Abstract: A tray for semiconductor devices includes a base with a positioning unit. The positioning unit includes a plurality of tiered projections which jointly define and surround an enclosed space for receiving a semiconductor device. Each tiered projection is a two-tier structure including an inclined surface portion and an upright surface portion connected to the inclined surface portion, and a semiconductor device can be received, and limited in position, between the upright surface portions. When the tray bounces due external vibrations such that the semiconductor device received in the enclosed space is moved away from the upright surface portions to the inclined surface portions, the inclined surface portions of the tiered projections can guide and adjust the semiconductor device, returning the semiconductor device to between the upright surface portions, in order for the tray to carry the semiconductor device stably.

Abstract: A tray for semiconductor devices includes a base with a positioning unit. The positioning unit includes a plurality of tiered projections which jointly define and surround an enclosed space for receiving a semiconductor device. Each tiered projection is a two-tier structure including an inclined surface portion and an upright surface portion connected to the inclined surface portion, and a semiconductor device can be received, and limited in position, between the upright surface portions. When the tray bounces due external vibrations such that the semiconductor device received in the enclosed space is moved away from the upright surface portions to the inclined surface portions, the inclined surface portions of the tiered projections can guide and adjust the semiconductor device, returning the semiconductor device to between the upright surface portions, in order for the tray to carry the semiconductor device stably.

Abstract: A detachable anti-write device for a memory card includes: an insulated housing including an upper cover and a lower cover which are connected to each other; and an anti-write switch disposed a lateral edge of the insulated housing and connected to the insulated housing by a break away connecting member. The anti-write device can be irreversibly broken and detached from the memory card, therefore is capable of improving the security of the data stored in the memory card.

Abstract: An elastic positioning structure for a semiconductor carrier is provided with a plurality of stop blocks formed on and extending along the walls of the semiconductor carrier, the fixed end and the elastic free end of the respective stop blocks are located at the same level, so that the fixed end can still serve as a restricting structure to restrict the semiconductor, even when the free end of the stop blocks lose elasticity. The positioning structure has a narrow top and wide bottom, and the recess of the semiconductor carrier is narrow at the top and wide at the bottom, so that the semiconductor can be easily taken out and put into the recess, and can be well restricted in recess without disengaging therefrom.

Abstract: An elastic positioning structure for a semiconductor carrier is provided with a plurality of stop blocks formed on and extending along the walls of the semiconductor carrier, the fixed end and the elastic free end of the respective stop blocks are located at the same level, so that the fixed end can still serve as a restricting structure to restrict the semiconductor, even when the free end of the stop blocks lose elasticity. The positioning structure has a narrow top and wide bottom, and the recess of the semiconductor carrier is narrow at the top and wide at the bottom, so that the semiconductor can be easily taken out and put into the recess, and can be well restricted in recess without disengaging therefrom.

Abstract: A stepped elastic positioning structure for a semiconductor carrier includes a plurality of transversely and longitudinally arranged walls and a plurality of recesses defined by the walls. On the walls of the semiconductor carrier is formed a plurality of L-shaped stop blocks, each of the stop blocks has an elastically deformable free end which is capable of elastically restricting the semiconductor in the recess, and improving the easiness for putting in or taking out the semiconductor. The end of each of the stop blocks is a stepped structure, plus the elastic deformability of the stop blocks, which makes the recess capable of holding different sized semiconductors.

Abstract: A stepped elastic positioning structure for a semiconductor carrier includes a plurality of transversely and longitudinally arranged walls and a plurality of recesses defined by the walls. On the walls of the semiconductor carrier is formed a plurality of L-shaped stop blocks, each of the stop blocks has an elastically deformable free end which is capable of elastically restricting the semiconductor in the recess, and improving the easiness for putting in or taking out the semiconductor. The end of each of the stop blocks is a stepped structure, plus the elastic deformability of the stop blocks, which makes the recess capable of holding different sized semiconductors.

Abstract: An elastic positioning structure for a semiconductor carrier is provided with a plurality of stop blocks formed on and extending along the walls of the semiconductor carrier, the fixed end and the elastic free end of the respective stop blocks are located at the same level, so that the fixed end can still serve as a restricting structure to restrict the semiconductor, even when the free end of the stop blocks lose elasticity. The positioning structure has a narrow top and wide bottom, and the recess of the semiconductor carrier is narrow at the top and wide at the bottom, so that the semiconductor can be easily taken out and put into the recess, and can be well restricted in recess without disengaging therefrom.

Abstract: An extension positioning structure for a portable memory device comprises a main body in a shell. A first end of the main body is disposed a drive element, and a spring is mounted outside a second end of the main body. A positioning element is pivotally disposed between the shell and the drive element. The positioning element includes a pivot shaft and an engaging portion. The engaging portion is helically formed with multiple cutting surfaces, and the positioning block is formed with a positioning block and a limiting block. By pushing the drive element, the cutting surface of the engaging portion of the positioning element cooperates with the positioning block and the limiting block to make the connecting terminal extend out of and retract into the shell, facilitating the operation and storage of the memory device while reducing both the production cost and increasing the yield rate.

Abstract: An extension positioning structure for a portable memory device comprises a main body in a shell. A first end of the main body is disposed a drive element, and a spring is mounted outside a second end of the main body. A positioning element is pivotally disposed between the shell and the drive element. The positioning element includes a pivot shaft and an engaging portion. The engaging portion is helically formed with multiple cutting surfaces, and the positioning block is formed with a positioning block and a limiting block. By pushing the drive element, the cutting surface of the engaging portion of the positioning element cooperates with the positioning block and the limiting block to make the connecting terminal extend out of and retract into the shell, facilitating the operation and storage of the memory device while reducing both the production cost and increasing the yield rate.

Abstract: A portable storage device comprises a memory device, a housing and a locking mechanism. The memory device includes an upper and a lower covers, and a memory with one end clamped therebetween, and another end of the memory is an USB connector for connecting to computer. The housing is provided with two ears at both sides thereof, and each of the ears is formed with a through hole. The locking mechanism comprises a flexible member, and both ends of the flexible member being formed with a locking portion, each of the locking portions is inserted through the through holes of the ears and engaged with a locking members, respectively. The locking portions of the flexible member are formed with outer threads for meshing with inner threads of the locking member. The portable storage device can also be used to carry small objects in addition to being used as storage device.

Abstract: A rotary-disc memory device comprises a memory device body which is connected to a rotary disc through a connecting shaft. The rotary disc is rotated to drive the connecting shaft to push the memory device body, so that the memory device body can be extended out of or retracted into the memory device.

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 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 portable extension memory storage device comprises a body and a slide positioning member. The body includes an elastic positioning tongue. The slide positioning member includes a positioning rib to be engaged into a positioning concave in the positioning tongue. With the elastic positioning tongue, the abrasion can be reduced, and the service life can be extended. The positioning concave offers an assured and firm engagement to improve the convenience in use. The assembly of the portable extension memory storage device can be finished without using any other threaded elements or locking elements, thus reducing the material and labor cost.

Abstract: A rotary-disc memory device comprises a memory device body which is connected to a rotary disc through a connecting shaft. The rotary disc is rotated to drive the connecting shaft to push the memory device body, so that the memory device body can be extended out of or retracted into the memory device.

Abstract: A chip carrying tray comprises plural rectangular flat carrying portions for carrying plural chips. Each of the carrying portions is provided with stopping walls for restricting the slippage of the chip. The stopping walls are defined with through holes for discharging moisture of the chip carrying tray. By such arrangements, the chip carrying tray can stably carry the chips and substantially keep the chips dry.