usb（通(tong)用(yong)串行總線英語：Universal Serial Bus）插頭(tou)用(yong)于(yu)規(gui)范電(dian)腦與外部設備的(de)連接和通(tong)訊(xun)，是(shi)一種特殊的(de)插頭(tou)，多用(yong)于(yu)數(shu)碼電(dian)子產品，常見的(de)USB插頭(tou)厚度是(shi)4.5mm左(zuo)右(you)。

usb插(cha)座(zuo)(zuo)是一(yi)種(zhong)安全節電(dian)(dian)、帶USB接(jie)口(kou)的(de)(de)通(tong)用(yong)(yong)(yong)(yong)插(cha)座(zuo)(zuo)，包括插(cha)座(zuo)(zuo)主(zhu)體(ti)，在(zai)(zai)所(suo)(suo)述(shu)插(cha)座(zuo)(zuo)主(zhu)體(ti)上(shang)設有(you)(you)USB母座(zuo)(zuo)，在(zai)(zai)所(suo)(suo)述(shu)usb母座(zuo)(zuo)上(shang)設有(you)(you)聯(lian)動開(kai)(kai)(kai)關和usb插(cha)口(kou)；在(zai)(zai)所(suo)(suo)述(shu)插(cha)座(zuo)(zuo)主(zhu)體(ti)內設有(you)(you)充電(dian)(dian)器模(mo)塊，所(suo)(suo)述(shu)充電(dian)(dian)器模(mo)塊的(de)(de)輸(shu)入(ru)端(duan)與所(suo)(suo)述(shu)聯(lian)動開(kai)(kai)(kai)關的(de)(de)輸(shu)出端(duan)并(bing)聯(lian)，其輸(shu)出端(duan)的(de)(de)正負極與usb插(cha)口(kou)的(de)(de)電(dian)(dian)源(yuan)端(duan)的(de)(de)正負極對應聯(lian)接(jie)，所(suo)(suo)述(shu)聯(lian)動開(kai)(kai)(kai)關的(de)(de)輸(shu)入(ru)端(duan)與電(dian)(dian)源(yuan)連接(jie)。本實用(yong)(yong)(yong)(yong)新型將(jiang)多個usb插(cha)口(kou)附加于通(tong)用(yong)(yong)(yong)(yong)開(kai)(kai)(kai)關上(shang)，并(bing)且使(shi)usb插(cha)座(zuo)(zuo)只(zhi)在(zai)(zai)需要(yao)用(yong)(yong)(yong)(yong)電(dian)(dian)時才(cai)與市電(dian)(dian)接(jie)通(tong)，這樣不僅具有(you)(you)只(zhi)需用(yong)(yong)(yong)(yong)usb插(cha)線將(jiang)用(yong)(yong)(yong)(yong)低壓用(yong)(yong)(yong)(yong)電(dian)(dian)器與通(tong)用(yong)(yong)(yong)(yong)開(kai)(kai)(kai)關上(shang)的(de)(de)usb插(cha)口(kou)連接(jie)即可給用(yong)(yong)(yong)(yong)低壓用(yong)(yong)(yong)(yong)電(dian)(dian)器充電(dian)(dian)的(de)(de)優點，而且還(huan)具有(you)(you)使(shi)設備(bei)不會(hui)長(chang)(chang)期(qi)接(jie)通(tong)電(dian)(dian)源(yuan)，延長(chang)(chang)設備(bei)壽命，節省電(dian)(dian)力(li)、消(xiao)除隱患的(de)(de)優點。