JPH0620309Y2 - LSI socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an LSI socket, and more particularly to an LSI socket mounted on a printed circuit board for an electronic circuit that constitutes an electronic device and a computer.

[Prior Art] Conventionally, this type of LSI socket has been shown in FIGS. 3 and 4.

In the figure, 19 is an LSI, 17 is a printed circuit board, 13 is a base housing, 18 is a cover, and the contact piece 15 that contacts the pin 20 of the LSI 19 is the pin 20 of the base housing 13.
It is provided in the recess 13a formed at the corresponding position.

The contact piece 15 has a substantially U-shape with an open upper part, and contact points 14 with the pins 20 projecting inward and bending are formed at both ends of the contact piece 15, and the pin 20 is interposed between the contact points 14. It is designed to be inserted. Further, a terminal 16 for connecting to the printed circuit board 17 protruding outward is attached to the lower portion of the recess 13a, and the terminal 16 and the contact piece 15 are connected to each other.

The cover 18 has an insertion hole 21 into which the pin 20 of the LSI 19 is inserted, and the contact piece 15 is pressed against the pin 20 when the LSI 19 is mounted.

[Problems to be Solved by the Invention] In the conventional LSI socket described above, the LSI 19
Since the contact force is directly applied to the pin 20 of the LSI 19, a load is applied to the pin 20 of the LSI 19 when the LSI 19 is inserted and removed. In the case of such a structure, the diameter of the pin 20 of the LSI 19 tends to become smaller due to the recent increase in density, and when this is inserted into and removed from the LSI socket, a load is applied to the pin 20 having a small diameter and the pin 20 is deformed. There was a risk of damage.

Further, since the pin 20 has a small diameter, the spring deformation of the contact piece 15 tends to decrease, and there is a drawback that the spring characteristic has a marginless design.

[Means for Solving the Problems] The present invention has been made to solve the above problems. As a means for solving the problems, the present invention provides an LSI socket mounted and fixed on a printed circuit board for receiving a plurality of pins of an LSI. , A recess is provided in the base housing at a position corresponding to the LSI pin, and a conductive tubular contact piece for accommodating the LSI pin is provided in the recess, and the pin is attached to the end of the contact piece on the pin insertion side. A contact surface for contacting a pad on the bottom surface of the LSI substrate is provided, a printed circuit board connecting terminal protruding outward is provided in the lower portion of the recess, and the contact piece is provided between the terminal and the contact piece. A conductive spring for urging the LSI is provided, and a pressing cover for pressing the LSI against the base housing side against the urging force of the spring is provided on the base housing.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an LS of an LSI socket according to an embodiment of the present invention.
I is a sectional view showing a state before mounting, and FIG. 2 is a sectional view in which the LSI 5 is mounted.

This LSI socket is mounted and fixed on the printed circuit board 9 to receive and connect a plurality of pins 4 of the LSI 5, and a plurality of recesses 1a are provided in the base housing 1 at positions corresponding to the pins 4 of the LSI 5, and the recesses 1a are provided in the recesses 1a. LS respectively
A conductive tubular contact piece 12 for accommodating the pin 4 of I5 is provided.

The contact piece 12 is provided with a contact point 2 at the insertion side end of the pin 4 for contacting the pad 3 on the bottom surface of the substrate of the LSI 5 to which the pin 4 is attached.

Further, terminals 7 for connecting to a printed circuit board 9 protruding downward are provided at the bottoms of the recesses 1a of the base housing 1, respectively.

Then, the contact piece 12 is set to L between the terminal 7 and the contact piece 12.
A conductive spring 8 that biases the SI5 side is provided.

Further, a pressing cover 6 for pressing the contact piece 12 toward the base housing 1 side against the biasing force of the spring 8 is provided on the base housing 1. A lock lever 11 is rotatably attached to a side portion of the presser cover 6,
By engaging the tip of the lock lever 11 with the protrusion 10 provided at the position corresponding to the side surface of the base housing 1,
It can be fixed in the pressed state.

When the LSI 5 is attached to the LSI socket, L
Each pin 4 of the SI 5 is housed in the contact piece 12 of the LSI socket, and when a force is further applied in the mounting direction of the LSI 5, the spring 8 contracts, and the tip of the lock lever 11 is pressed down by a certain specified amount so that the tip of the lock lever 11 is in the base housing. Hooked on the protrusion 10 of the LSI, and the contact piece 1 of the pad 3 of the LSI 5 and the LSI socket
The contact point 2 of 2 is in the pressed state of the specified contact force.

When detaching the LSI 5 from the LSI socket, the lock lever 11 is tilted inward and the tip of the lock lever 11 is projected.
When removed from 0, the spring 8 lifts the LSI 5 and puts it in a detached state.

[Advantages of the Invention] As described above, the LSI socket of the present invention is provided with a recess at a position corresponding to the LSI pin in the base housing, and a conductive cylindrical contact piece for accommodating the LSI pin is provided in the recess. A contact surface for contacting a pad on the bottom surface of the LSI substrate on which the pin is mounted is provided at an end portion of the contact piece on the pin insertion side, and a terminal for connecting a printed circuit board protruding outward is provided at a lower portion of the recess. Further, a conductive spring for urging the contact piece toward the LSI side is provided between the terminal and the contact piece, and a pressing cover for pressing the LSI against the base housing side against the urging force of the spring is provided. Since it is provided on the base housing, even if the pin of the LSI has a small diameter, the load is not applied to the pin of the LSI by bringing the contact surface of the contact piece into contact with the pad to which the pin of the LSI is attached. This has the effect of eliminating the risk of deformation and damage.

Further, in order to stabilize the contact force, the displacement amount of the spring can be obtained regardless of the small diameter pin, so that there is an effect that there is a margin in the design.

[Brief description of drawings]

FIG. 1 is an LS of an LSI socket according to an embodiment of the present invention.
I is a sectional view showing a state before mounting, FIG. 2 is an LS of the present embodiment
FIG. 3 is a cross-sectional view of the I socket in which the LSI is mounted, FIG. 3 is a cross-sectional view of the conventional LSI socket before the LSI is mounted, and FIG. 4 is a cross-sectional view of the conventional LSI socket in which the LSI is mounted. 1: Base housing 2: Contact point, 3: Pad 4: Pin, 5: LSI 6: Presser cover, 7: Terminal 8: Spring, 9: Printed circuit board 12: Contact piece

Claims (1)

[Scope of utility model registration request] 1. An LSI socket mounted and fixed on a printed circuit board for receiving a plurality of pins of an LSI, wherein a recess is provided in a base housing at a position corresponding to the pin of the LSI, and a conductive tube for housing the pins of the LSI in the recess. -Shaped contact piece is provided, and a contact surface that comes into contact with a pad on the bottom surface of the LSI substrate on which the pin is attached is provided at an end portion of the contact piece on the pin insertion side, and a printed circuit board projecting outward at the lower portion of the recess. A terminal for connection is provided, and a conductive spring for urging the contact piece toward the LSI is provided between the terminal and the contact piece, and the LSI is further resistant to the urging force of the spring to the base housing side. An LSI socket characterized in that a pressing cover for pressing against is provided on a base housing.