JP2805430B2 - 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,
More specifically, the present invention relates to a structure for fixing a breathable tube provided to be inserted into a connector.

[0002]

2. Description of the Related Art In a harsh environment, when the operating environment is severe, a sudden temperature difference or pressure difference between the inside and the outside of the connector deteriorates the waterproofness of the packing, and the inside of the connector is immersed or dewed to short-circuit. May cause. As a countermeasure for such a case, there is a connector in which a gas permeable tube is inserted through the connector for the purpose of making the internal air pressure and the external air pressure of the connector the same.

FIG. 4 is a sectional view of a conventional waterproof connector provided with a breathable tube. The housing 1 is formed with a bulging portion 1a through which the breathable tube 3 is inserted, and the housing 1 is formed in a shape different from a conventional waterproof connector. A crimping terminal (terminal) 7 to which the cable 5 is crimped is fitted to the housing 1, and water is prevented from flowing between the housing 1, the gas permeable tube 3 and the cable 5 by a bush 9. A stopper 11 is provided on the gas permeable tube 3, and the stopper 11 prevents the gas permeable tube 3 from coming off from the bush 9. However, in order to realize this structure, it is necessary to newly manufacture the housing 1 in which the bulging portion 1a is formed, and to use a specially manufactured stopper 11 as well. there were.

As a solution to such a disadvantage, there is a waterproof connector disclosed in Japanese Utility Model Laid-Open No. 54-1197. FIG. 5 is a cross-sectional view of a conventional waterproof connector that does not use a stopper, and FIG. 6 is a cross-sectional view taken along line AA of FIG.

In this conventional example, the gas permeable tube 3 is directly crimped to the terminal 7 and the terminal 7 is fitted into a housing 13 having the same shape as that of the conventional one.
To form a waterproof connector. According to this, the same parts (housing 13) as the conventional waterproof connector are used.
And the terminal 7) can be used in common, and the breathable tube 3 can be extremely easily used without requiring any new members.
Can be obtained.

[0006]

However, in the above-described waterproof connector in which the air permeable tube 3 is directly crimped to the terminal 7, the crimping shape of the core wire crimping portion tends to vary at the time of crimping. It is difficult to stably secure the air holes 3a (see FIG. 6), and in the worst case, the air holes 3a may be closed. In addition, the crimping dimensions at the time of crimping must be extremely strictly controlled. For example, when the height H in the crimping direction (see FIG. 6) is reduced, the holding force of the permeable tube 3 is improved, but the ventilation holes 3a
When the height H is increased, on the other hand, the ventilation hole 3a can be secured, but the holding force is reduced and the gas permeable tube 3 may fall out of the terminal 7.

[0007] The present invention has been made in view of the above circumstances, and it is possible to easily and reliably secure the ventilation hole of the breathable tube without using a new member, and to obtain a high holding force of the breathable tube. It is an object of the present invention to provide a waterproof connector capable of improving the ease of manufacture and the reliability.

[0008]

In order to achieve the above object, a waterproof connector according to the present invention has a structure in which a gas permeable tube is drawn into a connector in parallel with a cable for electrical input / output, and is inserted into the connector. Wherein the slit is provided in the air permeable tube, and the core wire crimping portion of the terminal is fixed to the slit of the air permeable tube. And it is preferable that a waterproof connector is what formed the latch part between the front-end | tip of a gas-permeable tube, and a slit by leaving the outer periphery of the front-end | tip of a gas-permeable tube in the same shape.

[0009]

The core wire crimping portion of the terminal is crimped to the slit, so that the air permeable tube is not crushed, and the air hole after the terminal is fixed is secured in a perfect circle. In the breathable tube with the hook portion formed, the hook portion is hooked on the core wire caulking portion with respect to the force in the pull-out direction of the breathable tube,
The detachment of the breathable tube is structurally restricted, and the holding force of the breathable tube is increased.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a waterproof connector according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the waterproof connector of the present invention, FIG. 2 is a perspective view of a permeable tube having a slit, and FIG. 3 is an enlarged view of a terminal after the permeable tube is crimped. A partition 21 a is formed in a double-walled female housing (housing) 21 made of a synthetic resin, and the partition 21 a forms a plurality of terminal receiving chambers 23 and 25 in the housing 21. An elastically deformable locking portion 27 is formed on the partition wall 21a.
3, 25 are projected. A female terminal 29 is inserted into the terminal accommodating chamber 23, and the terminal 29 is fitted to the housing 21 and positioned by engaging with the locking portion 27. A cable 31 is crimp-connected to the terminal 29, and the cable 31 is drawn out from the rear of the terminal accommodating chamber 23 to the outside.

A ring-shaped waterproof rubber plug 33 is fitted on the outer periphery of the cable 31 and is caulked and connected together with the cable 31 by a terminal 29. The rubber plug 33 is connected to the inner wall of the terminal accommodating chamber 23 by the cable 31. Are provided in close contact to form a watertight structure. The connector pin 35 of the male housing (not shown) is inserted in front of the terminal 29 so that the terminal 29 is connected to the connector pin 35.
Will be connected.

On the other hand, a terminal 29 is
As described above, the terminal 29 is engaged with the locking portion 27 to be fitted and positioned on the housing 21. By the way, the gas permeable tube 37 is crimped to the terminal 29 of the terminal accommodating chamber 25,
Are drawn out from the rear of the terminal accommodating chamber 25 to the outside.
A rubber stopper 3 for waterproofing is also provided on the outer periphery of the breathable tube 37.
The rubber stopper 33 has a watertight structure between the inner wall of the terminal accommodating chamber 25 and the gas permeable tube 37.

As shown in FIG. 2, a slit (groove-shaped gap) 39 formed by cutting off a part of the outer periphery excluding the distal end is provided on the distal end side of the permeable tube 37. Therefore, the leading end of the gas permeable tube 37 is a hook portion 41 in which the outer periphery of the gas permeable tube 37 is left in the same shape.

The dimension W of the slit 39 in the longitudinal direction of the tube
(See FIG. 2) is slightly longer than the dimension w (see FIG. 3) of the core wire crimping portion 29a of the terminal 29. That is,
The core wire crimping portion 29a is crimped along the inner wall surface of the tube at the position of the slit 39, and is crimped so as to sandwich the tube wall surface, so that the air permeable tube 37 is not crushed and remains a perfect circular vent hole. Terminal 2 with 37a
9 is fixed.

The housing 21, the terminal 29, the air permeable tube 37, and the slit 39 are main members and parts.
A waterproof connector 43 is configured.

In the waterproof connector 43 configured as described above, the fixing of the air permeable tube 37 is not crimping in the form of crushing the tube (see FIG. 6).
7 is secured as a perfect circle. In addition, it is possible to perform crimping to a size only for obtaining a necessary fixing force without receiving other restrictions (restriction for securing the ventilation hole 37a), and easy work can be performed without particularly using nerves during crimping work. Becomes possible.

Further, the core wire caulking portion 29a is provided with a slit 39.
After being crimped, the hooking portion 41 at the tip of the tube is hooked on the shoulder of the core wire crimping portion 29a in the tube withdrawing direction, and the breathable tube 37 and the terminal 29 are structurally fixed, and the holding is more reliable. It will be.

In the above-described embodiment, the slit 39 is formed by cutting off a part of the gas permeable tube 37. However, the slit is formed by simply making a cut (a cut in the longitudinal or orthogonal direction of the gas permeable tube). It is also conceivable that the air hole 37a is formed over the tip of the air permeable tube. In such a case, similar to the above-described embodiment, it is possible to prevent the air hole 37a from being closed by crushing.
There is an effect that the slit can be easily formed.

Although the configuration of the male housing is omitted,
Needless to say, the air permeable tube 37 can be fixed in the same manner. In this case, if the connector pin 35 of the male housing facing the air permeable tube 37 is omitted, the air flow resistance in the connector becomes small, and the tube opening side The follow-up property to the pressure fluctuation can be improved. further,
In the above-described embodiment, the cable 31 and the breathable tube 37 are used.
Are shown above and below one by one. However, even a waterproof connector having a larger number of cables may be replaced by a gas permeable tube 37.
Of course, it can be applied to all waterproof connectors.

[0020]

As described above in detail, according to the waterproof connector of the present invention, the slit is provided in the permeable tube, and the core wire crimping portion of the terminal is fixed to this slit, so that the permeable tube is crushed. Thus, the ventilation holes can be easily and reliably secured. Further, if the hooking portion is formed at the tip of the permeable tube, the detachment of the permeable tube is structurally restricted, and the holding force of the permeable tube can be significantly increased. As a result, the waterproof connector can be easily manufactured, and the reliability can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a waterproof connector of the present invention.

FIG. 2 is a perspective view of a breathable tube having a slit.

FIG. 3 is an enlarged view of the terminal after the air permeable tube is crimped.

FIG. 4 is a cross-sectional view of a conventional waterproof connector provided with a breathable tube.

FIG. 5 is a sectional view of a conventional waterproof connector that does not use a stopper.

6 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 29 Terminal 29a Core wire caulking part 31 Cable 37 Breathable tube 39 Slit 41 Hook part 43 Waterproof connector

Claims (3)

(57) [Claims] 1. A waterproof connector in which a gas permeable tube is drawn into a connector in parallel with an electric input / output cable, fixed in the connector, and the inside of the connector is communicated with the outside air. A waterproof connector comprising: a tube; and a core wire crimping portion of a terminal fixed to the slit of the breathable tube. 2. The waterproof connector according to claim 1, wherein a retaining portion is formed between the distal end of the permeable tube and the slit by leaving the outer periphery of the distal end of the permeable tube in the same shape. 3. The waterproof connector according to claim 1, wherein a waterproof rubber stopper is attached, and the breathable tube is fitted into a connector housing.