Abstract: A socket for electrical parts which makes a locater plate fulfill the function satisfactory and enhance the operational feeling of the locater plate. In a preferred embodiment of the present invention, the lock members are fixed on the vertically movable locater plate. The top of the lock member is the first engaging potion formed so as to have a hook shape, and the bent double portion thereof is a second engaging portion. The first engaging portion regulates the downward movement of the locater plate at the bottom position. The second engaging portion which regulates the upward movement and releases the regulation of the upward movement by deforming elastically when a force larger than a predetermined value is applied.

Abstract: A socket for electrical parts which makes a locater plate fulfill the function satisfactory and enhance the operational feeling of the locater plate. In a preferred embodiment of the present invention, the lock members are fixed on the vertically movable locater plate. The top of the lock member is the first engaging potion formed so as to have a hook shape, and the bent double portion thereof is a second engaging portion. The first engaging portion regulates the downward movement of the locater plate at the bottom position. The second engaging portion which regulates the upward movement and releases the regulation of the upward movement by deforming elastically when a force larger than a predetermined value is applied.

Abstract: An unlubricated bearing structure for supporting a rocking arm of an IC socket includes an arm support as an operating member that supports the rocking arm, a support shaft, made of metal, fitted and fixed to the arm support, and a cylindrical bush, made of metal, mounted to the support shaft so that the cylindrical bush is fitted into a bearing hole formed to the rocking arm. The support shaft, the cylindrical bush and the rocking arm are arranged such that a first clearance is formed between an outer peripheral surface of the support shaft and an inner peripheral surface of the cylindrical bush, and a second clearance is formed between an outer peripheral surface of the cylindrical bush and an inner peripheral surface of the bearing hole.

Abstract: A spring reaction force converting apparatus has first and second members arranged to be in parallel with and opposed to each other and to be capable of being moved toward and apart from each other, a spring element arranged to be extended between the first and second members in parallel thereto, a link mechanism holding the spring element between the first and second members such that the spring element is capable of being expanded and contracted, the link mechanism being connected to the first and second members; a stopper member maintaining the spring element held by the link mechanism in a condition in which the spring element is compressed by a predetermined amount in an initial condition, and an arrangement thereof in which a reaction force of the spring element is converted to a different type of force transmitted to the first and second members through the link mechanism.

Abstract: A spring reaction force converting apparatus has first and second members arranged to be in parallel with and opposed to each other and to be capable of being moved toward and apart from each other, a spring element arranged to be extended between the first and second members in parallel thereto, a link mechanism holding the spring element between the first and second members such that the spring element is capable of being expanded and contracted, the link mechanism being connected to the first and second members; a stopper member maintaining the spring element held by the link mechanism in a condition in which the spring element is compressed by a predetermined amount in an initial condition, and an arrangement thereof in which a reaction force of the spring element is converted to a different type of force transmitted to the first and second members through the link mechanism.

Abstract: A contact pin comprises a plunger contacting an electric part, a bottom contact portion electrically connected to a printed circuit board, and a spring urging the plunger and the bottom contact portion so as to separate from each other, in which at least one of the plunger and the bottom contact portion is formed by press-working a plate member. The bottom contact portion is provided with a connection portion to which the plunger is connected.

Abstract: A socket for an electrical part having a socket body has an electrical part accommodation portion and a contact pin is provided for the socket body so as to be contacted to or separated from a terminal of the electrical part. The contact pin has a contact portion, which projects upward over a through hole formed to the electrical part accommodation portion by a predetermined amount irrespective of an accommodation condition of the electrical part.

Abstract: A socket for an electrical part comprises: a socket body having an electrical part accommodation portion; a contact pin to be contacted to or separated from a terminal of the electrical part; an open/close member provided for the socket body for pressing the electrical part accommodated on the accommodation portion; and an operation member disposed to be vertically movable so as to open or close the open/close member. The open/close member includes a pressing member such as heat sink for pressing the electrical part and a link mechanism supporting the pressing member to be openable, and the link mechanism comprises a first link disposed to be rotatable to the pressing member and the socket body and a second link disposed to be rotatable to the first link and the operation member.

Abstract: A contact pin comprises a plunger contacting an electric part, a bottom contact portion electrically connected to a printed circuit board, and a spring urging the plunger and the bottom contact portion so as to separate from each other, in which at least one of the plunger and the bottom contact portion is formed by press-working a plate member. The bottom contact portion is provided with a connection portion to which the plunger is connected.

Abstract: A socket for an electrical part having a socket body has an electrical part accommodation portion and a contact pin is provided for the socket body so as to be contacted to or separated from a terminal of the electrical part. The contact pin has a contact portion, which projects upward over a through hole formed to the electrical part accommodation portion by a predetermined amount irrespective of an accommodation condition of the electrical part.

Abstract: A socket for an electrical part comprises: a socket body having an electrical part accommodation portion; a contact pin to be contacted to or separated from a terminal of the electrical part; an open/close member provided for the socket body for pressing the electrical part accommodated on the accommodation portion; and an operation member disposed to be vertically movable so as to open or close the open/close member. The open/close member includes a pressing member such as heat sink for pressing the electrical part and a link mechanism supporting the pressing member to be openable, and the link mechanism comprises a first link disposed to be rotatable to the pressing member and the socket body and a second link disposed to be rotatable to the first link and the operation member.

Abstract: A socket for electrical parts is provided with a socket body for accommodating the electrical part. A plurality of contact pins is arranged to the socket body so that a central side contact pin is arranged to the socket body to contact a center side terminal of the electrical part and a peripheral side contact pin is arranged to the socket body to contact a peripheral side terminal of the electrical part. A press unit is arranged to press an upper surface of the peripheral portion towards a bottom surface side thereof so that, if the electrical part is warped, it becomes possible to securely hold the electrical part by the press unit.

Abstract: A socket for electrical parts is provided with a socket body for accommodating the electrical part. A plurality of contact pins is arranged to the socket body so that a central side contact pin is arranged to the socket body to contact a center side terminal of the electrical part and a peripheral side contact pin is arranged to the socket body to contact a peripheral side terminal of the electrical part. A press unit is arranged to press an upper surface of the peripheral portion towards a bottom surface side thereof so that, if the electrical part is warped, it becomes possible to securely hold the electrical part by the press unit.