JPH05258800A - Screw-fastened connector with waterproofing cover - Google Patents

Abstract

PURPOSE:To provide a screw fastened type connector which is capable of reducing the manufacturing costs. CONSTITUTION:Head 33b of a bolt 33 is exposed outside of a waterproof cover 37 of a screw fastened type connector 25, and the cover 37 is compressed by this bolt head 33b and the back of connector housing 45 in the condition that the connector housings are in perfect fit to one another. With the resilient force of this waterproof cover 37, the bolt 33 is energized in the direction that the bolt head 33b goes apart from the back of the connector housing 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw type connector having a waterproof cover.

[0002]

2. Description of the Related Art In recent years, along with the diversification of various electrical components mounted on automobiles and the like, connectors connected to wire harnesses tend to have multiple poles and increase in size. However, in such a multi-pole and large-sized connector, a large amount of force is required for mating and unmating the male and female connector housings in which the male and female terminal fittings are respectively inserted, so the structure of the bolt and nut is used. Thus, a so-called screw tightening type connector in which connector housings are fitted to each other has been proposed.

However, a strict dimensional relationship is required for fitting the male and female connector housings together,
In particular, the dimensional relationship between the threaded portion of the bolt and the nut is important. For example, since the material of the connector is formed of synthetic resin, if the bolts are further tightened after the connector housings are completely fitted together, the connector housing will be destroyed.

Therefore, Japanese Patent Publication No. 1-57471 proposes a screw tightening type connector having a structure in which a bolt idles with respect to a nut when the connector housings are completely fitted to each other.

3 (a) and 3 (b) show the screw tightening type connector 1 proposed in the above publication. In these drawings, in the screw tightening type connector 1, a bolt 5 is rotatably inserted in a connector housing 3 of a female connector, and a nut 9 is embedded in a connector housing 7 of a male connector. Further, in this screw tightening type connector 1, a spring member 11 is interposed between the head portion 5a of the bolt 5 and the rear surface side 3a of the connector housing 3, and the bolt 5 is pulled out from the rear surface side of the connector housing 3. It is biased in the direction (the direction of arrow a in the figure).

When the connector housing 7 is fitted into the connector housing 3, as shown in FIG. 3 (a), the connector housing 3 and the connector housing 7 are joined together.
After facing and, the male screw portion 5b of the bolt 5 is screwed into the female screw portion 9a of the nut 9 to fit the connector housing 3 into the connector housing 7.

When the connector housing 3 is completely fitted in the connector housing 7, as shown in FIG. 3B, the male screw portion 5b of the bolt 5 is the female screw portion 9a of the nut 9.
No matter how many times the bolt 5 is disengaged and rotated, the bolt 5 will idle and the connector housings 3 and 7 will not be tightened. This can prevent the connector housing from being broken.

Further, when the connector housings 3 and 7 are detached, the bolt 5 is urged by the spring member 11 in the direction away from the rear surface side of the connector housing 3, so that the male screw portion 5b of the bolt 5 is removed. The rear end is pressed by the front end of the female screw portion 9a of the nut 9, and the male screw portion 5b can be easily hooked on the female screw portion 9a.

Further, Japanese Utility Model Laid-Open Publication No. 1-135655 proposes a screw tightening type connector having a structure in which a bolt idles with respect to a nut when the connector housings are completely fitted together.

FIG. 4A shows the screw tightening type connector 13 proposed in the above publication. In this figure, in this screw tightening type connector 13, a bolt 17 is rotatably inserted in a connector housing 15, and a nut 21 is embedded in a connector housing 19. The screw tightening type connector 13 is provided with a screwing auxiliary spring member 23 on the connector housing 15.

When fitting the connector housings 15 and 19, as shown in FIG. 4A, the connector housing 15 and the connector housing 19 are opposed to each other, and then the bolt 17 is screwed into the nut 21. Then, when the bolt 17 is rotated to project from the nut 21, the tip end portion of the bolt 17 contacts the screwing auxiliary spring member 23,
The bolt 17 urges the connector in the direction in which the connector is pulled out from the housing 15 (the direction of arrow a). Further, when the bolt 17 is rotated, the male screw portion of the bolt 17 is disengaged from the female screw portion of the nut 21. In this state, the bolt 17 idles,
The connector housings 15 and 19 are not tightened.

Further, when the connector housings 15 and 19 are detached, the bolt 17 is biased by the screwing auxiliary spring member 23, so that the threaded portion 17a of the bolt 17 is formed.
So that it can be easily screwed into the nut 21.

There is also one that uses a flexure of a pair of disc springs as an urging means for engaging the thread of the bolt with the thread of the nut when the connector housings are separated from each other.

[0014]

However, the screw tightening type connectors proposed in the above publications use a spring member for assisting the screwing of the bolt to the nut when the connector housings are separated from each other. Therefore, there is a problem that the number of parts is large and the manufacturing cost is high.

When using a pair of disc springs, it is necessary to engage the pair of disc springs with the bolt before assembling the bolt to the connector housing. This engagement work is very troublesome.

In consideration of the above circumstances, the present invention has an object to provide a screw tightening type connector which can reduce the number of parts and can be easily assembled.

[0017]

In order to achieve the above object, the present invention exposes the heads of bolts on the outside of a waterproof cover, and when the connector housings are completely fitted, the heads of the bolts and one connector housing. The waterproof cover is compressed between the back side of and the elastic force of this waterproof cover,
It is characterized in that the bolt head urges the bolt in a direction in which the bolt head is separated from the rear surface side of the connector housing.

[0018]

In the screw-fastened type connector of the present invention, the elastic force of the waterproof cover that covers one connector housing urges the bolt in the direction away from the rear side of the connector housing, so that the threaded portion of the bolt is the thread of the nut. It is pressed against the department.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a screw tightening type connector having a waterproof cover according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a male connector 27 of a screw tightening type connector (hereinafter referred to as "screw tightening type connector") 25 having a waterproof cover according to the present invention. Also, FIG.
(A) is a male connector 27 of the screw tightening type connector 25.
2 (b) shows a completely fitted state of the female connector 31 and
Shows an enlarged cross section of a part of the male connector 27.

In these drawings, the screw tightening type connector 25 is a female type connector 31 having a male type connector 27 and a fitting hood portion 29 into which the male type connector 27 is fitted.
And a bolt 33 penetrating the male connector 27 and a nut 3 embedded in the female connector 31 and screwed into the bolt 33.
5 and a waterproof cover 37 that covers the male connector 27.

Connector housing 4 of male connector 27
Reference numeral 5 denotes two terminal fitting housing blocks 3 in which a plurality of terminal housing chambers 51 for housing female terminal fittings (not shown) are formed.
9 and 41 are integrally formed via a hollow connecting portion 43.

A support wall portion 53 is formed in the middle of the hollow connecting portion 43, and an auxiliary portion insertion portion 57 for inserting a screwing auxiliary portion 55 of a waterproof cover 37 described later and a bolt 33 described later. Male screw insertion portion 5 into which the male screw portion 33a of
It is divided into 2 rooms, 9 rooms. Further, a bolt insertion hole 63 into which the collar 61 is fitted is formed at the center of the support wall portion 53.

A flat plate-like flange portion 49 attached to the waterproof cover 37 is integrally formed on the rear surface side of the connector housing 45.

The female connector 31 includes a fitting hood portion 29 into which the connector housing 45 of the male connector 27 is inserted and fitted, a connector housing 65 having a plurality of terminal accommodating chambers (not shown), and a nut. And a nut embedding portion 71 that is embedded and inserted into the hollow connecting portion 43 of the male connector 27, and is housed in the terminal accommodating chamber 51 of the male connector 27 in the terminal accommodating chamber. A male terminal fitting (not shown) that fits into a female terminal fitting (not shown) is housed, and the tip end portion thereof is provided so as to project into the fitting hood portion 29. Further, the nut embedding portion 71 is hollow, and the nut 35 is press-fitted into the axially intermediate space portion. Then, the nut 35 is attached to the male screw portion 33a of the bolt 33 inserted into the hollow interior.
The female threaded portion 35a can be screwed.

The bolt 33 comprises a head portion 33b, an insertion portion 73 through which the male connector 27 is inserted, an idle portion 75 having a diameter slightly smaller than this insertion portion, and a male screw portion 33a engraved on the tip side of the idle portion 75. .

In the waterproof cover 37, cover portions 81 and 83 are formed around the openings 47 formed at both ends of the bellows-shaped wire harness insertion portion 77, and the end surfaces of these cover portions 81 and 83 are respectively formed. , The elastic seal portion 81a,
83a are formed on the entire outer circumference. Fitting grooves 85 and 87 are formed on the entire inner circumferences of the cover portions 81 and 83, respectively. The flange portion 49 of the connector housing 45 is fitted in the fitting groove 85, and the flange portion of the connector (not shown) is fitted in the fitting groove 87.

From the inner wall of the cover 81,
The screwing assisting portion 55 having elasticity is projectingly provided, and the hollow connecting portion 4
3 is inserted into the auxiliary portion insertion portion 57, and the tip end surface is in contact with the support wall portion 53. A bolt insertion hole 89 that opens to the outside of the waterproof cover 37 and the bolt insertion hole 63 is formed at the center of the screwing assisting portion 55. As shown in FIG. 2B, annular lips 60 and 62 for sealing are provided on the inner wall of the bolt insertion hole 89 so as to project. Between the sealing annular lips 60 and 62, the screwing assisting portion 5 is provided.
The reinforcing resin grommet collar 91 of 5 is embedded.

Inside the bolt insertion hole 63 of the support wall portion 53 and the bolt insertion hole 89 of the cover portion 81, the cover portion 81 is provided.
The head portion 33b is exposed to the outside of the casing through the washer 93, and the male screw portion 33a at the tip portion is inserted so as to be located in the male screw insertion portion 59 of the hollow connecting portion 43.
The push nut 95 is fitted to the male screw insertion portion 59 side of the screw 3 to prevent the bolt 33 from coming off. In this state, the bolt 33 is always urged by the elastic force of the screwing assisting portion 55 in the direction away from the rear surface side of the connector housing 45.

A method of fitting / disengaging the male connector 27 and the female connector 31 in the screw tightening type connector 25 will be described. The male connector 27 is
The waterproof cover 37 and the bolt 33 are previously assembled to the connector housing 45. This male connector 27
Insert the nut embedding portion 71 into the male hood portion 29 of the female connector 31 located on the opposite side through the panel P, and insert the nut embedding portion 71 into the male screw insertion portion 59 of the hollow connecting portion 43 to form the male screw portion 33a of the bolt 33. Is the female screw portion 35a of the nut 35
Screw into. Then, the head 33b of the bolt 33 is rotated using a tool or the like to tighten the bolt 33 to the nut 35.

The connector housing 45 is fitted with the hood portion 2.
9 is completely fitted, the male screw portion 33a of the bolt 33 is
Is disengaged from the female screw portion 35a of the nut 35, and the bolt 33 idles. Further, in this state, the bolt 33 is urged by the elastic force of the screwing assisting portion 55 of the cover portion 81 so that the head portion 33b is separated from the connector housing 45, and the rear end of the male screw portion 33a is in the nut 35. Is pressed against the front end of the female screw portion 35a.

The connector housing 45 is fitted with the hood portion 2.
To remove from the state of being completely fitted in 9, the bolt 33 is reversely rotated, the male screw part 33a is screwed again to the female screw part 35a of the nut 35, and the bolt 33 is further reversely rotated. The screwed state of the bolt 33 and the nut 35 is released. At this time, the male screw portion 33a is easily screwed into the female screw portion.

According to this embodiment, the elastic force of the waterproof cover 37 always urges the bolt 33 in the direction away from the rear surface of the connector housing 45. Since separate parts are not necessary and the work for assembling separate parts is not necessary, erroneous assembly does not occur, and reliability during work can be improved.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the bolt 33 is inserted into the male connector 27 and the nut 35 is embedded in the female connector 31, but the nut 35 is embedded in the male connector 27 and the female connector 31 is embedded in the female connector 31. The bolt 33 may be inserted. Further, in the above embodiment, the waterproof cover 37
Although the grommet collar 91 is embedded in the screwing assisting portion 55 provided in to increase the elastic force, the grommet collar 91 does not have to be embedded. Further, in the above embodiment,
A screwing assist portion 55 is provided on the waterproof cover 37 so as to project from the inner wall,
Although the elastic force of the screwing assisting portion 55 is used, it is not necessary to provide the screwing assisting portion 55 on the waterproof cover 37, and the waterproof cover between the head of the bolt 33 and the back side of the connector housing 45 is used. You may.

[0035]

As described above, according to the screw tightening type connector of the present invention, the elastic force of the waterproof cover urges the bolt head in the direction in which the head portion of the bolt is separated from the rear side of the connector housing. The number of parts can be reduced and the assembling work becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a male connector of a screw tightening type connector according to the present invention.

FIG. 2A is a sectional view showing a fitted state of a male connector and a female connector, and FIG. 2B is a sectional view showing an enlarged state of a screwing assisting portion.

3A and 3B are cross-sectional views showing a conventional screw tightening type connector, in which FIG. 3A shows a state before screwing a bolt into a nut, and FIG. 3B shows a state in which a bolt is screwed into a nut.

FIG. 4 shows another conventional screw tightening type connector, (a)
FIG. 4B is a sectional view showing a state before the bolt is screwed into the nut, and FIG.

[Explanation of symbols]

 25 screw tightening type connector 27 male type connector 31 female type connector 33 bolt 33a male screw part 33b head 35 nut 35a female screw part 37 waterproof cover 45 connector housing 53 support wall part 55 screwing auxiliary part

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[Procedure amendment]

[Submission date] July 17, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

[0020] Figure 1 is a screw tightening type connector having a waterproof cover according to the present invention (hereinafter referred to as "screw tightening type connector") shows the male connector 27 of the 25. In addition, FIG.
Shows a completely fitted state of the male connector 27 and the female connector 31 of the screw tightening type connector 25, and FIG. 2B shows a partially enlarged cross section of the male connector 27.

Claims (1)

[Claims] 1. A connector housing provided with a waterproof cover is rotatably provided with a bolt having a threaded portion formed at a tip portion of a shaft portion, and a nut is provided on the other connector housing to completely connect the connector housings. In a screw tightening type connector having a waterproof cover in which the threaded portion of the bolt is inserted into the threaded portion of the nut in a fitted state and the bolt is in an idling state, the head of the bolt is exposed to the outside of the waterproof cover, In a completely fitted state of the connector housings, the waterproof cover is compressed between the head of the bolt and the rear side of the one connector housing, and the elastic force of the waterproof cover causes the head of the bolt to move to the connector housing. Screw type connector having a waterproof cover, characterized in that the bolt is biased in a direction away from the back side of the .