JP2539552Y2 - Waterproof 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 waterproof connector which can prevent water from entering the inside of a connector for connecting terminals.

[0002]

2. Description of the Related Art Conventionally, as this kind of waterproof connector, there is a connector similar to that disclosed in Japanese Utility Model Laid-Open No. 63-61776 as shown in FIG. In this figure, a connector 1 is a terminal 1 pierced from the rear end face toward the front.
0 is provided in the terminal insertion hole 2. On the other hand, terminal 1
0 indicates that the wire 11 is connected to the rear end and the terminal 10
An annular elastic body 12 such as rubber having a diameter slightly larger than that of the terminal insertion hole 2 is crimped around the rear electric wire 11.

In such a configuration, the terminal 10 is connected to the connector 1
When inserted into the terminal insertion hole 2, the annular elastic body 12 is compressed in the radial direction, and the annular elastic body 12 is brought into close contact with the wall surface of the terminal insertion hole 2 so that water can be prevented from entering the inside of the terminal insertion hole 2. I have.

[0004]

[Problem to be solved by the invention] However, the electric wire 1
The operation of crimping the ring-shaped elastic body 12 to the terminal 1 is a time-consuming operation. In order to insert the terminal 10 having such a ring-shaped elastic body 12 into the terminal insertion hole 2, the ring-shaped elastic body 12 is required.
Has to be press-fitted into the terminal insertion hole 2, so that the operation of connecting the terminal 10 to the connector 1 is significantly slowed down.

The present invention has been made in view of the above points, and an object of the present invention is to provide a waterproof connector which can prevent water from entering into the inside of a connector, can easily connect the connector to a terminal, and can improve workability. .

[0006]

In order to solve the above-mentioned problems, according to the present invention, there is provided a tubular member extending from the terminal receiving chamber behind the terminal receiving chamber and through which a terminal fitting and an electric wire connected to the terminal fitting are inserted. A waterproof connector comprising: a connector housing having a terminal insertion portion; and a terminal insertion portion holder having a terminal insertion hole opposed to the terminal insertion portion at a base contacting a rear end of the terminal insertion portion. An axial direction of the terminal insertion portion is provided on the provisional locking projection and the full locking projection provided on one of the terminal insertion portion holders and the provisional locking projection and the full locking projection provided on the other. The terminal insertion portion holder is integrally provided in the terminal insertion portion, and the locked portion sequentially engaged by relatively moving the terminal insertion portion holder toward the connector housing along the terminal insertion portion. Along the axial direction of the parts is characterized in that a reduced diameter with thin annular recess contact in contact with the outer periphery of the electric wire by the present locking by relatively moving toward the connector housing.

[0007]

The terminal insertion portion holder is locked at the temporarily locked position with respect to the connector housing when the temporarily locked projection and the locked portion are engaged. In this state, since the diameter of the annular concave portion is not reduced, the terminal fitting and the electric wire can be easily inserted. Next, when the terminal insertion portion holder at the temporary locking position is moved toward the connector housing along the axial direction of the terminal insertion portion, the terminal insertion portion holder comes into contact with the terminal insertion portion, and is further moved to fully engage the terminal insertion portion holder. When locked at the stop position, the annular recess is reduced in diameter and closely contacts the outer periphery of the electric wire. Thus, it is possible to prevent water from entering the terminal receiving chamber of the connector housing.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the waterproof connector according to the present invention. In the figure, a waterproof connector 20 includes a box-shaped connector housing 30 for accommodating terminals, and a cap-shaped terminal insertion portion holder 40 used for preventing water from leaking into the connector housing 30.

As shown in FIG. 3, the connector housing 30 has a terminal accommodating chamber 31 in which a terminal 50 can be accommodated.
And a cylindrical terminal insertion portion 32 projecting rearward from the rear wall of the terminal storage chamber 31 and communicating with the terminal storage chamber 31 is integrally formed. At an intermediate portion of the terminal insertion portion 32, an annular concave portion 32a having a wall thickness smaller than the surrounding wall thickness is provided, and the intermediate portion is constricted. For this reason, when the terminal insertion portion 32 is compressed in the terminal insertion direction, the diameter of the annular concave portion 32a is reduced, and when the compressed state is released, the diameter of the annular concave portion 32a is increased, and the terminal insertion portion 32 is restored. I have.

Further, as shown in FIG. 1, a temporary locking projection 34 is provided on the outer surface of the connector housing 30 near the terminal insertion portion 32. Projection 35 is provided.

The terminal insertion portion holder 40 includes a terminal insertion portion 32.
And a pair of cap-like bases 41 protruding forward from opposing side walls and temporarily engaging with the temporary locking projections 34 and the final locking projections 35 on both side walls of the connector housing 30. Locking arm 4 as flexible locked portion
And 2.

The rear wall of the base 41 has a diameter equal to the diameter of the rear end of the terminal insertion portion 32 at a position facing the terminal insertion hole 32b of the terminal insertion portion 32 when the base 41 is mounted on the terminal insertion portion 32. A terminal insertion hole 41a is provided.

In order to connect the terminal 50 to the waterproof connector 20 having such a configuration, as shown in FIGS. 2 and 3, the terminal insertion portion holder 40 is first placed over the terminal insertion portion 32 of the connector housing 30, and The provisional locking projection 34 of the housing 30 and the locking arm 42 of the terminal insertion part holder 40 are engaged to connect the terminal insertion part holder 40 to the connector housing 3.
Temporarily lock to 0. At this time, the terminal insertion hole 32b of the terminal insertion part 32 of the connector housing 30 and the terminal insertion hole 41a of the terminal insertion part holder 40 face each other, and the terminal insertion part 32 is not compressed in the terminal insertion direction. The annular concave portion 32 of the portion 32 is not reduced in diameter.

Next, the terminal 50 is inserted into the terminal insertion portion 32. In this state, the diameter of the annular concave portion 32a of the terminal insertion portion 32 is not reduced, so that the terminal 50 can be easily inserted into the terminal insertion portion 32.

Further, from this state, the terminal insertion portion holder 4
When 0 is pressed toward the connector housing 30, the terminal insertion portion 32 of the connector housing 30 is compressed in the terminal insertion direction, and the diameter of the annular concave portion 32a of the terminal insertion portion 32 is gradually reduced. Then, as shown in FIGS.
When a completely adheres to the electric wire 51 to which the terminal 50 is connected,
The locking arm 42 of the terminal insertion part holder 40 can be engaged with the final locking projection 35 of the connector housing 30 and can be permanently locked. When the locking arm 42 is thus engaged with the final locking projection 35, the connection between the waterproof connector 20 and the terminal 50 is completed.

When the terminal 50 is connected to the waterproof connector 20, the annular recess 32 a of the terminal insertion portion 32 is in close contact with the electric wire 51 to which the terminal 50 is connected. Water can be prevented.

When the terminal 50 is connected to the waterproof connector 20, the terminal 50 can be inserted into the terminal insertion portion 32 in a state where the diameter of the terminal insertion portion 32 is not reduced. When the waterproof connector 20 is connected to the terminal 50, the terminal 40 is pressed toward the connector housing 30 and the locking arm 43 of the terminal insertion portion holder 40 is merely engaged with the final locking projection 35 of the connector housing 30. Properties can be significantly improved.

Further, according to the present embodiment, the annular recess 32
Since a is integrally formed with the terminal insertion portion 32, there is no need to facilitate a separate elastic waterproof material. As a result, the number of parts in the waterproof structure is reduced, and the number of steps for assembling a separate elastic waterproof material is also reduced, so that manufacturing costs can be reduced. Further, according to the present embodiment, the diameter of the annular concave portion 32a can be reduced by moving the terminal insertion portion holder 40 in the axial direction of the terminal insertion portion 32.
Since a can be brought into close contact with the electric wire, the waterproofing work is facilitated. That is, when the annular concave portion 32a is compressed in the radial direction, the compression member is inserted into the outer periphery of the annular concave portion in order to press the outer peripheral side of the annular concave portion toward the center as compared with the operation of inserting the compression concave member as in the present embodiment. The operation of moving the section holder 40 in the axial direction toward the connector housing is simpler and has better workability.

In this embodiment, the terminal insertion portion holder 4
Although the base 41 of the “0” is cap-shaped and attached to the terminal insertion portion 32, the present invention is not limited to this, and the base 41 may be simply formed in a plate shape and abut on the rear end of the terminal insertion portion 32. In this case, the locking arm 42 is connected to the temporary locking projection 34.
When the terminal insertion portion 32 is engaged with the terminal insertion portion 32, the terminal insertion portion holder 40 is fixed to the connector housing 30 by compressing the terminal insertion portion 32 to such an extent that the terminal insertion into the terminal insertion portion 32 is not hindered. Terminal insertion hole 32b and base 41
Terminal insertion holes 41a may be opposed to each other. Even in this case, the same operation and effect as in the above-described embodiment can be obtained.

[0021]

As described above, according to the present invention, when the terminal insertion portion holder is temporarily locked to the connector housing, the annular concave portion of the terminal insertion portion is not reduced in diameter, so that the terminal can be easily inserted into the terminal insertion portion. If the terminal insertion portion holder is pressed toward the connector housing from the state in which the terminal is inserted, and the terminal engagement state is established, the annular concave portion is reduced in diameter and can be in close contact with the electric wire to which the terminal is connected. For this reason, it is possible to prevent water from entering the inside of the connector housing, and to facilitate connection of the terminal to the connector, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a waterproof connector according to the present invention.

FIG. 2 is a side view of the waterproof connector of FIG. 1 showing a state in which a locking arm is engaged with a temporary locking projection and a terminal is inserted.

FIG. 3 is a sectional view of the same.

4 is a side view of the waterproof connector of FIG. 1 showing a state where a locking arm is engaged with a final locking projection and a terminal is inserted.

FIG. 5 is a sectional view of the same.

FIG. 6 is a perspective view showing an example of a conventional waterproof connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Waterproof connector 30 Connector housing 31 Terminal accommodating room 32 Terminal insertion part 32a Annular concave part 34 Temporary locking projection 35 Main locking projection 40 Terminal insertion part holder 41 Base 41a Terminal insertion hole 42 Locking arm (locked part)

Claims (1)

(57) [Scope of request for utility model registration] A connector housing having a cylindrical terminal insertion portion extending from the terminal housing chamber behind the terminal housing chamber and through which a terminal fitting and an electric wire connected to the terminal fitting are inserted;
A waterproof connector comprising: a terminal insertion portion holder having a terminal insertion hole opposed to the terminal insertion portion at a base portion abutting a rear end of the terminal insertion portion, wherein one of the connector housing and the terminal insertion portion holder is provided. The terminal insertion portion holder is provided along the axial direction of the terminal insertion portion on the provisional locking projection and the main locking projection provided on the A latched portion which is sequentially engaged by being relatively moved toward the connector housing; and the connector housing is provided integrally with the terminal insertion portion, and the terminal insertion portion holder is provided along the axial direction of the insertion portion. And a thin annular concave portion which is reduced in diameter by being relatively moved toward the outer periphery of the electric wire and is in close contact with the outer periphery of the electric wire by the final locking.