JPH0350637Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a connector used to mount elements and components such as ICs (integrated circuits) on printed circuit boards.

"Conventional technology" IC used to mount IC on printed circuit board
A type of socket that allows the terminal pins (leads) of an IC to be inserted in the axial direction and directly contact the socket contacts with a predetermined contact force, as shown in Figure 5. .

That is, a groove 1a is formed facing the upper surface of the insulator 1, and a socket contact 2 is loaded into this groove 1a. The socket contact 2 includes a portion 2a that extends in the insertion direction of the terminal pin 3 of the IC inserted into the groove 1a, a portion 2b that guides the terminal pin 3 above the portion 2a to the portion 2a, and a portion 2b that is bent from the lower end of the portion 2a. a portion 2c that extends diagonally upward, a portion 2d that is bent from the upper end of the portion 2c and guides the terminal pin 3 to the portion 2a, and presses the terminal pin 3 against the portion 2a with its tip; and a portion 2d that extends from the side of the portion 2a. It extends downward, is fitted into the lower part of the groove 1a and is exposed to the outside of the insulator 1, and has a portion 2e (not shown) that is inserted into a through hole of the printed circuit board and soldered to a pad on the printed circuit board. and the terminal pin 3 is guided by parts 2b and 2d,
It is inserted along the section 2a between the tips of the sections 2a and 2d and connected to the socket contact 2.

``Problems to be solved by the invention'' However, in the conventional IC socket shown in FIG. 5, the socket contact 2 is loaded into the groove 1a from the top side of the insulator 1, so When the terminal pin 3 is removed from the connector, the portion 2d of the socket contact 2 that presses the terminal pin 3 may curl up and pop out from the insulator 1, as shown in FIG.

Therefore, this idea was developed to solve the problem that, in connectors used to mount elements and components such as ICs on printed circuit boards, when the terminal pins of the elements or components are removed from the connector, the part of the socket contact that presses the terminal pins may curl up. This is to prevent it from sticking out of the insulator.

"Means for Solving the Problem" In this invention, the insulator is formed with an opening facing on one side and having a guide portion for the terminal pin, and facing on the opposite side with the opening on the one side. The socket contact is loaded into the insulator from the opposite side and guides a terminal pin inserted into the insulator through the opening on the first side. , a guide part whose width at least on the terminal pin insertion side is larger than the width at the position of the guide part of the opening on the one side, and a pair of opposing contact parts that sandwich the terminal pin guided by the guide part. shaped into a shape.

"Function" In the connector of this invention configured as described above, when the terminal pin of an element or component such as an IC is removed from the connector, the part that presses the terminal pin having the guide part of the socket contact and the contact part. is locked to the side wall at the guide part of the opening on one side of the insulator, so when the terminal pin is removed from the connector, the part of the socket contact that presses the terminal pin will curl up and pop out from the insulator. It won't happen.

``Example'' Figure 1 shows an example of the connector of this invention.
FIG. 2 is a partial cross-sectional view showing a state in which an IC is mounted on a printed circuit board, FIG. 2 is a plan view of a portion of the connector of the same example, and FIG. 3 is a cross-sectional view taken along the line - in FIG. 2.

The connector includes an insulator 10 and a socket contact 20
Consisting of

The insulator 10 has a wall surface 1 facing the upper surface 10a.
1a, wall surfaces 1 facing each other perpendicular to the wall surface 11a;
2a, 13a, a wall surface 14 facing the wall surface 11a,
And by the wall surface 14 side portions of wall surfaces 12b and 13b facing in the opposite direction of wall surfaces 12a and 13a at an interval larger than the interval between wall surfaces 12a and 13a,
A substantially rectangular opening 15 is formed, facing the lower surface 10b, and facing the wall surfaces 16x, 16y, and wall surface 12b on the side surface 10c side of the insulator 10 in the opposite direction of the wall surfaces 12a, 13a at an interval equal to the distance between the wall surfaces 12a, 13a. , 13b, wall surface 14, etc.,
A substantially rectangular opening 17 larger than the opening 15 is formed, communicating with the opening 15 on the upper surface 10a side, and facing the side surface 10c and the upper surface 10a, wall surfaces 16x, 16y, and a wall 18 perpendicular to the wall surfaces 16x, 16y; An opening 19 communicating with the opening 17 on the lower surface 10b side is formed by the wall surfaces 12b, 13b, etc. The opening 15 includes the upper part of the wall surface 11a, the wall surface 1
A guide portion 15a for the terminal pin 40 of the IC 30 is formed by the upper portion of the wall surface 11a side of the guide portion 2a and the slope of the upper portion of the wall surface 13a on the wall surface 11a side. opening 1
5, 17 and 19 are terminal pins 40 of IC30
It is formed by an array according to the array of.

The socket contact 20 is formed by bending a branch obtained by punching out a metal plate. That is, as shown in Figure 4, the branch is
Consisting of one half 21, another half 25 located on an extension line of one half 21, and a connecting portion 29 between one half 21 and other half 25, for example, the other half 25 of one half 21
A slit 22a is formed at the end 22 on the opposite side to the tip and penetrates in the thickness direction, and a protrusion 23 protrudes in the width direction at the center 23 of the half part 21.
a is formed, a protrusion 27a protruding in the width direction is formed in the center 27 of the other half 25, and the width of the end 28 of the other half 25 on the side opposite to the one half 21 side is widened. Then, the connecting portion 29 is bent at right angles to the one half 21 and the other half 25, and the one half 21
The end portion 22 and the center portion 23 are bent at a right angle to the end portion 24 on the other half 25 side, the end portion 22 is bent at a right angle to the center portion 23, and the end portion 2
4 is bent into a semicircular shape to form a contact portion 24.
a is formed, the end 26 of the other half 25 on the one half 21 side is bent at a right angle at the center, the center 27 is curved, and the end 28 is bent at the tip side to form a contact facing the contact part 24a. A portion 28a and a guide portion 28b are formed.

The socket contact 20 formed in this way is
The end portion 22 of the one-half portion 21 is inserted into the insulator 10 from the lower surface 10b side of the insulator 10 between the wall surfaces 16x and 16y to face the upper surface 10a of the insulator 10, and the center portion 23 of the one-half portion 21 is inserted into the opening 19. The connection part 29 is press-fitted into the wide part on the wall surface 18 side of the wall surface 18.
b, and the center portion 2 of the end portion 26 of the other half portion 25
7 side and the end 26 side of the center part 27 are press-fitted into the wide part of the wall surface 14 side of the opening 15, and the other half part 2
The end portion 28 side of the central portion 27 of 5 is the wall surface 12a, 13
The end portion 24 having the contact portion 24a of the one half portion 21 and the end portion 28 having the contact portion 28a and the guide portion 28b of the other half portion 25 are inserted between the walls 12b, 1
It is loaded by being inserted between 3b.

The connector configured as described above is arranged on the side 50b of the printed circuit board 50 opposite to the side 50a on which the IC 30 is mounted, as shown in FIG.
Surface 50 of printed circuit board 50 of socket contact 20
The end 22 along line b is the surface 50b of the printed circuit board 50.
It is attached to the surface 50b side of the printed circuit board 50 by being soldered to the pad 51 formed above. And the terminal pin 40 of IC30 is
Through hole 52 formed in printed circuit board 50
is inserted from the surface 50a side, guided by the guide part 15a of the insulator 10, inserted into the opening 15, guided by the guide part 28b of the socket contactor 20, penetrates between the contact parts 24a and 28a, and is inserted into the contact part 24a. ,28
The IC 30 is mounted on the printed circuit board 50 by being sandwiched by the contacts 1 and 2 and connected to the socket contact 20.

From this state, when the terminal pin 40 of the IC 30 is removed from the connector and the IC 30 is removed from the printed circuit board 50, the width of the end 28 that presses the terminal pin 40 of the socket contact 20 against the contact portion 24a is the same as the upper surface of the insulator 10. Guide part 15 of opening 15 on 10a side
The width of the end portion 28 is larger than the width of the portion directly below the guide portion 15a of the opening 15, and the end portion 28 is locked to the side wall of the portion of the opening 15 directly below the guide portion 15a. It will not jump out from the insulator 10.

Note that the entire width of the end portion 28 including the contact portion 28a and the guide portion 28b is not widened, and the guide portion 28
The width of only the portion b or the width of only the upper portion of the guide portion 28b may be increased.

In addition, the printed circuit board 50 of the socket contactor 20
The end portion 22 to be attached to the IC 3 of the printed circuit board 50 is inserted into a through hole 53 formed in the printed circuit board 50 perpendicular to the printed circuit board 50 as shown by the two-dot chain line in FIG.
It may be soldered to a pad formed on the surface 50a on which the 0 is mounted.

"Effect of the invention" According to the connector of this invention, when the terminal pin of an element or component such as an IC is removed from the connector, the part of the socket contact that presses the terminal pin will curl up and pop out from the insulator. There is no.

[Brief explanation of the drawing]

Figure 1 shows an example of the connector of this invention.
Figure 2 is a partial cross-sectional view showing the IC mounted on a printed circuit board, Figure 2 is a plan view of a portion of the same example connector, Figure 3 is a cross-sectional view along the - line in Figure 2, Figure 4
The figure is a plan view showing the branch shape of the socket contact of the same example connector, Figure 5 is a cross-sectional view showing an example of a conventional connector, and Figure 6 is a cross-sectional view showing the state when the terminal pin is removed from the connector. It is a diagram.

Claims (1)

[Claims for Utility Model Registration] An insulator having an opening facing one side and having a guide portion for a terminal pin, and an insulator having an opening facing the opposite side and communicating with the opening on the one side; This insulator is loaded from the side opposite to the above,
a guide portion that guides a terminal pin inserted into the insulator from the opening on the one side, the width of at least the terminal pin insertion side being larger than the width of the opening on the one side at the position of the guide portion; A connector comprising: a socket contactor having a pair of opposing contact portions that sandwich a terminal pin guided by the portions;