JP2002231398A - Ic socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC socket which is applicable to a change in type of an IC package to be inspected, if different in type, simply by giving 180 deg. rotation to a movable plate and capable of preventing damages to the IC package or others, when it is mounted, by suppressing the excess rotation or reverse of the movable plate in an always stable condition. SOLUTION: The IC socket 1 comprises a socket board 10 for supporting a contact 40, a press cover 20 having an opening window 22 at its central portion, mounted on the socket board 1, in such a manner as to be freely pressed, the movable plate 30 turnably mounted on the opening window 22 of the press cover 20 via a shaft 21 for putting the IC package in press contact with the contact 40, and a rotation-preventing mechanism containing a stopper 50 movable forward/backward to/from the movable plate 30 for suppressing the rotation of the movable plate 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC socket, and more particularly, to an IC socket by mounting an IC package on the IC socket and closing a holding cover of the IC socket.
The package package is held by pressing the lead of the C package against the contact of the IC socket to hold the IC package.
Regarding C socket.

[0002]

2. Description of the Related Art A conventional IC socket 100 of this type includes:
For example, as shown in FIG.
01, a holding cover 102 rotatably attached to the socket substrate 101 via a shaft 105, and a turning cover provided on an opening window 108 of the holding cover 102 via a shaft 106 to press the IC package 111. A movable plate 103, and a contact 104 that is attached through the socket substrate 101,
As shown in the figure, the free end of the holding cover 102 engages with a claw 110 provided on the socket substrate 101 to press the lead 112 of the IC package 111 into contact with the contact 104 and press the IC package 111 into the IC socket. Hold within.

As shown in the figure, the movable plate 103 has an opening 107 through which a shaft 106 passes.
03 is deviated in the height direction. This is because when the type of IC package to be inspected (height in this conventional example) is different, the movable plate is simply rotated 180 degrees and used without preparing another movable plate. It is something that can be handled.

Incidentally, the movable plate 103 is provided with an opening window 1.
The size of the IC package 111 is limited so that the IC package 111 can be appropriately rotated and moved up and down in order to bring the IC package 111 into pressure contact with the contact 104 while keeping the IC package 111 horizontal. That is, the movable plate 102 is configured so as not to be excessively rotated or carelessly inverted to damage the IC package or the like. Therefore, IC
When the type of the package 111 is different, the movable plate 103
The shaft 106 had to be removed in order to use it rotated 180 degrees, which was troublesome.

To solve this problem, an IC socket as shown in FIG. 6 has been known (for example, see Japanese Patent Publication No. 7-46625). In this IC socket, a spring piece 209 projects from one side (in this conventional example, the right side in the drawing) of an opening window 208 formed in a pressing cover 202 having a size such that the movable plate 203 can make one rotation around the shaft 206. Has been established. With this configuration, when the type (width in this conventional example) of the IC package is different, the movable plate 203 can be used by rotating it 180 degrees clockwise against the spring piece 209. Further, with this configuration, when the IC package is mounted on the IC socket, the spring piece 209 prevents the movable plate 203 from excessively rotating or inverting.

[0006]

In the prior art as shown in FIG. 6, the movable plate 203 has a substantially point-symmetric structure with respect to the shaft 206 which is the center of rotation. The rotation locus (circle) drawn by (A, B, C, D) is substantially the same. Therefore, the opening window 20
If the tip of the spring piece 209 protruding from one side of the movable plate 203 toward the side wall of the movable plate 203 is arranged in this locus (circle), it is possible to prevent the movable plate 203 from excessively rotating and reversing. It is.

However, even if the technique disclosed in the conventional example shown in FIG. 6 is applied to the conventional example shown in FIG. Excessive rotation or inversion cannot be prevented when the package is mounted. The reason is that in the conventional example shown in FIG. 5, the center of rotation is deviated in the vertical direction in order to cope with the difference in the thickness (height) of the IC package, whereas in the conventional example shown in FIG. In the prior art, the center of rotation is not deviated at all in order to cope with the difference in width (of the lead terminals) of the IC package.

[0008] As shown in a simplified manner in FIG. 7, when the rotation center of the movable plate 103 is deviated in the height direction, the rotation of the corners (A, B, C, D) of the movable plate 103 is reduced. It is understood from the fact that the trajectory is different from the case where the rotation center is not deviated.

That is, the point O where the rotation center is not deviated
Is a single circle A as described above, whereas two rotation trajectories about the point O ′ where the rotation center is deviated are a circle C and a circle D. Therefore,
When the conventional example shown in FIG. 6 is simply applied to the conventional example shown in FIG. It can be understood that the movable plate can be rotated by 180 degrees when necessary, and that excessive rotation and reversal of the movable plate can be prevented in normal times.

As a matter of theory, as a practical matter, the arrangement of the tip of the spring piece without touching the side of the movable plate and within the range of the circle D is shown in an enlarged view in FIG. Although the range is narrow and subtle even in the above, considering the size of the actual IC socket and the size of the IC package that are smaller than the drawings, very high accuracy is required, and the design is difficult.

Further, since extremely high precision is required, even if this structure can be manufactured, even if the spring piece is slightly deformed, the tip of the spring piece moves out of the circle D or touches the side surface. As a result, the above operation and effect cannot always be stably maintained, and when the IC package is mounted, an undesirable situation such as damage to the IC package or deviation of the contact position with the contact is caused.

An object of the present invention is to make it easy to manufacture without requiring so much precision in manufacturing,
If the type of IC package to be inspected is different,
It is possible to respond to the change of the type only by rotating the movable plate by 180 degrees, and when the IC package is mounted, the excessive rotation and reversal of the movable plate are suppressed in a stable state at all times,
An object of the present invention is to provide an IC socket capable of preventing damage to an IC package or the like.

[0013]

SUMMARY OF THE INVENTION An IC socket according to the present invention has a substrate for supporting a contact, an opening window in the center thereof, a pressing cover attached to the substrate so as to be able to press, and a contact cover for the contact. A movable plate rotatably attached to the opening window of the holding cover via a shaft to bring the IC package into pressure contact, and advance / retreat with respect to the movable plate to suppress rotation of the movable plate And a rotation prevention mechanism including a possible stopper.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that, in this specification, in order to make the description easy to understand, similarly to the conventional example, the description will be made using an IC socket in which the holding cover is hinged to one end of the socket substrate.

FIGS. 1A and 1B are schematic views of an IC socket according to the present invention, wherein FIG. 1A is a top view, and FIG. 1B is a partially sectional side view. The IC socket 1 is roughly composed of a socket substrate 10,
It comprises a holding cover 20, a movable plate 30, a contact 40, and a stopper 50 constituting a rotation preventing mechanism.

The socket substrate 10 is hinged at one end thereof to a press cover 20 via a shaft 15, and is urged clockwise in the drawing by a spring which locks the press cover at the other end facing the same. The claw 11 is provided.

The pressing cover 20 has one end rotatably attached to the shaft 15 of the socket substrate 10 and the other end opposite thereto is engaged with a claw 11 provided on the socket substrate 10. Joint 24, movable plate 30
Window 22 for accommodating the movable plate 30 with the opening window 2
2, a shaft 21 rotatably supported therein and a recess 23 for accommodating a stopper.

The movable plate 30 is rotatably supported in the opening window 22 of the holding cover 20 as described above.
Hole 32 through which the shaft 21 is inserted, and the stopper 50
Is provided with a groove portion 31 having an appropriate play in a direction perpendicular to the stopper 50.

The opening 32 has a diameter larger than that of the shaft 21 so that the movable plate 30 can move a predetermined amount in the vertical direction. As described above, the groove 31 also has a stopper H such that the vertical length H of the groove is such that the movable plate 30 is movable vertically by a predetermined amount and is rotatable around the shaft 21 by a predetermined amount. The height h is greater than 50. The reason why the opening 32 and the groove 31 are configured in this way is that the movable plate 30 can press the IC package against the contact 40 while keeping the IC package horizontal.

The contact 40 is for communicating the IC package with the inspection circuit, and is attached to the substrate 10 so as to penetrate the substrate 10.

Normally, the stopper 50 has its distal end 52 inserted into the groove 31 of the movable plate 30 (ie, at the time of locking) to prevent the movable plate 30 from excessively rotating or reversing. When it is necessary to rotate the movable plate, such as for inspecting an IC package having a thickness (height), the movable plate is moved into the concave portion 23 provided in the holding cover 20, and the end portion 52 is completely removed from the groove portion 31. The movable plate 30 is rotatable by 180 degrees when it is ejected (that is, when it is free).

As shown in FIG. 1B, the stopper 50, the groove 31 of the movable plate 30 and the concave portion 23 of the press cover 20 are connected to the shaft 21 of the press cover 20 that supports the movable plate 30. , Are preferably arranged so as to be substantially on a straight line in the horizontal direction.

FIGS. 2 to 4 show specific embodiments of the rotation preventing mechanism including the stopper 50. FIG.

FIG. 2 shows a first embodiment of the rotation preventing mechanism. The stopper 50 is formed in a rod shape, for example, a column shape or a prism shape, and has a base end portion 51 and a side wall 53.
A pair of protrusions 54 are formed at opposing positions. on the other hand,
On the inner wall 25 of the concave portion 23 of the pressing member 20, a concave groove 26 into which the projection 54 fits is formed.

In the figure, two pairs of the concave grooves 26 are formed in the direction in which the stopper 50 moves.
2 is inserted into the groove 31 of the movable plate 30, the stopper 5
It suffices if at least one pair is formed at a position where the pair of protrusions 54 provided on the pair 0 are fitted. In this embodiment, the shape of the groove 31 formed in the movable plate 30 is preferably an oval. In addition, the pair of protrusions 54
It is preferable that the stopper 50 be elastically movable with respect to the side wall of the base 51.

FIG. 3 shows a second embodiment of the rotation preventing mechanism. The stopper 50 has a structure in which a pair of protrusions 54 facing the base end portion 51 and the side wall 53 are formed in the same manner as shown in FIG. On the other hand, the holding member 20
A coil spring 28 is provided between the bottom wall 27 and the stopper 50 in the recess 23 of the movable plate 30, and the stopper 50 constantly urges the stopper 50 in a direction of entering the groove 31 of the movable plate 30. 25, the stopper 50
A stopper 29 is formed to prevent the stopper from coming off.
Also in this embodiment, the shape of the groove 31 formed in the movable plate 30 is preferably an oval.

FIG. 4 shows a third embodiment of the rotation preventing mechanism. The stopper 50 has a disk shape in which a notch portion 55 cut out in an arc shape is formed, and is arranged such that the rotating shaft 56 is located in the concave portion 23 of the pressing member 20. Note that a knob 57 for rotating the stopper 50 is used.
Are appropriately formed on the upper surface of the stopper.

On the other hand, the concave portion 23 of the pressing member 20 is formed in substantially the same shape as the disk in which the arc-shaped notch portion 55 of the stopper 50 is provided, and the stopper 50 can rotate in the concave portion 23. It is configured as follows. On the other hand, unlike the first and second embodiments, the groove 31 of the movable plate 30 is preferably formed in a substantially flat bow shape.

The anti-rotation mechanism shown in FIG.
As shown in (a), normally, a circular portion facing the notch portion 55 enters the groove portion 31 to restrict the rotation of the movable plate 30, and when the movable plate 30 rotates, the circular portion shown in FIG. As shown in (), the movable plate 30 is in a free state due to the cutout portion 55, and can be rotated.

Although the case where the thickness of the IC package is different has been disclosed above, the present invention is also effective when the width of the IC package shown in FIG. 6 is different. Further, although the type in which the holding cover of the IC socket is opened and closed on the socket substrate via the hinge has been described, the present invention is also applicable to a type in which the holding cover is separated from the socket substrate. is there. Further, although the leadless type such as KGD and BGA has been exemplified as the IC package to be inspected, the present invention is also applicable to the lead type shown in FIG.

[0031]

According to the present invention, the IC socket of the present invention has a mechanism for preventing rotation of the movable plate of the holding cover of the IC socket. In addition, when the type of the IC package to be inspected is different, the movable plate can be adapted to the change of the type by simply rotating the movable plate by 180 degrees. In a stable state, excessive rotation and reversal of the movable plate can be suppressed, and damage to the IC package and the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic view of an IC socket of the present invention, wherein (a)
Is a top view, and (b) is a partially sectional side view.

FIGS. 2A and 2B are diagrams showing a first embodiment of a rotation preventing mechanism in the IC socket of the present invention, wherein FIG. 2A is a top view when a stopper end portion enters a groove of a movable plate, and FIG. () Is a top view when the end of the stopper is completely extracted from the groove of the movable plate.

3A and 3B are views showing a second embodiment of the rotation preventing mechanism in the IC socket of the present invention, wherein FIG. 3A is a top view when a stopper end portion enters a groove of a movable plate, and FIG. () Is a top view when the end of the stopper is completely extracted from the groove of the movable plate.

FIGS. 4A and 4B are diagrams showing a third embodiment of the rotation preventing mechanism in the IC socket according to the present invention, wherein FIG. 4A shows a state in which the stopper enters the groove of the movable plate, and FIG. ) Side view,
(C) is a top view when the end of the stopper is completely extracted from the groove of the movable plate.

FIG. 5 is a sectional view showing a first conventional example.

FIG. 6 is a sectional view showing a second conventional example.

FIG. 7 is a partially enlarged sectional view for explaining a problem of the conventional example.

[Explanation of symbols]

 1, 100, 200 IC socket 10, 101, 201 Socket substrate 11, 110 Claw 15, 105 Shaft 20, 102, 202 Holding cover 21, 106, 206 Shaft 22, 108, 208 (of holding cover) Open Hole window 23 Recess 24 Engagement part 25 Recess inner wall 26 Recessed groove 27 Recess bottom wall 28 Coil spring (elastic member) 29 Stopper 30, 103, 203 Movable plate 31 Groove 32, 107 Opening 40, 104, 204 Contact 50 Stopper 51 (Stop) Base end 52 (Stop) End 53 (Stop) Side wall 54 Projection 55 Notch 56 Rotation axis 57 Knob

Claims (5)

[Claims] 1. A socket substrate for supporting a contact, a holding cover having an opening window at the center thereof and being pressably attached to the socket substrate, and A rotation plate including a movable plate rotatably attached to an opening window of the holding cover via a shaft, and a stopper capable of moving forward and backward with respect to the movable plate to suppress rotation of the movable plate. An IC socket comprising: a mechanism. 2. The IC socket according to claim 1, wherein the pressing cover is hingedly connected to the substrate. 3. The rotation preventing mechanism has a rod shape, the stopper having a pair of protrusions formed on a base side wall thereof, and a concave groove into which the pair of protrusions formed on the stopper fits. A recess provided on the holding cover formed at least in pairs on the inner wall thereof; and a groove provided on the movable plate formed such that a tip of the stopper moves forward and backward. The IC socket according to claim 1 or 2, wherein: 4. The rotation preventing mechanism has a rod-like shape, and has a pair of protrusions formed on a base side wall thereof; a stopper formed at an opening end thereof; A recess provided in the press cover, in which an elastic member is disposed, and a groove provided in the movable plate, the tip of the stopper being formed to advance and retreat. The IC socket according to claim 1, wherein: 5. A disk-shaped stopper having an arc-shaped notch formed in a part of an outer periphery of the rotation preventing mechanism, and the pressing cover having a rotation center of the disk-shaped stopper therein. And a groove provided on the movable plate, which is formed in substantially the same shape as the shape of the arcuate cutout formed in the stopper. The IC socket according to claim 1 or 2, wherein