JPH04155790A - Socket - Google Patents

Abstract

PURPOSE:To make contact pressure enough and uniform, miniaturize and automate attaching and detaching of a socket by displacing a contact or and a fixed member, as interlocking with the forward motion of a reciprocating member, so as to insert an electric part in a socket main body, and making fixing and electrical connection in backward motion there of. CONSTITUTION:When the cover member 30 of a socket main body 21 is moved down from a normal state by external force, the sliding contact part 20 of a contact or 24 moves, while sliding on an inclined face 32, so as to detach a contact point 24a from a lead 5. When the member 30 is moved down further, its bottom end makes the protrusion part 42 of a fixed member 40 turn around a pushing pin 43 as fulcrum against a spring 45 so as to bring the member 40 in an opened state. Then IC package 2 is attached to and detached from a preset position of the main body 21 through the through-hole 31 of the member 30. By releasing the pushing down force of the member 30, the member 40 and the contactor 24 return to the original positions by respective restoring forces, and the contact point 24a is abutted from below under fixed pressure on the lead 5 being located under the member 40.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention is useful when inserting and attaching a predetermined electrical component, particularly an IC package in which a semiconductor integrated circuit chip (hereinafter referred to as an IC chip) is molded. The present invention relates to a socket having a contact that can be elastically pressed against an electrical component to bring it into electrical contact, such as a socket for IC chip testing.

BACKGROUND OF THE INVENTION In recent years, IC packages have become thinner and smaller, and are increasingly being used for surface mounting. However, on the other hand, as ICs become thinner and smaller, the quality of the products becomes less stable, so the process of inspecting and removing products that are defective or have elements that may become defective plays an important role.

In particular, in order to inspect IC packages such as highly integrated surface-mount ICs (for example, heat resistance tests called burn-in tests), IC packages are placed in a heating furnace to determine whether they are good or bad. A determination is being made.

As sockets for mounting IC packages used in such tests, sockets as shown in FIGS. 5 and 6 are used.

The base 1 of the socket shown in FIG.
4 is fixed, and by placing the lead 5 of the IC package 2 on the contact 4a of the contact 4 and pressing the cover member 6 from above, contact pressure between the lead 5 and the contact 4 is ensured. ing. In this case, although not shown, the cover member 6 is pressed and held from above by a locking member called a latch. However, the method of pressing the ICIJ-de 5 against the contactor 4 as described above has the following drawbacks.

(1) It is difficult to apply a constant force to each IC lead by the cover member 6, which may cause the leads to become irregularly arranged or bent. That is, the cover member 6 can be rotated around a fulcrum (not shown, but located on the left side of FIG. 5) as shown by the dashed line, and is rotated to the solid line position and locked there. The lead 5 of the IC package 2 is also provided at a left position (not shown) and is similarly pressed by the cover member 6, but at this time, the lead 5 of the IC package 2 is placed on the side closer to the pivot point (left position). The pressing force at the solid line position (right position) is inevitably larger than the pressing force at the solid line position (right position), and the pressing force itself of the cover member 6 also varies among the leads. For this reason, the leads may be bent at locations where the pressing force is large, and the leads may be unevenly arranged at locations where the pushing force is small and uneven.

This causes problems such as poor contact and failure to solder the leads of the IC product to the printed circuit board.

(2) Since the lead 5 is pressed by the cover member 6, the IC cannot be removed unless the cover member 6 is removed, that is, it is difficult to automate.

(3) The socket becomes thicker due to the cover member 6.
In addition to not increasing the packaging density, since the cover member 6 covers the IC, it is difficult for the temperature to rise during testing.

According to the socket shown in FIG. 6, the pressing member 9 is lowered to press the protrusion 10 of the contact 4. As a result, the contact 4 is elastically deformed in the direction of arrow 11, and the contact 4a is opened outward. In this state, each lead 5 of the IC package 2 is inserted into the guide groove 8 of the base 1 from above and its slope is lowered, and after positioning the IC package 2 by the protrusion 7 provided at the position shown in the figure, the pressing member 9 By removing the pressing force, the contact 4 is elastically moved back to the original position and the contact 4a is pressed against the lead 5. However, this contact method cannot avoid the following drawbacks.

(1) The IC package 2 must be accurately positioned on the base 1, and if there is any misalignment, the contact pressure from the contacts 4 will be uneven, resulting in poor contact or excessive contact pressure. Put it away.

(2) Therefore, in order to obtain a predetermined contact pressure, the distance between the protrusion 7 and the contact 4a must correspond to the length and shape of the lead 5, and one type of IC must correspond to one type of socket.
Only packages can be applied. For this reason, one type of socket cannot respond to various changes in lead length depending on user requirements.

The purpose of the present invention is to provide sufficient and uniform contact pressure, to be miniaturized, to enable easy attachment and detachment of IC chips and other electrical components using automatic machines, and to be able to handle various lead lengths and The purpose is to provide sockets that can be shared in different shapes.

20 Structure of the Invention That is, the present invention provides a contact that is electrically connected to a connecting terminal portion of a predetermined electrical component to be attached in an elastically pressed state, and a contact that is electrically connected to the connecting terminal portion of the electrical component. It has a fixing member that is held between the contactor and a reciprocating member that is provided to be able to reciprocate with respect to the socket body, and the contactor and the fixing member are interlocked with the forward movement of the reciprocating member. The electrical component is inserted into the socket body by displacing the member from its original position, and the fixing member and the contact are returned to their original positions to connect the connecting terminal portion of the electrical component to the fixing member. The present invention relates to a socket configured to be held between the contactor and to electrically connect the connection terminal portion to the contactor and further to cause the reciprocating member to move back.

In addition, in the above, r furthermore, the reciprocating movement of the reciprocating member.
``Furthermore'' means that the same return movement is performed at the same time as the fixing of the electric component, and also the case where the same return movement is performed successively after the same fixation.

E, Example The present invention will be explained in detail below.

1 to 4 show a socket for IC chip testing (burn-in testing) according to this embodiment.

That is, the contact 24 is entirely formed of a pin-shaped conductive material, and has a fixed end 24b that is connected to the base 21, which is the socket body, and a fully arcuate shape that is connected to the fixed end 24b. It consists of a bent elastic bent part 23, and a sliding contact part 20 and a contact point 24a connected to the bent end of this bent part 23.

Lead 5 of IC package 2 with molded IC chip
A fixing member 4 that clamps and fixes to the contact point of the contactor 24
0 is a fixing lever part 4 that stands upright from a fulcrum pin 43 (rotation center) fixed to the socket body 21 and has a substantially U-shape.
1 (see FIG. 4), a continuous portion 44 that is continuous in a direction perpendicular to this fixing lever portion 41, and this continuous portion 44.
It consists of a protruding part 42 which is provided to protrude upward from. A coil spring 45 is disposed in a recess (not shown) formed in the socket body 21, and the fixing member 40
The upper end of a spring 45 is in contact with the lower end of the connecting portion 44 . Further, the continuous portion 44 of the fixing member 40 is disposed within the groove 27 provided in the base 1.

The cover member (reciprocating member) 30 is provided with a groove 34 into which the sliding contact portion 20 of the contact 24 is inserted.
4 is provided with an inclined surface 32 (sliding surface of the sliding contact portion 20).

Next, the operation of mounting the IC package 2 onto the socket body 21 will be explained.

That is, as shown in FIG. 2, first, the cover member 30 attached to a predetermined position of the socket body 21 is moved from the position shown in FIG. At this time, the sliding portion 20 of the contact 24 moves clockwise while sliding on the inclined surface 32. At the same time, contact 24a also moves in the same direction and separates from lead 5 (contact open)
.

During this movement, a certain amount of force is required to elastically deform the contactor 24, but due to the above-described shape, such a large force is not required. When the cover member 30 is further moved downward, the lower end of the cover member 30 is moved toward the fixing member 40.
comes into contact with the protrusion 42 of. Then, the cover member 30
By moving the pin 4 downward in the direction of the arrow 38, the protrusion 42 is pressed downward by the cover member 30, and the pin 4
3 as a fulcrum, the fixing lever 41 (fixing member 40) rotates clockwise while resisting the spring force of the spring 45.
1 opens). Then, by further pushing down the cover member 30 until it contacts the socket body 21, the fixing member 40 (lever 41) is kept fully open (full stroke) as shown in FIG.

Next, with the fixing member 40 (lever 41) fully opened as described above, the IC package 2 is inserted through the through hole 31 of the cover member 30 as shown in FIG. Insert the IC package 2 into a predetermined position. At this time, the package 2 is positioned by the protrusion 7 provided on the main body 21.

Thereafter, by releasing the force (external force) that pushes down the cover member 30, the fixing member 40 and the contactor 24 are moved in the opposite direction to the above-mentioned direction (the direction in which they return to their original positions).
Furthermore, the cover member 30 moves. That is, the fixed lever 41 is rotated counterclockwise by the restoring force of the compressed spring 45 and returned to its original position, and the state shown in FIG. ), and the elastic restoring force acting on the sliding contact portion 20 of the contact 24 also acts to push the cover 30 back to its original position (moves back).
is also pushed back toward the original position, and the contact point 24a is already in contact with the lead 5 existing under the foot member 40 from one side,
As shown in FIG.
It will be in a state where it is held between 2 and a.

In addition, to remove the IC package 2, perform the operation opposite to that described above. It has become.

(1) Due to the external force (push-down force) of the cover member 30, the contactor 242 and the fixing member 40 are moved in conjunction with the downward movement (forward movement) of the cover member 30.
The IC/package 2 is inserted into the socket body 21 by displacing it from its original position, and then the fixing member 40 and the contact 2 are inserted into the socket body 21.
4 to their original positions and insert the IC into the socket main body 21.
Fixing the package 2 (specifically, clamping the lead 5),
Furthermore, since the cover member 30 is configured to move (slide) toward the original position, the contacts 24a are moved after the IC package 2 is fixed, instead of pressing the leads 5 against the contacts 24a. It would rise with its own blade and contact Lead 5 from below. Therefore, which lead 5
Since the leads are brought into contact with the same contact pressure, there is little variation in the contact pressure between the leads 5, and sufficient contact pressure can be obtained. Therefore, bending or irregularity of the leads does not occur.

(2) Basically, the IC package 2 can be fixed to the socket body 21 by a very simple movement of the cover member 30 by reciprocating movement (up and down movement in this example). Therefore, there is no need to perform complicated operations, and the IC package 2 can be easily removably attached and fixed to the socket body 21' even with an automatic machine, which is very advantageous for promoting automation.

In addition, since the structure is not such that the lead is fastened to the i with a cover member as in the conventional case, automation and miniaturization of the socket are facilitated.

゛(3) Since the structure is such that the lead 5 is held between the top and bottom,
Even if the lead length changes or differs, the lead only extends outward from the clamping position (when the lead length is large), and the lead can always be reliably clamped at a predetermined position. Therefore, the length (and even shape) of the lead
Regardless of the situation, it is possible to securely clamp the IC package with the specified contact pressure at all times, and one type of socket can be used for multiple types of IC packages, and the shipping period to the user can be significantly shortened. .

Although the present invention has been illustrated above, the embodiments described above can be further modified according to the technical idea of the present invention.

For example, the shape, material, mounting position, etc. of the contacts and fixing members mentioned above may be changed in various ways, and the shape, material, structure, and angle of the inclined surface of the cover member (reciprocating member) may also be changed. good. In addition, the material, shape, structure, etc. of the socket body may be appropriately selected. Alternatively, the IC package may be attached to the carrier and then attached to the socket.

Further, in the above example, the IC chip, etc. is inserted into the socket body and fixed by displacing the cover member in the vertical direction, but it is not necessarily necessary to displace the cover member in the vertical direction. This can also be done by displacement. The fixing of the IC chip and the return of the cover member to the original position may be delayed or simultaneous, and the shape and attachment of the spring provided between the fixing member and the socket body may be different. The method, type, etc. may be changed.

Note that the present invention can of course be applied to electrical components other than the above-mentioned IC chip.

B1 Functions and Effects of the Invention As described above, the present invention displaces the contact and the fixing member from their original positions in conjunction with the forward movement of the reciprocating member, inserts the electrical component into the socket body, and fixes the electrical component as described above. The member and the contactor are each returned to their original positions, and the electrical component is fixed to the socket body (clamping the connection terminal portion), and the return movement of the reciprocating member is also clamped between the member and the contactor. Therefore,
Since contact is made with the same contact pressure to all the connecting terminal parts, there is little variation in contact pressure between the connecting terminal parts, and sufficient contact pressure can be obtained.

Further, the fixing operation of electrical parts can be easily performed with only a simple reciprocating motion without requiring complicated motions, and automation with an automatic machine or the like is also facilitated. Furthermore, since the socket has a reciprocating structure using reciprocating members, the socket itself can be made smaller.

Furthermore, since the structure is such that the connection terminal portion is held in place, even if the length thereof changes or differs, it can always be held securely in a predetermined position. Therefore, irrespective of the length (and shape) of the connecting terminal portion, it is always possible to securely clamp the socket with a predetermined contact pressure, and one type of socket can be used in common for multiple types of electrical components.

[Brief explanation of the drawing]

Figures 1 to 4 show embodiments of the present invention. Figure 1 is a cross-sectional view of main parts of a socket according to an embodiment of the present invention in a normal state, and Figure 2 is a contact open state of the socket. FIG. 3 is a cross-sectional view of the main part of the socket at full stroke, and FIG. 4 is an exploded perspective view of the socket. FIGS. 5 and 6 are sectional views of the main parts of a conventional socket. In addition, in the symbols shown in the drawings, 2......IC package 5...Lead 20...Sliding contact portion 21... ...Socket body (base) 24.
......Contact 24a...Contact 30...Cover member 40...Fixing member 42... . . . Protrusion 43 . . . Pin 45 . . . Spring. Agent Patent Attorney Renkan My youngest brother 1 is in normal condition. Fig. 2 When the contact is open Fig. 3 Full stroke tlI life Fig. 4

Claims (1)

[Claims] 1. A contact element that is electrically connected to a connecting terminal part of a predetermined electrical component to be mounted in an elastically pressed state, and the connecting terminal part of the electrical component is sandwiched between the contact element. It has a fixing member and a reciprocating member that is provided to be able to reciprocate with respect to the socket body, and in conjunction with the forward movement of the reciprocating member, the contactor and the fixing member are displaced from their original positions. inserting an electrical component into the socket body, returning the fixing member and the contact to their original positions, and sandwiching the connection terminal portion of the electrical component between the fixing member and the contact; A socket configured to electrically connect the connection terminal portion to the contactor and further move the reciprocating member back.