JPS58135588A - Ic socket - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a socket for an integrated circuit mounting board (hereinafter referred to as an IC board).

ICs commonly referred to as flat IC packs
The base plate is flat and rectangular, and a plurality of groups of leads or conductive foil groups (hereinafter referred to as contact group), which are external terminals of the integrated circuit, are arranged in parallel on two to four sides of the periphery. By the way, a conventional IC socket has an IC accommodating space in the center of its base, and has a plurality of contact groups arranged in parallel according to the arrangement of the contact pieces on two to four sides around the IC accommodating space. A bulk contact method using an IC socket is adopted.

However, when an IC holding cover is pivotally supported at one end of these socket bases so that it can be opened and closed, and this is closed to the socket base against the elasticity of each contact piece group and each contact group, the cover is attached to at least each of the above two to four sides. A device with a wide area that can cover the entire surface of the contact group and each contact group arrangement area at the same time is required.
In order to maintain the closed state (IC holding state) of the C holding cover, when the free end of the cover is engaged with the lock lever provided on the other end of the base board under the force of each contact group and each contact group, the cover It is difficult to prevent warpage from occurring from the center to the proximal end, and it is difficult to avoid a decrease in contact reliability due to this.

Furthermore, even if the pitch of the contact group is the same, it is difficult to use the same socket for IC boards with a large number of pins or IC boards with different external dimensions, and it is necessary to prepare sockets for each type of IC, which is extremely expensive. It's the economy.

Therefore, in order to fundamentally solve such problems, the present invention has the following features:
The above-mentioned IC socket batch contact mechanism has been basically revised, and the IC
To provide an IC socket having a socket structure capable of individually contacting each group of contact pieces arranged on two to four sides of a base, and capable of holding an IC in each arrangement of contact piece groups in each direction. It is.

The drawings show one embodiment thereof, and the present invention will be described in detail below based on the same embodiment.

In the figure, 1 is an IC socket, and 2 is a base that constitutes the IC socket body.

The socket base 2 has a substantially rectangular shape and has a contact installation zone 3 on one side along its length.

The contact installation zone 3 is defined by recessing one side of the upper surface of the substrate 2 in a strip shape parallel to the longitudinal side surface of the substrate 2, and is connected to the contact piece group 6 of the IC substrate 5 accommodated in the zone 3. Leave the longitudinal and side surfaces open to avoid interference. The figure shows a case in which contact groups 6 are arranged in rows on two opposing sides of an IC board 5, respectively.

As shown in the figure, the IC
A contact group 4 corresponding to the contact group 6 on each side of the board is arranged in a row, and a plurality of groups of contact groups 6 of the IC board 5 described above are arranged in the zone 3.
The structure is such that only one contact piece group 6 arranged on one side of the contact pieces is received and contacted. Each contact group 6 may be arranged in a single row or in two rows staggered with respect to each other, and in this case, the contact groups 4 are arranged in a corresponding manner. Furthermore, the socket base 2 is provided on the other side with an IC holding cover 7 rotatably supported on an axis parallel to the row of the contact groups 4 and its lock lever 8.

As shown in the figure, the joints 9 are set up at intervals near both ends of the longitudinal edge of the base 2, and the joints 9 and the corresponding joints 10 extending toward the base end of the cover are aligned. The IC holding cover has a 70-turn joint. The illustrated example shows a case in which a similar rotary joint that supports the middle part of the cover is arranged in the rotary joint described in 11 above in order to stabilize the rotation.

The IC holding cover 7 is rotatable about the joint as a fulcrum to a closed position and a closed position relative to the area where the contact group is arranged.

On the other hand, the lock lever 8 is arranged in parallel within the rotation locus of the IC pressing cover 70. The base end of the lock lever 8 is
It is pivoted to the socket base 2 by a shaft 11 located between the rotation axis of the C holding cover 7 and the row of the contact group 4 and lower than the rotation axis of the IC holding cover 7, and this is used as a rotation fulcrum. The free end of the lock lever 8 is connected to the IC holding cover 7.
The height does not exceed the free end of the IC holding cover 7
When the cover is closed, the free end of the cover beyond the free end of the lock lever 8 presses on the row line of the contact group 4, more specifically, on the contact line between the contact group 4 and the contact piece group 4, that is, the IC.
Try to hold it down. In order to properly hold the IC, pads 15 corresponding to the rows of contact groups 4 are provided on the inner surface of the cover.

When the IC holding cover 7 is closed, the lock lever 8 rotates in the same direction as the closing direction of the cover, engages with the back surface of the cover, prevents the cover from rotating in the unclosing direction, and holds the IC holding cover. . The lock lever 8 has a metal plate 12 on the lug 1 protruded forward to perform the above-mentioned engagement, and snaps together with the protrusion 16 at the tip of the engagement finger 12 on the back of the cover. It has a matching groove 13.

In order to facilitate the engagement or disengagement operation, the free end of the lock lever 8 is provided with a finger hook 17 extending above the engagement finger 12.

By releasing the locking bar 8, the IC pressing cover 7 freely rotates in the direction of releasing the closing.

When the IC holding cover 7 is disengaged from the lock lever 8, the cover 7 is moved to a position corresponding to the lock lever 8 so that it can freely rotate between the closed position and the closed release position without interfering with the lock lever 8. A recess 14 is formed to allow the lock lever 8 to escape.

Since the IC holding cover 7 has a rotary joint connected to the socket base 2, the lock lever 8 is naturally provided at a position where it does not interfere with the rotary joint.

The illustrated embodiment shows a case in which two lock levers 8 are arranged in parallel at one end and intermediate rotational joint of the IC holding cover 7 and at the other end and intermediate rotational joint so as to have the same rotational axis.

The lock lever 8 is located within the rotation locus of the IC holding cover 7, and can be provided singly or in plural pieces.

The number of poles of the contact group 6 and the contact group 4 is increased, and the IC
Considering that the base plate 5 and the socket base plate 2 tend to be longer, it is preferable to divide the lock levers 8 into multiple pieces and arrange them in parallel in order to apply a uniform pressing force over the entire length. Also, a group of contacts 4 of the socket base 2
It is also possible to contact two or more groups of single contact pieces of each of the QIc substrates 5 in parallel. In this case, each IC board has one port. A clever 8 may also be provided.

For IC measurements (performance tests), etc., a socket is required to make contact with the group of contact pieces 6 arranged on each side of the IC board 5.4 In the present invention, the group of contact pieces 6 are arranged on two sides of the IC board 5 facing each other. 6, it is sufficient to use two sockets 1 that contact each contact group 6 individually. A pressing action can be applied to each contact group 6, and extremely stable contact with each contact group 4 can be maintained.

As a result, it is possible to effectively avoid warping of the IC holding cover and lack of contact reliability, which would occur in the conventional case where all groups of contact pieces are brought into contact with a single IC socket at once.

In addition, since the IC socket 1 is independent for each contact group 6 on the IC board 5, the pitch of the contact group 6 can be adjusted without being constrained by the IC housing space as in the case of conventional sockets of the batch contact method. As long as it is common, it can be used regardless of the size of the IC board 5, and it can also be used for IC boards with different numbers of contact group poles.

Furthermore, as described above, it is also possible for two or more IC boards to have each single contact piece group contacting the contact group in parallel. In particular, when the IC board has conductor foil or leads on two opposing sides, the number of poles increases, and if the IC socket 1 is constructed with a length that can be expected even if the length is increased, It has the advantage of being able to handle everything from short IC boards to long IC boards with one type of socket, and in both cases, each contact group and each contact group can be Pressurized contact is possible, maintaining a high level of contact reliability and measurement reliability.
Manufacturing is also extremely easy.

Furthermore, the present IC socket can also be applied to an IC board that originally only has a single row of contacts.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an IC socket according to an embodiment of the present invention, showing the cover in the open state, FIG. 2 is a perspective view of the IC socket, showing the cover in the closed state, and FIG. FIGS. 4A, B, and C are sectional views of the IC socket to explain the order of opening and closing the cover, and FIG. 5 is a sectional view of an example of how the IC socket is used. 1-IC socket, 2... Same board, 4... Contact group, 5... IC board, 6... Contact piece group, 7 ・IC
Holder cover, 8...Lock lever 8

Claims (2)

[Claims] (1) A contact group that contacts the contact piece group arranged on one side of the IC board is arranged on one side of the socket board, and an I
It is characterized by rotatably supporting an IC holding cover for holding down C, and rotatably supporting a lock lever that is arranged in the rotation locus of the IC holding cover and keeps the IC holding cover in the closed position. IC socket. (2) The invention as set forth in item 1, wherein two or more of the lock levers are arranged in parallel within the rotation locus of the IC holding cover.