Abstract: A holder mechanism for holding a handheld device is provided which includes a holder base and a gripping assembly. The gripping assembly is movably mounted on the holder base. The gripping assembly includes an elastic element, a first gripping module, and a second gripping module. The elastic element has a first end fixed to the first gripping module and a second end fixed to the second gripping module. Whereby, the second gripping module can move relative to the first gripping module to grip the handheld device when the elastic element is elastically deformed to apply a resilient force to the second gripping module.

Abstract: A tunable earphone is provided. By moving a tuning rod inserted into a hollow shell with a varied depth to drive a tuning plate thus changing the distance between a speaker and the tuning plate, the air in the hollow shell can resonate for different volumes and different path lengths, thereby adjusting a frequency response characteristic of the whole earphone.

Abstract: A protective case is for use on a tablet mobile device. The tablet mobile device has a front face, rear face and four side faces connecting the front face. The protective case comprises a frame body comprising a bottom portion for supporting the rear face and a holding portion extending from the bottom portion and at least partially bent for lying on the front face; a sealing member comprising an assistant holding portion and for surrounding and holding, in cooperation with the frame body, the tablet mobile device; and a handle member mounted on the frame body and/or the sealing member. The protective case has the advantages of having a simple structure for convenient installation and protecting the exterior of the computer without hiding its display screen. Additionally, the handle member adapts an ergonomic design by using user's arm as support for the computer.

Abstract: A back cover structure disposed on the back of the portable electronic device includes a cover body, a plurality of replaceable adornments and a switching structure. The cover body has an outer surface, an inner surface opposite to the outer surface and facing the portable electronic device, and a through hole passing through the cover body and connected between the outer surface and the inner surface. The replaceable adornments are applied to the cover body, and any one of the replaceable adornments is adapted to and detachably disposed in the through hole of the cover body according to different requirements. The switching structure is disposed on the inner surface of the cover body to secure the replaceable adornment on the cover body or release the replaceable adornment from the cover body.

Abstract: A protective clamp frame having a power and unclamp duplex button for mobile communication devices is disclosed, comprising a main frame, an auxiliary frame and a connection control element, wherein the main frame and the auxiliary frame are both configured in a closed frame structure, and the main frame is formed with a central recessed accommodating part for receiving a mobile communication device, further overlapped with the auxiliary frame, such that the lateral sides of the mobile communication device can be peripherally wrapped; in addition, the connection control element can release the connection between the main frame and the auxiliary frame and operate to engage in touch with the power switch on the mobile communication device in order to provide a duplex structure having power activation and unclamp frame features.

Abstract: The invention relates to a protective frame for a mobile communication device having a power charging port. The protective frame has a retractable frame body, including a main frame body; a sliding element for reciprocatingly sliding along a direction with respect to the main frame body between a retracted protection position where the mobile communication device is fixedly framed by the retractable frame body and a stretched auxiliary power supply position; and a fastening element for fixing the sliding element with respect to the main frame body at the retracted protection position and the stretched auxiliary power supply position. The protective frame also includes an auxiliary battery adapted for being detachably installed in the retractable frame body and electrically connected to the power charging port of the mobile communication device, when the sliding element are fixed with respect to the main frame body at the stretched auxiliary power supply position.

Abstract: A back cover structure disposed on the back of the portable electronic device includes a cover body, a plurality of replaceable adornments and a switching structure. The cover body has an outer surface, an inner surface opposite to the outer surface and facing the portable electronic device, and a through hole passing through the cover body and connected between the outer surface and the inner surface. The replaceable adornments are applied to the cover body, and any one of the replaceable adornments is adapted to and detachably disposed in the through hole of the cover body according to different requirements. The switching structure is disposed on the inner surface of the cover body to secure the replaceable adornment on the cover body or release the replaceable adornment from the cover body.