JP2752024B2 - Printed circuit board connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for a printed circuit board, and more particularly, to a connector having an improved flange for fixing to a printed circuit board.

[0002]

2. Description of the Related Art As shown in FIG. 10, for example, a conventional connector for a printed circuit board is formed on outer walls 2, 2 'on both sides of a connector housing 1 comprising a box-shaped enclosure wall.
It has flanges 3, 3 'for fixing to a printed circuit board.

The fixing flanges 3 and 3 'are formed with screw holes 5 and 5' for inserting fixing screws 4, but usually, in order to simplify the manufacturing process and reduce costs. As shown in FIG. 11, the slits 6a, 6a are formed on one of the fixing flanges 3 by providing slits in combination with a mold for molding the connector housing and forming the slits.
A screw hole 5 formed by superimposing b and 6c is formed. That is, on the upper and lower surfaces of the flange 3,
Slit grooves 6a and 6c each having an open end are provided on one side surface of the flange 3 from the screw hole 5, and a thin portion 7 is left between the slit grooves 6a and 6c. The screw hole 5 is formed by providing a slit groove 6b opening on the other side surface of the flange 3 so as to match the grooves 6a and 6c. A screw hole 5 'is similarly formed in the other fixing flange 3'.

However, when the screw hole 5 is formed by this method, a thin portion 7 having a thickness corresponding to the interval between the slit grooves 6a and 6c is formed on the flange 3, and
Also on the other side flange 3 ′, the thin portion 7 of the flange 3
A thin portion 7 'is formed at a position in the same direction as.

In order to fix such a connector to a printed circuit board, as shown in FIGS. 12 and 13, a screw 4 is inserted into a screw hole 5 of a flange 3 and tightened. A force F in a direction away from the outer wall 2 is generated in the thin portion 7 according to the rotation direction of the screw 4 indicated by the arrow R due to friction with the surroundings. At this time, the thin portion 7
The pulling force by the force F acts, and the thin portion 7
When the tensile strength exceeds the limit of the tensile strength, the thin portion 7 has a crack and the flange 3 is damaged.

On the other hand, with respect to the screw hole 5 of the flange 3 ',
When the tightening is performed using the same screw 4, the rotation direction is the same direction R as that of the flange 3, so that the direction of the force F generated according to the rotation of the screw 4 is the direction toward the outer wall 2 ', and The portion 7 ′ becomes a compressive force and does not become a tensile force.
Is not damaged.

Therefore, in order to prevent the flange 3 from being damaged, it is necessary to use a right-hand screw and a left-hand screw having different fastening directions for the screw 4 for fixing the connector as described above. There is a problem that the fixing work cannot be actually performed because the fixing work does not exist.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. In order to fix a connector to a printed circuit board, a flange for preventing damage to the flange when tightening with a screw is used. It is an object to provide a printed circuit board connector provided with the same.

[0009]

In order to achieve the above object, the present invention provides a connector housing having a screw hole on an outer wall thereof.
A fixing flange for fixing the screw is provided on both sides of the flange.
A first switch having an open end on one side of the flange from the hole.
A first slot into the first slot, a third slit slot, and the screw hole.
Slot and the third slit groove, and
In a printed circuit board connector provided with a second slit groove that opens on one side, the first slit groove and the second slit groove
The thin portion connecting the three slit grooves is provided at a position where the force due to the rotation of the fixing screw when tightening is directed to the outer wall of the connector housing through the thin portion.

[0010]

[0011]

According to the first aspect of the present invention, the thin-walled portion forming the screw hole provided in the fixing flange is positioned at a position where the force caused by the rotation of the screw at the time of tightening is directed to the outer wall of the connector housing through the thin-walled portion. , The tightening force acts as a compressive force on the thin-walled part, and no tensile force is applied.Therefore, there is no crack in the thin-walled part, and tightening is performed on each fixing flange. Even if the screw is tightened using a screw whose direction is right, the fixing work of the connector can be performed quickly and smoothly without damaging the flange.

[0012]

[0013]

1 is a plan view of a printed circuit board connector 8 according to an embodiment of the present invention. The printed circuit board connector 8 has fixing flanges (hereinafter simply referred to as flanges) 10 and 10 ′ protruding from opposed outer walls 9 a and 9 a ′ of a connector housing 9 formed of a cylindrical enclosure wall. Is provided with a terminal fixing portion 9b having a plurality of terminals 11 embedded therein.

As shown in a cross section in FIG. 2A, one flange 10 has a slit groove 1 formed in the same direction.
A screw hole 13 for fixing is formed by overlapping a slit groove 12b formed in the opposite direction between 2a and 12c. FIG. 2 also shows the other flange 10 '.
As shown in the cross section in (2), the slit grooves 12a ', 12
The screw holes 13 ′ are formed by stacking b ′ and 12 c ′, but the direction in which the slit grooves are formed is directed in the opposite direction to the flange 10. That is, the flange 1
0, a thin portion 14 connecting the slit grooves 12a and 12c is formed on the opposite side of the terminal fixing portion 9b of the connector housing 9, and in the flange 10 ', the slit grooves 12a' and 12c 'are formed. Is provided on the terminal fixing portion 9b side.

The positions where the above-mentioned thin portions 14 and 14 'are provided are set with screws 1 for fixing the printed circuit board connector 8.
6 is set on the assumption that a right-hand screw is used.
The direction of rotation of the screw 16 when tightening is shown in FIGS.
In the direction indicated by the arrow.

Therefore, as shown in FIG. 4, the rotation of the screw 16 when tightening causes the thin portion 1 of the flange 10 to rotate.
4, a force F directed toward the outer wall 9a is applied, and the thin portion 14 is compressed.
Can be prevented from being damaged. In the flange 10 ', the thin portion 14' is connected to the thin portion 1 with respect to the screw hole 13 '.
4, the force F due to the rotation of the screw 16 is applied to the outer wall 9a 'with respect to the thin portion 14' even if the same screw 16 as the screw used for the flange 10 is used. And acts in the direction of compression to prevent breakage at the time of tightening similarly to the thin portion 14.

In the above embodiment, a description has been given of the case where two flanges 10, 10 'are provided, one each for the outer walls 9a, 9a' on both sides of the connector housing 9.
When three or more flanges are provided, the positions of the screw holes and the thin portions are set in the same manner as in the above-described embodiment with respect to the outer wall of the connector housing for each flange, so that all the flanges can be tightened. The damage of the flange can be prevented.

FIG. 5 is a front view of a printed circuit board connector 17 showing another embodiment, and FIG. 6 is a sectional view thereof. The printed circuit board connector 17 includes an opposing side wall 18.
a, 18a ', a bottom wall 18b, a ceiling wall 18c, and a cylindrical connector housing 18 surrounded by terminal fixing walls 18d.
A fixing flange (hereinafter simply referred to as a flange) for fixing the printed circuit board 21 to the printed circuit board 21 by using a screw 22 is provided with a male terminal 19 provided through the terminal fixing wall 18d. ) 20, 20 'are provided on the left and right.

As shown in FIGS. 6 and 7, the flange 20 is connected to the side wall 18a and the bottom wall 18 of the connector housing 18.
b and the terminal fixing wall 18d. The terminal fixing wall 1 is provided on the upper surface of the flange 20.
8d, a slit groove 23a opening through the hole 8d is provided, a slit groove 23b formed from the opposite direction is provided below the slit groove 23a, and a slit groove 23c is formed on the bottom wall 18b thereunder in the same direction as the slit groove 23a. The fixing screw holes 24 are formed by overlapping these slit grooves 23a, 23b and 23c. Since the flange 20 'has the same structure as the flange 20, the description is omitted.

With respect to the flanges 20, 20 ', FIG.
When a screwing force as shown by an arrow acts on the side wall 18 of the connector housing 18,
a or 18a ', the bottom wall 18b and the terminal fixing wall 18d
The thin plate portions 25, 25 'formed between the slit grooves 23a, 23c.
Does not deform excessively and does not break. Therefore, the directions of the slit grooves 21a formed on the flanges 20, 20 'may be the same or different.

Also, since the printed board connector 17 has the flanges 20 and 20 'provided inside the connector housing 18, the area occupied by the connector housing 17 can be reduced, and as shown in FIG. 21 can be arranged in parallel with each other closely, and thus is suitable for a high-density circuit.

[0022]

According to the first aspect of the present invention, the position of the thin portion forming the screw hole of each fixing flange provided on the connector is determined by the force generated in the direction of rotation of the screw at the time of tightening. Is provided at the position facing the outer wall of the connector housing through the thin part, so that even if the fastening direction is tightened using a screw with the right direction to each fixing flange, the thin part of each fixing flange may be pulled. Since no force is applied, the fixing flange can be prevented from being damaged due to the occurrence of cracks in the thin-walled portion, and the fixing work to the printed circuit board can be performed quickly and smoothly, thereby significantly improving productivity.

Further, for example, the fixing flange Ru is clamped by the three sides of the wall or the side wall and the bottom wall as well as the terminal fixing wall of the connector housing, without excessive force acts on the thin portion of the fixing flanges, It is possible to prevent the fixing flange from being damaged and the area occupied by the connector housing is small. is there. Furthermore, there is an advantage that the fixing operation of the connector can be performed quickly and smoothly because the tightening direction of the fixing screw is not restricted.

[Brief description of the drawings]

FIG. 1 is a plan view of a printed circuit board connector according to an embodiment of the present invention.

FIG. 2 (1) is a side view of the printed circuit board connector showing a cross section taken along line AA of FIG. 1; (2) corresponds to B- in FIG.
It is a side view of the connector for printed circuit boards which shows the B line section.

FIG. 3 is an explanatory diagram of a step of fixing the printed board connector of FIG. 1 to a printed board.

FIG. 4 is an explanatory diagram of a force acting on a flange of the printed circuit board connector of FIG. 1 when screwing is performed.

FIG. 5 is a front view of a printed circuit board connector according to another embodiment.

6 is a side view of the printed circuit board connector, showing a cross section taken along line CC of FIG. 5;

FIG. 7 is an explanatory view showing a flange of the printed circuit board connector of FIG. 5;

FIG. 8 is an explanatory view showing the direction of a force applied to a flange when the printed circuit board connector of FIG. 5 is tightened with screws.

FIG. 9 is an explanatory view showing a state where the printed circuit board connectors of FIG. 5 are arranged in parallel.

FIG. 10 is a plan view of a conventional printed circuit board connector.

11 is a side view of the printed circuit board connector, showing a cross section taken along line DD of FIG. 10;

FIG. 12 is an explanatory view when screwing the flange of FIG. 10;

FIG. 13 is an explanatory diagram showing directions of forces applied to a flange when screwing the printed circuit board connector of FIG. 10;

[Explanation of symbols]

 Reference Signs List 8 Connector for printed circuit board 9 Connector housing 9a Outer wall 10 Fixing flange 12a, 12b, 12c Slit groove 14 Thin portion 17 Connector for printed circuit board 18 Connector housing 18a, 18a 'Side wall 18b Bottom wall 18d Terminal fixing wall 20, 20' For fixing Flanges 23a, 23b, 23c Slit groove

Claims (1)

(57) [Claims] The connector housing has a screw hole on an outer wall thereof.
A fixing flange for fixing the screw is provided on both sides of the flange.
A first switch having an open end on one side of the flange from the hole.
A first slot into the first slot, a third slit slot, and the screw hole.
Slot and the third slit groove, and
In a printed circuit board connector provided with a second slit groove that opens on one side, a thin portion connecting between the first slit groove and the third slit groove is formed by rotating a fixing screw when tightening. A connector for a printed circuit board, wherein a force is provided at a position toward the outer wall of the connector housing through the thin portion.