JP3164193B2 - Double locking connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double locking connector, and more particularly to a double locking connector having a cap type retainer.

[0002]

2. Description of the Related Art Conventionally, as this type of double locking connector, the one shown in FIGS. 8 to 10 is known. A cap-shaped retainer 2 can be mounted from the front end of the cavity 1 that accommodates the terminal fitting, and an arm-shaped resin lance 3 is formed in the cavity 1 along the axial direction. The terminal housing chamber 1a is formed in the upper part with reference to 3, and the half insertion detecting chamber 1b is formed in the lower part. Further, a portion of the cavity 1 closer to the opening than the resin lance 3 is a communication gap 1c where the two terminal accommodating chambers 1a and the half-insertion detection chamber 1b communicate.

[0003] The retainer 2 is formed in the shape of a cap that wraps the cavity 1 as a whole, and a half-insertion detection piece 2a protrudes from an inner surface toward a half-insertion detection chamber 1b in the cavity 1. When the retainer 2 is mounted, the tip of the half-insertion detection piece 2a enters the gap below the resin lance 3, and the upper surface of the half-insertion detection piece 2a enters the rectangular box-shaped step so as to close the communication gap 1c. A portion 2b is formed. On the other hand, an opening 4 is formed at the front end of the cavity 1, an upper part of the opening 4 is a metal fitting insertion part 4a into which a terminal metal fitting is inserted, and a lower part is a half insertion detecting piece 2a. It is a detection piece insertion part 4b,
The middle part is a partition wall 4c, 4c protruding inward from the side wall.
To make the gap narrow.

When the retainer 2 is mounted, the tip of the half-insertion detecting piece 2a is attached to the opening 4 of the cavity 1 as shown in FIG.
The step 2b is inserted through the space between the partition walls 4c, 4c. Then, the tip of the half-insertion detecting piece 2a enters below the resin lance 3, and the step portion 2b enters the communication gap 1c.

[0005]

In the above-described conventional double locking connector, the step 2b has a rectangular box shape. For example, the opening 4 of the cavity 1 is distorted as shown in FIG. Then, the front end corners come into contact with each other, and there is a problem that the retainer 2 cannot be inserted. Also, when the retainer 2 is inserted obliquely, the corners similarly hit the partition walls 4c, 4c, and cannot be inserted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a double locking connector capable of preventing insertion failure of a retainer.

[0007]

In order to achieve the object, an invention according to claim 1 is a double locking connector in which a cap-type retainer is mounted at a front end of a cavity for accommodating a terminal fitting. A resin lance is provided inside which is extended in the shape of an arm in the axial direction of the cavity, and divides the cavity into a terminal receiving chamber on the upper surface, a semi-insertion detection chamber on the lower surface, and a communication gap in front, and the communication gap is
A pair of partition walls projecting inward from the side wall surface of the cavity is formed to be narrower than the terminal receiving chamber and the half-insertion detection chamber, and the cap-type retainer has a tip when mounted from the front of the cavity. A half-insertion detection piece inserted into the half-insertion detection chamber, a step formed on the upper surface in the middle of the half-insertion detection piece, and inserted into the communication gap, a front end and a side surface of the step in the insertion direction. And a tapered surface formed at a corner of the step, and the step is characterized in that it has the same width as the regular width of the communication gap.

[0008]

[0009]

According to the first aspect of the present invention, when the retainer is mounted on the front end of the cavity, the half-insertion detecting piece of the retainer is half of the cavity.
While being inserted into the insertion detection chamber, a step formed on the upper surface in the middle of the half-insertion detection piece is inserted into the communication gap between the pair of partition walls. At this time, the cavity is distorted and the communication gap
When the width of the step is narrow, the tapered surface
Sliding contact with the partition wall, pushing the communication gap up to the regular width,
As a result, the distortion of the cavity is corrected.

[0010]

[0011]

As described above, according to the present invention, since the tapered surface is formed in the step portion, the cavity portion can be inserted all the way without being distorted even if the retainer is inserted obliquely. A possible double locking connector can be provided.

[0012]

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a waterproof connector to which a double locking connector according to one embodiment of the present invention is applied.
FIG. 2 is a front view. The female connector 10 shown in FIG. 1 has a substantially cylindrical main body 20 having cavities 21 and 21 formed on the left and right, and a cylindrical hood formed integrally with the main body 20 and surrounding the main body 20. A retainer 40 formed in the shape of a cap for covering the front side of the main body 20 and having communication windows 41, 41 formed in the opening surfaces of the cavities 21 and 21; And a rubber seal 50 to be mounted as a unit.

The cavity 21 of the main body 20 is
0 is formed in the shape of a rectangular tube, and a resin lance 22 is formed inside as shown in FIG. Resin lance 2
2 is formed in the shape of an arm which is oriented in the axial direction of the cavity 21 and is continuous with the main body 20 at the rear end side. An insertion detection chamber 21b is formed, and a portion on the opening side of the resin lance 22 is divided into a communication gap 21c in which the two terminal accommodating chambers 21a and the half insertion detection chamber 21b communicate. Also in the opening 23 of the cavity 21, the front part of the terminal accommodating chamber 21a is a metal fitting insertion part 23a, and the half insertion detecting chamber 21a is also provided.
The front part of b is a detection piece insertion part 23b, and a partition wall 2 protruding inward from the side wall is provided in the middle part between them.
3c and 23c are formed to narrow the gap.

On the other hand, the retainer 40 is formed in a cap shape enclosing the main body 20 as a whole.
Half insertion detection chamber 2 in each cavity 21, 21 from the inner side
The semi-insertion detecting pieces 42, 42 protrude toward 1b, 21b, and stepped portions 43, 43 are formed on the upper surfaces of the semi-insertion detecting pieces 42, 42 to enter the communication gaps 21c, 21c. ing. As shown in the cross-sectional view of FIG.
That is, the tapered surface 43 is formed at the front end corner on the front side in the insertion direction.
a, 43a are formed. In addition, lock projections 44, 44 for engaging with the outer surface of the main body 20 are formed on the inner peripheral side of the side wall surface of the retainer 40.

In this embodiment, the female connector 10
In addition, the hood portion 30 and the rubber seal 50 are also provided,
These are not necessarily required, and the interior of the cavity 21 is formed by the resin lance 22 and the terminal accommodating chamber 21 a and the half-insertion detecting chamber 21.
b and the communication gap 21c, and a half insertion detection piece 42 inserted into the half insertion detection chamber 21b on the side of the retainer 40, and the communication gap 21c above the half insertion detection piece 42 and What is necessary is just to form the step part 43 in the corresponding part. In addition, although linear tapered surfaces 43a, 43a are formed at the front end corners of the step portion 43, the tapered surfaces need not necessarily be linear, and when the retainer 40 is inserted obliquely or when the main body 20 is distorted. Any shape may be used as long as it is a tapered shape that can be guided when the user is in the vehicle. For example, the shape may be a curved surface.

Next, the operation of the present embodiment having the above configuration will be described. The rubber seal 50 is mounted on the main body 20 in advance, and after the terminal fitting 60 is accommodated, the retainer 40 is mounted on the front end of the main body 20. Then, as shown in FIG.
The semi-insertion detection pieces 42, 42 pass through the detection piece insertion portions 23b, 23b at the lower portions of the openings of the cavities 21, 21, and the resin lances 22, 22, respectively, in the cavities 21, 21.
Is inserted into the half-insertion detection chambers 21b, 21b below the bottom. The step 43 on the half-insertion detecting piece 42 passes through the space between the partition walls 23c, 23c at the opening of the cavity 21, and enters the communication gap 21c in front of the resin lance 22. This state is shown in FIG.

However, the main body 20 is distorted as shown in FIG.
In the case where c is protruding inward, when the half-insertion detection piece 42 is pushed into the detection piece insertion portion 23b, the tapered surface 43a at the end corner of the step 43 contacts the protrusion of the partition wall 23c. Because they are in contact with each other, they can be pushed all the way in while pushing them to the side. Also, the retainer 40
Is inserted obliquely, the tapered surface 43a
7 comes into contact with the partition wall 23c and the leading end of the step portion 43 enters between the partition walls 23c, 23c. Therefore, as shown in FIG.

As described above, the inside of the cavity 21 is divided by the resin lance 22 into the terminal accommodating chamber 21a, the half-insertion detection chamber 21b, and the communication gap 21c, and is inserted into the half-insertion detection chamber 21b on the side of the retainer 40. Half insertion detection piece 4
2, a step 43 is formed above the half-insertion detecting piece 42 at a position corresponding to the communication gap 21c, and a tapered surface 43a is formed at a front end corner of the step 43. Even when the part 20 is distorted or obliquely inserted, it can be easily inserted all the way back, and insertion obstruction can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a waterproof connector to which a double locking connector according to an embodiment of the present invention is applied.

FIG. 2 is a front view of the waterproof connector.

FIG. 3 is a sectional view of the waterproof connector.

FIG. 4 is a sectional view of a retainer in the waterproof connector.

FIG. 5 is a sectional view of the waterproof connector in an assembled state.

FIG. 6 is an enlarged front view of the main body in a distorted state.

FIG. 7 is an enlarged front view of the main body in a corrected state.

FIG. 8 is a partial sectional view of a conventional double locking connector.

FIG. 9 is a perspective view showing a process of assembling the double locking connector.

FIG. 10 is an enlarged front view of the double locking connector in a distorted state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Cavity 21a ... Terminal accommodation room 21b ... Half insertion detection chamber 21c ... Communication gap 22 ... Resin lance 23 ... Opening 23c ... Partition wall 40 ... Retainer 42 ... Half insertion detection piece 43 ... Step part 43a ... Tapered surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akito Maekawa 1-114 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Kiyofumi Ichida 1-114, Nishisuehirocho, Yokkaichi-shi, Mie (56) References JP-A-2-165580 (JP, A) JP-A-6-60072 (JP, U)

Claims (1)

(57) [Claims] 1. A double locking connector in which a cap-type retainer is mounted at a front end of a cavity for accommodating a terminal fitting, wherein the cavity is internally extended in the form of an arm in the cavity axis direction. A resin lance is provided to divide the inside of the cavity into a terminal receiving chamber on the upper surface, a semi-insertion detecting chamber on the lower surface, and a front communication gap, and the communication gap is formed by a pair of partitions projecting inward from a side wall surface of the cavity portion. The wall is formed narrower than the terminal accommodating chamber and the half-insertion detection chamber, and the cap-shaped retainer has a distal end inserted into the half-insertion detection chamber when mounted from the front of the cavity portion. the insertion detecting piece, formed on the middle upper surface of the insufficient insertion detecting piece, it is formed at the corner portion of the stepped portion to be inserted deep into the linking gap, and the insertion direction side front and side surfaces of the stepped portion And a tapered surface, the step portion, double locking connector, characterized in that forming the same width as the normal width of the linking gap.