JPH0737632A - Surface mount connector - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The soldering part of the lead tip protruding from the back of the housing of multiple contacts housed in an insulating housing arranged in two or more stages on the printed wiring board surface. (EN) Provided is a surface mount connector which can be arranged in a row and can surely prevent the position shift and fluttering of the soldering portion and reduce the mounting space to save space. [Structure] Soldering portion 11 extending along the surface of a wiring board
In a surface mount connector having b to 13b,
The leg portions 11a to 13a of the lead portions 11 to 13 extend along the housing rear surface 2b with their axes shifted so as not to interfere with each other, and the soldering portions 11b to 13a.
Engagement protrusion 1 protruding toward the housing 2 in the vicinity of b
1c to 13c, the engaging protrusions 11c to 13c engage with the position regulating recesses 21 to 23 provided on the housing back surface 2b, and the soldering portions 11b to 13b are aligned in a line on the surface of the wiring board. Is configured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount connector which is placed on a printed wiring board and soldered to a conductive pad formed on the surface of the wiring board.

[0002]

2. Description of the Related Art A surface mount connector of this type is disclosed in, for example, Japanese Unexamined Patent Publication No. 3-134973, in which a plurality of contacts are housed in an insulating housing arranged in two rows above and below the surface of a printed wiring board. The contact has a structure in which the lead portion of each contact protruding from the back surface is formed in a crank shape so that the axis of the contact portion is displaced in parallel, and the soldered portion at the tip of the lead portion is aligned in a line on the printed wiring board. However, a surface mount connector is disclosed in which the bonding state of all the soldered portions can be confirmed after the surface mounting and the defective bonding can be easily corrected.

Further, the surface mounting in which the lead portion of each contact protruding from the rear surface of the insulating housing is engaged with the position regulating guide portion provided on the rear surface side of the housing to prevent the positional deviation in the pitch direction (arrangement direction). The connector is disclosed, for example, in Japanese Utility Model Laid-Open No. 59-126465 and Japanese Patent Laid-Open No. 1-23.
It is known from Japanese Patent No. 5174.

[0004]

However, in the former connector, that is, in the connector disclosed in Japanese Patent Laid-Open No. 3-134973, the lead portion of each crank-shaped contact extends to the rear side of the back side of the insulating housing. However, there is a problem that not only the mounting space becomes large, but also the positional deviation in the pitch direction is likely to occur, and the soldering portion at the tip of the lead portion is fluttered, so that the adhesion failure of the soldering portion is likely to occur.

On the other hand, in the latter connector disclosed in Japanese Utility Model Laid-Open No. 59-126465 or Japanese Patent Application Laid-Open No. 1-235174, the displacement of the lead portion in the pitch direction is prevented, but the solder at the tip of the lead portion is prevented. Flapping of the attachment cannot be eliminated with certainty. Further, since the position regulation guide portion is provided so as to project to the rear surface side of the housing, the lead portion inevitably extends long rearward of the rear surface of the housing, so that a large mounting space cannot be avoided.

The present invention solves the above-mentioned conventional problems, and a soldering portion at the tip of a lead portion protruding from the back surface of the housing of a plurality of contacts housed in an insulating housing arranged in two or more upper and lower stages. Provided is a surface-mounted connector that can be aligned in a line on the surface of a printed wiring board, can reliably prevent positional deviation and fluttering of the soldering portion, and can reduce the mounting space to save space. The purpose is to

[0007]

To achieve the above object, according to the present invention, a plurality of contacts are housed in an insulating housing arranged in two or more steps above and below the surface of a printed wiring board, and protrude from the back surface of the housing. In the surface mount connector, wherein the lead portion of each contact has a leg portion extending toward the wiring board surface and a soldering portion extending along the wiring board surface, the leg portion of the lead portion is Along the back surface of the housing and with an axis shifted so as not to interfere with each other, there is an engaging projection protruding toward the housing in the vicinity of the soldering portion, and the engaging projection is the housing. The soldering portions are arranged in a line on the surface of the wiring board by engaging with the position regulating recesses provided on the back surface of the wiring board.

The bending for shifting the axes of the engaging projections and the leg portions provided on the lead portion of the contact is
The contact can be formed at the same time as the punching process. Further, the contacts can be housed in the housing by arranging the contacts in three or more stages.

[0009]

With the above structure, the leg portion of the lead portion projecting from the rear surface of the housing extends along the rear surface of the housing, and the engaging projection provided on the leg portion is provided on the rear surface of the housing. Since it engages with the regulation recess, the amount of protrusion of the lead portion to the rear of the rear surface of the housing is small, and the mounting space is greatly reduced. Further, since the engaging projections that engage with the position regulating recesses are provided in the vicinity of the soldering portions, positional deviation and fluttering of the soldering portions arranged in a line are surely prevented. It

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a rear view showing an example in which the present invention is applied to a D-sub connector, and FIG. 2 is a vertical sectional side view thereof.

The surface mount connector 1 of the present invention comprises an insulating housing 2 and a front surface (fitting surface) 2a of the insulating housing 2.
From top to back 2b, upper, middle and lower top and bottom 3
It is composed of an upper stage contact group 6, an intermediate stage contact group 7 and a lower stage contact group 8 which are respectively inserted and accommodated in the contact accommodating chambers 3, 4, 5 provided in the stages.

Contact storage chambers 3, 4, 5 in upper, middle, and lower three stages
1 are arranged in a staggered arrangement as shown in FIG. 1, the axis A of the upper contact housing chamber 3 and the lower contact housing chamber 5 are aligned, and the axis B of the intermediate contact housing chamber 4 is a constant distance (K). It is displaced laterally. Then, on the lower side of the back surface 2b of the housing 2, position regulating recesses 21, 22, 23 extending parallel to the axes A and B are provided at a constant pitch (P), of which the recesses 21, 22 have the same shape. The recess 23 is formed as a long groove extending to the lower contact accommodation chamber 6. The position regulating recesses 21, 22, 23 are respectively the lead portions 11, 1 of the contacts 6, 7, 8 which will be described later.
It plays the role of controlling the positions of 2 and 13.

The contacts 6, 7 and 8 are formed by punching and bending a conductive metal thin plate such as a copper alloy, and a female contact portion 9 to be fitted and connected to a pin terminal (not shown) and its U-shaped section. The base portions 10 connected to the side plates of the same have the same shape and are common, but the lead portions 11, 12, 1 connected to the base portion 10 are connected.
The shapes of 3 are different. And each contact 6,
Female contact portions 9 and base portions 7 and 8 of the housing 2 are inserted and accommodated in the respective contact accommodation chambers 4, 5 and 6 of the housing 2, and lead portions 11, 12 and 13 project from the rear surface 2 of the housing 2 and a printed wiring board. It extends toward the surface of 30.

The upper contact 6 is, as shown in FIG.
The lead portion 11 is formed to have the longest length, is bent at a right angle from the base portion 10, extends along the rear surface 2a of the housing 2, and extends toward the surface of the wiring board 30; It has a soldering part 11b extending along the surface, and further has an engaging projection 11c projecting toward the housing 2 in the vicinity of the soldering part 11b. Then, in order to prevent the lead portion 11 from interfering with the lead portions 12 and 13 of the other contacts 7 and 8 which will be described later, as shown in FIGS. 1 and 3 (b), the leg portion 11a is slightly Bend and solder part 11b
The engaging projection 11c is formed so as to be displaced in position so as to extend along the axis A. Since the bending of the leg portion 11a and the soldering portion 11b and the engaging projection portion 11c are formed at the same time as the punching and bending of the contact 6 and a separate step is not required, it is also advantageous in reducing the manufacturing cost.

The middle contact 7 is, as shown in FIG.
The soldering portion 12b and the engaging projection 12c have the same shape as that of the contact 6 except that the leg portion 12a of the lead portion 12 is formed slightly shorter than the leg portion 11a of the lead portion 11 of the contact 6. Has a size. The leg portion 12a is bent more than the leg portion 11a of the contact 6. Such bending of the leg portion 12a and molding of the soldering portion 12b and the engaging protrusion 12c can be performed at the same time as the punching and bending of the contact 7, and no separate process is required.

The lower contact 8 is, as shown in FIG.
The lead portion 13 is slightly different from the lead portion 11 of the upper contact 6 and the lead portion 12 of the middle contact 7,
A leg portion 13a which is bent at a right angle from and extends along the back surface 2a of the housing 2 and toward the surface of the wiring board 30.
Is bent and extended in a direction away from the back surface 2a of the housing 2, and a soldering portion 13b extending along the surface of the wiring board 30 is provided at the lower end of the bent leg portion 13a '.
Further, as shown in FIG. 5B, the leg portion 13a and the bent leg portion 13a 'are not bent and are formed on the same plane as the base portion 10. The soldering portion 13b is the soldering portion 11b.
And 12b have the same shape and size. The leg portion 13a itself also serves as the engagement protrusion 13c corresponding to the engagement protrusions 11c and 12c of the upper contact 6 and the middle contact 7.

When the contact portions 9 of the contacts 6, 7 and 8 having the above-described structure are inserted into the contact receiving chambers 3, 4 and 5 from the rear surface 2b side of the housing 2 and held therein, the lead portion 11 of the upper contact 6 is formed. Of the middle contact 7 is engaged with the position regulation recess 21.
The engaging protrusion 12c of No. 2 engages with the position regulating recess 22, and the leg portion 13a of the lead portion 13 of the lower contact 8 engages with the position regulating recess 23 to solder each contact 6, 7, 8. The parts 11b, 12b, 13b are aligned on the surface of the printed wiring board 30 in a line, and soldered and joined to the conductive pads 31 formed on the surface of the printed wiring board 30.
At this time, the lead portions 11, 1 of the contacts 6, 7, 8
The axes 2 and 13 are arranged such that their axes are offset and do not interfere with each other. When mounting the connector 1 on the printed wiring board 30 and mounting it, the fixing bosses 25, 25 projecting from the bottom of the housing 2 are installed in mounting holes (not shown) provided in the printed wiring board 30. Insert and solder 11
The connector 1 is fixed to the printed wiring board 30 with b, 12b, and 13b positioned on the conductive pad 31.

[0018]

As described above, according to the present invention,
The legs of the lead portions of the contacts protruding from the back surface of the insulating housing extend along the back surface of the housing with their axes offset so as not to interfere with each other, and extend toward the surface of the printed wiring board. Since the abutting portion is configured to engage with the position regulating recess provided on the back surface of the housing, the contact of the lead portion is formed even though the contacts are arranged vertically in two or more stages. The amount of protrusion to the rear of the housing is small,
Therefore, the mounting space can be reduced and the space can be saved.

Further, since the engaging projections of the respective leads engaging with the position regulating recesses are provided in the vicinity of the soldering portions, the soldering portions arranged in a line are displaced and spread. Sticking can be reliably prevented. Furthermore, by arranging the soldering portions in a line, it is possible to easily confirm the soldering state and easily perform correction.

[Brief description of drawings]

FIG. 1 is a rear view of a surface mount connector according to the present invention.

FIG. 2 is a vertical cross-sectional side view showing a mounted state of the surface mount connector according to the present invention.

FIG. 3 shows an upper contact, (a) is a front view,
(B) is a side view.

FIG. 4 shows a middle contact, (a) is a front view,
(B) is a side view.

FIG. 5 shows a lower contact, (a) is a front view,
(B) is a side view.

[Explanation of symbols]

 1 Surface Mount Connector 2 Insulation Housing 2b Housing Rear Surface 3 Upper Contact Storage Chamber 4 Middle Contact Storage Chamber 5 Lower Contact Storage Chamber 6 Upper Contact 7 Middle Contact 8 Lower Contact 11, 12, 13 Leads 11a, 12a, 13a Legs 11b, 12b, 13b Soldering parts 11c, 12c, 13c Engaging projections 21, 22, 23 Position regulating recesses

Claims (3)

[Claims] 1. A plurality of contacts are arranged and housed in an insulating housing in two or more stages above and below the surface of a printed wiring board, and lead portions of each contact protruding from the back surface of the housing face the surface of the wiring board. In a surface mount connector having an extending leg portion and a soldering portion extending along the surface of the wiring board, the leg portion of the lead portion is arranged along the rear surface of the housing and so as not to interfere with each other. And an engaging protrusion that protrudes toward the housing in the vicinity of the soldering portion and that is engaged with a position regulating recess provided on the back surface of the housing, A surface mount connector configured such that the soldering portions are aligned on the surface of the wiring board. 2. The surface mounting according to claim 1, wherein the engagement protrusion and the leg portion provided on the lead portion of the contact are misaligned with the axis at the same time when the contact is punched. connector. 3. The surface mount connector according to claim 1, wherein the contacts are arranged in three or more stages above and below the surface of the printed wiring board and housed in the housing.