Abstract: An annular device includes an annular main body defining a through hole, a battery mounting portion arranged in the through hole, and a battery cover. The battery mounting portion protrudes from an inner surface of the main body in the through hole, includes a first arcuate element with an outwardly curved surface and a second arcuate element with an outwardly curved surface opposite to each other and cooperatively defining a receiving space. The battery cover is operable to clasp the battery mounting portion, includes a first arcuate member and a second arcuate member opposite to each other. At least one first protrusion is formed on an inner surface of the first arcuate member, at least one cutout is defined in an outer surface of the first arcuate element, and the first protrusion can be fit into the cutout. The second arcuate member clasps the second arcuate element.

Abstract: An annular device includes an annular main body defining a through hole, a battery mounting portion arranged in the through hole, and a battery cover. The battery mounting portion protrudes from an inner surface of the main body in the through hole, includes a first arcuate element with an outwardly curved surface and a second arcuate element with an outwardly curved surface opposite to each other and cooperatively defining a receiving space. The battery cover is operable to clasp the battery mounting portion, includes a first arcuate member and a second arcuate member opposite to each other. At least one first protrusion is formed on an inner surface of the first arcuate member, at least one cutout is defined in an outer surface of the first arcuate element, and the first protrusion can be fit into the cutout. The second arcuate member clasps the second arcuate element.

Abstract: An annular device includes an annular main body, a battery mounting portion, and a battery cover. The battery mounting portion protrudes from an inner surface of the main body, and includes a first arcuate element and a second arcuate element opposite to each other. The battery cover is operable to clasp the battery mounting portion, and includes a first arcuate member and a second arcuate member opposite to each other. The first arcuate member clasps the first arcuate surface, and the second arcuate member clasps the second arcuate surface.

Abstract: An exemplary portable electronic device includes a housing defining an opening, an internal fixing element including a pair of protruding blocks and defining a groove in communication with the opening, and a support mechanism. The groove defines a stepped structure and includes a larger groove portion, and a smaller groove portion communicating with the larger groove portion. The support mechanism is slidably receivable in the housing, and includes a support and a slider defining a recess. The slider includes a connection portion received in the recess and a head set atop the connection portion. The connection portion abuts the pair of the protruding blocks when the slider is in a retracted position. The head is received in the larger groove portion and slidably resting on a step formed between the larger and smaller groove portions. The support includes a body and a board connected to one end of the body.

Abstract: An electronic device having a rotatable support is provided. A main body includes a first cylindrical engaging hole with a plurality of first internal gear teeth. A support body includes a second cylindrical engaging hole with a plurality of second internal gear teeth. A gear includes a first portion inserted in the first engaging hole and engaging with the first internal gear teeth, and a second portion inserted in the second engaging hole and engaging with the second internal gear teeth, to restrict the support body from rotating with respect to the main body. A spring member is compressed between the gear and main body in the first engaging hole, to urge the gear to move away from the main body. A button depressibly mounted on the support body is depressed to move the gear out of the second engaging hole, thereby disengaging the support body from the gear.

Abstract: A table lamp and rotary joint thereof is disclosed. The table lamp including a base body, a lighting member and a frictional rotary joint connecting the lighting member to the base body is disclosed. The rotary joint includes a housing defining a cavity and a rotary portion defining a rotator. The rotator deforms elastically by means of defining a center hole and a slot extending parallel to the axis of the center hole through the rotator. Compressing the rotator into the cavity, the outer surface of the rotator mates tightly to the inner surface of the cavity. Then the rotator rotates frictionally in the cavity and the lighting member can maintain at a desired angle with respect to the housing.

Abstract: A height-adjustable display device for a display includes a base defining a chamber, a supporting member and a latching member. The supporting member is received and vertically movable in the chamber. The supporting member is connected to the display. The supporting member defines a plurality of grooves arranged a vertical direction. The latching member is pivotedly mounted to the base. The latching member includes a hook able to be received in one of the grooves, thereby retaining the supporting member in a desired vertical position.

Abstract: An electronic device includes a housing defining an opening, a button mechanism, and a fixing portion. The button mechanism includes a button cap depressibly received in the opening, a light guiding plate with the button cap mounted on a first side thereof, and a connecting portion. The connecting portion is mounted on an opposite second side of the light guiding plate, and includes a resisting member, and a tab protruding from the resisting member. The fixing portion is received in the housing, and includes a block defining a slot with the tab extending therethrough, an light source for illuminating the light guide plate, a switch to switch on or off the light source and the electronic device. The switch is configured to switch on or off the light source and the electronic device. The button mechanism is depressible so as to enable the resisting member to actuate the switch.

Abstract: A mold includes a female mold defining a receiving space and a male mold including a body and a core protruding from the body. The male mold and the female mold cooperatively define a molding cavity for forming a molding product. The core includes a distal end portion inserted into the receiving space. The distal end portion is configured for forming a through hole of the molding product. The female mold includes two protruding ribs arranged at a parting line between the female mold and the core. The protruding ribs of the female mold is located on opposite sides of the distal end portion, and extend around the distal end portion. The core includes two protruding ribs formed on the distal end portion at the parting line between the female mold and the core. The protruding ribs of the core extend around the distal end portion.

Abstract: An exemplary mechanical joint system includes a joint, an arm, a plurality of teeth, an engaging member, and at least one latching member. The joint defines a pivot hole and a joint receiving hole communicating with the pivot hole. The arm is rotatable relative to the joint and includes a pivot portion and a pivot hole defined in the pivot portion. The pivot portion is received in the joint receiving hole. The engaging member includes a pivot shaft and a fixing member fixed relative to the pivot shaft. The plurality of teeth extends from an outer surface of the shaft portion of the pivot shaft. The latching member is mounted in the pivot hole of the pivot portion of the arm for engaging with the teeth.

Abstract: A backlit logo device includes an elongated light guiding member and two sources. The two light sources are arranged at opposite ends of the light guiding member. The light guiding member includes a display surface. The display surface includes a transparent logo so light from the light sources passes through the logo. The light guiding member further includes a light reflecting surface opposite to the display surface. The light reflecting surface includes a plurality of light diffusing portions formed in a middle portion of light reflecting surface. The light diffusing portions are configured to diffusely reflect the light from the light sources to the display surface.

Abstract: An electronic device includes a housing. The housing includes a transparent substrate, a transparent texture layer, and a colored texture layer. The transparent texture layer is printed on the inner surface of the transparent substrate and has an uneven surface. The colored texture layer is printed on the uneven surface of the transparent texture layer. A three-dimensional effect printing method is also provided.

Abstract: An adjustable stand, for supporting a device having a lateral surface defining a number of recessed portions, includes a base, a rotating frame, and two connecting axles. The rotating frame includes a chassis and two opposing arms extending arcuately and upward from the chassis, wherein the chassis is rotatably connected to the base. The two connecting axles are rotatably connected to the two opposing arms, respectively. Each of the two connecting axles includes at least one elastic protrusion fitting into one of the plurality of recessed portions, and connecting the device to the two connecting axles, wherein the at least one elastic protrusion is able to deform to allow the device to rotatably connect with the two connecting axles.

Abstract: A lamp device includes a lamp seat defining a first through hole, a lamp main body defining a second through hole, and a holding mechanism. The holding mechanism includes a bolt, a first nut, and a second nut. The bolt includes a head and a spindle connecting to the head. The spindle defines first screw threads at the opposite end from the head and second screw threads adjacent to the first screw threads. The threads per inch of the first screw threads are smaller than that of the second screw threads. The spindle passes though the first through hole and the second through hole to connect with the lamp main body and the lamp seat. The first nut and the second nut are respectively fit over the first screw threads and the second screw threads.

Abstract: A height-adjustable display device for a display includes a base defining a chamber, a supporting member and a latching member. The supporting member is received and vertically movable in the chamber. The supporting member is connected to the display. The supporting member defines a plurality of grooves arranged a vertical direction. The latching member is pivotedly mounted to the base. The latching member includes a hook able to be received in one of the grooves, thereby retaining the supporting member in a desired vertical position.

Abstract: An electronic device comprises a housing, a battery retainer arranged in the housing, a battery, a movable member and at least one resilient member. The battery retainer defines a battery cavity and a spring tab. The battery retained in the battery cavity defines a recessed portion and a protrusion protruding from the bottom of the recessed portion. The recessed portion defines a plurality of sloped surfaces and vertical walls surrounding the protrusion. The protrusion defines a side wall. The movable member comprises a first end rotatably connected to the battery retainer and a second end connecting the sloped surfaces. After the battery is pushed into the battery cavity, one of the sloped surfaces engages the second end of the movable member to move until the second end disengages from the side wall of the protrusion.

Abstract: An electronic device includes a main body and an interface shielding cover. A recess is defined in the main body by a vertical wall and a bottom. Two openings are defined in the rear cover between the vertical wall and the bottom wall, two stop walls adjacent to the openings include a first engaging side and a second engaging side. The interface shielding cover includes a pair of elastic arms rotatably connected to the rear cover. Each elastic arm includes a first protrusion and a second protrusion distinctly oriented from the first protrusion. The interface shielding cover is rotatable relative to the rear cover between a closed position where the first protrusion abuts against the first engaging side to retain the cover in the closed position, and an open position where the second protrusion abuts against the second engaging side to retain the cover in the open position.

Abstract: A mechanical joint system includes a joint, an arm, a plurality of teeth, and an engaging member. The joint defines a pivot hole and a joint receiving hole communicating with the pivot hole. The arm is rotatable relative to the joint. The arm includes a pivot portion and a pivot hole defined in the pivot portion, the pivot portion is received in the joint receiving hole. The teeth are formed on an inner surface adjacent to an end of the pivot hole. The engaging member is fixed to the joint. The engaging member includes a prong for engaging with the teeth.

Abstract: A method of manufacturing a housing includes steps of providing a transparent film including a first surface and an opposing second surface. Forming a patterned layer on the first surface of the transparent film, forming a metallic film layer on the first surface of the transparent film to cover the patterned layer, applying an adhesive material on the metallic film. Then placing the transparent film in the mold, the second surface of the transparent film attached to the inner molding surface of the mold. And at last injecting plastic material into the mold to form a plastic base adhered with the transparent film. The housing can have both predetermined patterns and metallic luster.