Abstract: A wear state online monitoring method and system based on transfer learning and multi-source information fusion are provided. The method includes: separately collecting data of a friction pair to be monitored in a friction and wear testing state and in an on-ship state; performing feature extraction on the data of the friction pair to be monitored; based on the extracted features, performing feature transferring through transfer learning to obtain successfully transferred features; training a random forest model by using the successfully transferred features, and performing wear state monitoring by using the trained random forest model. The application achieves online monitoring of the wear states of the shafting, gearbox, and wear-prone components in marine and aerospace power plants.

Abstract: Disclosed is a mute knob headgear which includes: two rack belts respectively connected to a VR head-mounted display; and a knob assembly provided at one end of the two rack belts away from the VR head-mounted display and in meshing connection with the two rack belts. The knob assembly is configured to adjust the tightness of the two rack belts, and includes a housing and a gear, a rotary wheel, a pawl, and a soft rubber ring provided in the housing. The present application drives the rotation of the gear by rotating the rotary wheel and then drives the rack to adjust the tightness; when rotating, the pawl and the soft rubber ring are in friction fit; when stopping the rotation, they can jam each other to prevent reverse rotation. The cooperation between the soft rubber ring and the pawl does not produce any sound and achieves infinite adjustment.

Abstract: Disclosed are a device for expansion and contraction through rotation of a rotary shaft and a VR headset. The device includes a first connecting housing, a second connecting housing, a third connecting housing, a connecting member and a positioning member. One end of the second connecting housing is rotatably connected to one end of the first connecting housing, and the third connecting housing is provided with a second inclined surface configured to fit a first inclined surface of the second connecting housing. The connecting member is configured to fix the first connecting housing, the second connecting housing, and the third connecting housing. The positioning member is configured to control the second connecting housing and the third connecting housing to avoid deviation when the second connecting housing and the third connecting housing rotate relative to each other. The present application effectively improves the operating comfort for the user.

Abstract: Disclosed is a VR headband having audio, data transmission, and charging functions, and a control circuit. The VR headband includes a headband body and a power storage component, a transmission line, and an earphone integrally disposed on the headband body. The control circuit includes a DSP audio circuit, a data transmission circuit, a charging circuit, and a discharging circuit. The DSP audio circuit is configured to perform signal optimization on audio data inputted by VR glasses; the data transmission circuit is configured to convert a differential signal inputted by a USB-C base on the power storage component; the charging circuit is configured to buck a high voltage inputted by the USB-C base; and the discharging circuit is configured to boost a voltage outputted by the rechargeable battery. The present invention has the advantages of convenient charging, data transmission, and audio reception of the VR glasses.

Abstract: The present application discloses a protective film of electronic terminal configured to be attached to an electronic terminal mounted with a camera and protect a screen of the electronic terminal. The protective film of electronic terminal includes a protective film body and a shielding member. The protective film body is defined with an avoidance hole and an accommodating cavity. The avoidance hole is for avoiding the camera when the protective film body is attached to the electronic terminal and in communication with the accommodating cavity. The shielding member is movably arranged in the accommodating cavity for shielding or not shielding the camera.

Abstract: Disclosed are a device for expansion and contraction through rotation of a rotary shaft and a VR headset. The device includes a first connecting housing, a second connecting housing, a third connecting housing, a connecting member and a positioning member. One end of the second connecting housing is rotatably connected to one end of the first connecting housing, and the third connecting housing is provided with a second inclined surface configured to fit a first inclined surface of the the second connecting housing. The connecting member is configured to fix the first connecting housing, the second connecting housing, and the third connecting housing. The positioning member is configured to control the second connecting housing and the third connecting housing to avoid deviation when the second connecting housing and the third connecting housing rotate relative to each other. The present application effectively improves the operating comfort for the user.

Abstract: Provided is a protection device and a grooming device for pets, in the field of storage articles. The protection devices includes: a mounting case, a protection cover, and a fixing structure. The mounting case is provided with a sliding space extending though two opposite ends thereof for mounting a working assembly. The protection cover is slidably connected to the sliding space. The fixing structure is connected with the mounting case and is used for fixing the protection cover as the protection cover slides to cover the working assembly. When the protection device is not in use, users may hold the mounting case and change the working state of the fixing structure to drive the protection cover to move and cover the working assembly, so that the working assembly is stored to avoid safety issues caused by the exposed working assembly, thereby improving the practicability of the protection device.

Abstract: Disclosed is a hooking device of a VR data cable, configured to hang the VR data cable, including a buffer, a hang assembly, and an adjustment assembly. The buffer is hung on a hook of a ceiling. The hang assembly is configured to hang the VR data cable. One end of the adjustment assembly is connected to the buffer, and the other end of the adjustment assembly is connected to the hang assembly, and the adjustment assembly adjusts a hang height of the VR data cable through elastic expansion and contraction.

Abstract: The present application discloses a VR glasses accessory and a VR glasses assembly. The VR glasses accessory is applied for VR glasses, and the VR glasses have a facing side facing a user's face. The VR glasses accessory includes a main body, a connector and a nose cover. The main body is configured to be arranged on an edge of the facing side and abut against the user's face. The connector is configured to connect the main body to the VR glasses, and the nose cover is arranged on the main body at a position corresponding to the user's nose, to shade at the user's nose. The present application solves a problem that current VR glasses have poor shading effect, resulting in poor gaming experience obtained by VR game players when wearing VR glasses games.

Abstract: The present application discloses a VR glasses accessory and a VR glasses assembly. The VR glasses accessory is applied for VR glasses, and the VR glasses have a facing side facing a user's face. The VR glasses accessory includes a main body, a connector and a nose cover. The main body is configured to be arranged on an edge of the facing side and abut against the user's face. The connector is configured to connect the main body to the VR glasses, and the nose cover is arranged on the main body at a position corresponding to the user's nose, to shade at the user's nose. The present application solves a problem that current VR glasses have poor shading effect, resulting in poor gaming experience obtained by VR game players when wearing VR glasses games.

Abstract: The present application discloses a protective film of electronic terminal configured to be attached to an electronic terminal mounted with a camera and protect a screen of the electronic terminal. The protective film of electronic terminal includes a protective film body and a shielding member. The protective film body is defined with an avoidance hole and an accommodating cavity. The avoidance hole is for avoiding the camera when the protective film body is attached to the electronic terminal and in communication with the accommodating cavity. The shielding member is movably arranged in the accommodating cavity for shielding or not shielding the camera.

Abstract: Disclosed is a hooking device of a VR data cable, configured to hang the VR data cable, including a buffer, a hang assembly, and an adjustment assembly. The buffer is hung on a hook of a ceiling. The hang assembly is configured to hang the VR data cable. One end of the adjustment assembly is connected to the buffer, and the other end of the adjustment assembly is connected to the hang assembly, and the adjustment assembly adjusts a hang height of the VR data cable through elastic expansion and contraction.