Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a power bank, comprising a power bank housing (4), a charging panel (2), a cover plate (1) and a junction box (3), wherein the power bank housing (4) is internally provided with a power supply cavity (41) for placing a charging power supply; the charging panel (2) is mounted over the power bank housing (4); the cover plate (1) is mounted over the charging panel (2); the charging panel (2) is provided with an object placing cavity (22), a charging port (23) and a USB port (24); the junction box (3) is detachably mounted below the charging panel (2); and the junction box (3) is internally provided with a USB connector mounting cavity (32) for mounting a USB connector and a charging connector mounting cavity (33) for mounting a charging connector, with the USB connector mounting cavity (32) being in communication with the USB port (24), and the charging connector mounting cavity (33) being in communication with the charging port (23). The power bank having the object placing cavity (22) provided on the charging panel (2) thus achieves the basic function of charging, while also providing the function of placing small articles, in particular, cards such as business cards, and makes it convenient to take and place same.
A: A hinged-lid electronic cigarette charger, comprising an upper casing (1) and a lower casing (15), a charging device for charging an electronic cigarette being provided in the lower casing; the upper casing and the lower casing is hinged by means of a hinge device; a first magnetic device (2) is provided in the upper casing; a second magnetic device (11) is provided in the lower casing; and when the upper casing is closed on the lower casing, the first magnetic device and the second magnetic device are attracted. The hinged-lid electronic cigarette charger can prevent a lid of said charger from opening during the process of charging the electronic cigarette, avoiding instances of poor contact between the electronic cigarette and said charger.
B: Provided by the present application are a candle lamp charging apparatus (1) and a candle lamp (2); the candle lamp charging apparatus comprises a housing (11), a light energy collecting plate (12), and a charging connector (13); an accommodating cavity (100) used for accommodating the candle lamp is formed inside the housing; the side wall of the housing is provided with a placement and removal opening (110) used for access to the candle lamp; the light energy collecting plate is disposed on the side wall of the housing, and faces away from the placement and removal opening; the charging connector is disposed protruding on the inner surface of the bottom wall of the housing, and is electrically connected to the light energy collecting plate; the bottom of the candle lamp is provided with a charging interface (20) used for sleeving to the charging connector; the candle lamp is internally provided with a rechargeable battery, a control circuit board, and a light-emitting element. The present application provides a candle lamp charging apparatus which converts light energy into electrical energy by means of the light energy collecting plate, and electrical energy is supplied to the candle lamp by means of the charging connector, enabling the built-in rechargeable battery of the candle lamp to be charged when the power is low, thus achieving reuse.
C: A family-type mini flashlight structure, relating to the technical field of flashlights. The flashlight comprises a cylindrical body (5); a magnetic sticker (2) facilitating magnetic fixation and a slip-resistant layer (4) facilitating gripping are provided on the body (5); one end of the body (5) is rotatably connected to a front cover (1) by means of a connecting block (9), and led lamp beads are provided in the front cover (1); a storage battery is provided in the body (5), the storage battery and the led lamp beads are connected to wires by means of a button (3), and the button (3) is provided on the body (5); one end of the body (5) away from the front cover (1) is provided with an ultraviolet lamp (7), a USB charging interface (6), and a charging port (8); the ultraviolet lamp (7), the USB charging interface (6), and the charging port (8) are connected to the storage battery by means of the wires. The magnetic sticker (2) is provided on the body (5) so as to facilitate fixing the flashlight, the ultraviolet lamp (7) can perform ultraviolet irradiation for fake currency detection, and the function is no longer single; moreover, the storage battery is connected to the USB charging interface (6), so that the flashlight structure cannot only be used as a flashlight but can also be used as a power bank.
D: Disclosed is a structure for a multi-functional Bluetooth speaker, the structure comprising a charging base (1), a speaker main body (2), and an LED lamp body (3), wherein a base casing (11) of the charging base (1) comprises a lower base casing (111) and an upper base casing (112), a base accommodation cavity (12) of the base casing (11) is embedded with a first PCB circuit board (13) and at least two automatic winders (14), an outer surface of the base casing (11) is provided with a power supply input interface (15), each automatic winder (14) is respectively wound with a charging connection line, and an external pulling end part of each charging connection line is respectively provided with a USB charging connector (16); a speaker casing (21) of the speaker main body (2) comprises a lower speaker casing (211) and an upper speaker casing (212), wherein a speaker accommodation cavity (22) of the speaker casing (21) is embedded with a second PCB circuit board (23) and a speaker (24), and the second PCB circuit board (23) is provided with a Bluetooth module; and the LED lamp body (3) comprises a lamp base (31) and a light-transmissive lamp cover (32), wherein the lamp base (31) is screwed on a third PCB circuit board (33), and the third PCB circuit board (33) is provided with LED lamp beads (34). By means of the above-mentioned structural design, the Bluetooth speaker has the advantages of having novel structural design, having various functions, and being convenient to use.
Answer: A