JP5271747B2 - Waterproof connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof connector reliably preventing immersion by preventing displacement of a mat seal, and capable of achieving efficiency improvement of a work for inserting a terminal metal fitting and a wire. <P>SOLUTION: The waterproof connector includes a connector housing 1 equipped with a terminal housing chamber for housing a terminal metal fitting, and a mat seal 2 having a plurality of terminal holes 23 capable of press fit the terminal metal fitting and a wire, and stopping water between the wire and the connector housing 1. Those connector housing 1 and mat seal 2 are molded in two colors, and structured of a resin material and a selective adhesion material adhered with each other. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a waterproof connector having an integral mat seal that prevents water from entering the connector housing.

  Conventionally, a waterproof connector described in Patent Document 1 has been proposed. As shown in FIG. 10, the waterproof connector 100 includes a plurality of terminal accommodating chambers 103 for accommodating a plurality of female terminal fittings 102 in a connector housing 101 made of a synthetic resin material. It can be inserted from the rear end of the connector housing 101 while being caulked and joined to the front end of the electric wire 104. An insertion hole 105 is provided at the rear end of the connector housing 101, and an integral mat seal (rubber plug) 106 made of an elastic material is inserted into the insertion hole 105. The mat seal 106 includes a front housing seal portion 106 a that protrudes to the outer peripheral side, and is held by a seal set portion (rubber plug holder) 107 that is attached to the rear end of the connector housing 101. The mat seal 106 is provided with a plurality of terminal holes 108 through which the electric wires 104 are inserted at positions facing the terminal accommodating chamber 103 of the connector housing 101. A lip 109 that can elastically adhere to the outer peripheral surface of the electric wire 104 is provided around the inner peripheral surface of the terminal hole 108, and a mat seal 106 having the lip 109 provides a gap between the electric wire 104 and the connector housing 101. It is designed to stop water.

  In the above configuration, first, the mat seal 106 is inserted into the insertion hole 105 at the rear end of the connector housing 101, and the mat seal 106 is held by being attached to the seal set portion 107 at the rear end of the connector housing 101. At this time, the mat seal 106 is elastically compressed by the front housing seal portion 106a being accommodated in the groove portion 101a at the rear end of the connector housing 101 and the seal set portion 107 being in pressure contact with the rear end of the front housing seal portion 106a. Is held in the state. However, the mat seal 106 is not bonded to the connector housing 101 and the seal set portion 107. Next, after the end of the electric wire 104 is inserted into the terminal fitting 102 and crimped, the terminal fitting 102 is inserted into the terminal accommodating chamber 103 from the rear end side of the connector housing 101, and the electric wire 104 is extended in the rearward direction of the terminal fitting 102. The mating seal 106 is inserted and inserted into the terminal hole 108. Next, the male terminal fitting (not shown) of the mating connector housing is inserted into the terminal accommodating chamber 103 of the connector housing 101 from the distal end side and is fitted to the terminal fitting 102, whereby the electric wire 104 and the mating electric wire are connected. Electrically connected. When the waterproof connector 100 is assembled in this way, the mat seal 106 is inserted into the insertion hole 105 at the rear end of the connector housing 101, and the outer peripheral surface of the electric wire 104 inserted into the terminal hole 108 of the mat seal 106 is elastic with the lip 109. Therefore, it is possible to prevent water and the like from entering the connector housing 101. Further, the mating connector housing also stops water between the electric wire and the connector housing by a mat seal (not shown).

JP 2006-66208 A

  In the conventional connector housing 100 described above, when the electric wires 104 are inserted one by one from the rear end side of the connector housing 101 into the terminal accommodating chamber 103 via the terminal holes 108 of the mat seal 106, the elastic force of the mat seal 106 itself is obtained. As a result, the mat seal 106 is partially distorted, so that the mat seal 106 is displaced in a direction away from the inserted electric wire 104. As a result, the terminal hole 108 of the mat seal 106 is displaced from a predetermined position. When the terminal fitting 102 and the electric wire 104 are inserted in this state, the lip 109 and the like of the mat seal 106 are damaged to reduce the waterproof property, and the terminal fitting 102 and the electric wire 104 are inserted into the terminal hole 108 of the mat seal 106. There was a problem that it became difficult.

  In addition, since the terminal fitting 102 has directionality and the rotational position in the circumferential direction centering on the shaft center is specified, the terminal fitting 102 and the electric wire 104 are connected to the rear end of the connector housing 101 one by one as described above. It is necessary to insert into the terminal accommodating chamber 103 from the side.

  In consideration of the above circumstances, the present invention prevents the mat seal from being displaced by holding the mat seal in a stable state, and more reliably prevents water from entering the connector housing. An object of the present invention is to provide a waterproof connector capable of improving the efficiency of the operation of inserting the connector into the connector housing.

The invention of claim 1 has a terminal fitting connected to the electric wire, a terminal housing chamber for accommodating the terminal fitting, a connector housing having an insertion hole in the rear wall, and the terminal fitting and the electric wire can be press-fitted. A waterproof connector including a mat seal made of an elastic material having a terminal hole and capable of being in close contact with the outer periphery of the electric wire, wherein the mat seal exhibits an adhesive force to a resin material constituting the connector housing. However, it is formed by two-color molding with the connector housing or insert molding of the connector housing with a material having selective adhesiveness that does not exhibit an adhesive force with respect to the metal material constituting the injection mold. is, the rear end surface of the mat seal, while adhering to the inner surface of the rear wall of the connector housing, after the rear end face of the mat seal Insertion portion which is projected toward the is characterized by adhering to the inner peripheral surface of the insertion hole of the connector housing.

Invention of Claim 2 is the waterproof connector of Claim 1 , Comprising: The flange-shaped collar part projected on the rear-end end of the insertion part of the mat | matte seal on the outer peripheral part of the insertion hole of a connector housing outer peripheral surface is provided. It is characterized by being molded integrally with the insertion portion.

  According to the first aspect of the present invention, when the terminal fitting and the electric wire are inserted into the terminal accommodating chamber from the end portion of the connector housing through the insertion hole of the mat seal, the mat seal is partially applied by the elastic force of the mat seal itself. Although distortion occurs, the mat seal is securely attached to the connector housing by the two-color molding or insert molding, so the mat seal is held in a stable state by the connector housing. Misalignment can be prevented. As a result, the mat seal can be prevented from being displaced as in the conventional case, and the mat seal can be prevented from being damaged by the terminal fitting and the electric wire. Since the mat seal can be smoothly inserted into the insertion hole, the efficiency of the operation of inserting the terminal fitting and the electric wire into the connector housing can be improved.

In addition , since the rear end surface of the mat seal adheres to the inner surface of the rear wall of the connector housing, and the mat seal insertion portion adheres to the inner peripheral surface of the insertion hole of the connector housing, the bonding area of the mat seal with the connector housing is reduced. Thus, the effect of preventing the mat seal from being displaced can be improved.

According to the invention of claim 2 , in addition to the effect of the invention of claim 1 , the flange-shaped flange provided at the tip of the mat seal insertion portion is adhered to the outer periphery of the insertion hole peripheral portion of the outer surface of the connector housing. As a result, it is possible to further increase the bonding area of the flange portion with the connector housing, and therefore it is possible to further improve the effect of preventing the mat seal from being displaced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of the present invention and showing a mat housing integrally formed with a connector housing of a waterproof connector. FIG. 2 shows the first embodiment of the present invention, and is a view of the connector housing and the mat seal as seen from the direction of an arrow A1 in FIG. FIG. 3 shows the first embodiment of the present invention and is a cross-sectional view taken along line III-III in FIG. 2. It is sectional drawing which shows 1st Embodiment of this invention and shows the state which removed the mat seal | sticker from the connector housing. FIG. 2 shows the first embodiment of the present invention and is a perspective view of the connector housing and the mat seal as seen from the direction of arrow A2 in FIG. FIG. 2 shows the first embodiment of the present invention and is a view of only the connector housing as seen from the direction of arrow A2 in FIG. FIG. 2 shows the first embodiment of the present invention and is a view of only the connector housing as seen from the direction of arrow A1 in FIG. 1 is a front view of a mat seal according to a first embodiment of the present invention. It is a perspective view which shows 2nd Embodiment of this invention and shows the state which integrally formed the mat seal | sticker in the connector housing of a waterproof connector. It is sectional drawing of the conventional connector housing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 8 show a first embodiment of the present invention. The waterproof connector of the present embodiment includes a connector housing 1 and a mat seal 2.

  The connector housing 1 has a substantially box shape whose front surface is open, and a terminal accommodating chamber 14 is formed therein. In the connector housing 1, an insertion hole 12 that penetrates the rear wall 15 in a rectangular shape is formed at the center of the rear wall 15. A triangular projection 13 having a substantially triangular cross section is provided on the inner surface of the rear wall 15 of the connector housing 1 so as to surround the insertion hole 12. The connector housing 1 is formed by injection molding in which molten polyamide resin is injected into a mold.

  The mat seal 2 is molded by performing two-color molding on the molded connector housing 1, and the connector housing 1 is used as a part of a molding die so that the mat seal 2 is formed on the contact surface with the connector housing 1. It is in close contact with the gap. Further, the mat seal 2 exhibits an adhesive force with respect to the polyamide resin constituting the connector housing 1, but has a selective adhesive property that does not exert an adhesive force with respect to the metal material (chrome) constituting the injection mold. Because it is molded using Shin-Etsu Chemical's “Liquid Silicon Rubber Selective Adhesive Material for Polyamide Resin” (Product Number: X-34-1625A / B, hereinafter referred to as “Selective Adhesive Material”). At the same time as molding, bonding to the connector housing 1 is performed.

  The mat seal 2 includes a main body portion 20 having a substantially rectangular parallelepiped shape and a substantially rectangular parallelepiped insertion portion 22 protruding rearward from the rear end surface 21 of the main body portion 20. A forehead portion 25 extending along the outer peripheral edge is integrally provided on the rear end surface 21 of the main body portion 20. The mat seal 2 is provided with a plurality of terminal holes 23 penetrating from the front end surface 26 of the main body portion 20 to the rear end surface 27 of the insertion portion 22. These terminal holes 23 are inserted with terminal fittings (not shown) arranged at the ends of electric wires (not shown).

  The portion of the terminal hole 23 that penetrates the insertion portion 22 is formed larger than the outer diameter of the electric wire in order to improve the workability of inserting the terminal fitting and the electric wire. Further, a lip 24 that can elastically adhere to the outer peripheral surface of the electric wire is provided around the inner peripheral surface of the portion of the terminal hole 23 that penetrates the main body portion 20, and the electric wire and the connector are provided by the mat seal 2 provided with the lip 24. Water is stopped between the housing 1.

  The rear end surface 21 and the forehead portion 25 of the mat seal 2 are bonded to the inner joint surface 11 set in a region between the triangular protrusion 13 and the insertion hole 12 on the inner surface of the rear wall 15 of the connector housing 1. The insertion portion 22 is inserted into the insertion hole 12 of the connector housing 1, and the outer peripheral surface of the insertion portion 22 is bonded to the inner peripheral surface 12 a of the insertion hole 12.

  As a procedure for assembling this waterproof connector, first, molten polyamide resin is poured into a mold to mold the connector housing 1. Next, when the polyamide resin of the connector housing 1 is solidified, the mat seal 2 is molded by using a mold for molding the terminal housing chamber 14 of the connector housing 1 and a mold for forming the outside of the rear wall 15. The mold is replaced with a mold, and the molten selective adhesive material is poured into the mold.

  Here, since the melting point of the polyamide resin constituting the connector housing 1 is set to be higher than the melting point of the selective adhesive material, the connector housing 1 is dissolved when the two-color molding is performed according to the above procedure. There is nothing. Further, since the selective adhesive material does not exert an adhesive force to the metal constituting the mold, the mat seal 2 has the rear end face 21 and the forehead portion 25 without damaging the bonding portion between the connector housing 1 and the mat seal 2. Is attached to the inner joint surface 11 of the connector housing 1 and the insertion portion 22 protruding rearward from the rear end surface 21 is adhered to the inner peripheral surface 12a of the insertion hole 12 of the connector housing 1, and the connector housing 1, The mat seal 2 is removed from the mold.

  In this way, the connector housing 1 and the mat seal 2 integrally molded are obtained, and after inserting and crimping the tip of the electric wire into the terminal fitting, the terminal fitting is inserted into the terminal accommodating chamber from the rear end side of the connector housing 1, An electric wire is arranged in a state extending rearward of the terminal fitting, and is inserted through the terminal hole 23 of the mat seal 2. Next, the mating connector housing (not shown) is inserted into the opening on the front surface of the connector housing 1, and the mating terminal fitting (not shown) is inserted into the terminal housing chamber of the connector housing 1 from the distal end side. And the mating wire is electrically connected to each other.

  When the waterproof connector is assembled in this way, the mat seal 2 is inserted into the insertion hole 12 at the rear end of the connector housing 1, and the outer peripheral surface of the electric wire inserted into the terminal hole 23 of the mat seal 2 is elastic by the lip 24. Therefore, water or the like can be prevented from entering the connector housing 1. Further, the mating connector housing is configured to stop water between the electric wire and the connector housing by a mat seal (not shown).

  As described above, according to the waterproof connector of the first embodiment, when inserting the terminal fitting and the electric wire one by one from the rear of the connector housing 1 into the terminal accommodating chamber via the terminal hole 23 of the mat seal 2, Although the mat seal 2 itself is partially distorted by the elastic force of the mat seal 2 itself, the mat seal 2 is adhered to the connector housing 1, so that the mat seal 2 is held in a stable state by the connector housing 1. The positional deviation of the seal 2 can be prevented.

  As a result, it is possible to prevent the mat seal 2 from being displaced and being damaged by the terminal fitting and the electric wire as in the prior art, so that it is possible to more reliably prevent water intrusion into the connector housing 1 and the terminal fitting and the electric wire to be mat-sealed. 2 can be smoothly inserted into the terminal hole 23, so that the efficiency of the operation of inserting the terminal fitting and the electric wire into the connector housing 1 can be improved.

  In the waterproof connector of the first embodiment, the rear end surface 21 of the mat seal 2 is bonded to the inner joint surface 11 of the connector housing 1, and the insertion portion 22 of the mat seal 2 is inserted into the insertion hole 12 of the connector housing 1. Since it is inserted and bonded to the inner peripheral surface 12a of the insertion hole 12, the bonding area between the mat seal 2 and the connector housing 1 can be increased, and the effect of preventing the displacement of the mat seal 2 can be improved. .

  In the waterproof connector according to the first embodiment, the connector housing 1 and the mat seal 2 can be integrally molded and can be bonded to each other, so that it is not necessary to apply a primer that has been conventionally required for bonding. The time required for coating and drying can be saved, and variations in adhesion due to uneven coating of the primer and the dry state can be eliminated. Therefore, the work efficiency can be improved also in this respect.

  Furthermore, in the waterproof connector according to the first embodiment, by providing the forehead portion 25, the adhesion area with the connector housing 1 can be increased, and the effect of preventing the position shift of the mat seal 2 can be further improved.

  FIG. 9 is a cross-sectional view showing a second embodiment of the present invention, in a state where a connector housing 1a and a mat seal 2a of a waterproof connector are integrally molded. In FIG. 9, the same components as those shown in FIGS.

  In addition to the configuration of the connector housing 1 of the first embodiment, the connector housing 1a of the present embodiment has a rectangular shape that is slightly larger than the rectangular shape of the insertion hole 12 on the outer surface side of the rear wall 15 and on the outer periphery of the insertion hole 12. A flange receiving portion 12b is formed which is formed of a concave portion whose diameter is increased.

  Further, a flange-like flange portion 22 a that projects from the flange receiving portion 12 b of the connector housing 1 a is formed integrally with the insertion portion 22 at the rear end of the insertion portion 22 of the mat seal 2. Similarly to the mat seal of the first embodiment, the flange portion 22a is molded together with the mat seal 2a by performing two-color molding on the molded connector housing 1, and the connector housing 1 is By using it as a part of the mold, it is in close contact with the contact surface with the connector housing 1 without a gap.

  As described above, according to the waterproof connector of the second embodiment, the flange portion 22a is bonded to the flange receiving portion 12b by adhering the flange-shaped flange portion 22a provided at the rear end of the insertion portion 22 of the mat seal 2 to the flange portion 22a. Since the bonding area with the connector housing 1 can be increased as compared with the case of the insertion portion 22 alone, the effect of preventing the mat seal 2 from being displaced can be further improved.

DESCRIPTION OF SYMBOLS 1, 1a Connector housing 2, 2a Matte seal 11 Inner joint surface 12 Insertion hole 12a Inner peripheral surface 12b Large diameter part 21 Rear end surface (end surface)
22 insertion part 22a collar part 23 insertion hole

Claims (2)

A terminal fitting connected to the wire;
A connector housing having a terminal accommodating chamber for accommodating the terminal fitting, and an insertion hole in the rear wall;
In the waterproof connector having a terminal hole capable of press-fitting the terminal fitting and the electric wire, and a mat seal made of an elastic material that can be in close contact with the outer periphery of the electric wire,
The mat seal exhibits an adhesive force with respect to a resin material constituting the connector housing, but a material having selective adhesiveness that does not exhibit an adhesive force with respect to a metal material constituting the injection mold, Molded by two-color molding with the connector housing or by insert molding to the connector housing,
A rear end surface of the mat seal adheres to an inner surface of the rear wall of the connector housing;
A waterproof connector , wherein an insertion portion projecting rearward from the rear end surface of the mat seal is bonded to an inner peripheral surface of the insertion hole of the connector housing . The waterproof connector according to claim 1 ,
A waterproof connector characterized in that a flange-like flange that projects outward from the peripheral edge of the insertion hole on the outer peripheral surface of the connector housing is formed integrally with the insertion portion at the rear end of the insertion portion of the mat seal.

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