JPH11185902A - Electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector, whose space factor on a printed circuit board is small inspite of multiplier nature. SOLUTION: This connector comprises an insulating housing 2 having a card slot 4 formed in a front face 2a, and a plurality of terminals 3A, 3C, 3E mounted in the housing 2 at a prescribed pitch along the longitudinal direction of the card slot 4, wherein contacts 11a, 11c, 11e of spring beams 10a, 10c, 10e of the terminals 3A, 3C, 3E face up or down in the card slot 4. In this case, two arrangements of the three contacts 11a, 11c, 11e, i.e., one in which the two contacts 11c and 11e face down and the other one 11a up, and the other in which the one contact faces down and the other two up, are disposed next to each other along the longitudinal direction of the card slot 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to electrical connectors for use in interconnecting printed circuit boards, such as motherboards and daughter boards.

[0002]

2. Description of the Related Art Conventionally, as an electrical connector of this kind, an insulating housing having a card slot opened on the front surface and a plurality of terminals mounted at a predetermined pitch along the longitudinal direction of the card slot in the insulating housing. There has been known an electrical connector in which a contact portion of a spring beam of each terminal faces a card slot from the upper and lower sides (for example, JP-A-7-21407). A printed circuit board (on which an electrical connector is mounted) is electrically connected to conductive pads provided on both upper and lower surfaces of the printed circuit board inserted into the card slot by engaging contact portions facing the inside of the card slot. The motherboard) and the printed circuit board (daughterboard) inserted into the card slot are connected.

[0003]

In the electric connector as described above, the engagement between the contact portion in the card slot and the conductive pad is made by the width of the conductive pad in order to secure an electrically reliable connection. Are wider than circuit traces. As a result, as the number of poles of the conductive pads and the terminals increases, the length of the electric connector also increases in the longitudinal direction of the slot, and the electric connector occupies a larger area on a printed circuit board (mother board). The printed circuit board (daughter board) to be inserted was also large. In recent years, as electronic devices have been reduced in size, there has been a demand for an electrical connector that can reduce the area occupied on a printed circuit board.

[0004] The present invention has been made in view of the above problems, and has as its object to provide an electric connector having a structure in which the area occupied on a printed circuit board can be reduced irrespective of the number of poles.

[0005]

SUMMARY OF THE INVENTION The present invention has been made with the above object, and has a contact portion for engaging with a conductive pad.
The arranged rows and the arranged one row are alternately provided so that the terminal mounting pitch is small and the width of the conductive pad engaging with the contact portion can be increased.

That is, the first aspect of the present invention comprises an insulating housing having a card slot opened on the front surface, and a plurality of terminals mounted on the insulating housing at a predetermined pitch P along the longitudinal direction of the card slot. In the electrical connector, the contact portions of the spring beams of the respective terminals face the upper and lower sides in the card slot, and the contact portions of the spring beams of the terminals are two from the upper side of the card slot and from the lower side. The arrangement of the terminals facing one and the arrangement of the terminals such that the contact portion of the spring beam faces one from the upper side and two from the lower side of the card slot alternately along the longitudinal direction of the card slot. An electrical connector characterized by being arranged.

According to a second aspect of the present invention, the terminal includes a terminal mounted from a front surface of the insulating housing, and a terminal mounted in two stages vertically from a rear surface of the insulating housing.
A terminal mounted from the front of the insulating housing and a solder tail that allows surface soldering are provided on the terminal mounted on the upper rear side, and reflow dip soldering on the terminal mounted on the lower rear side of the insulating housing. The electrical connector according to claim 1, further comprising a pin terminal that can be attached.

Further, according to the third aspect of the present invention, there is provided an insulating housing having a card slot opened on the front surface, and a plurality of terminals mounted on the insulating housing at a predetermined pitch P along a longitudinal direction of the card slot. In an electrical connector, a contact portion of a spring beam of each terminal is arranged to face from above and below in a card slot.
On the upper and lower sides of the card slot, the row in which two contact portions face and the row in which one contact portion faces are shifted by the pitch P at a pitch 2P which is twice the pitch P. An electrical connector, wherein the electrical connector is arranged in a vertical position.

[0009]

According to the electrical connector of the present invention, it is possible to reduce the mounting pitch of the terminals to the insulating housing and to increase the width of the conductive pad engaging with the contact portion. As a result, the electrical connector can be miniaturized as much as possible irrespective of the increase in the number of poles of the terminal, and the area occupied on the printed circuit board (motherboard) can be reduced. In addition, since the width of the conductive pad can be increased, the engagement of the spring beam with the contact portion can be ensured, and an electrically stable connection can be formed. According to the second aspect of the present invention, since the solder tails provided on the rear surface side of the insulating housing are arranged in one row, the depth dimension of the electric connector including the solder tails (the front-back direction of the insulating housing) is reduced. This can particularly contribute to miniaturization.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial plan view of an electric connector 1 according to an embodiment of the present invention, and FIGS.
It is sectional drawing shown along the B line.

An electric connector 1 according to an embodiment includes an insulating housing 2 which is elongated in the left-right direction of FIG. 1 and a plurality of terminals 3 mounted on the insulating housing 2. As described below, the terminal 3 includes six types of terminals 3A, 3B, 3C, 3D, 3E, and 3F having different shapes (in addition,
When a specific terminal is not designated, it is simply set to “3”. The same applies to other elements. ). First, the structure of the insulating housing 2 will be described. A flat card slot 4 is formed inside in a longitudinal direction (the left and right direction in FIG. 1), and an opening 5 formed in a front surface 2a of the insulating housing 2 is formed. Through the printed circuit board (daughter board)
6 can be inserted. Along the longitudinal direction of the card slot 4, partition walls 7 a and 7 b are formed at a constant pitch P above and below the card slot 4, and the terminals 3 are provided between the partition walls 7 a and between the partition walls 7 b. Terminal receiving spaces 8a and 8b are formed respectively. Terminal holding portions 9a, 9b, 9c are formed along the respective terminal receiving spaces 8a, 8b, so that the terminals 3 can be mounted from the front surface 2a side and the rear surface 2b side of the insulating housing. , Mounted terminal 3
Can be held.

[0013] Six types of terminals 3 are mounted on the insulating housing 2 having the above-described structure. As shown in FIG.
1c, 11e, and 1 below the card slot 4.
A row in which the contact portions 11a face each other, and one contact portion 11d above the card slot 4 and two contact portions 11d below the card slot 4 as shown in FIG.
The rows in which the contact portions 11b and 11f face each other appear alternately. That is, the arrangement of the contact portions 11a, 11c and 11e as shown in FIG.
The contact portions 11b, 11d, and 11f shown in FIG. 3 are arranged at a pitch 2P shifted from each other by the pitch P. Focusing on the upper or lower side of the card slot 4, two contact portions 1
The row facing 1 and the row facing one contact portion 11 are arranged at a pitch 2P and shifted by the pitch P, respectively.

In order to obtain such an arrangement of the contact portions 11a-11f, the terminals 3 are composed of six types of terminals 3A, 3A,
B, 3C, 3D, 3E, and 3F.
As shown in FIG. 2, the first terminal 3A is mounted in the terminal receiving space 8b below the card slot 4 from the front surface 2a side of the insulating housing 2, and the spring beam 1A is provided.
0a faces the card slot 4 from below the card slot 4 so that the contact portion 11a is located substantially at the center of the card slot 4, and the second terminal 3B
Is a front surface 2 of the insulating housing 2 as shown in FIG.
a side, the terminal receiving space 8b below the card slot 4
, The spring beam 10b faces into the card slot 4 from below the card slot 4, and the contact portion 11b is located in front of the card slot 4. Each of the terminals 3A and 3B has support projections 12a and 12b toward the rear.
The terminals 2a and 12b are held in the insulating housing 2 by being fitted and locked in the terminal holding portions 9a. Each terminal 3A, 3
Solder tail 13 for surface soldering in front of B
a and 13b are connected in series, and these solder tails 13
a and 13b are substantially flush with the bottom surface 2c of the insulating housing 2 and protrude forward of the front surface 2a.

As shown in FIG. 2, the third terminal 3C is mounted in the terminal receiving space 8a above the card slot 4 from the rear surface 2b side of the insulating housing 2 so that the spring beam 10c is inserted into the card. The contact portion 11c faces the inside of the card slot 4 from the upper side of the slot 4, and the contact portion 11c is located in front of the card slot 4.
As shown in FIG. 3, the terminal 3D is mounted in the terminal receiving space 8a above the card slot 4 from the rear surface 2b side of the insulating housing 2, and the spring beam 10d is inserted from above the card slot 4 into the card slot. 4
The contact portion 11d is located substantially at the center of the card slot 4. Support protruding pieces 12c and 12d are connected to these terminals 3C and 3D toward the front, and these support protruding pieces 12c and 12d are connected to the terminal holding portions 9b.
The terminals 3 </ b> C and 3 </ b> D are held in the insulative housing 2 by fitting and locking the terminals 3 </ b> A. In addition, each terminal 3C, 3D
, Solder tails 13c and 13d are continuously provided via hanging pieces 14c and 14d, and the bottom surface 2 of the insulating housing 2 is provided.
c and is projected to the rear of the rear surface 2b substantially flush with the rear surface 2b.

Further, as shown in FIG. 2, the fifth terminal 3E is mounted in the terminal receiving space 8a above the card slot 4 from the rear surface 2b side of the insulating housing 2, and the spring beam 10e is attached to the card. The contact portion 11e faces the inside of the card slot 4 from above the slot 4, and the contact portion 11e is located behind the card slot 4. The sixth terminal 3F is, as shown in FIG. 2 is attached to the terminal receiving space 8b below the card slot 4 from the rear surface 2b side, the spring beam 10f faces the inside of the card slot 4 from below the card slot 4, and the contact portion 11f is It is designed to be located at the rear. Support protruding pieces 12e and 12f are also connected to the terminals 3E and 3F toward the front, and the support protruding pieces 12e of the terminal 3E are connected to the third terminal holder 9c.
, While the support projection 12f of the terminal 3F is fitted and locked from behind into the terminal holding portion 9a provided for the terminals 3A and 3B. In addition, instead of the solder tails 13a to 13d, pin terminals 15e and 15f that hang down over the bottom surface 2c of the insulating housing 2 are connected to these terminals 3E and 3F. These pin terminals 15e and 15f have their hanging positions changed, and as a whole, are staggered as shown in FIG.

The solder tails 13a and 13b have the same shape, and are formed on the front surface 2a of the insulating housing 2.
Are arranged in a single row at a pitch P in front of. The solder tails 13c and 13d have the same shape, and are arranged in a line at a pitch P behind the rear surface 2b of the insulating housing 2.

The electric connector 1 of the above embodiment is used by being surface-mounted on a printed circuit board 16 serving as a motherboard. For mounting, the solder tails 13a to 13d are connected to conductive lands 17 formed on the surface of the printed circuit board 16.
And fixed by surface soldering by a solder reflow method, and the pin terminals 15e, 15f
Are inserted into conductive through holes 18 formed in the printed circuit board 16 and fixed by a reflow dip method. Fixing of solder tails 13a to 13d and pin terminals 15
The fixing of e and 15f can be performed simultaneously.

The conductive pads 19 provided on the front surface 6a and the back surface 6b of the printed circuit board 6 to be inserted into the card slot 4 with respect to the electrical connector 1 of this embodiment have the patterns shown in FIGS. . A row in which two conductive pads 19 are provided corresponding to the two contact portions 11 is provided at a pitch 2P which is twice the pitch P, and one conductive pad is provided corresponding to one contact portion 11. The row provided with 19 is shifted by pitch P and pitch 2P
Will be provided. Providing the conductive pads 19 in such a pattern means that the width W of the conductive pads 19 can be made relatively wide even if the values of the pitches P and 2P are reduced. The pitch can be reduced, and a stable electrical connection between the contact portion 11 and the conductive pad 19 can be ensured.

As described above, since the parallel pitch P of the terminals 3 and the parallel pitch P of the conductive pads 19 can be reduced,
The electrical connector 1 can be reduced in size by suppressing the length in the longitudinal direction due to the increase in the number of poles, and as a result, the occupied area when mounted on the printed circuit board 16 can be reduced. In addition, the printed circuit board 6 to be inserted into the card slot 4 can also be restrained from increasing in the width direction, so that a downsized daughter board can be used. The conductive pad 19 has a relatively large width so that reliable engagement with the contact portion 11 can be formed.
Electrically stable connection can be secured.

Also, as in the embodiment, the insulating housing 2
The terminals 3E and 3F mounted on the lower side of the rear surface 2b are formed by connecting pin terminals 15e and 15f in place of the solder tail, so that the solder tails 13 aligned on the rear surface 2b side of the insulating housing 2 are arranged in one row. Can be
As a result, the depth dimension of the electrical connector 1 in the front-back direction including the solder tail 13 can be reduced, and the area occupied on the printed circuit board 16 can be further reduced.

[0021]

As described above, according to the electrical connector of the present invention, the arrangement of the contact portions is made unique so that the parallel pitch of the terminals can be reduced. It is possible to provide an electric connector having a structure in which the occupied area can be reduced irrespective of the number of poles. Further, when the terminals mounted on the lower part of the rear surface of the insulating housing are provided with pin terminals in place of the solder tail, the depth dimension in the front-rear direction is reduced, and the occupied area can be further reduced. A connector can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of an electric connector according to an embodiment of the present invention, which is cut away.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a partial surface view of a printed circuit board inserted into a card slot of the electrical connector according to the embodiment.

FIG. 5 is a partial back view of the printed circuit board inserted into the card slot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electric connector 2 Insulated housing 2a Front surface of insulated housing 2b Back surface of insulated housing 2c Bottom surface of insulated housing 3, 3A, 3B, 3C, 3D, 3E, 3F Terminal 4 Card slot 5 Opening 6 Printed circuit board 7a, 7b Partition wall 8a, 8b Terminal receiving space 9a, 9b, 9c Terminal holding part 10a, 10b, 10c, 10d, 10e, 10f
Spring beams 11a, 11b, 11c, 11d, 11e, 11f
Contact portions 12a, 12b, 12c, 12d, 12e, 12f
Support protruding pieces 13a, 13b, 13c, 13d Solder tail 14c, 14d Hanging pieces 15e, 15f Pin terminal 16 Printed circuit board 17 Conductive land 18 Conductive through hole 19 Conductive pad

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Dan Cargulin Nihon Molex Co., Ltd.

Claims (3)

[Claims] 1. An insulating housing 2 having a card slot 4 opened on a front surface 2a, and a plurality of terminals 3 mounted on the insulating housing 2 at a predetermined pitch P along a longitudinal direction of the card slot 4. The contact part 11 of the spring beam 10 of each terminal 3 is inserted into the card slot 4.
In the electric connector 1 facing from the upper and lower sides, the contact portion 11 of the spring beam 10 of the terminal 3
However, the arrangement of the terminals 3 facing two from the upper side and one from the lower side of the card slot 4 and the contact portion 11 of the spring beam 10
An electrical connector characterized in that the terminals (3, 2) facing one another from below are alternately arranged along the longitudinal direction of the card slot (4). The terminal (3) is provided on the front surface (2) of the insulating housing (2).
a and terminals 3A and 3B to be mounted from
Terminals 3C, 3D mounted on the upper and lower two stages from the rear surface 2b,
3E, 3F, and the front surface 2a of the insulating housing 2.
And terminals 3A, 3B mounted on the rear surface 2b and terminals 3C, 3D mounted on the upper surface of the rear surface 2b are provided with solder tails 13a, 13b, 13c, 13d capable of surface soldering, and the rear surface of the insulating housing 2. The electrical connector according to claim 1, wherein the terminals (3E, 3F) mounted on the lower stage of (2b) are provided with pin terminals (15e, 15f) capable of reflow dip soldering. 3. An insulating housing 2 having a card slot 4 opened in a front surface 2a, and a plurality of terminals 3 mounted on the insulating housing 2 at a predetermined pitch P along a longitudinal direction of the card slot 4. The contact part 11 of the spring beam 10 of each terminal 3 is inserted into the card slot 4.
In the electrical connector 1 which faces from the upper and lower sides, a row in which two contact portions 11 face above and below the card slot 4 and one contact portion 11
Is facing the pitch 2P twice the pitch P,
An electrical connector, wherein the electrical connector is displaced by the pitch P.