JPH0594957U - Multi-lead connector - Google Patents

Abstract

(57) [Summary] [Purpose] The guide lead is bent to provide the guide function for the normal lead. [Construction] At least three of the leads of the multi-lead connector 12 are lengthened to form a guide lead 13, and a middle guide lead 13B located on the inner side of the guide lead 13 is bent and formed in a protruding shape. The outer guide leads 13A and 13C located outside the middle guide lead 13B are bent and formed in a protruding shape in a direction opposite to the bending direction of the middle guide lead 13B. Thereby, when the lead is inserted into the insertion hole 9 of the substrate 8, the guide function for the short normal lead 4 is exerted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-lead connector, and more particularly to a multi-lead connector having a guide function for automatic lead insertion.

[0002]

[Prior Art]

 Generally, when mounting and fixing a multi-lead connector, such as a multi-pin radial taping connector, which has many leads to a printed circuit board, etc., set only a few of the leads to a long length in advance. Then, it has a guiding function for the insertion hole of the printed circuit board, and the automatic insertion is performed. FIG. 6 shows a conventional multi-lead connector 1 before mounting on a board. From the connector body 2, two long guide leads 3 for guiding the automatic insertion and a normal lead 4 shorter than this are drawn out. The tip of the guide lead 3 is fixed to a taping mount 5 for holding and carrying the connector itself, for example, with an adhesive tape (not shown), and the taping mount 5 has a feed hole 6 used for carrying. Is formed. FIG. 7 is a diagram showing an arrangement of leads of the multi-lead connector.

An automatic insertion device is generally used to attach the multi-lead connector 1 to a printed circuit board. First, a guide lead 3 of a multi-lead connector which is carried while being held on a taping mount 5 is provided at its tip. Then, the taping backing sheet 5 is removed, and the guide pin 7 of the automatic insertion device is inserted into the insertion hole 9 of the printed circuit board 8 from below as shown in FIG. 8 (A) and held by the pusher 10. The tip of the guide lead 3 of the multi-pin connector is engaged with the engaging recess 11 formed at the tip of the guide pin 7. The relationship between the multi-pin connector and the guide pin 7 at this time is shown in FIG. At this time, the length of the normal lead 4 is set to, for example, about 2.5 mm, and the length from the tip of the normal lead 4 to the tip of the cut guide lead 3 is set to, for example, about 9 mm. ..

Next, by gradually lowering the guide pin 7 as shown in FIG. 8B, the multi-lead connector 1 is lowered while being sandwiched between the pusher 10 pushed by the spring and the guide pin 7. The guide lead 3 is guided to the insertion hole 9 and inserted therethrough. FIG. 8B shows a case where the guide lead 3 is biased to the edge of the insertion hole 9. By further lowering the guide pin 7 in this manner, the ordinary leads 4 having a short length are also inserted into the corresponding insertion holes.

[0005]

[Problems to be solved by the device]

 By the way, in the multi-lead connector having the above-described structure, the normal lead 4 having a short length, for example, the guide lead 3 is twisted relative to the arrangement of the insertion holes 9 as shown in FIG. There is a problem in that it may be caught by the upper edge of the insertion hole 9 and cannot be inserted accurately, and so-called automatic insertion error often occurs.

It is considered that this problem is caused by the following reasons acting synergistically. The position of the insertion hole 9 of the printed circuit board 8 formed by pressing with a mold varies from lot to lot. A clearance is basically required to insert the guide pin 7 into the insertion hole 9 of the printed circuit board 8. However, the clearance causes a positional deviation. For example, the guide pin 7 has a diameter L1 of about 0.70 mm, and the insertion hole 9 of the printed circuit board 8 has a diameter L2 of 1.0 mm + 0.1 mm-0.0 mm. Therefore, the clearance is 0.3 to 0 mm. It will be 0.4 mm. The guide pin 7 has a slight taper at its tip, and since the guide pin 7 has a length of about 7 cm, it can absorb the flexure and fit into the position of the insertion hole. Even if the guide pin 7 is slightly displaced from the clear clearance, the guide pin 7 will surely enter the insertion hole 9.

At the time when the short lead 4 is inserted, the guide pin 7 is disengaged from the edge of the insertion hole on the lower surface of the printed board and the position regulation of the guide pin 7 with respect to the insertion hole 9 is released. Usually shifts to the positional relationship between the lead 4 and the insertion hole 9. In this case, as shown in FIG. 11, the cross section of the normal lead 4 (the same applies to the guide lead) has a vertical length L3 and a horizontal length L4 of about 0.3 mm and 0.5 mm, respectively. The hole 9 (diameter: about 1 mm) is more affected by the length of about 0.3 mm in the vertical direction, and a clearance of about 0.6 mm is generated in this direction. Misalignment occurs.

The variation in the lead arrangement of the multi-lead connector increases as the number of leads increases. The relative twist of the two guide leads 3 for automatic insertion increases as the distance from the leads 3 increases. The present invention has been devised in order to effectively solve the above problems. An object of the present invention is to provide a multi-lead connector in which the guide lead is bent to provide a guide function for the normal lead.

[0009]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of long lead leads that guide the insertion holes of a board having a plurality of insertion holes for mounting the leads. And a normal lead shorter than the guide lead, in a multi-lead connector, at least three of the long guide leads are formed, and the middle guide lead located in the middle of the three guide leads is the lead. Is bent and formed in a direction orthogonal to the arrangement direction, and the other two outer guide leads are bent and formed in a direction opposite to the bending direction of the middle guide lead.

[0010]

[Action]

 Since the present invention is configured as described above, since the inner guide lead and the outer guide lead are bent and formed in a protruding shape in mutually opposite directions, when inserting this into the insertion hole of the substrate, The protruding bent portion interferes with the wall surface of the insertion hole to correct and correct the twist of the connector itself so that the arrangement direction of the insertion hole of the board and the arrangement direction of the leads of the connector are substantially aligned. Therefore, a normal lead having a short length can be easily inserted into the insertion hole of the substrate.

[0011]

【Example】

 An embodiment of the multi-lead connector according to the present invention will be described below in detail with reference to the accompanying drawings. 1 is an enlarged perspective view showing an embodiment of a multi-lead connector according to the present invention, and FIG. 2 is a bottom view of the connector shown in FIG. The same parts as those of the conventional connector shown in FIG. 6 are designated by the same reference numerals. As shown in the figure, this multi-lead connector 12 is shown to have seven leads, and from the lower part of the rectangular parallelepiped-shaped connector body 2, four normal leads 4A to 4D having a short length and, for example, a printed board. It has a plurality of long guide leads 13 for guiding the substrate 8 to the insertion hole 9. At least three guide leads 13 are provided, and in this embodiment, three guide leads 13A, 13B, and 13C are sequentially arranged. As shown in FIG. 2, the leads 4 and 13 are linearly arranged at a lower portion of the connector body 2 at predetermined intervals along the longitudinal direction, and the four normal leads 4A to 4D. Are divided into two and are located at both ends of the array, and three potential leads 13 are located in the center.

The middle guide lead 13B located on the inner side of the three guide leads 13 having a length longer than that of the normal lead 4 is a direction orthogonal to the arrangement direction of each lead, that is, The connector body 2 is bent and formed so as to project in the width direction, and its tip portion 14B is formed to be linear in the height direction of the connector body 2. Further, the two outer guide leads 13A and 13C located on both sides of the inner guide lead 13B are bent and formed in a protruding shape in a direction opposite to the bending direction of the inner guide lead 13B, and their tip portions are formed. 14A and 14C are formed so as to be linear in the height direction of the connector body, like the middle side guide lead 13B. Therefore, when the leads are automatically inserted, the vertices 15A, 15B, and 15C of the bent portions of the guide leads 13A to 13C are in contact with the inner walls of the insertion holes 9 of the printed circuit board 8 to regulate the lead arrangement direction. Are configured so as to coincide with the arrangement direction of the insertion holes 9.

Therefore, the maximum bending amount LB of the middle guide lead 13B and the maximum bending amount LA, LC of the outer guide leads 13A, 13C are made equal, and preferably the radius of the insertion hole 9 is made equal. .. Further, the bent shape of each of the guide leads 13A to 13C is mountain-shaped in the present embodiment, but is not limited to this and may be formed into a curved shape, for example, an arc shape. The leading ends of the guide leads 13A to 13C of the multi-lead connector 12 thus formed are attached to the taping mount 5 having the feed holes 6 as shown in FIGS. 3 and 4 by an adhesive tape or the like (not shown).

Next, the operation of this embodiment configured as described above will be described with reference to FIG. First, as shown in FIGS. 3 and 4, the multi-lead connector 12 is conveyed to a predetermined position of an automatic insertion device (not shown) while being held by the taping mount 5, and the guide leads 13A to 13C is cut at its tip, and the taping mount 5 is removed. The state at this time is shown in FIG. 1, for example. Then, the multi-lead connector 12 from which the taping mount 5 has been removed is held from above the printed circuit board 8 by the pusher 10 as shown in FIG. Goes up through the insertion hole 9 of the substrate and rises, and the tip portions 14A, 14B, 14C of the respective guide leads 13A to 13C engage with the corresponding engaging recesses 11 at the tips of the respective guide pins 7. In this embodiment, three guide pins 7 are provided in correspondence with the number of guide leads, and in FIG. 5, the outer guide guide 13A is described as a representative.

When the guide pin 7 is gradually lowered while the connector 12 is sandwiched between the pusher 10 and the guide pin 7 in this manner, as shown in FIG. Will be inserted into the corresponding insertion holes 9. In this case, when the leads in each case are biased toward the edge of the insertion hole 9, the guide leads 13A to 13C are respectively bent in the radial direction of the insertion hole 9, and furthermore, the middle side inside of the case is positioned. The bending direction of the lead 13B is opposite to the bending direction of the outer guide leads 13A, 13C located on both sides thereof, so that the guide leads 13A to 13C deviate as the guide leads 13A to 13C descend. In the case of the illustrated example, the bent portion of the outer guide lead 13A comes into contact with the edge of the insertion hole 9, and the outer guide lead 13A is restricted toward the central portion of the insertion hole 9. Such regulation will be exerted also on the other guide leads 13B and 13C, so that the relative twist of each guide lead is eliminated, and the apex 15A of the bent portion of each guide lead 13A to 13C. When the 15C passes through the insertion holes 9, the tips of the normal leads 4 each having a short length are guided so as to be located at the centers of the corresponding insertion holes 9, as shown in FIG. 5C. Become. In this case, since the guide leads 13A to 13C are restricted by the bent portions, the arrangement directions of the leads 4A to 4D and 13 and the arrangement directions of the insertion holes 9 of the printed circuit board 8 are substantially the same. As a result, as described above, the normal leads 4A to 4D are located at the centers of the insertion holes 9.

In this state, by further lowering the guide pin 7, each of the normal leads 4A to 4D is surely inserted into the corresponding insertion hole 9, and its tip is caught on the edge of the insertion hole 9. Insertion error will not occur. In order to fully exert the guiding function of the guide leads 13A to 13C, it is preferable to set the tips of the ordinary leads 4 to be the same as the horizontal level of the apexes 15A to 15C of the bent portions of the guide leads. Further, in the present embodiment, the center lead of the seven leads is the middle guide lead 13B, and the leads adjacent to both sides of this are the outer guide leads 13A and 13C. There is no limitation, and any of the seven leads except the leads at both ends may be used as the middle guide lead, and as long as the middle guide lead is located inside (need not be adjacent). Any two leads may be outer guide leads. Furthermore, it goes without saying that the number of leads is not limited to these seven.

[0017]

[Effect of the device]

 As described above, according to the multi-lead connector of the present invention, the following excellent operational effects can be exhibited. Since the guide leads are bent in mutually opposite directions so as to have the guide function, it is possible to eliminate the twist of each guide lead and normally locate the lead at the center of the insertion hole. Therefore, a normal lead insertion error can be eliminated.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing an embodiment of a multi-lead connector according to the present invention.

FIG. 2 is a bottom view of the connector shown in FIG.

3 is a front view showing a state in which a taping mount is attached to a guide lead of the connector shown in FIG.

FIG. 4 is a side view of the connector shown in FIG.

5 is an explanatory diagram for explaining a state when the connector shown in FIG. 1 is attached to a substrate.

FIG. 6 is a front view showing a state in which a taping mount is attached to a guide lead of a conventional multi-lead connector.

FIG. 7 is a bottom view showing the connector shown in FIG.

FIG. 8 is an explanatory diagram for explaining a state when the connector shown in FIG. 6 is attached to a printed circuit board.

FIG. 9 is a front view showing a state in which a guide pin is engaged with a guide lead.

FIG. 10 is a diagram showing a state in which the normal lead and the insertion hole are displaced.

FIG. 11 is a view showing a cross section of a lead.

[Explanation of symbols]

2 ... Connector body, 4, 4A, 4B, 4C, 4D ... Normal lead, 8 ... Printed circuit board (board), 9 ... Insertion hole, 12
... Multi-lead connector, 13 ... Guide lead, 13A, 13
C ... outer guide lead, 13B ... middle guide lead.

Claims (1)

[Scope of utility model registration request] 1. A plurality of long guide leads that guide the insertion holes of a board having a plurality of insertion holes for attaching leads when the substrates are inserted into the insertion holes, and a normal lead shorter than the guide leads. In a multi-lead connector having
At least three long guide leads are formed, and the middle guide lead located on the inner side of the three guide leads is bent and formed in a protruding shape in a direction orthogonal to the arrangement direction of the leads. A multi-lead connector characterized in that the other two outer guide leads are formed by bending in a direction opposite to the bending direction of the inner guide lead.