JP2863079B2 - Pin header for printed circuit boards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for electrical connection between printed circuit boards, and more particularly to a pin header which is a male connector in which a large number of terminal pins are arranged in one or more rows in a horizontal direction.

[0002]

2. Description of the Related Art Recently, the number of poles for connecting printed circuit boards has been increasing more and more. In connection with this, terminal pins of a pin header which is a male side of a connector for a printed circuit board are connected to a first printed circuit board. There is a problem that cracks are generated in the solder fixed to the solder and lead to poor conduction. That is, for example, a printed circuit board used in a vehicle-mounted electronic device is exposed to a wide temperature change of -20 to 80 ° C., and accordingly, the printed circuit board and the base body of the pin header have respective thermal expansion coefficients. In this case, if the number of poles is large, the difference in the change in expansion and contraction between the printed circuit board and the pin header increases, and the stress applied to the solder increases. And finally leads to poor conduction.

Such a phenomenon rarely occurs if a plurality of pin headers having a small number of poles can be used in parallel, that is, if the pin header can be divided into a small number of poles and used. However, in the case of a pin header used to connect printed circuit boards with a large interval of, for example, about 5 cm, there is a problem in that if the pin header is taller, dividing it into smaller pieces causes a problem in strength and also makes it difficult to handle. In practice, it is difficult to achieve division. In other words, for pin headers for widely spaced substrates, a device is required to prevent cracks from occurring even with a large number of poles.

[0004] In addition, the pin headers for widely spaced substrates have the problem of thinning in addition to the problem of solder cracks. In other words, as the mounting density increases, connectors for printed circuit boards are also required to be made thinner.However, pin headers for widely spaced boards are tall because of their height. There is a problem that structural strength greater than that of a general connector for a printed circuit board is required, and there are many obstacles in reducing the thickness.

[0005] For example, the technology disclosed in Japanese Patent Publication No. 3-55953 or Japanese Patent Publication No. 4-29196 provides a certain improvement in the reduction in thickness. That is, in this technique, the required strength is maintained by forming the header housing (base body) holding the post contact (terminal pin) in a rectangular frame shape, and furthermore, the thickness is reduced to a certain extent. However, even in this technique, in order to maintain the required strength, the side columns and the post holding portions forming the four sides of the header housing need to be considerably thick, and this has a limit in reducing the thickness.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pin header for a printed circuit board, particularly a pin header for a board with a large interval, which can effectively prevent the occurrence of solder cracks even if the number of poles is large. Is to do so.

It is another object of the present invention to reduce the thickness of a pin header for a wide-spaced board.

[0008]

According to the present invention, in order to prevent solder cracks, a large number of terminal pins are held in a row or a plurality of rows in a resin base body, and one end of the terminal pins is connected to one end of the terminal pin. The printed circuit board pin header used for connecting the printed circuit boards by connecting the other end of the terminal pin to the connection hole of the first printed circuit board to the socket mounted on the second printed circuit board, respectively. In addition, slits extending inward from the end facing the first printed board to an appropriate depth in a direction substantially parallel to the terminal pins are provided at predetermined intervals.

By providing the slits in the base body in this manner, on the first printed circuit board side on which the terminal pins are fixed by soldering, a large number of terminal pins are substantially divided into a small number of terminal pin groups in accordance with the intervals of the slits. As a result, it is possible to obtain the same state as in the case of the partial division. As a result, it is possible to disperse the influence of expansion and contraction due to a temperature change, and to effectively prevent the occurrence of solder cracks.

According to the present invention, in a pin header for a printed circuit board having the above-described structure, a holding portion for holding a base body through an upper intermediate portion or a lower intermediate portion of a terminal pin is formed in a plate shape. And a slit is formed from the lower holding portion of the base body to the vicinity of the center of the board portion. That is, the flat board portion is used as a main structural strength element, and upper and lower holding portions for holding the terminal pins are provided at the upper and lower ends of the board portion. As a result, the terminal pin holding portion does not need to bear much structural strength, so that the size can be reduced and the overall thickness can be reduced.

Further, with respect to the pin header for a printed circuit board having such a structure, according to the present invention, a projecting piece projecting from between the terminal pins with a certain vertical width and having a height at least capable of isolating the terminal pins. Are formed on the side surface of the central portion of the board in a horizontal line.

According to this structure, it is possible to enhance the isolation between the terminal pins in portions other than the portion held by the upper holding portion and the lower holding portion. In other words, the intermediate portion of each terminal pin along the board part can be isolated from each other by the protruding piece, so if the part along the board part is bent for some reason, the contact with the adjacent terminal pin will not occur. It can be prevented by the projection piece. Further, according to this structure, the protruding piece also exerts a reinforcing rib function, and the strength of the board portion can be enhanced.

[0013]

An embodiment of the present invention will be described below. The pin header according to the present embodiment is a 42-pin type, and is shown in FIGS.
As shown in FIG. 2, the terminal pins 1, 1,... Arranged in two rows of 21 pins are held by the base body 2. As shown in FIG.

The base body 2 is provided with an upper holding part 4 and a lower holding part 5 at each of the upper and lower ends of the board part 3, and four side reinforcing parts 6, 6,... Further, two slits 7 are provided at a constant interval, in this example, an interval for grouping the terminal pins 1, 1,.

The board portion 3 is formed in a flat plate shape by using the main structural strength elements of the base body 2, and has a plurality of projecting pieces 8, 8,... ......
Are provided for each gap. The projecting pieces 8, 8, ...
Is a constant vertical width, in this example, 1 of the vertical width of the board portion 3
, Which have an upper / lower width of about / 15 and are held by upper and lower holding portions 4 and 5 described later and are along the board portion 3, the outer surfaces of the terminal pins 1, 1. Are protruded from the gaps between the terminal pins 1, 1,... So as to work to insulate the terminal pins 1, 1,.

The board 3 has projections 8, 8,...
... projecting pieces 8 between the row and the upper and lower holding portions 4 and 5
.., 9,... Having a vertical width of about the same degree and a height such that the upper surface thereof is in contact with the inner side surface of the terminal pin 1 are formed for reinforcement and for supporting the terminal pins.

The upper and lower holding portions 4 and 5 are for holding the terminal pins 1, 1,..., And have widths W ₄ and W ₅ (FIG. 2) which are several times as large as the board portion 3 respectively. , 5h, 5h,... (FIG. 3) by holding the upper intermediate portion and the lower intermediate portion of the terminal pins 1, 1,. As a result, the terminal pins 1, 1,... Are slightly floating from the side surfaces of the board portion 3.

The upper holding portion 4 is provided with guide posts 10 at the left and right ends thereof. The guide posts 10 and 10 are provided in a socket to be connected, that is, a socket mounted on a second printed circuit board (not shown) connected to the first printed circuit board (not shown) via the pin header. It functions as a connection guide of the pin header by fitting into the guide hole provided.

On the other hand, the lower holding portion 5 is provided with locking claws 11 for fixing the pin header to the first printed circuit board to which the pin header is directly connected, at each of the left and right ends thereof.

The side reinforcing portions 6, 6,... Are provided to reinforce the board portion 3. In order to save the amount of resin used, portions corresponding to the rows of the projecting pieces 8, 8,. The width is slightly smaller than the width of the upper holding portion 4.

The slit 7 is formed to have a length that traverses the lower holding portion 5 and reaches a lower side of the protruding piece 9 of the board portion 3. This slit 7 has seven terminal pins 1,
The group of 1,... Is to make the lower side of the terminal pins 1, 1,..., That is, the side connected to the first printed circuit board, independent of expansion and contraction due to a temperature change of the base body 2. Therefore, its width may be as small as necessary to mechanically separate the lower part of the base body 2.

[0022]

As described above, in the printed circuit board pin header according to the present invention, a large number of terminal pins are divided into a small number of terminal pin groups on the first printed circuit board side by providing slits in the base body. In this state, the effects of expansion and contraction due to temperature changes can be dispersed, and the occurrence of solder cracks can be effectively prevented. Further, the pin header for a printed circuit board according to the present invention has a base body formed by using a flat board portion as a main structural strength element. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view of a pin header for a printed circuit board according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA ₂ -SA ₂ in FIG. 1;

FIG. 3 is a perspective view of the pin header for the printed circuit board of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal pin 2 Base body 3 Board part 4 Upper holding part 5 Lower holding part 7 Slit 8 Projection piece

Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H01R 23/00-23/68

Claims (3)

(57) [Claims] A plurality of terminal pins are held in a row or a plurality of rows in a resin base body, and one end of the terminal pins is connected to a connection hole of a first printed circuit board, and the other end of the terminal pins is connected to the other. In a printed circuit board pin header used for connecting the printed circuit boards by connecting the end sides to sockets mounted on the second printed circuit board, respectively, the first printed circuit board is disposed on the base body in a direction substantially parallel to the terminal pins. Characterized in that slits extending inward from the end on the opposite side to an appropriate depth at predetermined intervals are provided at predetermined intervals. 2. The base body is provided with holding portions for penetrating and holding an upper intermediate portion or a lower intermediate portion of a terminal pin at upper and lower ends of a flat board portion, respectively. 2. The pin header for a printed circuit board according to claim 1, wherein a slit is formed from the holding section to the vicinity of the center of the board section. 3. A method according to claim 1, wherein the projecting pieces having a certain vertical width and projecting from between the terminal pins at a height capable of isolating at least the terminal pins are formed in a horizontal line on the side surface of the central portion of the board portion. Item 2. A printed circuit board pin header according to item 2.