JPH04154064A - Ic socket - Google Patents

Abstract

PURPOSE:To prevent ununiformed contact of a lead with a contact pin, of an IC device, by providing constitution such that a coil spring is not brought into contact with a trim retaining cover to directly apply resilient energizing force of the spring to a retaining cover further with the trim retaining cover moved adjustable. CONSTITUTION:A coil spring 11 is constituted such that its end part is not brought into contact with a trim retaining cover 16 to directly apply resilient force of the spring to a retaining cover 15. Accordingly, at the time of a condition that a recessed part of a socket main unit 1 is closed, only one side of the trim retaining cover 16 is prevented from being strongly pressed by the retaining cover 15. The trim retaining cover 16 can be freely moved adjusted in a condition that force of the coil spring is not received at all. In this way, uniform vertical pressing force is applied as a whole to the contact part between the lead 9 of an IC device and a contact pin 4, to prevent generation of lead displacement and improper contact of the IC device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an IC socket, and more particularly to an IC socket in which an interior retaining cover is configured to be adjustable.

(Prior Art) In recent years, circuit components called IC packages, in which an element such as an IC chip is hermetically sealed in a package and a plurality of terminals (leads) are protruding from the package, have been widely used. A device called an IC socket is used to perform electrical tests on this IC device.

The structure of a conventional IC socket is shown in Figure 11 and Figure 1.
They are shown in Figure 2.

In these figures, reference numeral 1 indicates a socket body in which a recess 3 is formed on the main surface for mounting an IC device 2 such as an IC package, and an elastic function is provided around the recess 3 of the socket body 1. Four groups of contact pins each having a tip end having the same shape as the contact pin are disposed with the tip end facing each other in the center.

Further, a shaft rod 5 is attached to one end of the main surface of the socket body 1, and a holding cover 6 having a function of completely closing the recess 3 of the socket body 1 is attached to the shaft rod 5. The bearing, which has a free space perpendicular to the main surface, is rotatably mounted via the free space. Further, an interior restraint cover 7 is disposed inside the restraint cover 6 (when closed), and similarly to the restraint cover 6, it is rotatably attached to the shaft rod 5.

Convex portions 8 are formed at predetermined positions on the inner main surface of the interior restraining cover 7, and the restraining cover 6
When the concave portion 3 of the socket body 1 is closed, these convex portions 8 are connected to the elastic tip of the contact pin 4 and the IC.
The contact portion of the device 2 with the lead 9 is pressed from above to obtain a desired elastic contact. Furthermore, the interior holding cover 7 has a point 10 at the center of the inner member and outer member.
When the holding cover 6 is closed, it opens properly by itself, corrects the holding posture of the IC device 2 with respect to the lead 9, and is configured to always maintain an appropriate holding state. .

Furthermore, in order to quickly open the retainer cover 6 and stably maintain the open state, a coil spring 11 is inserted around the shaft rod 5, and a hook 12 at the end of the coil spring 11 is inserted into the inner retainer. It is hung near the shaft rod 5 on the main surface of the cover 7. Further, a lock lever 13 is attached to the other end of the presser cover 6, and when the recess 3 of the socket body 1 is closed by the presser cover 6, the presser piece 14 at the end of the presser cover 6 is locked and tightened. and is configured to maintain the closed state.

(Problem to be solved by the invention) However, in such a conventional IC socket, when the IC device 2 is mounted in the recess 3 of the socket body 1 and the holding cover 6 is closed, the leads 9 of the IC device 2 may be deformed or Although it has many practical advantages, such as completely preventing or suppressing the occurrence of lateral displacement and ensuring reliable pressure contact between the contact pin 4 and the lead 9, it also has the following problems. Ta.

In other words, the interior restraining cover 7 is configured to be able to rotate freely in response to the opening and closing of the restraining cover 6 on the one hand, and to be able to freely open and move around the center point as a fulcrum on the other hand. There is.

However, since the hook 12 of the coil spring 11 that presses and urges the retainer cover 6 in the opening direction is hung near the shaft rod 5 on the main surface of the interior retainer cover 7, when the retainer cover 6 is closed, the coil spring 11 is biased toward the opening direction. The elastic force of the coil spring 11 that attempts to lift the interior retaining cover 7 is always strongly biased toward one side (the side closer to the shaft rod).

Therefore, the elastic contact pressure with the leads 9 of the IC device 2 differs depending on the row of the contact pins 4, which may lead to poor contact with the contact pins 4 on one side in the long term.

As a solution to this problem, coil spring 11
It is conceivable that uniform and reliable contact between the leads 9 of the IC device 2 and the contact pins 4 can be ensured by changing the elastic force and the position of the fulcrum in the internal holding cover 7, respectively.

However, in this case as well, when the elastic force of the coil spring 11 fluctuates due to variations in manufacturing, the contact pressure may become unbalanced. In these cases, there is a risk of poor contact. Furthermore, the interior restraining cover 7 is used for a wide variety of IC devices 2.
However, if the fulcrum of the interior holding cover 7 is changed, it becomes difficult to make it compatible with a wide variety of IC devices 2.

The present invention was made in order to deal with the above-mentioned circumstances, and it eliminates uneven contact between the leads of the IC device and the contact pins caused by the elastic force of the coil spring in an IC socket equipped with an internal holding cover. The purpose is to provide highly compatible IC sockets.

[Structure of the Invention] (Means for Solving the Problems) The IC socket of the present invention includes an insulating socket main body having a recess into which an IC device is mounted, and an elastic function around the recess of the socket main body. a group of contact pins arranged with their tip ends facing each other; a holding cover rotatably attached to the end of the main surface of the socket body via a shaft rod; an internal restraining cover having a convex portion at a position thereof, disposed inside the restraining cover and rotatably attached to the socket body; and a coiled spring inserted around the shaft rod. and a locking mechanism that maintains this state when the concave portion of the socket body is closed by the restraining cover, and when the restraining cover is closed, the lead of the attached IC device and the tip of the contact pin are connected. , in the IC socket configured to make elastic contact, the end of the coil spring does not come into contact with the main surface of the interior retainer cover, and its elastic biasing force acts directly on the retainer cover, and the inner retainer It is characterized in that the cover is configured to be adjustable.

(Function) The IC socket of the present invention is configured so that the end of the coil spring does not come into contact with the internal holding cover and its elastic force acts directly on the holding cover. When the recess is in a closed state, only one side of the interior restraining cover is not strongly pressed. The interior restraining cover can be opened and moved freely without receiving any force from the coil spring.

Therefore, a uniform vertical pressing force is applied to the contact area between the lead of the IC device and the contact pin, and the IC
No misalignment of device leads, poor contact, etc. will occur.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 and FIG. 2 are a plan view and a schematic cross-sectional view, respectively, showing an embodiment of the IC socket of the present invention. In these figures, the same parts as in FIGS. 11 and 12 are designated by the same reference numerals, and their explanations will be omitted.

In the embodiment, the restraining cover 15 and the interior restraining cover 16 having the structure shown below each have a free space perpendicular to the main surface of the bearing, and the interior restraining cover 16 is placed inside (when closed). and is rotatably attached to the shaft rod 5.

That is, as shown in FIGS. 3 and 4, respectively,
A boss 17 is protruded near the shaft 5 on the main surface of the retaining cover 15, and the interior retaining cover 1 disposed inside the boss 17
At the position corresponding to 6, there is a hole 1 through which this boss 17 is inserted.
8 is open.

+, the height of the boss 17 formed on the retainer cover 15 is greater than the thickness of the corresponding portion of the interior retainer cover 16, and the upper part of the boss 17 passes through the hole 18 of the interior retainer cover 16 and protrudes upward. is configured to do so.

Next, the operation of this IC socket will be explained with reference to FIG.

As shown in the figure, the IC device F is placed in the recess 3 of the socket body 1.
2 and its lead 9 is brought into contact with the elastic tip of the contact pin 4, then the holding cover 15 and the inner holding cover 16 are attached.
together with the coil spring 11 in the closing direction,
When the contact portion between the lead 9 and the contact pin 4 is pressed by the convex portion 8 of the interior retainer cover 16, the hook 12 of the coil spring 11 is hung on the upper surface of the boss 17 formed on the retainer cover 15, and the inner retainer No elastic force of the coil spring 11 in the opening direction is applied to the cover 16 at all.

Further, since the height of the boss 17 is greater than the thickness of the interior restraining cover 16, the interior restraining cover 16 has a degree of freedom in the thickness direction, and therefore can be opened more freely.

As a result, when the restraining cover 15 is closed, the convex portion 8 of the interior restraining cover 16 is inclined forward. In addition, in such a closing operation of the restraining cover 15, the interior restraining cover 16 rotates independently with respect to the restraining cover 15, and there is a free space in the upward direction (perpendicular to the main surface), and Since the inner member and the outer member are supported at two points, it is easy to maintain a horizontal state. Therefore, a uniform pressing force is applied over the entire surface of the interior restraining cover 16, and it can correspond to the leads 9 of the IC device 2 with high accuracy and reliability without causing any positional deviation or the like.

Next, another embodiment of the present invention will be described.

In the embodiment shown in FIG. 6, in place of the boss in the previous embodiment, a
A pair of raised parts 19 are provided close to each other, and cuts are made from both sides near the shaft 5 of the interior restraining cover 16 so that the narrow part 20 passes between the raised parts 19 and reaches the shaft 5. It is configured.

In the embodiment configured in this way, the hook 12 of the coil spring 11 is hung between the protrusions 19 of the restraining cover 15, and the inner restraining cover 16
Therefore, the holding cover 15 does not contact the main surface of the
The leads 9 of the IC device 2 and the contact pins 4 can be pressed into contact with each other accurately and reliably without causing misalignment or the like when the IC device 2 is closed.

In addition, in the embodiment shown in FIG.
A U-shaped rod-shaped stopper 21, as shown in FIG. 8, is attached near the shaft rod 5 on the main surface of the housing, straddling the interior restraining cover 16.

Also in this embodiment, the hook 12 of the coil spring 11 does not come into contact with the interior restraining cover 16, but rests on the upper surface of a stopper 21, and presses and urges the restraining cover 15 via this stopper 21.

Therefore, the leads of the IC device 2 and the contact pins 4
Uniform and reliable pressing contact is achieved.

In addition, since the stopper 21 is U-shaped and has legs with a slight height, a gap is created between the lower surface of the stopper 21 and the main surface of the interior restraining cover 16. The opening movement is not obstructed.

Further, in the embodiment shown in FIG. 9, as shown in an enlarged view in FIG. 10, a coil spring 11 is used in which the tip of the hook 12 is bent downward by 90 degrees.
This hook 12 passes through a slit-shaped through hole 22 formed in the main surface of the interior restraining cover 16, and directly contacts and presses the lower restraining cover 15.

In the embodiment with such a structure, the hook 12 of the coil spring 11 is in contact with the main surface of the restraining cover 15, as in the previous embodiment, and the elastic force in the opening direction is applied to the interior restraining cover 16. It is not held directly at the side. Also,
Free opening movement of the interior restraining cover 16 is ensured. Therefore, with such an interior suppressing cover 16, the IC
A uniform vertical pressing force is applied to the entire contact area between the lead 9 of the device 2 and the contact pin 4, and the reliability of the connection is high.

Note that the present invention is not limited to the above embodiments, and can be implemented in other embodiments.

[Effects of the Invention] As explained above, in the IC socket according to the present invention, when the concave portion of the socket body is closed by the holding cover, the elastic force of the coil spring is not applied directly to the internal holding cover. Since it is adjustable and kept in a free state, it opens properly and corrects the defective holding position for the IC device lead, always maintaining a uniform holding position.

Therefore, a uniform and perpendicular pressing force is applied to the contact portion between the lead of the IC device and the contact pin, resulting in high connection reliability and stable test results.

[Brief explanation of the drawing]

1 and 2 are a plan view and a schematic sectional view showing an embodiment of the IC socket of the present invention, respectively, and FIG. 3 is a plan view showing the holding cover of the embodiment of FIG. 1 taken out. , FIG. 4 is a plan view of the same example with the interior retaining cover taken out, FIG. 5 is a schematic cross-sectional view for explaining the operation of the IC socket of the example, and FIGS. 9 and 9 are respectively plan views showing other embodiments of the present invention, FIG. 8 is a perspective view of a stopper used in the embodiment of FIG. 7, and FIG. 10 is an embodiment of the embodiment of FIG. The front view of the f-r illumination spring used in the example, FIG. 11, and FIG. 12 are a plan view and a cross-sectional view, respectively, showing a conventional IC socket. 1...Socket body 2...IC device 4...Contact pin 5...Axle rod 9... ...Lead 11 ...Coil spring 12 ...
...Hook 13 ... Lock lever 15 ... Holding cover 16 ... Interior holding cover 17 ...
...Boss 18 ...... Hole 19 ...... Raised portion 21 ... Stopper 22 ...... Transparent Hole Figure 1 Figure 2

Claims (1)

[Claims] (1) An insulating socket body having a recess for mounting an IC device, a group of contact pins disposed around the recess of the socket body with their tip portions having an elastic function facing each other, and A holding cover is rotatably attached to the end of the main surface of the socket body via an axis rod, and a convex portion is provided at a predetermined position on the inner main surface, and the holding cover is disposed inside the holding cover. When the concave portion of the socket body is closed by the interior restraining cover rotatably attached to the socket body, the coiled spring inserted around the shaft rod, and the restraining cover, this state can be achieved. In the IC socket, the end of the coil spring is provided with a locking mechanism for holding the IC socket, and is configured such that the lead of an attached IC device and the tip of the contact pin come into elastic contact when the holding cover is closed. The IC socket is characterized in that the inner retaining cover is configured to be able to be adjusted so that its elastic biasing force acts directly on the retaining cover without causing the inner retaining cover to come into contact with the main surface of the inner retaining cover.