JP2005183298A - Terminal fitting, terminal material, and manufacturing method of terminal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve terminal holding force without changing the shape. <P>SOLUTION: A terminal fitting 10 is obtained by cutting off a first linking part 21 and a second linking part 22 after applying plating treatment on the whole of the chain terminal 20 punched out in a prescribed shape. The terminal fitting 10 is provided respectively with a substrate connection part 11 with a printed-circuit board on one end, a terminal connection part 12 with an opposite terminal on the other end, and a press-fit part 13 to be pressed in a hole 31 of a connector housing 30 on the way. The second linking part 22 is constructed including the press-fit part 13, and the press-fit part 13 is formed as a fractured face by the cut-off of the second linking part 22. Thereby, since friction force between the press-fit part 13 and the hole wall of the connector housing 30 increases, terminal holding force is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a terminal fitting, a terminal material, and a method for manufacturing the terminal fitting.

  Conventionally, for example, a terminal fitting in a board connector has been obtained by using a conductive metal plate material plated on a surface and punching the plated metal plate material into a predetermined shape by a press. In the case of punching with a press, a non-plated fracture surface is exposed to the outside, and this non-plated fracture surface has a problem of poor contact reliability because of low adhesion to solder.

For this reason, as shown in FIG. 4, at least solder which is soldered by punching a non-plated metal plate material into a predetermined shape to form the chain terminal 1 and then plating the entire chain terminal 1. A technique for preventing the fracture surface from being generated in the attaching portion 2 is already known (see, for example, Patent Document 1 below).
JP 2003-31333 A

By the way, in the above case, since plating is performed on the whole including the part other than the soldering part 2, a plating film is also formed on the press-fitting part 3 that is press-fitted into the hole of the connector housing (not shown). Will be. Therefore, when the press-fitting portion 3 on which the plating film is formed is press-fitted into the hole of the connector housing, since the surface roughness of the press-fitting portion 3 is fine, the frictional force between the press-fitting portion 3 and the hole wall of the connector housing is reduced. There is a concern that the holding power to the terminal fitting becomes weaker as it becomes smaller.
As a countermeasure, it is conceivable to make the shape of the hole wall of the press-fit portion 3 or the connector housing such that the frictional force increases, but it is difficult to manufacture such a shape on the hole wall, In addition, if such a shape is provided in the press-fitting portion 3, there is a risk of damaging the hole wall of the connector housing, so neither is a good solution.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve the terminal holding force without changing the shape of the terminal fitting.

  As a means for achieving the above object, the invention of claim 1 is characterized in that a conductive metal plate is punched to form a terminal material, and after plating the entire terminal material, unnecessary portions of the terminal material are removed. It is a terminal metal fitting obtained by cutting, each having a connection part on both ends, a press-fitting part that is press-fitted into the hole of the connector housing in the middle, the unnecessary part is configured including the press-fitting part, The press-fit portion is characterized in that it is formed as a fracture surface by cutting off the unnecessary portion.

  The invention of claim 2 is a terminal material which is formed by punching a conductive metal plate and plated after the punching, and a plurality of terminal bodies arranged side by side at intervals, Before the plating is arranged between adjacent terminal bodies to connect the terminal bodies to each other, and after the plating is provided with an unnecessary part that is cut off and separates the terminal bodies from each other, the unnecessary part, It is configured to include a press-fit portion that is press-fitted into the hole of the connector housing, and is characterized in that the press-fit portion is exposed as a fracture surface by being cut off.

  The invention of claim 3 is a method of manufacturing a terminal fitting, which is a terminal material provided with an unnecessary portion including a press-fit portion press-fitted into a hole of a connector housing by punching out a conductive metal plate. Then, after plating the entire terminal material, the unnecessary portion of the plated terminal material is cut off to expose the press-fitted portion as a fracture surface.

<Invention of Claim 1>
Since the entire terminal material is plated, a plating film is formed on the surface of the connecting portion, and the contact reliability with the mating terminal or circuit can be improved. On the other hand, since the press-fitting part is formed as a fracture surface by cutting off an unnecessary part of the plated terminal material, the frictional force with the hole wall of the connector housing is increased and the terminal holding force can be improved. Moreover, such an effect can be achieved without changing the original shape of the terminal fitting.

<Invention of Claim 2>
Since the terminal material has a plurality of terminal bodies and unnecessary parts that connect adjacent terminal bodies to each other, and the press-fitting part is formed by cutting out the unnecessary part, the part for forming the press-fitting part is between the terminal bodies It will also have the function to connect. Therefore, it is not necessary to independently secure a portion for forming the press-fitting portion in the terminal material, which is excellent in material removal.

<Invention of Claim 3>
After punching out a conductive metal plate to form a terminal material and plating the entire terminal material, the unnecessary part of the plated terminal material is cut off to expose the press-fit part as a fracture surface. A terminal fitting with improved characteristics can be easily manufactured without changing the shape of the terminal fitting of the main body.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a view showing a chain terminal 20 (corresponding to the terminal material of the present invention) for forming the terminal metal fitting 10 according to the present embodiment, and the terminal metal piece 10 is cut by cutting along the one-dot chain line in the figure. Is obtained.

  The terminal fitting 10 is extended from one end to the other end by punching out a conductive metal plate material, and has a board connection portion 11 for a printed circuit board (not shown) at one end and a terminal connection for the other terminal at the other end. The part 12 is provided with a press-fitting part 13 that is press-fitted into the hole 31 of the connector housing 30 halfway from one end to the other end. That is, the terminal fitting 10 is configured as a board terminal, the press-fitting portion 13 is fixed to the connector housing 30 by press-fitting, and the board connection portion 11 is inserted into a terminal insertion hole of a printed board (not shown) and connected to the circuit by soldering. It has come to be.

  In the middle of the length direction of the terminal fitting 10, a wide portion 14 formed to be wide is formed, and the press-fit portions 13 are formed on both side edges of the wide portion 14. The wide portion 14 has substantially the same cross-sectional shape as the inside of the hole 31 of the connector housing 30, and is fitted tightly into the hole 31. Positioning protrusions 15 are formed on both side edges of the wide portion 14 above the press-fit portion 13 so as to project outward. As shown in FIG. 2, when the press-fitting portion 13 is press-fitted into the hole 31 of the connector housing 30, the positioning projection 15 is abutted against the opening edge 32 of the hole 31 to place the terminal fitting 10 in a normal press-fitting position. It is supposed to be retained.

Of the both side edges of the wide portion 14, the portion below the press-fit portion 13 is gradually narrowed toward the substrate connecting portion 11, and continues to the substrate connecting portion 11 at the narrowest width. The board connecting portion 11 is formed narrow with a constant width dimension, and can be inserted into the terminal insertion hole of the printed board from the tapered tip end portion 11A. Further, above the wide portion 14, a terminal connection portion 12 that is smaller than the wide portion 14 but has a slightly larger width dimension than the substrate connection portion 11 is connected. The terminal connection portion 12 is formed so as to protrude into a hood (not shown) of the connector housing 30 by fixing the terminal fitting 10 to the connector housing 30, and is electrically connected to the mating terminal of the mating connector housing fitted to the hood. Connected.
As will be described later, the terminal metal fitting 10 has plating films formed on the entire surface (both front and back surfaces and fractured surface) of the substrate connection portion 11 and both front and back surfaces of the wide portion 14, while the press-fitting portion 13 and the positioning protrusion 15 are provided. The plating film is not formed on the edge, and the fracture surface remains unchanged.

  Next, the structure of the chain terminal 20 will be described. The chain terminal 20 is formed by punching a non-plated conductive metal plate, and as shown in FIG. 1, a plurality of terminal bodies 10 (two in the illustrated case) are aligned side by side with a predetermined interval. ), A strip-shaped first connecting portion 21 that extends in the direction in which the terminal main bodies 10 are arranged and connects both side edges of the adjacent terminal connecting portions 12 to each other, and the first connecting portion 21 is arranged substantially in parallel. Similarly, a belt-like second connecting portion 22 (corresponding to an unnecessary portion of the present invention) that connects both side edges of adjacent wide portions 14 to each other is provided. And the board | substrate connection part 11 is obtained with the substantially same external shape as a completed product by said punching. Since the terminal main body is a portion that is supposed to be the terminal fitting 10, the same reference numerals as those of the terminal fitting 10 are given in FIG. Further, in FIG. 1, only two terminal bodies 10 are shown, but actually, a plurality of terminal bodies 10 (not shown) are connected in the same arrangement pattern on both sides of the two terminal bodies 10.

  The first connecting portion 21 and the second connecting portion 22 function as carriers for holding the terminal bodies 10 side by side at regular intervals. Of these, the second connecting portion 22 is a wide portion. 14 is formed long along both side edges, and includes not only both side edges of the positioning projection 15 but also the press-fit portion 13. In this regard, in the conventional case shown in FIG. 4, only the portion corresponding to the second connecting portion 22 is formed only in the portion corresponding to the positioning protrusion 15, and is different in form from this embodiment. .

  The chain terminal 20 is plated after being punched out, and the first connecting portion 21 and the second connecting portion 22 of the plated chain terminal 20 are shown in FIG. Cut along the chain line, and along with this cutting, both side edges of the positioning projection 15 and the press-fit portion 13 are exposed. Therefore, both side edges of the press-fit portion 13 and the positioning projection 15 have a structure that does not allow the plating material to enter due to the second connecting portion 22, so that no plating film is formed and exposed as a fracture surface.

  Next, the manufacturing method and operation of the terminal fitting 10 will be described. First, a conductive metal plate whose surface is not plated is punched out into a shape shown in FIG.

  Subsequently, plating such as electroplating is performed on the entire chain terminal 20 to form a plating film on the surface of the chain terminal 20. And the 1st connection part 21 and the 2nd connection part 22 are cut | disconnected and removed along the dashed-dotted line shown in FIG. 1 with respect to the chain terminal 20 in which the plating film was formed, and the terminal metal fitting of the state isolate | separated 10 is formed. Thus, the terminal fitting 10 obtained as a finished product includes a side edge of a part of the terminal connection portion 12 corresponding to the first connection portion 21, a side edge of the press-fit portion 13 and the positioning projection 15 corresponding to the second connection portion 22. Are formed as a fracture surface, and the remaining portion is formed with the plating film remaining.

  As a result, when the terminal fitting 10 is fixed to the connector housing 30, as shown in FIG. 3, the press-fitted portion 13 having a fractured surface comes into contact with the hole wall of the connector housing 30, and the frictional force therebetween. Therefore, the holding force with respect to the terminal fitting 10 is improved. On the other hand, when the terminal fitting 10 fixed to the connector housing 30 is soldered to the printed board, the plated board connecting portion 11 is brought into contact with the circuit of the printed board to realize a good connection state. Contact reliability will be improved.

  Moreover, when making the press-fit part 13 into a fractured surface, since the excision of the second connection part 22 having a connection function between the terminal bodies 10 is used, the press-fit part 13 is formed in the chain terminal 20. There is no need to secure the parts independently, and the material is excellent. As described above, it is possible to obtain the terminal fitting 10 whose characteristics are easily improved without changing the shape of the terminal fitting 10.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the above-described embodiment, an example in which the terminal fitting is applied to a substrate terminal is shown. However, in the present invention, for example, the terminal fitting may be applied to a relay terminal. In short, it is only necessary to have a terminal fitting provided with a connecting part at both ends and a press-fitting part that is press-fitted into the hole of the connector housing halfway.

  (2) In the above embodiment, the second connecting portion is cut out in order to make the press-fitted portion a fracture surface. However, in the present invention, a portion that does not have a connecting function such as the second connecting portion is cut out. It may be a broken surface.

The top view of the chain terminal concerning the embodiment of the present invention Sectional view showing the terminal fitting press-fitted into the connector housing 2 is an enlarged view of the main part of FIG. Plan view of conventional chain terminal

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting, terminal main body 11 ... Board | substrate connection part 12 ... Terminal connection part 13 ... Press-fit part 20 ... Chain terminal (terminal material)
21 ... 1st connection part 22 ... 2nd connection part (unnecessary part)

Claims (3)

A terminal fitting obtained by punching a conductive metal plate to form a terminal material, plating the entire terminal material, and then cutting off unnecessary portions of the terminal material,
Provided with connection parts on both ends, and press-fitting parts that are press-fitted into the hole of the connector housing in the middle,
The said unnecessary part is comprised including the said press-fit part, and the said press-fit part is formed as a torn surface by cutting off the said unnecessary part, The terminal metal fitting characterized by the above-mentioned. It is a terminal material that is formed by punching a conductive metal plate and plated after this punching,
A plurality of terminal bodies arranged side by side at intervals, and before the plating, arranged between adjacent terminal bodies to connect each terminal body to each other, and after the plating, the terminal bodies are cut off With unnecessary parts separated from each other,
The said unnecessary part is comprised including the press-fit part press-fitted in the hole of a connector housing, and the said press-fit part is exposed as a fracture surface by being cut off, The terminal raw material characterized by the above-mentioned. By punching out a conductive metal plate, a terminal material having unnecessary portions including a press-fit portion to be press-fitted into the hole of the connector housing was formed, and then the entire terminal material was plated. Thereafter, the unnecessary portion of the plated terminal material is cut off to expose the press-fitted portion as a fracture surface.

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