JPH10223284A - Connector terminal structure for printed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the connector terminal structure for a printed board, capable of taking out a connector terminal upwards from the printed board with stress relaxation countermeasure applied and with less components. SOLUTION: In a connector terminal 5 in which its lower end 5i is inserted from the upper part into a through-hole 6a of a printed board 6 and soldered, a male terminal part 5c which is formed in the thickness capable of fitting to a mating female terminal by folding up the upper part of a thin plate is formed in the terminal 5, and a stress relaxation part 5h bent outward is formed in the lower part 5b of the thin plate. A connector housing 9 is formed integrally in a case 8 for housing the printed board 6, a through-hole 9b which is capable of inserting the terminal 5 from the outside is formed in the connector housing 9, the terminal 5 is inserted into the through-hole 9b from the lower end part 5i, inserted into the through-hole 6a of the printed board 6. At the same time, the male terminal part 5c is forced to be inserted into the through-hole 9b of the male terminal part 5c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector terminal structure for a printed circuit board capable of taking out a connector terminal to a printed circuit board with a small number of parts while taking measures for stress relaxation.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electrical components has a branch connection point concentrated in one place, and the wiring is rationally and economically branched. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0003] In the case of the electric junction box as described above,
A printed circuit board on which electronic components and the like are mounted is housed, and FIG.
As shown in FIG. 1A, a connector terminal 2 of a connector 3 installed on a printed circuit board 1 is soldered by inserting a lower end 2a from above into a through hole 1a of the printed circuit board 1. .

However, the expansion and contraction of the connector 3 at the time of temperature change is transmitted to the terminal 2 and acts as a stress on a soldered portion of the terminal 2 to easily cause a solder crack. For this reason, as shown in FIG. 3A, a laterally extending connector for projecting a connector terminal laterally with respect to the printed circuit board 1 is used, and an inverted L-shaped terminal portion between the connector 3 and the printed circuit board 1 is used as a stress relief portion. What is said to be the mainstream.

[0005]

However, in the case of the horizontal connector, the direction of connection with the mating connector is restricted, and the connector housing to be disposed on the printed circuit board is required as a separate component. Cost increases.

As shown in FIGS. 3 (B) and 3 (C), there has been proposed a connector in which a connector terminal 2 having a stress relaxation portion 2b is projected upward with respect to a printed board 1. (See Japanese Utility Model Application Publication No. 60-181867), a female terminal structure that cannot process the female terminal portion 2c with a thin plate, and a connector housing as a separate component is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has been made for a printed circuit board capable of projecting a connector terminal upward to the printed circuit board with a small number of parts while taking measures for stress relaxation. An object of the present invention is to provide a connector terminal structure.

[0008]

According to the present invention, there is provided a connector terminal for soldering by inserting a lower end from above into a through hole of a printed circuit board and soldering the terminal. The upper portion of the thin plate is folded to form a male terminal portion having a thickness that can be fitted into the female terminal of the mating connector, and a stress relief portion that curves outward is formed at the lower portion of the thin plate. The present invention provides a printed circuit board connector terminal structure.

According to the present invention, the upper portion of the thin plate is double- or triple-folded so as to have a thickness capable of being fitted into the female terminal of the mating connector to form a male terminal portion. Since the male terminal for the connector is formed with the curved stress relaxation portion, it is possible to provide an upper connector with less restriction on the coupling direction with the mating connector.

According to a second aspect of the present invention, a connector housing is formed integrally with a case accommodating the printed circuit board, and a through-hole through which the terminal can be inserted from outside is formed in the connector housing. Preferably, the terminal is inserted from the lower end and inserted into the through-hole of the printed circuit board, and at the same time, the male terminal is press-fitted and fixed in the through-hole.

With this configuration, the connector housing is formed integrally with the case for housing the printed circuit board, and the terminals are
When the lower end portion is inserted into the through hole from the outside and the lower end portion is inserted into the through hole of the printed circuit board, the male terminal portion can be press-fitted and fixed to the through hole from outside with one touch.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 2A and 2B, the connector terminal 5 is formed by pressing a thin metal plate having a small thickness T1 in an unfolded shape such that the upper portion 5a has a wide width W1 and the lower portion 5b has a narrow width W2. After the punching, the both sides of the upper portion 5a are double-folded inward at the valley fold lines a, a as shown by arrows b, b, as shown in FIGS. 2C, 2D, and 2E. The thickness T2 (T2 = T1 +
The male terminal portion 5c set as T1) is formed. This male terminal 5
c may be triple folded as shown in FIG. 2 (F).

When the thin plate is punched, substantially V-shaped cuts 5e, 5e are formed at the upper end portions of the valley fold lines a, a of the upper portion 5a so as to be cut surfaces 5d, 5d when folded. At the same time, substantially Ω-shaped cuts 5g, 5g are formed in the lower end portions of the valley fold lines a, a of the upper portion 5a so as to be press-fit concave portions 5f, 5f when folded.

The lower portion 5b of the connector terminal 5 is formed with a stress relaxing portion 5h which is curved outward in a semicircular shape. The stress relaxing portion 5h may be meandering vertically as shown in FIG. 2 (G).

On the other hand, as shown in FIG.
A connector housing 9 into which a mating connector is fitted is formed integrally with the lower case 8 of the electric connection box 7 for housing the connector terminal 9 upwardly with respect to the printed circuit board 6. ,... 5 are formed from the outside to form through holes 9b,. Also, the through holes 6 corresponding to the respective through holes 9b are provided.
, 6a are formed on the printed circuit board 6.

As shown in FIG. 2B, relief grooves 9c,..., 9c are formed in the through holes 9b so that the stress relief portions 5h of the connector terminals 5 can be easily inserted.

With the above connector terminal structure,
The connector terminal 5 is inserted into the through hole 9b of the connector housing 9 of the lower case 8 from the outside with the lower end 5i inserted into the through hole 6a of the printed circuit board 6.

Simultaneously with this insertion work, the press-fit recess 5f of the male terminal portion 5c is press-fitted into the through hole 9b, and the male terminal portion 5c is press-fitted and fixed into the through hole 9b with one touch.

Thereafter, while conveying the printed circuit board 6 together with the lower case 8, the molten solder f is supplied from the back side to solder each connector terminal 5 to the circuit (flow soldering method).

With the above-described structure, it is possible to provide an upward connector with less restriction on the coupling direction with the mating connector, and the male terminal portion 5c of the connector terminal 5 can be formed by simply folding a thin metal plate. And can be easily formed into a thickness that can be pressed into the female terminal of the mating connector.
Since h remains a thin plate, the response of stress relaxation is good, and solder cracks are less likely to occur.

Further, if the connector housing 9 is formed integrally with the lower case 8, it is not necessary to arrange the connector housing 9 as a separate component on the printed circuit board 6, so that the number of components is reduced.

[0023]

As is clear from the above description, in the connector terminal structure of the present invention, the upper portion of the thin plate is folded double or the like to form a male terminal portion, and a curved stress is applied to the lower portion of the thin plate. Since the male terminal for the connector is provided with the relief portion, it is possible to provide an upper connector with less restrictions on the coupling direction with the mating connector. Further, the male terminal portion can be easily formed into a thickness that can be easily fitted into the female terminal of the mating connector by simply folding the thin plate into a double or the like, and the stress relieving portion is a thin plate. The responsiveness of relaxation is improved.

Further, the connector housing is integrally formed with the case for accommodating the printed circuit board.
Inserting the terminal into the through hole from the outside and inserting the lower end into the through hole of the printed circuit board allows the male terminal part to be pressed into the through hole with one touch from the outside. It is not necessary to dispose the connector housing as above, so that the number of parts is reduced and the cost can be reduced.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a printed circuit board connector terminal structure of the present invention, wherein (A) is a side sectional view, (B) is a plan view of a connector housing, and (C) is an enlarged view of a main part of (A).

2 (A) is a front view of an unfolded state, FIG. 2 (B) is a side view, FIG. 2 (C) is a front view of a folded state, FIG. 2 (D) is a side view, and FIG. (F) is a plan view of the first modification, and (G) is a side view of the second modification.

FIG. 3 is a conventional connector terminal structure for a printed circuit board, in which (A) is a side view of a horizontal connector, (B) is a perspective view of a connector terminal, and (C) is a side view of an upward connector.

[Explanation of symbols]

 Reference Signs List 5 connector terminal 5a upper part 5b lower part 5c male terminal part 5f press-fit recess 5h stress relieving part 5i lower part 6 printed circuit board 6a through hole 7 electric connection box 8 lower case 9 connector housing 9a through hole

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Takahiro Onizuka 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Research Institute, Inc.

Claims (2)

[Claims] 1. A connector terminal for soldering by inserting a lower end portion from above into a through hole of a printed circuit board, wherein said terminal is folded over an upper portion of a thin plate and fitted into a female terminal of a mating connector. A connector terminal structure for a printed circuit board, wherein a male terminal portion having a possible thickness is formed, and an outwardly curved stress relief portion is formed below the thin plate. 2. A connector housing is formed integrally with a case accommodating the printed circuit board, and a through hole through which the terminal can be inserted from the outside is formed in the connector housing. The connector terminal structure for a printed circuit board according to claim 1, wherein the male terminal portion is press-fitted and fixed in the through-hole at the same time as being inserted into the through hole of the printed circuit board.