A shared power bank device

Abstract

A shared power bank device includes a power bank body and a shell, and also has an electric push mechanism and a charging contact mechanism; each power bank has a limited groove and straight teeth at the lower end of the shell; the shell has a rear shell at the rear lower end, and the charging circuit and control circuit of the power bank body are installed in the rear shell; the upper end of one side of the shell has an input port, the lower end of the input port has a limited block, and the lower part of one side of the shell has a push port; the other side of the shell has a double-layer structure, and multiple identification modules of the power bank body are respectively installed in the double-layer structure on the other side of the shell; the charging contact mechanism has multiple sets, and each identification module is respectively installed with a charging contact mechanism at the front and rear ends; the rear part of the electric push mechanism is installed in front of the lower end of the rear shell, and multiple power banks are put into the shell from the input port; multiple groups of charging contact mechanisms are respectively electrically connected to the two ends of the charging circuit power output. The overall structure of the present invention is compact and small in size, and can be placed and used in a relatively small area, which brings convenience to users.

Description

Technical Field

[0001] The present invention relates to the field of charging technology equipment, and in particular to a shared power bank device. Background Art

[0002] With the advancement of technology, there are more and more shared devices, such as shared bicycles, shared power banks, etc. Among them, shared power banks can provide charging functions for people's mobile phones and other Internet devices, which brings convenience to people and economic benefits to the equipment providers who provide services. The general structure of the existing shared power banks currently includes a shell, several power banks, a QR code on the outer end of the shell, and a charging circuit and a control circuit inside. In order to ensure that charging services can be provided to more chargers, the existing shared power banks have several power bank placement grids, and multiple placement grids are horizontally spaced at a certain distance and located at the upper end of the shell or at the side end of the shell; and in order to ensure that unpaid chargers cannot use the power bank, the current shared power banks have an electromagnetic push rod mechanism at the lower side end of each placement grid (relative position, multiple placement grids are at the upper end of the shell, and multiple electromagnetic push rod mechanisms are respectively located at the lower end of the placement grid, and the placement grid is located at the front side end of the shell, and multiple electromagnetic push rod mechanisms are respectively located at the rear end of the placement grid, which varies).

[0003] In the current use of shared power banks, the charger who needs to use the power bank scans the QR code with his mobile phone and establishes a connection with the device. The control circuit in the power bank outputs power for a certain period of time to enter the power input ends of the electromagnetic push rod mechanism (the output power can be adjusted as needed). Then, the push rod of the electromagnetic push rod mechanism retracts (after taking out the power bank, the control circuit stops outputting power, and the push rod of the electromagnetic push rod mechanism resets), and separates from the buckle slot at the lower side end (relative position) of the power bank. In this way, the charger can take out the power bank to charge mobile phones, etc. After charging, the charger inserts the power bank into the corresponding placement grid (a certain force is required to insert the power bank back into the placement grid), and the lower end of the power bank (relative position) pushes the top rod of the electric push rod mechanism to retract (the lower end of the power bank presses the inclined surface of the upper end face of the push rod, so the push rod retracts, and the inclined surface of the upper end face of the push rod is similar to the inclined surface structure of the lock tongue of the door lock), and then the push rod is snapped into the buckle groove again under the action of the push rod spring of the electromagnetic push rod mechanism, so that other chargers can only use the power bank after paying (after the charger returns the power bank, the power bank is lowered The two metal contacts at the side end {relative position} contact with the two metal sheets at the lower end of each placement grid that are connected to the charging circuit in the shared power bank, thereby charging the power bank after use. At the same time, the identification module located in the middle of the lower end of the placement grid identifies the identification chip in the middle of the lower end of the power bank (the two are non-contact identification, effective within 1 cm interval), obtains the corresponding power bank information, and then sends the corresponding power bank return time information to the cloud. After the third-party application software deducts the fee on time, the charger completes the entire process of using and returning the power bank).

[0004] Since each placement grid of the existing shared power banks has an electromagnetic push rod mechanism, and the electromagnetic push rod mechanism has a certain volume (there is a certain gap between multiple placement grids), the current shared power banks are relatively large in size, which is inconvenient to use in some places with small placement areas. In addition, the cost of the overall equipment is increased accordingly due to the presence of multiple sets of electromagnetic push rod mechanisms, and the probability of failure is increased. In addition, the charger needs a certain amount of force to take out the power bank, especially when returning the power bank and inserting the power bank back into the placement grid, which not only brings inconvenience to the charger, but also causes the power bank to be unable to charge when the charger does not insert it properly, and brings unnecessary economic losses to the charger and the owner (others directly take it, the power bank is not in place, the identification module cannot recognize the chip, and it is always in the payment time state, causing losses to the charger). Summary of the invention

[0005] In order to overcome the structural limitations of the existing shared power banks, since each placement grid has an electromagnetic push rod mechanism, etc., each electromagnetic push rod mechanism has a certain volume, resulting in a relatively large overall volume of the shared power bank, which is inconvenient to use in some places with small placement areas, and correspondingly increases the overall equipment cost, and increases the probability of failure, as well as the disadvantage of inconvenience to the charger when returning the power bank. The present invention provides an application in which multiple power banks can be placed straight down from top to bottom in a shell without gaps. The overall structure is compact and the volume is small. They can be placed and used in a relatively small area, which brings convenience to the user. The power bank is pushed out by an electric pushing mechanism, which makes it more convenient for the charger to take out the power bank. When returning the power bank, the power bank can be directly put into use through the upper end of the shell side without using external force, which brings convenience to the charger. A shared power bank device.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A shared power bank device comprises a power bank body and a shell, characterized in that it also has an electric push mechanism and a charging contact mechanism; the lower end of the outer shell of each of the multiple power banks matched with the power bank body is laterally provided with a limit groove, and the lower end of each power bank has a plurality of straight teeth at a spacing distance; the rear lower end of the shell is provided with a rear shell, and the charging circuit and control circuit of the power bank body are installed in the rear shell; the upper end of one side of the shell is provided with an input port, the lower end of the input port is provided with a limit block, and the lower part of one side of the shell is provided with a push port; the other side of the shell is a double-layer structure, and the multiple identification modules of the power bank body are respectively installed in the double-layer structure on the other side of the shell with a spacing distance from top to bottom, and the upper and lower spacing between every two identification modules and each The upper and lower spacings of the two power banks are consistent; the charging contact mechanisms have the same number of sets, and the number of sets of charging contact mechanisms is twice the number of power banks. A set of charging contact mechanisms is installed at equal distances at the front and rear ends of each identification module; the rear part of the electric pushing mechanism is installed at the front side of the lower end of the rear shell body, and multiple power banks are put into the shell body from the input port; the identification chip of each power bank is located at the side end of each identification module, and the two metal contacts of each power bank are in contact with the contact balls of two sets of charging contact mechanisms; the two sets of charging contact mechanisms located at the front and rear ends of each identification module are grouped together, and multiple sets of charging contact mechanisms are respectively electrically connected to the two ends of the charging circuit power output of the shared power bank body.

[0008] Furthermore, the outer diameter of the power bank is smaller than the inner diameter of the shell.

[0009] Furthermore, the outer diameter of the limiting block of the input port is smaller than the inner diameter of the limiting groove at the lower end of the power bank.

[0010] Furthermore, the spacing between each identification module and the front and rear sets of charging contact mechanisms and each power bank identification chip and the two metal contacts at the front and rear ends are in a straight line laterally.

[0011] Furthermore, each set of charging contact mechanisms includes a sleeve, a spring, and a movable rod. One end of the sleeve is horizontally installed on the circuit board, the spring is located inside one end of the sleeve, one end of the movable rod is located inside the other side of the sleeve, and the other end of the sleeve is provided with an isolation plate with an opening. The opening is larger than the outer diameter of the other end of the movable rod, and there is a touch ball at the other end of the movable rod.

[0012] Furthermore, the electric pushing mechanism includes multiple rotating wheels, a motor reduction mechanism, and a shell. The upper end of the shell is an open structure, and the front and rear ends of the shell have multiple axial holes from left to right. The lower end of the shell of the motor reduction mechanism is longitudinally installed in the front part of the lower end of the rear shell. There are shaft rods on the front and rear sides of the middle of the multiple rotating wheels, and the front and rear end shaft rods of two rotating wheels are respectively sleeved in the front and rear shaft holes of the left end and the right end of the shell. The front and rear end shaft rods of the third rotating wheel are located in the middle shaft holes of the front and rear ends of the shell. The rear end shaft rod of the third rotating wheel is located in the middle of the rear outer end of the shell and is installed together with the front side power output shaft of the motor reduction mechanism. The shell and rotating wheels of the electric pushing mechanism are located at the lower end of the shell.

[0013] Furthermore, each of the multiple rotating wheels of the electric pushing mechanism has longitudinal spur teeth distributed in a ring on the surface, the upper ends of the multiple rotating wheels are in a plane, and the surface spur teeth are meshed with the spur teeth at the lower end of the power bank, and the upper end height of the multiple rotating wheels is higher than the upper end height of the outer shell.

[0014] Furthermore, the height of the lower end of the ejection port of the shell is lower than the height of the upper end of the rotating wheel.

[0015] The beneficial effects of the present invention are as follows: multiple power banks of the present invention can be placed straight down from top to bottom into the shell without gaps, and all power banks are pushed out by a unified electric push mechanism, and there is no need to use an electromagnetic push rod mechanism that is consistent with the number of power banks, thereby greatly saving installation space, and the overall structure is compact and small in size, and can be placed and used in a relatively small area, which brings convenience to users. The present invention can push out the power bank through the electric push mechanism, and it is more convenient for the charger to take out the power bank, and when returning the power bank, it does not need to use external force and can be directly put into use through the upper end of the shell side. The power bank brings convenience to the charger. The present invention also improves the market competitiveness of the product and can bring good economic benefits to the producer. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a partial structural schematic diagram of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the electric pushing mechanism of the present invention.

[0020] Figure 4 It is a front view structural schematic diagram of one of the power banks of the present invention.

[0021] Figure 5 It is a schematic diagram of the upward structure of one of the power banks of the present invention. DETAILED DESCRIPTION

[0022] Figure 1 , 2As shown in , 3, 4, and 5, a shared power bank device comprises a power bank body 5 having a QR code 1, a charging circuit 2 and a control circuit 3, an identification module 4, etc., and a shell 6 (a movable door 61 is hingedly installed at the rear end, and the movable door 61 is locked at ordinary times. The owner can open the movable door 61 to maintain the equipment in the shell), the QR code 1 is bonded to the front of the upper end of the shell 6, and it also has an electric pushing mechanism 7 and a charging contact mechanism 8; a plurality of power banks 51 (eight are used in this embodiment) matched with the shared power bank body, each power bank 51 has a limit groove 511 on the front side of the lower end of the shell, and the lower end of each power bank 51 has a plurality of straight teeth 512 at a certain distance from left to right; the shell 6 is a rectangular structure, and the shell The lower rear end of the body 6 has an integrally formed and interconnected rectangular rear shell 62, and the charging circuit 2 and the control circuit 3 are installed on the inner rear end of the rear shell 62; the upper right end of the shell 6 has a rectangular input port 63 with an inner diameter slightly larger than the outer diameter of the power bank 51, and the lower front end of the input port 63 has a cylindrical limit block 631. The lower right end of the shell 6 has a rectangular opening as a power bank ejection port 64, and the inner diameter of the ejection port 64 is slightly larger than the outer diameter of the power bank 51 (the front and rear ends in the ejection port and the front and rear ends in the shell are planar structures); the inner left side of the shell 6 is a double-layer structure, and multiple identification modules 4 (8 in this embodiment) of the power bank body are installed in the middle of the two layers on the left side of the shell 6 at a certain distance from top to bottom, and every two identification modules are installed in the middle of the two layers on the left side of the shell 6. The upper and lower spacing of the module 4 is consistent with the upper and lower spacing of every two power banks 51; the charging contact mechanism 8 has the same number of sets, and the number of sets of the charging contact mechanism 8 is twice the number of power banks 51. Each identification module 4 is installed with a set of charging contact mechanisms 8 at equal intervals at the front and rear ends (several sets of charging contact mechanisms 8 and multiple identification modules 4 are welded from top to bottom on the right side of a rectangular circuit board), and the right side end of the charging contact mechanism The touch ball 81 is located at the right outer end of the left side of the shell 6 (the touch ball 81 is located in the opening at the corresponding position of the shell 6, and the outer diameter of the touch ball 81 is slightly smaller than the inner diameter of the opening, and the touch ball 81 can move left and right along the opening); the rear side of the electric pushing mechanism 7 (motor reduction mechanism) is installed at the lower front end of the rear shell 62, and multiple charging The power bank 51 is put into the shell 6 from the insertion port (the limit groove 511 and the limit block 631 play a limiting role to prevent the power bank from being put into the shell 6 in the wrong direction); after the multiple power banks 51 are put into the shell 6 from top to bottom, the identification chip 513 of each power bank 51 is located at the right end of each identification module 4, and the two metal contacts 514 of each power bank are just in contact with the right front end contact balls 81 of two sets of charging contact mechanisms 8; the two sets of charging contact mechanisms 8 located at the front and rear ends of each identification module are grouped into one group (eight groups in this example), and the multiple groups of charging contact mechanisms 8 are respectively connected to the two ends of the power output of the charging circuit 2 of the shared power bank body through wires (the connecting wires are located between the inner and outer layers on the left side of the shell 6).

[0023] Figure 1 ,2 As shown in Figures 3, 4, and 5, the outer diameter of the power bank 51 is slightly smaller than the inner diameter of the housing 6 by 1 mm. The outer diameter of the limit block 631 is slightly smaller than the inner diameter of the limit groove 511 at the lower end of the power bank by 0.3 mm. The identification surface of each identification module 4 and the left and right outer ends of the housing 6 are in a vertical plane, and the spacing between each identification module 4 and the front and rear sets of charging contact mechanisms 8 and the identification chip 513 in the middle of the left end (relative position) of each power bank, and the two metal contacts 514 (outer diameter 5 mm) at the front and rear ends of the chip are in a straight line horizontally. Each set of charging contact mechanism (copper material) includes a sleeve 82, a spring 83, and a cylindrical movable rod 84. The left end of the sleeve 82 is horizontally welded on the circuit board, the spring 83 is located in the left end of the sleeve 82, the left end of the movable rod 84 is located in the sleeve 82, the outer diameter of the right end of the movable rod 84 is smaller than the outer diameter of the left end, and an isolation plate 85 with an opening in the middle is welded to the right end of the sleeve 82. The opening is larger than the outer diameter of the right end of the movable rod 84, and a touch ball 81 with an outer diameter larger than the outer diameter of the right end of the movable rod is welded to the rightmost end of the movable rod. The electric pushing mechanism includes multiple rotating wheels 71 (three in this embodiment), a motor reduction mechanism 72, and a rectangular shell 73. The upper end of the shell 73 is an open structure. The front and rear ends of the shell 73 have three shaft holes 731 from left to right. The lower end of the shell of the motor reduction mechanism 72 is longitudinally installed in the front of the lower end of the rear shell 62 through a screw nut. There is a shaft rod 74 on both sides of the front and rear of the middle of the three rotating wheels 71, and the shaft rods 74 at the front and rear ends of two rotating wheels are respectively sleeved in the front and rear shaft holes 731 at the left and right ends of the shell 73. Two rotating wheels 71 are located in the left and right ends of the shell 73, and the shaft rods at the front and rear ends of the third rotating wheel 71 are located in the middle shaft holes 731 at the front and rear ends of the shell 73. The rear end shaft rod of the third rotating wheel 71 is located in the middle of the rear outer end of the shell and is welded to the front side power output shaft of the motor reduction mechanism 72. The shell 72 and the rotating wheels 71 of the electric pushing mechanism are located at the lower end of the shell 6. Each of the three rotating wheels 71 of the electric push mechanism has longitudinal spur teeth 75 distributed in an annular pattern on its surface. The three rotating wheels 75 have the same outer diameter. The upper ends of the three rotating wheels 71 are in a plane, and the surface spur teeth 75 mesh with the spur teeth 512 at the lower end of the power bank. The upper ends of the three rotating wheels 75 are higher than the upper end of the housing 73 (a power bank 51 at the lower end of the housing is located at the upper ends of the three rotating wheels 75, and the front-to-back length of the three rotating wheels 75 is slightly less than the front-to-back length of the housing 6 by 1 cm). The lower end height of the push-out port 64 of the housing is slightly lower than the upper end height of the rotating wheel 71.

[0024] Figure 1 , 2As shown in Figures 3, 4, and 5, the other principles and processes of the present invention are completely consistent with the existing shared power banks, and the present invention does not make any changes. In the present invention, each time the charger puts the power bank 51 into use from the upper input port 63 at the right end of the shell after charging, due to the limiting effect of the limiting groove 511 and the limiting block 631, the power bank 51 must be put into the shell in one direction, ensuring that the power bank 51 can fall into the shell 6. The subsequent identification module 4 recognizes the chip of the power bank 51 after charging and the charging needs of the power bank 51. When each power bank 51 is put into the shell 6, due to the gravity of the power bank 51 itself and the inner diameter of the shell 6 is slightly larger than the outer diameter of the power bank 51, each power bank 51 can be placed horizontally from top to bottom in the shell 6, and the identification chip 513 on the left side of each power bank 51 will be close to the identification surface of an identification module 4 at the left end of the shell (with a spacing of 2mm), and the metal contact pieces 514 at the front and rear ends of the left side of each power bank will contact the right sides of the two contact balls 81 of the two sets of charging contact mechanisms (all made of copper material) in a straight line. In this way, the charging circuit 2 in the shared power bank body will automatically charge each charging contact mechanism through each two sets of charging contact mechanisms. The power bank 51 is charged (the part below the radius of the touch ball 81 is only 1.5mm from the outer end of the left right side of the shell. Because it is a smooth spherical surface, when the power bank 51 is placed in the shell 6, it will push the touch ball 81 to overcome the elastic force of the spring 83 and move to the left along the sleeve 82 through the movable rod 84, ensuring that multiple power banks 51 can fall into the shell 6 from top to bottom. After the power bank 51 is located in the shell 6, under the elastic force of the spring 83, the touch ball 81 will move to the right along the sleeve 82 through the movable rod 84 and contact the metal contact piece 514 at the left end of the power bank, ensuring that the power output by the charging circuit 2 can charge the power bank 51). After multiple power banks 51 are placed in the shell 6, the power bank 51 at the lower end is located at the upper end of the three rotating wheels 71 and is horizontally in a straight line with the ejection port 64.

[0025] Figure 1 , 2As shown in Figures 3, 4, and 5, in actual use of the present invention, a charger who needs to use a power bank scans the QR code 1 with a mobile phone and establishes a connection with the device. The control circuit 3 in the shared power bank body 5 outputs positive and negative polar power for a certain period of time (6 seconds) and enters the power input ends of the motor reduction mechanism 72. As a result, the motor reduction mechanism 72 is powered and its power output shaft drives the middle rotating wheel 71 in the shell 73 to rotate clockwise. Since there are spur teeth 75 at the upper end of the rotating wheel 71 and the spur teeth 75 are meshed with the spur teeth 512 at the lower end of each power bank 51, the rotating rotating wheel 51 will push a power bank 51 at the lower end of the shell 6 out of the right end of the shell 6 through the push-out port 64, so that the charger can use the charged power bank 51. After charging, the charger puts the power bank 51 into the housing 6. When the distance between one of the identification modules 4 and the identification chip 513 of the power bank 51 is close, the identification module 4 identifies the identification chip 513 in the middle of the left end of the power bank, obtains the corresponding power bank information, and then sends the corresponding power bank return time information to the cloud. After the third-party application software deducts the fee on time, the charger completes the entire process of using and returning the power bank. The multiple power banks 51 of the present invention can be placed in the housing 6 from top to bottom without gaps, and all the power banks 51 are pushed out by a unified electric pushing mechanism 7 (the rotating wheels at the left and right ends of the housing 73 are pushed out to the outer end of the power bank 51, and the rotating wheels follow the shaft rod to support the power bank 51). There is no need to use an electromagnetic push rod mechanism that is the same as the number of power banks 51, so the installation space is greatly saved. The overall structure is compact and small in size, and can be placed and used in a relatively small area, which brings convenience to the user. The present invention can push out the power bank 51 through the electric push mechanism 7, which makes it more convenient for the charger to take out the power bank 51. When returning the power bank, the charger 51 can be directly put into use through the upper end of the shell side without using external force, which brings convenience to the charger (eight power banks 51 are stacked together at a low height, and will not be damaged when placed in the shell from top to bottom). The present invention also improves the market competitiveness of the product and can bring good economic benefits to the producer. The motor reduction mechanism is a finished product of a coaxial output DC motor gear reducer with a working voltage of 12V DC and a power of 10W (model GA12-N20).

[0026] The main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0027] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A shared power bank device, comprising a power bank body and a housing, characterized in that: It also has an electric pushing mechanism and a charging contact mechanism; the power bank body is matched with multiple power banks, and the lower end of the shell of each power bank has a limit groove horizontally, and the lower end of each power bank has a plurality of straight teeth at a spacing distance; the lower rear end of the shell has a rear shell, and the charging circuit and control circuit of the power bank body are installed in the rear shell; the upper end of one side of the shell has an input port, the lower end of the input port has a limit block, and the lower part of one side of the shell has a push port; the other side of the shell has a double-layer structure, and the multiple identification modules of the power bank body are installed in the double-layer structure on the other side of the shell at a spacing distance from top to bottom, and the upper and lower spacing between every two identification modules is consistent with the upper and lower spacing between every two power banks; the charging contact mechanism has the same multiple sets of charging contacts, The number of sets of mechanisms is twice the number of power banks, and a set of charging contact mechanisms is installed at equal distances at the front and rear ends of each identification module; the rear part of the electric pushing mechanism is installed on the front side of the lower end of the rear shell body, and multiple power banks are put into the shell body from the input port; the identification chip of each power bank is located at the side end of each identification module, and the two metal contacts of each power bank are in contact with the contact balls of two sets of charging contact mechanisms; the two sets of charging contact mechanisms located at the front and rear ends of each identification module are grouped together, and multiple sets of charging contact mechanisms are respectively electrically connected to the two ends of the charging circuit power output of the shared power bank body; the outer diameter of the power bank is smaller than the inner diameter of the shell body; the outer diameter of the limit block of the input port is smaller than the inner diameter of the limit groove at the lower end of the power bank; each identification The spacing between the identification module and the front and rear sets of charging contact mechanisms and each power bank identification chip and the two metal contacts at the front and rear ends are horizontally in a straight line; each set of charging contact mechanisms includes a sleeve, a spring, and a movable rod. One side end of the sleeve is horizontally installed on the circuit board, the spring is located in one side end of the sleeve, one side end of the movable rod is located in the other side of the sleeve, and the other side of the sleeve has an isolation plate with an opening at the outer end, the opening is larger than the outer diameter of the other side of the movable rod, and there is a touch ball at the other end of the movable rod; the electric pushing mechanism includes multiple rotating wheels, a motor reduction mechanism, and a shell. The upper end of the shell is an open structure, and the front and rear ends of the shell have multiple axial holes from left to right. The lower end of the shell of the motor reduction mechanism is longitudinally installed in the front part of the lower end of the rear shell. There is an axle on each side of the front and rear middle part of the wheel, wherein the front and rear end axles of two rotating wheels are respectively sleeved in the front and rear axle holes at the left end and the right end of the shell, the front and rear end axles of the third rotating wheel are located in the middle axle holes at the front and rear ends of the shell, the rear end axle of the third rotating wheel is located in the middle of the rear outer end of the shell and is installed together with the front side power output shaft of the motor reduction mechanism, the shell and the rotating wheel of the electric pushing mechanism are located at the lower end of the shell; each rotating wheel of the electric pushing mechanism has longitudinal spur teeth distributed in an annular manner on the surface of each rotating wheel, the upper ends of the multiple rotating wheels are in a plane, and the surface spur teeth are meshed with the spur teeth at the lower end of the power bank, the upper end height of the multiple rotating wheels is higher than the upper end height of the shell; the lower end height of the push-out port of the shell is lower than the upper end height of the rotating wheel.

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