Abstract: A modular power adapter and method for using the same which increases the ease of a user's travel with portable electronic devices. The modular power adapter includes an output module which may be interchangeably and detachably coupled to DC input module or an AC input module. The output module and the input module are provided in separate housing structures thereby effectively spreading the heat dissipated from the modular power adapter.

Abstract: An electric power socket (15a) for receiving an electric plug (80) having a plurality of axially parallel plug pins (86), the power socket including: (a) a rear portion (60) housing a set of electrical connections 88 for making electrical contact with the corresponding plug pins (86); (b) a fixed portion 40 including ? set of guides (42) for reception of the corresponding plug pins; (c) an axially fixed rotatable body 20 retained in a circular cavity (16), biased to an electrically inactive position and rotatable R through an extent of travel to an active position, the rotatable body including a front wall (30) through which extends a corresponding set of apertures (24) to receive the plug pins; and (d) a detent (46, 50) for cooperating with at least a first one of the plug pins in the active position and to resist rotation of the rotatable body toward the inactive position, wherein: (i) each aperture remains in registration with a corresponding one of the guides (42) through the extent of travel; and (ii) th

Abstract: A connector module is disclosed in the present invention. The connector module includes a housing, a substrate whereon a first set and a second set of metal contacts are formed, and at least one conductive resilient piece piercing through the housing. The substrate is disposed inside the housing with the first set of metal contacts exposed outwardly. A first end of the conductive resilient piece is fixed on an outer surface of the housing, and the conductive resilient piece is resiliently deformed and electrically contacts the second set of metal contacts when the conductive resilient piece is pressed by a conductive component of an connector receptacle.

Abstract: A USB connector for connecting with a USB female comprises a rotating shaft assembly which is capable of rotating, metal legs, a connecting line, and a substrate, and said rotating shaft assembly includes a rotating shaft, a rotating shaft sleeve and a rotating shaft support, the rotating shaft is disposed in the rotating shaft sleeve and is capable of rotating relative to the rotating shaft sleeve, the rotating shaft sleeve is located in a support hole of the rotating shaft support, and the rotating shaft assembly with the rotating shaft support is fixed on the surface of the substrate by the rotating shaft support. According to the USB connector and the USB device, the metal legs are formed on the surface of the substrate to ensure the connecting strength of the metal legs and reduce the thickness of the USB device.

Abstract: A signal transmission device is provided. The signal transmission device comprises a linked unit, a switch button, a data connector and a lock fastener. The linked unit includes a first shaft, a second shaft, a first elastomer and a second elastomer. The switch button is attached/disposed on the linked unit. The data connector rotates and expands according to the first shaft and the first elastomer. The lock fastener rotates and moves according to the second shaft and the second elastomer.

Abstract: The present disclosure provides a two-part jack socket for a portable electronic device and a portable electronic device having the same. In accordance with one example embodiment, the jack socket comprises: a first part having a contact surface; a second part having a contact surface and being moveable with respect to the first part between a first position and a second position, the contact surfaces of the first part and second part defining a cavity, the cavity having a retracted state when the second part is in the first position and an expanded state for receiving a jack plug when the second part is in the second position; and one or more contacts located in the contact surface of the first part or second part.

Abstract: A signal transmission device is provided. The signal transmission device comprises a linked unit, a data connector, a sliding block, a link and a lock block. The linked unit includes a first shaft, a second shaft, a third shaft, a first elastomer and a second elastomer. The data connector rotates and expands according to the first shaft and the first elastomer. During the retraction of the data connector, the data connector pushes the sliding block. Then the sliding block moves against the lock block so that the lock block rotates according to the second shaft. The lock block rotates to lock and secure the data connector by the lock piece, while a cam of the link moves to a secure location along an incline plane of a track of the sliding block.

Abstract: A signal transmission module is provided. The signal transmission module includes an electrical connector, a linked unit, a data connector, a sliding block, a link and a lock block. The data connector rotates and expands according to a first shaft and a first elastomer of the linked unit, and electrically connects to the electrical connector. During retraction of the data connector, the data connector pushes the sliding block. Then the sliding block moves against the lock block so that the lock block rotates. The lock block rotates to lock and secure the data connector by the lock piece, while a cam of the link moves to a secure location along an incline plane of a track of the sliding block.

Abstract: An electronic device includes a first opening disposed in a casing; a power source connector disposed opposing the first opening and to which a detachable power supply plug that supplies power from a power supply unit is attached; a second opening disposed in the casing; and a support member by which at least one interface connector among various types of interface connectors for communication with an external apparatus can be attached at the second opening, where the support member covers and hides the power source connector if among the various types of interface connectors, an interface connector having a power supply terminal is attached.

Abstract: A retractable power plug applied for an electronic apparatus or an extension outlet is disclosed. The retractable power plug includes a housing, a base, a movable unit and a plurality of prongs. The housing has a space for enclosing the base. The prongs are pluggably disposed on the base. The base is rotatably and movably located in the space. The movable unit is configured to prompt the base to move in the space. The direction of movement of the base is generally parallel with the connection direction of the prongs. So that, the prongs associated with the base is capable of moving up and down in the space.

Abstract: A retractable USB memory stick includes a metal casing having a longitudinal sliding slot, first and second locating holes located on opposing ends of the longitudinal sliding slot and a hook located on the rear side and defining an access gap, a PC board having a USB plug and a memory IC board, and an insulation PC board holder holding the PC board and slidably mounted in the metal casing. The insulation PC board holder has a sliding block supported on a spring strip and inserted into the longitudinal sliding slot of the metal casing, retaining blocks protruded from the sliding block for selectively engaging the first locating hole or second locating hole to lock the insulation PC board holder to the metal casing in extended or received positions, and a latch located on the rear side and movable with the insulation PC board holder to close/open the access gap.

Abstract: A connector has first and second connector units, each unit incorporating an oil-filled chamber housing one or more contact elements to be joined. At least one connector unit has a face seal assembly which seals the forward end of the contact chamber in the unmated condition. The face seal assembly comprises three elements. One element is an annular elastomeric seal situated radially outward. The two other elements are inner seal elements which are pressed together radially to form a substantially disc-like shape. The resulting disc-like shaped seal fills the central, circular end face opening of the outer annular seal. As the connector units are mated, elements of the elastomeric face seal assembly are displaced, one axially, and others both axially and radially, creating an opening between the oil-filled chambers that is sealed from the outside environment.

Abstract: A data center physical infrastructure management system has a cabinet having rack spaces and a sensor. A data communication system transmits signals to a management database. Personal or automated intervention is determined algorithmically by a data processor. A human interface for the data center management system is provided. Removable electronic assets contained in the rack spaces each have an identifier tag. An identifier tag reader is installed on the cabinet body. A door sensor provides a signal responsive to whether a cabinet door is closed, open, locked, or unlocked. Also, a secure contact arrangement has a base terminal formed of electrically conductive material, and first and second electrically conductive elements. A resilient non-conductive element is interposed between the first and second electrically conductive elements, and a compression element compresses the resilient non-conductive element to cause the first and second electrically conductive elements to communicate with one another.

Abstract: A power converter having a pivotable and receivable power plug has a housing, an adapter board, a power output unit and a plug. The adapter board and the power output unit are mounted inside the housing. The adapter board has two conducting strips and a grounding strip. Each conducting strip has a shaft holder formed by bending a free end of the conducting strip, and two metal pivot shafts formed on two opposite sides of the plug are pivotally and respectively mounted in the shaft holders. The plug has a ground plate having a first engagement portion formed thereon. The grounding strip has a second engagement portion formed therein in a pivoting path of the plug to engage the first engagement portion and position the plug when the plug is pivoted and protrudes beyond the housing. Accordingly, the power converter can have a pivotable and receivable plug with minimum parts.

Abstract: A flash memory device includes a cover, an electrical module, a slider and a rotatable member for driving the slider. The cover defines a receiving chamber and an opening communicating with the receiving chamber. The electrical module is slideably received in the receiving chamber and includes a circuit board and a connector port electrically connected with the circuit board. The rotatable member has a fixed axis around which the rotatable member revolves. The rotatable member includes a protrusion slideably received in a slot defined in the slider. The connector port is driven to telescopically extend through the opening by the slider which is further driven by the protrusion.

Abstract: A memory stick includes a -shaped metal plate member having two tenones respectively protruded from an inner wall thereof at two opposite sides and aimed at each other, each tenon being formed on the -shaped metal plate member by means of punching the inner wall of the -shaped metal plate member with a punch to form a protrusion and then punching the protrusion with a punch rod to extend the height of the protrusion and to deform the protrusion into a tubular configuration, and a casing accommodating a PC board that has a USB connector at its one end and having two pivot holders symmetrically located on two opposite sides thereof and respectively pivotally coupled to the tenones of the -shaped metal plate member for enabling the -shaped metal plate member to be turned relative to the casing to close or open the USB connector.

Abstract: A power data slide (600) includes a power data center (602) to provide electrical power and communication signals. The power data slide (600) includes a slide mechanism (618) connected to said power data center (602) and connectable to the underside of a work surface. The slide mechanism (618) includes a slide carriage (638) connected to the power data center (602), so that extension and retraction of the slide carriage (638) will cause corresponding extension or retraction of the power data center (602) from beneath the underside of the work surface.

Abstract: A bicycle meter including a rechargeable battery, and a retractable USB plug movable between a retracted position and an extended position. In addition, the USB plug is connectable with a USB port to transfer data between the bicycle meter and a computer and to recharge the rechargeable battery, when the USB plug is in the extended position.

Abstract: An electrical pop out device has a shroud and an outlet housing. The outlet housing is sized to be placed inside the shroud. A guidance mechanism connects the outlet housing with the shroud. The guidance mechanism includes multiple rack gears and multiple pinion gears. The outlet housing is moveable with respect to the shroud along a direction defined by the rack gear. A spring connector electrically couples the shroud to the outlet housing.

Abstract: The present disclosure provides a rotary wireless network card with double rotating shafts, which comprises a wireless network card body, an ultra-thin USB interface and a first rotating shaft, wherein at the top of the wireless network card body a opening is provided to accommodate the ultra-thin USB interface as withdrawn; the ultra-thin USB interface extends out of or returns back to the opening by rotating around the first rotating shaft; inside the wireless network card body a rotating shaft support is provided; a second rotating shaft in the opening is rotatably connected to the rotating shaft support; the second rotating shaft is accommodated outside the ultra-thin USB interface and connected to the ultra-thin USB interface; and when the second rotating shaft rotates in the opening, the ultra-thin USB interface and the first rotating shaft rotate in the opening along with the second rotating shaft.

Abstract: The invention provides a power adapter combination including an adapter body and an adapter plug. The adapter body comprises a first casing having an inner space and a receiving recess structure with one side opened through the inner space, a circuit board disposed in the inner space, and a pair of connection terminals electrically connected with the circuit board and partially extending into the receiving recess structure. The adapter plug is detachably engaged into the receiving recess structure and comprises a second casing having a pair of slots thereon and a rear wall having a pair of holes, a bottom plate adapted to be assembled with the second casing, a pair of contact pins of which each has one pivoted end, is placed in one of the slots and is enabled to extend out of said one slot by rotation, and a pair of electrode structures mounted on the bottom plate and electrically connected with the contact pins, respectively.

Abstract: An electronic device includes a first housing, a second housing latching to the first housing, a resilient component assembled to the second housing, and an earphone jack assembly. The second housing includes a first plate comprising a latching portion; and a resilient component assembled on the second housing. The earphone jack assembly includes a base latching to the latching portion, compressing the resilient component and rotatably assembled to the first housing and the second housing.

Abstract: A power strip has a stationary base, at least one rotating base, at least one pintle and a power cable. The at least one rotating base is mounted rotatably on the stationary base. Each of the at least one rotating base has a top surface facing along a Z-axis and at least one socket mounted on the top surface and selectively covered by the stationary base by rotating each of the at least one rotating base to align with the stationary base. The at least one pintle faces along the Z-axis and rotatably connects the at least one rotating base to the stationary base. The power cable is mounted on the stationary base. The socket may be covered to prevent malfunction and shorting problems due to dust accumulation on the socket and prevent penetration by objects.

Abstract: A combination terminal includes a first logic circuit that is configured to interface with a first device using a first protocol. The combination terminal also includes a second logic circuit configured to interface with a second device using a second protocol. The combination terminal includes a retractable portion that includes a first plurality of contacts and retracts based upon an insertion of the second device; connects a first portion of the first device with the first logic circuit; and selects an active logic circuit. The combination terminal includes a static portion comprising a second plurality of contacts and connects the second device with the second logic circuit; and connects a second portion of the first device with the first logic circuit using the second plurality of contacts. The first device is connected to the first logic circuit using the first plurality of contacts and the second plurality of contacts.

Abstract: A contact assembly comprising: a contact pin having a first end and a second end, the contact pin including a ramped portion, and a contact sleeve retainably attached to the first end of the contact pin, the contact sleeve having a flanged end and a non-flanged end, wherein the contact sleeve includes a one or more fingers, wherein, when in a first position, clearance exists between the contact sleeve and the contact pin, wherein, when in a second position, the one or more fingers of the contact sleeve engage an inner surface of a tubular center conductor to increase a moving force required to displace the contact assembly within the tubular center conductor is provided. An associated method is also provided.

Abstract: In the field of data cards with a rotatable external port, a data card with a rotatable connector and a rotatable connector for a data card are provided. The data card with a rotatable connector includes a data card body and a rotatable connector, where the rotatable connector includes an external port for connecting with an external device, and the rotatable connector is rotatably connected with the data card body. The data card further includes an antenna set in the rotatable connector. The rotatable connector for a data card includes a rotatable connector body and an external port for connecting with an external device, and includes an antenna therein. Through setting the antenna in the rotatable connector, no matter what angle the data card is rotated, the antenna is always maintained in the same state, so that the antenna can be modulated in advance, so as to eliminate the interference on the performance of the antenna caused by the external device, and ensures stable performance of the antenna.

Abstract: The present invention discloses a mini power supply module comprising a circuit board and a power connector. Said power connector is abutted and electrically connected with said power connector through coupling parts. Said power connector is provided with an orientating mechanism to change the angle between said power connector and said circuit board. Said power connector is further included with an input port for receiving the input of an external power source, a contact terminal for matching with the connector on motherboard, and at least one output port for outputting power to peripheral devices.

Abstract: Disclosed is a contact terminal closing device for a portable storage device. The disclosed contact terminal closing device includes: a contact terminal received in a housing; a guide frame; a push sliding knob coupled to the guide frame in such a manner that depending on whether the push sliding knob is manually pushed or not, the push sliding knob locks the contact terminal or releases the contact terminal from the locked state, the push sliding knob being moved in the longitudinal direction of the guide frame to manually retract the contact terminal into the housing or to manually extract the contact terminal from the housing; and one or more shielding members provided on the guide frame to be cooperatively moved depending on the movement of the push sliding knob, the shielding members being adapted to completely shield the contact terminal from the outside.

Abstract: A connector mechanism includes a base and a casing. An opening is formed on a side of the base and the casing. The connector mechanism further includes a circuit terminal installed on the base, and a sliding socket connected to the base in a slidable manner and disposed on a side of the circuit terminal. The connector mechanism further includes a contacting terminal installed on the sliding socket for contacting with the circuit terminal. The connector mechanism further includes a sliding cover pivoted to the sliding socket, and at least one resilient component. The resilient component drives the sliding cover to separate from the sliding socket when the sliding socket slides to a position relative to the base where the casing does not constrain the sliding cover so as to generate a distance between the sliding cover and the sliding socket greater than a height of the opening.

Abstract: Electrical power adapters comprising retractable prongs and/or retractable electrical outputs are disclosed. In one example, an electrical travel adapter includes a power unit having a retractable electrical output and a plug unit coupled to the power unit, the plug unit having a plurality of retractable prongs.

Abstract: A USB device including a bistable mechanism that serves to bias a plug connector into one of two stable states, where the first stable state is associated with a retracted position in which the plug connector is fully retracted inside a housing, and the second stable state is associated with a deployed position in which the plug connector extends through the front opening for coupling to a host system. Movement of the plug connector form the retracted to the deployed position is performed by manually applying a force to a handle portion that protrudes through a slot defined in the housing. The bistable mechanism resists the deploying force until an equilibrium point is reach, after which the bistable mechanism releases stored potential energy to complete the deploying process and to maintain the plug connector is the deployed position.

Abstract: A thumb drive includes a retractable USB connector sized to translate between an extended position beyond a housing and a retracted position into the housing. An actuator, such as a dial or a lever, is sized to actuate the USB connector to move the USB connector between the extended position and the retracted position. The USB connector is sized to translate to the extended position when the actuator is moved in one direction. The USB connector is sized to translate to the retracted position when the actuator is moved in an opposite direction.

Abstract: An electrical plug connector includes a rotary assembly, an electrical plug assembly having a live prong assembly, a neutral prong assembly, and a ground prong assembly and capable of rotating with respect to a first predetermined axis, and a linkage portion between the rotary assembly and the electrical plug assembly for linking the live prong assembly, the neutral prong assembly, and the ground prong assembly. The linkage portion is configured to enable the live prong assembly, the neutral prong assembly, and the ground prong to rotate with respect to a first predetermined axis simultaneously. When not so linked the three prongs may be folded into receiving spaces on the plug connector.

Abstract: A retractable power plug applied for an electronic apparatus or an extension outlet is disclosed. The retractable power plug includes a housing, a base, a movable unit and a plurality of prongs. The housing has a space for enclosing the base. The prongs are pluggably disposed on the base. The base is rotatably and movably located in the space. The movable unit is configured to prompt the base to move in the space. The direction of movement of the base is generally parallel with the connection direction of the prongs. So that, the prongs associated with the base is capable of moving up and down in the space.

Abstract: A cable management system or member has an optional enclosure and annular hubs defining an axis. A rotatable support frame is attached to the annular hubs, with a patching field having a plurality of ports and first and second primary sides attached to the rotatable support frame. Rotation of the rotatable support frame about the axis produces corresponding rotation of the annular hubs. When cable bundles pass through the annular hubs, they may also rotate with the support frame, reducing or eliminating the need for cable slack loops and reducing or eliminating stress at cable/port connection points.

Abstract: A universal serial bus (USB) interface includes a positive differential signal pin including first and second sections, a button mounted to the USB interface, and an elastic piece. The button includes a driving rod with a distal end resisting against the second section, a receiving room is defined below the second section to receive the elastic piece, so the second section is clamped between the elastic piece and the driving rod and is electrically connected to the first section. When the button is pressed, the driving rod of the button causes the second section to deform the elastic piece, so the second section moves away from the first section. When the button is released, the elastic piece is restored to return the first section to the second section, so the first and second sections are electrically connected again.

Abstract: An electronic device includes a main body, at least two pins folded mounted to the main body, and at least two conductive assemblies received in the main body. Each of the conductive assemblies includes a locking member and a resilient member resisting the locking member, when the pins are pushed and substantially perpendicular to main body, each locking member is capable of locking with an end of one of the pins.

Abstract: A portable memory device comprises a housing, a circuit board, and a covering member. The portable memory device is convenient to use since the plug of the memory device can be easily exposed or covered simply by a pulling or pushing action. Furthermore, no matter whether the portable memory device is in use or not, its rear end is always closed to prevent foreign objects from entering the housing and causing damage to the circuit board.

Abstract: A planar electrical connector is configured to be stowed within a personal electronic device. The planar electrical connector comprises a connector housing having a moveable support structure. The moveable support structure is configured to permit movement of the planar electrical connector relative to the personal electronic device between a use position and a stowed position. The connector housing configured to define a single plane of contact within a charging receptacle and support a positive electrical contact and a negative electrical contact.

Abstract: A power adapter with cable organizer is provided. The power adapter includes a main body; and a containing/fixing portion disposed on the main body and having a first blade and a second blade, wherein the first blade and the second blade face each other to form a receiving portion.

Abstract: An electric plug device and a method for extending and replacing a malfunctioning female power outlet are provided. The electric plug device comprises a mains plug, an extension cable, and a power extender. The mains plug comprises a male power inlet and multiple first female power outlets. The male power inlet is electrically connected to the first female power outlets and provides an electrical input pathway. The first female power outlets provide electrical output pathways. The malfunctioning female power outlet may be one of the first female power outlets. The extension cable electrically connects the malfunctioning female power outlet to the power extender. The power extender comprises multiple second female power outlets. The malfunctioning female power outlet is connected to the second female power outlets by the extension cable. The extension cable and the power extender enable the extension and the replacement of the malfunctioning female power outlet respectively.

Abstract: A rechargeable battery assembly comprises a rechargeable battery unit and a data and power connector plug. The battery assembly has a deployed configuration in which the battery assembly has the general form of and functions as a conventional battery format, and a recharge configuration in which the data and power connector plug is made accessible to enable said connector to be connected to a suitable receptacle on a computing or peripheral device for recharging of the battery.

Abstract: An electronic device includes a main body, a circuit board, a receiving space defined in one side of the main body, a plurality of USB ports and a driving module. The receiving space includes a plurality of sets of fixed contacts on a bottom thereof, and the fixed contacts are electrically connected to the circuit board in the main body. The plurality of USB ports are slidably received in the receiving space, and each USB port comprises a set of external contacts. The driving module is configured to push one of the USB ports to a first position, wherein the USB port is able to slide from the first position to a second position where the set of external contacts of the USB port engages one of the plurality of sets of fixed contacts, which electrically connects the one of the USB ports with the circuit board.

Abstract: This Utility Model is a multi-purpose plug. It includes a pedestal (1) which is used to connect with the electric equipment. Its feature is that it also includes a number of different-typed plug connectors (2) which are detachably connected with the described pedestal (1). This multi-purpose plug includes a number of different types of plug connectors. They are suitable for various sockets thus making them more convenient to use.

Abstract: An in-wall mounted receptacle device includes a body and an electrical outlet box, wherein the body has an accommodating section. The electrical outlet box has a junction surface and is disposed inside the body. When the electrical outlet box rotates, a perpendicular direction of the junction surface varies and points outwardly or inwardly. Whereby, the in-wall mounted receptacle device of the present invention is capable of receiving both an electrical plug which is connected with the junction surface and an electric wire coupled to the electrical plug into the accommodating section, thereby preventing the electrical plug from exposure outside and further reducing the occupied space of the electrical plug. Moreover, the orientation of the junction surface is capable of changing directions so as to alter the direction of the electric wire adjacent to the electrical plug, thereby minimizing the possibility of bending or damaging the electric wire exposed outside.

Abstract: A connector module including a case, a first connector, a second connector, and a switching unit is provided. The first connector disposed in the case has a first connecting portion. The second connector slidably disposed in the case has a second connecting portion. The switching unit is connected between the second connector and the case, and drives the second connector to move along an axis between a first position and a second position. When the second connector is located at the first position, only the first connecting portion is exposed from the case. When the second connector is located at the second position, the first and the second connecting portions are close to each other and exposed from the case.

Abstract: An electrical connector comprises a dielectric spacing element having elongate through holes and a forward end surface; a plurality of parallel, elongate conductive contacts arranged in respective through holes of the spacing element, the conductive contacts providing electrical connections; an outer body arranged about the spacing element and the conductive contacts, the outer body having a longitudinal position fixed relative to the dielectric spacing element and having a forward end for engagement with a mating connector; and a collar slidably mounted about the outer body. The collar has an engagement position in which a forward surface of the collar is positioned in front of the forward end of the outer body for mechanically coupling the connector with the mating connector and a retracted position in which the forward surface of the collar is positioned behind the forward end surface of the spacing element for cleaning access to the conductive contacts.

Abstract: An electronic device with a swinging board is described. The electronic device includes a body, a swinging board and a connector. The body includes a reserving chamber and a circuit board, and the swinging board includes at least one opening. The swinging board is connected to the body and movable between an operating position and a reserving position with respect to the reserving chamber. The connector is disposed in the opening and electrically connecting with the circuit board. The connector is stored in the reserving chamber when the swinging board is rotated to the reserving position. Alternatively, the connector is moved to the outside of the reserving chamber when the swinging board is rotated to the operating position.

Abstract: An extended universal serial bus (USB) storage device is described herein. According to one embodiment, an extended USB storage device includes a printed circuit board assembly (PCBA) having a flash memory device and a flash controller mounted thereon, and an extended USB connector plug coupled to the PCBA for providing a USB compatible interface between an external device and the flash memory device and the flash controller, wherein the extended USB connector plug includes a first end used to couple to the external device and a second end coupled to the flash memory device and the flash controller. The extended USB connector plug includes multiple communication interfaces. Other methods and apparatuses are also described.

Abstract: A plug structure with angle-adjusting function includes a main body, an adjusting mechanism, a plurality of inserting elements and a power cord. The adjusting mechanism has a push button and a plurality of rotary elements. The push button is movably disposed in the main body, the rotary elements are rotatably received in the main body, the push button has a guiding groove, each rotary element has at least two axle portions, and the axle portions of the rotary element are received in the guiding groove. The inserting elements are respectively fixed on the rotary elements, and each inserting element has a front side exposed outside the main body. The power cord electrically connects to the inserting elements. Therefore, the two inserting elements can be selectably inserted into two types of socket by matching the push button of the adjusting mechanism and the special design of the rotary elements.