JP3518180B2 - Male terminal fitting and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting formed by integrating a metal pin with a terminal body made of a metal plate and a method for manufacturing the terminal fitting.

[0002]

2. Description of the Related Art Since this type of male terminal fitting uses a metal pin, it has the advantage that it can be downsized while ensuring sufficient strength, and the structure shown in FIG. 8 has become publicly known. There is. This is a structure in which a rectangular tube portion 3 is formed on a terminal main body portion 2 having a wire barrel 1, and a metal pin 4 is welded or fixed thereto by caulking. An electric wire (not shown) is caulked and fixed to the wire barrel 1. Connected.

[0003]

However, in the male terminal fitting having the above structure, the terminal is composed of two parts, the terminal body 2 made of a metal plate and the metal pin 4, and the metal pin 4 is electrically It will be connected to the electric wire through two connecting portions of the welded portion (crimped portion) and the crimped portion of the wire barrel 1.

For this reason, there is a possibility that contact failure may occur at each connection portion, and electrical performance may be degraded.

The present invention has been made in view of the above circumstances, and an object thereof is to integrate a contact terminal portion such as a metal pin or the like into a terminal body, but to prevent a contact failure or the like from easily connecting to an electric wire. An excellent terminal fitting and a manufacturing method thereof are provided.

[0006]

A male terminal fitting according to a first aspect of the present invention comprises a terminal main body portion which is made of a conductive metal plate material and has a wire barrel portion for caulking and fixing a core wire of an electric wire. Is a male side terminal fitting that is integrated with a contact terminal portion that is inserted into a female terminal and that is made of a metal pin, the proximal end portion of the contact terminal portion extending to the wire barrel portion, and being caulked and fixed with the electric wire. And on the terminal body
Is an auxiliary caulk fixed by caulking to the middle part of the contact terminal part.
The front of this auxiliary caulking part is
There is a taper that surrounds the contact terminal and
Between the taper portion and the auxiliary crimping portion and the contact
The base end of the crimping fixing part for the middle part of the terminal is
The feature is that the notch is made in the depth direction .

A method for manufacturing a male terminal fitting according to claim 2
Is made of conductive metal plate material and caulks the core of the wire
A terminal body portion having a wire barrel portion for
Contact part that consists of a flexible metal pin and is inserted into the female terminal
A method of manufacturing a male terminal fitting that integrates
Near the tip of the terminal body, the middle of the contact terminal
The auxiliary caulking part that is caulked to the
And a tapered portion surrounding the contact terminal portion is provided.
Between the taper and the auxiliary crimp
And the crimping fixing portion for the intermediate portion of the contact terminal portion
A notch is made in the height direction at the base end of the
By crimping the intermediate portion of the contact terminal portion to the auxiliary crimping portion,
Then, the base end of the contact terminal portion is connected to the wire barrel portion.
Is characterized in that it is caulked and fixed together with the electric wire .

[0008]

[0009]

[0010]

According to the male side terminal fitting of the first aspect and the manufacturing method of the second aspect, since the core wire of the electric wire is caulked and fixed to the contact terminal portion, the core wire directly contacts the contact terminal portion. As a result, poor contact is unlikely to occur, and a good electrical connection between the electric wire and the contact terminal portion can be obtained. In addition,
The contact terminal is integrated with the terminal body, and
Since the wire is caulked to the terminal body, caulking the wire
The contact terminal can be stabilized when fixing, and
A crimped state is obtained.

Further, according to the male terminal fitting of claim 2 and the manufacturing method of claim 4, the contact terminal portion is previously integrated with the terminal body portion, and in that state, the electric wire is caulked and fixed to the terminal body portion. Therefore, the contact terminal portion can be stabilized when caulking the electric wire, and a reliable caulking state can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIGS.

FIG. 1 shows the male terminal fitting 20 according to the present invention housed in a connector housing 10. In the connector housing 10, for example, a hood portion 11 is formed on the left side in the drawing, and cavities 12 that open into the hood portion 11 are formed in upper and lower two stages. A locking projection 13 for locking the male terminal fitting 20 is provided in the cavity 12, and a partition wall portion 15 having a through hole 14 is formed at the end of the hood portion 11 side.

Next, the male terminal fitting 20 will be described in detail. This is, for example, a terminal main body 30 formed by bending a copper alloy plate material, and a contact terminal to be inserted into a mating female terminal fitting (not shown). And a contact terminal portion 40 thereof.
Is made of, for example, a square pin made of copper alloy and has a tapered tip. Insulation barrel 3 for crimping and fixing the electric wire 70 together with the insulation coating to the latter half of the terminal body 30.
1 and a wire barrel 32 located at the tip end side thereof for crimping and fixing the core wire 71 of the electric wire 70 are formed. Further, in the front half of the terminal body portion 30, a tapered portion 33 surrounding the periphery of the contact terminal portion 40 in order from the front end side to the rear side.
A pair of auxiliary caulking portions 34, which are in close contact with and fixed to the contact terminal portion 40, and a square tubular portion 35, through which the contact terminal portion 40 is inserted, are formed.

The rear end of the contact terminal portion 40 extends to the inside of the wire barrel 32, where it is caulked together with the core wire 71 of the electric wire 70.

A protective cover 60 is attached to the front half of the male terminal fitting 20 by fitting it into the square tube portion 35. The protective cover 60 is formed by bending a plate material of, for example, stainless steel, which has higher rigidity than the copper alloy forming the male terminal fitting 20, into a rectangular tube shape, and the rectangular tubular portion 35 of the male terminal fitting 20. The engaging piece 61 is bent and fixed to the male side terminal fitting 20 in a state of being fitted to. Also,
A lance 62 is formed in a cut-and-raised shape on the upper surface of the protective cover 60. When the male side terminal fitting 20 is inserted into the cavity 12, the lance 62 engages with the locking projection 13 of the connector housing 10. The male terminal fitting 20
Are fixed in the connector housing 10.

Next, a method of manufacturing the male terminal fitting 20 having the above structure will be described. First, for example, a square pin made of copper alloy is cut to the required size, and the tip is tapered,
The contact terminal portion 40 is manufactured by forming the concave portion 41 on the side wall portion. Separately from this, for example, a plate material made of a copper alloy having excellent conductivity is punched into a desired shape and is bent to manufacture the terminal main body 30 shown in FIGS. 3 and 4. In this process, the above-mentioned contact terminal portion 40 is supplied from above to be inserted into the taper portion 33 and the rectangular tube portion 35 so as to be positioned inside the terminal body portion 30, and the pair of auxiliary caulking portions 34 are bent together therewith. Then, the contact terminal portion 40 is crimped so as to be wound around the portion where the recess 41 is formed. As a result, the terminal body portion 30 and the contact terminal portion 40 are integrated.

Then, the caulking machine is next provided with a core wire 7 at the tip.
1 is supplied (see FIG. 5), the core wire 71 is caulked to the wire barrel 32 of the terminal body 30, and the tip of the insulating coating is caulked to the insulation barrel 31. Ends.

According to the structure and the manufacturing method of this embodiment, the core wire 71 of the electric wire 70 is caulked to the terminal body portion 30 at the wire barrel 32 portion together with the rear end portion of the contact terminal portion 40. Therefore, the core wire 71 is in a state of directly contacting the contact terminal portion 40, and is electrically conducted with certainty,
Problems such as poor contact and increased resistance can be reliably prevented. Moreover, particularly in the present embodiment, the contact terminal portion 40 is previously integrated by the auxiliary crimp portion 34 of the terminal body portion 30, and the electric wire 70 is caulked and fixed to the terminal body portion 30 in that state. At the same time, the posture of the contact terminal portion 40 can be stabilized, and an effect of being in a reliable crimped state and electrically stable is obtained.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above embodiment, the protective cover 60 is fitted to the male terminal fitting 20, but this is not essential and can be omitted. In that case, a lance may be formed by cutting and raising in the terminal main body portion 30, or an engagement hole with which a resin lance provided on the connector housing side is engaged may be formed. (2) In the above-described embodiment, the contact terminal portion 40 is a square pin, but the present invention is not limited to this, and only the tip side may be a square pin, and the rear side may be a pin with chamfered corners so as to easily contact the core wire 71 ( (See FIG. 7).

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a male terminal fitting of the present invention housed in a connector housing.

[Figure 2] Similarly, a front view of the male terminal fitting

FIG. 3 is a sectional view of the male terminal fitting along the line AA in FIG.

[Fig. 4] Side view of the male terminal fitting

FIG. 5 is a sectional view of the male-side terminal fitting before caulking and fixing the electric wire, taken along line BB in FIG.

FIG. 6 is a sectional view of the wire barrel portion of the male terminal fitting.

FIG. 7 is a cross-sectional view of a wire barrel portion of a male terminal fitting according to another embodiment.

FIG. 8 is a perspective view showing a conventional male terminal fitting.

[Explanation of symbols]

20 ... Male side terminal fitting 30 ... Terminal body 31 ... Insulation barrel 32 ... Wire barrel 34 ... Auxiliary caulking section 40 ... Contact terminal 70 ... Electric wire 71 ... Core wire

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01R 13/04 H01R 4/18 H01R 43/048

Claims (2)

(57) [Claims] 1. A terminal main body portion made of a conductive metal plate material and having a wire barrel portion for crimping and fixing a core wire of an electric wire, and a contact terminal portion made of a conductive metal pin to be inserted into a female terminal. In the integrated male side terminal fitting, the base end portion of the contact terminal portion extends to the wire barrel portion and is caulked and fixed with the electric wire, and the terminal main body portion is caulked at an intermediate portion of the contact terminal portion.
There is an auxiliary caulking part that is fixed, and this auxiliary
A taper surrounding the contact terminal portion is provided in front of the caulking portion.
And a tapered portion and the auxiliary crimping portion.
Between the contact terminals and the intermediate portion of the contact terminal portion.
There is a notch in the height direction at the base end of the fixed part.
The male-side terminal fitting that is characterized by 2. A terminal main body portion made of a conductive metal plate material and having a wire barrel portion for crimping and fixing a core wire of an electric wire; and a contact terminal portion made of a conductive metal pin to be inserted into a female terminal. A method of manufacturing an integrated male side terminal fitting , wherein the contact terminal portion has an intermediate portion near the tip of the terminal main body portion.
The auxiliary caulking part that is caulked to the
And a tapered portion surrounding the contact terminal portion is provided.
Between the taper and the auxiliary crimp
And the crimping fixing portion for the intermediate portion of the contact terminal portion
A notch is made in the height direction at the base end of the position, and the intermediate portion of the contact terminal portion is caulked to the auxiliary caulking portion.
The contact terminal and then attach the base end of the contact terminal to the wire bar.
A method for manufacturing a male-side terminal fitting , comprising caulking and fixing together with the electric wire in a rel section .