In a circuit board unit storing circuit boards in a plurality of columns and rows, mounting and demounting of the circuit boards are locked without increasing an external shape of a product compared to a conventional configuration. Substrates are provided that have cut-away portions and a lock structure of a circuit board unit includes a slide portion that is formed of a frame member having openings arranged in a grid shape into which the circuit boards are able to be inserted and that is slidably mounted on a circuit board insertion surface of a front mask, and projection portions that are provided in the slide portion and are fitted into the cut-away portions of the circuit boards stored in a case when the slide portion is slid in one direction.

Techniques for graphic formation via material ablation described. In at least some implementations, a graphic is applied to a surface of an object by ablating layers of the object to form an ablation trench in the shape of the graphic. In at least some embodiments, an object can include a surface layer and multiple sublayers of materials. When an ablation trench is generated in the object, the ablation trench can penetrate a surface layer of the object and into an intermediate layer. In at least some implementations, height variations in an object surface caused by an ablation trench can cause variations in light reflection properties such that a graphic applied via the ablation trench appears at a different color tone than a surrounding surface, even if the ablation trench and the surrounding surface are coated with a same colored coating.

An eletrical wiring device includes a housing having a front outer surface is visible during use and in an installed position, a side surface and a rear surface. Printed indicia is provided on the side surface of the housing or a front surface of the housing for identifying the location of compliance installation instructions for installing the electrical wiring device in a wiring system. The printed indicia is oriented to be visible by the installer during installation of the electrical wiring device and is oriented to be covered by a faceplate after installation of the electrical wiring device. Printed compliance installation instruction indicia is provided on the housing for installing the electrical wiring device in the electrical system. The compliance installation instruction indicia is oriented to be visible by the installer during installation of the electrical wiring device in the electrical system.

An electronic device and methods for assembling and disassembling the same are provided. The electronic device has a vertical orientation and has an outer casing that includes a case bottom piece, a case top front piece and a case top back piece. The electronic device further comprises a screwless engagement structure for attaching the case top front piece to the case top back piece to form a top structure. The electronic device also comprises a plurality of screwless clip and spring mechanisms for attaching the top structure to the case bottom piece.

A circuit board cover having a housing having a first surface, a perimeter edge, a housing cavity partially defined by the first surface and the perimeter edge, a skirt extending from the perimeter edge away from the first surface in a first direction to partially define the housing cavity, and a plurality of ports disposed on the first surface. The housing cavity can be operable to house a printed circuit board. Each of the plurality of ports can include (i) a sidewall extending away from the first surface in a second direction opposite to the first direction, (ii) a port cavity partially defined by the sidewall, and (iii) one or more terminals disposed at least partially within the port cavity.

The present invention relates to an electricity meter with a unique structure to prevent tampering and damage to the nameplate. The meter comprises a drawer-like structure with an opening, a nameplate positioned within the drawer-like structure, and a cover fixed to the drawer-like structure over the opening. The cover is designed to protect the nameplate from any external factors that could potentially damage or tamper with it. This innovative design ensures the accuracy and reliability of the electricity meter, preventing any interference with the nameplate. The design can be adapted to various types of electricity meters, making it an essential feature for maintaining the integrity of the meter.

An electronic control device (1) includes a cover (30) (housing). The cover (30) (housing) includes at least a metal layer (32), a plating layer (33), an exposed site (32a), and a seal tape (70) (lid portion). That is, the cover (30) housing includes a metal layer (32) made of metal, a plating layer (33) that coats an outer surface of the metal layer (32), an exposed site (32a) that exposes the metal layer (32) from a part of the plating layer (33), and a seal tape (70) (lid portion) that covers the metal layer (32) exposed by the exposed site (32a).

In one aspect, an example system implementing the disclosed techniques includes a data center rack having a left vertical flange and a right vertical flange, the data center rack divided into a plurality of U positions, wherein each U position is spaced in groups of three holes provided in the left vertical flange and the right vertical flange, and wherein the holes enable mounting of electronic devices in the data center rack. The system also includes an optically readable label provided at a U position of the plurality of U positions in the data center rack, wherein the optically readable label encodes location identifying information that can be accessed by an optical reader.

Embodiments of this application provide a detection label for an electronic device and an electronic device. The detection label includes a detection part and an adhesive layer, where the detection part is configured to detect whether liquid flows into an electronic device, and the adhesive layer is configured to connect the detection part to a housing of the electronic device. The detection part has a first surface, the first surface is a surface of a side facing towards the housing, the adhesive layer may be disposed on the first surface, and an area of the adhesive layer is less than an area of the first surface. In this way, a part of the first surface is not covered with the adhesive layer, and liquid can be in contact with the first surface, so that the detection part can perform detection in a plurality of directions simultaneously.

A retractable module includes a pair of bases spaced apart and a tube positioned between the bases. The tube is configured to rotate about its center axis relative to the bases. The retractable module includes a latch including one or more prongs. The latch is configured to move between a release position and a fixed position. The retractable module includes a first spring configured to urge the tube to rotate in a first direction. The first spring includes a first end and a second end. The first end being fixed to one base of the bases, and the second end being fixed to the tube. The retractable module further includes a sheet wrapped around the tube. The sheet is configured to unwrap from around the tube as the tube rotates in the second direction and wrap around the tube as the tube rotates in the first direction.