Abstract: An electrical connector with an electrically insulating elastic body is disclosed, comprising an electrically insulating elastic body and a multiple of electrical pieces inclinedly disposed in the electrically insulating elastic body. When the electrical connector is compressively contacted with external electronic devices, the electrical pieces will undergo rotating displacement; when the external electronic devices retreat from the compressive contact, the electrically insulating elastic body will push the electrical pieces back to their original positions. Compared with conventional prior art, the electrical piece of the electrical connector according to present invention can undergo rotating displacement to enable the electrical pieces to have larger elastic deformation, such that good contact can be ensured when the flatness of the connected electronic devices is poor and larger normal force on the electrical pieces can be obtained.

Abstract: An electrical connector assembly comprising a plurality of electrical connectors arranged side-by-side and including at least partially superimposed mounting flanges.

Abstract: To prevent damage to a printed circuit board due to concentration of contact pressure during press-fitting of press-fit contacts into through-holes of the board with narrow pitches, a press-fit contact includes a bulge portion formed wide substantially at a center in a long direction thereof, a press-fit portion extending from one end of the bulge portion and projecting in an arc in a width direction of the press-fit contact, a contact portion extending from the other end of the bulge portion, and an introduction portion extending from a distal end of the press-fit portion. A center portion of the press-fit portion in the long direction thereof, when adjacent press-fit contacts are provided in alignment with a line, has a direction of expansion that is not parallel to the line but is angled so as to be rotated about an axis of the center portion at a predetermined angle.

Abstract: A universal slot disposed on a base plate includes a first slot and a second slot. The first slot has a first electrical characteristic, and the second slot has a second electrical characteristic. The second slot covers the first slot in appearance.

Abstract: An electrically conductive mounting/grounding clip, for use with a photovoltaic assembly of the type having an electrically conductive frame, comprises an electrically conductive body. The body has a central portion and first and second spaced-apart arms extending generally perpendicular to the central portion. Each arm has an outer portion with each outer portion having an outer end. At least one frame surface-disrupting element is at each outer end. The central portion defines a plane with the frame surface-disrupting elements pointing towards the plane. In some examples each arm extends from the central portion at an acute angle to the plane.

Abstract: A fixing mechanism includes a receptacle for receiving a component. A pair of spaced rails is formed in the receptacle and defining a slideway therebetween. A latch member is movable along the slideway. A resilient member is installed adjacent the slideway and engagable with the latch member to urge the latch member forward for fixing the component and to assist in urging the latch member backward when the latch member is operated to unfix the component.

Abstract: In a connector substrate to which are soldered input terminals of a speaker and lead wires connected to an output terminal of a printed circuit board, the connector substrate is flat and approximately rectangular, and snap-off portions for, by being snapped off in a predetermined size, moving extreme positions of a longitudinal direction of the connector substrate, by a predetermined distance, toward an opposite extreme, are formed at either extreme of the longitudinal direction of the connector substrate.

Abstract: An electronic device (10) includes a circuit board (40) and a shield (20). The circuit board includes a pair of mounting holes (44), a first surface (41), a second surface (43) opposite to the first surface, and at least one electronic component (42). The shield includes a top wall (26), a pair of first sidewalls (22), a pair of second sidewalls (24) opposite to the first sidewalls, and a pair of mounting members (23). The top wall, the first sidewalls, and the second sidewalls cooperatively bound a receiving portion (28) for receiving the electronic component. The mounting members extend respectively from the first sidewalls toward the circuit board corresponding to the mounting holes of the circuit board. At least one gap (220) is formed between each of the mounting members and each of the first sidewalls.

Abstract: The invention has an object of providing a connector for connecting between a printed circuit board and a test device, capable of easily attaching and detaching the connector at low cost. The connector includes at least one conducting pin 28 that is protruded from a connector body, and at least one fixing pin 30 that is extended substantially in parallel with the conducting pin. The fixing pin 30 is longer than the conducting pin 28.

Abstract: A sinking electrical card connector includes an insulating housing (10) sinking partially into a hole defined on a printed circuit board (30) (PCB), a number of terminals (20) retained in the insulating housing, a shell (40) mounted on the insulating housing, wherein a pair of holding portions 120 and 120? are formed by the opposite lateral walls of the insulating housing extending outwardly, and each holding portion engages with an edge of the hole of the PCB.

Abstract: A connecting device has a locking mechanism for locking fitting between a first connecting member and a mating side. The locking mechanism has a first elastic body and a second elastic body. The first elastic body has a first contact portion adapted to contact the mating side. The second elastic body has a second contact portion adapted to contact the mating side. At least one of the first elastic body and the second elastic body has a locking portion adapted to lock fitting to the mating side.

Abstract: A connector includes an insulating body, terminals received in the insulating body, an electrical shell covering the insulating body and two welding pieces. The electrical shell includes a top board, a bottom board and two side boards. Each of the side boards defines a first gap at the upside of the back end. Two sides of the top board protrude to form a first withstanding piece. A second withstanding piece extends outwards from a lower portion of the side board. Each of the welding pieces includes a welding part. The front end of the welding part extends outwards to form a connecting part. The top of the back of the welding part defines a second gap, the front of the second gap forms a block wall. The back of the welding part extends inwards to form a raised lump under the second gap. The back of the welding part extends downwards to form a limitative lump. The first withstanding piece places in the second gap and is against the block wall.

Abstract: A lamp sockets guide is provided which includes a lamp sockets receiving and fastening portion for alignably receiving and retaining a plurality of lamp sockets and an inverter cover portion formed at one side of the lamp sockets receiving and fastening portion to protect an inverter, wherein the lamp sockets receiving and fastening portion and the inverter cover portion are integrally formed.

Abstract: A head stack assembly (HSA) that may eliminate the need for a plurality of separate components by molding all of the HSA parts together into a single connector is disclosed. Such an HSA may include a single connector having a mating interface and a fastener extending from a surface of the connector, a flex circuit attached to the connector, and a gasket seal placed on the upper surface of the connector. The fasteners may be compliant pegs that are pressed into a disc housing, thereby holding the gasket and connector in place. When the HSA is correctly oriented, the mating interface of the connector may mate with a printed circuit board (PCB) mount connector. Because a number of HSA components are molded into a single-piece connector, metal screws may not be required, thereby reducing the loading forces and warp on the PCB.

Abstract: A connector (1, 101) includes: terminals (3) electrically connected to a board (P); fastening metal fittings (4) mechanically, fixedly fastened to the board (P); and a connector main body (2), the terminals (3) and the fastening metal fittings (4) being fixedly fastened to the connector main body (2) to have a predetermined positional relationship; in which each of the fastening metal fittings (4) has a positioning portion (13) fixedly fastened to the connector main body (2), and a claw portion (14) having a single protrusion shape, the claw portions (14) being inserted through fastening hole portions of the board (P), thereby preventing the connector (1, 101) from dropping out from the fastening hole portions.

Abstract: An apparatus for supporting at least one electrical connector body, the apparatus includes a connector housing mountable to a printed circuit board (PCB). The connector housing includes at least one base member for attachment to the PCB; and at least one support post each spaced apart from one another and extending from the at least one base member. The support posts inserted into one or more clearance holes in the PCB are configured to receive the one or more support posts. When a lateral force is applied to the connector body, the support posts acts as a support and transfers the lateral force to the PCB, thereby reducing a rotational moment at a base of each connector body connected to the PCB.

Abstract: A device for securing a cable plug within a socket of an apparatus such as a USB plug within the USB port of a computer. A housing having an interior chamber is placed over the plug by sliding the cord through an axial slot formed in the housing, with the plug cord extending through an end opening of the housing. A retainer clip or collar having a U-shaped channel formed about an inner end periphery is slid over and along the housing and mates with a complementary shaped channel formed in the housing to lock the clip and housing together. A pair of adhesive pads are mounted on the ends of the pair of arms extending outwardly from the retaining clip for attachment to the apparatus adjacent the plug receiving socket.

Abstract: A terminal has a plurality of split solder portions inserted into through-holes in a printed circuit board. A first split solder portion has a cross-sectional shape such that four corners thereof contact an inner circumferential surface of the through hole for positioning, while a second split solder portion has a cross-sectional shape such that the portion is loosely inserted into the through hole without contacting an inner circumferential surface thereof. The plurality of split solder portions of the terminal are inserted into through holes having substantially equal diameters. The four corners of the first split solder portion contact the inner circumferential surface of the through hole for positioning and holding. The second split solder portion does not contact the inner circumferential surface of the through hole. The through holes are filled with solder to fix the split solder portions therein.

Abstract: In a fixation structure for fixing a lamp on a printed circuit board (PCB), a connection end of the lamp is received within a connection hole of the PCB and a reed having approximately cone shape is disposed between the lamp and the PCB. When the connection end of the lamp is continuously inserted into the connection hole of the PCB, a contact area between the connection end and the connection hole is increased, thereby effectively enhancing a contact-and-on performance of the lamp and the PCB.

Abstract: The fixing member of the present invention can be mounted to a fixed member that is fixed to a printed circuit board and that is used for fixing the fixed member to the printed circuit board, the fixing member including: a mounting member main body fixed to the fixed member; male connector portions having at tip ends thereof lug portions that are engaged with an opening edge of an insertion opening in the printed circuit board when inserted into the inserting opening; and contact portions that contact with a soldering land formed at the printed circuit board and are joined to the soldering land by soldering when the lug portions are engaged with the opening edge, the contact portions being formed at the mounting portion main body and the male connector portions extend arm-shaped from the mounting portion main body or from the contact portions.

Abstract: An electrical connector (100) includes an insulative housing (10), a number of contacts (20) retained in the insulative housing, a metal shell (30) shielding the insulative housing, and a pair of board locks (40). The insulative housing has a body portion (11) and a mating portion (12). The body portion defines a pair of receiving spaces (14) extending therethrough. Each board lock has a first plate (41) with a hollow cylinder (44) and a hook section (42) extending out of the insulative housing. The metal shell defines a pair of through holes (33) corresponding to the hollow cylinders respectively. The metal shell and the insulative housing sandwich the first plates of the board locks therebetween.

Abstract: A fixing part (12) has two resiliently deformable legs (18) separated by a slot (17). A locking projection (19) is formed at a distal end (19C) of the fixing part (12) and has a locking surface (19A) spaced from the distal end (19C). A maximum cross-sectional dimension (A) of the fixing part (12) at the locking surface (19A) exceeds the diameter (d) of a through-hole (71) in a substrate (70). A tapered sliding-contact surface (19B) extends from the locking surface (19A) to the distal end (19C). Noncontact surfaces (21) are at opposite circumferential ends of each sliding contact surface (19B) and substantially adjacent the slot (17). The noncontact surfaces (22) of each locking projection (19) are spaced from one another at the slot (17) by distances that are no greater than the diameter (d) of the through-hole (71).

Abstract: A connector for use in a USB application includes a body having a USB “A” type receptacle at a front section of the body and a terminal block at a rear section of the body. The body has a keystone connector mounting form-factor. Alternatively, body has a first end section and an opposite second end section, wherein the first end section has a USB “A” type receptacle and the second end section has a USB “B” type receptacle.

Abstract: An adapter module is provided with a bail latch mechanism that serves to engage and disengage the frame into which the adapter module fits. The bail latch is movable between two positions and it engages a cam member formed as part of the module that cams two opposing free ends of the bail latch inwardly into the module to thereby release it from the adapter frame. The adapter frame includes a wear sleeve that cams the bail latch free ends inwardly during some insertions of the module. C-shaped press fit pins are made with the adapter frame for better engagement with the circuit board.

Abstract: A fixing member of the present invention can be mounted to a fixed member that is fixed to a printed circuit board, and is used for fixing the fixed member to the printed circuit board, the fixing member including: a male connector portion inserted into an insertion opening formed in the printed circuit board; a plurality of arm portions provided at the male connector portion; lug portions provided at each tip end side of the arm portions and engaged with an opening edge of the insertion opening; and a lug-guiding portion extending out from a tip end portion of at least one lug portion to guide the lug portion to the insertion opening when the lug-guiding portion comes in contact with the opening edge and is further pressed.

Abstract: A component electrical coupling apparatus includes a board comprising a first surface and a second surface located opposite the first surface. A first surface mount technology connector is coupled to the first surface of the board. A second surface mount technology connector is coupled to the second surface of the board and located immediately opposite the first surface mount technology connector, the second surface mount technology connector operable to couple to a different type of connector than the first surface mount technology connector. The component electrical coupling apparatus may be coupled to a component and to an information handling system to allow the component having a connector to be coupled to an information handling system having a different type of connector than the component.

Abstract: In a connector to be mounted to a substrate, a strengthening member is coupled to a housing holding a contact The strengthening member is adapted to fix the housing to the substrate and includes a side plate portion extending in a direction away from the substrate in a state where the connector is mounted to the substrate, a top plate portion adjacent to the side plate portion and faced to the substrate, and first and second mounting portions to be attached to the substrate, The first mounting portion extends from an end of the side plate portion adjacent to the substrate in a widthwise direction of the housing perpendicular to a fitting direction in which a mating connector is fitted to the connector. The second mounting portion extends from the top plate portion at a side opposite to a fitting side to be fitted to the mating connector.

Abstract: A connector with a locator, which prevents cracks at solder connected portions between pin contacts and a circuit board, prevents noise even in use in an environment with vibrations, and prevents deformation of the pin contacts is provided. The connector includes a plurality of pin contacts, a housing that houses and retains the rear ends of the pin contacts while leading out the front ends of the pin contacts in the same direction, and a resin-made plate-shaped locator that is attached to the housing and has a plurality of insertion holes for inserting the pin contacts to regulate the leading-out directions of the front ends of the pin contacts, wherein the locator is attached in contact with the housing side surface while its side end surface is in a warped condition.

Abstract: Disclosed are a camera module and a camera module assembly. The camera module can include a Printed Circuit Board (PCB) provided on an outer side thereof with contact terminals connected to a corresponding socket module, an image sensor mounted on the PCB, and a housing disposed on the PCB. The camera module assembly includes a camera module provided on a lower surface thereof with contact terminals, and a socket module in which the camera module is coupled.

Abstract: A circuit board assembly includes a motherboard defining a motherboard plane, and a daughter board defining a daughter board plane which is substantially parallel to the motherboard plane. The motherboard and the daughter board electrically connect to each other through a set of circuit board connectors. The circuit board assembly further includes a set of edge clips. Each edge clip extends outwardly from the daughter board along the daughter board plane and is configured to operate as a mounting platform through which to physically secure the daughter board to the motherboard.

Abstract: An electrical connector to interpose between a first electrical device and a second electrical device each having a plurality of conductive pads to electrically, the electrical connector comprising a housing carrying a plurality of conductive elements, each conductive element including a first contact region for engagement with a conductive pad of the first electrical device and a second contact region for engagement with a conductive pad of the second electrical device. The conductive elements are carried by the housing to present at least the first contact region for compressive engagement with the surface of the first electrical device.

Abstract: An electrically conductive mounting/grounding clip, for use with a PV assembly of the type having an electrically conductive frame, comprises an electrically conductive body. The body has a central portion and first and second spaced-apart arms extending generally perpendicular to the central portion. Each arm has an outer portion with each outer portion having an outer end. At least one frame surface-disrupting element is at each outer end. The central portion defines a plane with the frame surface-disrupting elements pointing towards the plane. In some examples each arm extends from the central portion at an acute angle to the plane.

Abstract: A board-mounting device (20) which includes a base carrier (10) that can be snapped down on a board (14). The base carrier (10) includes at least one locking hook (22) which engages behind the board (14) in the mounted condition of the device (20). The device (20) further includes a device carrier (11), connected with the base carrier (10), which is adapted to be moved relative to the base carrier (10). The locking hook (22) is provided with at least one shoulder (43) on which the device carrier (11) is supported by at least one guide pin (31, 40, 50, 60) before the device (20) is in its mounted condition.

Abstract: The optical receptacle according to the present invention is attached to a printed board and an optical plug can be connected thereto. The optical receptacle comprises a tubular main housing and a socket housing which is inserted into and attached to the main housing. The main housing has an elastic locking part which protrudes from the outer circumference surface and locks onto the printed board, and the socket housing has a locking slotted pin which protrudes from the outer circumference surface and locks onto the printed board. This optical receptacle is attached to the printed board after the two pieces, the main housing and the socket housing, are assembled. As a result, the construction of the optical receptacle can be simplified because ground pins become unnecessary. Additionally, the optical receptacle can be easily attached to a printed board because it does not have to be welded onto the printed board with the ground pins.

Abstract: A flat earth terminal in the shape of a flat plate comprising a main part with a screw insertion hole and a leg-like terminal part continuously extending from an end of the main part, wherein a recess is formed on a mounting side of the flat earth terminal intended to be located on a printed circuit board, in a proximal portion of the terminal part continuously extending from the main part, to separate a distal portion of the terminal part from the main part. By this, solder is prevented from flowing from the terminal part to the main part, with certainty, so that a stable electric connection between the main part and the printed circuit board is ensured.

Abstract: According to an embodiment, a circuit board device comprises a circuit board having a first surface and a second surface opposed thereto, a first electronic component mounted on the first surface of the circuit board, a stud set up on the first surface of the circuit board and fastened to the circuit board by a stud fixing screw threaded therein from the second surface side, a heat radiating member which is thermally connected to the first electronic component and radiates heat from the first electronic component, and a pressing member which is screwed to the stud from the first surface side of the circuit board and presses the heat radiating member against the first electronic component. A second electronic component is located on the second surface of the circuit board so as to overlap the stud fixing screw.

Abstract: A fixing member of the present invention can be mounted to a fixed member that is fixed to a printed circuit board, and is used for fixing the fixed member to the printed circuit board, the fixing member including: a male connector portion inserted into an insertion opening formed in the printed circuit board; a plurality of arm portions provided at the male connector portion; lug portions provided at each tip end side of the arm portions and engaged with an opening edge of the insertion opening; and a lug-guiding portion extending out from a tip end portion of at least one lug portion to guide the lug portion to the insertion opening when the lug-guiding portion comes in contact with the opening edge and is further pressed.

Abstract: An electrical contact having a body portion and an curvaceous tail portion extending from the body portion is disclosed. The tail portion may include first and second curved portions defining first and second points of contact, respectively. The first and second points of contact may be offset from one another in a direction of insertion and may be separated by a distance measured perpendicular to the direction of insertion. The distance may be greater than the diameter of a through-hole into which the contact is intended to be inserted. At least a portion of the tail portion may be adapted to rotate upon insertion into the through-hole. The tail portion may exert a force on the sidewalls of the through-hole sufficient to retain the electrical contact in the through-hole. The tail portion may also include a sharp tip that digs into the through-hole plating, thereby impeding movement of the tail portion in a direction opposite to the direction of insertion.

Abstract: An electronic apparatus includes a circuit board having a printed board and an electronic component mounted to the printed board, a housing for receiving the circuit board therein, and a connector mounted to the printed board. Top and bottom walls of the housing have board-fixing means for fixing the circuit board to the housing. The connector has a connector-fixing portion that extends along the printed board and is placed on a first surface portion of the printed board. The connector-fixing portion is fixed to the first surface portion by connector-fixing means such as a screw. The connector-fixing portion and a second surface portion, opposite to the first surface portion, of the printed board are sandwiched between the board-fixing means so that the circuit board is fixed to the housing.

Abstract: An enclosure for housing various components of a computing device is provided herein, which contains at least three L-shaped corner members, at least three elongated wall members, a top cover member, and a bottom cover member. The corner members and the wall members are interleaved and joined to form a polygonal circumference for the enclosure. The top and bottom cover members are fixed to the top and bottom of the circumference respectively into a closed, polygonal-shaped enclosure so that a component of the computing device such as the motherboard, optical disk drive, hard disk drive, etc., could be housed therewithin.

Abstract: The mounting structure of the circuit board connector 1 which is conductively connected with a circuit board 3 installed in a case 2 and fixedly mounted to the case 2 comprises a connector housing 4 for joining the circuit board connector 1 with a mating connector, and a terminal 7 including first contactors 5 to be coupled with corresponding terminals of the mating connector and second contractors 6 to be conductively connected to the circuit board 3, wherein the connector housing 4 is located closer the case 2 than the circuit board between the circuit board 3 and the case 2 and fixedly tightened to screw retaining portions 8 of the case.

Abstract: A grounding wire is formed by bending a conductive wire. The grounding wire includes a winding portion formed on a horizontal portion so as to be smaller in diameter than a cylindrical portion of a jack, a horizontal proximal portion in parallel to a circuit board, and a connection end bent from an end of the horizontal proximal portion and connected to a ground pattern. The winding portion of the grounding wire is expanded and outwardly engaged to the cylindrical portion of the jack, and elastically and closely attached to the cylindrical portion of the jack by an elastic restoring force of the winding portion. The connection end is then inserted into a hole formed in the circuit board and soldered onto the ground pattern of the circuit board. Static electricity, with which the jack is charged, is discharged from the grounding wire to the ground pattern.

Abstract: An attachment device to a panel hole includes a female part fitted into the panel hole, and having a pass-through part on a side thereof, and a male part having a leg part inserted into the female part. The leg part has an elastic coupling claw projecting outward from the pass-through part to be coupled in the panel hole, and a turn lock part. A guide member is formed in the female part for guiding rotation of the male part. The male part is assembled with the female part to be capable of rotation from a coupled position to an uncoupled position. A turn lock receiving part is formed in the female part and has a lock receiving surface for impeding rotation of the male part toward the uncoupled position.

Abstract: In an electrical connector and circuit board securing structure, the electrical connector includes an insulating housing, a plurality of conductive terminals and an outer housing. Two sides of the outer housing are each punched to form a wing. The wing extends downwardly to form a post. The circuit board is provided with an aperture. The two posts fit into the notches so that the outer housing of the electrical connector can be positioned firmly on the circuit board with good positioning between the two, will not vibrate, and can withstand plugging and unplugging.

Abstract: An electrical connector having a seamless metal housing and a method for manufacturing the same. The electrical connector includes a plastic base and a metal housing. The housing shields a connection portion of the plastic base and is integrally formed with a top surface and a plurality of circumferential surfaces to define a chamber having an opened bottom end. At least one surface among the circumferential surfaces and the top surface is formed with an opening to expose the connection portion of the plastic base. No seam is formed between any adjacent two surfaces among the top surface and the circumferential surfaces.

Abstract: Damage of a connection between a connector and a circuit board on which the connector is mounted is to be prevented at the time of connecting the connector with a corresponding connector on a host side. In one embodiment, an HDD is provided with a serial ATA connector. The connector is mounted on a circuit board. The HDD is also provided with stiffeners for fixing the connector to the circuit board. When the connector moves toward a base at the time of connection thereof to a host-side connector, the stiffeners come into abutment against the base to stop the movement of the connector. As a result, damage of the connection between the connector and the circuit board can be prevented.

Abstract: An electric connector assembly disclosing various embodiments, each of which includes a connector body having a frustro-conically shaped outlet end portion that converges toward the outlet opening and having a complementary frustro conically shaped retainer ring circumscribing the outlet end portion wherein the retainer ring is integrally formed with a locking tang and ground tangs arranged to be snap fitted to a knock-out hole of an electric box. The latest embodiment includes a frustro-conical retainer ring having an auxiliary tang arranged to permit the connector assembly to be obliquely inserted and locked to a knock-out hole of an electric box using a minimum of applied force for effecting a snap fit connection to both lock and electrically ground the connector assembly to the electric box and a method of installing the associated connector body to an electric box.

Abstract: Various embodiments of electric connector assemblies, each of which includes a connector body having a frustro-conically shaped outlet end portion that converges toward the outlet opening with a complementary frustro-conically shaped external ring circumscribing the outlet end portion wherein the frustro-conical retainer ring is integrally formed with a locking tang and electrical grounding tangs arranged to be snap fitted to a knock-out hole of an electric box, in combination with an internal unidirectional snap-fit wire conductor retainer disposed in the inlet end portion of the connector body to facilitate the connection of a wire conductor to the connector body and whereby unintentional separation of the wire conductor therefrom is prohibited.

Abstract: An electrical connector (1) has an insulative housing (10) having a D-shaped mating portion (11), a number of first and second contacts (21, 22) received in the housing, and a metal shell (50) surrounds the mating portion of the housing. An inner printed circuit board (30) is assembled to the housing and connects the first and second contacts. The first and second contacts are electrical connecting with a complementary connector and an outer printed circuit board, respectively. The housing of the connector further has a pair of flanges (13) and a receiving space (16) defined between the flanges. The inner PCB defines a set of filter devices received in the receiving space.

Abstract: A dustproof plate fixture for an electrical connector having a housing with multiple pins and a cover connected to the housing includes a recess, a pair of cutouts in opposite sides of a dustproof plate, a pair of retainers each having a base plate and a through hole for alignment with one of two opposite combining holes in the housing and extension legs, pressing elements each having a pressing plate received in one of the cutouts to engage with a corresponding one of the base plates, a sleeve extendable into one of the combining holes and one of the connection holes, and two securing elements each extendable into one of the connection holes and into one of the sleeves to threadingly engage with the corresponding sleeve, engagement of the pressing elements, the retainers, the dustproof plate, the housing and the cover is secured.