JPH0421271Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a printed circuit board connector used for mounting another printed circuit board on one printed circuit board and making an electrical connection between the two circuit boards.
More specifically, the present invention relates to a surface mount type printed circuit board connector that allows the above connection to be made on the surface of the printed circuit board.

(Prior art) As a connector used for printed circuit boards, the 6th
As shown in the figure, many types have been used in the past, in which a through hole 2 is formed in the printed circuit board 1, a conductive material layer 2a is formed around the through hole 2, and the legs of the connector are inserted into the through hole 2. It is being However, with this type, there is a problem that the diameter of the through holes 2 cannot be made very small due to problems such as the strength of the legs of the connector, and the intervals between the through holes 2 cannot be made very small. For this reason,
With the miniaturization of electronic equipment, there has been a problem in that it is difficult to meet the demand for smaller and more densely packaged circuit devices arranged inside the equipment with through-hole types.

For this reason, as shown in FIG. 7, lands 3 are formed on the surface of the printed circuit board 1 to connect circuit elements and connectors to each other.
A surf-s mount type was devised in which the legs of the connector were directly joined by soldering or the like.

This surface mounting method is often used to connect printed boards to each other (for example, to connect a motherboard and a daughter board). To give an example, as shown in FIG. 8, a post header 5 having a post 5a is fixed on the motherboard 4, a connector 6 fixed on the daughter board 7 is fitted into the post header 5, and the connector 6 is attached to the motherboard 4. There is one in which a daughter board 7 is attached. In this case, when the connector 6 is fitted into the post header 5, the post 5
A receptacle 6a that fits into the receptacle 6a is built in, and the tip of a leg 6b connected to the receptacle 6a is soldered to a land 7a of the daughter board 7.

(Problem to be solved by the invention) When the motherboard 4 and daughter board 7 are connected in this way, both boards 4,
7 is firmly connected via the header 5 and connector 6, so if the boards 4 and 7 are warped, or thermal distortion occurs due to the heat of soldering, or when the board is used, When distortion occurs due to heat due to electrical resistance, etc., the warpage, distortion, etc. cannot be released, and there is a risk that stress may be generated in the connection portion between both boards 4 and 7. Therefore, this stress acts on the connection between the land 7a of the daughter board 7 and the leg 6b of the receptacle 6a, and this connection (surf S mount)
Since this type has a weaker degree of hollowness than the through-hole type, there is a risk that the connection may come loose.

Furthermore, as the mounting density of electronic components on printed circuit boards (mother board 4, daughter board 7) increases and the number of connections using connectors increases, for example, lands 7a are provided on both sides of daughter board 7. Ru. in this case,
The legs 6b are joined to the lands 7a on both sides, and the connector 6
However, this requires a large mounting area for the connector 6 and the post header 5 on the motherboard 4, which increases the mounting distance between the daughter boards 7 and prevents high-density mounting of the daughter boards. This is a contributing factor.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problem of stress generation at the connection part of the printed circuit board in the conventional connector, and also to enable higher density mounting of the printed circuit board. As a means for that purpose, the printed circuit board connector of the present invention is constructed as follows.

That is, this connector consists of an insulating housing and a plurality of contacts, and the housing is formed with a holding groove into which the printed circuit board is inserted, and is also provided with holding means for fixing and holding the printed circuit board inserted into the holding groove. The plurality of contacts are divided into both sides of the holding groove and stored and held in the housing, and the contact portions of the contacts protrude outward from both sides across the holding groove, and the printed circuit board is placed in the holding groove. When inserted, the electrode portion and the contact portion on the surface of the printed circuit board come into elastic contact with each other.

The holding means includes a male pin member and a female pin member inserted from both ends of a through hole formed in the housing across the holding groove, and holds the male pin member and the female pin member. The printed circuit board inserted into the groove is inserted through the through hole, and the fitting protrusion at the tip of the male pin member is fitted into the fitting hole at the tip of the female pin member to engage both pin members, and the housing is inserted. Preferably, the printing substrate is configured to be fixedly held.

(Function) When using the above printed board connector, the printed board is inserted into the holding groove of the insulating housing and is fixedly held by the holding means. At this time, the contact parts of the contacts, which are divided into both sides of the retaining groove and held in the housing, protrude outward to sandwich the retaining groove, so that each contact part is connected to the printed circuit board inserted into the retaining groove. The contact elastically contacts the electrode parts (lands) on both sides of the contact, and each contact and the electrode part are connected. In this case, since the connection between the electrode section of the printed circuit board and the contact section of the contact is an elastic abutting contact, the problem of stress generation due to warpage, distortion, etc. of the printed circuit board does not occur in this connection section. Further, in this connector, a plurality of contacts can be brought into abutting contact with the electrode portions on both sides of the printed circuit board, so that the connector can be made smaller and the printed circuit boards can be mounted with higher density.

Incidentally, if the printed circuit board inserted into the holding groove is fixedly held by male and female pin members, it is possible to securely fix and hold it by the pin member having a simple structure.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIGS. 1A to 1C are a plan view, a front view, and a right side view showing a printed circuit board connector according to the present invention. This connector includes a housing 10 made of an insulating material, a plurality of contacts 20 housed and held in line within the housing 10, and female pins 30 and male pins 35 for fixing and holding a printed circuit board inserted into the housing 10. It consists of. The housing 10 has front end protrusions 12, 12 that protrude forward on both sides of its front end, and engaging protrusions 11, 11 that protrude left and right on the left and right side surfaces, and when a connector having this housing 10 is attached to a post header. , the front end protrusions 12, 12 position the post header, and the engagement protrusions engage the post header. The housing 10 is further formed with a holding groove 13 extending in the transverse direction on its rear end surface, and the housing 10 holds a printed circuit board inserted into the holding groove 13.

FIG. 2 is a cross-section of this connector taken along the arrow - in FIG. 1B to show the contacts 20 housed and held within the housing 10. As can be seen from this figure, the housing 10 has a plurality of storage chambers 15, 15, ... 15 extending through the front and back,
The contacts 20 are housed and held in the housing chambers 15, 15, . . . 15, respectively. In the connector of this example, storage chambers 15 are formed in four rows vertically, and a terminal portion 21 for receiving a mating terminal is inserted into each storage chamber 15 from the rear end 15a toward the front end side. The front end of the terminal portion 21 faces the front end opening 15b of each storage chamber 15. This terminal portion 21 has two leaves 21a, 2 facing each other vertically.
1b, and as shown in FIG. 4, which is a sectional view taken along the arrow -, leaves 21a,
21b holds an internal protrusion 15c protruding inward from the side wall of the storage chamber 15, so that the leaves 21a and 21b face each other at a predetermined interval, and the mating terminal inserted from the front end opening 15b is attached to the leaf. 2
It is designed so that it can be easily inserted between 1a and 21b. Note that this internal protrusion 15c is connected to the leaf 21a,
It also plays the role of centering 21b.

A contact portion 2 formed at the rear of each contact 20 stored and held in each storage chamber 15 in this manner.
2 protrudes rearward so as to sandwich the above-mentioned holding groove 13 from both sides. Note that the two contacts 20 stored and held in the two upper storage chambers 15 are placed between the two lower storage chambers 1 with the holding groove 13 in between from above.
The two contacts 20 housed and held in the upper part 5 sandwich the holding groove 13 from below, but the contact portions 22 of the two upper contacts 20 are located horizontally shifted by one pitch, and the contact portions No comradely contact occurs. Furthermore, the contact portions 22 of the two lower contacts 20 are also connected to each other in the same way.
Only the pitch is off. Therefore, when the printed circuit board 40 is housed and held in the holding groove 13 as shown by the two-dot chain line in the figure, the contact portions 22 of each contact 20 are elastically deformed and clamp the printed circuit board 40 from both sides. , each contact portion 22 comes into abutting contact with an electrode portion (land) on the surface of the printed circuit board 40 due to its elastic force, so that each contact 20 and the printed circuit board 4
An electrical connection is made with the electrode section 0. By making the electrical connection through contact using such elastic force, the problem of generation of stress at the connecting portion, which has been a problem in the past, does not occur.

It should be noted that simply inserting the printed circuit board 40 into the holding groove 13 does not sufficiently hold the printed circuit board;
Furthermore, it is difficult to position the printed board with respect to the connector sufficiently. Therefore, as shown in FIG. 3, which shows a cross section taken along the arrow - in FIG. A pair of each are provided on the left and right sides of 10. These male and female pins 30, 35 are inserted from the upper and lower ends into a first through hole 16 that passes through the housing 10 across the holding groove 13. Further, the printed circuit board 40 is formed with a second through hole 41 that matches the first through hole 16 when the printed circuit board 40 is inserted into the holding groove 13 . Further, a fitting hole 31 is formed at the tip (lower end) of the female pin 30, and a fitting protrusion 36 that fits into the fitting hole 31 is formed at the tip (upper end) of the male pin 35. . Therefore, after inserting the printed circuit board 40 into the holding groove 13, the female and male pins 30, 35 are pushed into the first through hole 16, both pins 30, 35 are inserted into the second through hole 41, and the male pin 35 and the fitting hole 31 of the female pin 30 are fitted, and the printed circuit board 41 is fixed to the housing 10. At this time, the fitting protrusion 36 of the male pin 35 has a ring-shaped protrusion 3 in its middle part.
6a is formed, and this ring-shaped projection ensures reliable fitting between the fitting projection 36 and the fitting hole 31. Note that this fixing allows the print board 4 to
0 with respect to the housing 10. In this way, the print board holding means can be constructed with a simple structure using the male and female pins 30 and 35.

Next, FIG. 5 shows a state in which the connector configured as described above is attached to the post header 50. As you can see from this diagram, the post header 50
When the connector is inserted into the insertion hole of the connector, the post terminals 51, 51, . Electrical connection is made between each contact 20 and the post terminal 51. Incidentally, by attaching the post header 50 to the mother print board, the mother print board and the daughter print board can be connected to each other. In this case, one connector is used to connect the electrode portions on both sides of the daughter print board 40. This allows for high-density mounting of printed circuit boards.

(Effects of the invention) As explained above, according to the invention, the contact portions of the contacts, which are divided into both sides of the holding groove and stored and held in the housing, protrude outward so as to sandwich the holding groove. When the printed board is inserted into the holding groove, each contact part comes into elastic contact with the electrode parts (lands) on both sides of the printed board inserted into the holding groove, and each contact and the electrode part are connected. Therefore, the problem of generation of stress due to warpage, distortion, etc. of the printed board does not occur. Further, in this connector, a plurality of contacts can be brought into abutting contact with the electrode portions on both sides of the printed circuit board, so that the connector can be made smaller and the printed circuit boards can be mounted with higher density.

[Brief explanation of drawings]

1A to 1C are plan views, front views, and side views showing the printed circuit board connector according to the present invention, and FIGS. 2 to 4 are cross sections of the printed circuit board connector along the arrows -, -, and -. 5 is a sectional view showing the connector attached to a post header, FIGS. 6 and 7 are perspective views showing a conventional printed circuit board,
FIG. 8 is a sectional view showing a conventional printed circuit board connector. 10...Insulating housing, 15...Storage chamber, 1
3...Retention groove, 20...Contact, 21...Terminal section, 22...Contact section, 30...Female pin, 35...
...Male pin, 40...Printed base.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of contacts each having a terminal portion connected to a mating terminal at one end and a contact portion elastically abutting an electrode portion on the surface of a printed circuit board at the other end;
A printed circuit board connector comprising an insulating housing for storing and holding the contact, wherein the housing has a holding groove into which the printed circuit board is inserted, and a holding means for fixing and holding the printed circuit board inserted into the holding groove. The plurality of contacts are divided into both sides of the holding groove and stored and held in the housing, and the contact portions of the contacts protrude outward from both sides so as to sandwich the holding groove. . A connector for a printed circuit board, characterized in that when the printed circuit board is inserted into the holding groove, the electrode section on the surface of the printed circuit board and the contact section come into elastic abutting contact. 2. The holding means is composed of a male pin member and a female pin member inserted from both ends of a through hole formed in the housing across the holding groove, and the male pin member and the female pin member are The printed circuit board inserted into the holding groove is inserted through the through hole, and the fitting protrusion at the tip of the male pin member is fitted into the fitting hole at the tip of the female pin member, so that both pin members are engaged. The connector according to claim 1, wherein the printed circuit board is fixedly held in the holding groove.