Abstract: An optical switch (1) includes a cover (10), a base (20), two input ports (30, 50), two output ports (40, 60), a movable reflecting element (70), a fixed reflecting element (80), and a driving means (90). The movable reflecting element has a first mirror (71) and an opposite facing second mirror (72). The fixed reflecting element has a third mirror (81). The movable reflecting element is movable by the driving means from a first position, in which signals transmit from input to output ports without reflection from mirrors, to a second position, in which reflection from the mirrors effects a switching of the optical signals to different output ports. The presence of the fixed reflecting element automatically compensates for a distance between the first and second mirrors, allowing reflected signals to accurately align with respective output ports.

Abstract: An optical fiber holder (2) includes a holding element (3) and a base (4). The base forms a flange (41) protruding above the rest of the base. A pair of slots (42) is defined between the flange and the rest of the base. The holding element defines a passageway (34) for containing a plurality of fibers (5) and forms a pair of fixing feet (31). The holding element is assembled onto the base with the fixing feet being engaged with the slots. When an outside force acts on fibers held in the passageway, the holding element can rotate relative to the base, within a fixed range, protecting the fibers from damage.

Abstract: A variable optical attenuator (10) of the present invention includes a cover (2), a housing (3), an optical module (4), a reciprocating means (5), and a filter (9). The reciprocating means, optical module, and filter are assembled in the housing. The reciprocating means includes a carrier (53) mounted to a rotatable screw rod (55). The filter has a varying optical density gradient over one of its dimensions and mounts on the carrier. Light signals are transmitted from an input optical fiber (45) through the filter and are reflected off a reflector (42) of the optical module to pass again through the filter to an output optical fiber (46). When the screw rod is rotated, the carrier with the filter mounted on it moves toward one side of the housing or another, varying the attenuation of the light signals. The screw rod can be rotated using a screwdriver through a side hole (33,34) on either side of the housing.

Abstract: A case structure of the present invention having an improved EMI shielding comprises a front case, a rear case and a PCB having ground traces and a plurality of electronic components thereon, a conductive elastic member. The front and rear case are made of a metallic material. The rear case includes a bottom, a sidewall and a cavity defined between the bottom and the surrounding sidewall. The bottom forms conductive rails extending into the cavity and cooperating with the ground trace of the PCB. A conductive elastic member is formed on the rails of the rear case by applying viscous conductive resin to the rails. The ground faces of the PCB electrically connect with the conductive rails of the rear case via the conductive elastic member, thus, providing an improved shield consisting of the rear rails, the PCB, and the front rear cases. The imposed shield is simpler to assemble and lower in cost since no additional frame and screws are required.

Abstract: A holding device (200) used for a DWDM module. The holding device comprises a base (201), a plurality of projections (209), a plurality of C-shaped grooves (205) interleavingly defined between the projections, and a plurality of C-shaped slots (210) defined in upper portions of the projections respectively. An upper portion of each projection forms two chamfers (211, 212), on opposite sides of the corresponding slot. The chamfers extend inclinedly upwardly in a mutually diverging manner. The upper portion of each projection also forms two opposite slanted faces (207, 208). Two slanted faces of any two projections that oppose each other across an intervening groove extend inclinedly upwardly in a mutually diverging manner. The grooves hold sleeves (101) that enclose DWDMs (100). The slots hold optical fibers (102) of and connecting with the DWDMs.

Abstract: A modular connector of the present invention comprises an insulative housing, at least two terminal modules, a shell for enclosing the insulative housing and indicating devices. The insulative housing defines at least two mating cavities in a front portion and at least two insert openings in a bottom wall thereof. The terminal modules each comprise a plurality of contacts injection molded in a spacer thereof and are inserted into the insert openings from a bottom side of the insulative housing. The indicating devices are received in first receiving grooves defined in the insulative housing for signaling circuit transmission. The shell encloses the insulative housing while providing openings for insertion of at least two mating connectors and apertures for protrusion of the indicating devices therethrough.

Abstract: An optical fiber device (1) includes an upper cover (18), a lower cover (19), and two optical fiber holders (2). Each optical fiber holder includes a retaining body (10), a strain relief boot (20), and an interconnection member (30). A passage is defined in each optical fiber holder, for receiving a plurality of optical fibers therethrough. An inner rib (311) is formed on an inner surface of the interconnection member, and is engagingly received in a groove (112) defined in a front portion of the retaining body. Two parallel outer ribs (321) are formed on an outer surface of the interconnection member, and are engagingly received in corresponding grooves (162) defined in the upper and lower covers. An engaging bead (211) is formed at a front end of the strain relief boot, and is engagingly received in a rear groove (123) defined in an intermediate portion of the retaining body.

Abstract: An EMI shield device is used for shielding electronic components on a printed circuit board (PCB) (13) of a mobile phone (1). The shield device comprises an upper cover (11), a lower cover (14), an EMI shield (12) and a fastening portion (2) releasably securing the shield onto the upper cover. The shield has a top wall (121) and side flanges (122) downwardly depending from edges of the top wall for shielding the electronic components on the PCB. The fastening portion includes a plurality of internal latches (21) downwardly depending from a lower surface (113) of the upper cover, and a plurality of holes (22) defined in the shield to engage with the latches. The upper and lower covers are attached together to enclose the shield and the PCB in a space therebetween. An alternative fastening portion comprises use of screws and an upper cover with internally threaded posts downwardly depending from the lower surface of the upper cover.

Abstract: A method of manufacturing a high density connector comprises five steps. The first step is to prepare essential elements of the connector, such as a dielectric cover, a metallic shell, a pair of guiding members and a plurality of contacts. Each contact is L-shaped and comprises a horizontal soldering portion. The second step is to first insert mold a pair of dielectric bases around the contacts to produce a contact subassembly. The three step is to second insert mold a dielectric housing around the contact subassembly to form a contact module. The forth step is to adjust the horizontal soldering portions of the contacts for ensuring a good coplanarity thereof. The fifth step is to assemble the contact module with the cover, the shell and the guiding members, thereby completing the connector.

Abstract: A switching receptacle connector comprises an insulative housing and a plurality of substantially same pairs of switch contacts retained within the housing. The housing defines a longitudinal mating opening for extension of a mating plug terminal and a plurality of receiving slots in communication with the mating opening for receiving the corresponding switch contacts. Each pair of contacts includes a first contact and a second contact. Each first contact has a first soldering section, a first retaining section for engaging with the housing, and an abutting section for abutting against the corresponding second contacts. Each second contact forms a second soldering section, a second retaining section for engaging with the housing, and a mating section for contacting with a mating plug terminal. The mating section of each second contact is configured to conform the configuration of the mating plug terminal thereby providing a good electrical contact therebetween.

Abstract: An IC card connector comprises an elongate housing and a number of terminals fitted in two rows therein. The housing has a pair of step-shaped sidewalls, a number of passageways ranged along the length of the housing, and a pair of spindles longitudinally extending along the length of the housing and intersecting each passageway. Each terminal includes a base with a mounting surface at a bottom thereof, a fitting tail extending from the base, an annular beam moveably surrounding a corresponding spindle, and a spring beam defining a retaining portion at a free end thereof. Each fitting tail is adjacent and parallel to the base thereby ensuring coplanarity between the mounting surfaces of the plurality of terminals and a circuit board. The annular beams are supported by the spindles thereby positioning the terminals in corresponding passageways, and the retaining portions abut against the sidewalls thereby ensuring uniform normal forces applied by the terminals against an IC card pressed against the connector.

Abstract: A board-to-board electrical connector comprises an insulative housing defining an array of channels therethrough and a corresponding number of conductive contacts inserted into the corresponding channels from a top of the housing for protecting soldering portions of the contacts from being damaged and for assuring coplanarity of the soldering portions in assembly. Each channel is defined by two adjacent partitions of the housing and extends through the housing from the top surface to the bottom surface. A pair of latching projections is formed on both sides of each partition. Each contact is used to electrically connect one PC board to another and includes a hook abutting against an underside of two latching projections which project opposite one another in each channel, effectively controlling the height which each contact springs above the housing.

Abstract: An electrical connector (10) comprises an insulative housing (20) having a D-sub receptacle (30) and an audio jack (40) mounted thereto, and a metal shell (50) assembled to the housing (20). Grounding legs (28) of the board locks (26) downwardly extend from the housing (20) for engaging with ground traces on a PCB and groundingly clips (43) protrude from a front face of the audio jack (40) for contacting a computer enclosure whereby accumulated charges on the connector (10) can be effectively discharged. The shell (50) shields the connector (10) from being adversely affected by external charges and prevents internal electromagnetic waves of the connector (10) from radiating externally by creating other grounding routes for electrical discharge. The shell (50) can be assembled to the connector (10) either before or after the connector (10) is mounted on a PCB.

Abstract: An IC card connector comprises an insulative housing and a plurality of contacts. A plurality of passageways is defined through the insulative housing for receiving the corresponding contacts therein. Each contact comprises a first contacting arm, a second contacting arm and a retaining portion connected between the first and second contacting arms. The first contacting arm comprises a first arcuate portion for electrically a contacting corresponding circuit of an IC card and a first connecting portion connected between the first arcuate portion and the retaining portion. The second contacting arm comprises a second arcuate portion, a soldering portion downwardly extending from the second arcuate portion, a second connecting portion extending from the retaining portion to the soldering portion, and a pair of fixing portions extending from lateral edges of the second connecting portion.