An assembled power adapter

Abstract

The utility model discloses an assembled power adapter, comprising, main part subassembly, including first power adaptation module, set up in first power adaptation module one side's second power adaptation module and fixedly connected in one side of second power adaptation module and with first power adaptation module inner chamber is inserted the plug of joint, through the plug and first power adaptation module inner chamber insertion joint, can realize with the preliminary connection of second power adaptation module, and through the sliding of positioning block in connecting component along the inner wall of outer cover shell, until reach the location groove, second spring reset pushes the positioning block and inserts the location groove, realizes the axis spacing of both connections, and the outer cover shell is set on the surface of both, realizes the transverse spacing of both, forms double locking, thereby can effectively prevent the interface slackening caused by pulling or vibration, significantly improves the charging stability, and through the push piece cooperation extruding block and first spring can be positioned block and exit the inner chamber of location groove, realizes quick disassembly, improves the convenience of use.

Description

Technical Field

[0001] This utility model relates to the field of assembled power adapter technology, specifically an assembled power adapter. Background Technology

[0002] A power adapter is an electronic device that converts alternating current (AC) into direct current (DC). Its core function is to provide a stable and safe power input for electronic devices. Among them, mobile phone chargers, as a type of consumer electronics power adapter, work with a connecting cable to charge the battery of mobile devices, ensuring the safety of the mobile devices during charging.

[0003] In the present technology, power adapters adopt a multi-interface integrated design, such as USB or Type-C, to be compatible with different interfaces. By assembling the two interfaces together, the user can select the interface as needed, improving its versatility and portability. During use, the user can select the corresponding adapter body by separating or plugging the two according to the device interface type, realizing one device for multiple uses. However, the power adapters in the present technology use a plug-in method to assemble different interfaces. Since they rely on physical friction for fixation, they are very susceptible to external forces such as pulling or vibration, which can cause the different adapter bodies to loosen or fall off, resulting in charging interruption and affecting charging stability. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for a prefabricated power adapter that can solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An assembled power adapter, comprising, The main components include a first power adapter module, a second power adapter module disposed on one side of the first power adapter module, and a plug fixedly connected to one side of the second power adapter module and inserted into the inner cavity of the first power adapter module. The connecting assembly includes an outer shell, a pusher piece movably connected to the top and bottom of the outer shell, a positioning groove formed at the top and bottom of the outer shell, a pressing block disposed at the bottom of the pusher piece and slidably connected to the inner cavity of the positioning groove, a first spring fixedly connected to one side of the pressing block, a positioning block disposed at the top of the second power adapter module and movably connected to the inner cavity of the positioning groove, and a second spring fixedly connected to one end of the positioning block.

[0006] As a further embodiment of this utility model: the outer casing is fixedly connected to the surface of the first power adapter module, and the second power adapter module is located in the inner cavity of the outer casing and is movably connected to the inner cavity of the outer casing.

[0007] As a further embodiment of this utility model: the top and bottom of the second power adapter module are provided with grooves, and the bottom of the second spring extends into the inner cavity of the groove and is fixedly connected to the inner wall of the groove.

[0008] As a further embodiment of this utility model: the inner cavity of the second spring is provided with a telescopic rod, one end of which extends into the inner cavity of the groove and is fixedly connected to the inner wall of the groove, and the other end of the telescopic rod is fixedly connected to one end of the positioning block.

[0009] As a further embodiment of this utility model: the first spring is located in the inner cavity of the positioning groove, the end of the first spring away from the second spring is fixedly connected to one side of the inner cavity of the positioning groove, and one end of the pressing block is in contact with one end of the positioning block.

[0010] As a further embodiment of this utility model: a T-shaped block is fixedly connected to one side of the extrusion block, a T-shaped groove is provided on one side of the pusher plate, the T-shaped block is located in the inner cavity of the T-shaped groove, and is slidably connected to the inner cavity of the T-shaped groove.

[0011] As a further embodiment of this utility model: a sealing strip is fixedly connected to one end of the surface of the second power adapter module, and the side of the sealing strip away from the surface of the second power adapter module is in contact with the inner wall of the outer casing.

[0012] As a further embodiment of this utility model: a pushing reminder sticker is fixedly connected to the top of the pusher, and an anti-slip strip is provided on the top of the pushing reminder sticker.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By connecting the plug to the inner cavity of the first power adapter module, a preliminary connection with the second power adapter module can be achieved. The positioning block in the connecting assembly slides along the inner wall of the outer casing until it reaches the positioning groove. The second spring resets and pushes the positioning block into the positioning groove, thus limiting the axis of the connection between the two. The outer casing is fitted onto the surfaces of both, thus limiting the lateral movement of both, forming a double lock. This effectively prevents the interface from loosening due to pulling or vibration, significantly improving charging stability. The positioning block can be removed from the inner cavity of the positioning groove by the push plate, the squeezing block and the first spring, achieving quick disassembly and improving ease of use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional structural view of the first power adapter module, the outer casing, and the second power adapter module of this utility model in a separated state. Figure 3 This is a three-dimensional structural view of the first power adapter module, the outer casing, and the second power adapter module of this utility model in their connected state. Figure 4 This is a three-dimensional view of the pusher plate of this utility model from below. Figure 5 This is a utility model Figure 2 A magnified 3D view of the structure at point A in the middle; Figure 6 This is a utility model Figure 3 A magnified 3D view of the structure at point B in the middle section; The reference numerals and names in the figure are as follows: 100. Main component; 110. First power adapter module; 120. Second power adapter module; 121. Groove; 130. Plug; 200. Connecting component; 210. Outer shell; 220. Push plate; 221. T-slot; 230. Positioning slot; 240. Pressing block; 241. T-block; 250. First spring; 260. Positioning block; 270. Second spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1 like Figure 1-6 The image shown is the first embodiment of this utility model, which provides a modular power adapter, including: The main component 100 includes a first power adapter module 110, a second power adapter module 120 disposed on one side of the first power adapter module 110, and a plug 130 fixedly connected to one side of the second power adapter module 120 and inserted into the inner cavity of the first power adapter module 110. The connecting assembly 200 includes an outer shell 210, a pusher 220 movably connected to the top and bottom of the outer shell 210, a positioning groove 230 formed at the top and bottom of the outer shell 210, a pressing block 240 disposed at the bottom of the pusher 220 and slidably connected to the inner cavity of the positioning groove 230, a first spring 250 fixedly connected to one side of the pressing block 240, a positioning block 260 disposed at the top of the second power adapter module 120 and movably connected to the inner cavity of the positioning groove 230, and a second spring 270 fixedly connected to one end of the positioning block 260.

[0017] like Figure 1-6As shown, the second power adapter module 120 is inserted into the inner cavity of the outer casing 210, and the plug 130 is inserted into the inner cavity of the first power adapter module 110, completing the circuit connection. The positioning block 260 expands outward under the action of the second spring 270 and is locked into the inner cavity of the positioning groove 230, achieving initial axial locking. The outer casing 210 is fitted on the surface of both, achieving lateral limitation of both, forming a double lock, which can effectively prevent the interface from loosening due to pulling or vibration, and significantly improve charging stability. By pushing the pusher 220, the pressing block 240 can be driven to stretch the first spring 250 and press the positioning block 260. When the positioning block 260 is pressed, it will drive the second spring 270 to retract into the groove 121, and the positioning block 260 will disengage from the inner cavity of the positioning groove 230. Then the second power adapter module 120 can be freely pulled out, achieving quick disassembly, which makes it convenient for personnel to select the first power adapter module 110 or the second power adapter module 120 as needed.

[0018] Example 2 Reference Figure 1-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0019] In this embodiment, the outer casing 210 is fixedly connected to the surface of the first power adapter module 110, and the second power adapter module 120 is located in the inner cavity of the outer casing 210 and is movably connected to the inner cavity of the outer casing 210.

[0020] The second power adapter module 120 has grooves 121 at both the top and bottom. The bottom of the second spring 270 extends into the inner cavity of the groove 121 and is fixedly connected to the inner wall of the groove 121.

[0021] The inner cavity of the second spring 270 is provided with a telescopic rod, and one end of the telescopic rod extends into the inner cavity of the groove 121 and is fixedly connected to the inner wall of the groove 121. The other end of the telescopic rod is fixedly connected to one end of the positioning block 260.

[0022] The first spring 250 is located in the inner cavity of the positioning groove 230. The end of the first spring 250 away from the second spring 270 is fixedly connected to one side of the inner cavity of the positioning groove 230. One end of the pressing block 240 is in contact with one end of the positioning block 260.

[0023] like Figure 1-6As shown, the outer casing 210 is fixed to the surface of the first power adapter module 110, providing a mounting base for the second power adapter module 120. The second power adapter module 120 is located inside the outer casing 210 and is movably connected, which not only achieves lateral limitation of the connection between the two, but also facilitates the free insertion and removal of the second power adapter module 110 by providing a movement trajectory. By enclosing the surface of the first power adapter module 110 and the second power adapter module 120 with the outer casing 210, protection can be achieved to prevent damage caused by external impacts. The bottom of the second spring 270 is fixed to the inner wall of the groove 121. The top is connected to the positioning block 260, which provides outward elastic force to the positioning block 260, ensuring that the positioning block 260 automatically snaps into the positioning groove 230 when it is inserted later. The telescopic rod is embedded in the inner cavity of the second spring 270, with one end fixed to the inner wall of the groove 121 and the other end connected to the positioning block 260, which restricts the movement trajectory of the positioning block 260 and prevents the second spring 270 from shifting when it is compressed or reset. The first spring 250 is fixed to one side of the inner cavity of the positioning groove 230, and the other end is connected to the pressing block 240. The reset elastic force of the first spring 250 can drive the pressing block 240 to automatically reset.

[0024] Example 3 Reference Figure 2 , 3 4 and 6 are the third embodiment of this utility model, which is based on the first two embodiments.

[0025] In this embodiment, a T-shaped block 241 is fixedly connected to one side of the extrusion block 240, and a T-shaped groove 221 is provided on one side of the pusher plate 220. The T-shaped block 241 is located in the inner cavity of the T-shaped groove 221 and is slidably connected to the inner cavity of the T-shaped groove 221.

[0026] A sealing strip is fixedly connected to one end of the surface of the second power adapter module 120, and the side of the sealing strip away from the surface of the second power adapter module 120 is in contact with the inner wall of the outer casing 210.

[0027] The top of the push plate 220 is fixedly connected with a push indicator sticker, and the top of the push indicator sticker is provided with an anti-slip strip.

[0028] like Figure 2 , 3As shown in Figures 4 and 6, the T-shaped block 241 at the bottom of the extrusion block 240 is embedded in the T-shaped groove 221 of the pusher plate 220, restricting the movement trajectory of the extrusion block 240 to a linear sliding motion. This prevents the extrusion block 240 from shifting its position during movement, making it difficult to apply uniform pressure to the positioning block 260. Simultaneously, the T-shaped groove 221 and the T-shaped block 241, in conjunction with the first spring 250, enable the extrusion block 240 to smoothly return to its original position after extrusion, preventing twisting or shifting of the first spring 250 during the return process. The sealing strip at one end of the surface of the second power adapter module 120 tightly adheres to the outer surface. The inner wall of the cover 210 can prevent dust or liquid from entering the interior of the outer cover 210. At the same time, the sealing strip provides flexible contact to reduce external mechanical impact and protect the second power adapter module 120 and the first power adapter module 110. The pushing direction of the pusher 220 is indicated by the push indicator sticker on the pusher 220 through the icon, guiding the user to operate correctly. At the same time, the addition of anti-slip strips can increase the friction of the pusher 220 surface, ensuring that the user can apply force stably when operating with one hand, and can still push reliably, especially in humid or oily environments.

[0029] In one embodiment, the power adapter further includes a power-off protection system. This system includes a module interface detection unit that detects the connection status (whether it is properly inserted), type matching (e.g., input module voltage level, output module interface type), and interface contact resistance of the detachable modules (input / output / power modules) to prevent overheating due to poor contact. It connects to each assembled module via a "mechanical-electrical composite interface" (including power pin VCC, communication pins SDA / SCL, and status pin INT) and outputs detection signals to the main control unit. The main control unit receives the module interface detection signals and protection data from each module, determines the overall system status (module matching / normal connection / abnormal), and outputs tiered power-off commands. It communicates bidirectionally with the module interface detection unit, tiered execution unit, and multi-module protection coordination unit, supporting I2C / SPI multi-module data interaction. The tiered execution unit is divided into "system-level total interruption" (cutting off AC input) and "module-level partial interruption" (cutting off power output of a single abnormal module) to prevent a single module failure from causing overall system failure. System-level execution elements (relays) are connected in series on the AC input side; module-level execution elements (MOSFETs) are integrated inside each detachable module and controlled by the main control unit. The multi-module protection coordination unit aggregates the independent protection signals from each detachable module (such as output module overcurrent and power module overtemperature) and provides cross-module collaborative protection logic to the main control unit (such as synchronously cutting off associated input modules when a module overtemperatures). It communicates with the built-in sub-controllers of each module via the CAN bus to collect module protection status in real time. The auxiliary power distribution unit provides isolated auxiliary power (5V / 3.3V) to the detachable modules and monitors overcurrent on the module power pins (to prevent module short circuits from draining the entire power supply). The output is connected to the power pin of the module interface via a "reverse insertion protection-overcurrent self-resetting fuse".

[0030] Considering the detachable nature of modular components and the potential for poor interface contact, the design focuses on module interface safety protection, cross-module collaborative protection, and hot-swap protection circuits. The input module identification and overvoltage protection circuit (compatible with plug modules from multiple regions) identifies the input module type (e.g., AC100V / 220V plug module) to prevent overvoltage damage caused by mismatched input voltage; it also detects poor contact in the input module (e.g., loose plug module) and cuts off the input. Module identification components include a built-in "identity code resistor" R_id (different resistance values ​​correspond to different voltage levels, e.g., R_id=10kΩ for AC100V modules, R_id=20kΩ for AC220V modules); contact status detection uses an optocoupler U1 (PC817, to detect whether the module interface mechanical contact is in place); and actuation components include a system-level relay K1 (G6B-1114P-US, 5V coil, connected in series with the AC live wire) and a driver chip U2 (ULN2003, relay driver). When the input module is inserted, its "encoding pin" is connected to the AD pin (PA0) of the main control unit MCU (STM32G030F6P6, 32-bit microcontroller) through the module interface. The MCU identifies the module type by reading the R_id voltage divider value (e.g., V_id=5V×(R_id / (R_id+R_ref)), R_ref=10kΩ fixed resistor). A "mechanical position detection pin" is set at the module interface. When the module is inserted firmly, the mechanical contacts close, the primary of U1 is turned on (LED lights up), and the secondary output is low to the GPIO pin (PB0) of the MCU. If it is not inserted firmly, the secondary of U1 outputs a high level (poor contact signal).

[0031] Type mismatch protection: If an AC100V module is inserted but the mains input is 220V, the MCU detects R_id=10kΩ (corresponding to 100V), but the bus voltage after rectification is >200V (bus voltage ≈311V when 220V input), and determines "voltage mismatch". It controls U2 to drive K1 to disconnect the AC input. Poor contact protection: When the module is loose, the secondary output of U1 is high level, the MCU triggers "interface abnormality", cuts off K1 within 300ms and lights up the red LED at the module interface (alarm indicator).

[0032] The module interface over-temperature protection circuit (preventing overheating due to poor contact) detects the temperature of detachable module interfaces (such as the metal contact points between the input plug and the host, and between the output module and the host) to prevent overheating and fire caused by excessive contact resistance. Distributed detection elements are used, with each module interface having a built-in NTC thermistor RT_int (MF58-10kΩ / 3950, in close contact with the metal contact piece); signal acquisition: RT_int is connected to the AD acquisition channel (PA1~PA3, supporting simultaneous detection of 3 interfaces) of the main control unit via the module interface's "temperature detection pin"; tiered execution: when the interface temperature exceeds the threshold, the power to the corresponding module is preferentially cut off (module-level execution); if the temperature continues to rise, the total system input is cut off (system-level execution).

[0033] Under normal contact conditions, the interface contact resistance is <50mΩ, and the temperature is approximately equal to the ambient temperature (RT_int=10kΩ at 25℃, voltage divider V_int=2.5V). In cases of poor contact (e.g., loose plug), the contact resistance is >500mΩ, and heat is generated when current flows (e.g., with an output current of 3A, contact power consumption P=I²R=3²×0.5=4.5W). When the RT_int temperature rises to 85℃, the resistance drops to 2kΩ, and the voltage divider V_int=5V×(2k / (2k+10k))≈0.83V. The MCU detects V_int < 1V (corresponding to the 85℃ threshold) and immediately sends a command via I2C to the sub-controller built into the output module, cutting off the P-MOS transistor of that module (output stage disconnection). If the temperature does not decrease within 100ms (V_int < 0.5V, corresponding to 100℃), the system-level relay K1 is triggered to disconnect the AC input.

[0034] The output module features an independent overcurrent protection circuit (compatible with multi-interface modules). For detachable output modules (such as USB-A, USB-C, and DC12V interface modules), it provides independent overcurrent / short-circuit protection, preventing a single module failure from affecting other modules. The module incorporates built-in detection: a sampling resistor R_sense (0.05Ω / 2W, connected in series in the module output circuit) and a comparator U3 (LM393, module-level local overcurrent detection). Module-level execution is achieved through an N-MOS transistor Q1 (AO3400, 30V / 5A, connected in series to the module output positive terminal). Master-slave collaboration is implemented, with the module sub-controller (MCU sub-controller, PIC12F1840) communicating with the master control unit via the module interface's SPI pin to report overcurrent status.

[0035] The output current Iout flows through R_sense, generating V_sense = Iout × 0.05Ω (e.g., when Iout = 5A, V_sense = 0.25V); the non-inverting input of U3 is connected to V_sense, and the inverting input is connected to the reference voltage Vref (set to 0.3V by TL431 + voltage divider resistors, corresponding to an overcurrent threshold of 6A); the gate of Q1 is controlled by the GPIO pin (RC0) of the module sub-controller, and RC0 is connected to the main control unit through the SPI pin to achieve "local fast cut-off + main system status synchronization". Local fast protection: When a short circuit occurs, Iout=10A, V_sense=0.5V>0.3V, U3 outputs a high level to trigger the module sub-controller interrupt, RC0 immediately outputs a low level (Q1 is cut off), cutting off the output (response time <10μs); In coordination with the main system, the sub-controller sends "overcurrent code 0x02" to the main control unit via SPI. The main control unit records the faulty module ID and lights up the corresponding yellow LED (to distinguish the faulty module). After 3 seconds, it attempts to restart the module (it recovers after the short circuit is cleared).

[0036] The module hot-swap surge protection circuit (anti-swapping impact) suppresses instantaneous surge current / voltage during module hot-swapping (hot-swap) to prevent damage to the module and host. Surge suppression includes a TVS diode D1 (SMBJ33A, 33V unidirectional, connected in parallel to the module interface power pin VCC); a soft-start circuit includes an NTC thermistor RT_inrush (MS300-10, 10Ω cold resistance, connected in series in the module VCC input circuit) and a relay K2 (signal relay, shorted after the module is firmly inserted to avoid normal power consumption). At the moment of insertion and removal, when the module is inserted, the RT_inrush cold resistor of 10Ω limits the surge current (e.g., initial current < 0.5A when input is 5V), and D1 clamps the VCC pin voltage < 36V (to prevent electrostatic discharge or overvoltage surge). After the module is firmly inserted, the "position detection pin" of the module interface closes (same as 1. Input module identification). The main control unit drives K2 to engage after a 200ms delay (to ensure stable contact), shorting RT_inrush (to reduce normal power consumption), and the module enters normal operating state.

[0037] System collaborative workflow (modular self-test and anomaly handling): During the module installation self-test phase, after the module is inserted, the main control unit performs triple verification through "encoded resistor identification + mechanical positioning detection + sub-controller communication handshake" (for example, input modules need to pass "R_id matching + U1 photoelectric signal low level + SPI communication response"). Upon successful verification, the blue LED on the module interface illuminates (ready indicator). If verification fails (e.g., incorrect encoded resistor, poor contact, no response from the sub-controller), the main control unit prevents the module from powering on, and the red LED flashes as an alarm. Real-time monitoring during operation: The main control unit collects temperature (interface / power device), current, and voltage data for each module every second through the multi-module protection coordination unit (CAN bus). In case of a single module anomaly (e.g., output overcurrent), module-level execution is triggered first (cutting off the module's output), the main system records the fault, and other modules continue to operate normally. In case of multi-module associated anomalies (e.g., poor contact of the input module causing bus overvoltage + power module overtemperature), the main control unit triggers system-level execution (cutting off the AC input) to prevent cascading failures. Dynamic handling of module insertion and removal: During hot-swapping, the main control unit detects an interruption in the module interface signal, immediately cuts off the auxiliary power supply to the module (through the electronic switch of the auxiliary power distribution unit), and simultaneously shuts down the associated power output to avoid the generation of electric arc.

[0038] In use, if the user selects the second power adapter module 120 according to the device interface type, they can align the second power adapter module 120 with the inner cavity of the outer casing 210 and slowly push it in. During the pushing process, the positioning block 260 will be compressed by the pressure as it moves, causing the second spring 270 to be compressed into the inner cavity of the groove 121. When the positioning block 260 reaches the position of the positioning groove 230, the positioning block 260 and the second spring 270 will lose their squeezing force. Then, the restoring force of the second spring 270 will cause the positioning block 260 to be locked into the positioning groove 230. At the same time, the plug 130 will be inserted into the inner cavity of the socket of the first power adapter module 110 to achieve conductivity and facilitate the output of current later. The outer casing 210 realizes the lateral limitation of both, and the positioning block 260, together with the positioning groove 230, realizes the axial limitation of the connection between the two, thus forming a double lock to ensure the connection. The robustness prevents the interface from loosening due to pulling or vibration later, significantly improving charging stability. When the first power adapter module 110 is selected according to the device interface type, the user can push the pusher 220 with their finger, causing the pusher 220 to slide along the direction of the push indicator sticker on the top. The pusher 220 drives the pressing block 240 to move towards the positioning block 260 until it contacts it. Pressure can be applied to the positioning block 260, and the force on the positioning block 260 will cause the second spring 270 to retract into the groove 121, and the positioning block 260 will disengage from the inner cavity of the positioning groove 230, thereby releasing the axial limit of the connection, making it easy to freely pull out the second power adapter module 120 and achieve disassembly. At this time, the socket of the first power adapter module 120 will be exposed, making it easy for users to connect and use. This not only ensures the convenience of use but also improves the assembly firmness, effectively reduces the risk of charging interruption, and extends the service life of the device.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated power adapter, characterized in that, include, The main component (100) includes a first power adapter module (110), a second power adapter module (120) disposed on one side of the first power adapter module (110), and a plug (130) fixedly connected to one side of the second power adapter module (120) and inserted into the cavity of the first power adapter module (110). The connecting assembly (200) includes an outer shell (210), a pusher (220) movably connected to the top and bottom of the outer shell (210), a positioning groove (230) formed at the top and bottom of the outer shell (210), a pressing block (240) disposed at the bottom of the pusher (220) and slidably connected to the inner cavity of the positioning groove (230), a first spring (250) fixedly connected to one side of the pressing block (240), a positioning block (260) disposed at the top of the second power adapter module (120) and movably connected to the inner cavity of the positioning groove (230), and a second spring (270) fixedly connected to one end of the positioning block (260).

2. The assembled power adapter according to claim 1, characterized in that, The outer casing (210) is fixedly connected to the surface of the first power adapter module (110), and the second power adapter module (120) is located in the inner cavity of the outer casing (210) and is movably connected to the inner cavity of the outer casing (210).

3. The assembled power adapter according to claim 1, characterized in that, The second power adapter module (120) has grooves (121) at both the top and bottom. The bottom of the second spring (270) extends into the inner cavity of the groove (121) and is fixedly connected to the inner wall of the groove (121).

4. The assembled power adapter according to claim 1, characterized in that, The inner cavity of the second spring (270) is provided with a telescopic rod, and one end of the telescopic rod extends into the inner cavity of the groove (121) and is fixedly connected to the inner wall of the groove (121). The other end of the telescopic rod is fixedly connected to one end of the positioning block (260).

5. A prefabricated power adapter according to claim 1, characterized in that, The first spring (250) is located in the inner cavity of the positioning groove (230). The end of the first spring (250) away from the second spring (270) is fixedly connected to one side of the inner cavity of the positioning groove (230). One end of the pressing block (240) is in contact with one end of the positioning block (260).

6. A prefabricated power adapter according to claim 1, characterized in that, A T-shaped block (241) is fixedly connected to one side of the extrusion block (240), and a T-shaped groove (221) is opened on one side of the pusher (220). The T-shaped block (241) is located in the inner cavity of the T-shaped groove (221) and is slidably connected to the inner cavity of the T-shaped groove (221).

7. A prefabricated power adapter according to claim 1, characterized in that, A sealing strip is fixedly connected to one end of the surface of the second power adapter module (120), and the side of the sealing strip away from the surface of the second power adapter module (120) is in contact with the inner wall of the outer casing (210).

8. A prefabricated power adapter according to claim 1, characterized in that, The top of the pusher (220) is fixedly connected with a push reminder sticker, and the top of the push reminder sticker is provided with an anti-slip strip.

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