W for one exposed turn, 60W for two exposed turns, and so on.

[0073] The charging device described in this application is not limited to chargers; it is applicable to devices that support power transmission, such as power strips and hubs with retractable cables. This application maximizes the output power of the charging device within its current size by matching the cable extension length with the corresponding output power, thereby increasing its power density.

[0074] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A charging device, characterized by, The charging device comprises: a wire box; a wire body, at least partially arranged in the wire box, at least one end of the wire body being retractable relative to the wire box to adjust the extension length of the wire body relative to the wire box; a position detection mechanism, at least partially arranged in the wire box, configured to obtain position information of the wire body; a power adjustment mechanism, electrically connected with the position detection mechanism and the wire body, configured to determine the extension length of the wire body relative to the wire box based on the position information, and control the output power of the wire body based on the extension length.

2. The charging device according to claim 1, characterized in that, The position detection mechanism comprises: a rotating support, at least partially movably connected in the wire box, and the wire body being arranged around the rotating support, so that when at least one end of the wire body is retracted relative to the wire box, the rotating support is rotated; a detection assembly, configured to obtain position information of the rotating support as the position information of the wire body.

3. The charging device according to claim 2, characterized in that, The position information comprises voltage value information, the rotating support comprises a conductive strip wound and extended along the winding direction x of the wire body, the conductive strip rotates with the retraction of the wire body, and both ends of the conductive strip are configured to form a preset voltage difference; The detection assembly comprises an electric detection member fixedly arranged in the wire box, the electric detection member is slidably electrically connected with the conductive strip, and is electrically connected with the power adjustment mechanism; the power adjustment mechanism determines the extension length of the wire body relative to the wire box based on the voltage value information output by the electric detection member.

4. The charging apparatus according to claim 2, characterized by, The position information comprises deformation information, and the rotating support comprises a deformation strip wound and extended along the winding direction of the wire body; The wire box is provided with a fixed column, a center segment of the deformation strip is fixedly connected with the fixed column, and the winding end of the deformation strip deforms with the retraction of the wire body; The detection assembly comprises a deformation detection member arranged in the deformation strip, configured to obtain deformation information of the deformation strip; the deformation detection member is electrically connected with the power adjustment mechanism, and the power adjustment mechanism determines the extension length of the wire body relative to the wire box based on the deformation information.

5. The charging apparatus according to claim 4, characterized by, The deformation information comprises pressure information; the deformation detection member comprises a pressure sensor arranged between the fixed column and the center segment, configured to obtain pressure information of the center segment; the pressure sensor is electrically connected with the power adjustment mechanism, and the power adjustment mechanism determines the extension length of the wire body relative to the wire box based on the pressure information.

6. The charging apparatus according to claim 2, wherein The rotating support is provided with a preset detection point, and the detection assembly is configured to obtain position information of the preset detection point as the position information of the wire body.

7. The charging apparatus according to claim 6, characterized by, The detection assembly comprises a signal generating assembly arranged on the rotating support and a plurality of switches fixedly arranged relative to the wire box, the preset detection point comprises a plurality of clamping points, the clamping points are electrically connected with the signal generating assembly, the signal generating assembly respectively provides detection signals for the plurality of clamping points, the plurality of switches are arranged one by one corresponding to the plurality of clamping points, and the switches are respectively electrically connected with the power adjustment mechanism and the corresponding clamping points. The clamping points are configured to lock the wire body when the wire body is extended or retracted to the corresponding switch, and the corresponding switch is closed, so that the power adjusting mechanism receives the corresponding detection signal; the wire body has different extension lengths relative to the wire box when different clamping points or different combinations of clamping points lock the wire body; The power adjusting mechanism determines the extension length of the wire body relative to the wire box based on the detection signal of the clamping point.

8. The charging apparatus according to claim 6, characterized by, The position information includes sensing information, and the rotating support is movably connected to the wire box; The detection assembly includes a first sensing member and a second sensing member, one of the first sensing member and the second sensing member is fixedly arranged relative to the wire box, and the other is arranged at the preset detection point; The second sensing member is electrically connected to the power adjusting mechanism, and the power adjusting mechanism determines the extension length of the wire body relative to the wire box based on the sensing information of the second sensing member.

9. The charging apparatus according to claim 8, characterized by, The sensing information includes light information, the first sensing member includes a light emitting member, the second sensing member includes a light receiving member, and the power adjusting mechanism determines the extension length of the wire body relative to the wire box based on the light information of the light receiving member.

10. The charging apparatus according to claim 8, characterized by, The sensing information includes magnetic sensing information, the first sensing member includes a magnetic sensing member, the second sensing member includes a magnetic member, and the power adjusting mechanism determines the extension length of the wire body relative to the wire box based on the magnetic sensing information of the magnetic sensing member.

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