JP2603073Y2 - Printed circuit board connector - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is applicable to a plurality of conductive patterns arranged in two rows on a printed circuit board.
Comprising a contactor bets contact tails are arranged in two rows of inner row and outer row having a contact portion to be soldered after being contacted to the conductive pattern on the connector housing, flop
The present invention relates to a printed circuit board connector that is inserted into a lint board from a horizontal direction .

[0002]

2. Description of the Related Art A printed circuit board connector 1 mounted on a terminal portion of a conductive pattern printed on a printed circuit board is provided with a pair of contacts 3 and 4 formed in a connector housing 2 in a vertical direction as shown in FIG. Are provided in the lateral direction, and the contacts 3 and 4 are provided with contact portions 8 and 9 that contact the conductive patterns 6 and 7 formed in two rows on the printed circuit board 5 mounted on the connector housing 2. Having contact tails 10 and 11 having the same. In addition, on the left side of the connector housing 2 in the drawing, the contacts 3 and 4 into which contacts (not shown) such as round pins are inserted and connected.
Is formed. The SMT type (surface-mount type) shown in FIG. 2 has a contact tail 10 that matches the conductive patterns 6 and 7 in two rows in order to reduce the mounting space on the printed circuit board. , 11 are arranged in two rows, an inner row and an outer row. In this type of connector, cream solder is applied to the conductive patterns 6 and 7 of the printed circuit board 5 in advance and then reflowed and soldered. For this reason, the contact tail 10.11 is provided with a constant spring force so that the contact portions 8, 9 make pressure contact with the conductive patterns 6, 7 on the printed circuit board 5.

Accordingly, when the printed circuit board connector 1 is mounted on the printed circuit board 5, the printed circuit board 5 is inserted in the direction of the arrow in FIG.
Contact portions 8 and 9 slide on the surface of the printed circuit board 5 with a constant pressing force. In this case, when the conductive patterns 6 and 7 of the printed circuit board 5 are aligned in the insertion direction of the printed circuit board, the contact tails 10 and 1 are arranged.
Since the contact portions 8 and 7 of 1 are also arranged in the same manner,
A so-called Russell situation occurs in which the contact portions 9 in the outer row slide on the conductive pattern 6 to be brought into close contact with the contact sections 8 in the inner row on the printed circuit board 5 to scrape off the pre-applied cream solder. However, a good soldering state cannot be obtained in the conductive pattern which has been rasped, and a so-called bridge which is led by the contact portion 9 where the shaved cream solder slides and extends in a thread shape to the conductive pattern 7 in another row is called a bridge. This causes a fatal defect that short-circuits between the conductive patterns. Therefore, the conductive patterns 6 and 7 on the printed circuit board 5 and the contact portions 8 and 9 of the contact tails 10 and 11 are arranged in a staggered arrangement, and the respective contact portions 8 and 9 are arranged.
Is slightly smaller than the width of the conductive patterns 6 and 7 in the horizontal direction to avoid Russell.

[0004]

However, in recent years, with the miniaturization of electronic devices, the miniaturization of connectors has been further advanced, and the horizontal pitch of contacts has to be further narrowed. Thus, recently, the pitch of each row of contact tails 10 and 11, ie, each contact 8
The center distance between them and between the contact portions 9 has become narrower to less than 1 mm. When the pitch of the contact portions is set to 1 mm in this way, the width of the contact portions must be reduced so that the contact portions of the contact tails 10 in the inner row and the contact tails 11 in the outer row do not overlap in the insertion direction of the printed circuit board 5. It must be less than 0.5 mm.
However, if the width is reduced to this extent, it is not easy to secure the necessary spring force even if the material of the contact tails 10 and 11 is devised, and the contact portions 8 of the contact tails 10 and 11 shown in FIG. , 9 and the conductive patterns 6, 7 on the printed circuit board 5, as is clear from the schematic diagram, the side edge of the contact portion 8 and the side edge of the contact portion 9 are aligned with each other. The required spring force is barely secured by maximizing the width dimension of the contact portions 8, 9 of FIG.

On the other hand, the printed circuit board 5 used in accordance with such an arrangement of the contact portions 8 and 9 is not so high in the accuracy of positioning the conductive patterns 6 and 7 in the manufacture of the board. Considering that there are tolerances in positioning the connector 1 on the printed circuit board 5,
The application area of the cream solder is formed as shown in FIG. In other words, if attention is paid to the center of the cream solder application area of each of the conductive patterns 7 and 6 in the inner row and the outer row, the arrangement is staggered, but both sides of the cream solder application area of each of the conductive patterns 7 and 6 are arranged. The parts are spread widely enough to overlap each other. Therefore, as described above, when the printed circuit board 5 is mounted on the printed circuit board connector 1, the contact portions 9 of the contact tails 11 in the outer row contact the conductive pattern 7 during the process of contacting the conductive pattern 7 with both sides of the cream solder application area. When sliding on the portion 12, a raschel that scrapes the cream solder occurs, and the cream solder extends in a thread form to the conductive pattern 7 led by the contact portion 9, so-called a short circuit between the conductive patterns 6 and 7. A situation called a bridge occurs, and the connector has a fatal problem. The present invention has been made in order to solve the above-mentioned problems that occur with the miniaturization of such a connector.

[0006]

SUMMARY OF THE INVENTION The present invention provides a contact tail corresponding to a plurality of conductive patterns arranged in two rows on a printed circuit board and having a contact portion which is soldered after being brought into contact with the conductive pattern. the connector housing but the contactor bets that are arranged in two rows of inner row and outer rows
Comprising, a connector for pre <br/> cement board to be inserted from a horizontal direction to the printed circuit board, the connecting portion is provided integrally connecting the separable tips of the contact tails of the outer row of the contact, the connector front and rear left and right sides of the fulcrum shaft mounted rotatably to the housing
Has an intermediate portion of the direction, the plurality of lifting claws that engage the underside of one the the end connecting portion that rotates around the fulcrum shaft is formed, rotates around the fulcrum shaft on the other hand A lever body having a pressing part formed at an end is detachably provided in the connector housing. When the printed board connector is mounted on a printed circuit board, the lever part is pushed down by pressing down the pressing part of the lever body. The lifting claw is lifted about a shaft so that the contact portions of the contact tails in the outer row can be mounted so as not to contact the conductive patterns corresponding to the contact tails in the inner row.

[0007]

FIG. 1A is a perspective view showing an example of a printed circuit board connector according to the present invention, and FIG. 1B shows an example of a printed circuit board compatible with the printed circuit board connector. Printed circuit board connector 21 shown in FIG.
A mating protrusion 23 in which a contact for mating with a mating connector (not shown) is accommodated on the front side of a resin connector housing 22; And two contact tails 24, 25, one row and one outer row.
25 has contact portions 30 and 31 that contact the conductive patterns 52 and 53 when the printed board 51 is inserted. The connector housing 22 has a guide portion 26 for guiding the fitting notch portion 54 of the printed board 51, a mounting hole 27 for engaging with a fixing screw hole 55 of the printed board 51, and a fulcrum for a lever body 41 described later. The shaft 42 has a bearing recess 28 into which the shaft 42 is dropped. Further, each end of the contact tails 25 in the outer row is connected to a band-like connecting portion 29 formed from the same member at the time of forming the contact tails.
And are connected integrally. There is no difference from the conventional printed circuit board connector except for the provision of the guide portion 26, the concave portion 28 for bearing, and the connecting portion 29.

The printed circuit board connector 21 shown in FIG. 1A has a detachable lever body 41. The lever body 41 is provided with a short columnar fulcrum shaft 42 which engages with the bearing concave portion 28 of the printed circuit board connector 21 on both sides of the substantially middle portion thereof, and the fulcrum between the fulcrum shafts 42. ing. One end pivoting about the fulcrum shaft 42 has four parallel lifting claws 43 in contact with the lower side of the connecting portion 29 of the contact tail 25 in the outer row.
The point where the lifting claw 43 is in contact with the connecting portion 29 is the point of force of the lever body 41, and the other end that rotates about the fulcrum shaft 42 is a predetermined distance between the lever and the fitting protrusion 23. The plate-shaped pressing portion 44 extending at an interval serves as an operating point of the lever body 41. This lever body 41 is AB
Any material such as S resin or metal that can lift the connecting portion 29 by a predetermined amount by leverage may be used. And the lever body 41
The push-down portion 44 is adapted to be able to easily apply a push-down force to the tip of the push-down portion 44 by grasping it with one hand together with the fitting protrusion 23.

Further, the fulcrum shaft 42 is dropped into the bearing recess 28 opened on the upper surface of the connector housing 22 and is rotatable. That is, when a pressing force is applied to the pressing portion 44, the downward displacement causes the lifting claw 43 to be displaced upward via the fulcrum shaft 42.
9 is lifted by the lifting claws 43, and at the same time, the contact portions 31 of the contact tails 25 in the outer row are also lifted upward. About 2 mm is enough for the lifting amount of the contact portion 31. If the lifting amount is too large, the contact tail 25 is permanently deformed, which is not preferable.

In this embodiment, when the push-down portion 44 is pushed down until it comes into contact with the fitting projection 23, the displacement of the lifting claw 43 raises the connecting portion 29 by an appropriate amount. A prismatic stopper leg 46 is provided at the lower end 45.
Is provided. The stopper leg 46 may be integrally formed as a part of the lever body, and may have any shape as long as the stopper leg 46 can contact the fitting projection 23 to limit the amount of pushing down. The lever body 41 can be easily detached from the connector housing 22. The timing for removing the lever body 41 is after inserting the printed board connector 21 into the printed board 5,
It is better before the reflow of the cream solder, but it may be after the flow. Further, the lever body 41 can be reused.

The connecting portion 29 of this embodiment is made of the same member as the contact tail 25, that is, made of a conductive material, and must be removed when used as a connector. For this purpose, at the tip of the contact tail 25 near the connecting portion 29 or at an appropriate portion in the middle with the contact portion 31,
A notch (not shown) for folding is provided in advance, and after the printed circuit board connector 21 is inserted into the printed circuit board 5, the connecting portion 29 is removed. However, when a tool such as a cutter is used for cutting, the notch for cutting need not be provided. When an insulating material such as resin or ceramic is used for the connecting portion, it is not necessary to remove the connecting portion.

[0012]

As described above, according to the structure of the present invention, since the contact portions of the contact tails in the outer row do not slide on the conductive pattern for the inner row, a bridge by Russell is generated. Can completely solve the conventional problem. Also, even if the contact portions of the contact tails of the outer row and the inner row are completely overlapped with each other in the insertion direction of the printed circuit board, no Russell occurs, so that the pitch of the contacts can be greatly reduced. As a result, the size of the printed circuit board connector can be reduced in accordance with the downsizing of the electronic device, and the effect is extremely remarkable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a printed circuit board connector according to an embodiment of the present invention and a printed circuit board in which the connector is used.

FIG. 2 is a cross-sectional view illustrating a fitting relationship between a printed circuit board connector and a printed circuit board.

FIG. 3 is a schematic diagram showing an arrangement relationship between a contact portion of a contact tail and a conductive pattern on a printed circuit board.

[Explanation of symbols]

 1,21 Printed circuit board connector 2,22 Connector housing 3,4 Contact 5,51 Printed circuit board 6,7,52,53 Conductive pattern 8,9,30,31 Contact part 10,24 Inner row contact tail 11,25 Outer row contact tails 12, 23 Fitting projection 26 Guide part 27 Mounting hole 28 Bearing recess 29 Connecting part 41 Lever body 42 Support shaft 43 Lifting claw 44 Push-down part 45 Lower end part 46 Stopper leg 54 Notch for fitting Part 55 Fixing screw hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 23/68 H01R 9/09

Claims (1)

(57) [Scope of request for utility model registration] 1. A contour corresponding to a plurality of conductive patterns arranged in two rows on a printed circuit board and having a contact portion which is soldered after being brought into contact with the conductive pattern.
Kutoteru provided in the connector housing Contours <br/> click preparative arranged within two rows of inner row and an outer row, the printed circuit board
In a printed circuit board connector inserted from the horizontal direction, a connecting portion is provided for integrally connecting a tip of a contact tail in an outer row of the contact so as to be detachable, and a fulcrum mounted rotatably to the connector housing. A plurality of lifting claws are formed at one end that pivots about the fulcrum shaft at one end that has a shaft at the middle portion in the front-rear direction on both the left and right sides, and a plurality of lifting claws are engaged with the lower side of the connecting portion. A printed circuit board connector, characterized in that a lever body having a push-down portion formed at the other end pivoting about the center is detachably provided in the connector housing.