JP3276036B2 - Socket with latch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latched socket for receiving a daughter board and interconnecting it with a parent board.

[0002]

2. Description of the Related Art In the field of personal computers and the like,
Sockets are frequently used to connect a child board on which a memory module is mounted to a parent board. This type of socket has a zero insertion force (ZIF) to facilitate mounting of the child board.
It is often a type socket. That is, the daughter board is inserted into the socket from a direction inclined with respect to the socket, and the daughter board is rotated by a predetermined angle so that both ends of the daughter board are engaged with the latches, whereby the daughter board is interconnected with the master board. The latch is preferably made of metal in consideration of wear resistance.
FIG. 5 is a plan view showing an example of such a socket having a metal latch (Japanese Patent Application Laid-Open No. H5-211076).

The illustrated latch 100 is housed in a slot 112 at the longitudinal end of a socket housing 110. When the child board 120 obliquely inserted into the housing 110 is rotated upward in the figure, the child board 1
The side end 122 of the latch 20 engages the protrusion 102 of the latch 100 to displace the latch 100 to the left as shown. As the child board 120 continues to rotate, the side end 122 of the child board 120 is locked by the locking portion 104 of the latch 100, and the child board 120 is held at that position.

[0004] The latch 100 has a flat portion 106 formed continuously with the locking portion 104, and can be brought into contact with the post portion 114 of the housing 110. For this reason, even if the daughter board 120 is pressed downward in the figure after being locked by the locking portion 104, the latch 100 does not move downward in the figure due to the engagement of the flat portion 106 and the post portion 114.

[Problems to be solved by the invention]

However, the upper surface of the flat portion 106 is not supported by the housing 110. Therefore, when the daughter board 120 is inserted into the housing 110, the latch 100 moves upward in the drawing due to the frictional engagement between the protrusion 102 of the latch 100 and the side end 122 of the daughter board 120, and the latch 100 is locked. The part 104 is the child substrate 12
There is a possibility that it does not lock at zero. In particular, in the case of a socket for receiving a child board on which a recent ultra-small memory module is mounted, the elasticity of the latch is extremely reduced with the miniaturization of the latch, which is one of the components constituting the socket. There is a problem that the situation where the portion does not lock to the sub-board frequently occurs.

Accordingly, an object of the present invention is to provide a socket with a latch that solves the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION A latch-equipped socket according to the present invention is a socket for interconnecting a parent substrate and a child substrate, the latch having a metal latch for engaging at least one of both ends of the child substrate. In the socket with a hole, the latch includes an elastically displaceable beam, and one end of the beam.
Locking portion provided on the side for locking the daughter board; and the locking portion
And has a surface inclined with respect to the locking portion.
An operation portion, and a position facing the locking portion with the beam portion interposed therebetween
And a tongue extending horizontally.
Further, a slot is formed in the housing of the socket so as to sandwich the tongue, thereby restricting the movement of the latch in the insertion / removal direction of the daughter board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a socket with a latch according to the present invention, in which (A) is a plan view, (B) is a front view, and (C).
It is a side view. 2A and 2B show a housing of the socket of FIG. 1, wherein FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 3A and 3B show the latch of the socket of FIG. 1, and are (A) a plan view, (B), a view (B) of (A), and (C) (A) a view of C. However, a part is omitted in (B).
FIG. 4 is a partially enlarged view of a portion IV in FIG.

In FIG. 1 and FIG. 2, a socket 1 is provided at a substantially U-shaped insulating housing 10 in plan view, contacts 30 arranged in two rows in the housing 10, and both ends of the housing 10. Latch 40.
The housing 10 includes a base 12 for holding the contacts 30.
And a pair of arms 14 extending from both ends of the base 12 at right angles. Inside the base 12, a concave portion 16 is formed along the longitudinal direction of the base 12 for receiving the insertion tip of the daughter board (not shown). Two rows of contacts 30
The contact portions (not shown) project from above and below the concave portion 16 into the concave portion 16 and can contact the daughter board. In addition, the connection portion 32 of the contact 30 is soldered to a mother board (not shown). An accommodation chamber 18 for accommodating the latch 40 is formed at the tip of the arm 14. The arm 14 is provided with a protrusion 20 along its longitudinal direction, and a slot 22 is formed at the tip of the protrusion 20.
Latch 4 housed at each end of housing 10
Since 0s are mirror images of each other, only the left latch 40 will be described below.

In FIG. 3, one metal latch 40 is shown.
Has first and second beam portions 42 and 44 formed by being bent in a substantially V shape. Of these, the first beam portion 42 is provided with a barb (projection) 46 on an upper side thereof, and the barb 46 interferes with the inner wall of the housing chamber 18 of the housing 10 to enter the housing chamber 18. Fixed. At the end of the first beam portion 42, a fixing tab 48 for soldering and fixing to a parent board (not shown) is provided. Second
Since the beam portion 44 does not interfere with the inner wall of the accommodation room 18, the first
3B can be elastically displaced in the left-right direction of FIG. A locking portion 50 for locking the daughter board and an operating portion 5 continuous with the locking portion 50 are provided on the distal end side of the second beam portion 44.
2 are provided. Further, a protrusion 54 is provided adjacent to the locking portion 50. The projection 54 is formed in an arc shape corresponding to a semicircular notch (not shown) at the side end of the daughter board. A tongue piece 56 is formed at a position facing the locking portion 50 with the second beam portion 44 interposed therebetween.

Referring to FIG. 4, the tongue piece 56 is
The protrusions 20 are accommodated in the slots 22 and restrict the movement of the second beam 44 in the vertical direction in the drawing, that is, in the insertion / removal direction of the child board. Generally, in a ZIF-type socket, the daughter board is urged away from the final fitting position by a contact or the like. In the case of the socket 1, the daughter board may be lifted because it is urged upward in the drawing, but the latch 40 is prevented from being lifted by the contact between the tongue piece 56 and the upper wall of the slot 22. In addition, the latch 40 does not lower when the child board is inserted due to the contact between the tongue piece 56 and the lower wall of the slot 22, so that the child board is
This eliminates the situation of not engaging. Since the tongue piece 56 is formed at a position substantially overlapping with the locking portion 50 in a plan view, the position of the locking portion 50 can be controlled with high accuracy.

While the embodiment of the socket with a latch according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be modified and changed as needed.

[0013]

According to the present invention, by restricting the movement of the latch, the latch and the sub-board are securely engaged when the sub-board is inserted, and the latch is prevented from floating when the sub-board is completely fitted. Has the effect of doing

[Brief description of the drawings]

FIG. 1 shows one embodiment of a socket with a latch of the present invention, and is (A) a plan view, (B) a front view, and (C) a side view.

FIGS. 2A and 2B show a housing of the socket of FIG. 1, and are a plan view, a front view, and a side view, respectively.

FIGS. 3A and 3B show the latch of the socket of FIG. 1, and are (A) a plan view, (B), a view (B) of (A), and (C) (C) of (A).

FIG. 4 is a partially enlarged view of a portion IV in FIG. 1;

FIG. 5 is a plan view showing a conventional socket with a latch together with a daughter board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 22 Slot 40 Latch 50 Locking part 56 Tongue piece

Claims (1)

(57) [Claims] 1. A socket for interconnecting a parent board and a child board, the socket having a latch having a metal latch for locking at least one of both ends of the child board, wherein the latch is elastically displaceable. A beam and a tip of the beam
A locking portion provided on one side for locking the daughter board;
Has a surface that is continuous with the part and that is inclined with respect to the locking part.
Operating portion, and a position facing the locking portion with the beam portion interposed therebetween.
And a tongue extending in the horizontal direction.
A socket with a latch , wherein a slot for sandwiching the tongue piece is formed in a housing of the socket to limit movement of the latch in a direction in which the daughter board is inserted and removed.