JP2001102111A - Connecting terminal - Google Patents

Abstract

(57) [Problem] To provide a connection terminal which suppresses a connection height to a substrate and has good assemblability and maintainability. A printed circuit board (2), which can be inserted into a through hole provided in the printed board (22), is connected to a power terminal (24).
2 has a connection part formed of a conductive member having substantially the same thickness as that of the connection part 2, and a screw tap is formed in the connection part. The power terminal 24 has a screw 28 on the front side of the printed circuit board 22.
Can connect the cord 30 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal used for connecting a current output portion of a substrate requiring a large current.

[0002]

2. Description of the Related Art Conventionally, a large current connection with a substrate requiring a large current is made as shown in FIG. FIG.
In the example of the terminal connection shown in FIG.
The connection is made by connecting the T terminal 3 and winding a cord 4 for flowing a large current to the HPT terminal 3. In the example of the land connection shown in FIG. 7B, the through-hole land 6 is joined to the through-hole for the code connection provided on the printed circuit board 2, and the through-hole land 6 and the cord 4 are connected by soldering. are doing.
In the cord connection shown in FIGS. 7A and 7B, the wiring work is complicated, so that it takes a relatively long time, and the maintainability such as disassembly is poor.

On the other hand, there is also a connection using a ready-made power terminal 10 for large current connection as shown in FIGS. 7 (c) and 7 (d). The power terminal 10 has four legs, for example, and is made of a conductive material (for example, copper) provided with a screw tap for coupling a screw 12 on an upper portion supported by the legs. It is. In the example of power terminal connection shown in FIG. 7C, a through-hole land 8 is joined to through-holes (four holes) for connecting the power terminals 10 provided on the printed circuit board 2, and the legs of the power terminals 10 are passed through. The power terminal 10 and the printed circuit board 2 are connected by inserting them into holes and soldering 11 the legs of the power terminal 10 and the through-hole lands 8. Code 4
Are connected by screws 12 at screw taps provided on the upper surface of the power terminal 10. Therefore, the connection work of the cord 4 can be easily performed, and the assembling property is very good. Also, as shown in FIG. 7D, a large current can flow through the bus bar 14 outside the printed circuit board 2 using the power terminal 10. The bus bar 14 is connected to the power terminal 10 by a screw 12a.
2b allows easy connection.

[0004]

As described above, in the conventional large current connection with a substrate requiring a large current, the terminal connection (FIG. 7A) and the land connection can be performed by using the ready-made power terminal 10. The problem in (FIG. 7B) can be avoided. However, as shown in FIGS. 7 (c) and 7 (d), the conventional off-the-shelf power terminal 10 has a configuration in which a screw tap is provided on the upper portion supported by the leg portion.
There is a problem that the connection height to the printed circuit board 2 is high. For this reason, when the printed circuit board 2 is mounted in the housing of the apparatus, it is necessary to secure a height when the power terminal 10 is mounted, which is an obstacle to downsizing the apparatus.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a connection terminal that suppresses the height of connection to a substrate and has good assemblability and maintainability.

[0006]

SUMMARY OF THE INVENTION The present invention has a connecting portion formed of a conductive member having substantially the same thickness as a substrate and capable of being inserted into a through hole provided in the substrate, wherein the connecting portion has a screw tap. Is formed. According to such a configuration, the connection portion is inserted into the through hole provided on the substrate, thereby being connected to the wiring provided on the substrate (for example, being fixed to the substrate by soldering or the like,
In this state, a cord or bus bar for large current can be connected with a screw. Since the connection portion has substantially the same thickness as the substrate, the height of the connection to the substrate can be suppressed without sacrificing the ease of assembly and maintenance.

[0007] Further, the connection portion and the base portion are connected to each other,
An engagement member that engages with the substrate when the connection portion is inserted into a through hole provided in the substrate is provided. Accordingly, the engaging member functions as a stopper for preventing rotation of the connection portion against a screw torque to the connection portion generated when the screw is connected to the screw tap.

[0008] Further, the invention is characterized in that the plurality of connecting portions are connected by one base. This makes it possible to prevent rotation of the connection portion when the screw is connected to the screw tap without providing an engaging member.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of connection between a printed circuit board 22 requiring a large current using a power terminal 24 as a connection terminal according to the present embodiment and a large current output portion, and FIG. (FIG. 2 is a perspective view, FIG. 2 (b) is a side view,
(C) is a plan view, and FIG. 3 is a plan view showing an example of the printed board 22 using the power terminals 24 shown in FIG.

As shown in FIG. 2, the power terminal 24 has a cylindrical connecting portion 24d connected to a rectangular base 24b. The connecting portion 24d has a thickness substantially equal to that of the printed board 22 and can be inserted into a through hole provided in the printed board 22 and has a base 24b made of a conductive member such as copper.
It is formed integrally with. The connection part 24d is provided with a screw tap 24a so as to penetrate the connection part 24d and the base part 24b. Further, a prism-shaped rotation stopper 24c (engaging member) is provided at one apex on the surface of the base 24b to which the connecting portion 24d is coupled.

As shown in FIG. 3, the printed circuit board 22 has a through hole 36 for a connecting portion into which the connecting portion 24d of the power terminal 24 shown in FIG. 2 can be inserted, and a connecting portion 24d formed in the through hole 36 for the connecting portion. A stopper through hole 38 is provided in which the rotation stopper 24c provided in the connecting portion 24d is inserted (engaged) when inserted.

The power terminal 24 shown in FIG. 2 has a connection portion 24d from the back surface of the printed board 22 provided with the through hole 36 for the connection portion and the through hole 38 for the stopper as shown in FIG. The rotation stopper 24c is inserted into the stopper through hole 38, and is fixed by the soldering 32 as shown in FIG. The through-hole land 26 is attached to the through-hole 36 for the connection portion, and the connection portion 24d of the power terminal 24 is inserted into the through-hole 36 for the connection portion to be crimped, and the printed board is inserted through the through-hole land 26. Wiring (not shown) provided in a plurality of layers inside the substrate 22 can be connected to the power terminal 24 (crimping wiring connection).

A screw 28 is attached to the screw tap 24a on the power terminal 24 fixed to the printed board 22 so as to lock a connection fitting attached to the front end of the cord 30 on the surface of the printed board 22. To connect the cord 30 to the power terminal 24.

Next, the power terminal 24 in the present embodiment
The operation and effect when a large current connection as shown in FIG. 1 is performed using (connection terminals) will be described.

As shown in FIG. 1, the connection portion 24d of the power terminal 24 is formed to have substantially the same thickness as the printed board 22. Therefore, when the cord 30 is connected to the power terminal 24 by the screw 28, the connection height to the printed board 22 necessary for securing the height of the head of the screw 28 or the thickness of the cord 30 is secured. It can be kept very low.

The power terminal 24 is connected to the printed circuit board 22.
Is fixed to the surface of the printed board 22 and the connecting portion 2
The connecting portion 24d is formed such that the upper surface of the connecting portion 24d is substantially flat.
Is substantially the same as the thickness of the printed board 22, but a connection portion 24d that is slightly thinner or slightly thicker than the printed board 22 can be provided if the function of the connection of the power terminals 24 is not affected. is there.

Further, the connecting portion 24d of the power terminal 24 is made rectangular, and the connecting portion 24d is connected to the through hole 3 for the connecting portion.
6, the rotation stopper 24c that engages with the printed board 22 is provided, so that solder cracks due to screw torque when attaching the screw 28 to the screw tap 24a can be prevented.

Further, since the power terminal 24 is connected to the printed board 22 by crimp wiring, the power terminal 24 can be easily removed even when maintenance is performed, so that the maintainability is improved.

Incidentally, as shown in FIG.
The bus bar 40 for flowing a large current outside the print board 22 can also be connected by using. That is, the bus bar 40 can be connected to the power terminal 24 by mounting the screw 42a while aligning the screw tap provided on the bus bar 40 with the screw tap 24a of the power terminal 24. By providing a screw tap on the upper surface of the bus bar 40, the cord 30 can be connected to the bus bar 40 by the screw 42b. As described above, a configuration capable of connecting the bus bar 40 can be employed, so that a large current can be easily handled in the substrate.

Next, an example of another embodiment of the connection terminal in the present embodiment will be described. The dual power terminal 50 shown in FIG. 5A has a shape in which two connection portions 52a and 52b similar to the connection portion 24d provided in the power terminal 24 shown in FIG. . FIG. 5 (a)
As shown in the figure, connecting portions 52a and 52b are arranged along the longitudinal direction with respect to the rectangular base 51. Each of the connecting portions 52a and 52b is provided with a screw tap so as to penetrate the base portion 51, and a cord or a bus bar for flowing a large current can be connected by the screw. Further, as shown in FIG. 5B, a triple power terminal 56 having three connection portions on one base may be used.

Furthermore, it is possible to configure a power terminal provided with four or more connection parts. When configuring a power terminal provided with a plurality of connecting portions, the shape of the base is not limited to a rectangle, but may be any shape. Also, the arrangement of the connecting portions does not need to be arranged in a line, and can be arbitrarily determined.

As shown in FIGS. 5 (a) and 5 (b), a plurality of connecting portions are connected by one base, so that the operation of attaching the power terminal to the printed board is performed once. Therefore, it is possible to provide connection ends for a plurality of large current output portions, so that work efficiency is improved. Further, since a plurality of connecting portions are engaged with the printed board, it is possible to prevent a solder crack due to a screw torque at the time of screw connection without providing a rotation stopper on the base.

Further, the power terminal 24 shown in FIG. 2 can be modified as shown in FIG. The power terminal 24 shown in FIG. 6A (plan view) is the same as the power terminal 2 shown in FIG.
4, the rotation stopper 24c is omitted. For example, if the screw attached to the screw tap 24a is small and the screw torque at the time of screw connection is small, it is possible to withstand a solder crack without the rotation stopper 24c, so that the configuration shown in FIG. Become.

The power terminal 2 shown in FIG. 6B (plan view)
Reference numeral 4 denotes a configuration in which the shape of the rotation stopper 24c provided on the power terminal 24 shown in FIG. 2 is cylindrical. Generally, in the work of providing a through hole in the printed board 22, it is easier and more efficient to make the through hole a circular cross section in plan view. Therefore, by forming the rotation stopper 24c in a cylindrical shape, the work of forming the through hole 38 for the stopper on the print substrate 22 can be simplified.

The power terminal 24 shown in FIGS. 6 (c1) (plan view), (c2) (perspective view) has a configuration in which the connection portion 24d has a quadrangular prism shape. With the configuration shown in FIGS. 6C1 and 6C2, since the connecting portion 24d itself functions as a rotation stopper, it is not necessary to provide the power terminal 24 with the rotation stopper 24c. In addition, the connection part 24d
Not only a square pillar, but also other shapes other than a cylinder,
For example, similar effects can be obtained if the cross section is a polygon, an ellipse, or any other shape. In this case, the print base 2
It is also necessary to provide a through hole 36 for the connection portion 2 corresponding to the shape of the connection portion 24d.

[0026]

As described above in detail, according to the present invention, a connection portion formed of a conductive member having substantially the same thickness as a substrate, which can be inserted into a through hole provided in the substrate, is provided.
By forming a screw tap in the connection part, it is connected to the wiring provided on the board by inserting the connection part into the through hole provided on the board, and in this state, a large current cord or bus bar is connected with the screw Can be connected. Since the connection part is almost the same thickness as the substrate, assemblability,
The connection height to the substrate can be reduced without sacrificing maintainability.

[Brief description of the drawings]

FIG. 1 shows a printed circuit board 22 that requires a large current using a power terminal 24 that is a connection terminal in the present embodiment;
Sectional drawing which shows the example of a connection with the large current output part.

FIG. 2 is a diagram showing a detailed configuration of a power terminal 24.

FIG. 3 is a plan view showing an example of a printed board 22 using the power terminal 24 shown in FIG.

FIG. 4 is a diagram showing an example of a state in which a bus bar 40 is connected to the printed board 22 using the power terminal 24.

FIG. 5 is a diagram showing another example of the connection terminal (dual power terminal 50, triple power terminal 53) in the embodiment.

FIG. 6 is a view showing another example of the connection terminal according to the embodiment;

FIG. 7 is a diagram showing an example of a conventional large current connection.

[Explanation of symbols]

 Reference Signs List 22 Printed substrate 24 Power terminal 24a Screw tap 24b Base 24c Rotation stopper 24d Connection 26 26 Through hole land 28 Screw 30 Cord 40 Bus bar 50 Dual power terminal 56 Triple power terminal

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hidenori Sadamori 1-term, Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa F-term in the Toshiba Komukai Plant (reference) 5E012 BA12 BA14 5E077 BB02 BB11 BB18 BB31 CC22 CC30 DD01 DD13 EE03 EE09 FF30 JJ05 JJ14 JJ20 JJ30

Claims (3)

[Claims] 1. A connection part formed of a conductive member having a thickness substantially equal to that of a substrate and capable of being inserted into a through hole provided in the substrate, wherein a screw tap is formed in the connection part. Connection terminal. 2. An engagement member coupled to the connection portion by a base portion, the engagement member being engaged with the substrate when the connection portion is inserted into a through hole provided in the substrate. Item 1. The connection terminal according to Item 1. 3. The connection terminal according to claim 1, wherein the plurality of connection portions are connected by one base.