JPH10255941A - Socket for bga device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for a BGA device of simple constitution in which engagement/removal of the BGA device with/from the socket can be performed only by vertically operating it. SOLUTION: A protrusion 22 is provided on an upper surface of a base, a contact 3 is provided to be applied to the protrusion 22, a slider 4 having a groove 42 to receive the protrusion 22 is provided on the upper surface of the base to be slidable in one direction 11, the slider 4 and the contact 3 are engaged with each other to set a contact part 31 of the contact 3 movable to/from the protrusion 22 a cover 5 to cover the slider to be movable in an extension direction of the protrusion 22 is provided on the base, and a drive mechanism 6 to convert a vertical move of the cover 5 into a move in the direction 11 to be transmitted to the slider 4 is provided between the slider 4 and the cover 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a BGA device having an electronic device main body having a flat bottom surface and a plurality of ball terminals arranged in a plurality of rows along one direction on the bottom surface of the electronic device main body. On the other hand, the present invention relates to a socket for connecting this BGA device to a test circuit board when performing a reliability test, particularly a burn-in test.

[0002]

2. Description of the Related Art A conventional socket for a BGA device of this type is disclosed in JP-A-8-64320 (hereinafter referred to as "first prior art") or JP-A-8-50975.
Japanese Patent Application Publication (hereinafter, referred to as “second related art”).

In the first prior art, when a BGA device is connected to a socket, a lever which is engaged with the BGA device is rotated by pressing down a cover, and a slider plate is slid by the lever, and a contact of a contact is formed by the slider plate. The bifurcated contact portion is pushed and spread, then the BGA device is mounted on the slider plate through the opening of the cover, and the ball terminal of the BGA device is inserted between the pushed contact portions. , The slider plate returns to its original position by the urging force of the compression coil spring, and the bifurcated contact portion of the contact is closed by its own elastic force. As a result, this contact portion becomes a ball terminal. It comes in contact with the side of the. When the BGA device is detached from the socket, the contact portion of the contact is pushed and spread as described above by pressing down the cover again, so that the BGA device can be detached from the socket.

In the second prior art, when a BGA device is connected to a socket, a lever connected to a cam is operated to slide a bent plate engaged with the cam, and the contact is made by the bent plate. Is bent, and the contact portion of the contact is brought into contact with the side surface of the ball terminal of the BGA device mounted on the support member by the bending of the contact. Also, when removing the BGA device from the socket,
By operating the lever, the cam disengages from the bending plate, thereby disengaging the contact from the bending plate, and the contact returns to its normal state by its own restoring force. The BGA device is detached from the socket by separating from the ball terminal of the BGA device.

[0005]

In the first prior art, a BGA device can be fitted to and detached from a socket simply by operating a cover in a vertical direction. Thus, there is an advantage that the fitting / removal of the BGA device to / from the socket can be automated. However, in the first prior art, the contact portion of the contact has to be formed in a forked shape, so that the shape of the contact is complicated, and moreover,
There is a disadvantage that the mechanism for opening and closing the bifurcated contact portion is complicated. Because of this,
There was a problem that the manufacturing cost was high.

In the second prior art, the lever is operated to slide the bending plate, and the movement of the bending plate causes the contact portion of the contact to contact and separate from the ball terminal of the BGA device. With the current automatic mounting apparatus, it is impossible to operate the lever, and therefore, in the second conventional technique, it is impossible to automate the fitting / removal of the BGA device with respect to the socket.
Moreover, the second prior art requires a large number of plates, such as a base member, a bent plate, and a support member, in the configuration, so that the configuration is complicated similarly to the first prior art, and the manufacturing cost is particularly low. There was a problem saying it was expensive.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a BGA device which can be fitted / removed with a socket of a BGA device simply by operating the device in a vertical direction, and which has a simple structure.
To provide a socket for a device.

[0008]

According to the present invention, an electronic device body having a flat bottom surface and a plurality of ball terminals arranged in a plurality of rows on the bottom surface in one direction are provided. A socket for a BGA device having a base, a plurality of contacts, a slider, a cover,
A drive mechanism, wherein the base is provided on the base body so as to protrude from the plane corresponding to the ball terminal, and the base is provided at a uniform height, the base body having a flat surface facing the bottom surface. Having a plurality of projections,
Each of the contacts is made of an elastic conductive material, and has a contact portion that contacts the ball terminal, and a swing portion connected to the contact portion, and at least the contact portion is formed in the one direction. The contact portion is provided on the base main body so as to face an upper end portion of the projection, and the contact portion is freely approachable / separable from the upper end portion in the one direction, and is separated from the upper end portion when separated from the upper end portion. And the ball terminal can be inserted and withdrawn, and the swinging portion has a restoring force for returning the contact portion and the slider to the original position when the contact portion is separated from the upper end portion. The slider has a plurality of grooves and a plurality of plate-shaped portions, and is slidably disposed along the one direction on the plane, and each groove is provided in the one direction. Extending along the protrusions, side by side The contact portion and the swinging portion are received, and the contact portion is configured to receive the ball terminal when the contact portion is separated from the upper end portion. Each of the plate-shaped portions is provided between the adjacent grooves. Is composed of
The protrusion has substantially the same height as the protrusion, and is slidably disposed along the one direction between the rows of the protrusions arranged along the one direction. And the cover covers the slider and the B
An opening for letting a GA device pass over the slider, provided on the base so as to be movable in a direction perpendicular to the plane, wherein the drive mechanism moves the cover when the cover approaches the slider; Is converted to the one-way motion and transmitted to the slider, whereby the contact portion is separated from the upper end portion, thereby obtaining a socket for a BGA device.

According to the second aspect of the present invention, the contact is provided with an engaging portion, the plate-like portion is provided with a notch, and the engaging portion is inserted into the notch. The BGA device socket according to claim 1, wherein the contact and the plate-shaped portion are engaged.

According to the third aspect of the present invention, there is provided the BGA device socket according to the first or second aspect, wherein the drive mechanism is a link mechanism.

According to a fourth aspect of the present invention, the driving mechanism is a cam mechanism.
The described socket for a BGA device is obtained.

[0012]

FIG. 1 is a plan view of a BGA device socket according to an embodiment of the present invention, FIG. 2 is a front view of the BGA device socket shown in FIG. 1, and FIG. 3 is a BGA device socket shown in FIG. 4 shows a base of the socket for the BGA device shown in FIG. 1, (a) is a plan view, (b) is a front view, (c) is a side view, and FIG. 5 is a base shown in FIG. FIG. 4A is a cross-sectional view of a main part of FIG.
4A is a sectional view taken along line AA, FIG. 6B is a sectional view taken along line BB in FIG. 4A, FIG. 6 shows a contact of the socket for the BGA device shown in FIG. FIG. 7 (b) is a front view, FIG. 7 shows the slider of the BGA device socket shown in FIG. 1, (a) is a plan view, (b) is a front view, and (c).
8 is a side view, FIG. 8 is a cross-sectional view of a main part of the slider shown in FIG. 7, (a) is a cross-sectional view taken along line CC of FIG.
FIG. 9B is a cross-sectional view taken along line DD of FIG.
The cover of the socket for the BGA device shown in FIG.
(A) is a plan view, (b) is a front view, (c) is a side view,
(D) is a bottom view.

Referring to FIG. 1 to FIG.
The GA device socket 1 is mounted on a burn-in test circuit board (not shown), and a BGA device 9 (FIG. 11).
(B) is connected to the burn-in test circuit board. By the way, this BGA device 9 is LS
I (electronic device main body, not shown) resin-sealed, and has a flat bottom surface 91a;
One direction (FIG. 11)
(A) and (b), in the left-right direction (hereinafter, referred to as “first direction”). Note that this BGA device 9
Not only in the first direction 11, but also in the vertical direction (hereinafter, referred to as "second direction") 12 in FIG.
Since the ball terminals 92 are arranged in many rows, the ball terminals 92 are arranged in a matrix.

The BGA device socket 1 of the present embodiment
Is a base 2, a plurality of contacts 3, and a slider 4
, A cover 5, and a drive mechanism 6.

The base 2 has a base body 21 and a number of projections 22, as shown in FIG. The base body 21 has a substantially rectangular parallelepiped shape. When the BGA device 9 is mounted on the slider 4 combined therewith,
Plane (upper surface) 2 facing bottom surface 91a of GA device 9
1a. An opening 23 is formed in a central portion of the base body 21, and a first convex portion 24 is formed on each of both end surfaces in the second direction 12, and on both end surfaces in the first direction 11, Each has a second convex portion 25. Further, at four corners of the upper surface 21a of the base body 21, cover holding portions 26 having holding holes 26a for slidably receiving supports 53 of the cover 5 described later are formed. Further, a first shaft 27 is formed at both ends of one side of the base body 21 in the first direction 11.
On the other hand, each of the projections 22 has a base body 21 so that its upper part projects from the upper surface 21a of the base body 21.
It is provided in. The arrangement of the projections 22 is the same as the arrangement of the ball terminals 92, and is formed in a matrix. Further, these projections 22 are in a direction perpendicular to the upper surface 21a of the base body 21 (hereinafter, referred to as a “third direction”).
13 and are aligned at the same height.
As shown in FIG. 5, the inside of the base body 21 also extends along the third direction 13. The upper part of each protrusion 22 is wedge-shaped, and the lower part is prismatic. Adjacent protrusions 22
There is a gap between them, and in particular, this gap forms an insertion hole 28 for inserting the contact 3 inside the base body 21.

Each contact 3 is made of a conductive material having elasticity. As shown in FIG. 6, a contact portion 31, an engaging portion 32, a swing portion 33, a press-fitting portion 34, a terminal portion 35 Are integrally provided. The contact portion 31 contacts the side surface of the ball terminal 92. The engagement portion 32 is protruded from one side of the contact portion 31 and is inserted into an engagement groove 43a formed in a plate-shaped portion 43 described later.
Are engaged with the slider 4 via the engaging portions 32. The swing portion 33 is connected to one end of the contact portion 31 and is swingable when the contact 3 is fixed to the base body 21. The press-fitting portion 34 is connected to one end of the swinging portion 33, and the press-fitting portion 34 is formed with a press-fit dowel 34a. The terminal portion 35 is connected to one end of the press-fit portion 34, inserted into a through-hole of the burn-in test circuit board, and connected thereto. Each contact 3 has an engaging portion 32
Except for the terminal portion 35 and the first direction 11, it is fixed to the base body 21 so as to face the projection 22 in the first direction 11. The contact 3 is fixed by inserting the press-fit dowel portion 34a into the insertion hole 2.
8 by press-fitting. In such a fixed state, the contact portion 31 and the swinging portion 33 are in contact with one side surface of the protrusion 22, and the contact portion 31 is further moved by the swinging portion 33 in the first direction. The swinging part 33 is movable toward and away from the upper end of the contact part 31.
When the contact is separated from the upper end of the projection 22, the contact 3
1 and a restoring force for returning the slider 4 engaged with the contact 3 to the original position. When the contact portion 31 is separated from the upper end of the projection 22, the BG is placed between the contact portion 31 and the upper end of the projection 22.
The ball terminal 92 of the A device 9 can be inserted and removed (inserted / removed).

The slider 4 is provided on the upper surface 21 of the base body 21.
a, it is slidably disposed along the first direction 11. The slider 4 has an opening 4 as shown in FIG.
1, a large number of grooves 42, a large number of plate-shaped portions 43, a holding portion 44, an engaging portion 45, and a second shaft 46. The opening 41 is formed at the center of the slider 4. The groove 42 is formed so as to surround the opening 41, extends along the first direction 11, and extends in the second direction 1.
2 are formed at predetermined intervals. This groove 42
Inside, when the slider 4 is combined with the base 2, the projection 22, the contact portion 31 and the swing portion 33 are received,
Further, when the contact portion 31 is separated from the upper end of the protrusion 22, the ball terminal 92 of the BGA device 9 mounted on the slider 4 is received. The space between the adjacent grooves 42 is left in a plate shape, and this portion forms a plate-shaped portion 43. The height of the groove 42 and the plate-shaped portion 43 is substantially the same as the height from the upper surface 21 a of the base body 21 to the upper end of the projection 22. The plate-shaped portion 43 is slidably arranged along the first direction 11 between rows of the protrusions 22 arranged along the first direction 11. Notches 43a are formed in the plate-like portion 43 at the same interval as the interval between the protrusions 22. The engagement portion 32 of the contact 3 is inserted into each notch 43a, whereby the plate-shaped portion 43 and the contact 3 are engaged, and the movement of the slider 4 is transmitted to the contact 3. I have. The holding portions 44 are formed at the four corners of the upper surface of the slider 4, extend along the third direction 13,
The GA device 9 is invited and held. The engaging portion 45 is
It has a substantially frame shape, and the inside thereof is a window hole 45a.
The engagement portion 45 is provided on the slider 4 in the second direction 12.
Are provided at the center of the lower edge of both end faces. First direction 11
Is longer than the length of the first projection 24 of the base body 21 by the distance the slider 4 slides. Further, the engaging portion 45 and the first convex portion 2
4, the inner upper surface of the window hole 45a and the upper surface of the first convex portion 24 are in sliding contact with each other.
The slider 4 can smoothly slide in the first direction 11 without being lifted from the base body 21. The second shaft 46 is the first shaft of the slider 4.
Are formed at both ends of one side in the direction 11 of FIG.

The cover 5 has a substantially frame shape and covers the slider 4 and has an opening 51 for passing the BGA device 9 over the slider 4 as shown in FIG. A substantially plate-shaped engaging portion 52 is provided on both end surfaces of the cover 5 in the first direction 11. The engaging portion 52 has a window hole 52a. The width of the window 52a in the second direction 12 is substantially equal to the width of the second convex portion 25 of the base body 21, and the height of the window 52a in the third direction 13 is Slider 4 of 5
The second convex portion 25 of the base 2 by the moving distance with respect to
Higher than the height of the. In the vicinity of the four corners of the lower surface of the cover 5, cover holding portions 26 formed on the base 2 are provided.
Is provided in the holding hole 26a. A compression spring 7 interposed between the base 2 and the cover 5 is mounted on the support 53. Furthermore,
First to third cover portions 54, 55, and 56 are formed on both end surfaces of the cover 5 in the second direction 12, respectively. These first to third cover portions 54, 55, 56
Have concave portions 54a, 55a, 56a on the inside, respectively, and are configured to cover the ends of the first and second shafts 27, 46 and a third shaft 63 described later.

When the support 53 on which the above-described compression spring 7 is mounted is inserted into the holding hole 26a and the second projection 25 is fitted into the window 52a, the cover 5 moves in the third direction 13. Freely attached to the base 2, and
The movement distance of the cover 5 in the third direction 13 is restricted by the cover 5, and the cover 5 is prevented from falling off the base 2. Further, the compression spring 7 moves in the third direction 13
The cover 5 is urged away from the base 2.

The drive mechanism 6 is a link mechanism in this embodiment. This link mechanism 6, as shown in FIG.
It comprises a first link 61 and a second link 62. One end of the first link 61 is connected to a first link provided on the base 2.
One end of the second link 62 is pivotally connected to a second shaft 46 provided on the slider 4 so as to be freely rotatable. Further, the other end of the first link 61,
The other end of the second link 62 is rotatably connected by a third shaft 63. When the cover 5 is farthest from the slider 4, the first link 61 and the second link 62 are connected so as to be bent, so that the cover 5 is pressed and , The connecting portion between the first link 61 and the second link 62 is pressed by the lower surface of the cover 5, and the degree of bending of the first link 61 and the second link 62 gradually decreases. 2, the second shaft 46 moves to the right in the drawing, and as a result, the slider 4 also moves to the right.

FIGS. 10A and 10B show a state before the BGA device is connected to the BGA device socket shown in FIG. 1, wherein FIG. 10A is a plan view and FIG. 10B is a cross section taken along line EE of FIG. FIG. 11 shows a state immediately before connecting a BGA device to the BGA device socket shown in FIG.
(A) is a plan view, (b) is a cross-sectional view taken along line FF of (a), FIG. 12 shows a main part of the socket for the BGA device shown in FIG. 10, and (a) is FIG. 11, (b) is a cross-sectional view taken along line GG of (a), (c) is a cross-sectional view taken along line HH of (a), and FIG. 13 is a view B of FIG.
FIG. 11A shows a main part of a socket for a GA device, and FIG.
FIG. 14A is an enlarged view of a portion B, FIG. 14B is a cross-sectional view taken along line II of FIG. 14A, FIG. 14 is a view illustrating a main part of the BGA device socket illustrated in FIG. 11, and FIG. FIG. 11A is an enlarged view of a state immediately before the contact and the ball terminal make contact with each other in a portion B shown in FIG. 11A, FIG. 15B is a cross-sectional view taken along the line JJ of FIG. (A) is an enlarged view of a state where a contact and a ball terminal are in contact with a portion B shown in FIG. 11 (a), and (b) is a cross section taken along line KK of (a). FIG.

Next, the operation of the BGA device socket of this embodiment will be described with reference to FIGS.

As shown in FIG. 10, in a normal state, the cover 5 is at the highest position by the urging force of the compression spring 7. In this state, as shown in FIG. 12, the contact 3 is in close contact with the projection 22 of the base 2.

In this state, when the cover 5 is pressed downward, as shown in FIG.
The connecting portion between the first link 61 and the second link 62 is pressed downward, and together with this, the first and second links 61 and 62 are pressed.
62 opens about the third axis 63. At this time, since the first shaft 27 is fixed, the second and third shafts 4
6 and 63 move rightward in FIG. 11, and the slider 4 also moves rightward. As a result, as shown in FIG. 13, the contact portion 31 of the contact 3 engaged with the slider 4 via the engaging portion 32 also moves rightward in FIG. 13, and the contact portion 31 and the corresponding projection The gap between the upper end of the opening 22 is opened.
At the same time, the swinging portion 33 tilts rightward, and a restoring force is generated in the swinging portion 33 so as to return the contact portion 31 and the slider 4 to their original positions.

Next, as shown in FIG. 14, when the BGA device 9 is mounted on the slider 4, the ball terminals 92 of the BGA device 9 make contact between the contact portion 31 and the upper end of the corresponding projection 22. Inserted between. At this time, still,
The ball terminal 92 and the contact portion 31 are not in contact.

When the pressing force applied to the cover 5 is released from this state, the slider 4 enters a free state. As shown in FIG.
1 moves to the left, and as a result, the contact portion 3 of the contact 3
1 and the ball terminal 92 of the BGA device 9
The BGA device 9 is connected to the GA device socket 1.

To remove the BGA device 9 from the BGA device socket 1, the above-described series of operations may be performed in reverse. First, the cover 5 is pressed, and the contact portion 31 and the upper end of the corresponding projection 22 are pressed. Open between the department, in this state,
When the BGA device 9 is removed and the pressing force applied to the cover 5 is released, the contact portion 31 and the slider 4 return to their normal positions due to the restoring force of the swing portion 33, and at the same time, the cover 5 It returns to the original position by the urging force.

In this embodiment, the drive mechanism 6 is
Although the link mechanism is used, the invention is not limited thereto, and a cam mechanism may be used. Specifically, the slider 4 and the cover 5
Of these, one is provided with a protrusion, and the other is provided with a cam groove for receiving the protrusion. With this cam groove, the movement of the cover 5 in the third direction is converted into the movement in the first direction and transmitted to the slider 4. You may do it. Further, as the driving mechanism, various mechanisms such as a mechanism using a rack and pinion can be considered, and therefore, the driving mechanism is not particularly limited.

[0029]

The socket for a BGA device according to the present invention
Since the BGA device can be fitted / removed simply by operating the cover in the vertical direction, the fitting / removing of the BGA device can be automated using an automatic mounting apparatus.

In addition, the BGA device socket of the present invention has a simpler structure than the conventional one, so that the manufacturing cost can be reduced as compared with the conventional one.

[Brief description of the drawings]

FIG. 1 is a plan view of a BGA device socket according to an embodiment of the present invention.

FIG. 2 is a front view of the BGA device socket shown in FIG. 1;

FIG. 3 is a side view of the BGA device socket shown in FIG. 1;

4A and 4B show a base of the socket for a BGA device shown in FIG. 1, wherein FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.

5 is a sectional view of a main part of the base shown in FIG. 4,
4A is a cross-sectional view taken along line AA of FIG. 4A, and FIG. 4B is a cross-sectional view taken along line BB of FIG.

6A and 6B show the contacts of the BGA device socket shown in FIG. 1, wherein FIG. 6A is a side view and FIG. 6B is a front view.

7A and 7B show a slider of the socket for a BGA device shown in FIG. 1, wherein FIG. 7A is a plan view, FIG. 7B is a front view, and FIG.

8 is a sectional view of a main part of the slider shown in FIG. 7,
7A is a cross-sectional view taken along line CC of FIG. 7A, and FIG. 7B is a cross-sectional view taken along line DD of FIG. 7A.

9A and 9B show a cover of the socket for the BGA device shown in FIG. 1, wherein FIG. 9A is a plan view, FIG. 9B is a front view, FIG. 9C is a side view, and FIG.

10A and 10B show a state before a BGA device is connected to the BGA device socket shown in FIG. 1, where FIG. 10A is a plan view and FIG. 10B is a cross-sectional view taken along line EE of FIG. is there.

11A shows a state immediately before a BGA device is connected to the BGA device socket shown in FIG. 1, and FIG.
Is a plan view, and (b) is a cross-sectional view taken along line FF of (a).

12 shows an essential part of the socket for the BGA device shown in FIG. 10, (a) is an enlarged view of a part A shown in FIG. 10 (a),
(B) is a sectional view taken along line GG of (a), (c) is (a)
FIG. 3 is a sectional view taken along line HH of FIG.

13 shows a main part of the socket for a BGA device shown in FIG. 11, (a) is an enlarged view of a B part shown in FIG. 11 (a),
FIG. 2B is a cross-sectional view taken along line II of FIG.

14A and 14B show an essential part of the socket for a BGA device shown in FIG. 11; FIG. 14A is an enlarged view of a state immediately before a contact and a ball terminal come into contact in a part B shown in FIG. 11A; FIG. 3A is a cross-sectional view taken along line JJ of FIG.

15 shows an essential part of the socket for a BGA device shown in FIG. 11, wherein FIG. 15 (a) is an enlarged view of a state where a contact and a ball terminal are in contact with a part B shown in FIG. 11 (a),
(B) is a sectional view taken along line KK of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 BGA device socket 2 Base 3 Contact 4 Slider 5 Cover 6 Drive mechanism 7 Compression spring 9 BGA device 21 Base main body 21a Flat surface (upper surface) 22 Projection 23 Opening 24 First convex part 25 Second convex part 26 Cover holding part 26a Holding hole 27 First shaft 28 Insertion hole 31 Contact part 32 Engaging part 33 Swing part 34 Press-fit part 34a Press-fit dowel part 35 Terminal part 41 Opening 42 Groove 43 Plate-like part 43a Engaging groove 44 Holding part 45 Engagement Portion 45a Window hole 46 Second shaft 51 Opening 52 Engagement portion 52a Window hole 53 Support 61 First link 62 Second link 63 Third shaft 91 Package 91a Bottom surface 92 Ball terminal

Claims (4)

[Claims] 1. A BGA device socket comprising: an electronic device body having a flat bottom surface; and a plurality of ball terminals arranged in a plurality of rows on the bottom surface in one direction, comprising: a base; A contact, a slider, a cover, and a drive mechanism, wherein the base has a base body having a flat surface facing the bottom surface, and the base body has a surface protruding from the flat surface corresponding to the ball terminal. A plurality of protrusions provided at a uniform height, wherein each of the contacts is made of an elastic conductive material, and is provided in contact with the ball terminal; Having a swinging portion, provided at the base body so that at least the contact portion is opposed to the upper end portion of the protrusion in the one direction, the contact portion is with respect to the upper end portion in the one direction hand The ball terminal can be approached / separated freely, and can be inserted and withdrawn from the upper end when separated from the upper end, and the swinging part has the contact part separated from the upper end. Sometimes, a restoring force for returning the contact portion and the slider to the original position is generated.The slider has a plurality of grooves and a plurality of plate-shaped portions, and the The grooves are slidably arranged along one direction, and each of the grooves extends along the one direction, and receives the protrusion, and the contact portion and the swing portion,
Further, when the contact portion is separated from the upper end portion, the ball terminal is received, and each plate-like portion is formed between the adjacent grooves, and is substantially the same as the protrusion. Having a height, slidably disposed along the one direction, between the rows of the protrusions arranged along the one direction, and further engaging with the contact; An opening for covering the slider and passing the BGA device over the slider is provided on the base so as to be movable in a direction perpendicular to the plane. The drive mechanism is provided when the cover approaches the slider. A BGA device that converts the movement of the cover into the one-way movement and transmits the one-direction movement to the slider, thereby separating the contact portion from the upper end portion. Scan for socket. 2. The contact and the plate-shaped part are provided by providing an engagement part in the contact, a notch in the plate-shaped part, and inserting the engagement part into the notch. The socket for a BGA device according to claim 1, wherein is engaged. 3. The BGA device socket according to claim 1, wherein the drive mechanism is a link mechanism. 4. The BGA device socket according to claim 1, wherein the drive mechanism is a cam mechanism.