JP4762049B2 - Expansion air release structure of waterproof connector - Google Patents

Description

  The present invention relates to a structure for releasing expanded air generated inside a waterproof connector.

  Patent Document 1 listed below discloses a technique related to a waterproof plug of a waterproof connector. Specifically, a technique for a waterproof plug structure that can absorb a pressure difference between the inside and outside of the housing that occurs when the external temperature of the waterproof connector changes rapidly is disclosed. This waterproof plug has a structure in which a thin pressure absorbing portion is integrally provided at the center of an end surface, and the pressure absorbing portion expands and contracts according to a pressure change inside and outside the housing.

Considering the case where the waterproof connector is installed in the engine room for automobile wiring, even if there is a pressure change due to the repeated phenomenon of the positive pressure state and negative pressure state by using the waterproof plug having the pressure absorbing part There is an effect that the problem that the waterproof plug falls off the connector housing is prevented.
Japanese Patent Publication No.57-16474

  By the way, in the said prior art, it has a structure which respond | corresponds to a pressure change in the state which enclosed air inside the connector housing completely. Therefore, there is a possibility that pressure is always applied to the waterproof plug, and there is a problem that the waterproof plug may be deformed. In addition, when the waterproof plug is always under pressure, there is also a problem that it can be easily removed by some external force. These problems will also affect the design of the waterproof structure.

  This invention is made | formed in view of the situation mentioned above, and makes it a subject to provide the expansion | swelling air open | release structure of the waterproof connector which can aim at deformation | transformation prevention and removal prevention of a waterproof stopper.

In order to solve the above-mentioned problems, the inflating air release structure of the waterproof connector according to claim 1 of the present invention includes a first waterproof connector connected to the ground portion and a second waterproof connector connected to a desired circuit. Of the waterproof connectors that have been fitted and connected to the connector, the second waterproof connector has a connector housing and a waterproof plug, and the connector housing forms a cavity for accommodating a terminal. The terminal housing has a plurality of cavities for receiving terminals, and has empty cavities that do not receive terminals, and one end of the waterproof plug inserted into the empty cavity of the second waterproof connector is the connector housing. while being positioned within the other end is arranged in the water defunct zone that exists apart from the second waterproof connector, and the connector Pillow The linear member of the structure with a breathing passage between the inner and the object without water area provided, the linear member is characterized in that a wire having a small gap between the strands.

According to the present invention having such a feature, the air expanded in the connector housing of the waterproof connector is released to the atmosphere through the empty cavity and the linear member. The position opened to the atmosphere is a water-free area that exists away from the second waterproof connector, whereby the function as the waterproof connector is sufficiently maintained. The linear member can be attached without providing a special structure to the connector housing or the waterproof plug itself. When the expanded air in the connector housing is released to the atmosphere, the waterproof plug is prevented from being deformed or detached.

In the present invention, when an electric wire is used as the linear member, a breathing action is secured by a minute gap between the wires of the electric wire, and the atmosphere can be released. Linear member is capable of corresponding with conductive lines, waterproof plug in this case eliminates the need to use a dedicated. That is, a general waterproof plug can be used. When an electric wire is used as the linear member, the linear member becomes a dummy wire in the waterproof connector.

According to the first aspect of the present invention, there is an effect that the waterproof plug can be prevented from being deformed or detached .

  Hereinafter, description will be given with reference to the drawings. 1A and 1B are diagrams showing an embodiment of an inflating air release structure for a waterproof connector according to the present invention. FIG. 1A is a schematic overall configuration diagram, and FIG.

  In FIG. 1, reference numerals 1 and 2 indicate a waterproof connector used for grounding although not particularly limited. The waterproof connector 1 is provided for direct connection to the ground part 3. On the other hand, the waterproof connector 2 is provided so as to be connected to a desired circuit 4 and to be fitted and connected to the waterproof connector 1 in this state. The waterproof connector 2 has a characteristic structure according to the present invention. Hereinafter, the present invention will be described with reference to such waterproof connectors 1 and 2.

  The waterproof connector 1 includes a connector housing 5, a male terminal 6 accommodated in the connector housing 5, and a seal member 7 that is in close contact with the waterproof connector 2. The connector housing 5 is formed with a terminal accommodating cavity (not shown) for the male terminal 6 and a fitting portion 8 for forming a fitting space for the waterproof connector 2. The male terminal 6 is connected to the ground part 3. The male terminal 6 is arranged and fixed so that the electrical contact portion is electrically connected to the waterproof connector 2. The seal member 7 is attached to the fitting portion 8. The seal member 7 is formed to be an annular member.

  The waterproof connector 2 includes a connector housing 9, a female terminal 10 accommodated in the connector housing 9, waterproof plugs 11 and 12, and a dummy wire (linear member) 13. In the connector housing 9, a terminal accommodating cavity 14 for the female terminal 10 is formed in two upper and lower stages. The female terminal 10 is accommodated and fixed in the upper cavity 14. On the other hand, the lower cavity 14 does not receive the female terminal 10 and is an empty cavity, that is, an empty cavity. The connector housing 9 is configured such that a sealing member 7 of the waterproof connector 1 is in close contact with the outer surface to form a watertight and airtight structure.

  The female terminal 10 is provided at the end of a known electric wire 15. The female terminal 10 is arranged and fixed so that the electrical contact portion is electrically connected to the male terminal 6 of the waterproof connector 1. A rubber waterproof plug 11 is inserted into the electric wire 15 in advance. After the female terminal 10 is connected to the end of the electric wire 15, the waterproof plug 11 is moved to the position of the female terminal 10 and attached. The waterproof plug 11 is inserted into the cavity 14 when the female terminal 10 is mounted and accommodated, and is in close contact with the cavity 14 to form a watertight and airtight structure. The electric wire 15 is connected to the circuit 4 (assumed to be an example. The electric wire 15 may be branched from a wire harness, for example).

  The waterproof plug 12 is the same as the waterproof plug 11 inserted through the electric wire 15, and is inserted into the lower cavity 14 serving as an empty cavity. The waterproof plug 12 is in close contact with the empty cavity 14 to form a watertight and airtight structure. Such a waterproof plug 12 is inserted through a dummy wire (linear member) 13 in advance and then inserted into an empty cavity 14.

One end of the dummy wire 13 is disposed in an empty cavity 14 and the other end is disposed in a water-free area 16 that is separated from the waterproof connector 2 (the waterproof connectors 1 and 2 require waterproofing). It is installed in area 17). The dummy line 13 has a length necessary for wiring up to the area 16 without water. In this embodiment, the dummy wire 13 is made of the same known wire as the wire 15, and a breathing path (not shown) is formed by a minute gap between the strands so as to ensure a breathing action. Tei Ru.

  In the above configuration, when the waterproof connectors 1 and 2 are fitted, air is trapped inside the waterproof connectors 1 and 2 due to the presence of the seal member 7 and the waterproof plugs 11 and 12. If the waterproof connectors 1 and 2 are installed in the engine room in this state, a pressure change is received when a repeated phenomenon of a positive pressure state and a negative pressure state occurs. However, according to the present invention, the air expanded inside the waterproof connectors 1 and 2 travels along the breathing path (not shown) of the dummy wire 13 as this escape place, and from the other end of the dummy wire 13 to the atmosphere in the water-free area 16. To be released. Accordingly, it is possible to prevent the waterproof plugs 11 and 12 from being deformed or prevented from coming off.

  According to the present invention, it is a structure for releasing the expansion air generated inside the waterproof connectors 1 and 2, and prevents the deformation of the waterproof plugs 11, 12, etc., and prevents them from coming off, thereby functioning as a connector more than conventional ones. There is an effect that can be increased or maintained.

  In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

It is a figure which shows one Embodiment of the expansion air release structure of the waterproof connector of this invention, (a) is typical whole block diagram, (b) is principal part sectional drawing of a waterproof connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Waterproof connector 3 Ground part 4 Circuit 5, 9 Connector housing 6 Male terminal 7 Seal member 8 Fitting part 10 Female terminal 11, 12 Waterproof plug 13 Dummy wire (linear member)
14 Cavity 15 Electric wire 16 Area without water 17 Area that needs waterproofing

Claims (1)

Of the waterproof connectors that are connected by fitting the first waterproof connector connected to the ground portion and the second waterproof connector connected to a desired circuit, the second waterproof connector includes a connector housing and A waterproof connector inflating air release structure having a waterproof plug and forming a terminal accommodating cavity in the connector housing,
A plurality of cavities for accommodating the terminals, and an empty cavity that does not accommodate the terminals;
One end of the waterproof plug inserted into the empty cavity of the second waterproof connector is disposed in the connector housing, and the other end is disposed in a water-free area existing away from the second waterproof connector. And a linear member having a structure having a breathing path between the inside of the connector housing and the water-free area ,
An expansion air release structure for a waterproof connector, wherein the linear member is an electric wire having a minute gap between strands .

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