CN-224203691-U - Safe USB flash disk with hardware isolation function

CN224203691UCN 224203691 UCN224203691 UCN 224203691UCN-224203691-U

Abstract

The utility model discloses a safe USB flash disk with a hardware isolation function, and aims to solve the problem that the USB flash disk in the prior art is not easy to read and write in a targeted manner according to the type of a computer. According to the utility model, through the USB flash disk shell, the interface, the singlechip, the relay, the serial port module, the storage unit and the like, the interface, the relay and the singlechip are matched, and the serial port custom protocol is utilized to verify and identify the host computer software computer, so that the possibility of connecting the USB flash disk with the Internet is avoided, the isolation effect of the USB flash disk on the internal and external network parts is realized, the virus infection of the USB flash disk is effectively avoided, and meanwhile, the connection effect of the serial port module and the normally closed node of the relay is utilized, so that the problem of storage data communication of the USB flash disk in the plugging process of the common computer end is further avoided, and the isolation effect of the USB flash disk among different hardware is further realized.

Inventors

SHEN QIANG
HU HANFENG
JIA JIANXIN
ZHANG HONGCHUAN
LI XIA
LI XING
SUN BIAO

Assignees

中国铁路呼和浩特局集团有限公司科研所

Dates

Publication Date: 20260505
Application Date: 20250606

Claims (7)

1. Safe type USB flash disk with hardware isolation function, its characterized in that includes: the USB flash disk comprises a USB flash disk shell, an interface is arranged at the front end of the USB flash disk shell, a singlechip, a relay, a serial port module and a storage unit are respectively arranged in the USB flash disk shell, four pins are respectively arranged on the interface, two paths of public ends of the interface and the relay are electrically connected, the storage unit is electrically connected with a normally open node of the relay, the serial port module is electrically connected with a normally closed node of the relay, and an IO end and a GND end of the singlechip are respectively electrically connected with an anode and a cathode of a coil on the relay.
2. The safe USB flash disk with the hardware isolation function of claim 1, wherein the singlechip is in data communication with the upper computer software through an interface, and serial port custom protocol is adopted between the singlechip and the upper computer software for data interaction.
3. The safe USB flash disk with the hardware isolation function according to claim 1, wherein a bump is fixed on one side, close to the interface, of the top end of the USB flash disk shell, a mounting groove is communicated between the bump and the USB flash disk shell, an isolation assembly is arranged at one end, close to the interface, of the mounting groove, a special-shaped hole is formed in the top of the other end of the mounting groove, and an adjusting assembly is detachably mounted in the special-shaped hole.
4. The safe USB flash disk with hardware isolation function according to claim 3, wherein the isolation assembly comprises a sliding shaft which is slidably arranged in the mounting groove, the sliding direction of the sliding shaft is parallel to the length direction of the interface, a semicircular baffle is fixedly sleeved outside the sliding shaft, one end of the semicircular baffle extends to the outside of the USB flash disk shell, the front end of the semicircular baffle is positioned above the interface, a gear is fixedly sleeved outside the sliding shaft above the semicircular baffle, the top end of the sliding shaft extends to the inside of the protruding block, and clamping grooves are symmetrically formed in the top end of the sliding shaft.
5. The safe USB flash disk with the hardware isolation function of claim 4, wherein a spring is fixed at one side, close to the interface, of the inside of the protruding block, a top plate is fixed at one end of the spring, the top plate is connected with the inner wall of the protruding block in a sliding mode, the inner side of the top plate is propped against the outer wall of the sliding shaft, a clamping block is fixed at one side, opposite to the top plate, of the inside of the protruding block, and the outer shape and the size of the clamping block are matched with the inner shape and the size of the clamping groove.
6. The USB flash disk with hardware isolation function of claim 4, wherein the adjusting assembly comprises a rotating key rotatably mounted in a groove at the bottom of the mounting groove, a cam is fixedly sleeved outside the adjusting assembly, teeth are uniformly mounted at the protruding end of the cam, and the teeth are meshed with the outer part of the gear.
7. The safe USB flash disk with the hardware isolation function of claim 6, wherein the rotating key and the groove at the bottom of the mounting groove are detachably mounted, the teeth are distributed on the cam in a semicircular arc shape at equal intervals, and the teeth drive the gear to rotate 180 degrees.

Description

Safe USB flash disk with hardware isolation function Technical Field The utility model relates to the technical field of USB flash disks, in particular to a safe USB flash disk with a hardware isolation function. Background The USB flash disk is a miniature high-capacity mobile storage product which uses a USB interface and does not need a physical driver, and the USB flash disk is required to be separated from an internal network USB flash disk and an external network USB flash disk for use in confidential file storage of part enterprises, namely, a computer which is not connected with any network is used for carrying out data storage transmission in cooperation with the USB flash disk, or upper computer software is used for controlling the reading and writing of the USB flash disk, so that the invasion of external network viruses is avoided when the USB flash disk stores data, and the risk of disclosure is reduced. However, in the existing control process of the upper computer software, a USB flash disk is not matched with the upper computer software in a targeted manner, but a USB flash disk which is universal in the market is adopted, and the USB flash disk cannot be read and written on a computer provided with the upper computer software, but can be read and written normally in other occasions without the upper computer software, so that the risk of virus infection exists, and therefore, a certain improvement space exists. Disclosure of utility model The utility model aims to solve the technical problem that the USB flash disk in the prior art is not easy to read and write according to the type of a computer, and therefore, the utility model provides a safe USB flash disk with a hardware isolation function. The safe USB flash disk with the hardware isolation function comprises a USB flash disk shell, wherein an interface is arranged at the front end of the USB flash disk shell, a single-chip microcomputer, a relay, a serial port module and a storage unit are respectively arranged in the USB flash disk shell, four pins are respectively arranged on the interface, two paths of public end telecommunication of the interface and the relay are connected, the storage unit is in telecommunication connection with a normally open node of the relay, the serial port module is in telecommunication connection with a normally closed node of the relay, and an IO end and a GND end of the single-chip microcomputer are respectively in telecommunication connection with the anode and the cathode of a coil on the relay. Preferably, the singlechip performs data communication with the upper computer software through an interface, and the singlechip and the upper computer software perform data interaction by adopting a serial port custom protocol. Preferably, one side of the top end of the USB flash disk shell, which is close to the interface, is fixed with a bump, a mounting groove is communicated between the bump and the USB flash disk shell, one end of the mounting groove, which is close to the interface, is provided with an isolation assembly, the top of the other end of the mounting groove is provided with a special-shaped hole, and an adjusting assembly is detachably arranged in the special-shaped hole. Preferably, the isolation assembly comprises a sliding shaft which is slidably mounted in the mounting groove, the sliding direction of the sliding shaft is parallel to the length direction of the interface, a semicircular baffle is fixedly sleeved outside the sliding shaft, one end of the semicircular baffle extends to the outer portion of the USB flash disk shell, the front end of the semicircular baffle is located above the interface, a gear is fixedly sleeved outside the sliding shaft above the semicircular baffle, the top end of the sliding shaft extends to the inner portion of the protruding block, and clamping grooves are symmetrically formed in the top end of the sliding shaft. Preferably, a spring is fixed at one side of the inside of the lug, which is close to the interface, a top plate is fixed at one end of the spring, the top plate is in sliding connection with the inner wall of the lug, the inner side of the top plate is propped against the outer wall of the sliding shaft, a clamping block is fixed at one side of the inside of the lug, which is opposite to the top plate, and the outer shape and the size of the clamping block are matched with the inner shape and the size of the clamping groove. Preferably, the adjusting component comprises a rotating key which is rotatably arranged in a groove at the bottom end of the mounting groove, a cam is fixedly sleeved outside the adjusting component, teeth are uniformly arranged at the protruding end of the cam, and the teeth are meshed with the outer part of the gear. Preferably, the rotary key and the groove at the bottom of the mounting groove are detachably mounted, teeth are distributed on the cam in a semicircular arc shape at equal intervals, and the teeth drive