Power supply lead-out device with wire body capable of being pulled and rolled

Abstract

The utility model provides a power supply lead-out device with a wire body capable of being pulled and rolled back. The power supply lead-out device comprises an outer shell composed of a tenon shell and a groove shell, a rotary connection disc arranged in the outer shell, a power line, a volute spiral spring, a power connection PCB, a power output PCB, a locking device and a metal pressing connection column used for fastening the tenon shell and the groove shell. The power connection PCB is attached to the inner side of the bottom wall of the tenon shell, the power output PCB is attached to the bottom face of the rotary connection disc, the power line is wound around the outer side of an annular sheet column of the rotary connection disc, and the volute spiral spring is arranged on the inner side of the annular sheet column of the rotary disc. When the rotary connecting disc rotates in the tenon shell, the elastic contact piece of the power connection end II of the power outlet PCB slides on the annular channel of the power connection end I of the power connection PCB. The power supply connecting-out device is arranged in the power bank / mobile power supply, the power line is rotationally stored in the power supply connecting-out device, the power line can be rotationally pulled out from the interior of the power bank / mobile power supply, and then a rotary power connection assembly arranged in the power supply connecting-out device is connected with a battery in the power bank / mobile power supply to charge an electronic product.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power supply line storage device, particularly to a power supply line storage device which is arranged in a mobile power supply and can be pulled out and rolled up. BACKGROUND

[0002] With the increasing number of electronic products carried by consumers, carrying a mobile power supply and a charging power supply line is one of the important means to solve the problem of supplementing the power of electronic products. At the same time, the storage of the long power supply line is also a problem that consumers pay great attention to. The storage of the power supply line is also an important research and development project for related manufacturers.

[0003] Chinese patent authorization announcement No. CN101282032B discloses an automatic positioning winding device, which comprises a lower cover, an upper cover fixedly connected with the lower cover, a winding device arranged between the lower cover and the upper cover, an inlet and outlet hole arranged on one side wall of the lower cover and the upper cover, and an inlet and outlet hole arranged on the other side wall. The winding device is composed of a center column arranged on the upper center of the lower cover, a rotating wheel sleeved on the center column, a brake member arranged on the upper part of the lower cover, and a vortex spring arranged in the rotating wheel. The bottom of the rotating wheel has an annular groove, the bottom of the annular groove is a flat surface, and a positioning device is arranged in the annular groove to separate the annular groove into a guide groove. The brake member can be embedded in the guide groove and can move relatively along the guide groove when the rotating wheel rotates.

[0004] According to the technical information disclosed in the specification and the attached drawings of the invention patent, the above-mentioned automatic positioning winding device only has the function of rotating to store the power supply line. It is still separated from the power bank and other mobile power supplies. When the user goes out to prepare a charging device for electronic products, he needs to carry the power bank / mobile power supply and the charging device at the same time. UTILITY MODEL CONTENTS

[0005] In order to solve the above-mentioned problem that the power supply line and the power bank / mobile power supply need to be carried in two parts in the prior art, the utility model provides a power supply line storage device which is arranged in the power bank / mobile power supply. The power supply line is rotated and stored in the power supply line storage device. The power supply line can be rotated and pulled out from the inside of the power bank / mobile power supply. Then, the battery in the power bank / mobile power supply is connected to the rotating power connection component in the power supply line storage device to charge the electronic products.

[0006] The utility model discloses a technical scheme for a power outlet device with a line body that can be pulled out and reeled in, which mainly comprises the following structural components: an outer shell composed of a tenon shell and a groove shell, a rotating connecting disc arranged in the outer shell, a power cord, a spiral spring, a power receiving PCB, a power outlet PCB, a locking device, and a metal pressing connecting column used for fastening the tenon shell and the groove shell.

[0007] Specifically, the power receiving PCB is attached to the inner side of the bottom wall of the tenon shell, and the two sides of the plate body are respectively provided with a power receiving end composed of a plurality of contact points and a power receiving end I composed of a plurality of loops, the power receiving end of the power receiving PCB is exposed outside the tenon shell, and the power receiving end I is located inside the tenon shell, the power outlet PCB is attached to the bottom surface of the rotating connecting disc, and the plate body is provided with a power receiving end II composed of a plurality of elastic contact pieces.

[0008] Specifically, the power cord is wound around the outside of the ring piece column of the rotating connecting disc, one end of the power cord is electrically connected to the power outlet PCB, and the other end of the power cord is provided with an external connector located outside the outer shell. The spiral spring is arranged on the inside of the ring piece column of the rotating disc, the fixed hanging end I is connected to the ring piece column, and the fixed hanging end II is hooked at the opening in the middle of the metal pressing connecting column. When the rotating connecting disc rotates in the tenon shell, the elastic contact pieces of the power receiving end II of the power outlet PCB slide on the loops of the power receiving end I of the power receiving PCB.

[0009] Further, the utility model discloses a power outlet device with a line body that can be pulled out and reeled in, wherein a tenon is arranged on the ring wall of the tenon shell, a groove is arranged on the ring wall of the groove shell, and the tenon shell and the groove shell are connected through the tenon and the groove. The metal pressing connecting column penetrates through the bottom wall of the groove shell, the boss arranged at one end of the metal pressing connecting column is embedded in the groove arranged on the outside of the bottom wall of the groove shell, and the other end of the metal pressing connecting column is fastened to the tenon shell through a screw.

[0010] Further, the utility model discloses a power outlet device with a line body that can be pulled out and reeled in, wherein the locking device comprises a rotating locking piece arranged on the bottom wall of the tenon shell, a pulling guide groove, a receiving guide groove and a locking tenon arranged on the bottom surface of the rotating connecting disc, and a head is arranged at the front end of the rotating locking piece. When the rotating connecting disc rotates in the tenon shell, the head of the rotating locking piece slides in the pulling guide groove or the receiving guide groove.

[0011] Further, the utility model discloses a power outlet device with a line body that can be pulled out and reeled in, wherein the rotating locking piece is arranged in the rotating groove arranged on the bottom wall of the tenon shell, an axle column is arranged in the rotating groove, an axle hole is arranged at one end of the rotating locking piece relative to the head, and the rotating locking piece is rotatably connected to the tenon shell through the axle hole and the axle column.

[0012] Further, the utility model discloses a power outlet device with a line body that can be pulled out and reeled in, wherein a through groove is arranged on the bottom wall of the tenon shell for exposing the power receiving end of the power receiving PCB, and a plate groove I is arranged on the bottom wall of the tenon shell for attaching the power receiving PCB to the tenon shell.

[0013] Alternatively, in the power output device with a retractable and rewindable wire described in this utility model, multiple through slots can be provided around the bottom wall of the tenon shell, and the exposed position of the power receiving PCB board on the bottom wall of the tenon shell can be changed through different through slots.

[0014] Furthermore, in the power output device for a retractable and rewindable wire described in this utility model, the bottom surface of the rotating disc is provided with a mounting groove II, and the power output PCB board is attached to the mounting groove II on the bottom surface of the rotating disc.

[0015] As an option, in the power output device of the present invention, which is a retractable and rewindable power supply device, the power input terminal II can be provided with multiple spring contacts on the power output PCB board, and each spring contact is provided with 5-10 spring contact pieces.

[0016] Furthermore, in the power output device for retractable and rewindable wire described in this utility model, a wire clamping piece is provided on the outer side of the rotating connecting disc ring post, the power line and the power output PCB board electrical connection end are clamped between the ring post and the wire clamping piece, and the fixed end I of the spiral spring is hooked into the notch of the rotating connecting disc ring post.

[0017] Furthermore, in the power output device with a retractable and rewindable cable described in this utility model, V-shaped grooves are provided between each set of tenons on the tenon shell and between each set of slots on the groove shell. After the tenon shell and the groove shell are engaged, the V-shaped grooves of the two are connected to each other on the outer shell, and the power output device is fixed in the power supply device through the V-shaped grooves.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The power cord retractable and rewindable device provided by this utility model can be fixedly installed inside a power bank or portable power bank, so that the power cord can be rotated and stored inside the power bank or portable power bank.

[0020] 2. Through the rotating power connection assembly consisting of a power connection PCB board and a power output PCB board, the electrical energy stored in the battery inside the power bank / power bank can be discharged through the power connection PCB board and the power output PCB board in conjunction with the power cord to charge electronic products when the power cord is rotated and pulled to any length.

[0021] The beneficial effects of this utility model are not limited to this description. For better understanding, a more detailed description is provided in the specific implementation section. Attached Figure Description

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 is a three-dimensional schematic view of the power outlet device with line body that can be pulled out and rolled back connected with a power bank or a mobile power supply

[0024] Figure 2 is a three-dimensional schematic view of the component structure of the power outlet device with line body that can be pulled out and rolled back

[0025] Figure 3 is a three-dimensional exploded schematic view of the structure of the power outlet device with line body that can be pulled out and rolled back (one)

[0026] Figure 4 is a three-dimensional exploded schematic view of the structure of the power outlet device with line body that can be pulled out and rolled back (two)

[0027] Figure 5 is a three-dimensional schematic view of the rotating connecting disc of the power outlet device with line body that can be pulled out and rolled back

[0028] Figure 6 is a three-dimensional schematic view of the tenon shell of the power outlet device with line body that can be pulled out and rolled back DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application, obviously, the described embodiments are some embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The main component structure of the power outlet device with line body that can be pulled out and rolled back of the present application will be further described below in combination with the drawings and specific embodiments.

[0032] As Figure 1 shown, the utility model discloses a line body can be pulled and rolled back power supply interface device A is arranged in the power bank / move power supply B. As Figure 2 Figure 3 shown, its main body structure includes the shell 1 and sets up the spin connected disc 2, power cord 3, scroll spring 4, electricity receiving PCB board 5, electricity outlet PCB board 6, locking device 7 and metal pressure connection column 8 in the shell 1. As Figure 3 Shown, the shell 1 is constituted by tenon shell 1a and groove shell 1b, and the tenon shell 1a and groove shell 1b are tightly connected by metal pressure connection column 8.

[0033] The utility model discloses a line body can be pulled and rolled back power supply interface device each component structure, as Figure 2 Figure 4 Shown, electricity receiving PCB board 5 sticks and in the bottom wall inboard of tenon shell 1a, and the electricity receiving PCB board 5 board body two sides are provided with the power receiving end 5a by a plurality of contact points 5a1 and electricity receiving end I 5b by a plurality of annular channels 5b1 respectively, and the electricity receiving end 5a of electricity receiving PCB board 5 is exposed outside tenon shell 1a, and electricity receiving end I 5b of electricity receiving PCB board 5 is located in tenon shell 1a.

[0034] Figure 2 Figure 4 Shown, electricity outlet PCB board 6 sticks and in the bottom surface of spin connected disc 2, and the electricity outlet PCB board 6 board body is provided with electricity receiving end II 6a by a plurality of elastic contact pieces 6a1. Figure 2 Figure 3 Shown, the spin connected disc 2 is provided with ring piece column 2a relative to the other side of electricity receiving PCB board 6, the power cord 3 is wound outside the ring piece column 2a of spin connected disc 2, one end of power cord 3 is electrically connected with electricity outlet PCB board 6, and the external connector 3a provided at the other end of power cord 3 is located outside the shell 1.

[0035] Figure 2 Figure 3 Shown, the scroll spring 4 is provided at the inboard of ring piece column 2a of spin connected disc 2, the fixed hanging end I 4a of scroll spring 4 is connected on the ring piece column 2a of spin connected disc 2, and the fixed hanging end II 4b of scroll spring 4 is hooked at the opening 8a in the middle of metal pressure connection column 8. Figure 2 Figure 3 Figure 4 Shown, when spin connected disc 2 rotates in tenon shell 1a, the elastic contact piece 6a1 of electricity outlet PCB board interface 6a slides on the annular channel 5b1 of electricity receiving end I 5b of electricity receiving PCB board 5.

[0036] The working principle of the utility model discloses a line body can be pulled and rolled back power supply interface device is further described below in connection with the drawings and specific embodiments.

[0037] Reference Figure 1 — Figure 4As shown, this utility model discloses a power outlet device A with a retractable and rewindable cable, which is installed inside the housing of a power bank / portable power supply B. (Reference) Figure 2 — Figure 4 As shown, the exposed power receiving end 5a of the power-connecting PCB board 5 is in contact with the power output end of the power bank or other portable power supply A. When the user pulls on the outer connector 3a of the power cord 3, the power cord 3 is pulled outward from inside the outer casing 1. Under the action of external force, the power cord 3 extends outward, simultaneously causing the rotating disc 2 inside the outer casing 1 to rotate. The spiral spring 4, driven by the rotating disc 2, rotates inward and coils, generating elastic force. When the power cord 3 suddenly loses its traction, the locking device immediately locks the power cord 3 inside the outer casing 1. When the power cord 3 slowly loses its traction, the rotating disc 2, driven by the rebound force of the spiral spring 4, rotates back, and the power cord 3 rewinds around the outer side of the annular post 2a of the rotating disc 2.

[0038] refer to Figure 2 As shown, when the rotating disk 2 rotates inside the outer casing 1, the spring contact 6a1 on the power receiving end II 6a of the power output PCB board 6 on the bottom surface of the rotating disk 2 rotates and slides on the ring track 5b1 of the power receiving end I 5b of the power receiving PCB board 5. When the power cord 3 is rotated and pulled out to any length, the current in the power bank / power bank B is output to the outside through the power receiving PCB board 5, the power output PCB board 6 and the power cord 3.

[0039] To improve the strength of the connection between the tenon and the groove shell of the power outlet device for retractable and rewindable wires in this utility model, such as... Figure 3 As shown, the tenon shell 1a has a tenon 1a1 on its annular wall, and the groove shell 1b has a groove 1b1 on its annular wall. The tenon shell 1a and the groove shell 1b are fastened together by the tenon 1a1 and the groove 1b1 on their annular walls. The outer shell 1, which is fastened together by the tenon shell 1a and the groove shell 1b, can improve the convenience of assembly and maintenance of the internal components of the power supply device.

[0040] To improve the compressive strength of the tenon and groove shell of the power outlet device for retractable and rewindable wires of this utility model after their connection, such as... Figure 3 As shown, one end of the metal pressing column 8 is provided with a boss 8b, and the outer side of the bottom wall of the groove shell 1b is provided with a groove 1b2. The metal pressing column 8 passes through the bottom wall of the groove shell 1b, and the boss 8a at one end is embedded in the groove 1b2 of the bottom wall of the groove shell 1b. The other end is fastened to the tenon shell 1a by a screw 8c (see reference). Figure 2 Figure 4 (As shown). The metal clamping post 8 not only secures the tenon shell 1a and the groove shell 1b, but also gives the outer casing 1 of the power supply outlet device good compressive strength.

[0041] Figure 5 Figure 6As shown, this utility model discloses a power outlet device for a retractable and rewindable cable, wherein the locking device includes a rotary locking piece 7a. Figure 6 (as shown), pull guide groove 2b, retract guide groove 2c and locking tenon 2d ( Figure 5 As shown), the rotary locking piece 7a is rotatably mounted on the bottom wall of the tenon shell 1a, and the pull guide groove 2b, the retract guide groove 2c, and the locking tenon 2d are mounted on the bottom surface of the rotary connecting plate 2. The front end of the rotary locking piece 7a is provided with a locking head 7a1 (…). Figure 6 As shown), when the rotating connecting disc 2 rotates within the tenon shell 1a, the locking head 7a1 of the rotating locking piece 7a slides within the pull guide groove 2b or the take-up guide groove 2c. Figure 5 (As shown).

[0042] Further Figure 6 As shown, a rotary groove 1b3 is provided on the bottom wall of the tenon shell 1b, and a shaft hole 7a2 is provided on one end of the rotary locking piece 7a relative to the locking head 7a1. The rotary locking piece 7a is set in the rotary groove 1b3 on the bottom wall of the tenon shell 1b, and a shaft post 1b4 is provided in the rotary groove 1b3. The rotary locking piece 7a is inserted into the shaft post 1b4 through the shaft hole 7a2 and rotatedly connected to the tenon shell 1a.

[0043] refer to Figure 5 Figure 6 As shown, when the power cord 3 of the retractable and rewindable power output device of this utility model is pulled outward to drive the rotating disk 2 to rotate, the locking piece 7a of the bottom wall of the tenon shell 1a slides in the pull guide groove 2b of the rotating disk 2. When the external pulling force of the power cord 3 stops instantly, the rotating disk 2 rotates in the opposite direction under the action of the rebound force of the spiral spring 4, and the locking piece 7a and its locking piece 7a1 rotate and lock into the arc groove 2d1 of the locking tenon 2d. The power cord 3 is in a positioning state where it cannot be rewound. When it is necessary to retract and rewind the power cord 3, the power cord 3 is pulled lightly to drive the rotating disk 2 to rotate slightly. The locking piece 7a and its locking piece 7a1 disengage from the arc groove 2d1 of the locking tenon 2d and slide in the take-up guide groove 2c of the rotating disk 2. The power cord 3 is coiled on the outside of the annular column 2a of the rotating disk 2 under the action of the rebound force of the spiral spring 4.

[0044] Figure 4 and Figure 6 As shown, this utility model discloses a power supply outlet device with a retractable and retractable cable. The bottom wall of its tenon shell 1a has a through groove 1a1 and a plate placement groove Ⅰ1a2. The power-connecting PCB board 5 is disposed within the plate placement groove Ⅰ1a2 of the tenon shell 1a (see reference). Figure 2 As shown), the power receiving end 5a of the power-connecting PCB board 5 is exposed outside the tenon shell 1a through the through groove 1a1 (see reference). Figure 4 (As shown).

[0045] Further Figure 4 and Figure 6As shown, the through groove 1a1 of the mortise shell 1a can be provided at multiple positions around the bottom wall of the mortise shell 1a, and the power receiving end 5a of the power receiving PCB 5 can be changed in the exposed position on the bottom wall of the mortise shell 1a through the different through grooves 1a1 of the mortise shell 1a. The power outlet device with the wire body capable of being pulled out and rewound can be connected with the power supply delivery end of the power bank / mobile power supply A through the different exposed positions of the power receiving end 5a of the power receiving PCB 5 on the mortise shell 1a.

[0046] Figure 5 As shown, the bottom surface of the rotary connecting disc 2 is provided with a plate groove II 2e, and the power outlet PCB 6 is attached to the plate groove II 2e on the bottom surface of the rotary connecting disc 2.

[0047] Figure 4 As shown, the power outlet PCB 6 is provided with multiple elastic contact pieces 6a1 on the power outlet PCB 6, and each elastic contact piece 6a1 is provided with 5-10 elastic contact pieces 6aa. Figure 2 As shown, when the rotary connecting disc 2 rotates in the outer shell 1, any elastic contact piece 6a1 of the power outlet PCB 6 rotates and slides on the ring channel 5b1 of the power receiving PCB 5, so that the phenomenon of poor contact between the single elastic contact piece 6a1 of the power outlet PCB 6 and the ring channel 5b1 of the power receiving PCB 5 is avoided, so as to ensure that the current in the power bank / mobile power supply A is continuously output to the outside through the power receiving PCB 5, the power outlet PCB 6 and the power supply line 3.

[0048] Figure 2 Figure 3 As shown, the power supply line 3 and the connection end of the power outlet PCB 6 are clamped between the ring piece column 2a and the wire clamping piece 2f. The fixed hanging end I 4a of the volute spring 4 is hooked in the notch 2a1 of the ring piece column 2a of the rotary connecting disc 2. The setting of the wire clamping piece 2f and the clamping cooperation with the ring piece column 2a can improve the anti-pulling stability of the power supply line 3 in the outer shell 1 of the power outlet device.

[0049] In order to improve the installation convenience and connection stability of the power outlet device with the wire body capable of being pulled out and rewound in the power bank / mobile power supply A. As Figure 1As shown, V-shaped grooves aa are arranged between each set of clamping tenons 1a1 on the tenon shell 1a, and V-shaped grooves aa are arranged between each set of clamping grooves 1b1 on the groove shell 1b; when the tenon shell 1a and the groove shell 1b are buckled to form the outer shell 1, the V-shaped grooves aa of the tenon shell 1a and the groove shell 1b are connected vertically on the outer shell 1. The power outlet device is fixed on the clamping column ba arranged in the power bank / mobile power supply A through any V-shaped groove aa on the tenon shell 1a and the groove shell 1b.

[0050] The above is a detailed introduction of the power outlet device with wire body that can be pulled out and rewound, according to the ideas of the embodiments of the present application, the specific implementation and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application, and any changes made according to the design ideas of the present application are within the scope of protection of the present application.

Claims

1. A power output device with a retractable and rewindable cable, characterized in that, The shell is composed of a tenon shell and a slot shell, a rotating connecting disc is arranged in the shell, a power line, a spiral spring, a power receiving PCB board, a power output PCB board, a locking device, and a metal pressing connecting column for fastening the tenon shell and the slot shell are arranged in the shell. The power receiving PCB board is arranged on the inner side of the bottom wall of the tenon shell, and the board body is provided with a power receiving end composed of a plurality of contact points and a power receiving end I composed of a plurality of loops on two sides respectively. The power output PCB board is arranged on the bottom surface of the rotating connecting disc, and the board body is provided with a power receiving end II composed of elastic contact pieces. The power line is wound outside the ring piece column of the rotating connecting disc, one end of the power line is electrically connected with the power output PCB board, and the other end of the power line is provided with an external connector located outside the shell. The spiral spring is arranged inside the ring piece column of the rotating disc, the fixed hanging end I is connected to the ring piece column, and the fixed hanging end II is hooked at the opening in the middle of the metal pressing connecting column. When the rotating connecting disc rotates in the tenon shell, the elastic contact pieces of the power receiving end II of the power output PCB board slide on the loops of the power receiving end I of the power receiving PCB board.

2. A cord retractable electrical outlet device according to claim 1, wherein, The ring wall of the tenon shell is provided with a tenon, the ring wall of the slot shell is provided with a slot, and the tenon shell and the slot shell are connected by the tenon and the slot. The metal pressing connecting column passes through the bottom wall of the slot shell, one end of the metal pressing connecting column is provided with a boss embedded in a groove arranged outside the bottom wall of the slot shell, and the other end of the metal pressing connecting column is fastened to the tenon shell by a screw.

3. A cord retractable power outlet device as claimed in claim 1, wherein, The locking device comprises a rotating locking piece arranged on the bottom wall of the tenon shell and a pulling guide groove, a receiving guide groove and a locking tenon arranged on the bottom surface of the rotating connecting disc, and the front end of the rotating locking piece is provided with a clamping head.

4. A power cord retraction device according to claim 3, wherein: The rotating locking piece is arranged in a rotating groove arranged on the bottom wall of the tenon shell, the rotating groove is provided with a shaft column, one end of the rotating locking piece opposite to the clamping head is provided with a shaft hole, and the rotating locking piece is rotatably connected to the tenon shell by being sleeved on the shaft column of the rotating locking piece through the shaft hole.

5. A cord retractable power outlet device as claimed in claim 1, wherein, The bottom wall of the tenon shell is provided with a through groove for exposing the power receiving end of the power receiving PCB board and a plate slot I for arranging the power receiving PCB board in close contact with the bottom wall of the tenon shell.

6. A power cord retracting device according to claim 5, wherein The through groove can be arranged on the periphery of the bottom wall of the tenon shell, and the power receiving end of the power receiving PCB board can be arranged in different positions on the bottom wall of the tenon shell by changing the through groove.

7. A power cord retracting device according to claim 1, wherein The bottom surface of the rotating connecting disc is provided with a plate slot II, and the power output PCB board is arranged in the plate slot II on the bottom surface of the rotating connecting disc.

8. A power cord retracting device according to claim 1, wherein The elastic contact pieces of the power receiving end II can be arranged on the power output PCB board in multiple numbers, and 5-10 elastic contact pieces are arranged on each elastic contact piece.

9. A power cord retracting device according to claim 1, wherein The outer side of the ring piece column of the rotating connecting disc is provided with a wire clamping piece, and the power line is clamped between the ring piece column and the wire clamping piece. The fixed hanging end I of the spiral spring is hooked in the notch of the ring piece column of the rotating connecting disc.

10. The power cord retracting device of claim 1, wherein, V-shaped grooves are arranged between each group of tenons on the tenon shell and between each group of slots on the slot shell. After the tenon shell and the slot shell are buckled together, the V-shaped grooves of the two are connected through the shell, and the power output device is fixed in the power device through the V-shaped groove.

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