JP2000261133A - Terminal presser jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent inclination and separation of a terminal from a wiring board when soldering the terminal on the wiring board. SOLUTION: A pair of legs 30 is vertically formed downward from both ends of a presser member 21. Holes 22 for fitting top sections 4 of a terminal 1 are formed on the presser member 21. Pin sections 31 capable of pressing fit into positioning holes formed on a wiring board 10 are respectively formed on the pair of legs 30. Pin sections 31 are press fit into the positioning hole so that the top sections 4 are fit into each hole section 22 from under side to tentatively fix each terminal 1 onto the wiring board 10 by pressing the upward face of the steps of each terminal 1 with the bottom face of the presser member 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal holding jig for temporarily fixing a terminal when the terminal is soldered on a wiring board.

[0002]

2. Description of the Related Art As a kind of a terminal such as a male terminal or a female terminal, a lead portion vertically provided from a terminal portion thereof is inserted into a through hole formed in a wiring board so as to protrude toward the lower surface of the wiring board. There is a type in which the protruding lead portion is soldered to a land on the lower surface of the wiring board.

[0003] One of the methods for soldering these terminals to a wiring board is flow soldering.

[0004]

However, since the flow soldering is performed by bringing the lower surface of the wiring substrate into contact with the molten solder jet, the lead projecting to the lower surface of the wiring substrate is formed of molten solder. There is a problem that the terminal may be inclined or may be lifted off the wiring board under the force of the flow.

In this case, if the terminal is inclined by 1 ° or more with respect to the direction orthogonal to the surface direction of the wiring board, it becomes difficult to connect other external terminals to the terminal mounted on the wiring board.

Accordingly, the present invention has been made to solve the above-mentioned problem, and it is possible to prevent the terminals from being inclined and floating from the wiring boards when the terminals are soldered on the wiring boards. An object of the present invention is to provide a simple terminal holding jig.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a terminal holding jig according to the present invention is provided with a top portion connected to an upper portion of a terminal base and having an upwardly directed portion between the terminal base and the top portion. A terminal having a terminal portion having a step having a surface and a lead portion extending downward from a lower portion of the terminal portion is inserted into a through hole formed in the wiring board. A terminal holding jig used when soldering is performed, wherein a holding member formed with a hole portion into which the top of the head can be fitted, and a terminal extending downward from a side portion of the holding member. A leg portion provided with a pin portion which can be press-fitted into a positioning hole formed in the wiring board at a lower end thereof, and the pin portion is positioned by fitting the top of the head from below the hole. Pressing the hole into the hole Presses the upward surface of the stepped portion at the lower opening peripheral edge portion of the hole is formed on the bottom surface of the timber, in which the terminal is to be fixed temporarily pressed on the wiring board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal holding jig according to an embodiment of the present invention will be described below.

First, a terminal 1 which is an object of the terminal holding jig will be described with reference to FIGS.

As shown in FIG. 1, the terminal 1 is a so-called female terminal. The terminal 1 is connected to another external male terminal, and extends below the terminal 2. It includes a pair of lead portions 9 used for electrical connection with a wiring pattern of a wiring board 10 described later.

The terminal portion 2 is formed of an insulating resin or the like, and is provided at an intermediate portion in the longitudinal direction of a substantially rectangular parallelepiped terminal base 3 extending in the left-right direction, at a substantially cubic top portion 4 narrower than the terminal base 3. And a pair of step portions 5 having an upward surface 5a are formed between the terminal base portion 3 and the top portion 4 on the left and right.

The terminal 2 has a top 4
, A female fitting portion 6 having a pair of contacts is housed and arranged from the portion below the terminal base portion 3 to the region below the terminal base portion 3. It is exposed to the outside.

Each lead 9 extends downward through the lower end of the terminal base 3 while being electrically connected to each contact in the female fitting 6 in the terminal 2. It is extended.

The terminal 1 thus configured is mounted on a wiring board 10, as shown in FIGS.

That is, a predetermined wiring pattern is formed on the lower surface side of the wiring substrate 10 by copper foil or the like, and each lead portion 9 is provided at a position where the terminal 1 is mounted.
Is formed. Further, a peripheral portion of the through hole 11 in the wiring pattern is formed on a land 12 for soldering. And
The respective lead portions 9 are inserted from above the respective through holes 11, and the respective lead portions 9 are protruded below the wiring board 10. Then, the respective lead portions 9 are removed by a known flow soldering method or the like. The terminals 1 are mounted on the wiring board 10 by soldering to the lands 12.

In the wiring board 10 of FIG. 2, a pair of positioning holes 13 are formed so as to sandwich the terminals 1 arranged in a row in the arrangement direction, which will be described later.

As shown in FIG. 4, a male terminal 19 is inserted into the terminal 1 mounted on the wiring board 10 from above as shown in FIG.

The terminal 1 to which the present invention is applied is configured as described above. Next, a terminal holding jig will be described with reference to FIG.
This will be described with reference to FIGS.

The terminal holding jig 20 has a long plate-shaped holding member 21 and a pair of legs 30 provided at both ends of the holding member 21.

The holding member 21 is a long plate-shaped member having a thickness substantially the same as the height of the top portion 4 of the terminal 1.
A plurality of holes 22 are formed corresponding to the positions of the terminal portions 2 of the respective terminals 1 mounted on the “0”. For example, in the present embodiment, four terminals 1 are arranged in series in close proximity to each other on the wiring board 10 to form one terminal group (see FIG. 2), and three such terminal groups are arranged at a predetermined interval. It is assumed that they are arranged in series and are mounted separately.

As shown in FIGS. 8 and 9, each of the holes 22 is formed in a shape corresponding to the shape of the top portion 4 in a plan view, that is, a square hole having a substantially rectangular shape in a plan view. The crown 4 is formed so as to be fitted inside.

The lower opening edge of each hole 22 is finished in a tapered portion 22a which gradually expands downward, and the top portion 4 is fitted into the hole 22 from below the holding member 21. At the time of insertion, the top portion 4 is guided into the hole portion 22 by the tapered portion 22a, so that the fitting can be easily performed.

Each of the legs 30 is a member vertically extending from both ends of the holding member 21 and has a height H.
Are finished to have substantially the same height dimension h (see FIG. 1) of the terminal base 3 of the terminal 1. Then, the terminal 1 is inserted into each hole 22.
In a state in which the lower end surface 30a of each leg 30 is in contact with the upper surface of the wiring board 10, the peripheral portion of each hole 22 on the lower surface of the holding member 21 The portion 5 is configured to contact the upward surface 5a.

On the lower end surface of each leg portion 30, a pin portion 31 which can be press-fitted into a positioning hole 13 (see FIG. 2) formed in the wiring board 10 is provided in a protruding manner. Then, each pin portion 31 is press-fitted and fixed in each positioning hole 13,
The pressing member 21 is configured to be positioned and held at an upper and lower position where the lower surface thereof is in contact with the upward surface 5a of the step portion 5 of the terminal 1.

The terminal holding jig is configured as described above. Next, a method of soldering the terminal 1 to the wiring board 10 using the terminal holding jig will be described.

First, a wiring board 10 in which a predetermined wiring pattern and a through hole 11 are formed in advance is prepared.
By inserting the lead portions 9 of the respective terminals 1 so that the respective lead portions 9 protrude from the lower surface side of the wiring board 10.
Is set on the wiring board 10 (see FIG. 2).

Next, as shown in FIG. 10, the pin portions 31 of the respective terminals 1 are fitted into the respective holes 22 from the lower side thereof so that the respective pins 31 are positioned in the positioning holes 13 of the wiring board 10.
Is press-fitted into the upper surface 5 of the step 5 of each terminal 1 at the peripheral portion of each hole 22 in the lower surface of the pressing member 21.
a, and the terminals 1 are temporarily fixed on the wiring board 10 by the terminal holding jig.

Then, in this state, the wiring board 10 is fed onto the molten solder jet S as shown in FIG. 11, and the molten solder jet S is supplied to the lower surface side of the wiring board 10 so that the wiring board 10 Lead 9 protruding from the lower surface
Is soldered to the land 12 on the lower surface of the wiring board 10.

Thereafter, the terminal holding jig 20 is connected to the wiring board 1.
0, the terminals 1 to the wiring board 10 can be removed.
Is completed.

The terminal holding jig 2 constructed as described above
According to No. 0, a plate-shaped pressing member 21 having a plurality of holes 22 into which the top portion 4 of each terminal 1 can be fitted, and extending downward from both sides of the pressing member 21 and below the pressing member 21. Since a pair of legs 3 is provided on the end surface 30a, and a pin 31 that can be press-fitted into the positioning hole 13 formed in the wiring board 10 is fitted, the crown 4 is fitted from below each hole 22. Each pin portion 31 is press-fitted into the positioning hole 13 of the wiring board 10 so that the upper surface of the step portion 5 of the terminal 1 at the lower opening peripheral portion of each hole 22 on the lower surface of the plate-like holding member 21. By pressing 5a, each terminal 1 can be pressed onto the wiring board 10 and temporarily fixed. Therefore, for example, when each terminal 1 is soldered to the wiring board 10 by flow soldering or the like, the lead portion 9 protruding downward from the wiring board 10 receives a force due to the flow of the molten solder. However, the terminal 1 at the time of soldering
In addition, it is possible to prevent wobble, prevent the inclination of each terminal 1 after soldering, and prevent the terminal 1 from being lifted from the wiring board 10, and also accurately maintain the alignment between the terminals 1.

Since each terminal 1 is mounted on the wiring board 10 at an accurate position as described above, it is possible to connect other external terminals to each terminal 1 reliably and easily.

Further, since the lower opening edge of each hole 22 is formed into a tapered portion 22a which gradually expands downward, the top portion 4 of each terminal 1 is fitted into the hole 22 when fitted. The tapered portion 22 functions as a guide, facilitating the fitting operation, and therefore, the effect that the terminal holding jig 20 can be easily set on the wiring board 10 is also obtained.

In particular, since the pin portions 31 formed on the legs 30 of the holding jig 20 are press-fitted into the respective positioning holes 13 formed on the wiring board 10, the terminal holding jig 20 can be used. The terminal 1 can be held at an accurate position with respect to the wiring board 10, whereby the posture of the terminal 1 can be held more accurately.

The object to which the terminal holding jig 20 is applied is not limited to the above-mentioned female terminal 1, and even for other male terminals or the like, the top of the terminal base is continuously provided above the terminal base. The present invention is applicable as long as it has a shape in which a step having an upward surface is formed between the terminal base and the crown.

[0035]

As described above, according to the terminal holding jig of the present invention, the holding member having the hole into which the top of the head can be fitted, and the holding member extending downward from the side of the holding member. And a leg on the lower end of which a pin portion that can be press-fitted into a positioning hole formed in the wiring board is provided, and the pin portion is pressed into the positioning hole so as to fit the top of the head from below the hole. By pressing the upper surface of the step at the lower opening peripheral portion of the hole on the lower surface of the holding member,
Since the terminal is pressed down on the wiring board and temporarily fixed, when the lead is inserted into the through hole formed in the wiring board and soldered, the terminal is pressed down and temporarily fixed on the wiring board. be able to. Therefore, for example, when the lead portion projecting to the lower surface side of the wiring board receives a force or the like due to the flow of the molten solder, an effect of preventing the terminal from being tilted or rising from the wiring board can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a terminal which is a target of a terminal holding jig according to the present invention.

FIG. 2 is a perspective view showing a state where the terminal is mounted on a wiring board.

FIG. 3 is a cross-sectional view showing a state where the terminal is mounted on a wiring board.

FIG. 4 is a perspective view showing a state in which another terminal is connected to a terminal mounted on a wiring board.

FIG. 5 is a perspective view showing a terminal holding jig according to the present invention.

FIG. 6 is a front view showing the terminal holding jig of the above.

FIG. 7 is a bottom view showing the terminal holding jig of the above.

FIG. 8 is an enlarged bottom view of a main part showing a hole part of the terminal holding jig according to the first embodiment.

FIG. 9 is an enlarged sectional view of a main part showing a hole part of the terminal holding jig according to the first embodiment.

FIG. 10 is a perspective view showing a state where each terminal is temporarily fixed using the terminal holding jig according to the embodiment.

FIG. 11 is a view showing one step of flow soldering each terminal to a wiring board using the terminal holding jig of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 terminal 2 terminal part 3 terminal base 4 top part 5 step part 5a upward surface 9 lead part 10 wiring board 13 positioning hole 20 terminal pressing jig 21 pressing member 22 hole part 22a taper part 30 leg part 31 pin part

Claims (1)

[Claims] A terminal portion having a top portion connected to an upper portion of the terminal base portion and a step having an upward surface formed between the terminal base portion and the top portion; and a lower portion extending downward from a lower portion of the terminal portion. A terminal holding jig used when a terminal having a lead portion extending toward the terminal is soldered by inserting the lead portion into a through hole formed in a wiring board, wherein the top portion is A holding member having a hole that can be fitted therein is formed, and a pin portion extending downward from a side portion of the holding member and having a lower end protruding into a positioning hole formed in the wiring board is projected. A leg provided on the lower surface of the holding member, and press-fitting the pin into the positioning hole so as to fit the crown from below the hole. Pressing the upward surface of the step at the periphery of the opening And a terminal pressing jig configured to press and temporarily fix the terminal on the wiring board.