JPH10162874A - Terminal metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely hold a wire. SOLUTION: A wire bending part 40 is provided between a crimp part 20 for crimping a wire, and a barrel part 30 to fix the wire by caulking. In the wire bending part 40, an upper protruded part 41 is formed by punching the right and the left side plates 21, and a lower protruded part 42 is formed by punching the bottom surface 23. After the wire is crimped by the crimp part 20, it is pushed to bend downward by the upper protruded part 41, and pushed to bend upward by the lower protruded part 42, so the wire is pushed to bend in a clamp form between the crimp part 20 and the barrel part 30. The wire is thus held by the barrel part 30, and the protruded parts 41, 42 regulate motion of it to against pulling tension of the wire, thereby the wire can be more securely held.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a terminal fitting,
Particularly, the present invention relates to an improved electric wire holding structure.

[0002]

2. Description of the Related Art FIG. 11 shows a general pressure contact type terminal fitting. The terminal fitting is provided with a press-contact portion 1 for pressing the core wire of the electric wire W and a barrel portion 2 for fixing the electric wire W. The press contact portion 1 is provided with a pair of press contact blades 3 at the front and rear by bending both front and rear edges of the left and right side plates 5 so as to face inward. And
When the electric wire W is pushed into between the press contact blades 3, the press contact blade 3 cuts into the covering portion of the electric wire W and comes into contact with the core wire. The barrel portion 2 is provided with a barrel piece 4 that projects slightly upward and downward while being slightly shifted back and forth, and by crimping the barrel piece, the electric wire W is fixed to the terminal fitting. In addition, this barrel piece 4
It is a so-called staggered type barrel piece which is in a state of being covered so as to suppress the rise of the electric wire W in a crimped state.

[0003]

However, the barrel piece 4
It is not always safe to hold the electric wire W simply by swaging. If the electric wire W is strongly pulled, the pulling force acts on the press-contact blade 3, and there is a possibility that the press-contact blade 3 is deformed. In particular, since the staggered type barrel piece is generally considered to have a weaker holding force than a so-called bite type barrel piece that caulks the barrel piece into an electric wire, such a problem is regarded as very important. Was. The present invention
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal fitting capable of reliably holding an electric wire.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a terminal fitting having a connecting portion which can be fitted to a mating terminal fitting at a front end thereof, and a wire covering behind the connecting portion. The terminal fitting is provided with a pressure contact portion for cutting the wire and conducting with the core wire, and further provided with a fixing portion for holding the wire coating behind the terminal, and a wire is provided between the press contact portion and the fixing portion. It is characterized in that one or more protrusions for bending and arranging are formed.

According to a second aspect of the present invention, there is provided the terminal fitting according to the first aspect, wherein the protrusions are arranged at different positions in the front-back direction and in the height direction.

According to a third aspect of the present invention, there is provided the terminal fitting according to the second aspect, wherein the upper one of the protrusions is bent after the wire is pushed into the press-contact portion to bend the wire in the pushing-down direction. It has features.

[0007]

According to the first aspect of the present invention, after the electric wire is pressed against the press contact portion, it is pushed and bent by the protrusion, and is thereafter held by the fixing portion. Thus, when the electric wire is pulled, the electric wire is not only held by the fixing portion, but also the movement in the pulling direction is restricted by the engagement with the protrusion. Therefore, the provision of the protruding portion makes it possible to more reliably hold the electric wire together with the fixing portion against pulling.

According to the second aspect of the present invention, since the projecting portions are arranged at different positions in the front-back direction and in the height direction, the electric wire is pressed and bent in a crank shape between the press-contact portion and the fixing portion. become. Therefore, the wire can be more resistant to pulling than when it is simply bent, so that the electric wire can be more securely held.

According to the third aspect of the present invention, the upper-side protrusion is bent after the electric wire is pressed against the press-contact portion. Can be prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of a terminal fitting according to the present invention will be described below with reference to FIGS.
The terminal fitting of this embodiment is a female terminal fitting F, which is formed by bending a conductive metal plate. As shown in FIG. 4, on the front side of the female terminal fitting F, a connecting part 10 for inserting a counterpart terminal fitting (not shown) is provided, and on the rear side, a press contact part 20 for pressing the electric wire W and A barrel portion 30 for caulking the covering portion of the electric wire W is provided. Further, an electric wire bending part 40 is provided between the press contact part 20 and the barrel part 30.

The connecting portion 10 is formed in a rectangular tube shape.
An elastic contact piece 11 is provided in the inside thereof by folding the leading edge. A mating terminal fitting inserted through the opening on the front end side makes elastic contact with the elastic contact piece 11. The ceiling of the connection part 10 is double folded,
A lance 13 is cut and raised obliquely rearward on the outer ceiling plate 12, and the left edge of the stabilizer 1 is bent upward at a substantially right angle to form the stabilizer 1.
4 are formed.

The pressure contact portion 20 is formed in a groove shape which is continuous with the rear end of the connection portion 10 and has an open upper surface. A pair of press-contact blades 22 cut and raised inward facing each other are provided on front and rear sides of both side plates 21 disposed on both left and right sides of the press-contact portion 20. Then, when the electric wires W are pushed between the opposing press contact blades 22, each press contact blade 22 cuts into the covering portion of the electric wire W and comes into contact with the core wire.

The wire bending portion 40 is formed in a groove shape which is continuous with the rear end of the press contact portion 20 and has an upper surface opened like the press contact portion 20. As shown in FIG. 1, upper left and right side plates 21 are provided with upper protrusions 41 opposed to each other.
Behind 1, a lower projection 42 is arranged on the bottom surface 23.
The upper protruding portion 41 is formed in a triangular shape protruding downward from the left and right side plates 21 by being punched inward from the outside. The lower end surface of the upper protrusion 41 is located at a position lower than the upper surface of the electric wire W when the electric wire W pressed into contact with the press contact portion 20 is drawn straight backward. Lower projection 42
Are pressed out from the outside to the inside on the bottom surface 23 to form a triangular shape, and push up the electric wire W pressed against the press contact portion 20.

The barrel portion 30 is connected to the rear end of the wire bending portion 40 and has barrel pieces 31 projecting upward on both left and right sides.
It is comprised including. By crimping each barrel piece 31, the electric wire W can be fixed to the female terminal fitting F. Further, each barrel piece 31 is located at a position slightly shifted back and forth, and each barrel piece 31 is covered so as to suppress the floating of the electric wire W in a crimped state. The so-called barrel pieces 31 are staggered barrel pieces. The barrel portion 30 is not limited to the staggered type barrel piece 31, but is a so-called bite type in which each barrel piece is arranged at a position facing each other without shifting back and forth, and each barrel piece is swaged into the electric wire W. Barrel pieces.

Next, the work of connecting the electric wire W to the female terminal fitting F will be described. In order to connect the electric wire W to the female terminal fitting F, first, the terminal of the electric wire W is placed so as to bridge between the front and rear press contact blades 22 in the press contact portion 20, and the terminal of the electric wire W is placed between the press contact blades 22. Push in. Thereby, each press contact blade 22 cuts into the covering portion of the electric wire W and comes into contact with the core wire.

Subsequently, the rear portion of the wire W pressed against the press-contact portion 20 is pushed into the wire bending portion 40. Then, the electric wire W
Is guided by the outer edge of the upper protrusion 41 and enters below the lower end surface thereof. In addition, the electric wire W is pushed upward by the lower protrusion 42 behind the electric wire W. As a result, the pressing portion 30
The wire W pressed into contact is bent downward by the upper protrusion 41 and then further bent upward by the lower protrusion 42. That is, after being press-contacted to the press-contact portion 30, the wire W is pushed and bent in the wire bending portion 40 in a crank shape (see FIG. 3).

Then, each barrel piece 31 is swaged with respect to the electric wire W bent and bent in a crank shape. Then, each barrel piece 31 is in a state of being covered so as to suppress the floating of the electric wire W, and the electric wire W is fixed (see FIG. 2). With this, the connection work of the electric wire W is completed.

Here, looking at the electric wire W which is pushed and bent in a crank shape, since the contact portion thereof is pushed and bent with respect to each of the projections 41 and 42, the contact portion is pulled when the electric wire W is pulled. The rearward movement of the electric wire W is restricted by engaging with the projections 41 and 42. Accordingly, when the wire W is pulled, the wire W is not only held by the barrel portion 30 but also held by the wire bending portion 40, so that the holding of the wire W is more reliable. As a result, it is possible to prevent a tensile force from acting on each of the press contact blades 22 and to prevent deformation of the press contact blades 22.

<Second Embodiment> Hereinafter, a second embodiment of the terminal fitting of the present invention will be described with reference to FIGS. The difference between the present embodiment and the first embodiment lies in the configuration of the electric wire bending portion 50, and the other portions are the same as those in the first embodiment. .

As shown in FIG. 5, the upper projecting portion 51 is formed by cutting the right and left side plates 21 inward facing each other. The cut and raised upper protrusion 51 forms a triangular piece,
It protrudes obliquely from the rear toward the lower front. Also,
The position of the lower edge of the upper protruding portion 51 is lower than the upper surface of the electric wire W when the electric wire W pressed against the press contact portion 20 is drawn straight backward. Lower projection 5
2 is formed on the bottom surface 23 in the same manner as in the first embodiment, and is punched out from the outside to the inside to form a triangular shape.

As a result, when the rear portion of the wire W pressed against the press contact portion 20 is pushed into the wire bending portion 50, the wire W
Is guided downward along the outer edge of the upper protrusion 51 and enters below the lower edge. Further, the rear portion is pushed upward by the lower projection 52. That is, the press contact portion 2
After being pressed to zero, the wire W is bent and bent in a crank shape at the wire bending portion 50 (see FIG. 6). Therefore, also in this embodiment, since the electric wire W is pressed and bent between the press contact portion 20 and the barrel portion 30 in a crank shape, each of the protrusions 51 and 52 is formed.
Regulates the movement of the electric wire W against the pull, and the barrel portion 3
With 0, the holding of the electric wire W can be ensured.

<Third Embodiment> A third embodiment of the terminal fitting of the present invention will be described below with reference to FIGS. The difference between the present embodiment and the first embodiment lies in the configuration of the wire bending portion 60, and the other portions are the same as those in the first embodiment. .

As shown in FIG. 7, the upper projection 61 is formed by bending the rear edges of the left and right side plates 21 so as to face inward. The bent upper protruding portion 61 projects substantially at right angles to the side plate 21, and an edge of the protruding side is cut off obliquely. In addition, the position of the lower edge of the upper protruding portion 61 is lower than the upper surface of the electric wire W when the electric wire W pressed against the press contact portion 20 is drawn straight backward. The lower protrusion 62 is provided in the first
Similarly to the embodiment, it is formed on the bottom surface 23 and is struck from the outside to the inside to form a triangular shape.

Also in the present embodiment, when the rear portion of the wire W pressed against the press contact portion 20 is pushed into the wire bending portion 60, the wire W enters the lower side of the upper protrusion 61, and the rear portion further lowers. The wire 62 is pushed upward by the protrusion 62, and the wire W is pushed and bent in a crank shape (see FIG. 8). Therefore, also in the present embodiment, the electric wire W is connected to the press contact portion 20 and the barrel portion 3.
0, so that each projection 6
1, 62 restricts the movement of the electric wire W against the pulling, and the holding of the electric wire W together with the barrel 30 can be ensured.

<Fourth Embodiment> A fourth embodiment of the present invention will now be described with reference to FIGS. 9 and 10. FIG. The difference between the present embodiment and the first embodiment lies in the configuration of the wire bending portion 70, and the other portions are the same as those in the first embodiment. .

As shown in FIG. 9, the upper protruding portion 71 is formed by folding the upper edges of the rear ends of the left and right side plates 21 inward, and the position of the lower edge is pressed against the pressure contact portion 20. The position is lower than the upper surface of the electric wire W when the electric wire W is drawn straight backward. Lower projection 72
Are formed on the bottom surface 23 in the same manner as in the first embodiment, and are punched out from the outside to the inside to form a triangular shape.

Also in this embodiment, when the rear portion of the wire W pressed against the press contact portion 20 is pushed into the wire bent portion 70, the wire W enters the lower side of the upper protrusion 71, and the rear portion is further lower. The wire W is pushed upward by the protrusion 72, and the electric wire W is pushed and bent in a crank shape (see FIG. 10). Therefore, also in the present embodiment, the electric wire W is connected to the press contact portion 20 and the barrel portion 3.
0, so that each projection 7
1, 72 restricts the movement of the electric wire W against the pulling, and the holding of the electric wire W together with the barrel portion 30 can be ensured.

The present invention is not limited to the above-described embodiment, but can be modified as follows, for example, and these embodiments also belong to the technical scope of the present invention. (1) In each of the above embodiments, the upper protrusions 41, 51, 6
1, 71 and the lower protrusions 42, 52, 62, 72 are provided so that the electric wire W can be pushed and bent in a crank shape. However, even if only the upper protrusion or the lower protrusion is provided. Good. In other words, the wire may be bent along the length direction, for example, as long as the wire can be bent after pressing the wire against the press-contact portion.

(2) In the third and fourth embodiments, the upper protruding portions 61 and 71 are already bent at the time of pressing the electric wire. However, the upper projecting portions 61 and 71 may be bent after pressing the electric wire to the press-contact portion. Good. Accordingly, the upper protrusion does not hinder the pressing operation of the electric wire, and the pressing operation can be performed smoothly.

(3) In each of the above embodiments, the present invention is applied to the female terminal fitting F, but may be applied to the male terminal fitting. In addition, the present invention can be implemented with various modifications without departing from the scope.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wire bending portion of a first embodiment.

FIG. 2 is a top view showing a wire bending portion of the embodiment.

FIG. 3 is a side sectional view showing a wire bending portion of the embodiment.

FIG. 4 is a perspective view showing the entire terminal fitting of the embodiment.

FIG. 5 is a perspective view illustrating a wire bending portion according to a second embodiment.

FIG. 6 is a side sectional view showing a wire bending portion of the embodiment.

FIG. 7 is a perspective view showing a bent portion of an electric wire according to a third embodiment.

FIG. 8 is a side sectional view showing a wire bending portion of the embodiment.

FIG. 9 is a perspective view showing a wire bending portion of a fourth embodiment.

FIG. 10 is a side sectional view showing a wire bending portion of the embodiment.

FIG. 11 is a partially enlarged perspective view showing a conventional example.

[Explanation of symbols]

 Reference numeral 20: press-contact portion 30: barrel portion (fixed portion) 41, 51, 61, 71: upper protrusion (projection) 42, 52, 62, 72: lower protrusion (projection) W: electric wire F: female type Terminal fittings (terminal fittings)

Continued on the front page (72) Inventor Keigo Atsumi 1-14 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd.

Claims (3)

[Claims] 1. A connecting portion which can be fitted to a mating terminal fitting is formed at a front end portion, and a pressure contact portion which cuts into an electric wire coating and conducts with a core wire is disposed behind the connecting portion, and further behind the connecting portion. A terminal fitting provided with a fixing portion for holding an electric wire covering, wherein one or more protrusions for bending and laying the electric wire are formed between the press contact portion and the fixing portion. Terminal fittings. 2. The terminal fitting according to claim 1, wherein the protrusions are arranged at different positions in the front-rear direction and in the height direction. 3. The device according to claim 2, wherein an upper one of the protrusions is bent after pushing the electric wire into the press contact portion, thereby bending the electric wire in a pushing-down direction. Terminal fittings.