JP2602860Y2 - Connector terminal fitting incorrect insertion prevention structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing erroneous insertion of terminal fittings of a connector.

[0002]

2. Description of the Related Art As shown in FIG. 6, in a conventional connector, a cylindrical terminal accommodating hole 11 is provided in a front-rear direction of a housing 10, and a terminal fitting 1 is accommodated from the rear side. Here, in order to correctly connect the contact 5 of the inserted terminal fitting 1 to the female contact portion, a stabilizer 7 that regulates the insertion direction of the terminal fitting 1 is formed so as to protrude at an intermediate portion thereof. A guide ridge 17 that guides the stabilizer 7 and prevents the terminal fitting 1 from rotating is provided on one side of the terminal receiving hole 11. On the other hand, on the other side opposite to this, in order to facilitate the operation of inserting the terminal fitting 1, the rear side serving as the terminal insertion opening 16 is formed as a widely opened insertion surface 21, while the front side is provided with the terminal fitting 1 play. In order to prevent sticking, a housing surface 22 to which the terminal fitting is closely attached is provided. The insertion surface 21 and the housing surface 22 are formed on an inclined surface 23.
It is continuous.

[0003] When the terminal fitting 1 is inserted, the terminal fitting 1 is first correctly positioned in the up-down direction, and is inserted into the terminal insertion opening 16 which is wider than the insertion surface 21 and pushed in. At this time, even if the terminal is pushed slightly out of the axis of the terminal receiving hole 11, it is guided by the inclined surface 23 and can be pushed smoothly.

[0004]

Here, since the terminal fitting 1 has the stabilizer 7 protruding to one side, the top and bottom of the terminal fitting 1 can be known. However, the terminal fitting is erroneously turned upside down. When 1 is inserted, it can be inserted at first, and is further pushed in as it is. Here, as shown in FIG. 7, the stabilizer 7 comes into contact with the inclined surface 23, but the sharp corner portion of the stabilizer 7 bites into the inclined surface 23, is guided by the inclined surface 23 while damaging the connector, and is excessively inserted. . For this reason, if the user does not notice the erroneous insertion, there are problems such as a defective product or an obstacle to the work of attaching the retainer for double locking. In addition, even if the user notices the wrong insertion and tries to start over again, there is a problem that the terminal fitting 1 cannot be easily pulled out from the bite state, and the like.

[0005]

In order to solve this problem, according to the first aspect of the present invention, a terminal fitting of a connector is prevented from being erroneously inserted.
The stop structure is located on the left and right sides and the top and bottom
A slide that projects to one side into the more cylindrical terminal receiving hole
Insert the terminal fitting with the stabilizer on both sides into the terminal receiving hole.
It can be inserted from the terminal insertion port provided on the rear side, and
The terminal accommodated in a regular accommodation position in the terminal accommodation hole
Flexible deformation that elastically engages the bracket and retains it.
A connector having a functional engagement arm.
On one side of the hole, the terminal metal is sandwiched by the stabilizer.
A terminal guide ridge for guiding the tool is formed to protrude.
The other side opposite to one side is inclined in the middle and protrudes
A receiving surface in which the terminal receiving hole is narrowed by an inclined surface is provided.
When the terminal fitting is stored in the proper storage position
Terminal insertion port side from the position where the stabilizer is arranged
To the stabilizer when the terminal fitting is inserted incorrectly.
Intrusion prevention part provided independently of the engagement arm
It is characterized by.

[0006]

According to the present invention, the following effects are achieved by adopting the above configuration. When inserting the terminal fitting in the correct direction from the rear side of the terminal receiving hole, the terminal fitting is inserted into the terminal insertion opening from the end thereof, and then pushed. Then, on one side surface of the terminal receiving hole, the stabilizer guides the terminal fitting while straddling the guide ridge. On the other hand, on the other side, the tip is guided by the inclined surface rising in the middle, smoothly inserted into the housing surface, and housed in the proper position. On the other hand, when erroneous insertion is performed upside down, pushing in the terminal fitting inserted from the terminal receiving hole causes the stabilizer to hit the intrusion prevention part, preventing further insertion without damaging the connector. You.

At this time, since the stabilizer comes into contact with the intrusion preventing portion on the side of the terminal insertion port from the regular accommodation position, the rear end of the terminal fitting protrudes from the housing, and is clearly inserted incorrectly. To make the worker aware. Therefore, it is possible to prevent the terminal insertion operation from being terminated with the erroneous insertion. Also, when re-inserting the terminal, the terminal fitting can be easily pulled out.

[0008]

As described above, according to the present invention, when the terminal fitting is erroneously inserted into the terminal insertion opening side from the position where the stabilizer is arranged when the terminal fitting is accommodated in the regular accommodation position. Since the stabilizer is provided with an intrusion prevention part that abuts, even if the terminal is
The stabilizer cannot contact the intrusion preventing portion and the terminal fitting cannot be inserted all the way. The operator can easily recognize that the terminal fitting is incorrectly inserted, and can prevent the operation in which the incorrect insertion is continued from being completed. Further, at this time, there is an excellent effect that the connector is not damaged due to erroneous insertion, and the insertion operation can be easily re-executed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. First, a terminal fitting 1 housed in a connector of this embodiment will be described with reference to FIG. 1. The terminal fitting 1 is formed by bending a single thin metal piece and is formed on a rear side (see FIG. 1). In FIG. 1, the insulation barrel 2 (on the left side) crimps the covering portion of the electric wire W, and further crimps a metal wire with a wire barrel 3 (see FIG. 4) to securely connect. On the front side, a conductor 4 bent into a rectangular shape with a slightly longer cross section is formed, and a flat bar-shaped contact 5 to be inserted into the female terminal fitting is formed on the front side. An engagement hole 6 is formed in the middle of the conductor part 4 by cutting out the upper surface, and a rectangular stabilizer 7 that stands upward on both sides of the engagement hole 6 is provided upright. As shown in FIGS. 1 and 2, a connector housing 10 of this embodiment is formed in a substantially rectangular parallelepiped, and a terminal receiving hole 1 for inserting a terminal fitting 1 is provided at a rear portion thereof.
1 are defined by a partition wall 12 and are formed in three rows in a laterally parallel manner, and a housing receiving hole 13 for receiving and connecting a female housing (not shown) is formed in a front portion. The two holes 11 and 13 are defined by a partition wall 14.

The terminal accommodating hole 11 is a cylindrical long hole capable of accommodating the terminal fitting 1 in the front-rear direction. An insertion hole 15 is formed in a partition wall 14 at a front portion thereof. The provided contact 5 can be protruded into the housing storage hole 13. On the other hand, a terminal insertion opening 16 for inserting the terminal fitting 1 is opened at the rear end of the terminal receiving hole 11.

The upper surface of the terminal receiving hole 11 is formed flat, and a guide ridge 17 is formed on the upper surface so as to protrude in the axial direction. The width of the guide ridge 17 is formed slightly smaller than the width of the conductor 4 of the terminal fitting 1, and both stabilizers 7 are slidable across the side of the guide ridge 17. An engagement arm 18 extends from the tip of the guide ridge 17. The upper surface of the portion of the engagement arm 18 is formed as a concave portion 19, and is formed so that the engagement arm 18 can be bent. In addition, an engagement protrusion 18 a that engages with an engagement hole 6 of the terminal fitting 1, which will be described later, is formed integrally with the lower side of the engagement arm 18 so as to protrude into the terminal housing hole 11.

On the other hand, on the lower surface of the terminal accommodating hole 11, an insertion surface 21 capable of accommodating the insulation barrel 2 at the terminal insertion opening 16 side, and an accommodating surface whose front portion accommodates the conductor portion 4 in close contact. 22. An inclined surface 23 for smoothly inserting the terminal fitting 1 is provided between the insertion surface 21 and the housing surface 22. The inclined surface 23 is formed at a position where the stabilizer 7 of the terminal fitting 1 abuts forward of the regular accommodation position. Further, in this embodiment, the receiving surface 22 is formed in two steps,
And an intermediate surface 22a. And the intermediate surface 2
Notch surfaces (intrusion preventing portions) 24 which are cut vertically downward from the boundary between the 2a and the inclined surface 23 are formed on both sides of the inclined surface 23. The width of the inclined surface 23 is formed narrower than the two stabilizers 7, 7 by the notch surface 24, and when the terminal fitting 1 is erroneously inserted, the stabilizer 7 advances into the notch surface 24 without coming into contact with the inclined surface 23. It is formed so that.

Next, the operation of this embodiment will be described. First, when the terminal fitting 1 is correctly inserted, as shown in FIG.
The stabilizer 7 is inserted upward into the housing 10 as shown in FIG. The terminal fitting 1 has an inclined surface 2 on one side.
3, the upper surface of the conductor portion 4 enters while contacting the guide ridge 17. At this time, the terminal fitting 1 is further pushed in by being guided by the stabilizer 7 sandwiching both side surfaces of the guide ridge 17, and reaches the accommodation surface 22. Then, the upper surface of the conductor portion 4 advances by bending the engagement arm 18 upward, the engagement protrusion 18 a engages with the engagement hole 6, and the terminal fitting 1 is fixed in the terminal receiving hole 11. .

On the other hand, if the terminal fitting 1 is erroneously turned upside down and the terminal fitting 1 is inserted, the terminal insertion opening 16 is initially formed large as shown in FIG. However, when the stabilizer 7 reaches the site of the inclined surface 23, the stabilizer 7 comes into contact with the intrusion prevention portion 24, and the intrusion is prevented. At this time, the cutout surface 24 is cut vertically downward, and comes into planar contact with the front surface of the stabilizer 7, thereby preventing insertion without cutting into the cutout surface 24. The operator cannot push the terminal fitting 1 any further, but this stop position is considerably before the normal case, and the installation barrel 2 of the terminal fitting 1 is still outside the terminal insertion port 16. , You will notice an erroneous insertion.

The worker who notices the erroneous insertion can perform the terminal insertion by pulling out the terminal fitting 1, re-inserting it in the correct insertion direction and re-inserting it. At this time, since the stabilizer 7 does not bite into the housing 10 and does not engage at all, the insertion can be easily performed again.

In this embodiment, an example has been described in which the side surface of the inclined surface is formed as an intrusion preventing portion by a cutout surface 24 which is notched vertically, but the present invention is not limited to this, and the protrusion protrudes into the terminal receiving hole. The projection may be formed to project from the lower surface or the side surface.

In this embodiment, the male terminal fitting 1 is provided.
Although the connector for inserting a female terminal has been described, the present invention is also applicable to a connector for inserting a female terminal fitting.

[Brief description of the drawings]

FIG. 1 is a perspective view of a housing.

FIG. 2 is a sectional view of a housing.

FIG. 3 is an enlarged cross-sectional view of a part cut along the line AA in FIG. 2;

FIG. 4 is a sectional view showing a normal insertion state.

FIG. 5 is a partially enlarged cross-sectional view showing an erroneous insertion state.

FIG. 6 is a cross-sectional view showing a normal insertion state of a conventional example.

FIG. 7 is a cross-sectional view showing an erroneous insertion state of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Terminal fitting 7 ... Stabilizer 10 ... Housing 11 ... Terminal accommodating hole 16 ... Terminal insertion opening 17 ... Guide ridge 22 ... Accommodating surface 23 ... Inclined surface 24 ... Intrusion prevention part (cutout surface)

Claims (1)

(57) [Scope of request for utility model registration] 1. A terminal fitting having a stabilizer protruding to one side on both sides in a terminal receiving hole formed into a tubular shape by left and right surfaces and upper and lower surfaces in a front-rear direction of a housing, at a rear side of the terminal receiving hole. insertable and Then co from the terminal insertion opening provided
Before being accommodated in a regular accommodation position in the terminal accommodation hole.
Deflection that elastically engages and retains the terminal fitting
In a connector having a deformable engagement arm, a terminal guide ridge for guiding a terminal fitting sandwiched by a stabilizer is formed on one side surface of the terminal receiving hole to protrude therefrom. The side surface is provided with a receiving surface in which the terminal receiving hole is narrowed by an inclined surface that is inclined and protruded in the middle, and when the terminal fitting is received in a regular receiving position, the position where the stabilizer is disposed is located. A terminal fitting erroneous insertion of a connector, characterized in that an intrusion preventing portion against which a stabilizer abuts when a terminal fitting is erroneously inserted is provided independently of the engagement arm. Prevention structure.