There is the charging wall three-pin socket of USB
[technical field]
The utility model relates to USB socket field, particularly relates to a kind of three-pin socket of the USB of having charging wall.
[background technology]
USB charging wall three-pin socket more can meet modern's need for electricity in power supply combination than conventional wall socket.USB charging wall three-pin socket, integrated common power socket and USB supply socket, combine Alternating Current Power Supply and direct current supply, can be ordinary appliances and USB interface electric power supply simultaneously.
USB charging wall three-pin socket, convenient modern's electrification life.Now, a large amount of mini electrical equipments, for example mobile phone, camera and mobile entertainment product, all to adopt USB interface charging, need external transducer or practical special charging device, and the application of USB charging wall three-pin socket just can be saved these conversion equipments, meets very much modern life needs, make charging more easy and convenient, can save many troubles.
USB charging wall three-pin socket in the market; the direct current that is directly converted into 5V by the alternating current of 220V through voltage conversion circuit is exported from USB interface, does not have automatic protection functions, when output current is excessive; likely make the electronic equipment of charging damage, more serious also may breaking out of fire.
[summary of the invention]
The utility model is intended to address the above problem, and a kind of simple in structure, easy to use, the charging of the USB with defencive function wall three-pin socket is provided.
For achieving the above object, the charging wall three-pin socket of what the utility model provided have USB, this charging wall three-pin socket comprises cover, base, the cavity being formed by described cover and base, in this cavity, be provided with earth polar frame and circuit board, described cover is provided with USB outlet and three-pin socket outlet, described circuit board is provided with USB interface, this USB interface is provided with USB with described cover and exports corresponding, three-pin socket has been set up in described earth polar, this three-pin socket is provided with three-pin socket with described cover and exports corresponding, also comprise and be located at the circuit protection device being connected with USB interface on described circuit board.
Described circuit protection device comprises fuse card, be arranged on the fuse on described fuse card and protect the fuse lid of described fuse.
Described three-pin socket comprises ground pole piece, positive/negative plate, wiring shell fragment and protects shutter, the shutter spring of this three-pin socket.
Described circuit board is provided with alterating and direct current voltage conversion circuit.
Described earth polar is set up multiple binding posts and is located at the lock screw of locking electric wire on binding post.
Contribution of the present utility model is; it efficiently solves existing USB charging wall three-pin socket and does not have defencive function; in use; because electric current is excessive; the electronic equipment of charging is damaged, the problems such as more serious also possibility breaking out of fire, circuit board of the present utility model is provided with the circuit protection device being connected with USB interface; when electric current is excessive, automatic shutdown circuit.Of the present utility model have USB charging wall three-pin socket except design ingenious, stablizes in addition excellent quality, can be applied in various public affairs, private occasion, and office building, hotel, villa, apartment and common household all can adopt.The installation of USB charging wall three-pin socket is simple, identical with common socket mounting means, all can be arranged on the position such as wall or desktop.
[brief description of the drawings]
Fig. 1 is front view of the present utility model.
Fig. 2 is exploded perspective view of the present utility model.
[embodiment]
As shown in Figure 1 and Figure 2, the charging wall three-pin socket of the USB of having of the present utility model comprises cover 1, base 2, earth polar frame 3 and circuit board 4.Cover 1 and base 2 snap together, the airtight cavity of its inner formation, and earth polar frame 3 and circuit board 4 are arranged in this closed cavity.The features such as cover 1 and base 2 adopt PC material, and it is high that PC material has toughness, does impulsive force, and fire resistance is strong.Cover 1 is provided with USB outlet 11, mains switch outlet 12, fuse outlet 13 and three-pin socket outlet 14.USB outlet 11 can be one or more, and multiple USB outlets 11 are the setting of horizontal or vertical interval, its between left and right every the middle part that is arranged in cover 1.In the present embodiment, USB outlet 11 is one.Earth polar frame 3 is provided with three-pin socket, and this three-pin socket and cover 1 are provided with three-pin socket and export 14 correspondingly, and circuit board 4 is provided with USB interface 41, and this USB interface 41 and cover 1 are provided with USB and export 11 corresponding.In the present embodiment, USB interface 41 is one.
As shown in Figure 2, on circuit board 4, be provided with the circuit protection device being connected with USB interface 41.Circuit protection device comprises that circuit protection device comprises fuse card 51, fuse 52 and fuse lid 53.Fuse card 51 is welded on circuit board 4; fuse 52 is known glass tube fuse; glass tube fuse two ends are connected on the two ends sheet metal of fuse card 51; at glass tube fuse surface installation insurance wire cover 53, this fuse lid 53 plays a protective role to glass tube fuse.It is 13 corresponding that the fuse that fuse lid 53 is provided with cover 1 exports.Circuit protection device connects USB interface 41, works as current overload, and fuse 52 fuses automatically, and whole circuit is played a protective role, and prevents fire.Circuit board 4 is provided with voltage conversion circuit, and the direct current that makes the alternating current of 220V be converted into 5V through voltage conversion circuit is exported from USB interface 41.
As shown in Figure 2, frame 3 tops in earth polar are provided with four and are spaced wiring terminal 31 and the locking wire screw 32 corresponding with binding post 31.Be provided with to lower counterbore at binding post 31 upper surfaces, on a side of binding post 31, be provided with screw hole.Be provided with wiring hole in base 2 bottoms, the electric wire of access civil power is inserted in the counterbore of binding post 31 through after the wiring hole of base 2 bottoms, at screw hole lock screw 32, electric wire is fixed on binding post 31.At earth polar frame 3 middle parts, two mains switches 33 are installed, this mains switch 33 and cover 1 be provided with mains switch export 12 corresponding, closed electrical source switch 33, the conducting of USB output circuit, disconnecting power switch 33, the disconnection of USB output circuit.
As shown in Figure 2, three-pin socket can directly provide electric energy for alternating-current installation/AC installation, and three-pin socket comprises ground pole piece 61, positive/negative plate 62, wiring shell fragment 65, shutter 63 and shutter spring 64.External three-pin plug is just corresponding with ground pole piece 61, positive/negative plate 62.Ground pole piece 61, positive/negative plate 62, wiring shell fragment 65 use high-quality tin-phosphor bronze, have intensity high, and good springiness is indeformable, electric conductivity high.Ground pole piece 61 is for earth connection, and shutter 63 prevents that one pole from inserting, protection safety, and door spring 64 can make shutter 63 set back.
In use, data wire one end is inserted in the data line interface of electronic equipment of the needs chargings such as mobile phone, data wire other end USB interface is inserted in the USB interface in cover 1, the mains switch 33 corresponding with using USB on closed cover 1, alternating current is through wiring board step-down conversion process, output 5V direct current, realize electronic equipment chargings such as mobile phones, after having charged, disconnect cover 1 power source switch 33, then pull up data wire.
In the time using three-pin socket, directly the three-pin plug of ac electric apparatus is inserted in three-pin socket, closed corresponding mains switch 33, just can use alternating current equipment.
Although the utility model is disclosed by above embodiment; but protection range of the present utility model is not limited to this; do not departing under the condition of the utility model design, distortion, the replacement etc. that above each member is done all will fall within the scope of claim of the present utility model.