USB power supply device of portable electronic equipment

Abstract

The invention discloses a USB power supply device of portable electronic equipment. The USB power supply device comprises a heat dissipation structure arranged between a shell A and a battery. The heat dissipation structure comprises a heat conduction plate A, a heat conduction plate B, a plurality of groups of fins A, a plurality of fins B and a transmission structure; the heat conducting plate A is fixedly arranged on the battery, the heat conducting plate B is transversely and slidably arranged on the side, facing the shell A, of the heat conducting plate A, and the transmission structure is connected with the heat conducting plate B and used for driving the heat conducting plate B to transversely slide under the action of external force; the plurality of groups of fins A are fixedly arranged on the heat conducting plate B, the shell A is provided with a plurality of holes corresponding to the positions of the fins B, the plurality of fins B are respectively arranged in the plurality of holes in a penetrating manner, and the transverse sliding of the heat conducting plate B is converted into the movement of the fins B vertical to the transverse direction through the motion conversion assembly, so that the fins B extend out of or retract back from the holes. The heat dissipation device has the advantages that heat dissipation is adjusted according to heat dissipation requirements, the heat dissipation effect is enhanced, and the carrying convenience is not affected.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology, specifically to a USB power supply device for portable electronic devices. Background Technology

[0002] USB Power Delivery has become one of the core features of modern portable electronic devices. Essentially, it provides power to a computer system or motherboard via a USB interface. This technology is primarily used in ultra-low power, highly integrated, or special-purpose computing devices, and is particularly prominent in mobile terminals such as tablets.

[0003] In a typical USB-powered tablet, the entire system is highly integrated onto a compact motherboard, including core components such as the CPU, memory, and storage. These devices are typically powered by a power bank (portable charger) combined with a USB cable, demonstrating a high degree of flexibility and convenience in power supply.

[0004] For USB-powered tablets, when a power bank supplies power, the process is essentially an energy conversion process. This conversion inevitably involves energy loss, which is dissipated as heat. The high current during fast charging exacerbates this heat generation, and the power bank's casing is the primary source of heat dissipation during this process. To enhance heat dissipation, increasing the surface area for heat dissipation is a common approach. Some DIY power banks add heat dissipation fins to their casings. While adding fins improves heat dissipation, portability is a crucial factor for power banks, a key consideration when choosing one for travel. DIY power banks require the user to add fins after purchase, which is cumbersome. Furthermore, the added fins can make the casing uneven, causing discomfort and making it difficult to hold the power bank comfortably. This significantly reduces portability in terms of grip.

[0005] In view of this, we propose a USB power supply device for portable electronic devices. Summary of the Invention

[0006] The purpose of this invention is to provide a USB power supply device for portable electronic devices to resolve the traditional contradiction between "effective heat dissipation" and "convenient portability," providing users with a mobile power solution that offers a superior experience without compromise. This solution ensures safe heat dissipation during high-performance operation while also providing convenience and comfort for carrying around and daily use.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a USB power supply device for a portable electronic device, comprising a heat dissipation structure disposed between the outer casing A and the battery; The heat dissipation structure includes a heat-conducting plate A, a heat-conducting plate B, multiple sets of fins A, multiple fins B, and a transmission structure. The heat-conducting plate A is fixedly mounted on the battery, and the heat-conducting plate B is laterally slidable on the side of the heat-conducting plate A facing the outer shell A. The transmission structure is connected to the heat-conducting plate B and is used to drive the heat-conducting plate B to slide laterally under the action of external force. Multiple sets of fins A are fixed on the heat-conducting plate B. Multiple holes corresponding to the positions of the fins B are opened on the outer shell A. Multiple fins B are respectively inserted into multiple holes. The lateral sliding of the heat-conducting plate B is converted into the lateral movement of the fins B by the motion conversion component, so that the fins B extend or retract from the holes. In non-working state: Multiple fins B retract synchronously into the power bank housing and seal multiple holes; thus making the heat dissipation structure flush with the outer shell for easy portability; Operating state: Multiple fins B extend synchronously from inside the power bank outward along multiple holes, forming an extended heat dissipation layer on the outside of the power bank housing.

[0008] Preferably, each group of fins A has two fins, with a single fin B disposed between the two fins A. The fin B slides with the fin A. A guide groove is provided on the fin A that is inclined relative to the lateral direction. A guide protrusion is fixed on the fin B. The guide protrusion moves along the guide groove. The guide protrusion and the guide groove cooperate to form a motion conversion component that converts the lateral sliding of the heat-conducting plate B into the lateral movement of the fin B.

[0009] Preferably, the heat-conducting plate A has multiple sliding grooves on the side facing the outer shell A, and the side of the heat-conducting plate B that contacts the heat-conducting plate A has multiple sliding strips fixed thereon, with each sliding strip corresponding to and slidingly engaging with the multiple sliding grooves.

[0010] Preferably, the sliding bar has a fan-shaped cross-section, and the groove has a fan-shaped cross-section that matches the sliding bar.

[0011] Preferably, the heat-conducting plate A has two limiting structures arranged laterally on the side facing the outer shell A; The limiting structure includes an elastic retaining strip and a limiting strip; The elastic clip is fixedly mounted on the heat-conducting plate A and is L-shaped. The gap of the elastic clip is inserted into the side end of the heat-conducting plate B. The limiting strip is fixedly mounted on the inner side of the transverse section of the elastic clip. Two slots are opened transversely on the side of the heat-conducting plate B away from the heat-conducting plate A. The limiting strip and the slots are selectively engaged to lock the position of the heat-conducting plate B in the non-working state or the working state.

[0012] Preferably, the transmission structure includes a fixed block, a connecting rod A, and a connecting rod B; The fixing block is fixed on the side of the heat-conducting plate B away from the heat-conducting plate A. The connecting rod A is fixed on the fixing block. The fixing block and the connecting rod A are housed inside the power supply housing. The connecting rod B passes through the side end of the power supply housing. One end of the connecting rod B is detachably connected to the connecting rod A. The other end of the connecting rod B is fixed with a handle located outside the power supply housing.

[0013] Preferably, one end of the connecting rod A is provided with a slot, and one end of the connecting rod B is inserted into the slot. The connecting rod A corresponding to the slot has multiple abutment grooves arranged in a ring array on its circumference, and one end of the connecting rod B has multiple grooves arranged in a ring array. Each groove is provided with a spring piece. One end of the connecting rod B is inserted into the slot, and the spring is squeezed and then springs back to abut against the abutment groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In this application, by setting a heat dissipation structure, multiple fins B in the non-working state synchronously retract into the power bank housing and seal multiple holes; thus, the heat dissipation structure is flush with the outer shell, making it easy to carry; in the working state, multiple fins B synchronously extend from inside the power bank outward along multiple holes, forming an extended heat dissipation layer on the outside of the power bank housing. This allows for rapid switching between non-working and working states depending on the usage scenario.

[0015] In this application, the guide protrusion and guide groove cooperate to form a motion conversion component that converts the lateral sliding of the heat-conducting plate B into the perpendicular lateral movement of the fin B. This is simple, efficient, and not easily damaged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the usage state of the present invention; Figure 2 This is a schematic diagram of the non-working state structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention in its non-working state; Figure 4 This is a schematic diagram of the internal structure of the present invention in its working state; Figure 5 This is a schematic diagram of the exploded structure of the mobile power supply of the present invention; Figure 6 This is an exploded view of the heat dissipation structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between heat-conducting plate A and heat-conducting plate B of the present invention; Figure 8 This is a schematic diagram of the heat-conducting plate A structure of the present invention; Figure 9 This is a schematic diagram of the heat-conducting plate B structure of the present invention; Figure 10 This is a schematic diagram of the limiting structure of the present invention; Figure 11 This is an exploded view of the connection structure between fin A and fin B of the present invention; Figure 12 This is a schematic diagram showing the changes in fin B according to the present invention; Figure 13 This is a schematic diagram of the transmission structure of the present invention; Figure 14 This is a schematic diagram showing a cross-sectional change of the transmission structure of the present invention.

[0017] In the diagram: 100, Outer shell A; 200, Outer shell B; 300, End cap A; 400, Bracket; 500, Control module; 600, Heat dissipation structure; 700, End cap B; 800, Battery; 101. Hole; 601. Heat-conducting plate A; 602. Heat-conducting plate B; 603. Fin A; 604. Fin B; 605. Transmission structure; 606. Limiting structure; 6011, Slide groove; 6021, Card slot; 6022, Sliding bar; 6031, guide groove; 6041, Guide protrusion; 6051, Fixing block; 6052, Pull handle; 6053, Connecting rod A; 6054, Connecting rod B; 6055, Spring piece; 60531, slot; 60532, abutment slot; 60541, Groove; 6061, Elastic retaining strip; 6062, Limiting strip. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A USB power supply device for a portable electronic device, please refer to Figure 1 and Figure 5The power bank casing includes outer shell A100, outer shell B200, end cap A300, and end cap B700. A bracket 400 is installed inside the power bank casing, and a control module 500 and a battery 800 are mounted on the bracket 400. The control module 500 includes a main control chip (MCU), a DC-DC converter, a battery management and protection system (BMS), and a protocol identification chip (Protocol IC), etc., and these components are mounted on a PCB board.

[0020] The control module 500 and battery 800 are sequentially mounted on the bracket 400 and connected by wires. The bracket 400 with the control module 500 and battery 800 mounted is installed inside the housing B200, and the housing A100 is covered and fixed at the housing B200. The housing A100 and housing B200 form a complete shell. The end caps A300 and B700 are respectively snapped onto the closed ends of the housing A100 and housing B200. The socket on the end cap A300 corresponds to the connector on the control module 500.

[0021] Power bank workflow: Charging process (input): The charger is inserted, the protocol chip identifies the charger's capabilities and negotiates the voltage / current, the main control MCU starts up, the buck-boost circuit operates in buck mode, the BMS circuit monitors the status of battery 800, the battery 800 is charged in constant current / constant voltage mode, the power indicator light changes, and the charging process automatically stops when fully charged. Discharge process (output): Press the power button, the main control MCU starts, insert a tablet computer or other device, the protocol chip recognizes the device and negotiates the best output scheme, the main control MCU controls the buck-boost circuit to work in boost mode, outputs the required voltage and current, the BMS monitors the battery status throughout the process, alarms when the battery is low, and automatically shuts down.

[0022] Please see Figure 5 and Figure 6 It also includes a heat dissipation structure 600 located between the outer casing A100 and the battery 800; the heat dissipation structure 600 includes a heat-conducting plate A601, a heat-conducting plate B602, multiple sets of fins A603, multiple fins B604 and a transmission structure 605; the heat-conducting plate A601, the heat-conducting plate B602, the fins A603 and the fins B604 can all be made of aluminum alloy, which is low in cost, light in weight and easy to process.

[0023] A heat-conducting plate A601 is fixedly mounted on the wide side of the battery 800. This wide side has the largest surface area, maximizing the contact area with the heat-conducting plate A601 and thus maximizing heat conduction. A heat-conducting plate B602 is laterally slidable on the side of the heat-conducting plate A601 facing the outer casing A100. While the heat-conducting plate B602 is movable relative to the heat-conducting plate A601, heat can be transferred between them. A transmission structure 605 is connected to the heat-conducting plate B602 and is used to drive the heat-conducting plate B602 to slide laterally under external force.

[0024] In this embodiment, the transmission structure 605 is located in the middle of the heat-conducting plate B602, and the heat-conducting plate B602 is subjected to uniform force when it is moved.

[0025] In this embodiment, please refer to Figures 7 to 9 The heat-conducting plate A601 has multiple sliding grooves 6011 on the side facing the outer casing A100. Multiple sliding strips 6022 are fixed to the side of the heat-conducting plate B602 that contacts the heat-conducting plate A601. Each sliding strip 6022 corresponds to and slides in conjunction with one of the multiple sliding grooves 6011. The sliding strips 6022 can be made of aluminum alloy and serve a heat-conducting function.

[0026] In this embodiment, please refer to Figure 8 and Figure 9 The sliding bar 6022 has a fan-shaped cross-section, and the sliding groove 6011 has a fan-shaped cross-section that matches the sliding bar 6022. When the heat-conducting plate B602 moves relative to the heat-conducting plate A601, the sliding bar 6022 slides along the sliding groove 6011, ensuring that the heat-conducting plate B602 moves stably relative to the heat-conducting plate A601, and the heat-conducting plate B602 and the heat-conducting plate A601 are always in close contact to achieve the heat conduction effect.

[0027] Multiple sets of fins A603 are fixedly mounted on the wide surface of the heat-conducting plate B602. The wide surface of the heat-conducting plate B602 has the largest surface area, allowing for the arrangement of more fins A603. The outer casing A100 has multiple holes 101 corresponding to the positions of the fins B604. Multiple fins B604 are respectively inserted into the holes 101. The lateral sliding of the heat-conducting plate B602 is converted into the lateral movement of the fins B604 by a motion conversion component, thereby causing the fins B604 to extend or retract from the holes 101.

[0028] In this embodiment, please refer to Figure 11 and Figure 12Each set of fins A603 has two fins, and a single fin B604 is located between the two fins A603. The fin B604 slides with the fin A603. The fin A603 has a guide groove 6031 that is inclined relative to the lateral direction. The fin B604 has a guide protrusion 6041 fixed on it. The guide protrusion 6041 moves along the guide groove 6031. The guide protrusion 6041 and the guide groove 6031 cooperate to form a motion conversion component that converts the lateral sliding of the heat conduction plate B602 into the lateral movement of the fin B604. When the transmission structure 605 is activated by an outward pulling force, the heat-conducting plate B602 moves relative to the heat-conducting plate A601, and the fin A603 moves with the heat-conducting plate B602. Because a portion of the fin B604 is always located within the hole 101 and thus restricted by it, the fin B604 does not move with the fin A603. To counteract the lateral force, the inclined guide groove 6031 pushes the guide protrusion 6041 along the inclined direction during movement, causing the fin B604 to extend out of the hole 101. Similarly, when the transmission structure 605 is subjected to a pushing force, the heat-conducting plate B602 moves in the opposite direction relative to the heat-conducting plate A601, the fin A603 moves in the opposite direction with the heat-conducting plate B602, the guide protrusion 6041 moves back along the inclined guide groove 6031, and the fin B604 retracts from the hole 101.

[0029] Force and motion analysis during the extension of fin B604: (1) Input motion: external force By acting on the heat-conducting plate B602, the driving fin A603 moves to the right along the X direction.

[0030] (2) Constraint reaction: Fin B604 is constrained by the wall of hole 101 in the X direction, so its lateral movement is restricted. Therefore, when fin A603 moves to the right relative to fin B604 in the X direction, the left inclined surface of guide groove 6031 comes into contact with guide protrusion 6041 and generates an interaction force.

[0031] (3) Force decomposition: The left inclined surface of the guide groove 6031 applies a normal force to the guide protrusion 6041. The force is perpendicular to the inclined surface of the guide groove 6031.

[0032] force It can be decomposed into two components: Horizontal component The direction is opposite to the movement direction of the heat-conducting plate B602. This component force is constrained by the horizontal reaction force generated by the wall of hole 101 on the fin B604. Balanced This allows the fin B604 to maintain static balance in the X direction.

[0033] vertical component The direction is perpendicular to the X-axis, that is, upward along the inclined direction of the guide groove 6031. This component force is the effective driving force that pushes the guide protrusion 6041 to move along the inclined direction of the guide groove 6031. When When the frictional force between fin B604 and hole 101 and other resistances are greater than the resistance, fin B604 is driven to extend outward in the Y direction.

[0034] (4) Energy conversion: the work done by the applied pulling force Converted to: 1) Overcoming constraint forces; 2) The work done by pushing fin B604 out to overcome resistance. 3) Overcome the heat generated by friction.

[0035] Guide groove 6031 tilt angle design: In order to drive the fin B604 to extend or retract, the design of the tilt angle θ of the guide groove 6031 must ensure the generation of the vertical component force. It is sufficient to overcome all resistance.

[0036] Normal force acting on guide protrusion 6041 The breakdown is as follows: Horizontal component : ; vertical component : ; The mechanism is in equilibrium when it is in a critical state before it moves; the force balance equation in the vertical direction is: .

[0037] in, It is the friction between fin B604 and the wall of hole 101. It can be any force such as a return spring. Since there is no return spring in this application, it is not necessary to add one.

[0038] The force in the horizontal direction is balanced by the constraint reaction force of the wall of hole 101.

[0039] More importantly, from the perspective of work done, when friction is ignored, the work input equals the work output: ; because The transmission ratio of the motion conversion component can be derived as follows: ; It's the transmission ratio. The larger, The larger the value, the smaller the input force required. Overcome greater resistance .

[0040] But at the same time, The larger the extension, the more it achieves the same amount of extension. Required lateral travel The bigger it is, .

[0041] Therefore, the selection of the angle θ is a design trade-off. The tilt angle θ of the motion conversion component, i.e., the wedge component, in this application is typically chosen as a value that balances mechanical efficiency and stroke. The range is 30° to 45°. The value is approximately 0.58 to 1.0, providing good mechanical efficiency and keeping the operating force at a reasonable level. The stroke ratio is also reasonable, avoiding an overly long structure or an excessively small extension.

[0042] Force and motion analysis of fin B604 during retraction: (1) Input motion: external force Drive the heat-conducting plate B602 and fins A603 to move in the opposite direction along the X direction, that is, to the left.

[0043] (2) Constraint reaction: The X-axis movement of fin B604 is still constrained by hole 101. At this time, the right slope of guide groove 6031 contacts guide protrusion 6041.

[0044] (3) Force decomposition: The left inclined surface of the guide groove 6031 applies a normal force to the guide protrusion 6041. The force is perpendicular to the inclined surface of the guide groove 6031.

[0045] force After decomposition: Horizontal component Similarly constrained by the wall of hole 101 balance.

[0046] vertical component The downward direction becomes the effective driving force for the retraction of fin B604 along the Y direction.

[0047] Please see Figures 2 to 4 In non-working state: multiple fins B604 retract synchronously into the power bank housing and seal multiple holes 101; thus making the heat dissipation structure 600 flush with the outer shell, making it easy to carry; Operating state: Multiple fins B604 extend synchronously from inside the power bank outward along multiple holes 101, forming an extended heat dissipation layer on the outside of the power bank housing.

[0048] Quickly switch between non-working and working states based on the usage scenario.

[0049] In this embodiment, please refer to Figure 7 and Figure 10Two limiting structures 606 are laterally arranged on the side of the heat-conducting plate A601 facing the outer shell A100; The limiting structure 606 includes an elastic retaining strip 6061 and a limiting strip 6062; the elastic retaining strip 6061 and the limiting strip 6062 can be made of a highly elastic aluminum alloy material, which has thermal conductivity and elasticity.

[0050] The elastic clip 6061 is fixedly mounted on the heat-conducting plate A601 in an L-shape. The gap of the elastic clip 6061 is inserted and engaged with the side end of the heat-conducting plate B602. The limiting strip 6062 is fixedly mounted on the inner side of the transverse section of the elastic clip 6061. Two slots 6021 are transversely opened on the side of the heat-conducting plate B602 away from the heat-conducting plate A601. The limiting strip 6062 and the slots 6021 are selectively engaged to lock the position of the heat-conducting plate B602 in the non-working state or the working state. The limiting structure 606 located on the left side of the heat-conducting plate A601 restricts the initial state of the heat-conducting plate B602. At this time, the fins B604 are in a retracted state. After the outer shell A100 and the outer shell B200 are engaged, the protruding end of the fins B604 is inserted into the hole 101, but does not protrude from the hole 101. When the outer shells A100 and B200 are engaged, the protruding end of the fins B604 is directly inserted into the hole 101. The limiting structure 606 located on the right side of the heat-conducting plate A601 restricts the movement of the heat-conducting plate B602. At this time, the fins B604 are in an extended state, and this extended state can be maintained.

[0051] For details, please refer to Figure 13 The transmission structure 605 includes a fixed block 6051, a connecting rod A 6053, and a connecting rod B 6054; A fixing block 6051 is fixedly mounted on the side of the heat-conducting plate B602 opposite to the heat-conducting plate A601. A connecting rod A6053 is fixedly mounted on the fixing block 6051. The fixing block 6051 and the connecting rod A6053 are housed inside the power bank housing. A connecting rod B6054 passes through the side end of the power bank housing. One end of the connecting rod B6054 is detachably connected to the connecting rod A6053, and the other end of the connecting rod B6054 is fixed to a handle 6052 located outside the power bank housing. By applying force to the handle 6052, the connecting rod B6054, the connecting rod A6053, and the fixing block 6051 are moved, thereby moving the heat-conducting plate B602.

[0052] In this embodiment, a portion of the end face of the pull handle 6052 contacts the flat surface of the side end of the outer casing A100, and another portion of the end face contacts the arc surface of the side end of the outer casing A100. The gap between the other portion of the end face of the pull handle 6052 and the arc surface of the side end of the outer casing A100 allows personnel to easily pull the pull handle 6052.

[0053] In this embodiment, please refer to Figure 14One end of the connecting rod A6053 has a slot 60531, and one end of the connecting rod B6054 is inserted into the slot 60531. The connecting rod A6053 corresponding to the slot 60531 has multiple abutment grooves 60532 arranged in a ring on its circumference. One end of the connecting rod B6054 has multiple grooves 60541 arranged in a ring on its circumference. Each groove 60541 is provided with a spring piece 6055. When one end of the connecting rod B6054 is inserted into the slot 60531, the spring piece 6055 is pressed and then rebounds to abut against the abutment groove 60532. After the outer casing A100 and outer casing B200 are engaged, the connecting rod B6054 can be inserted from the outside to align with the connecting rod A6053. The spring piece 6055 enters the slot 60531 and is then pressed into the groove 60541. Once one end of the connecting rod B6054 is fully inserted into the slot 60531, if the spring piece 6055 does not correspond to the abutment groove 60532, the pull handle 6052 is rotated. The connecting rod B6054 and the spring piece 6055 rotate until the spring piece 6055 corresponds to the abutment groove 60532 and quickly springs into the abutment groove 60532 for positioning and fixation, facilitating installation.

[0054] Working principle: When the power bank is not in operation, the left side of the heat-conducting plate B602 makes contact with the elastic retaining strip 6061 located on the left side of the heat-conducting plate A601. At this time, the corresponding limiting strip 6062 abuts against the retaining groove 6021 on the left side of the heat-conducting plate B602, and the heat-conducting plate B602 is positioned in the initial position. At this time, the fins B604 are in the retracted state, the hole 101 is in the blocked state, and there are no protruding parts on the surface of the outer shell A100 and the outer shell B200, so they can be held directly.

[0055] When the power bank is needed, pull the handle 6052 outward. Applying force to the handle 6052 moves the connecting rod B6054, connecting rod A6053, and fixing block 6051, thereby moving the heat-conducting plate B602 laterally to the right. The limiting strip 6062 on the left side of the heat-conducting plate A601 is forced out of the corresponding slot 6021, and the sliding strip 6022 slides along the groove 6011. Simultaneously, the fin A603 moves with the heat-conducting plate B602. Because part of the fin B604 is always located within the hole 101 and is restricted by it, the fin B604 does not move with the fin A603. To counteract the lateral force, the inclined guide groove 6031 pushes the guide protrusion 6041 to move in the inclined direction during movement, causing the fin B604 to extend out of the hole 101. Until the right side of the heat-conducting plate B602 comes into contact with the gap of the elastic retaining strip 6061 located on the right side of the heat-conducting plate A601, the corresponding limiting strip 6062 abuts against the retaining groove 6021 on the right side of the heat-conducting plate B602, positioning the heat-conducting plate B602 and keeping the fins B604 in the extended state for heat dissipation.

[0056] When the power bank is powered off, the handle 6052 is pushed back, the heat-conducting plate B602 moves to the left relative to the heat-conducting plate A601 to the initial position, the fin A603 moves to the left along with the heat-conducting plate B602, the guide protrusion 6041 moves back along the inclined guide groove 6031, the fin B604 retracts from the hole 101, and the power bank returns to the non-working state.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A USB power supply device for a portable electronic device, characterized in that: Includes a heat dissipation structure (600) disposed between the housing A (100) and the battery (800); The heat dissipation structure (600) includes a heat-conducting plate A (601), a heat-conducting plate B (602), multiple sets of fins A (603), multiple fins B (604), and a transmission structure (605). The heat-conducting plate A (601) is fixed on the battery (800), and the heat-conducting plate B (602) is slidably disposed on the side of the heat-conducting plate A (601) facing the outer shell A (100). The transmission structure (605) is connected to the heat-conducting plate B (602) and is used to drive the heat-conducting plate B (602) to slide laterally under the action of external force. Multiple sets of fins A (603) are fixed on the heat-conducting plate B (602). Multiple holes (101) corresponding to the positions of fins B (604) are opened on the outer shell A (100). Multiple fins B (604) are respectively inserted into multiple holes (101). The lateral sliding of the heat-conducting plate B (602) is converted into the lateral movement of fins B (604) by the motion conversion component, so that fins B (604) extend or retract from the holes (101). Non-working state: Multiple fins B (604) retract synchronously into the mobile power supply housing and close multiple holes (101). Operating state: Multiple fins B (604) extend outward from inside the power supply housing along multiple holes (101) and form an extended heat dissipation layer on the outside of the power supply housing.

2. The USB power supply device for a portable electronic device according to claim 1, characterized in that: Each group of fins A (603) has two fins, and a single fin B (604) is located between the two fins A (603). Fin B (604) is slidably engaged with fin A (603). Fin A (603) has a guide groove (6031) that is inclined relative to the lateral direction. Fin B (604) has a guide protrusion (6041) fixed on it. The guide protrusion (6041) moves along the guide groove (6031). The guide protrusion (6041) and the guide groove (6031) cooperate to form a motion conversion component that converts the lateral sliding of the heat-conducting plate B (602) into the lateral movement of fin B (604).

3. The USB power supply device for a portable electronic device according to claim 2, characterized in that: The heat-conducting plate A (601) has multiple grooves (6011) on the side facing the outer shell A (100), and multiple sliding strips (6022) are fixed on the side of the heat-conducting plate B (602) that contacts the heat-conducting plate A (601). The multiple sliding strips (6022) correspond one-to-one with the multiple grooves (6011) and slide together.

4. The USB power supply device for a portable electronic device according to claim 3, characterized in that: The sliding bar (6022) has a fan-shaped cross section, and the sliding groove (6011) has a fan-shaped cross section that is compatible with the sliding bar (6022).

5. A USB power supply device for a portable electronic device according to claim 1, characterized in that: The heat-conducting plate A (601) has two limiting structures (606) arranged laterally on the side facing the outer shell A (100). The limiting structure (606) includes an elastic retaining strip (6061) and a limiting strip (6062). The elastic clip (6061) is fixedly mounted on the heat-conducting plate A (601) and is L-shaped. The gap of the elastic clip (6061) is inserted and engaged with the side end of the heat-conducting plate B (602). The limiting strip (6062) is fixedly mounted on the inner side of the transverse section of the elastic clip (6061). Two slots (6021) are opened transversely on the side of the heat-conducting plate B (602) away from the heat-conducting plate A (601). The limiting strip (6062) and the slots (6021) are selectively engaged to lock the position of the heat-conducting plate B (602) in the non-working state or the working state.

6. A USB power supply device for a portable electronic device according to claim 5, characterized in that: The transmission structure (605) includes a fixed block (6051), a connecting rod A (6053), and a connecting rod B (6054). The fixing block (6051) is fixedly installed on the side of the heat-conducting plate B (602) away from the heat-conducting plate A (601). The connecting rod A (6053) is fixedly installed on the fixing block (6051). The fixing block (6051) and the connecting rod A (6053) are housed in the power supply housing. The connecting rod B (6054) passes through the side end of the power supply housing. One end of the connecting rod B (6054) is detachably connected to the connecting rod A (6053). The other end of the connecting rod B (6054) is fixed with a pull handle (6052) located outside the power supply housing.

7. A USB power supply device for a portable electronic device according to claim 6, characterized in that: One end of the connecting rod A (6053) is provided with a slot (60531), and one end of the connecting rod B (6054) is inserted into the slot (60531). The connecting rod A (6053) corresponding to the slot (60531) has multiple abutment grooves (60532) arranged in a ring array on its circumference. One end of the connecting rod B (6054) has multiple grooves (60541) arranged in a ring array. Each groove (60541) is provided with a spring piece (6055). One end of the connecting rod B (6054) is inserted into the slot (60531), and the spring piece (6055) is pressed and then springs back to abut against the abutment groove (60532).

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