摘要:
A card edge connector (10) includes an elongated housing (12) defining a central slot (14) along its lengthwise direction for receiving a card (100) therein. A plurality of passageways (16) are formed in the housing (12) by two sides of the slot (14). Two cavities (18) are formed at two opposite ends of the housing (12) for receiving a pair of corresponding ejectors (20) therein, respectively. A pair of retention bars (34) are positioned adjacent each end of the housing (12) and respectively on two sides of the slot (14). Each ejector (20) includes a main body (22) which is substantially higher than the adjacent retention bars (34). A pair of stopper blocks (32) are formed on two side surfaces (28) of the main body (22) for engagement with the corresponding retention bars (34), respectively, when the ejector (20) is in the vertical position. A locking peg (36) formed at the top of the main body (22) of the ejector (20), horizontally extends toward the central slot (14) and is substantially positioned over the corresponding retention bars (34).
摘要:
A system (10) for interconnecting two modules (100, 100') to the CUP chip, includes two opposite connectors (12, 14) in a head-to-head arrangement. The traces (200) each of which connects the two corresponding contacts 28/30 and 30'/28' each being located in the same position of the corresponding connector (12, 14), are generally arranged in a parallel relationship. One (12) of the connectors (12, 14) is substantially a standard one. The other (14) of the connectors (12, 14) is generally, but not exactly, of a mirror image with regard to the first one (12), wherein the positions of the two-row contacts (28'/30') with regard to the housing (16') along the lengthwise direction of the second connector (14) are arranged in an opposite relationship with regard to those in the first connector (12). When used, a standard module (100) can be inserted into the first connector (12) in a common way with its upside surface (106) facing up, or can be inserted into the second connector (14) in an opposite way with its back surface (108) facing up, whereby the pads (P1-P144) printed on both surfaces (106, 108) of the module (100, 100') can be respectively properly electrically connected to the corresponding traces (200) regardless of which connector (12, 14) it is inserted into.
摘要:
A system (10) for interconnecting two modules (100, 100') to the CPU chip, includes two opposite connectors (12, 14) in a head-to-head arrangement. The traces (200) each of which connects the two corresponding contacts 28/30 and 30'/28' each being located in the same position of the corresponding connector (12, 14), are generally arranged in a parallel relationship. One (12) of the connectors (12, 14) is substantially a standard one which meets the requirements defined in the general specification. The other (14) of the connectors (12, 14) is generally, but not exactly, of a mirror image with regard to the first one (12), wherein the positions of the two-row contacts (28'/30') with regard to the housing (16') along the lengthwise direction of the second connector (14) are arranged in an opposite relationship with regard to those in the first connector (12). When used, a standard module (100) can be inserted into the first connector (12) in a common way with its upside surface (106) facing up, or can be inserted into the second connector (14) in an opposite way with its back surface (108) facing up, whereby the pads (P1-P144) printed on both surfaces (106, 108) of the module (100, 100') can be respectively properly electrically connected to the corresponding traces (200) regardless of which connector (12, 14) it is inserted into.
摘要:
A field emission element includes one supporting wire and at least one field emission layer coated or otherwise formed on an outer surface of the supporting wire. Each field emission layer includes a plurality of carbon nanotubes (CNTs) and is selected from a group consisting of CNT-polymer composites, CNT-glass composites and single-layer/multi-layer CNT films. A method for manufacturing the described field emission element is also provided. The method includes the steps of: (a) providing one supporting wire; (b) forming at least one field emission layer on an outer surface of the supporting wire; and (c) cutting the supporting wire, after forming the at least one field emission layer thereon, according to a predetermined length and then treating the at least one field emission layer on the supporting wire to form the field emission element.
摘要:
A coaxial cable (10) includes at least one conducting wire (110), at least one insulating layer (120) coating a respective conducting wire (110), at least one shielding layer (130) surrounding the at least one insulating layer (120), and a single sheath (140) wrapping the at least one shielding layer (130). The shielding layer (130) includes a metal layer and a carbon nanotube film.
摘要:
A speed-changing control mechanism of a multistage speed-changing wheel hub has a planetary gear device comprising a gear support and a plurality of planetary gears. The planetary gears are respectively engaged with a ring gear and sun gears. The rotational power of a drive member is transmitted to the ring gear or the gear support via a sleeve. A speed ratio change is brought about by the action of the planetary gears and the sun gears. The power is finally transmitted to the wheel hub via the gear support or the ring gear. The planetary gears are driven by the power input source portion of the sleeve in conjunction with the action of another sleeve on the fastening shaft, thereby controlling two sets of one-way ratchet pawls opposite in direction to engage or disengage. As a result, the input of the power source and degrees of freedom of the sun gears can be controlled by the use of the control slot, thereby preventing the interference between the retaining slot and the control key and eliminating the complicated power shifting mechanism.
摘要:
An electrical connector having positioning posts is disclosed. The electrical connector comprises a first and a second positioning posts formed on both longitudinal ends of a front surface of an insulating housing for inserting into a pair of holes of a printed circuit board. Each of the first and second positioning posts defines a respective longitudinal direction, and includes a pair of positioning members on both longitudinal ends, a stop bar between the pair of positioning members, and an open slot between each of the positioning members and the stop bar. The width of the positioning post defined by both sides of the stop bar is shorter than the length of the positioning post defined between respective longitudinal outer surfaces of the positioning members.
摘要:
A given field emission element includes a carbon nanotube field emission wire and at least one supporting protective layer coating an outer surface of the carbon nanotube field emission wire. The carbon nanotube field emission wire is selected from a group consisting of a carbon nanotube yarn, a wire-shaped CNT-polymer composite, and a wire-shaped CNT-glass composite. A method for manufacturing the described field emission element includes the steps of: (a) providing one carbon nanotube field emission wire; (b) forming one supporting protective layer on an outer surface of the carbon nanotube field emission wire; and (c) cutting the carbon nanotube field emission wire to a predetermined length and treating the carbon nanotube emission wire to form the field emission element.
摘要:
An electrical connector comprises a housing having first and second surfaces and forming a plurality of contact supports formed therein. A plurality of electrical contacts is moveably attached to each corresponding support and has a first contacting end extending beyond the first surface for driving the contact to move along the support upon mating with an electrical device.
摘要:
A self-contained change speed apparatus for use on a bicycle. It has fixed shaft, a hub body rotatably supported on the fixed shaft, a change speed device controlled to turn the hub body about the fixed shaft at one of a series of speeds, and a power input member adapted to provide driving power, A clutch is moved between an active position and a non-active position and adapted to transmit driving power from the power input member to the change speed device. A control mechanism changes the speed ratio of the change speed device, advances the clutch to the non-active position before changing the speed of the change speed device, and delays the movement of the clutch to the active position, for permitting driving power to be returned to the change speed device after a change of the speed ratio of the change speed device.