JPH09115574A - Connection terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the connection terminal which surely prevents its soldering position from being slipped because of the surface tension of solder itself when soldered. SOLUTION: A plate both sides of which are plated, is punched in a slender shape, is folded substantially in a U shape, and its one end is soldered to the circuit pattern of a substrate 8 so as to be turned out an electrically connected connection part 4, so that a first soldering part 6 and a second soldering part 7 are thereby formed at the different positions on the straight line in the longer direction of the aforesaid connection part 4. In addition, the plate is raised up at the first and second soldering parts 6 and 7 in such a way that the inner surfaces of the folded plate are faced to each other. The first and second soldering parts 6 and 7 are then soldered to the circuit pattern of the substrate 8 respectively. By this constitution, since the first and second soldering parts 6 and 7 are pulled up by solder in the direction that the surface tension of solder itself is canceled, slippage in position can thereby be prevented when soldered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting terminal.

[0002]

2. Description of the Related Art A conventional connecting terminal 101 is, as shown in FIG. 10, formed by pressing a thin metal plate having good conductivity and having a contact portion 102 at one end.
Connection part 103 for soldering the other end to the circuit pattern of the board
The contact portion 102 and the connecting portion 103 are bent approximately 180 degrees so as to be elastically deformable. Further, in order to widen the contact area between the solder and the connection terminal 101 to enhance the soldering strength and to obtain a good electrical contact, the end portion of the connection portion 103 is bent upward. ing.
Such a connection terminal 101 can be electrically connected by soldering the end portion of the connection portion 103 to the circuit pattern of the substrate.

However, since such a connecting terminal has a soldering portion only at one end portion of the connecting portion 103, the surface of the solder itself during the soldering causes the connecting terminal to move to the right in FIG. I was pulled in the direction and moved,
When the solder is solidified, the soldering position shifts from a predetermined position, and the position of the contact portion 102 also shifts, so that good electrical contact cannot be obtained and there is a problem that contact reliability is poor. . In particular, in recent years, due to the downsizing of the device, even if the contact portion 102 is slightly displaced,
In some cases, there is a problem that no electrical connection can be obtained.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a connecting terminal which has good contact reliability and is free from any electrical connection.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a conductive plate material is punched into an elongated shape so that one end serves as a contact portion and the other end serves as a connecting portion for electrically connecting to a circuit pattern on a substrate.
In the connection terminal bent so as to be elastically deformable between the contact portion and the connection portion, a plurality of soldering portions are formed in the connection portion, and the soldering portions are cut and raised upward so that the inner surfaces of the plate members face each other. Formed and soldered to each of the circuit patterns.

Further, the soldering portions are formed at different positions in the longitudinal direction of the punched elongated plate material.

Further, the soldering portion is formed at different positions in the plate width direction of the punched elongated plate material.

Further, at least one of the soldering portions is formed at a position below the contact portion with a predetermined distance from the contact portion.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of the present invention. In FIG. 1, 1 is a connecting terminal, 8
Is a substrate, and 9 is an object to be connected.

The connecting terminal 1 is generally U-shaped as shown in FIGS. 1 to 5, and has a contact portion 2 whose one end electrically contacts the conductive portion 10 of the connected body 9. The other end is a connection portion 4 which is soldered to the circuit pattern 3 of the substrate 8 and electrically connected thereto.

As shown in FIG. 1, the contact portion 2 is formed in an upwardly protruding mountain shape.

At the connecting portion 4, as shown in FIGS.
Two soldering portions, a first soldering portion 6 and a second soldering portion 7, are formed. The tip ends of the first soldering portion 6 and the second soldering portion 7 are bent upward by approximately 90 degrees so that the inner surfaces of the plate members face each other, and the first soldering portion 6 and the second soldering portion 7 are bent. The flat part on the base end side is soldered while being in contact with the circuit pattern 3 of the substrate 8. Here, the inner surface of the plate material is a surface facing each other when the plate material is bent into a substantially U shape. As shown in FIG. 1, the solder 5 has the first soldering portion 6 due to the surface tension of the solder 5 itself.
Along the bent portion of the second soldering portion 7 and slightly above the substrate 8. Second soldering part 7
Is bent so as to be positioned below the contact portion 2 with a certain distance from the contact portion 2. Further, the first soldering portion 6 and the second soldering portion 7 are prevented from sticking together with the solder 5 when soldering to the circuit pattern 3, that is, the solder 5 is in an independent state, It is formed with a predetermined interval. Here, the connection part 4
The longitudinal direction is the left and right direction in FIG. 1, and the plate width direction is the up and down direction in FIG.

Next, the manufacturing process of the connection terminal 1 will be described. First, a plated conductive thin metal plate material is punched into an elongated shape by a pressing machine. At this time, the first soldering portion 6 and the second soldering portion 7 are also formed at the same time. The first soldering portion 6 and the second soldering portion 7 are formed at different positions on the same straight line in the longitudinal direction of the connecting portion 4. Next, while bending the punched metal thin plate material into a substantially U shape,
The one end is bent upward so as to form a projecting chevron to form the contact portion 2. Further, the tips of the first soldering portion 6 and the second soldering portion 7 are moved upward so that the inner surfaces of the plate members face each other. Bend about 90 degrees.

In the connecting terminal 1 thus manufactured, when the conductive portion 10 of the connected body 9 comes into contact with the contact portion 2, the contact portion 2 is elastically deformed inward to obtain a predetermined contact pressure, Conductive part 1
0 and the contact portion 2 are electrically connected. As a result, the conductive portion 10 and the circuit pattern 3 are electrically connected through the first soldering portion 6 and the second soldering portion 7 which are soldered to the circuit pattern 3 of the substrate 8.

In such a connecting terminal 1, the first soldering portion 6 and the second soldering portion 7 are formed in the connection portion 4, and the first soldering portion 6 and the second soldering portion 7 are formed. The tip of each of them is bent upward by about 90 degrees so that the inner surfaces of the plate members face each other and soldered to the circuit patterns 3, respectively. Therefore, at the time of soldering, the surface tensions of the solders 5 themselves are pulled in a direction in which they cancel each other. It is possible to prevent the displacement of the working terminal 1 and improve the electrical connection. Further, since the soldering portions are formed at different positions on the same straight line in the longitudinal direction of the punched elongated plate material, the surface tension of the solder 5 itself causes
It is possible to more reliably prevent the displacement of the connection terminals 1 during soldering by pulling each other with substantially equal forces. Further, since the second soldering portion 7 is formed below the contact portion 2 with a certain distance from the contact portion 2, even if the contact portion 2 is strongly pressed by the conductive portion 10 from above, It is possible to prevent the contacting portion 2 from being bent inward more than necessary and the connecting terminal from being deformed by the soldering portion 7 serving as a stopper.

FIGS. 7 to 9 show a connecting terminal 1 according to a second embodiment of the present invention, in which a first soldering portion 21 and a second soldering portion 22 are made of a plate material. Since they are formed at different positions on the same straight line in the plate width direction, and other configurations are similar to those of the first embodiment, the description thereof will be omitted.

According to the connection terminal 1 of the second embodiment, the first soldering portion 21 and the second soldering portion 22 are
Since the punched elongated plate members are formed at different positions on the same straight line in the plate width direction, the surface tension of the solder 5 itself pulls each other with almost equal forces. It is possible to reliably prevent the deviation.

The present invention is not limited to the above embodiment, and various modifications can be considered within the scope of the present invention.
For example, the connecting terminal 1 does not necessarily have to be bent in a U shape, and may be S-shaped or L-shaped and may be cut and raised upward at a plurality of positions of the connecting portion 4 so that the inner surfaces of the plate members face each other and soldered. It suffices if a part is formed. Further, in the present invention, the tip of the soldering portion is bent upward by approximately 90 degrees, but it is not always necessary to bend it by 90 degrees, and it is sufficient if the surface tensions of the solders 5 cancel each other. Further, according to the present invention, the first soldering portions 6 and 21 and the second soldering portions 7 and 22 are on the same straight line in the longitudinal direction of the punched elongated plate material or in the plate width direction of the punched elongated plate material. However, it is not always necessary to form them on the same straight line. Connection terminal 1 due to the surface tension of the solder 5 itself
If the soldering position of does not move, it does not have to be on the same straight line.

[0019]

As described above, in the connection terminal of the present invention, a plurality of soldering portions are formed in the connection portion, and the plurality of soldering portions are formed by cutting and raising so that the inner surfaces of the plate members face each other. Since each pattern is soldered, the surface tension of the solder itself at the time of soldering acts so as to cancel each other out, and it is possible to prevent the displacement of the connecting terminals during soldering and to improve the electrical connection. There is no situation where no electrical connection can be obtained.

Further, since the soldering portions are formed at different positions on the same straight line in the longitudinal direction or the plate width direction of the connecting portion, the soldering portions are almost mutually caused by the surface tension of the solder itself at the time of soldering. Since they are pulled with equal force, it is possible to reliably prevent the displacement of the connecting terminals during soldering.

Further, since at least one of the soldering portions is formed at a position below the contact portion with a predetermined distance from the contact portion, even if the contact portion is strongly pressed from above by the conductive portion, The soldering portion serves as a stopper, and the contact portion can be prevented from flexing inward more than necessary and the connecting terminal from being deformed.

[0022]

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a connection terminal according to the present invention is soldered to a substrate.

FIG. 2 is a plan view of the connection terminal of the present invention.

FIG. 3 is a bottom view of the connection terminal of the present invention.

FIG. 4 is a right side view of the connection terminal of the present invention.

FIG. 5 is a left side view of the connection terminal of the present invention.

FIG. 6 is a diagram for explaining a soldering position of a connection terminal according to the present invention to a circuit pattern on a substrate.

FIG. 7 is a plan view of a connection terminal according to a second embodiment of the present invention.

FIG. 8 is a front view of a connection terminal according to a second embodiment of the present invention.

FIG. 9 is a bottom view of the connection terminal according to the second embodiment of the present invention.

FIG. 10 is a front view of a conventional connecting terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection terminal 2 Contact part 3 Circuit pattern 4 Connection part 6 1st soldering part 7 2nd soldering part 8 Board 21 1st soldering part 22 2nd soldering part

Claims (4)

[Claims] 1. A conductive plate material is punched into an elongated shape so that one end serves as a contact portion and the other end serves as a connecting portion for electrically connecting to a circuit pattern of a substrate, and an elastic member is provided between the contact portion and the connecting portion. In the deformable bent connecting terminal, a plurality of soldering portions are formed in the connecting portion, the soldering portions are formed by cutting and raising upward so that the inner surfaces of the plate members face each other, and are soldered to the circuit patterns, respectively. Connection terminal characterized by the following. 2. The connection terminal according to claim 1, wherein the soldering portions are formed at different positions in a longitudinal direction of a punched elongated plate material. 3. The connection terminal according to claim 1, wherein the soldering portions are formed at different positions in a plate width direction of a punched elongated plate material. 4. The connection according to claim 1, wherein at least one of the soldering portions is formed at a position below the contact portion with a predetermined distance from the contact portion. For terminals.