Abstract: Embodiments of this application provide a foldable electronic device and a shaft cover assembly. A first middle frame part and a second middle frame part in the foldable electronic device are rotatably connected to each other by using a rotating shaft assembly. The foldable electronic device further includes a flexible circuit board and at least one shaft cover assembly. The shaft cover assembly is rotatably connected to the rotating shaft assembly. The flexible circuit board is fixedly connected to the shaft cover assembly. In a process in which the first middle frame part and the second middle frame part are folded or unfolded relative to each other, the shaft cover assembly moves back and forth relative to the rotating shaft assembly in a thickness direction of the foldable electronic device.

Abstract: A flexible circuit board test device is disclosed. The flexible circuit board test device includes a main clamp, a first rotating shaft arm and a second rotating shaft arm; the first rotating shaft arm and the second rotating shaft arm are rotatably mounted on a first mobile table and a second mobile table through a first main shaft and a second main shaft respectively; the first rotating shaft arm and the second rotating shaft arm each are provided with a sandwich space for simulating a motion space of a flexible circuit board; the first mobile table is provided with a first driving component in transmission connection with the first main shaft, the second mobile table is provided with a second driving component in transmission connection with the second main shaft; and the first rotating shaft arm and the second rotating shaft arm are provided with auxiliary clamps.

Abstract: An electronic device includes a first body, a second body, a middle cover, and a flexible printed circuit. The flexible printed circuit includes a through-shaft section, a reinforcing plate is provided on a surface of the through-shaft section, the reinforcing plate includes a support sheet and a flexible region, and the support sheet is stacked on and fastened to a surface of the through-shaft section. The flexible region is provided on the support sheet or divides the support sheet into a plurality of sheet bodies. The first body and the second body are rotatably connected to two opposite sides of the middle cover, respectively. The flexible printed circuit extends from the first body to the second body, to connect the first body and the second body, and the reinforcing plate is located in the middle cover and is fastened to the middle cover.

Abstract: A waterproof electronic device includes a shell, a first electronic module, a second electronic module, and a flexible printed circuit FPC. A first compartment and a second compartment which are in communication with each other through a through hole are formed in the shell. The through hole is used for the FPC to pass through. The first and second electronic module are arranged in the first and second compartment respectively. The first electronic module is coupled to the second electronic module by the FPC which passes through the through hole. An opening in communication with the through hole is provided on the shell. A magnetic colloidal structure is arranged in the through hole, where the magnetic colloidal structure seals the through hole.

Abstract: A waterproof electronic device includes a shell, a first electronic module, a second electronic module, and a flexible printed circuit FPC. A first compartment and a second compartment which are in communication with each other through a through hole are formed in the shell. The through hole is used for the FPC to pass through. The first and second electronic module are arranged in the first and second compartment respectively. The first electronic module is coupled to the second electronic module by the FPC which passes through the through hole. An opening in communication with the through hole is provided on the shell. A magnetic colloidal structure is arranged in the through hole, where the magnetic colloidal structure seals the through hole.

Abstract: A flexible circuit board test device is disclosed. The flexible circuit board test device includes a main clamp, a first rotating shaft arm and a second rotating shaft arm; the first rotating shaft arm and the second rotating shaft arm are rotatably mounted on a first mobile table and a second mobile table through a first main shaft and a second main shaft respectively; the first rotating shaft arm and the second rotating shaft arm each are provided with a sandwich space for simulating a motion space of a flexible circuit board; the first mobile table is provided with a first driving component in transmission connection with the first main shaft, the second mobile table is provided with a second driving component in transmission connection with the second main shaft; and the first rotating shaft arm and the second rotating shaft arm are provided with auxiliary clamps.

Abstract: The flexible printed circuit assembly includes a flexible printed circuit and a control structure. The control structure includes a transmission member and two reels arranged on the transmission member at an interval. The flexible printed circuit passes between the two reels. The transmission member is configured to drive the two reels to rotate, so that the flexible printed circuit is wound on entire peripheral sides of the two reels. Alternatively, the control structure includes a transmission member, a guide shaft, and a connecting member. The guide shaft is located on a side of the flexible printed circuit. The connecting member has one end arranged on the transmission member and another end connected to the guide shaft. The transmission member is configured to drive the connecting member to drive the guide shaft to move, and the guide shaft is configured to drive the flexible printed circuit to bend.

Abstract: A substrate is placed in a reflow oven, where a solder flux volatilized in the reflow oven is capable of adhering to a surface of the substrate to form a solder flux layer, a thickness of the solder flux layer is detected, and a concentration of the solder flux in the reflow oven is calculated based on the thickness of the solder flux layer.

Abstract: The invention discloses a deuterated camptothecin derivative and its antibody-drug conjugate (ADC), and combines the deuteration technology with camptothecin ADC to discover improved deuterated camptothecin ADC drug, so that it has higher safety and efficacy and can better meet the clinical challenge.

Abstract: A camptothecin drug having a highly stable hydrophilic connecting unit and its conjugate, or its pharmaceutically acceptable salt thereof, including methods for preparation thereof, and its applications in preventing and/or treating cancer. The conjugate can specifically bind to receptors highly expressed in tumor cells. The conjugates have excellent water solubility, stability, and homogeneity, and can be used for preventing and/or treating tumors and/or other diseases.

Abstract: An antenna layer is provided separate from an active layer in a solar cell device based on organic materials, enabling improved energy conversion in the solar cell devices by increasing the efficiency and spectral cross-section for the capture of incident light. The antenna layer may be anthracene or an anthracene derivative, for example. The antenna layer is operable to harvest light and transfer captured excitation energy to the active layer of the solar cell device using an energy transfer mechanism, wherein the charge separation and/or the formation of free carriers takes place. The antenna layer also limits the ultraviolet exposure of the active layer thus extending the operating life of the solar cell. The active layer and the antenna layer of a solar cell device may be independently optimized such that there is an increased spectral range and/or cross-section of light absorption and thus a higher photovoltaic efficiency.