Abstract: A cable assembly (100 comprises an insulative housing (1) having a recess (12) formed on a rear surface thereof; a plurality of contacts (2) disposed in the insulative housing; a printed circuit board (3) having a front portion received into the recess and electrically connected with the plurality of contacts, the printed circuit board having a first PCB and a second PCB stacked together in a manner of back to back; a shielding member (5) enclosing the housing and the printed circuit board; and a cable (4) having a plurality of conductive wires (41) extending into the shielding member and electrically connected to a rear portion of the printed circuit board.

Abstract: Structures, methods, and apparatus that provide connector receptacles that have a reduced tendency to scratch and otherwise mar connector inserts, have an aesthetically-pleasing appearance, have an improved tactile response when inserts are inserted, or are very thin or have a low profile. Various examples reduce scratches and wear by utilizing domes, cylinders, balls, or other structures as finger contacts in a connector receptacle. Another example provides aesthetically-pleasing connector receptacle enclosures by forming receptacle enclosures using the same type of material, or material having the same or similar color or texture, as is used for enclosing the electronic device that includes the receptacle. Another example provides an aesthetically-pleasing receptacle enclosure by forming receptacle enclosures that are, in part or in whole, contiguous or formed with the housing. Another example provides a super-thin connector receptacle by removing fingers and portions of a shell along one or more sides.

Abstract: An electrical connector (100) includes an insulative housing (1) defining a USB port (11) including a tongue portion (12) defining four first recesses (121) receiving four first terminals and one second recess (122) for receiving one second terminal. The four first terminals and the second terminal are arranged side-by-side at a same side of the tongue portion. The second terminal includes a second contact beam having a width smaller than that of a first contact beam of the first terminal.

Abstract: A modular connector plug for high speed applications includes a wire guide filter at least partially situated in the conductor-receiving cavity of the housing of the plug. The wire guide filter includes an impedance containing portion comprising a longitudinally extending body having a plurality of longitudinally extending passageways and an internal cable guide portion comprising a longitudinally extending body defining a plurality of longitudinally extending passageways.

Abstract: A connector is matable with a mating connector. The connector has a contact, a housing, a sliding shell, at least one engagement portion and at least one disengagement portion. The housing holds the contact. The sliding shell covers, at least in part, the contact and the housing. The sliding shell is held on the housing so as to be movable between a mating position and a protective position. The connector is mated with the mating connector when the sliding shell is positioned at the mating position. The sliding shell is laid, at least in part, beyond a front end of the housing when the sliding shell is positioned at the protective position. The at least one engagement portion is configured to engage with the sliding shell located at the protective position so as to prevent the sliding shell from moving toward the mating position.

Abstract: A shield case of the invention includes a receiving portion of generally rectangular tuboid shape adapted to accommodate a body with contacts arrayed, the receiving portion having a top plate and side walls; a folded-back portion, provided at a front end of the receiving portion and folded back rearward, or provided at a rear end of the receiving portion and folded back forward; and a cover of generally downward U-shape, extending from the folded-back portion and along the top plate and the side walls of the receiving portion.

Abstract: An electrical connector includes an insulating housing, a plurality of terminals and a shielding shell. The insulating housing has a base body and a tongue. Two sides of the front surface of the base body define two inserting slots. A propping portion is perpendicularly connected between two face-to-face insides of the inserting slot. The terminals are disposed in the insulating housing respectively. The shielding shell is mounted to the insulating housing, and has a tongue sheath with two side plates. A rear edge of each side plate extends rearward to form a fastening piece with a clipping opening. Two opposite edges of the clipping opening are further concaved oppositely to form a locating opening. The tongue sheath is sleeved around the tongue. The fastening piece is inserted rearward into the corresponding inserting slot, and the propping portion slides along the clipping opening until being buckled into the locating opening.

Abstract: An electrical connector includes an insulative housing, a contact retaining member fixed to the insulative housing and a contact partly extending through the contact retaining member. The contact retaining member is fixed in a passageway defined in the insulative housing. The contact retaining member includes a ring and at least one elastic spring extending forwardly from the ring. The ring is closed along its circumferential direction while is central hollow. The contact includes a contact portion resided in the passageway and a fixing portion extending through the ring and the elastic spring under a condition that the fixing portion abuts against a free end of the elastic spring to limit backwardly removal of the contact.

Abstract: An electrical shielding arrangement of a high-voltage line has at least two coupling elements. The coupling elements each have a tubular control electrode about a line leadthrough and are surrounded by a barrier. Owing to the fact that the reduction in the diameters of the control electrode and the barrier is matched in relation to one another, a barrier decoupled in this way can be used for mechanically tensioning the coupling systems which have been pushed one inside the other.

Abstract: A low profile connector for mounting on a PCB comprising: an insulative housing, a plurality of terminals, a shielding shell and an auxiliary member. Each terminal is provided with a contacting section and a solder portion extending beyond insulative housing for connecting with the PCB. The shielding shell defines a mating opening surrounding the contact portion, and the auxiliary member defines a main portion attached to a bottom surface of the shielding shell and at least one horizontal portion located at one end thereof for mounting on an upper surface of the PCB. The shielding shell further includes a vertical portion perpendicular to the horizontal portion for inserting a hole of the PCB, and the horizontal portion of the auxiliary member has a concavity for receiving the vertical portion which decreasing space that the connector located on the PCB.

Abstract: A connector shield case having a tubular shape and is attached to a housing having a plurality of terminals to thereby surround the terminals. The connector shield case is formed by bending a metal blank having a predetermined shape. The connector shield case comprises a ceiling plate portion, side wall portions extending downward from corresponding opposite side ends of the ceiling plate portion, mounting projecting-leg portions extending downward from each of the side wall portions, a bottom plate support portion connecting, at opposite ends, with the side wall portions and a bottom plate portion in parallel with the ceiling plate portion and connecting with the bottom plate support portion via a bend portion. With respect to the front-rear direction, the bottom plate portion overlaps in position with at least one of the mounting projecting-leg portions.

Abstract: Receptacle connectors and male plug connectors having a reduced size in at least one direction can be provided. One example reduces height by not including a center contact tab or tongue, but instead places contacts on an insulator that is adjacent to a bottom portion of the receptacle. Another example may reduce width by reducing contact pitch, and may use a particular shape of contact to achieve god signal quality. Receptacle connectors and male plug connectors can also provide support for one or more new high-speed communication standards, such as USB 3.0 and DisplayPort. Methods can provide one or more standardized connector components to speed connector design and manufacture of new electronic devices such as media players, thus reducing their time to market.

Abstract: An electrical connector has an insulative housing, a plurality of terminals and a metal shell. The terminals are mounted through the insulative housing and each terminal has a mounting section, a contacting section and a soldering section. The soldering sections of all the terminals are arranged in triangular patterns. Each soldering section is located in a tip of one triangular pattern. Distances between one soldering section and adjacent soldering sections are substantially identical. The triangular patterns of the soldering section stabilize the impedance of the operating electrical connector. Therefore, the electrical connector is stable and reliable.

Abstract: The present invention provides a computer port interface apparatus having a compound swivel. The apparatus comprises: a computer port connecter portion configured for mated coupling with a computer port, a compound swivel portion, and a peripheral portion operatively coupled to the computer port connector portion. The peripheral portion may include an integral peripheral device or a connector for mated coupling with a device. The computer port connector portion and peripheral portion extend at angles from opposing ends of the compound swivel portion. The compound swivel portion comprises two or more swivels in series. Each swivel is operatively coupled to a swivel stop assembly configured to limit relative rotation of the swivel to a predetermined range. Swivelling allows reorientation of the peripheral portion and a device coupled thereto to facilitate operation. Swivel stop assemblies protect portions of the apparatus and/or facilitate operation.

Abstract: A backplane electrical connector having a pin header that includes a one-piece housing supporting a plurality of columns of edge coupled differential signal pairs of contacts each separated by a ground contact. The pin header housing base is formed with a plurality of air passageways extending through the base, including an air passageway disposed between each signal contact in one column and an immediately adjacent signal contact in an adjacent column for electrically isolating the adjacent signal contacts from each other by an air dielectric medium. Core-outs which extend only partially through the housing base are provided between each signal contact and an adjacent ground contact in an adjacent column for further isolating differential signal pairs.

Abstract: A connector assembly includes a contact module comprising a lead frame having contacts defining separate conductive paths. The contact module also includes a compensation component coupled to selected contacts and affecting signals transmitted along the conductive paths of the selected contacts. The contact module also includes a body overmolded over the contacts and the compensation component.

Abstract: An advanced modular plug connector assembly incorporating an insert assembly disposed in the rear portion of the connector housing. In one embodiment, the connector has a plurality of ports in multi-row configuration, and the insert assembly includes a substrate adapted to receive one or more electronic components such as choke coils, transformers, or other signal conditioning elements or magnetics. The substrate also interfaces with the conductors of two modular ports of the connector, and is removable from the housing such that an insert assembly of a different electronics or terminal configuration can be substituted therefor. In this fashion, the connector can be configured to a plurality of different standards (e.g., Gigabit Ethernet and 10/100). In yet another embodiment, the connector assembly comprises a plurality of light sources (e.g., LEDs) received within the housing. Methods for manufacturing the aforementioned embodiments are also disclosed.

Abstract: An electrical cable connector assembly comprises a metallic shell defining a receiving space and a rear wall enclosing the receiving space, a printed circuit board retained in the receiving space, an electrical connector including an insulative housing and a plurality of contacts retained in the insulative housing, and a cable located behind the printed circuit board and including a wire extending into the receiving space to be soldered on the printed circuit board. The contacts each defines a soldering tail soldered to the printed circuit board. Wherein the rear wall defines a cable ring deep drawn rearwardly therefrom to cover the cable.

Abstract: A shield connector (100) includes a metallic shell (3) with a mating port (331) in communication with a mating receptacle with a tongue having a plurality of contact terminals (2) thereon. The contact terminals (2) include a plurality of solder tails (213, 223) extending out of the metallic shell (3). The metallic shell (3) defines a level arrangement (35) adjacent to the mating port (331) and defining a supporting plane coplanar to a mounting interface (5) of the shield connector (100).

Abstract: A shielding cage for receiving a plurality of electronic modules includes a bottom cage portion and a plurality of independent upper cage portions each one of which comprising a top wall and two lateral walls adapted to cooperate with the bottom cage portion. Furthermore, each of said upper cage portions defines with the bottom cage portion a respective compartment having an inner cavity for receiving an electronic module, and a subdivision of said bottom cage portion provides for a bottom wall of said compartment.

Abstract: An electrical connector includes an insulative housing having a longitude base with a plurality of contacts retained therein in a first direction, a pair of opposite arms extending from ends of the longitude base in the first direction and a shielding shell includes a top plate and a bottom plate covering on the housing. A receiving space is enclosed with the top plate, the bottom plate of the shielding shell and the pair of arms of the insulative housing. An arm-limited means is unitarily formed on the shell to abut against inside face of the pair of arms.

Abstract: A crosstalk-proof plug connector has an insulating housing, a mounting bracket, multiple first terminals, multiple second terminals and a shell. The first terminals are mounted on the insulating housing. The second terminals are mounted on the mounting bracket. Each terminal has a mounting section, a soldering section and a contacting section. The soldering sections are arranged in a transverse row with a specific sequence to prevent crosstalk interfering with signal transmission.

Abstract: A shielding connector has a housing (20) accommodating female terminals (15) connected to electric wires (10). The housing (20) is inserted in a die cast tubular shielding shell (40). An elastic locking piece (34) is provided on the housing (20) and locks an open edge (48) of the shielding shell (40) to prevent removal of the housing (20) that has been mounted properly in the housing (20). A retainer (50) is mounted on the housing (20) from the rear and prevents the elastic locking piece (34) from flexibly displacing in an unlocking direction. An open end (70A) of a braided wire (70) is placed on a mounting groove (46) formed on the shielding shell (40) and is fixed to the mounting groove (46) with a tightening band (60) whose diameter can be decreased with a tool.

Abstract: A connector and cable assembly is disclosed that provides a means to protect another piece of electronic hardware in a system from disruptions due to electromagnetic interference by introducing an appropriate filtering element to the connector filter assembly, external to the affected electronic hardware, eliminating the need to redesign the hardware. The assembly can also accommodate a circuit breaker in one embodiment of the invention.

Abstract: A shield connector (40) includes a housing with a base (45) to be mounted into a metallic mating member. A connector fitting (51) is formed on a top side of the base (45) and a mounting projection (100) is formed on an under side of the base (45). A shield shell (140) is mounted between an inner tube (53) and an outer tube (54) of the connector fitting (51). A nut accommodating portion (110) is formed in the mounting projection (100) of the housing (41) and a nut 160 is mounted in the nut accommodating portion (110) to be freely movable in the longitudinal direction. A connecting portion (145) extends to close an opening of the nut accommodating portion (110) while being bent sideways at a rear end of the shield shell (140) in the longitudinal direction.

Abstract: An electrical cable connector assembly includes a printed circuit board, a wire organizer comprising a body portion defining a plurality of through holes and a retention slot recessed from an outer surface thereof, and a cable including a plurality of wires protruding through the through holes of the wire organizer for being soldered to the corresponding conductive pads of the printed circuit board, respectively. The printed circuit board has an outer side edge, and a plurality of conductive pads arranged at opposite front and rear ends thereof. The wires The outer side edge of the printed circuit board is retained into the retention slot of the wire organizer for preventing the printed circuit board from moving relative to the wires.

Abstract: The present invention relates to an improved electrical connector adapted to transmit high-definition (HD) digital images. The improved electrical connector comprises a body, a first terminal assembly, a second terminal assembly, a first terminal connecting device, a second terminal connecting device, a first housing and a second housing. The first terminal assembly and the second terminal assembly are adapted to transmit signals, and by using the first housing and the second housing to cover the first terminal assembly and the second terminal assembly simultaneously, the problem of electromagnetic interference (EMI) suffered by the first terminal assembly and the second terminal assembly during high-frequency transmission is obviated, thereby improving the electromagnetic disturbance susceptibility thereof.

Abstract: An electric connector that is configured simply and makes it possible to achieve thinning or downsizing excellently as well as improves electric connection reliability by preventing deformation at a fitting time to a mating connector.

Abstract: A wire containment cap has twisted pair slots for routing twisted wire pairs through the wire containment cap. The twisted pair slots are provided with funnel-shaped entrances to assist in routing the twisted wire pairs from a rear end of the wire containment cap toward wire slots of the wire containment cap. The wire containment cap may be provided in shielded or unshielded versions, and is adapted for use with a communication jack assembly.

Abstract: A camera socket (100) includes a metallic housing (40) defining a receiving space (101), a contact terminal insert disposed within the metallic housing (40) and including a plurality of contact terminals (30) integrally formed with an insulative housing (20) and arranged in an array. Each contact terminal (30) includes a fold-back contact engaging arm (34) extending backwardly and offset from a main portion (33) of the contact terminal (30) in a way such that a free end (341) of each of the contact engaging arm is located adjacent to a sidewall (41) of the metallic housing (40) for engaging with a camera module (100a).

Abstract: A battery connector includes an insulating housing defining a receiving chamber cutting through a front and a bottom thereof, an electric terminal received in the receiving chamber and a shield shell encircling the insulating housing and spaced from the receiving chamber. The electric terminal has a base portion disposed uprightly in a rear of the receiving chamber, a contact portion extended beyond the front of the insulating housing for contacting an external battery, and a resilient portion connecting the base portion and the contact portion. A bottom of base portion is extended to form a solder portion which includes an L-shaped main body extended downward from a middle of the bottom of the base portion and two supporting bodies extended oppositely from two opposite sides of a horizontal part of the main body.

Abstract: The invention provides a connector including a shield case having a body containing portion; first and second bodies, contained in the body containing portion and combined; first contacts, embedded in the first body and arranged in a row; and second contacts, embedded in the second body and arranged in a different row. The body containing portion includes a top plate, a bottom plate and a pair of side plates. At least one plate of the top plate, the bottom plate and the side plates is smaller in length than the other plates, and a back surface of the one plate functions as an abutting stop surface on which the first body abuts. A back surface of at least one of the other plates is provided with a lock piece, and the first and second bodies are sandwiched between the abutting stop surface and the lock piece.

Abstract: A cable assembly includes an insulative housing, a number of contacts retained in the insulative housing and a metal shell covering the housing to form a receiving space with the tongue portion for receiving an electrical plug. The housing has a base portion and a tongue portion extending forwardly from the base portion. The contacts consist of two pairs of differential signal contacts and a pair of grounding contacts between the two pairs of differential signal contacts. Each contact has a contact portion. All contact portions are arranged in a row on one side of the tongue portion.

Abstract: A shield case of the invention includes a base of a generally U-shape in front view having widthwise end portions, the end portions each having a front surface and a back surface; a pair of folded-back portions, provided on the front the back surfaces of the end portions of the base and folded back backward, or alternatively provided on the back surfaces of the end portions of the base and folded back forward; a pair of side walls, extending from the folded-back portions along a length of the end portions of the base; a pair of first locking pieces, extending downward from the side walls; and a linking portion adapted to link between the side walls. The base, the side walls, and the linking portion define a body containing portion.

Abstract: An electrical connector system includes an electrical connector and a plurality of termination devices. The electrical connector includes an insulative support wafer, a plurality of interlocking plates attached to the support wafer and defining a plurality of cavities, and at least one electrical contact positioned within a cavity. Each cavity is sized for accepting a termination device. At least one of the interlocking plates is electrically conductive. The at least one electrical contact is supported by the support wafer, electrically isolated from the interlocking plates, and configured to mate with a socket contact of the termination device. Each termination device includes an electrically conductive outer shield element having a front end and a back end, the shield element having a latch member extending therefrom, an insulator disposed within the shield element, and a socket contact supported within and electrically isolated from the shield element by the insulator.

Abstract: An electrical connector includes an insulative housing (1) defining a chamber (1150); a set of contacts (2, 3) retained in the insulative housing, the contacts including a set of first type of contacts (32, 33, 34, 35) having contacting portions (302) exposed to the chamber and each being positioned horizontally, and a set of second type of contacts (31, 36) having contacting portions (302) exposed to the chamber and each being positioned vertically, at least one of the first type of contacts having a shorting bridge (304, 305) integrally connecting with one of the second type of contacts and having a tail portion (303) co-owned with the one of the second type of contacts for being soldered; and a metal shell (6) enclosing the insulative housing.

Abstract: A connector assembly includes an array of signal contacts having mating portions configured for mating engagement with corresponding signal contacts of a mating connector assembly. The assembly also includes a housing holding the array of signal contacts in rows and columns. The signal contacts are arranged along axes of the rows and columns, and the mating portions of the signal contacts are oriented at a non-orthogonal angle relative to the axes of the rows and columns.

Abstract: A Universal Serial Bus (USB) memory card includes a tube metal housing that is rectangularly-shaped and a Chip-On-Board (COB)-Universal Serial Bus (USB) device and a carrier substrate having a U-block disposed on one side of thereof and vertically extending upwardly from a bottom surface of the U-block, the COB-USB device positioned on the carrier substrate forming a USB card sub-assembly, the USB card sub-assembly being securely located inside the metal housing with the U-block serving to stop the COB-USB device from slipping out of the metal housing.

Abstract: An electric assembly includes a circuit board and an electric connector. The circuit board comprises a first surface and a second surface opposite thereto. The electric connector includes a metallic case, an insulating base, first leads and second leads. The insulating base is connected with the metallic case. The first leads are disposed on the insulating base and soldered to the first surface. The first leads includes a pair of first differential signal leads, a pair of second differential signal leads and a ground lead located between the pair of first differential signal leads and the pair of second differential signal leads. The second leads are disposed on the insulating base and soldered to the second surface. The second leads include a power lead, a second ground lead and a pair of third differential signal leads located between the power lead and the second ground lead.

Abstract: An improved Universal Serial Bus (USB) connector mounted on a print circuit board for transmitting electric signals between a dock connector and the print circuit board. The improved Universal Serial Bus connector comprises a set of first terminals, a set of second terminals, an insulator, and a shielding shell. Each of the first terminals and the second terminals is respectively fixed on the insulator. The insulator includes a cap, on which each of the first terminals and the second terminals is disposed, and is substantially enclosed by the shielding shell.

Abstract: Disclosed is a connector, comprising: a shell provided as a cylindrical shape having an opened front side; a first insulator arranged in the shell; a second insulator arranged in the shell to be parallel to the first insulator; a first contact provided to be arranged in the first insulator; a second contact provided to be arranged in the second insulator; and a partition section arranged in the shell in a state of projecting from an outside of the shell to an inside of the shell so as to partition a hollow in the shell to a first region in which the first insulator exists and a second region in which the second insulator exists as viewed from the front side of the shell, the partition section being provided to be movable to the outside of the shell.

Abstract: A housing structure for pluggable transceiver module includes a case being internally provided with a plurality of vertical partitioning plates, and having first protrusions provided on an upper and a lower side of a free edge at an open end of the case, and second protrusions provided on two opposite sides of a free end of each of the partitioning plates at the open end of the case; a plurality of first elastic-leaf members being clamped to the free edge of the case and having retaining holes engaged with the first protrusions; and a plurality of second elastic-leaf members being clamped to the free ends of the partitioning plates and having retaining holes engaged with the second protrusions. Therefore, the first and second elastic-leaf members are easily and securely assembled to the case and the partitioning plates via the first and second protrusions, respectively, without the need of spot welding.

Abstract: The invention concerns an electronic module for converting electrical voltage that is intended to supply a light source, which comprises: a horizontal printed circuit card; at least one top connector fixed to the top face of the printed circuit card; an electromagnetic shielding jacket fixed to the connector; characterised in that the jacket comprises a bottom fixing lug that extends horizontally so as to be pressed on the top face of the printed circuit card, the connector being fixed to the card by means of the fixing lug.

Abstract: An electrical connector (100), includes an insulative housing (10), a plurality of conductive contacts (20) retained in the insulative housing, an insulative base (60) secured to the insulative housing, a subsidiary printed circuit board (30) connecting with the conductive contacts, a flexible printed circuit board (50) electrically connecting with the subsidiary printed circuit board, and a shielding shell (70) shielding peripherally around the insulative housing and the insulative base. The subsidiary printed circuit board is attached to the insulative base. A gap (609) is defined between a portion of the insulative base and an edge of the subsidiary printed circuit board. The flexible printed circuit board has a first strip portion (503) extending out of the insulative base, a second strip portion (501) connecting with the subsidiary printed circuit board, and a folded portion (505) between the two strip portions. The folded portion is received in the gap.

Abstract: A differential pair connector has a housing floor, an array of differential pairs passing through the housing floor, and a conductive grid integrated into the housing floor for reducing crosstalk between the differential pairs. The conductive grid can have various structures, such as conductive inserts, plated regions and/or a conductive housing floor surrounding non-conductive inserts protecting the differential pins. Although any suitable means can be used to fasten the conductive grid into the housing floor, the grid is preferably press fitted into the top of the housing floor.

Abstract: A cable connector assembly, for mating with a complementary connector, includes a cable having a number of wires; and a connector comprising a contact module connected with the wires, a mounting ring attached to the cable, and a shielding shell attached to the mounting ring. The shielding shell and the mounting ring both have a number of screw threads to match with each other. An associated method of manufacturing the cable connector assembly comprises screwing the shielding shell onto the mounting ring.

Abstract: A connector (100) having a chamber (101) for insertion of a plug includes an insulative housing having a base portion (11), a tongue plate protruding forwardly into the chamber, a standoff (13) located below the base portion (11) and extending forwardly, and a cavity (15) formed between a lower surface of the base portion and an upper surface of the standoff, the standoff (13) having an opening (136) passing therethrough along a height direction of the connector and communicating with the cavity (15) for exposing key point of the lower surface to exterior; a set of contacts (3) retained in the tongue plate for mating with the plug; and a metal shell (5) assembled to the insulative housing and supported upwardly by the standoff (13), the metal shell having a bottom wall (53) received in the cavity (15).

Abstract: An electrical connector (100a) includes an insulative housing (1) defining an engaging portion (11) extending from a base portion (10) thereof, a plurality of terminals (2) disposed in the housing (1) and having a contacting portion (20) arranged on the engaging portion (11) and a shell (3) covering an outside of the insulative housing (1). The shell (3) includes at least one forniciform-shaped grounding arm (32) which integrally extends from a first side (11b) of the engaging portion (11) forwardly and is continually folded backwards to a second side (11a) of the engaging portion (11) opposite to the first side (11b).

Abstract: The present invention relates to an improved a shielded contactor having an insulative material or proxy (9a, 9b) for making reliable electrical contact. Accordingly, the length of the assembled contactor is totally surrounded by conductive material, thereby providing shielding element. Resultantly, the present invention has the capability of eliminating impedance mismatch during the signal transmission.

Abstract: A receptacle connector includes an insulating body having a base portion, and a shell enclosing the insulating body. Two opposite side surfaces of the base portion respectively define an inserting passage extending longitudinally and having a front end opened freely. A front of each inserting passage is provided with a preventing block. A fixing cavity is formed in a rear of the inserting passage by the partition of the preventing block. The preventing block has a guiding surface inclined outward from front to rear. The shell has two side boards against the corresponding side surfaces of the base portion. Two fixing portions are protruded inwardly from two substantially corresponding portions of two bottom edges of the side boards for gliding along the corresponding guiding surfaces in the respective inserting passages to buckle into the corresponding fixing cavities and then restrained by the preventing blocks in the fixing cavities.