JPH0615433Y2 - Terminal for electric wire connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> Since the terminal for the electric wire connector according to the present invention has a female contactor to be connected to one electric wire or an electric appliance, the other electric wire or It is a so-called faston type terminal suitable for making an electrical connection between both electric wires or between electric appliances by fitting and locking to a male contactor connected to an electric appliance, for example, a contact called a tab. , Its uses are extremely widespread.

<Prior Art> A conventional Faston-type terminal has a flat plate slightly thicker than the gap between a pair of spring portions formed by bending both side edges of the bottom plate into a cylindrical shape and the bottom plate. The tab is inserted against the elastic force of the spring portion, and the dimple-shaped small projection of the bottom plate is fitted into the small hole formed in the tab, so that the tab is hardly pulled out to the faston type terminal. It was configured to be locked.

<Problems to be solved by the invention> However, in this type of conventional terminal, when the tab is inserted into the gap narrower than the thickness of the main body portion, it is necessary to overcome the elasticity of the spring portion. Of course, since the portion from the tip of the tab to the small hole must also pass over the small projection formed directly on the bottom plate, the tab is not contacted with the small projection after the tab is in contact with the small projection. Since a particularly strong force is required to insert the wire, there is a problem that the wire connection work cannot always be performed quickly and smoothly.

Moreover, this problem tends to be more pronounced as the size of the terminal is larger, and the Faston type terminal has to be limited to a relatively small size. In order to solve this problem, the height of the small protrusions may be lowered, or the elasticity of the cylindrical spring portion may be reduced, but in that case, the tab can be easily inserted. However, it is not an effective solution because it causes another problem that the tabs that are once connected will come off with a comparatively weak force.

In view of the above circumstances, an object of the present invention is to fasten a tab into a female contactor, yet fasten it so that the tab is almost unremovably and firmly retained in the contactor once inserted and connected. Providing a mold terminal.

<Means for Solving the Problem> In order to achieve this object, a terminal for an electric wire connector according to the present invention is substantially composed of a female contactor continuously connected to an electric wire crimping portion made of a conductive elastic material. A pair of substantially cylindrical spring parts formed by bending both side edges of a flat bottom plate upward and then bending inwardly, and the upper surface of the flat bottom plate faces a lower end of the spring part at a predetermined interval. In the terminal having a constitution in which the bottom plate is provided with a dimple-shaped small protrusion projecting toward the spring portion, the base plate connected to the bottom plate at a side separated from the wire crimping portion has the small protrusion. At the same time, the tongue piece, which is surrounded by the cut groove and is swingable, is formed on the bottom plate in an inclined posture that gradually approaches the lower end side of the spring portion as it goes to the inner end thereof.

The tongue piece may be a substantially rectangular shape in which the central portion of the bottom plate is cut and raised in a U shape, or may be a semi-elliptical shape in which a cut and raised shape is formed in a ⊂ shape. The point is that it is cut and raised so that it gradually becomes higher from the bottom plate as it goes inwardly of the female terminal, and a small protrusion is formed in an appropriate portion, for example, in the vicinity of the center in the direction from the outer surface of the bottom plate to the inner surface. It is essential. It suffices if the elastic and conductive plate material of the bottom plate is punched out so as to form a dimple-shaped small recess when viewed from the bottom plate bottom side. In short, when viewed from the bottom plate upper surface, it is a small protrusion, and its size is the tab. It must be able to fit at least partially into the small hole to be drilled.

<Function> As described above, for example, the female contactor constituting the faston type terminal of the present invention which is fixed to one of the electric wires at the crimping portion is provided with the flexible tongue piece integrated with the bottom plate. Therefore, if the tab fixed to the other side, for example, the electric wire is inserted between the upper spring portion of the contactor and the tongue piece, the tongue piece is pushed down toward the bottom plate body. Therefore, the tab easily reaches the innermost portion of the female contact without applying an excessive force, and the small projection of the tongue is elastically fitted into the small hole of the tab. .

Immediately before this fitting, the insertion resistance of the tongue to the tab is maximized, which is relatively small as compared with the frictional resistance between the spring portion and the tab. Thus, once the tab is connected with the female contactor of the terminal of the present invention, even if an external force is applied to the tab in the pulling direction, the tab is pressed by the small hole and the small hole by its own elasticity. The tabs are reliably prevented from being pulled out by the engagement between the tongue pieces and the small projections. Depending on the shape of the small protrusion, the external force in the direction of pulling out the tab exerts a component force in the direction of pushing up the tongue piece rather than through the small protrusion, so the pullout resistance of the tab is a small protrusion. Nevertheless, it is extremely powerful.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. A female contact connected to a cylindrical wire crimping portion (11) made of a conductive elastic material having sufficient strength. The child (2) has a pair of substantially cylindrical spring parts (1) formed by bending both side edges of the substantially flat bottom plate (8) upward and then bending them inward.
It is equipped with 0) and (10). The surface of the wire crimping portion (11) is covered with an insulating synthetic resin sleeve (12), and the bottom plate (6) facing the lower ends of the spring portions (10), (10) at a predetermined interval ( The structure in which the dimple-shaped small protrusion (6) protruding toward the spring portion is provided on the upper surface of (8) is the same as the conventional faston type terminal, but the terminal of the present invention is The tongue piece (9) connected to the bottom plate (8) at the base portion (9a) on the tip side separated from (11) is gradually the spring portion (10), () toward the inner end, that is, the wire crimping portion side. The bottom plate (8) is inclined so as to approach the lower end of
(C) is surrounded by three sides, and is formed by cutting and raising so as to be swingable about the fulcrum of the base (9a).

And, as is clear from FIGS. 2, 4 and 5, the small projections (6) located in the approximate center of the rectangular tongue (9) in this example are located outside, that is, in the figure. The shape on the left side is low, and the shape is steeply rising toward the inside, that is, on the right side in the figure.

The wire connector terminal (4) configured as above is
As shown in FIG. 5, the electric wire (1) is crimped (A) to the electric wire (11), and the other electric wire (1 ') is attached to one end of the tab (3).
Is the female contactor (2) from the other end (3a) as shown by the arrow (Y) in Fig. 1.
Is to be inserted into.

In this example, the flat tab (3) is provided with a circular small hole (5), and the distance (T1) between the tip and the chamfered portion (3a).
Is slightly larger than the distance (T2) between the inner end of the tongue (9) and the small protrusion (6). The thickness of the tab (3) is almost the same as or slightly larger than the distance between the lower end edge (7) of the spring portion (10) and the upper surface (8a) of the bottom plate (8). Furthermore, the lower edge of the spring part (7)
The outer end inlet of the is rounded and rounded (7a).

During use, the rounded portion (7a) allows the tab (3) to be easily inserted from the chamfered portion (3a) of the tab (3), and the tab (3) elastically deforms the lower piece (9) downward and pushes it down to make female contact. Enter inside the child (2). Shortly before reaching the innermost part of the contact, the small hole (5) of the tab approaches the small protrusion (6) of the tongue (9), and at the same time when it reaches the innermost part, the small protrusion and the elastic force are emitted. Fit together.

As shown in FIG. 5, in the state after the tab is inserted and fixed, the tab (3) is pressed against the spring portions (10), (10) by the upward elastic restoring force of the tongue piece, so that there is no rattling. Moreover, since the inner peripheral edge portion (5a) of the small hole (5) of the tab is in contact with the highest key-shaped portion (6a) at the inner end of the small protrusion (6), a strong pulling force should be obtained. Even if it is applied to the tab (3), its external force causes a component force in the direction of lifting the tongue (9) upward, and the engagement between the small hole and the small protrusion works more strongly, and The tongue piece from the relationship with the distances (T1) and (T2)
(9) The upward component force effectively acts on the inner end front side portion of the tab, and the tab clamping force by the tongue piece and the spring portion is further strengthened, so that the tab almost cannot be pulled out.

Various modifications are made to the above embodiment, for example, the shapes and positions of the small projections and small holes are different from those shown in the drawing, or two or more small projections and small holes are provided as necessary. Is also possible.

Further, the shape of the tongue piece (9) is not limited to the U-shape, but may be a U-shape or any other shape.

<Effect of the Invention> As described above, according to the terminal for the electric wire connector of the present invention, the tab can be inserted and locked with a light force by utilizing the elasticity of the tongue.
Moreover, the pull-out is surely prevented by the engagement of the small projection provided on the tongue piece and the small hole on the tab side, which is biased upward after being inserted once, and the object mentioned at the beginning is sufficiently achieved. . Moreover, this ease of insertion has the advantage of enabling the size of this type of faston type terminal to be increased. Since the dimple-shaped projections and small holes are also provided with the conventional terminals, they can be simply formed by cutting and raising the tongue pieces, and the increase in manufacturing cost is only slight.

[Brief description of drawings]

FIG. 1 is a perspective view of a terminal according to an embodiment of the present invention seen obliquely from below, FIG. 2 is a bottom view, FIG. 3 is a side view taken along the line III-III in FIG. 1, and FIG. 2 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view corresponding to FIG. 4 showing a usage state. In the figure, (2) is a female contact, (3) is a tab, (5) is a small hole, (6) is a small protrusion, (8) is a bottom plate, (9) is a tongue piece, (9a) is a tongue piece. At the base of (10)
Is a spring part, and (11) is a wire crimping part.

Claims (1)

[Scope of utility model registration request] 1. An electric wire crimping portion (11) made of a conductive elastic material.
A pair of substantially cylindrical spring parts formed by bending the both side edges of the substantially flat bottom plate (8) upward and then bending them inwardly. (10), (10), the bottom plate (8) is a small protrusion protruding toward the spring portion
A tongue (9) having (6) is provided, and the tongue is an electric wire crimping portion.
In the terminal which is connected to the bottom plate (8) at the base portion (9a) on the tip side separated from (11) and is swingably formed by being separated by the notch groove (C), the tongue piece (9) is A terminal for an electric wire connector, which is formed on the bottom plate (8) in an inclined posture in which it gradually approaches the lower end side of the spring parts (10), (10) as it goes toward the inner end thereof.