JP2503063Y2 - Board twisting prevention structure for board connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a board twist prevention structure for a connector for a small board having a very small pitch such as a memory module.

<< Prior Art >> A board connector a is generally composed of a housing b formed by injection molding an insulating material such as a synthetic resin and a contact pin c arranged in the housing b as shown in FIG. The housing c is provided with a groove portion f into which the edge portion e of the substrate d is inserted, and guide groove portions g for facilitating the insertion of the substrate d are formed on the left and right sides thereof, and the middle portion and the end portion excluding the center of the groove portion f. Ribs h and i are provided on the part,
The edge portion e of the substrate d is provided with insertion concave portions j and k into which the ribs h and i are inserted when the edge portion e is normally inserted.

Then, the board d is inserted into the groove f of the board connector a on the side of the edge e, and the insertion recesses j and k are inserted.
Ribs h and i are inserted into the connector and mounted on the board connector a, and the conductive strip m is brought into contact with the contact pin c.

<< Problems to be Solved by the Invention >> However, when the board d is pulled out from the state where the board d is inserted into the groove portion f of the board connector a, the board d inevitably swings. For this reason, the one left end of the board d rotates about the rotation center O where the guide portion n of the board connector a interferes. Therefore, when the corner portion of the opening released to the edge portion e of the insertion concave portion k is defined as the point P, the locus a around the rotation center O of the point P is as shown in FIG. P interferes with the rib i,
There was a problem of twisting.

The present invention has been made in view of the above problems, and an object thereof is to take out a corner when a substrate is pulled out from a groove portion when the substrate is pulled out from a groove portion. It is an object of the present invention to provide a board twisting prevention structure of a board connector which prevents twisting without the point P of the portion interfering with the rib.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention provides a groove provided in a board connector into which an edge portion of a board is inserted, and an intermediate portion and an end excluding the center of the groove portion. A rib is provided on the board portion, and an insertion recess into which the rib is inserted at the time of normal insertion is provided on the edge portion of the board, and one side end portion of the board interferes with the board connector when the board is pulled out from the board connector. When the point is the center of rotation O of the substrate, the point P of the corner of the opening released to the edge of the insertion recess on the end side.
The ribs are located outside the locus (a) about the center of rotation O.

<< Operation >> When the substrate is pulled out from the groove portion, the point P of the corner portion does not interfere with the ribs when the substrate is pulled out from the rotation center O, so that the substrate is not twisted. Does not occur.

<< Embodiment >> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a state of a board having a board twisting prevention structure according to the present invention before being attached to a board connector,
Fig. 2 is a plan view of the board connector, and Fig. 3 is Fig. 2A-.
FIG. 4 is a front view of the lock mechanism, FIG. 5 is a view from the direction of FIG. 4B, and FIG. 6 is FIG. 3C-
FIG. 7 is a sectional view taken along line C, FIG. 7 is a front view of the substrate, and FIG. 8 is a behavior explanatory diagram when the substrate is extracted.

The board connector 1 is generally composed of a housing 2 formed by injection molding an insulating material such as a synthetic resin and a contact pin 3 arranged in the housing 2. The housing 2 has an edge portion 5 of a board 4. A groove portion 6 to be inserted is provided, and guide groove portions 7 that facilitate insertion of the substrate 4 are formed on the left and right sides thereof. A lock mechanism 8 is provided on the left and right of the groove 6 of the housing 2. As shown in FIG. 4 and FIG. 5, the locking mechanism 8 has a base portion connected to a lower portion of the housing groove 10 in an accommodation groove 10 formed in both side wall portions 9 of the groove portion 6 and is directed upward. The lock pieces (11) having a raised spring property are provided, and the engaging projections (12) are provided on the upper portions of the facing surfaces of these lock pieces (11). Further, in the groove portion 6,
Ribs 14 and 15 for preventing reverse insertion of the substrate 13 are provided. That is, one rib 14 is located closer to the left end of the groove 6, and the other rib 15 is located closer to the right than the center of the groove 6.

The contact pins 3 are arranged in the groove 6 so as to face each other along the side wall 9.

A large number of the board connectors 1 configured as described above are mounted on a board (not shown) at a small pitch interval of about 10 mm.

The board 4 includes a board body 16 having an IC mounting area 16a as shown in FIG. 7, and the edge portion 5 which is an insertion side edge portion of the board body 16 contacts the contact pin 3 at the time of insertion. A large number of conductive strips 18 are arranged along the left-right direction. In addition, the edge portion 5 of the substrate body 16
The recesses 17 and 19 for insertion into which the ribs 14 and 15 are inserted at the time of normal insertion are provided in the. That is, one insertion recess 17
Is located closer to the left end of the substrate body 16, the other insertion recess 19 is located closer to the right than the center of the edge portion 5, and one insertion recess 17 is located in the other insertion recess 19. It is made wider in comparison.

The relationship between the insertion recess 17 and the rib 14 is that the left end of the board 4 guides the board connector 1 when the board 1 is pulled out from the state where the board 4 is inserted in the groove 6 of the board connector 1. When a point that interferes with the bottom 7a of the groove 7 is the center of rotation O of the substrate and a corner of the opening 17a that is released to the edge 5 of the insertion recess 17 is point P, the center of rotation O of this point P is the center of rotation. The locus i is as shown in FIG. 8, and the rib 14 is located outside the locus a.

Further, lock holes 20 and 21 are formed on the left and right of the edge portion 5 of the substrate body 16. And the connector mounting area 16
ICs (not shown) are attached to both sides of the substrate body 16 at a.

 Next, the operation will be described.

The board 4 configured as described above is attached to the board connector 1 by inserting the edge portion 5 side into the groove 6 of the board connector 1. In this case, the engaging projection 12 of the lock mechanism 8 engages with the lock holes 20 and 21 of the substrate 4 and the insertion recess
Ribs 14, 15 are inserted in 17, 19 so that the conductive strip 18 contacts the contact pins 22.

When the corner portion of the opening 17a released to the edge portion 5 of the insertion recess 17 on the left end side is set to point P, this point P
When the substrate 4 is pulled out from the groove portion 6 because the ribs 14 are located outside the locus a around the rotation center O of the substrate 4,
8 rotates about its rotation center O, the locus a of the point P of the corner portion becomes as shown in FIG. 8, and the point P does not interfere with the rib 14 and twists. Does not happen.

As shown in FIG. 9, the shape of the insertion recess 17 may be such that the corner portion of the opening 17a that opens to the edge portion 5 is chamfered (the chamfered portion is indicated by C). As shown in the drawing, the left side portion 17b of the insertion recess 17 may be inclined.

In the case of the insertion recess 17 in which the corner portion of the opening 17a released to the edge portion 5 is chamfered (the chamfered portion is indicated by C), the locus a of the point P of the corner portion is substantially the same as in FIG. This point P does not interfere with the rib 14 and does not twist.

It should be noted that FIG. 11 shows the twisting relationship between the insertion recess 19 and the rib 15, and in this case no twisting occurs.

<< Advantages of the Invention >> As described above, according to the present invention, ribs are provided in the groove portion provided in the board connector and into which the edge portion of the board is inserted, in the middle portion and the end portion excluding the center of the groove portion. At the edge portion of the, provided with an insertion recess into which the rib is inserted at the time of normal insertion, when pulling out the board from the board connector,
The point at which one side end of this board interferes with the board connector is taken as the rotation center O of the board, and the rotation center O at the point P of the corner of the opening released to the edge of the insertion recess on the end side is taken as the rotation center O. Since the ribs are located outside the center locus (a), when the substrate is pulled out from the groove portion, when the substrate is rotated about its rotation center O, the point P of the corner portion is formed.
8 is as shown in FIG. 8, and this point P does not interfere with the ribs and no prying occurs.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state of a board having a board twisting prevention structure according to the present invention before being attached to the board connector, FIG. 2 is a plan view of the board connector, and FIG. 3 is FIG. 2A. -A
FIG. 4 is a front view of the locking mechanism, and FIG.
FIG. 4 is a view from the direction of FIG. 4B, and FIG. 6 is FIG. 3C-C.
Sectional drawing along the line, FIG. 7 is a front view of the substrate, FIG. 8 is an explanatory view of the behavior at the time of extracting the substrate, and FIGS. 9 and 10 are description of other embodiments of recesses for insertion of different substrates. 11 and 12 are explanatory views of the behavior when the board having the insertion recess shown in FIG. 9 is taken out, FIG. 12 is a front view in which the board and the board connector are partially omitted, and FIG. It is a behavior explanatory view at the time of extraction of the substrate when it occurs. 1 ... Board connector, 2 ... Housing, 4 ... Board, 5 ... Edge part, 6 ... Groove part, 7 ... Guide groove part, 14, 15 ... Rib, 17,
19… Recess for insertion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Morio Suzuki, 1 Horiyamashita, Hadano-shi, Kanagawa Hitachi, Ltd. Kanagawa factory (72) Inventor Hiroshi Kosai 1st, Horiyamashita, Hadano, Kanagawa Hitachi, Ltd. Kanagawa factory Within

Claims (1)

(57) [Scope of utility model registration request] 1. Ribs are provided in a groove portion provided in a board connector into which an edge portion of the board is inserted, and ribs are provided at an intermediate portion and an end portion excluding the center of the groove portion. When the board is pulled out from the board connector, a point where one side edge of the board interferes with the board connector is defined as the rotation center O of the board. A board twisting prevention structure for a board connector, wherein a rib is located outside a locus (a) around a rotation center O of a point P of a corner of an opening released to the edge of the recess.