A circuit board is applied to be inserted an expansion card, the expansion card includes a positioning part. The circuit board includes a board body, a slot, a release structure and a transmission mechanism. The slot is disposed on the board body. The release structure is movably disposed beside the slot along a first direction, and includes a first inclined surface and a blocking portion for limiting the positioning part. The transmission mechanism includes a linkage part and a forcing part which are linked with each other. The linkage part is connected to the release structure. When the forcing part receives an external force, the linkage part moves to move the release structure to the first direction, and releases the limitation of the positioning part by the blocking portion.

A latch includes a cam arm that follows a serpentine groove in the latch handle where curves of the groove create catch positions that define extended and retracted handle positions. In one of the handle positions, an arm of the handle abuts a toothed arm and urges the toothed arm to a latching position in which a tooth is extended. In the other handle position, the arm retracts from the toothed arm, allowing the tooth to retract.

An information processing system includes a housing, a circuit board in the housing, a functional module in the housing, and a module fixing device in the housing. The functional module is inserted into the circuit board. The module fixing device is connected to the functional module and is connected to the circuit board. The module fixing device comprises a clamping member and an elastic member. The clamping member is movably connected to the circuit board in a first direction and a second direction opposite to the first direction, the clamping member comprises a first clamping portion to clamp the functional module. The elastic member is connected to the clamping member, the elastic member is deformable in the first direction to drive the clamping member to move in the first direction to clamp the functional module.

A current transformer assembly includes a first current transformer, a plug, a first wire and a second wire between the plug and the first current transformer adapted to transmit a measurement of the first current transformer; and a memory chip adapted to store a first scale factor of the first current transformer.

A stand for a charger includes an attachment portion attachable and detachable to and from the charger and a leg portion configured to be capable of supporting the charger with the charger being lifted up off the ground surface when the stand is attached to the charger.

An electronic device, including a device body, a case, at least one power supply module, and a power distribution module, is provided. The case is disposed on the device body. The at least one power supply module is disposed in the case. The power distribution module includes a main body, a handle, and an anti-removal frame. The main body is detachably disposed on the device body. The handle is rotatably connected to the main body. The anti-removal frame is slidably disposed in the case. The power supply module is configured to push against the anti-removal frame, so that the anti-removal frame slides toward the handle and restricts the handle from rotating relative to the main body. In addition, a power distribution module configured for the electronic device is also provided.

A frame structure includes a first frame, a rail, a handle, a buckle, a second frame, and buffer members. The first frame includes a bottom plate and side plates. The bottom plate and the side plates define an accommodation space. The rail is located on each of the side plates. One end of the handle is movably disposed on the rails. The buckle is located on the first frame and detachably fastened with the handle. The second frame is movably received in the accommodation space. One end of each buffer member is fixed to a bottom surface of the second frame, and another end resists the bottom plate. The handle is coupled to the second frame. When the handle is separated from the buckle, the handle is pushed or pulled to remove the second frame from the accommodation space or press the second frame into the accommodation space.

An apparatus for retaining a mobile computing device during data collection and field mapping procedures is disclosed. The apparatus comprises a base element configured to be gripped by a user, a shaft comprising a sliding traction mechanism and a first end, wherein the sliding traction mechanism extends from the first end, a clamping mechanism configured to be affixed to the shaft comprising a second end, wherein the first end and second end cooperate to define an interior space sized for retention of the mobile computing device, and a domed housing configured to house an antenna and a global navigation satellite system (GNSS) processor configured to be communicatively coupled to the mobile computing device.

A handle device is configured for a chassis body. The chassis body includes a main part and a cover plate. The handle device includes a base part and a handle part. The base part is disposed on the cover plate. The handle part includes an operative part, a coupling part and a shaft part. The coupling part is connected to the operative part. The shaft part is connected to the coupling part. The coupling part of the handle part is pivotally coupled to the base part. The shaft part is rotatably disposed on the main part. The handle part is movable relative to the base part so as to disengage the cover plate from the main part.

The disclosure relates to handle mechanism and casing assembly. The handle mechanism is adapted to be installed on a slidable plate body. The handle mechanism includes handle component, latch component, and releasing component. The handle component has engaged position. The handle component includes first hook portion and first pushing portion. The first hook portion has first contact surface. The latch component is slidably disposed and has second hook portion and first contact portion. The second hook portion has second contact surface configured to contact the first contact surface. The releasing component is pivotably disposed and has pressed portion and second pushing portion. When the handle component is pivoted from the engaged position, the first pushing portion pushes the pressed portion so as to force the second pushing portion to push the first contact portion so that the second contact surface is forced to leave the first contact surface.