USB integrated waterproof and USB elastic sheet contact type charging device
By integrating the USB port with the housing through injection molding and using spring-loaded contact for electrical conduction, the problems of complex welding between the USB port and the main PCB board and poor waterproofing in existing charging devices have been solved, achieving intelligent manufacturing, cost reduction and efficiency improvement, and durable and reliable waterproofing.
Patent Information
- Application Number
- CN202520037969.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing charging devices use manually soldered cables, and the waterproof structure between the casing and the USB port is complex. The manufacturing process for devices using glue or sealing rings is complex, leading to long-term reliability issues. Furthermore, the waterproofing effect of glue or sealing rings is poor.
The USB connector and the housing are integrally injection molded. The USB connector and the USB circuit board are electrically connected by a spring contact to achieve contact-type electrical conduction. Combined with the integral molding of the plastic part and the housing, the welding problem between the USB connector and the main PCB board is solved, and the durability and reliability of the waterproof effect are improved.
Intelligent manufacturing between the USB connector and the main PCB board was achieved, reducing labor costs, simplifying the manufacturing process, improving the durability and reliability of the waterproof structure, and achieving an IPX7 waterproof rating.
Smart Images
Figure CN223729100U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of charging device especially relates to a USB integrated molding waterproof and USB spring piece contact type charging device. BACKGROUND
[0002] The charging device of electronic product usually includes shell, USB interface, main PCB board, input interface, input interface connects external power socket, introduces commercial power into the inside of charging head, and the main PCB board includes internal circuit such as rectifier circuit, filter circuit, transformer, switching power supply circuit etc., and the USB interface is output interface for connecting charging equipment, and common USB-A interface, USB-C interface, Micro-USB interface, Lightning interface etc. are usually used. The electrical connection between the USB interface and the main PCB board in the common charging device is manually welded by wire, and the manufacturing process is complex, and the cost is high. The waterproof structure between the shell and the USB interface is mainly completed by glue or sealing ring after the electrical connection between the USB interface and the main PCB board, and if IPX7 waterproof effect is achieved, additional waterproof process is needed, and the long-term reliability of the waterproof method of glue or sealing ring is poor. SUMMARY
[0003] The utility model discloses a kind of USB integrated molding waterproof and USB spring piece contact type charging devices, including shell and machine board, the shell has USB part, the shell and the USB part are integrally injection molded, the USB part includes USB interface and USB circuit board, contact finger is provided on the USB circuit board, the machine board has electrically connected spring piece, the electrically connected spring piece and the contact finger form spring piece contact type electrically conductive.
[0004] The utility model provides a kind of USB integrated molding waterproof and USB spring piece contact type charging device, including shell and machine board, the shell has USB part, the shell and the USB part are integrally injection molded, the USB part includes USB interface and USB circuit board, contact finger is provided on the USB circuit board, the machine board has electrically connected spring piece, the electrically connected spring piece and the contact finger form spring piece contact type electrically conductive.
[0005] Preferably, the USB interface is Type A and / or Type C.
[0006] Preferably, the electrically connected spring piece is arranged in the socket for contacting the USB circuit board.
[0007] Preferably, the machine board is provided with a fixing plate, and the electrically connected spring piece is arranged on the fixing plate.
[0008] As preferably, the USB circuit board and the contact finger are arranged parallel to the machine plate, and the electrically connecting spring is arranged on a surface parallel to the machine plate.
[0009] As preferably, the USB circuit board and the contact finger are arranged perpendicular to the machine plate, and the electrically connecting spring is arranged on a surface perpendicular to the machine plate.
[0010] As preferably, the USB part has a plastic wrapping part, which wraps the USB interface and the USB circuit board by an injection molding process, and the plastic wrapping part is integrally injection molded with the shell.
[0011] As preferably, the shell comprises an upper shell cover and a lower shell, and the plastic wrapping part is integrally formed with the upper shell cover.
[0012] As preferably, the shell comprises an upper shell cover and a lower shell, and the plastic wrapping part is integrally formed with the lower shell.
[0013] The utility model has the following beneficial effects relative to the prior art:
[0014] The utility model discloses a USB integrative waterproof and USB spring contact type charging device, including shell and machine plate, the shell has USB part, the shell adopts integrative injection molding with the USB part, the USB part carries out plastic wrapping process first and then integrative with the shell, the waterproof treatment between the shell and the USB part, the manufacturing process complex, long-term reliability bad technical problem of the traditional mode of adopting glue or sealing ring is solved, the USB part includes USB interface and USB circuit board, be provided with contact finger on the USB circuit board, the machine plate has electrically connecting spring, adopt the electrically connecting spring with the contact finger and form the spring contact type electrically conducting mode, the USB interface of traditional charging device and main PCB board adopt wire material and carry out manual welding to cause the technical problem of high artificial cost, process tedious, have intelligent manufacturing feasibility, the beneficial effect of the cost reduction and benefit increasing accessibility and waterproof effect durability reliability. DRAWINGS
[0015] Figure 1 The utility model charging device spring contact type structure and integrative structure schematic diagram are shown.
[0016] Figure 2 The utility model embodiment 1 charging device schematic diagram is shown.
[0017] Figure 3 The utility model embodiment 2 charging device schematic diagram is shown.
[0018] Figure 4 The utility model upper shell cover and USB part integrative schematic diagram is shown.
[0019] Fig. 1 - machine plate; 11 - electrically connected spring; 2 - USB part; 21 - USB plug interface; 22 - USB circuit board; 221 - contact finger; 23 - plastic coated part; 3 - socket; 4 - fixed plate; 5 - upper shell cover; 6 - lower shell DETAILED DESCRIPTION
[0020] The utility model will be further illustrated in connection with the drawings and specific embodiments.
[0021] Embodiment 1
[0022] Please refer to Figure 1 , Figure 2 and Figure 4 , a USB integrally formed waterproof and USB spring contact type charging device, including shell and machine plate 1, the shell includes upper shell cover 5 and lower shell 6, the shell has USB part 2, the USB part 2 includes USB plug interface 21 and USB circuit board 22, the USB circuit board 22 is provided with contact finger 221, the machine plate 1 is provided with socket 3, the inside of socket 3 is provided with electrically connected spring 11 parallel to the surface of machine plate 1 or perpendicular to machine plate 1, the electrically connected spring 11 has the protruding portion towards USB circuit board 22, and has the pre-pressure to the contact finger 221 on USB circuit board 22, when the USB circuit board 22 is inserted into socket 3, the electrically connected spring 11 is extruded with contact finger 221 and forms spring contact type electrically conductive, the USB plug interface 21 and USB circuit board 22 are coated by plastic coated part 23 and are integrally injection molded with the upper shell cover 5 of shell.
[0023] Further, the USB plug interface 21 is Type A type plug interface.
[0024] Further, the charging device further includes input interface, for connecting external power socket, and introducing mains into the inside of charging device.
[0025] Further, the machine plate 1 is provided with an internal circuit, which includes a rectifier circuit, a filter circuit, a transformer, a rectifier circuit, a switching power supply circuit, a secondary synchronous rectification circuit, a protocol chip and a protection circuit, etc. The rectifier circuit converts the input alternating current into direct current, and is realized by adopting a diode bridge rectifier and the like, so as to change the alternating current of the mains into pulsating direct current; the filter circuit is composed of capacitors and the like, and is used for smoothing the pulsating direct current after rectification, reducing voltage fluctuation, and making the output direct current voltage more stable. The filter capacitor can store electric charge, and release or absorb electric charge when the voltage fluctuates, so as to achieve the effect of filtering. The transformer is used for transforming the input high-voltage, low-current alternating current into low-voltage, high-current alternating current or direct current suitable for charging mobile phones and the like, and is composed of an input coil, an output coil and a core, and realizes voltage transformation through electromagnetic induction principle. The switching power supply circuit includes switching tubes (such as MOS tubes), control chips and the like, and converts direct current into high-frequency alternating current through control of the conduction and cutoff of the switching tube, and then obtains the required output voltage and current after voltage reduction and the like by the transformer. The secondary synchronous rectification circuit: the synchronous rectification technology can improve the conversion efficiency, and the circuit usually uses a rectification MOS tube and the like to replace the traditional diode for rectification, and reduces the rectification loss. The protocol chip is used for identifying the fast charging protocol supported by the charging device, such as USB PD, QC, FCP, SCP and the like, and communicates with the charging device to negotiate appropriate charging voltage, current and the like, so as to realize fast charging. The protection circuit includes overcurrent protection, overload protection, overvoltage protection, overheat protection and the like. When the charger appears abnormal conditions, such as too large output current, too high voltage, too high temperature and the like, the protection circuit will automatically cut off the power supply to prevent damage to the charging device or cause safety accidents.
[0026] Example 2
[0027] Please refer to Figure 3The utility model provides a USB integrated waterproof and USB spring contact type charging device, including casing and machine board 1, the casing includes upper shell cover 5 and lower casing 6, the casing has USB department 2, USB department 2 includes USB interface 21 and USB circuit board 22, be provided with contact finger 221 on USB circuit board 22, be provided with fixed plate 4 on machine board 1, the fixed plate 4 is arranged in parallel with or perpendicular to machine board 1, be provided with electric connection spring 11 on fixed plate 4, electric connection spring 11 has the protruding portion towards the contact finger 221 of USB circuit board 22, and has the pre -pressure to the contact finger 221 on USB circuit board 22, when USB circuit board 22 and fixed plate 4 assemble, electric connection spring 11 and contact finger 221 extrude and form spring contact type electric conduction, the USB interface 21 and USB circuit board 22 are after the plastic part 23 and the upper shell cover 5 of casing of plastic part 23 and the upper shell cover 5 of casing are integrally injection moulded.
[0028] Further, the USB interface 21 is a Type C interface.
[0029] Further, the charging device further comprises an input interface for connecting an external power socket to introduce mains electricity into the charging device. The machine board 1 is provided with the internal circuit as in embodiment 1.
[0030] In another specific embodiment, the USB part is integrally injection molded with the lower casing 6.
[0031] In the above embodiments, mechanical intelligent production can be used to further achieve the beneficial effect of cost reduction and efficiency improvement.
[0032] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the utility model technical scheme, and the equivalent embodiments with equivalent changes are all within the scope of the utility model technical scheme.
Claims
1. A USB integrally formed waterproof and USB spring contact type charging device, characterized by, The application relates to a USB shell and machine plate (1), the shell is integrally injection molded with a USB part (2), the USB part (2) comprises a USB interface (21) and a USB circuit board (22), the USB circuit board (22) is provided with a contact finger (221), the machine plate (1) is provided with an electrically-conductive spring (11), the electrically-conductive spring (11) is in spring contact with the contact finger (221).
2. The USB integrally formed waterproof and USB spring contact type charging device according to claim 1, characterized in that, The USB interface (21) is a Type A and / or Type C interface.
3. The USB integrally formed waterproof and USB spring contact type charging device according to claim 1, characterized in that, The electrically-conductive spring (11) is arranged in a socket (3) for contacting and conducting the USB circuit board.
4. The USB integrally formed waterproof and USB spring contact type charging device according to claim 1, characterized in that, The machine plate (1) is provided with a fixing plate (4), and the electrically-conductive spring (11) is arranged on the fixing plate (4).
5. The USB integrally formed waterproof and USB spring contact type charging device according to claim 3 or 4, characterized in that, The USB circuit board (22) and the contact finger are parallel to the machine plate (1), and the electrically-conductive spring (11) is arranged on a surface parallel to the machine plate (1).
6. The USB integrally formed waterproof and USB spring contact type charging device according to claim 3 or 4, characterized in that, The USB circuit board (22) and the contact finger (221) are perpendicular to the machine plate (1), and the electrically-conductive spring (11) is arranged on a surface perpendicular to the machine plate (1).
7. The USB integrally formed waterproof and USB spring contact type charging device according to claim 1, characterized in that, The USB part (2) is provided with a plastic-coated part (23), the plastic-coated part (23) is wrapped around the USB interface (21) and the USB circuit board (22) through an injection molding process, and the plastic-coated part (23) is integrally injection molded with the shell.
8. The USB integrally formed waterproof and USB spring contact type charging device according to claim 7, characterized in that, The shell comprises an upper shell cover (5) and a lower shell (6), and the plastic-coated part (23) is integrally formed with the upper shell cover (5).
9. The USB integrally formed waterproof and USB spring contact type charging device according to claim 7, characterized in that, The shell comprises an upper shell cover (5) and a lower shell (6), and the plastic-coated part (23) is integrally formed with the lower shell (6).