Abstract: An electrical connector assembly (100) includes a housing (10), a number of signal terminals loaded in the housing (10) and a stiffener (11) disposed around the housing (10), a metal clip (13) and a lever (12) attached to two opposite sides of the stiffener (11), wherein a securing plate (15) is disposed between the metal clip (13) and the chip module (14), and the securing plate (15) is mounted above an upper surface of the chip module (14).

Abstract: An electrical connector assembly comprises a stiffener including a base with a first portion and a second portion, insulative housing, a load plate and a lever. An embossed portion is formed on the base and has substantial distance to a first end of the first portion. An insulative housing is disposed between the first portion and the second portion. A load plate is pivotally mounted on the second portion of the stiffener. A lever is pivotally assembled to the first portion of the stiffener to lock the load plate and includes a retaining portion adjacent to the embossed portion to abut against the lever when it is rotated.

Abstract: An electrical connector includes a frame (2) defining a substantially rectangular configuration and header and rear portions (22), a cover (3) moveably disposed on the frame and including a supporting surface (31) with a plurality of holes (311) defined therein, a lever (4) having a cam portion (42) disposed on the rear portion of the frame to drive the cover to move from a first position to a second position, a base (1) disposed within the frame and under the cover and an engaging member (6) retained in one side of the frame. The engaging member defines an engaging portion (63) at one end thereof which can engage with the lever when the lever arrives at a vertical position relative to the base.

Abstract: An integrated circuit socket apparatus and method of use are provided. Included is a body capable of receiving an integrated circuit including a plurality integrated circuit contacts. Further provided is a bottom adapter assembly removably coupled to the body. The bottom adapter assembly includes a top portion, a bottom portion, and a plurality of pins removably situated between the top portion and the bottom portion of the bottom adapter assembly, for providing electrical communication between the integrated circuit contacts and a plurality of circuit board contacts. Still yet, a coupler is provided which is capable of coupling the top portion and the bottom portion of the bottom adapter assembly when the bottom adapter assembly is removed from the body.

Abstract: An electrical connector for electrically connecting an IC package to a printed circuit board is provided, which includes an insulative housing including a main body for supporting the IC package and four straight peripheral sidewalls surrounding the main body; a stiffener having a base separably disposed around the insulative housing. The base defines an opening for receiving the insulative housing. And the stiffener further includes four elastic latches extending upwardly from inner sides of the opening for engaging with the insulative housing, and the insulative housing corresponding defines four slots on outside surfaces of the sidewalls for being resisting against the elastic latches.

Abstract: An electrical connector (100), mounted on a printed circuit board (PCB) (1), includes an insulative housing (2), a load plate (3) shielding over the insulative housing, an elastic piece (51) attached to the load plate and a screwing element (50) cooperating with the elastic piece to lock with the load plate. The insulative housing has a plurality of electrical contacts (22) received therein. The elastic piece forms a base portion (510) and a flexible element (513, 513?) extending from the base portion. The flexible element has an indicating portion (5132, 5132?) received and moveable in the cutout in response to a downward movement of the load plate.

Abstract: An electrical connector (100), mounted on a printed circuit board (PCB) (1), includes an insulative housing (2), a load plate (3) shielding over the insulative housing, an elastic piece (51) and a screwing element (50). The insulative housing has a plurality of electrical contacts (22) received therein. The load plate forms a tongue portion (30) at an edge thereof. The tongue portion defines at least one hole (31, 32) therein. The elastic piece forms a base portion (510) with a pair of inner hook portions (512) and a pair of outer hook portions (513) thereon. The outer hook portions and the inner hook portions go through the at least one hole and respectively and correspondingly engage with the tongue portion of the load plate and the screwing element.

Abstract: A CPU socket (1) mounted on a PCB (2) includes a metallic cover (10) and an insulative housing (20). The insulative housing has an installation section (30). The metallic cover has a main portion (11), a locking portion (13) and a resilient portion (12). The resilient portion is rotatably assembly to the installation section. The metallic cover is able to rotate around the resilient portion. The locking portion and the resilient portion extend from opposite sides of the main portion, respectively. The locking portion is able to be locked and released to a locking member (32) which is fixed to the PCB. The locking portion is driven by a screwdriver (5) to release or lock to the locking member (32). The CPU socket provides a solution for locking or releasing from the PCB without a lever, which is used to lock or release the metallic cover.

Abstract: To provide an IC socket which reduces the operating force of a pressing member, enlarges the dimensions of a pressing surface of the pressing member, and prevents positional offset of the IC device while applying the pressing force. Means for Solution: An IC socket 10 is provided with a housing 14 having a support 12, a plurality of contacts 16, a pressing member 18 for pressing an IC device supported at the support toward a group of contacts, and a biasing mechanism 22 for generating a pressing force for pressing the IC device at the pressing member. The pressing member has a pivot 42 guided linearly on the housing and a pressing surface swingable about the pivot on the housing, while the biasing mechanism 22 applies a biasing force to the pivot of the pressing member so as to cause the pressing force at the pressing surface.

Abstract: A fastening structure comprises a stiffener including a first end and a second end opposite to the first end. A load plate is pivotally supported on a first end of the stiffener and has a pair of lateral walls. A lever is pivotally mounted on the lateral walls of the load plate and a locking portion to lock the load plate to the stiffener. An LGA socket using the fastening structure comprises an insulative housing having a plurality of contacts. A stiffener includes a first end and a second end and is positioned on a bottom surface of the insulative housing. A load plate is pivotally attached on the first end of the stiffener and has at least a lateral sidewall. A lever is pivotally mounted on the lateral sidewall, the lever and the load plate is being pivotal between an open position and a closed position together, the lever has a transverse locking portion to lock the load plate to the stiffener near the second end of the stiffener.

Abstract: An electrical connector is for electrically connecting an electronic package with a circuit substrate. The connector includes a housing having a plurality of conductive terminals, a fastening device including a load plate for pressing the electronic package and a retaining member for securing the load plate. The load plate defines a first edge, a second edge opposite to the first edge, a third edge pivoted to the fastening device and a fourth edge adjacent to the first edge and the second edge. The four edges jointly define an opening in the middle thereof with the first and second edges each having a pressing portion. Corners of the opening near the third edge extend upwardly. During the rotation of the load plate, the pressing portions will abut against the electronic package prior to the corners near the third edge, and thereby prevent the corners from abutting against the electronic package.

Abstract: An electrical connector assembly includes a frame (7) defining a central opening (70) and with a front portion (75) and a rear portion (76), an insulative housing (10 securely disposed within the central opening, a cover (6) having hook portions (61) rotatablely assembled in the rear portion of the frame, a lever (3) with a pressing portion (32) pivotally retained to the front portion of the frame to lock the cover against the insulative housing, a heat sink (4) disposed onto the cover and at least one clip (5) for securing the heat sink to the cover. The frame defines locking portions (710, 720) at the front portion and the rear portion thereof, the at least one clip defines a pair of legs (50) and a connecting portion (52) connecting the legs. One leg locks with the locking portion of the front portion and the other leg locks with the locking portion of the rear portion of the frame.

Abstract: A socket for an electric component may have a socket main body, a plurality of contact pins disposed within the socket main body, a socket cover, a slide plate disposed inside the socket main body to be movable up and down, and drive levers which are provided between the socket main body and the bottom face of the socket cover. The drive levers press both end portions of two opposing sides of the slide plate by a down-movement-operation of the socket cover to lower the slide plate. The socket may also include sub-levers provided between the socket main body and the bottom face of the socket cover for pressing one or plural positions of other opposing two sides of the slide plate, which oppose to each other in a direction perpendicular to the two opposing sides pressed by the drive levers to lower the slide plate.

Abstract: An electrical connector (100) for electrically connecting a central processing unit to a printed circuit board, including a rectangular insulative housing (40) having a plurality of receiving channels; a number of contacts received in the receiving channels; a cover (10) rotatably covering on the insulative housing so as to press the central processing unit; a lever (50) comprising an operating portion (504) and two pressing portions (503) to lock the cover; and a stiffening frame positioned under the insulative housing. Wherein said stiffening frame is formed with a first and second stiffening plates (30,31) and two stiffening beams (20), each stiffening beam has two engaging portions (212) extending longitudinally, each stiffening plate comprises a first and a second fixing plates (301,311) on two sides thereof to fix the engaging portions transversely to form a frame structure.

Abstract: A socket connector (1) for electrically connecting a Central Processing Unit (CPU) with a Printed Circuit Board (PCB), includes a base (10), a cover (20) and a shaft (30) attached to the cover and pivotally driving the cover to move on the base. The base has a plurality of conductive contacts received therein and defines a plurality of apertures (104) in the middle thereof. The cover forms a plurality of pillars (208) extending through the apertures and forward a lower surface of the base. The pillars are moveable in the apertures along with the cover.

Abstract: An electrical connector (1) for electrically connecting an electronic package with a circuit substrate. The connector includes a housing (11), a fastening device assembled with the housing, and a stiffener (12) surrounding the housing. The stiffener includes a back end (123), and a pair of spaced first walls (125) adjoining the back end. Each first wall has a latch (128) extending upwardly therefrom, and then bends inwardly. The back end has a pair of spaced spring fingers (129) extending substantially horizontally, and then bends slightly upwardly. The latches are fastened to the housing for locating the housing in a vertical direction. The spring fingers abut against the housing for locating the housing in a horizontal direction. The stiffener reinforces the housing, and protects the housing from deformation or warpage.

Abstract: A socket adapted for electrically connecting an IC package and a PCB, comprising: a body mounted on the PCB for electrically connecting the IC package, two bolts mounted on the PCB and beside the body and a clip for retaining the IC package in the body. The bolt has a header portion on the top with biggest size, a middle portion and a screw portion engaging with the PCB. The clip has two attaching portions, each defining a hatch at a free end thereof, the clip links with the bolt by inserting the attaching portion toward the bolt to make the middle portion be received in the hatch and the header portion be upon the hatch to prevent the attaching portion from upward movement.

Abstract: An IC socket comprises an insulative housing having a plurality of periphery walls and a cover pivotally assembled to one end of the insulative housing and adapted to be locked to the insulative housing at the other end. The cover includes a plurality of peripheral edges. The cover also has a plurality of spring arms upwardly extending therefrom and disposed at the edges.

Abstract: An electrical connector for electrically connecting an IC package to a printed circuit board is provided, which includes an insulative housing including a main body for supporting the IC package and four straight peripheral sidewalls surrounding the main body; a stiffener having a base separably disposed around the insulative housing. The base defines an opening for receiving the insulative housing. And the stiffener further includes four elastic latches extending upwardly from inner sides of the opening for engaging with the insulative housing, and the insulative housing corresponding defines four slots on outside surfaces of the sidewalls for being resisting against the elastic latches.

Abstract: An insert comprises an insert body having an IC housing part, a drive plate being allowed to move up and down attached to the insert body and a latch being allowed to swing attached to the insert body and having a pressing portion formed at its lower end portion. The latch swings along with the upward/downward move of the drive plate, and the pressing portion of the latch goes out to the IC housing part when the drive plate moves upward and presses an IC device housed in the IC housing part against a sidewall portion of the IC housing part.

Abstract: An electrical connector assembly comprises a carrier and an electrical connector with an insulative housing. The carrier has a base and a plurality of sidewalls extending downward from peripheral of the base and jointly defining a cavity. The carrier includes a plurality of claws and release sections associate with the claws. An electrical connector is received in the cavity and has alignment pins assembled to the electrical connector and engaged with the claws. Each alignment pin disengaged from the claw by the release section.

Abstract: A socket for an electrical part, such as IC socket, to be mounted on a printed circuit board is provided with a socket body, and a plurality of contact pins are mounted to the socket body so as to electrically connect the electrical part and the printed circuit board. The contact pin includes a base portion, an elastic piece extending upward from the base portion, a lead portion extending downward from the base portion, and a contact portion formed to a tip end of the elastic piece. The lead portion is inserted into an insertion hole formed to the printed circuit board. The contact pins are inserted into the socket body of the IC socket from the lower side thereof so that the base portion of each contact pin is fitted to a base portion fitting hole portion, and the base portion is pressed by a locating board disposed to the lower side of the socket body.

Abstract: A land grid array (LGA) connector includes an insulative housing, a number of contacts received in the insultive housing, a stiffener disposed around the insulative housing, a metallic clip rotatably mounted to the stiffener, and a lever rotatably mounted to the stiffener to lock the metallic clip to the stiffener. The insulative housing defines a substantially rectangular cavity in a middle thereof adapted for receiving an electronic package therein. The metallic clip is disposed against the housing to press the electronic package upon the contacts. The metallic clip is configured by a single strip with a predetermined arrangement and then formed through bending.

Abstract: A socket (100) adapted for electrically connecting a semiconductor package (200) and a PCB (300), comprises an insulating body (10) and a plurality of terminals (20) each having an elastic arm. The insulating body has a mating face (101), a mounting face (102) opposite to the mating face and a plurality of passageways (103) passing through the mating face and the mounting face. The insulating body is formed with a first and a second areas (1011, 1012) separated by a beeline (L1), the passageways are distributed on both of the areas. The terminals are received in the passageways, and extending directions of the terminals in a same area are uniform but opposite with that of the terminals in the other area. And the extending directions of all the terminals are parallel to the beeline.

Abstract: A socket assembly for electrically connecting an IC package to a printed circuit board, comprises an insulative housing, at least two retainers mounted on the printed circuit board and a loading plate. The insulative housing defines a receiving space for the IC package. The retainers are mounted on the printed circuit board and located on two sides of the insulative housing, and the retainer has a latching portion with a latching slot. The loading plate is mounted above the insulative housing and has two opposite lateral portions retained in the latching slot of the retainer, respectively, to retain the loading plate.

Abstract: An electrical connector assembly, for electrically interconnecting an IC package with a printed circuit board, includes a printed circuit board, an electrical connector mounted on the printed circuit board, an IC package mounted in the electrical connector, a heat sink seated on the electrical connector, a backboard located under the printed circuit board and a plurality of first and second elements. The electrical includes an insulative base and a load plate mounted on the insulative base, and the load plate defines a plurality of first holes. The heat sink defines a plurality of second holes, while the printed circuit board defines a plurality of third holes, and the backboard defines a plurality of fourth holes. The first elements are inserted through the first, the third and the fourth holes to fasten the IC package, the electrical connector, the printed circuit board and the backboard together.

Abstract: An electrical connector includes a socket body with a number of contacts, a retention frame spaced from the socket body, a load plate attached to the retention frame, and a fastener. The retention frame located at a first side of the socket body and the load plate attached to at a second side of the socket body. The load plate rotates toward or away from the socket body from an open position to a closed position. The fastener is used to fasten the load plate at the closed position.

Abstract: An electrical connector (100) mounted on a printed circuit board (1) includes a housing unit (2), an outer shield (4) enclosing the housing unit, and a connecting assembly (5) connecting the outer shield to the printed circuit board. The connecting assembly has a supporting member (51), a conductive member (50) extending through the supporting member and a washer (52). The supporting member has a head (501) and a body (502) surrounded by the supporting member (51). The washer locks with the body and resists against an upper surface of the printed circuit board for grounding.

Abstract: A burn-in includes a base, a number of contacts received in the base, and a cover pivotally mounted to the base and rotatably moving between an open position and a closed position. The base defines a receiving space and a plurality of recesses adjacent to and communicating with the receiving space. Two hard stoppers are mounted to the recesses of the base and support upwardly the cover.

Abstract: An IC socket for receiving an IC package having a plurality of electrical contacts on a bottom face thereof is disclosed. The IC socket has an insulating housing that receives the IC package and a plurality of elastic contacts, one end each being secured to the insulating housing, and a remaining end of each contacting at least one of the electrical contacts on the bottom face of the IC package. The IC socket also has a spring member carried by the insulating housing that determines an accepting position for the IC package being accepted into the insulating housing, and that restrains an amount of horizontal movement of the IC package caused by bending of the elastic contacts as the IC package is pressed down.

Abstract: A cover member 34 is moved upward when a semiconductor device 26 disposed in a positioning member 44 is held by an absorption pad 24 to pinch an electrode portion 26a of the semiconductor device 26 with movable contact portions 46M and 46F of a contact terminal 46ai.

Abstract: An IC socket comprises a base defining a plurality of passageways, a cover attached to the base and two actuating mechanisms disposed between the base and the cover. The cover has a plurality of apertures corresponding to the passageways. The two actuating mechanisms are disposed between the base and the cover to driving the cover moving along the base simultaneously.

Abstract: Provided is a test socket capable of being used more flexibly for solid-state image pickup devices of different shapes and of performing locating of the solid-state image pickup devices more precisely. The test socket houses a device under test (DUT) which is a solid-state image pickup device while a test is being performed. The test socket comprises: first locating means for locating the DUT in an X direction parallel to a ceiling plane of the DUT in a housed state; urging means for urging the first locating means in a Z direction perpendicular to the ceiling plane of the DUT in the housed state; and position setting means for setting an upper limit of movement in the Z direction of the first locating means caused by the urging means to set a position in the Z direction of the first locating means relative to the DUT.

Abstract: An electrical connector mounted to a printed circuit board includes an insulation housing mounted to a printed circuit board, a plurality of contacts received in the insulation housing, a load plate covering the insulation housing. And an indicator disposed on the load plate. The indicator has a indicating portion, the showing abouting against the printed circuit board and capable of changing positions relative to the load plate, so that the operator may observe an assembly process of the load plate. The electrical connector has a simple configuration and reliable connection.

Abstract: Apparatus including a body as an intermediary between a device and a printed circuit board, the body including a contact area defined by a plurality of openings each to accommodate a contact therethrough and an alignment feature adjacent the contact area and protruding from a plane defined by the contact area, wherein a surface of the alignment feature includes a friction-reducing material. A method including contacting an alignment feature of a socket with a friction-reducing material. Apparatus and system including a body as an intermediary between a device and a printed circuit board; a plurality of contacts each disposed through a contact area of the body and oriented to deflect a device in a first direction; and a load plate coupled to the body and configured to apply an actuation force on a device in a different second direction. A method including inserting a device into a socket.

Abstract: Disclosed herein is a BGA-type test and burn-in socket for ICs. The socket includes contacts, a socket body, a cover, a slide, and an IC holder. The socket body has contact holes to receive the contacts, and positioning pins to secure the socket body to a PCB. A stopper, receiving a contact body, and a lead guide, guiding a contact lead, are provided on the lower portion of the socket body, and the slide and the cover are provided on the upper portion of the socket body. The cover includes holder rotating pins, and open cams and closure cams to move the slide. The slide includes open cam contact parts contacting the open cams when the cover is pressed down, and closure cam contact parts contacting the closure cams when the cover moves upwards. The IC holder moves downwards by the holder rotating pins, thus pressing an IC.

Abstract: A contact, adapted for electrically connecting IC package and a printed circuit board, comprises a base, an upper spring arm and a lower spring arm. The upper spring arm is formed with an upper waist portion extending from a top edge of the base and a top end for electrically contacting with the IC package; and the lower spring arm is formed with a lower waist portion extending from a bottom edge of the base and a bottom end for electrically contacting with the printed circuit board. The bottom end has a width larger than that of the top end, and the lower waist portion has a width larger than that of the upper waist and defines a slot in a middle thereof.

Abstract: An electrical connector includes an insulative housing, a number of electrical contacts and a stiffener device surrounding housing. A load plate is mounted to one end of the stiffener device and a lever is rotatably mounted to the other end of the stiffener device. The stiffener device includes an insulative frame for cost saving and a number of metal auxiliary members for increasing intensity.

Abstract: An LGA connector (100) comprises an insulative housing (20) defining a plurality of side surfaces (21), a stiffener (30) surrounding the insulative housing (20) and comprising a bottom plate (31) and a plurality of sidewalls (33) extending upwardly from the bottom plate (31), the bottom plate (31) defining a window (313) for accommodating the insulative housing (20), a clip (40) pivotally engaged to one end of the stiffener (30) and comprising a main plate (41) and a pair of side plates (411) extending from the two opposite sides of the main plate (41), and a lever (50) engaged to the other end of the stiffener (30) for fastening the clip (40). Each side surface (21) and corresponding sidewall (33) define a gap therebetween for accommodating the side plate (411) and the bottom plate (31) defines a pair of slots (314) connected with the window (313).

Abstract: An electrical connector (100) adapted for electrically connecting a chip module to a printed circuit board, includes an insulative housing (30) having a plurality of terminals received therein and a fastening device (90). The fastening device (90) comprises a stiffener (50) surrounding the insulative housing (30), a load plate (60) pivotally assembled to an end of the stiffener (50), and a knob (70) assembled on an opposed end of the stiffener (50) for locking the load plate (60). The knob (70) has a stem (702) rotationally provided with a guiding slot (704) helically defined along the stem (702) such that the tongue (610) of the load plate (60) engaged with the guiding slot (704) can be moved up and down when the knob (70) is rotated clockwise and counterclockwise.

Abstract: The electrical connector may include an insulative housing and a support member. The housing may include a first surface, a second surface, a first side, and at least one aperture disposed from the first surface to the second surface. The support member may be mounted to the first side to provide rigidity to the insulative housing. The support member may include a mounting latch to attach the support member to the housing. The support member may also include an anchor tab which may be soldered to a component, such as, a printed circuit board.

Abstract: An LGA socket includes an insulative housing with a number of terminals. A stiffener and a load plate are coupled to each other. The insulative housing is disposed between the load plate and the stiffener. A lever includes an actuating portion and a retaining portion rotatably mounted to the stiffener. The retaining portion has a neck portion and a stop portion at a free end thereof to prevent the lever taking side moving relative to the stiffener.

Abstract: An IC socket for receiving an IC package includes a socket body with a plurality of contacts disposed therein, a lid mounted on the socket body and movable relative to the socket body in an up-down direction, and a pressing mechanism driven by the lid. The pressing mechanism has a pusher able to apply a substantial balanced force to the IC package, and thus any distortion of the IC package will be prevented effectively.

Abstract: An electrical connector assembly for mounting on a circuit board includes a pressing frame, a base, and a pressing pole. The base and the pressing frame may be mounted on two opposite surfaces the circuit board so that a pivoting portion and protruding pieces of the base respectively pass through the circuit board. The pressing frame is mounted on the pivoting portion. The pressing pole mounts to the protruding pieces and can be translated so as to urge the pressing frame toward a closed position. A receptacle connector may be mounted between the pivoting portion and the protruding pieces and secured by the pressing frame. A radiator may be mounted over on the receptacle connector. A plurality of fastener may extend between the radiator and the base so as to secure the radiator in position.

Abstract: An electrical connector assembly (100) comprises an electrical connector for connecting an electronic package with a circuit substrate (4) and including an stiffener (1) defining a through hole (121) in a periphery, a fastening device (3) for fixing the electrical connector to the circuit substrate (4) via the corresponding through hole (121), a hollow restricting device (2) defining a plurality of protruding portions (24) interferencing with the fastening device (3) make the fastening device (3) securely located on the stiffener (1). At the same time, the restricting device (2) located between the stiffener (1) and the circuit substrate (4) function as a stand-off, make it more easy to assemble the stiffener (1) to the circuit substrate (4).

Abstract: An electrical connector mounted to a printed circuit board for receiving an IC package is provided that includes an insulative housing (1) mounted to the printed circuit board, a plurality of contacts (2) received in the insulative housing, a positioning member (3) mounted to the circuit board and located around the insulative housing (1), and a load plate (4) covering above the insulative housing (1). A first load lever (5) is pivotally connected to one side of the positioning member (3) and locks one end of the load plate (4), and a second load lever (6) is pivotally connected at an opposite end of the positioning member (3) and locking an opposite end of the load plate (4).

Abstract: A pressing surface portion of a presser member for selectively holding a semiconductor device is supported to be movable upward and downward in accordance with the up/down motion of a cover member to be close to or away from a alignment plate, as well as to be rotatable between a position directly above the alignment plate and a predetermined waiting position.

Abstract: An electrical connector mounted on a printed circuit board 8 for receiving an IC package includes a socket (2) with a plurality of contacts (3) received therein, a load plate (4) supported by a supporting member (5) and capable of rotating toward or away from the socket (2), a pair of retaining seats (6) separated from each other and spaced from the socket (2), and a load lever (7) secured by the retaining seats (6) and engaging the load plate (4) to fasten the load plate (4) in a closed position.

Abstract: An electrical connector includes a socket body with a number of contacts, a retention frame spaced from the socket body, a load plate attached to the retention frame, and a fastener. The retention frame located at a first side of the socket body and the load plate attached to at a second side of the socket body. The load plate rotates toward or away from the socket body from an open position to a closed position. The fastener is used to fasten the load plate at the closed position.

Abstract: A socket connector assembly for holding a semiconductor package comprises a socket connector and an actuator assembled to the socket connector. The actuator comprises a housing defining an opening on a bottom face thereof; a cam portion retained to the housing and being able to rotate; and a floating module. The floating module is movably mounted to the housing and defines a topmost position and a lowermost position relative to the housing. The floating moves between the topmost position and the lowermost position during a rotation of the cam portion. The floating module has an engaging portion to contact with the semiconductor package when the floating module is at the lowermost position.