JPH07106036A - Positioning device for electronic parts in socket - Google Patents

Abstract

PURPOSE:To ensure mounting of electronics parts in a fixed position on a socket by having a detent to be abutted on the outer edge of the electronic parts interlocked with a displacement preventing member inserted in the hole provided on the electronic parts. CONSTITUTION:The main body of electronic parts 2 such as a lead frame 2A is of rectangular shape and has two outer edges extended in parallel in the longitudinal direction, and is provided with a hole provided on a proper point of the parts 2 from the electronic parts loaded part on a socket, as a positioning means, for example, a displacement-preventing member 12, which is inserted in the hole 8 provided on a lug part 9, and by which lateral movement of the parts 2 is inhibited, and a detent member 13, which is abutted on at least one of the opposed outer edges of the parts 2, and by which movement in rotation of the parts 2 such as the member 12 is inhibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounted on a socket, and more particularly to a positioning device for mounting a relatively narrow and flat lead frame bonded with an IC chip at a fixed position on the socket.

[0002]

2. Description of the Related Art A lead frame has a lead group punched from a strip-shaped sheet material, the outer ends of the lead group are connected by an ear portion of the sheet material having a plurality of holes, and the inner end of the lead group is a sheet material. Is bonded to an IC chip mounted on a base member punched and formed in the central portion of. Such a lead frame is inspected by using a socket. At this time, a positioning means for mounting the lead frame at a fixed position and associating each lead of the lead frame with each contact of the socket is indispensable.

Conventionally, as this positioning means, a large number of holes formed in rows in the ears of the lead frame and the like are used, and three or four posts provided in the socket are inserted into the holes near the row ends to prevent rotation. We are trying to prevent slippage.

Usually, a plurality of lead patterns are punched side by side in the lead frame to form an elongated shape. However, in order to prevent rotation and displacement in such an elongated lead frame, the posts are formed at corners at both ends in the longitudinal direction. A design that inserts is required.

[0005]

However, in the above-mentioned conventional example, while the rotation stop and the shift stop are effectively achieved, the number of posts necessary for positioning is inserted into the holes arranged at both end corners of the lead frame. Therefore, there is a problem that the edge of the lead frame is often caught in the post due to the inclination when the lead frame is attached and detached, and the frame is difficult to come off.

Further, the lead frame has a problem that warping and manufacturing errors become large near both ends, it is difficult to accurately obtain the post and the hole, and positioning failure occurs. With design constraints that must be produced to comply with

Further, in the conventional example, post insertion holes are provided in each of the facing ears of an electronic component such as a lead frame, and such holes are provided unevenly.
If it is provided only on one ear, it cannot be performed.

[0008]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and as a means therefor, the socket is inserted into a hole provided at a proper position of the rectangular electronic component to laterally move the electronic component. And a detent member that abuts on at least one outer edge of the opposing outer edges of the electronic component to prevent rotation of the electronic component about the misalignment member. The electronic device positioning device in FIG.

[0009]

According to the present invention, the detent member that comes into contact with the outer edge of the electronic component cooperates with the shift preventing member that is inserted into the hole provided in the electronic component, and the electronic component is fixed to the socket at a fixed position. It can be installed reliably.

Since the deviation preventing member inserted into the hole is inserted into a limited hole of an electronic component such as a lead frame and cooperates with the rotation preventing member, the insertion position of the deviation preventing member is not limited to both ends of the electronic component. It can be freely selected, for example, by arranging it near the center part, and by selecting this insertion position, problems such as hooking with the post at the time of attachment / detachment of the lead frame and deformation accompanying it can be effectively solved, and at the same time, the lead frame For avoiding manufacturing error and warp of both ends, select an arbitrary hole that is not affected by these and insert the anti-rotation member, and cooperate with the anti-rotation member to share the anti-rotation function and anti-misalignment function. Can be achieved without regret.

The present invention includes not only the lead frame made of a sheet material but also an IC package to be mounted in a socket, an IC carrier, and an electronic component in which a lead frame and an IC chip are held in an insulating film.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.

The socket base 1 formed of an insulating material has a large number of contacts 4 corresponding to a large number of leads protruding laterally of the electronic component 2 and a large number of leads 3 backed up by an insulating material. Each lead 3 is placed on each contact 4, and a pressing pad 15 provided on the inner surface of the cover 5 by closing the pressing cover 5 on the socket base 1
Thus, the lead 3 is pressed against the contact 4 to obtain a contact pressure.

The cover 5 is openably and closably connected to the socket base 1 via a hinge, or is formed of a component or a jig of a robot formed separately from the socket base 1. A lock member 6 holds the cover 5 closed.

The embodiment shows a lead frame 2A as an example of the electronic component 2. As described above, this lead frame 2A is formed by punching a plurality of lead group units on a strip-shaped metal sheet and punching the IC support base 7 integrally at the center. The outer ends are connected at the ears 9 of the frame in which a plurality of holes 8 are formed in a row, the IC chip 10 is supported on the base 7, and this is bonded and connected to the inner ends of the lead group 3.

The IC chip 10 is covered with an insulating resin 11, mounted on a socket, and after the inspection, the ear 9 having the hole 8 is cut off to separate the lead group.

Positioning means for mounting the lead frame 2A at a fixed position is provided in this socket.

The body of the electronic component 2 represented by the lead frame 2A has a rectangular shape.
Has two outer edges extending parallel to the longitudinal direction, and serves as the positioning means, a hole provided at an appropriate position of the rectangular electronic component 2 from the electronic component mounting portion of the socket, for example, a hole 8 provided in the ear portion 9. Of the electronic component 2 that is inserted in the electronic component 2 to prevent lateral movement of the electronic component 2 and the electronic component 2 that is in contact with at least one outer edge of the opposing outer edges of the electronic component 2 and that has the displacement prevention member 12 as the center. And a detent member 13 for preventing the rotation of the.

When the electronic part mounting base 14 is elastically mounted on the socket base 1 so as to be vertically movable, the displacement preventing member 12 and the rotation stopping member 13 are provided on the mounting base 14.

1 to 6 show a post 13a made up of four cylinders that abut against both ends of the outer edges of the left and right ears 9 of the lead frame 2A to prevent rotation, and this is used as the rotation preventing member 13. At the same time, a single post 12a is inserted into any one of the holes 8 formed in the ear portion 9 in a row to form a deviation preventing member 12.

For this post 12a, one hole 8 near the middle portion of the lead frame 2A is selected and inserted.

That is, two posts 13a standing along one outer edge of the lead frame 2A are arranged near both ends of the frame, and the posts 12a are placed on both the posts 13.
It is placed in the intermediate region of the frame restriction region by a and inserted into the hole.

Although not shown, one of the four posts 13a forming the detent member 13 may not be used, and the other three may be detent members 13.

7 to 9 show some of the main embodiments provided in accordance with the spirit of the invention.

FIG. 7 shows a plurality of posts 13a for contacting the ends of one outer edge of two opposing outer edges of an electronic component 2 represented by a lead frame 2A to prevent the frame from rotating. At the same time, a single post 12a that forms the above-described deviation preventing member 12 is arranged near the middle portion of the post 13a and near the middle portion of the other outer edge, and the frame 12A is positioned by the cooperation of both. ing.

FIG. 8 shows an embodiment in which the posts 12a forming the displacement preventing member 12 are inserted into the holes 8 formed in the left and right ears 9 near the middle portion of the lead frame 2A.

In this case, the posts 13a forming the anti-rotation member 13 are arranged at least near both ends of one outer edge of the frame according to the above embodiment, and both posts 13a are provided.
The post 12a is arranged in the region between them.

Further, in FIG. 9, the rotation preventing member 13 is formed by a restriction wall 13b extending along the outer edge of the electronic component 2 represented by the lead frame 2A.

The restriction wall 13b has a length for connecting the posts 13a in the embodiment shown in FIGS. 7 and 8, or a plurality of restriction walls are arranged separately.

It is needless to say that the present invention can be implemented by appropriately selecting the above-mentioned embodiments or combining them in an appropriate manner.

Further, the post 13a forming the rotation preventing member 13 is circumscribed on the linear portion of the outer edge of the electronic component 2 typified by the frame 2A, for example, aligned with the positioning notch hole provided on the outer edge. Absent.

When the posts 12a and 13a are formed in the shape of cylinders, the posts 12a and 13a abut on the straight portion of the outer edge of the frame at the generatrix of the cylinders.

The present invention includes the case where the lead frame 2A has a cutout portion on the outer edge thereof, and the detent member 13 is brought into contact with the straight portion of the cutout portion.

[0034]

According to the present invention, the detent member that abuts the outer edge of the electronic component cooperates with the anti-misalignment member that is inserted into the hole provided in the electronic component, and the electronic component such as the lead frame. It is possible to surely mount the socket at a fixed position.

The displacement prevention member to be inserted into the hole can be freely selected such that the insertion position is not limited to the both ends of the electronic component and can be inserted into the hole near the central portion. It is possible to effectively solve problems such as catching on the post at the time of attachment and detachment and deformation of the lead frame accompanying this. It is possible to insert the misalignment preventing member by selecting a hole that is not significantly affected by the manufacturing error of the lead frame and the warp at both ends.

Further, the present invention is effective as a positioning device when there is no hole in one of the ears of the electronic component, or when the punching pitch differs depending on the product, and the space for providing the hole is reduced to reduce the electronic component's size. Can be miniaturized.

[Brief description of drawings]

FIG. 1 is a plan view of an IC socket showing an embodiment of the present invention.

FIG. 2 is a side view of the socket in FIG.

[Figure 3]

FIG. 4 is a plan view of a lead frame.

FIG. 5 is a plan view showing a state in which a lead frame is mounted on the IC socket.

FIG. 6 is a side view of the socket in FIG.

FIG. 7 is a plan view showing another embodiment of the positioning device in the socket.

FIG. 8 is a plan view showing another embodiment of the positioning device in the socket.

FIG. 9 is a plan view showing another embodiment of the positioning device in the socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket board 2 Electronic component 2A Lead frame 3 Lead 4 Contact 8 Hole 12 Displacement prevention member 12a Displacement prevention post 13 Anti-rotation member 13a Anti-rotation post

Claims (4)

[Claims] 1. A positioning device for positioning and mounting an electronic component having a rectangular outer shape in a socket, which is inserted into a hole provided in an appropriate place of the rectangular electronic component in the socket to prevent lateral movement of the electronic component. A shift preventing member; and a detent member that comes into contact with at least one outer edge of the facing outer edges of the electronic component to prevent rotation of the electronic component about the shift preventing member. Positioning device for electronic components in a socket. 2. The anti-rotation member is formed by a plurality of posts spaced apart along one of the opposite outer edges and at least a single post arranged along the other outer edge. A positioning device for an electronic component in a socket according to claim 1. 3. A positioning device for an electronic component in a socket according to claim 1, wherein the shift preventing member is composed of a single post inserted into the hole. 4. The socket according to claim 1, wherein the shift preventing member is arranged in an intermediate region of a region where a rotation preventing member for controlling one outer edge of the electronic component acts. Positioning device for electronic parts.