JP2002100427A - Terminal for connecting wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability of soldering a terminal to a circuit board, after it has been pressed in and retained by a connector housing or the like. SOLUTION: This terminal for connecting a wiring board is an elongated one, formed by cutting and pressing a sheet metal used as material. In the terminal, a contact part to a mating terminal, a press-in retention part which is pressed in and retained by the housing, a stress-absorbing part, and a soldering part to the circuit board are formed along the axis, which extends from its one end to the other end, in this order. The contact part, the press-in retention part and the soldering part respectively have surfaces directed in the same direction. The stress-absorbing part is formed by bending the base part of a fallen U-shaped projection part projecting in parallel with the surface and perpendicularly to the axis of the press-in retention part and the soldering part from the side edge of the press-in retention part and the soldering part between the press-in retention part and the soldering part in the direction perpendicular to the surface along a folding line which is parallel with the axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal to be soldered and fixed to a circuit board and further press-fitted and held in a connector housing. The present invention relates to a wiring board connection terminal structure capable of improving the performance.

[0002]

2. Description of the Related Art For example, one end of a connection terminal penetrated and held in a connector housing is penetrated through a circuit board, and the penetrating end is soldered and fixed to a circuit provided on the circuit board. As a conventional example, Japanese Patent Laid-Open No. 10-2
There is one described in Japanese Patent No. 33269.

The structure of this conventional wiring board connection terminal will be described with reference to FIGS. 10 and 11. FIG.
1 is a wiring board connection terminal (hereinafter simply referred to as a terminal)
Is formed in a stress absorbing portion 2 having a substantially middle portion in the longitudinal direction bent into a crank shape. The stress absorbing portion 2 is press-fitted and held in a locking hole 4 formed in the connector housing 3. One end of the terminal 1 is formed at a connection end 1A with a mating terminal located in the connector housing 3, and the other end of the terminal 1 is formed at a soldering end 1B with the circuit board 5.

The necessity of the stress absorbing portion 2 is that the soldering end 1 B of the terminal 1 is soldered to the circuit board 5.
Elongation occurs due to thermal expansion.
This is to prevent the problem that the circuit foil on the surface of the circuit board 5 soldered to the terminals is peeled off.

The procedure for soldering the soldering end 1B of the terminal 1 to the circuit board 5 is as follows.
Is passed through a locking hole 4 formed in the connector housing 3, and the stress absorbing portion 2 of the terminal 1 bent into a crank shape is press-fitted and locked in the locking hole 4. Next, soldering is performed after the soldering end 1B of the terminal 1 locked to the connector housing 3 is penetrated into a soldering hole 5A formed in the circuit board 5 in advance.

[0006]

However, in the terminal 1 having the above-mentioned shape, a stress absorbing portion 2 bent into a crank shape is formed at an intermediate portion in the longitudinal direction of the terminal. 2 is bent in a crank shape in the direction of the thickness of the terminal, so that the stress absorbing portion is liable to be elastically deformed. Due to this, the positional accuracy of the terminal 1 pressed and held in the connector housing 3, especially solder The positional accuracy of the attachment end 1B is not stable. Therefore, for example, the soldering end 1B of the terminal 1 pressed and held in the connector housing 3 by an automatic assembler or the like is inserted into the soldering hole 5 of the circuit board 5.
This makes it difficult to insert the terminal 1 into the circuit board A, which hinders the work of soldering the terminal 1 and the circuit board 5.
In particular, when a large number of terminals 1 are press-fitted into the connector housing 3, the soldered ends 1B of these terminals are smoothly inserted into respective solder holes pre-drilled in the circuit board. It was difficult to insert the

In the conventional example shown in FIG. 11, the shape of the stress absorbing portion 2 provided on each terminal 1 is formed to be curved in the thickness direction of the terminal 1. Since the shape of the absorbing portion 2 is curved in the thickness direction of the terminal, the shape stability of the stress absorbing portion is poor, so that
The stability of the position of the soldering end 1B of the terminal 1 fixed to the connector housing 3 was poor.

Accordingly, the soldered end 1 of the terminal 1 is
B has difficulty in an assembling operation for inserting B into a soldering hole 5A formed in the circuit board 5 in advance.

The present invention has been made in view of such a conventional fact, and has a stress absorbing portion formed between both ends of a wiring board connecting terminal, and one end portion bordering the stress absorbing portion is connected to a connector housing. At a wiring board connection terminal for soldering to a circuit provided on the circuit board by allowing the other end to penetrate into a soldering hole formed in the circuit board. In a no-load state to the connection terminal, a stress absorbing portion is provided that prevents displacement between both terminal portions of the terminal bordering the stress absorbing portion and prevents displacement between the terminal both ends, A terminal for inserting the soldering end into a soldering hole previously provided on the circuit board so that the set position of the soldering end in the wiring board connection terminal pressed and held in the connector housing does not occur. Improves insertion workability And an object thereof is to provide a wiring board connecting terminals to allow.

[0010]

To achieve the above object, according to the present invention, a stress absorbing portion which can bend in the longitudinal axis direction is formed at a middle portion in the longitudinal direction of the terminal, and the stress absorbing portion is formed. A wiring board that press-fits and holds one end of the circuit board into the housing and inserts the other end into a soldering hole formed in advance on the circuit board and solders the circuit provided on the circuit board In the connection terminal, the wiring board connection terminal is an elongated terminal cut and pressed using a sheet metal as a material, and the terminal is in contact with a mating terminal along an axis from one end to the other end. Part, a press-fit holding part press-fitted and held by the housing, a stress absorbing part, and a soldering part with the circuit board, and each of the contact part, the press-fit holding part, and the soldering part is a surface in the same direction. And the above-mentioned stress absorption The portion extends horizontally between the press-fit holding portion and the soldering portion in a direction parallel to the surface and in a direction perpendicular to the axis of the press-fit holding portion and the soldering portion from a side edge of the press-fit holding portion and the soldering portion. It is a wiring board connecting terminal formed by bending a base of a U-shaped overhang along a folding line parallel to the axis in a direction perpendicular to the surface.

According to a second aspect of the present invention, in addition to the first aspect, the stress absorbing portion is a wiring board connecting terminal provided at a position symmetrical in the surface width direction of the press-fit holding portion and the soldering portion. It is characterized by:

Therefore, according to the first and second aspects of the present invention, the stress absorbing portion formed between the press-fit holding portion and the soldering portion has a side edge between the press-fit holding portion and the soldering portion. Since the U-shaped portion is formed to be bent in a direction perpendicular to the surfaces of the press-fit holding portion and the soldering portion, the U-shaped portion is formed to be bent through the stress absorbing portion with respect to the press-fit holding portion. The form stability of the connected soldering portions is improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Example 1 In FIGS. 1 to 5, reference numeral 11 denotes a wiring board connection terminal which is stamped and press-formed from a metal plate having good conductivity, and the wiring board connection terminal 11 has a mating terminal at one end thereof. Contact portion 12 is formed.
The press-fit holding section 13, the stress absorbing section 14, and the soldering section 15 are formed in this order from the other end toward the other end.

The surfaces of the contact portion 12, the press-fit holding portion 13 and the soldering portion 15 are formed so as to be flush with each other, and their surface widths L and L1 are appropriately set to dimensional widths. .

The structure of the stress absorbing portion 14 formed between the press-fit holding portion 13 and the soldering portion 15 is as follows. The bases of the lateral U-shaped overhangs formed in the parallel direction so as to overhang in a direction perpendicular to the axes Y and Y1 of the press-fit holding portion 13 and the soldering portion 15 are connected to the axes Y and Y.
It is formed by bending in a direction perpendicular to the surface along a folding line S parallel to 1.

The wiring board connecting terminal 11 formed in such a structure is connected to the press-fit holding portion 13 and the soldering portion 1 from a side edge between the press-fit holding portion 13 and the soldering portion 15.
5 which is bent so as to be perpendicular to the surface of 5
Since the stress absorbing portions 14 are formed integrally, the stress in the axial center Y, Y1 direction between the pressure holding portion 13 and the soldering portion 15 can be absorbed by the action of the stress absorbing portions 14. Can be. Further, since the U-shaped stress absorbing portion 14 provided between the press-fitting holding portion 13 and the soldering portion 15 is formed to be curved in a direction orthogonal to the thickness direction, the conventional stress formed to be curved in the thickness direction. Compared with the absorbing portion, the stress absorbing portion according to the present embodiment has improved terminal shape stability.

Therefore, the wiring board connection terminal 11 of this embodiment is
For example, as shown in FIG. 5, after being press-fitted and held in a terminal press-fitting hole 16 provided in a connector housing, a soldering portion 15 formed in the wiring board connection terminal 11 is provided on a circuit board 17. When trying to insert into the soldering hole 18, the position stability of the soldering portion 15 is good, so that the soldering portion 15 can be smoothly inserted into the soldering hole 18. The workability of soldering the wiring board connection terminal 11 and the circuit board 17 is improved. Embodiment 2 In FIGS. 6 to 9, the wiring board connection terminal 11 shown in this embodiment is a large terminal which is advantageous when used in a circuit for flowing a relatively large current, for example. In the wiring board connection terminal 11 of this embodiment, the press-fit holding portion 1 is located at a position symmetrical in the terminal width direction in the same manner as in the above embodiment.
Each of the stress absorbing portions 14 is provided so as to straddle between the soldering portion 3 and the soldering portion 15.

The wiring board connection terminal 11 shown in this embodiment.
Similarly to the stress absorbing portion 14 described in the first embodiment, since the stress absorbing portion 14 provided in the first embodiment is formed to be curved in the direction perpendicular to the plate thickness direction, the shape stability of the terminal is enhanced. Further, in this embodiment, since the stress absorbing portion is provided in double, the form stability of the terminal can be further enhanced, which is advantageous as a large-sized wiring board connecting terminal.

[0019]

As described above, according to the wiring board connecting terminal of the first and second aspects of the present invention, the stress absorbing portion formed between the press-fit holding portion and the soldering portion is provided. ,
The U-shaped portion is formed by bending in a horizontal U-shape from the side edge of the press-fit holding portion and the soldering portion, and the U-shaped portion is bent at right angles to the surfaces of the press-fit holding portion and the soldering portion. Therefore, the shape stability of the soldering portion connected to the press-fit holding portion via the stress absorbing portion is good, and therefore, the soldering portion of this wiring board connection terminal and the circuit board have The work of inserting into the soldering hole formed in advance can be performed smoothly and easily, and the workability of soldering the wiring board connection terminal and the circuit board is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a wiring board connection terminal according to the present invention.

FIG. 2 is a side view showing an embodiment of a wiring board connection terminal according to the present invention.

FIG. 3 is a plan view showing an embodiment of a wiring board connection terminal according to the present invention.

FIG. 4 is a perspective view showing an embodiment of a wiring board connection terminal according to the present invention.

FIG. 5 is an explanatory sectional view showing a state in which the wiring board connection terminal according to the present invention is pressed into a housing and soldered to a circuit board.

FIG. 6 is a front view showing another embodiment of the wiring board connection terminal according to the present invention.

FIG. 7 is a side view showing another embodiment of the wiring board connection terminal according to the present invention.

FIG. 8 is a plan view showing another embodiment of the wiring board connection terminal according to the present invention.

FIG. 9 is a perspective view showing another embodiment of the wiring board connection terminal according to the present invention.

FIG. 10 is an explanatory view showing a mounting form of a conventional wiring board connection terminal.

FIG. 11 is an explanatory view showing a mounting form of a wiring board connection terminal as still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Wiring board connection terminal 12 Contact part 13 Press-fit holding part 14 Stress absorption part 15 Soldering part

Claims (2)

[Claims] 1. A stress absorbing portion which can bend in the longitudinal axis direction is formed in a middle portion in a longitudinal direction of a terminal, one end portion bordering the stress absorbing portion is press-fitted and held in a housing, and the other end portion is A wiring board connection terminal to be inserted into a soldering hole formed in advance on the circuit board and soldered to a circuit provided on the circuit board, wherein the wiring board connection terminal is formed by using a sheet metal as a cutting press. An elongated terminal to be formed, the terminal having a contact portion with a counterpart terminal along an axis from one end to the other end, a press-fit holding portion pressed and held by a housing, a stress absorbing portion, a circuit board; The contact portion, the press-fit holding portion, and the soldering portion each have a surface in the same direction, and the stress absorbing portion is soldered to the press-fit holding portion. Press-fit holding part and solder The base of the horizontal U-shaped overhanging portion extending from the side edge of the attaching portion in a direction parallel to the surface and in a direction perpendicular to the axis of the press-fit holding portion and the soldering portion, along the folding line parallel to the axis, A terminal for connecting a wiring board, which is bent at a right angle to the terminal. 2. The wiring board connection terminal according to claim 1, wherein the stress absorbing portion is provided opposite to the press-fit holding portion and the soldering portion at positions symmetrical in the surface width direction.