JP2000252030A - Insulation displacement contact type waterproof connector and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring insertion holes of a rubber stopper close to insulation displacement contact positions of electric wires. SOLUTION: In this connector, a rubber stopper 30 separately formed from a housing 10 is formed with insertion holes 31 in its center height positions, while a hard resin plate 40 is stuck to the front face of the rubber stopper 30. The resin plate 40 is installed to the rear face of the housing 10 with ribs and guide grooves to freely slide up and down. When the housing 10 is set onto a insulation displacement contact mold, the rubber stopper 30 is supported in a higher position than a regularly arranged position in the rear face of the housing 10. Electric wires 35 are inserted straight through the insertion holes 31 and insertion holes 41 above insulation displacement contact blades 23 of insulation displacement contact terminals 20. When the electric wires 35 are brought into pressure-contact with the insulation displacement contact blades 23, the rubber stopper 30 is pressed down. The insertion holes 31 of the rubber stopper 30 are brought close to the insulation displacement contact positions of the electric wires 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-contact type waterproof connector and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a press-contact type waterproof connector of this type, a connector described in Japanese Patent Application Laid-Open No. 9-92384 is known. In general, a rubber plug is provided on the rear side of a housing in which a plurality of press-connecting terminals to which electric wires are connected by press-fitting are housed, and a rubber plug that penetrates the wires in a watertight manner is provided. Then, the entrance of the accommodation hole is closed with a rubber stopper.

[0003] In this case, pressure welding of electric wires is performed as follows. As shown in FIG.
A plurality of cavities d accommodating a pressure contact terminal c having a pressure contact blade b are formed side by side in a horizontal direction, a pressure contact opening e is provided on an upper surface of each cavity d, and a rear surface side of each cavity d is formed. A one-piece rubber plug f is provided integrally, and an insertion hole g through which the electric wire h can be inserted in a watertight manner is formed in the rubber plug f so as to correspond to each cavity d. In this case, the position of the insertion hole g is such that the electric wire h is
It is formed at a position higher than the press contact blade b so that it can be inserted above the press contact blade b without interference.

[0004] In the pressure welding operation, the electric wire h is passed straight through the insertion hole g of the rubber plug f, and the end thereof is brought above the pressure contact blade b. Is pressed down toward the press-contact blade b, so that the terminal of the electric wire h is press-connected (a chain line in the figure).

[0005]

However, in the prior art, the insertion position of the electric wire h with respect to the rubber plug f is higher than the position of the press contact blade b as described above. The portion protruding forward from the insertion hole g of f is bent downward while being bent. Then, the electric wire h compresses the lower surface side of the front end of the insertion hole g, and instead creates a gap on the upper surface side, and the sealing performance around the electric wire h may be impaired.

Further, since the electric wire is inserted at a position higher than the center of the rubber plug f, there is also a problem that a difference in wall thickness occurs between the upper and lower portions of the insertion hole g, and the elasticity is different, so that a uniform seal cannot be expected. there were. However, if the thickness on the upper side of the insertion hole g is made large, the seal can be made uniform. However, in this case, the rubber stopper f becomes large and the accommodation hole provided in the frame has to be enlarged, and thus the connector There was a problem that the size was increased. The present invention has been completed on the basis of the above circumstances, and an object of the present invention is to enable a rubber stopper insertion hole to be brought to a position close to a press-contact position of an electric wire.

[0007]

According to a first aspect of the present invention, there is provided an insertion hole through which an electric wire can be inserted in a watertight manner at a rear surface side of a housing accommodating a press contact terminal. Manufacturing of a press-fit type waterproof connector in which a rubber stopper formed with is provided, and an electric wire is inserted through the insertion hole to the side of the press-contact blade of the press-contact terminal, and then pressed toward the press-contact blade to perform press-contact connection. In the method, the rubber plug is slidably attached to the rear surface of the housing along the pressure contact direction of the electric wire, and the rubber stopper is pre-assembled behind the regular arrangement position in the pressure contact direction. In addition, the present invention is characterized in that the rubber plug is slid toward a regular arrangement position when the electric wire inserted into the rubber plug is pressed.

According to a second aspect of the present invention, there is provided a pressure contact type connector in which a rubber stopper having an insertion hole through which an electric wire can be inserted in a watertight manner is disposed on a rear surface side of the housing accommodating the pressure contact terminal. The rubber stopper and the housing are formed separately, and between the rubber stopper and the housing,
The present invention is characterized in that a connecting means is provided for enabling the rubber stopper to be freely slidably connected to the housing along the pressure contact direction of the electric wire.

According to a third aspect of the present invention, in the second aspect, the connecting means is capable of temporarily locking the rubber plug at a position rearward in the pressing direction from a regular arrangement position. It is characterized in that a stop is provided. The invention according to claim 4 is the invention according to claim 2 or 3,
A hard portion is provided on one of the front and rear surfaces of the rubber stopper,
It is characterized in that the coupling means on the rubber stopper side is formed in this hard portion.

[0010]

<Operation and effect of the present invention><Invention of claim 1> When an electric wire is inserted into the insertion hole with the rubber stopper first attached, the electric wire is brought to the side without interfering with the press-contact blade. You. When the electric wire is pressed against the pressing blade, the rubber stopper is slid to the proper position. The sliding of the rubber plug to the normal position may be performed simultaneously with the pressure welding of the electric wire, or before or after the pressure welding of the electric wire. Thereby, the position where the electric wire is pressed against the press-contact blade and the position of the insertion hole of the rubber plug can be matched or approached. As a result, it is possible to prevent the tensile force acting on the electric wire from being applied to the insertion hole due to the pressure contact, to prevent the insertion hole from being deformed, and to secure the sealing property. Further, even if the insertion hole is set at the center of the rubber plug, the insertion of the electric wire and the subsequent pressure contact can be performed, and as a result, the thickness of both sides of the insertion hole can be substantially equal, and a uniform seal can be achieved. . Moreover, since the rubber stopper is attached to the housing, the rubber stopper has excellent holding power.

<Invention of Claim 2> The rubber stopper is guided by the coupling means and is slid to the regular arrangement position. The above method invention can be surely carried out. <Invention of claim 3> The rubber stopper can be more reliably assembled beforehand in the pressing direction from the regular arrangement position. <Invention of claim 4> The sliding guide of the rubber stopper can be performed more smoothly.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. In this embodiment, a female waterproof connector is illustrated, as shown in FIG.
A plurality of housing accommodating chambers 2 are formed in the female-side frame 1, and the female press-contact terminals 20 are provided in each of the housing accommodating chambers 2.
Is accommodated therein. The frame 1 is fitted to a mating male frame (not shown) through a seal ring 3 in a watertight manner.

First, the structure of the housing 10 will be described. As shown in FIGS. 2 and 5, the housing 10 is formed in a flat rectangular shape as a whole, and has a plurality of cavities 11 formed therein in a lateral direction. As shown in FIG. 3, each cavity 11 has an opening on the rear side, while a front plate 12 is provided on the front side,
The front plate 12 has a terminal insertion opening 13 into which a tab of a mating male terminal fitting (not shown) is inserted. The upper surface of the housing 10 is cut out over the entire width except for a predetermined range on the front end side (right side in FIG. 3) and a small portion on the rear end, and this portion is formed into a press-fitting opening 15 into which a press-fitting tool (not shown) is inserted. It has become.

Each of the cavities 11 accommodates a press contact terminal 20. This insulation displacement terminal 2
4, a box-shaped connecting portion 21 in which a contact piece is stored is provided on the distal end side, and a groove-shaped press contact portion 22 having an open upper surface is provided behind the connecting portion 21 as shown in FIG. The press contact portion 22 has a pair of front and rear press contact blades 23 formed by cutting inward from the left and right side walls.
A barrel 24 is provided behind the press contact portion 22. Then, the press contact terminals 20 are inserted into the respective cavities 11 from behind, and as shown in FIG. 3, stop at the front by hitting the front plate 12, and a metal lance 25 formed on the upper surface of the connection portion 21 is provided. By fitting into a locking hole 17 formed in the ceiling surface of the cavity 11, the cavity 11 is accommodated in a state in which it cannot be pulled backward.

A collective rubber plug 30 is attached to the rear surface of the housing 10. The rubber plug 30 is large enough to cover the rear side of the entire cavity 11 and can be tightly fitted to the entrance of the housing accommodating chamber 2 of the frame 1 described above. Rubber stopper 3
The normal arrangement position of 0 is the center height position on the rear surface of the housing 10 as shown in FIG. At the center of the rubber plug 30 in the height direction, an insertion hole 31 that can penetrate the electric wire 35 in a watertight manner is formed at a position corresponding to each cavity 11.

A hard resin plate 40 is attached to the front surface of the rubber stopper 30 by bonding or the like. This resin plate 40
Is formed one size smaller than the outer shape of the rubber plug 30 as shown in FIG. 6, and can contact the rear surface of the housing 10. The resin plate 40 has a through hole 31 for the rubber stopper 30.
The insertion hole 41 is formed so as to be aligned.

As shown in FIG. 6, connecting portions 44 are protruded from the left and right ends of the resin plate 40 at the center height position, and opposing surfaces of both connecting portions 44 are provided as shown in FIG. In addition, a dovetail-shaped guide groove 45 is formed vertically. On the other hand, on the left and right sides of the rear end of the housing 10,
A dovetailed rib 47 slidably fitted in the guide groove 45 is formed vertically.

Next, the operation of the present embodiment will be described. In order to perform the pressure welding operation, each cavity 11 of the housing 10 is required.
The press contact terminal 20 is accommodated in the housing 1 and the housing 1
The rubber plug 30 is vertically slidably coupled to the rear surface of the resin plate 0 by fitting the guide groove 45 of the resin plate 40 into the rib 47 from above or below. Then, as shown in FIG. 7, the housing 10 is positioned and placed on the press-contact type base. At this time, the rubber stopper 30 is connected to the rib 47 and the guide groove 4.
5 is held above the regular arrangement position by the frictional resistance between the rubber plug 30 and the insertion holes 31,
41 is located at a position higher than the press-contact blade 23 of the press-contact terminal 20 housed.

When the setting of the housing 10 is completed, the electric wire 35 is inserted into the insertion hole 31 of the rubber plug 30 from the rear as shown by the arrow in FIG. The distal end of the electric wire 35 passes through the insertion hole 31, passes above the press contact blade 23 of the press contact terminal 20, and advances straight ahead (FIG. 8).

In this state, the press-contact type movable mold is driven to descend, and the press-contact tool provided therein descends through the press-contact opening 15 of the housing 10, and as shown in FIG.
Is pressed toward the pressure contact blade 23 to be connected by pressure contact, and the barrel 24 is caulked. At the same time, the pressing die provided on the movable die side descends to press the rubber plug 30 and
7 slides relatively in the guide groove 45, and the rubber stopper 30 descends to the regular arrangement position. Accordingly, the rubber stopper 30 and the insertion holes 31, 41 of the resin plate 40 are lowered to a position slightly above the pressure contact position of the electric wire 35.

When the pressing step is completed, the housing 10 and the rubber plug 30 are detached from the pressing type, and the pressing opening 15 is closed by the cover 5, so that the housing 10 and the rubber plug 30 are closed as shown in FIGS.
1 is formed. At this time, the rubber stopper 30 is disposed at a regular position on the rear surface of the housing 10. The housing 10 is mounted on the female frame 1.
Of the rubber stopper 30
Is fitted to the entrance of the housing accommodating chamber 2 as described above.

As described above, according to the present embodiment,
The rubber stopper 30 is initially supported above the regular arrangement position, and after the electric wire 35 is inserted, is pressed and simultaneously lowered to the normal position.
The insertion operation of the rubber plug 30 can be made as close as possible to the pressure-contact position of the electric wire 35 at the time of press-contact while ensuring the insertion operation without interfering with the wire 3. As a result, it is possible to avoid as much as possible that the tensile force acting on the electric wire 35 due to the pressing is applied to the insertion hole 31, the deformation of the insertion hole 31 can be prevented, and the sealing property is secured. Further, even if the insertion hole 31 is set at the center in the height direction of the rubber plug, since the insertion of the electric wire 35 and the subsequent pressure contact can be performed, the thickness of the upper and lower sides of the insertion hole 31 can be made substantially equal, and the uniformity can be obtained. Sealing can be achieved.

Moreover, since the rubber plug 30 is assembled to the housing 10, the rubber plug 30 has excellent holding power. Further, since the rib 47 of the housing 10 is slid in the guide groove 45 of the resin plate 40, the rubber stopper 30 can be smoothly slid.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the lowering operation of the rubber stopper is performed at the same time as the pressing operation of the electric wire, but may be performed before or after the pressing operation if the electric wire is inserted. (2) A temporary locking mechanism may be provided between the rib and the guide groove to hold the resin plate, that is, the rubber plug, at a position higher than the regular arrangement position. (3) Instead of attaching a separate resin plate, a hard portion may be provided on the front surface of the rubber plug by two-color molding, and a coupling portion and a guide groove may be formed in the hard portion. Alternatively, the connecting portion and the guide groove may be formed directly on the front side of the rubber stopper.

(4) Contrary to the above embodiment, a rib may be provided on the rubber stopper side and a guide groove may be provided on the housing side. (5) Further, in the pressing step, the rubber plug may be placed and supported on a vertically movable pedestal so that the rubber plug is pushed down and the pedestal is lowered when the electric wire is pressed. (6) In the above embodiment, the housing mounted on the frame has been exemplified. However, the present invention can be similarly applied to a case where the housing is fitted to the mating housing alone without being mounted on the frame. (7) The present invention can be similarly applied to a male pressure contact type waterproof connector.

[Brief description of the drawings]

FIG. 1 is a sectional view of a housing and a frame according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a housing.

FIG. 3 is a cross-sectional view of a housing in which a press contact terminal is housed.

FIG. 4 is a plan view of a press contact terminal.

FIG. 5 is a plan view showing a state where a rubber stopper is attached to a housing.

FIG. 6 is a front view of a rubber stopper.

FIG. 7 is a cross-sectional view of a state before insertion of an electric wire in a pressure welding process.

FIG. 8 is a cross-sectional view showing a state where insertion of an electric wire is completed.

FIG. 9 is a cross-sectional view showing a state where pressure welding is completed.

FIG. 10 is a cross-sectional view when assembly is completed.

FIG. 11 is a perspective view of the housing when assembly is completed.

FIG. 12 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... Cavity 15 ... Pressure contact opening 20 ... Pressure contact terminal 23 ... Pressure contact blade 30 ... Rubber stopper 31 ... Insertion hole 35 ... Electric wire 40 ... Resin plate (hard part) 41 ... Insertion hole 44 ... Coupling part 45 ... Guide groove 47 ... rib

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E012 AA05 5E051 JA07 JB02 5E087 FF15 GG25 LL11 MM06 RR12 5G333 AA09 AB05 AB24 CB18 CC04 EA02

Claims (4)

[Claims] 1. A rubber plug having an insertion hole through which an electric wire can be inserted in a watertight manner is disposed on a rear surface side of a housing in which a press-contact terminal is accommodated, and a press-contact blade of the press-contact terminal passes the electric wire through the insertion hole. In a method for manufacturing a pressure-contact type waterproof connector in which the rubber plug is inserted into the side and then pressed toward the pressure-contact blade to make a pressure-contact connection, the rubber plug extends along the pressure-contact direction of the electric wire with respect to the rear surface of the housing. The rubber plug can be slidably assembled, and this rubber plug is pre-assembled behind the normal installation position in the pressing direction, and when pressing the wire inserted through the rubber plug, the rubber plug is inserted into the proper position. A method for manufacturing a press-contact type waterproof connector, wherein the connector is slid toward an arrangement position. 2. A press-connecting connector in which a rubber plug having an insertion hole through which an electric wire can be inserted in a watertight manner is provided on a rear surface side of a housing in which a press-contact terminal is accommodated, wherein the rubber plug and the housing are provided. It is formed separately, and a connecting means is provided between the rubber plug and the housing so that the rubber plug can be slidably connected to the housing in a direction in which the electric wire is pressed against the housing. Features a pressure-resistant waterproof connector. 3. The connecting means is provided with a locking portion for temporarily locking the rubber stopper at a position rearward in the pressing direction from a regular arrangement position. 2
The crimp-type waterproof connector described. 4. A hard part is provided on one of front and rear surfaces of the rubber plug, and a coupling means on the rubber plug side is formed in the hard part. The crimp-type waterproof connector described.