JPH0116299Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention is a connector equipped with a large number of male terminals that are inserted into through-holes of a printed wiring board, and is particularly suitable for use with printed wiring boards such as ICs. The present invention relates to a connector temporary fixing mechanism that is suitably implemented when a connector is subjected to soldering.

(2) Conventional technology and its problems Conventionally, as shown in Fig. 1, a connector mounted on a printed wiring board such as an IC socket has its male terminal 4 inserted into a through hole 6 of a printed wiring board 5 with some play. A connecting means is adopted in which the through hole 6 is filled with solder by applying the solder to an automatic solder tank above and solidifying the solder.

The male terminal 4 extends integrally from the female contact 3 housed in the contact receiving hole 2 of the connector board 1, projects downward from the connector board 1, and penetrates into the through hole 4.

As mentioned above, the connector mounted on the printed wiring board has looseness, tilting,
be placed in a situation where withdrawal is likely to occur;

As a means to prevent the connector mounted on the printed wiring board from wobbling or coming off, a special temporary fixing part may be attached, for example, a temporary fixing mechanism using screws or nuts, but the mounting space for the screw fixation may be It takes a lot of parts, and in addition to being inferior in workability, the unit cost of parts is high. In addition, in the case of a mechanism in which a locking claw is integrally provided from the connector base, inserted into the through hole 6, and hooked to the edge of the hole, not only does it take up space, but it also cannot accommodate changes in the thickness of the printed wiring board. However, there are drawbacks such as the need to provide a dedicated mounting hole for inserting the mounting claw.

Furthermore, a mechanism in which a spring piece or the like is inserted into a through hole and comes into elastic frictional contact with the inner wall of the hole tends to come off easily, making it difficult to apply to thin printed wiring boards.

(3) Purpose of the invention Therefore, the present invention provides a connector equipped with a large number of male terminals inserted into the through holes of the printed wiring board, which does not require any special work on the connector base, and which does not require separate parts. Simply insert the male terminal of the connector into the printed wiring board without
The correct half-shaped male terminal and the reverse half-shaped male terminal work together to elastically hold the edge of the through-hole, achieving accurate temporary fixing of the connector, and can temporarily fix the connector by following the thickness of the printed wiring board. The Company provides connectors mounted on printed wiring boards.

(4) Structure of the invention In order to achieve the above-mentioned purpose, the present invention provides a connector mounted on a printed wiring board with a male terminal bent in a normal square shape and a male terminal bent in an inverse dogleg shape. The above positive and reverse dogleg shaped male terminals are arranged symmetrically with respect to each other, and the bent tops of both doglegged male terminals are formed at positions that penetrate the through hole, and the dogleg shaped bent tops are the openings at the bottom of the through hole. The slope of the upper inclined piece of the double-sided male terminal is elastically locked to the lower opening edge of the double-sided male terminal at the insertion position where the double-sided male terminal elastically returns to its original state after overcoming the edge, thereby achieving temporary fixation. Features.

(5) Embodiments of the invention The present invention will be described in detail below based on the embodiments shown in FIGS. 2 to 7.

In the figure, 11 is a connector board, and 15 is a printed wiring board. The following male terminal 14 is provided to be inserted into a through hole 16 of a printed wiring board 15 projecting downward.

The male terminal 14 is made of a flat strip, which is bent along transverse fold lines to form a normal square-shaped male terminal 14A and an inverted dogleg-shaped male terminal 14B, which will be described below.

2 to 4 show a first embodiment thereof.

A rectangular base 1 that constitutes a connector as shown
Two parallel rows of male terminals 14 are protruded from the lower surface of the first row, and the male terminals 14 in both rows are bent inward or outward along the fold line in the width direction so that the male terminals 14 in both rows are symmetrical to each other. Connect the male terminal to the correct square-shaped male terminal 1.
4A, and the male terminals in the other row are inverted dogleg-shaped male terminals 14B.

Preferably, the male terminals in each row are bent inward of both rows (in the direction between the rows) as shown in the figure, to form the positive and reverse dogleg-shaped male terminals 14A and 14B in the symmetrical arrangement.

The doglegged male terminals 14A, 14B have an upper inclined piece 14a, which is one piece of the doglegged bent piece, and a lower inclined piece 14b, which is the other piece, as described above.
It has a bent top 14c which is a watershed between 4a and 14b.

Then, the doglegged bent top portion 14c is placed at a position passing through the through hole 16 of the printed wiring board 15, and as shown in FIG.
The double-sided doglegged male terminal 14 is at the insertion position where c crosses the lower opening edge 16a of the through-hole 16 and the double-sided doglegged male terminals 14A, 14B are elastically restored.
The inclined surfaces of the upper inclined pieces 14a of A and 14B are elastically engaged with the lower opening edge 16a for temporary fixation.

As shown in FIG. 4, the conditions for obtaining the above results are as shown in FIG. If the inner dimension of the through hole 16 into which the male terminal 14A is inserted and the other through hole 16 into which the inverted dogleg-shaped male terminal 14B is inserted is defined as the interval B, then both the intervals B and B' are B.
＞B′. Naturally, the free end of the lower inclined piece 14b is arranged to lie within the diameter of the through hole 16, but preferably the lower inclined piece 1 of the double-sided male terminals 14A, 14B is
4b is the distance between the centers, and when the distance between the centers of the through holes 16 into which the doglegged male terminals 14A and 14B are inserted is the distance A, the distances A and A' are A= Set so that the relationship is A′.

Further, the thickness of the printed wiring board 15 is assumed to be H, and the height of the effective insertion margin of the upper inclined piece 14a from the bent top part 14 of the doglegged male terminals 14A, 14B is
In the case of H', the thickness H and the height H' are set so that the relationship H<H' holds.

As a result of the above, first, the lower inclined piece 14b functions as an introduction guide piece, and the dogleg-shaped male terminals 14A, 1
4B into the through hole 16 smoothly, and as the insertion progresses, the slope of the lower inclined piece 14b slides on the upper opening edge of the through hole 16.
While displacing the male terminals 14A and 14B outward against their elasticity, bend the top portion 14c and insert it into the through hole 16.
Introduce it within. Furthermore, the bent top portion 14c is the male terminal 1.
The bullets 4A and 14B reach the outlet of the through hole while being pressed against the inner wall of the through hole 16 due to their elasticity, and pass over the lower opening edge 16a of the through hole 16.

As a result, the dogleg-shaped male terminals 14A, 14B elastically restore inward, the bent top 14c is displaced to the outer area of the through hole 16 (within the above-mentioned interval B), and the bent top 14c is displaced to the upper slope near the bent top 14c, that is, the upper slope. Piece 1
The lower end slope of 4a comes into elastic contact with the lower opening edge of the through hole 16. As a result, both dogleg-shaped male terminals 1
4A and 14B, that is, a holding effect is obtained, and the connector base 11 is stably attached to the printed wiring board 15 without any horizontal or vertical play (play).

The through hole 16 of the printed wiring board 15 is a circular hole, whereas the male terminals 14A and 14B are flat strips, so the left and right edges of the inclined surface of the flat strip (male terminal) are aligned with the circular hole (through hole). Since the edges come into pressure contact with each other, the engagement effect becomes more effective as the edges come into contact with each other.

Figure 5A shows an example in which the male terminal 14 is simply bent in a dogleg shape to form a positive and reverse dogleg shaped male terminal, while Figures B and C in the same figure show an example in which the male terminal 14 is bent in a dogleg shape. In addition, directly above the bent top portion 14c, that is, the upper inclined piece 1
A pair of protrusions 14e or stepped portions 14d are provided on the left and right edges (thick plate parts) of the lower end of the male terminal 4a, and the protrusions 14e
Alternatively, an embodiment is shown in which the stepped portion 14d is hooked onto the edge of the through hole 16 to strengthen the temporary fixing.

Further, FIGS. 6 and 7 show other embodiments, in which a row of male terminals 14 includes a normal square-shaped male terminal 14A and an inverted dogleg-shaped male terminal 14B.

Although this concept is effective for temporarily fixing a single line type connector as shown in the figure, it may also be applied to a multiline type connector (two rows of male terminals).

According to the above embodiment, as shown in FIG. 7, for example, when a normal square-shaped male terminal 14A is elastically locked to one hole edge 16a with the center line X of a certain through hole as a boundary, The shaped male terminal 14B is elastically locked to the other hole edge 16a' in another through hole on the same line.

In the embodiment, positive and reverse dogleg-shaped male terminals 14A, 1
4B are arranged alternately (periodically alternating) to obtain the above-mentioned alternate locking effect.

(6) Effects of the invention According to the invention, the lower inclined pieces 14b of the male terminals 14A and 14B, which have a normal square shape and a reverse dogleg shape, serve as guides when inserting the connector, and the male terminals 14a and 14b, which have a normal square shape and a reverse dogleg shape, serve as guides when inserting the connector into the through hole 16. This enables smooth introduction of the bent top portion 14c. As the insertion further progresses, elastic engagement by the inclined surface of the upper inclined piece 14a is automatically obtained at a position where the bent top part 14c passes over the lower opening edge of the through hole, and the connector base 11
securely held on the printed wiring board,
Demonstrates temporary fixing effect.

According to the present invention, the play in the vertical direction and the play in the left and right front and rear directions of the connector base 11 is well absorbed, preventing play in the same direction, and temporarily fixing the connector base 11 to the printed wiring board in an extremely stable and static state. be able to.

Further, according to the present invention, the purpose of temporary fixing can be achieved without attaching temporary fixing parts to the connector base, and no space is required for temporary fixing, and temporary fixing can be achieved at the same time by simply pushing the connector. It has practical advantages such as being able to be used immediately for soldering. Furthermore, according to the present invention, it is possible to deal with the thickness of printed wiring boards, and even when the thickness changes, the
The play-absorbing effect of the inverted dogleg-shaped male terminal enables temporary fixing without the play.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional printed wiring board mounted connector, and FIG. 2 and subsequent figures show embodiments of the present invention.
The figure is a perspective view showing the printed wiring board and the connector before being attached to the board, Figure 3 is a sectional view showing the connector attached to the printed wiring board and temporarily secured, Figure 4 is the front view of the connector, 5 is a side view illustrating the dimension setting of the inverted dogleg-shaped male terminal and the through hole of the printed wiring board by taking a cross section of the printed wiring board;
Figures A, B, and C are front views showing modified examples of the above dogleg-shaped male terminal, Figure 6 is a perspective view of the connector showing the second embodiment, and Figure 7 is a temporary view of the connector mounted on a printed wiring board. It is a sectional view showing a stopped state. 11... Connector board, 14... Male terminal, 14
A... Correct dogleg shaped male terminal, 14B... Inverted dogleg shaped male terminal, 14a... Upper inclined piece, 14b... Lower inclined piece, 14c... Dogleg shaped bent top, 15...
Printed wiring board, 16...Through hole.

Claims (1)

[Scope of utility model registration request] It is a connector equipped with a large number of male terminals that are inserted into through holes of a printed wiring board, and the male terminals include a male terminal bent in a normal square shape and a male terminal bent in a reverse dogleg shape. the above-mentioned normal double-shaped male terminal and the reverse half-shaped male terminal are arranged symmetrically, and the bent tops of the above-mentioned inclined piece and the lower inclined piece of the double-sided square male terminal are positioned to pass through the above-mentioned through hole. The slope of the upper inclined piece of the dogleg-shaped male terminal is inserted into the lower opening at the insertion position where the dogleg-shaped bent top crosses over the lower opening edge of the through-hole and the dogleg-shaped male terminal elastically restores its shape. A printed wiring board mounting connector characterized by having a structure that is elastically engaged with the edge for temporary fixation.