Provided in the present disclosure is a guiderail fixing structure. The guiderail fixing structure comprises: a housing; a transverse fixing component, arranged at the bottom part of the housing, being two mounting stands provided opposite each other, and used for implementing transverse fixing between a guiderail and the housing; and a vertical fixing component, arranged at the bottom part of the housing and within the two mounting stands provided opposite each other, and used for implementing vertical fixing between the guiderail and the housing. The vertical fixing component comprises engaging hooks and an engaging hook part. When the vertical fixing component is employed, the engaging hooks of the vertical fixing component used for engaging are arranged outside of either edge of the guiderail, and the engaging hook part of the vertical fixing component is arranged within the guiderail.

A wall-plate system having a wall-plate adapted to accommodate a printed circuit board assembly (PCBA) coupled with the wall-plate and may comprise a mounting bracket. The PCBA may include one or more chip packages and/or other components that extend into cavities in the mounting bracket after installation, the cavities located on the mounting bracket to accommodate chip packages and/or other components. The wall-plate may include snaps to couple with the mounting bracket, the snaps extending from an interior surface of the wall-plate, the snaps located away from edges of the wall-plate towards a center of the wall-plate. The mounting bracket may comprise openings to couple with a device in a junction box and/or with the junction box. The wall-plate may comprise, e.g., one or more battery mounts and the mounting bracket may have a shape to accommodate extension by the battery mounts into a plane of the mounting bracket.

A terminal block unit for an input/output device of a modular process control system includes two slot elements configured to receive two redundant signal conditioning units. The terminal block unit is configured to be housed in a pair of two adjacent slot elements of a module termination unit of an input/output device. The terminal block unit provides a parallel connection of the redundant signal conditioning units to a field device.

A symmetrical wall-mounted 2-piece cabinet for computer network equipment and in-building communication that can rotate for opening on the left or right by the same mechanism without having to change the pivot point is composed of a front piece functioning as the cabinet for holding computer network equipment, where the front piece of the cabinet has a door that can be opened or closed in accessing equipment from the front, and a back piece in the form of a robust structure functioning to attach the entire structure of the cabinet to the building wall. The invention helps the operator to turn the front piece of the cabinet using the operator's own strength, and reduces limitations in the installation of a cabinet in a wall-mounted fashion in a narrow space or building corner, while also enhancing usage safety and maintaining structural weight balance, which increases the usage life of the wall-mounted cabinet.

This application provides a voltage sampler and a solid-state transformer. The voltage sampler includes a conductive housing, at least one sampling board located inside the housing, and a conducting layer. Each sampling board includes at least two resistors and a voltage input end. The resistors in the sampling board are electrically connected in sequence in the direction from a first end to a second end. The resistor at the first end is electrically connected to the voltage input end. The resistor at the second end is electrically connected to the housing, and the housing is electrically connected to a fixed potential end. The conducting layer is disposed between the at least one sampling board and the housing in the voltage sampler. The conducting layer is electrically connected to a resistor in the sampling board.

A shock resistant body comprises a non-metallic lattice structure having a first region with a first foam density in a first region and a second foam density in a second region that is lower from the first foam density. The first region can have solid lattice members of a larger cross-sectional area than those in the second region and the first region can have smaller interstices between solid lattice members than those in the second region.

A measurement unit module includes a printed circuit board (PCB) and electronic components being mounted on a front face of the PCB, a plurality of measurement unit modules are arranged at intervals in an extending direction of a stripped flat cable, the stripped flat cable is electrically connected to back faces of the plurality of PCBs in sequence to form a measurement unit cluster, the measurement unit cluster is packaged and molded by an extrusion technology of silica gel to form the flexible sensing strip, and the flexible sensing strip can be wound into a sensing strip reel. The packaging structure has the beneficial effects that connection integrity between the measurement unit modules is enhanced, connection strength is improved, and reliability of a flexible clinometer is improved. The flexible sensing strip can be wound into the sensing strip reel so as to be convenient to carry and convey.

A remote key device includes a housing including a first waterproof compartment and two second waterproof compartments spaced from front and rear ends of the first waterproof compartment respectively; two floats disposed in the second waterproof compartments respectively; and a PCB disposed in the first waterproof compartment. There are further provided with a first space disposed between the first waterproof compartment and one of the second waterproof compartments, and a second space disposed between the first waterproof compartment and the other second waterproof compartment. There are further provided with a frame disposed on the first waterproof compartment and a sealing member disposed on the frame.

Systems and methods for controlling airflow through a casing or shelf assembly are provided. An apparatus, according to one implementation, includes a mount plate configured to be attached to a side panel of a casing for housing network equipment. For example, the mount plate may include a window. The apparatus also includes one or more hinges arranged at an edge of the window of the mount plate and a baffle pivotably attached to the one or more hinges. The baffle can be arranged within a range of positions with respect to the mount plate to control an amount of airflow through the window. Within these range of positions, the baffle is configured to redirect the airflow in a front-to-back direction through the casing.

Provided is an engaging driving structure having a first driving fastener, a second driving fastener and a linking unit. The second driving fastener is disposed beside the first driving fastener. The linking unit is disposed between the first driving fastener and the second driving fastener and adapted to movably connect the first driving fastener and the second driving fastener. Therefore, the engaging driving structure is easy to use, labor-saving, and convenient.