JPS608588B2 - terminal fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a female terminal used in electrical wiring connectors for automobiles and the like.

Conventionally, this type of terminal is known as shown in FIG. That is, a female terminal 2 is installed in a plastic housing 1, and by inserting a male terminal 3 into the female terminal, a conductor 4 is connected to the female terminal, and a conductor 5 is connected to the male terminal. are electrically connected. The female terminal as a whole has a conductive wire 4 attached to the rear end of the terminal body 2 made of a substantially rectangular conductive metal plate.
An electrical connection part 2a is provided for connecting. In addition, both side edge portions of the central portion of the terminal body are bent along the longitudinal direction of the terminal body to form clamping portions 7, 7 that slide into contact with the male terminal 3. Furthermore, the tip 8 of the flat plate part 6 located in front of the terminal body is folded back toward the surface of the flat plate part 6 as shown in FIG. 1B, and this folded tip part 8 has a male A protrusion 10 that engages with the locking hole 9 of the terminal 3 is provided in a protruding manner. Therefore, after inserting the male terminal into the female terminal as described above, if a large pulling force is applied in the direction A for some reason, the tip 8 will rise in the direction of the mouth, separate from the surface of the flat plate 6, and the tip A strong stress may be concentrated on the folded portion 11 of the portion 8 and it may be damaged, and furthermore, there is a risk that the conductive wires 4 and 5 connected to both terminals 2 and 3, respectively, may be broken.
Furthermore, even if the pulling force is canceled midway through, plastic deformation occurs at the tip, making electrical contact more likely to occur. The object of the present invention is to provide a female terminal that overcomes the above-mentioned drawbacks.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 2 to 9.

In this embodiment, the same parts as in the conventional example are given the same reference numerals to simplify the explanation. A terminal arm 3 according to the present invention is also supported within the plastic housing base 2 via a support arm (lance) 12a of the housing.

Further, in this housing quantity 2, a slit 8 is carved in the upper wall of the terminal storage chamber 4, thereby forming an operation cut-off 8 that can be elastically deformed in the vertical direction. At the rear end of the female terminal main body, which is made of a conductive metal plate and has an almost rectangular shape as a whole, a twill part for connecting the conductor wire is formed. A pair of clamping portions are formed by bending toward the surface of the terminal body along the longitudinal direction of the terminal body.Furthermore, the two tip portions of the flat plate portion of the terminal body are bent toward the surface of the terminal body. q is formed to be smaller than the width Q of the flat plate part turtle 8, and the tip window skin is bent toward the back surface of the flat plate part deaf 9 and overlapped with each other.

The center part of the terminal body and the flat plate part have notch holes 2
``In one of these notch holes 22, a protruding piece 2a formed by bending the end of the neck at a nearly right angle protrudes.'' The other notch hole 22 is bulged upward by a method such as press molding of the tip 2 so that the upper surface is flush with the surface of the notch hole 22 (the surface of the flat plate part weight 9). A circular stepped portion 23 formed by the two parts is joined together.
Further, a protrusion 24 is formed in the center of the circular stepped portion 28 so as to protrude upward from the surface of the notch hole 22. Note that the step portion 23 disperses the bending stress concentrated directly on the protrusion 241.
In addition to protecting the protrusion 24, the amount of protrusion (cutting amount)
This is to reduce the amount by the amount of the hard part 23 and increase the strength of the protrusion itself.

In addition, the both widthwise (widthwise direction of the terminal main body) twill portions of the tip 28 are each bent downward at a substantially right angle. A pair of reinforcing ribs 266 and 28 are formed for lifting.

In this embodiment, as shown in FIG. They are formed to extend in the length direction.In addition, there are U-shaped notches at both ends of the flat plate part in the width direction near the folded part 28, as shown in the box diagram. a and fin 9a are formed respectively, t and ``the tongue-like portion G forming the upper part of the folded part 2 fin is formed in advance by C.
After the bending process is carried out at the 'section', it is formed and has a spring action, and this section is inclined at an angle of, for example, about 2 to 3 degrees with respect to the flat plate section 81. However, now, connect the male terminal 3 to the female terminal 3 in the direction of arrow C.
When the male terminal 3 is inserted into the flat plate portion 9, the protrusion 24 on the tip 2 of the back 3 of the female terminal 3 engages with the protrusion 24 drilled at the tip of the male terminal. It is elastically supported between the surface and the lacquer support.

In addition, as mentioned above, the tongue-shaped portion G of the folded portion 26 is
Since the male terminal 3 faces downward by an angle 8, the male terminal 3 can be easily inserted without the two contacting each other.

By the way, when a male terminal is inserted into a female terminal, if for some reason a large pulling force is applied between these terminals in the direction of separating the terminals (in the direction of the missing mark A), this force will cause the protrusion 4 to A pair of reinforcing ribs 25 act to buckle the tip end via the tip.
Since 82S is provided, it can sufficiently withstand this acting force. At this time, bending stress is also applied directly to the protrusion 241 of the female terminal turtle 3 that engages with the locking hole 9 of the male terminal 3, but this action is due to the elasticity of the protrusion 24 itself and the protrusion 2 turtle. It is dispersed and absorbed by the elastic action of the stepped portion 23 formed around the . If the pulling force in the direction of arrow A is too large, the protrusion 24 will be damaged first, but after that it can be used as a connector without a locking mechanism.

On the other hand, if you want to release the engagement between the female terminal and the male terminal, press the operating piece turtle 6 in the direction of arrow E in FIG. The engagement between the protrusion 24 and the locking hole 9 is released.

By the way, when the projecting piece 20a is pushed down, a force is applied to the folded part 26 in the direction of separating it, but as described above, the notches 19a are formed near the folded part 26. Since this portion is elastically deformed and the folded portion 26 is lifted slightly upward, the folded portion 26 does not open.

Further, even if the folded portion 26 is slightly lifted upward, the tongue-shaped portion G of the folded portion 26 faces downward by an angle of 8, so that it does not come into contact with the bottom surface of the male terminal 3.

Moreover, since this tongue-shaped portion G is formed by bending in advance, it returns to its original state when the force is released.As detailed above, in the terminal fitting according to the present invention, the flat plate portion Since a pair of reinforcing ribs are formed on the tip parts that are bent toward the back side and overlapped, the tip part, where stress tends to concentrate in particular, will not be greatly curved and plastically deformed or destroyed. Because a step is formed around the protrusion that engages with the engagement hole of the male terminal,
The elastic action of this step can disperse the bending stress directly concentrated on the protrusion, effectively protecting the protrusion. Also, since the step is formed in this way, the amount of protrusion (cutting) of the protrusion can be effectively protected. The number of raising troops) can also be reduced by the amount of this step,
Therefore, there is an excellent effect that the strength of the protrusion itself can be increased accordingly.

[Brief explanation of the drawing]

Fig. 1 shows a conventional example, Fig. 1A is a perspective view illustrating the configuration, and Fig. 1B is an explanatory diagram when the connection of the contact is forcibly released. The figures show one embodiment of the present invention. Figure 2 is an exploded perspective view, Figure 3 is a plan view, Figure 4 is a sectional view taken along line N-N in Figure 3, and Figure 5 is a terminal. FIG. 6 is a cross-sectional view of the terminal body, FIG. 7 is a bottom view of the terminal body, and FIGS. 8 and 9 are front and rear views of the terminal body. 3. ...Male terminal, 9 ...Latching hole, 1
9... Flat plate part, 20... Tip part, 22...
...Notch hole ~ 23...Stepped portion 24...Protrusion, 2
5... Reinforcing rib, 26... Folded portion. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure g Figure 8

Claims (1)

[Claims] 1. A wire connection portion is provided at the rear of the conductive metal plate, and both edges of the central portion of the metal plate are bent along the longitudinal direction of the metal plate toward the surface of the metal plate. In the terminal fitting, in which a pair of clamping portions are formed which slide into contact with a male terminal, and the tip of a flat plate portion located in front of the metal plate is folded back, the flat plate of the metal plate is The tip portion 20 of the portion 19 is bent toward the back surface of the flat plate portion, and these are overlapped, and a notch hole 22 is formed in the flat plate portion, and furthermore, the tip portion protrudes from the surface of the notch hole. A terminal fitting characterized in that a protrusion 24 that engages with a locking hole of a male terminal is formed, and a reinforcing rib extending in the length direction of the tip is formed at the tip. 2. The terminal fitting according to claim 1, wherein the tip portion 20 is formed with a stepped portion 23 that fits into the notch hole 22 around the protrusion 24.