JP4768641B2 - Waterproof connector - Google Patents

Description

  The present invention relates to a waterproof connector provided with a waterproof plug that prevents water from entering a terminal accommodating chamber into which a terminal to which an electric wire is connected is inserted.

  Conventionally, various so-called waterproof connectors having waterproof performance have been developed as connectors applied to automobile wire harnesses and the like.

  For example, in Patent Document 1, as shown in FIG. 9, a terminal 2 having a stabilizer 102 a protruding in one direction from an outer peripheral surface, to which an electric wire 1 is connected, an insulating housing 120 holding the terminal 2, and waterproofing A waterproof connector 110 including a plug 130 and a holder 140 is disclosed.

  The insulating housing 120 is provided with a plurality of terminal accommodating chambers 124 into which the terminals 2 connected to the electric wires 1 are inserted, and the waterproof plug 130 and the holder 140 are first electric wires through which the terminals 2 can be inserted. A plurality of insertion holes 134 and second electric wire insertion holes 144 are provided so as to correspond to the terminal accommodating chambers 124 respectively. In addition, a tapered guiding portion 135 for guiding the electric wire 1 when the electric wire 1 is inserted is formed at the rear end portion of the waterproof plug 130.

In this waterproof connector 110, the terminal 2 to which the electric wire 1 is connected is inserted into the second electric wire insertion hole 144 in a state where the waterproof plug 130 is elastically deformed between the insulating housing 120 and the holder 140. The first wire insertion hole 134 is inserted while being guided by the guide portion 135. Thereafter, the terminal 2 is further inserted into the terminal accommodating chamber 124 and held by the insulating housing 130. Then, when the inner peripheral surface of the first electric wire insertion hole 134 of the waterproof plug 130 and the outer peripheral surface of the electric wire 1 are in close contact with each other, the intrusion of water from the first electric wire insertion hole 134 into the terminal accommodating chamber 124 is prevented. Is done.
JP 2000-82529 A

  In the waterproof connector 110, when the terminal 2 is inserted into the first electric wire insertion hole 134 of the waterproof plug 130, the terminal 2 is easily inserted into the first electric wire insertion hole 134 at the initial insertion stage. . In this case, the lead-in portion 135 may be damaged by a terminal protrusion such as a stabilizer 102 a provided on the terminal 2.

  In view of such circumstances, an object of the present invention is to provide a waterproof connector that can easily insert an electric wire while more reliably suppressing damage to the waterproof plug due to the terminal protrusion of the stabilizer or the like.

  As means for solving the above problems, the present invention includes a terminal to which an electric wire is connected, an insulating housing that holds the terminal, a holder that is fixed to the insulating housing at a position behind the insulating housing, and an elastic member. A waterproof plug interposed between the holder and the insulating housing in an elastically deformed state, and the terminal has a terminal projection protruding in a predetermined direction from a part of an outer peripheral surface thereof. The insulating housing has a terminal accommodating chamber into which the terminal can be inserted from the rear, the waterproof plug is provided at a position corresponding to the terminal accommodating chamber, and the first electric wire through which the terminal is inserted from the rear The first electric wire insertion hole is provided in a portion other than the insertion hole and a portion of the rear end portion of the waterproof plug that is opposed to the terminal protrusion, and is directed rearward from the inner peripheral surface of the first electric wire insertion hole. A tapered insertion side guiding portion that is inclined in a direction away from the inserted terminal and guides the terminal to the first electric wire insertion hole when the terminal is inserted, and the terminal protrusion of the rear end portion of the waterproof plug An insertion-side recess that is provided in a portion facing the portion and is recessed from the inner peripheral surface of the first wire insertion hole at an angle larger than the inclination angle of the insertion-side lead-in portion in the protruding direction of the terminal protrusion. The holder is provided at a position corresponding to the first electric wire insertion hole, and protrudes forward from a second electric wire insertion hole through which the terminal can be inserted, and a front surface where the second electric wire insertion hole opens. And a holder-side convex portion to be inserted into the insertion-side concave portion.

  According to such a configuration, when the terminal is inserted, the terminal is guided to the first electric wire insertion hole by the insertion side guide portion provided in the waterproof plug, and the waterproof plug is more reliably damaged by the terminal protrusion. Can be suppressed.

  That is, in the rear end portion of the waterproof plug other than the portion facing the terminal protrusion, there is a tapered insertion side lead-in portion that is inclined toward the rear from the inner peripheral surface of the first electric wire insertion hole. Since it is provided, the terminal can be smoothly inserted into the first electric wire insertion hole by inserting the terminal along the insertion side guide portion. On the other hand, in the rear end portion of the waterproof plug, the portion facing the terminal protrusion is recessed in the protruding direction of the terminal protrusion from the inner peripheral surface of the first wire insertion hole, and the degree of the recess is the insertion side. Since the insertion-side concave portion that is larger than the inclination angle of the guiding portion is provided, even if the terminal has to be inserted at the start of insertion into the first electric wire insertion hole, this terminal projection portion And the waterproof plug can be suppressed, and damage to the waterproof plug by the terminal protrusion can be more reliably suppressed.

  Further, since the holder is provided with a holder-side convex portion that protrudes forward from the front surface thereof and is inserted into the insertion-side concave portion, the holder-side convex portion makes contact between the insertion-side concave portion and the terminal projection portion. Can be avoided more reliably.

  Moreover, in this invention, the surface which faces the said terminal protrusion part among the side surfaces of the said holder side convex part is flush with the surface which opposes the said terminal protrusion part among the inner surfaces of the said 2nd electric wire penetration hole of the said holder. It is preferable (Claim 2).

  In this structure, the terminal is arranged such that the terminal protrusion is along the inner surface of the second electric wire insertion hole and the surface of the holder-side convex portion that faces the terminal protrusion. It can insert in a 2 electric wire penetration hole and a 1st electric wire penetration hole. Therefore, the terminal can be inserted while the terminal posture is stabilized.

  Further, the present invention comprises a terminal to which an electric wire is connected, an insulating housing that holds the terminal, a holder that is fixed to the insulating housing at a position behind the insulating housing, and an elastic member. A waterproof plug interposed between the insulating housing and the insulating housing in an elastically deformed state, the terminal having a terminal protrusion protruding in a predetermined direction from a part of an outer peripheral surface thereof, and the insulating housing including the terminal Has a terminal accommodating chamber that can be inserted from the rear, and the waterproof plug is provided at a position corresponding to the terminal accommodating chamber, the first electric wire insertion hole through which the terminal is inserted from the rear, and the waterproof plug One that is provided in a portion of the front end portion other than the portion facing the terminal protrusion, and is separated from the terminal inserted into the first wire insertion hole as it goes forward from the inner peripheral surface of the first wire insertion hole. And a tapered lead-in portion that guides the terminal to the first wire insertion hole when the terminal is pulled out, and a portion of the front end portion of the waterproof plug that faces the terminal protrusion. An extraction side recess recessed in the protruding direction of the terminal projection from the inner peripheral surface of the first wire insertion hole at an angle larger than the inclination angle of the extraction side guiding portion, A waterproof connector is provided that has a housing-side convex portion that protrudes rearward from the rear surface of the terminal accommodating chamber and that is inserted into the extraction-side concave portion (Claim 3).

  According to such a configuration, when the terminal is withdrawn, the waterproof plug is damaged by the terminal protrusion while the terminal is guided to the first electric wire insertion hole by the extraction side guiding portion provided in the waterproof plug. It becomes possible to suppress more reliably.

  That is, in the front end portion of the waterproof plug, the portion other than the portion facing the terminal projection has a tapered extraction side guide portion that is inclined toward the front from the inner peripheral surface of the first electric wire insertion hole. Since it is provided, this terminal can be smoothly guided to the first electric wire insertion hole by extracting the terminal along the extraction side guiding portion. On the other hand, a portion of the front end portion of the waterproof plug that faces the terminal protrusion is recessed in the protruding direction of the terminal protrusion from the inner peripheral surface of the first electric wire insertion hole, and the degree of the recess is the extraction side. Since the extraction side recess is provided so as to be larger than the inclination angle of the lead-in part, even if the terminal has to be squeezed at the start of extraction into the first electric wire insertion hole, this terminal protrusion The contact between the portion and the waterproof plug can be suppressed, and damage to the waterproof plug by the terminal protrusion can be more reliably suppressed.

  Further, since the insulating housing is provided with a housing-side convex portion that protrudes rearward from the rear surface thereof and is inserted into the extraction-side concave portion, the extraction-side concave portion and the terminal projection portion are formed by the housing-side convex portion. Can be more reliably avoided.

  Further, in the waterproof connector, a surface of the side surface of the housing-side convex portion that faces the terminal protrusion is flush with a surface of the inner surface of the terminal housing chamber that faces the terminal protrusion. (Claim 4).

  In this structure, the second wire insertion portion is configured such that the terminal protrusion is along the inner surface of the terminal accommodating chamber and the surface of the housing-side convex portion that faces the terminal protrusion. It can be inserted into the hole and the first electric wire insertion hole. Therefore, it is possible to perform the extraction operation of the terminal with the terminal posture being stabilized.

  As described above, according to the present invention, it is possible to provide a waterproof connector in which a terminal can be easily inserted and damage to the waterproof plug can be more reliably suppressed.

  An embodiment of a waterproof connector according to the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded cross-sectional view of a waterproof connector according to the present invention. As shown in the figure, the waterproof connector 10 includes a metal terminal 2 to which the electric wire 1 is connected, an insulating housing 20 and a holder 40 made of resin, and a waterproof plug 30 made of an elastic member. Yes.

  As shown in FIG. 1, the terminal 2 includes a terminal protrusion 2 a that protrudes downward, an electric contact portion 2 d that is connected to the mating terminal fitting, a substrate 2 c, and a barrel portion that is crimped to the electric wire 1. 2e and a locked portion 2f that engages with a terminal holding portion 22 to be described later. As shown in FIG. 2, the terminal 2 is formed by bending a conductive metal plate with the substrate 2c as a bottom wall. The metal plate is provided with a terminal projection 2a that protrudes outward in a direction perpendicular to the longitudinal direction, and a locking hole 2b that can be engaged with the terminal projection 2a. The electric contact portion 2d is formed in a box shape by bending the terminal protrusion portion 2a and the locking hole 2b so as to engage with each other. At this time, the terminal protrusion 2a is assembled so as to protrude in one direction from the outer peripheral surface of the electric contact portion 2d, as shown in FIG. Further, the electric wire 1 is placed on the substrate 2c, and the barrel portion 2e is bent so as to be crimped to the electric wire 1, whereby the electric wire 1 is fixed to the terminal 2.

  The insulating housing 20 is for holding the terminal 2 to which the electric wire 1 is connected so that it can be connected to the mating connector. The insulating housing 20 is provided with a plurality of terminal accommodating chambers 24, a plurality of terminal holding portions 22, an accommodating wall 26, and a plurality of housing-side convex portions 28.

  The terminal accommodating chamber 24 is for accommodating the terminal 2, and the terminal holding portion 22 is provided below each terminal accommodating chamber 24. Then, the terminal 2 inserted into the terminal accommodating chamber 24 is held by the insulating housing 20 when the locked portion 2f provided below and the terminal holding portion 22 are engaged.

  The accommodating wall 26 is for accommodating the waterproof plug 30 and the holder 40 inside thereof. The housing wall 26 has a substantially cylindrical shape extending rearward from the rear surface 26a where the terminal insertion port 24a of the terminal housing chamber 24 is opened. A holder locking hole 26c that engages with a holder locked protrusion 42c of a holder 40, which will be described later, is provided below the housing wall 26. The holder-engaged protrusion 42c and the holder-engaging hole 26c engage with each other so that the holder 40 is fixed to the insulating housing 20 with the waterproof plug 30 pressed against the rear surface 26a. .

  The housing-side convex portion 28 is inserted into an outlet-side concave portion 38 of the waterproof plug 30 to be described later, and suppresses contact between the terminal protrusion 2a and the waterproof plug 30. Each of the housing-side convex portions 28 is provided in the vicinity of the opening portion of the terminal insertion port 24a of the terminal accommodating chamber 24 in the rear surface 26a, and has a shape protruding rearward from the rear surface 26a. Further, the housing-side convex portion 28 has a side surface 28 a facing the terminal projection portion 2 a on the side surface thereof and a surface facing the terminal projection portion 2 a on the inner side surface of the terminal accommodating chamber 24. It has such a shape. That is, when the terminal 2 is inserted or removed, the terminal protrusion 2a can be stably moved along the surface 28a of the housing-side convex portion 28 and the inner side surface of the terminal accommodating chamber 24. .

  The waterproof plug 30 is made of an elastic member such as synthetic rubber, and prevents the water from entering the terminal accommodating chamber 24 by elastic deformation. The waterproof plug 30 is formed in a shape that can be housed inside the housing wall 26, and is interposed between the rear surface 26 a of the insulating housing 20 and the holder 40 while being elastically deformed. The waterproof plug 30 is provided with a plurality of first electric wire insertion holes 34 through which the terminals 2 connected to the electric wires 1 can be inserted, corresponding to the terminal accommodating chambers 24. The diameter of the first electric wire insertion hole 34 is such that at least the waterproof plug 30 is elastically deformed as described above, and is smaller than the outer diameter of the electric wire 1 and the terminal 2. By inserting the terminal 2 and the electric wire 1 while being deformed, the inner peripheral surface of the first electric wire insertion hole 34 and the outer peripheral surface of the electric wire 1 are brought into close contact with each other. And by this close_contact | adherence, the penetration | invasion of the water to the terminal storage chamber 24 side from the clearance gap between the inner peripheral surface of this 1st electric wire penetration hole 34 and the outer peripheral surface of the electric wire 1 is suppressed.

  Further, the waterproof plug 30 has a shape such that the outer peripheral surface thereof is in close contact with the inner peripheral surface of the housing wall 26 of the insulating housing 20 in a state of being elastically deformed as described above. And by this close_contact | adherence, permeation of the water from the clearance gap between the waterproof plug 30 and the internal peripheral surface of the said storage wall 26 to the terminal storage chamber 24 side is suppressed.

  As shown in FIGS. 4A and 4B, the front end portion of the waterproof plug 30 is formed with an extraction side guiding portion 37 and an extraction side recess 38, and this waterproof plug The rear end portion 30 is formed with an insertion side guiding portion 35 and an insertion side recess 36.

  As shown in FIG. 8, the extraction side lead-in part 37 is configured to remove the terminal 2 from the state in which the terminal 2 is accommodated in the terminal accommodating chamber 24 and the electric wire 1 is inserted into the first electric wire insertion hole 34. This is for guiding the terminal 2 to the first electric wire insertion hole 34 when being pulled out. The extraction side guiding portion 37 is provided in a portion of the front end portion of the waterproof plug 30 other than the portion facing the terminal protrusion 2a. And it has the taper shape which inclines in the direction away from the terminal 2 as it goes ahead from the inner peripheral surface of this 1st electric wire insertion hole 34. As shown in FIG.

  The extraction side recess 38 is for avoiding contact between the terminal protrusion 2 a provided on the terminal 2 and the waterproof plug 30 when the terminal 2 is extracted. The extraction side recess 38 is provided in a portion of the front end portion of the waterproof plug 30 where the extraction side guide portion 37 is not provided, that is, a portion facing the terminal projection 2a. And it has the shape dented in the protrusion direction of the said terminal protrusion part 2a at an angle larger than the inclination angle of the said extraction side lead-in part 37 from the internal peripheral surface of said 1st electric wire penetration hole 34. As shown in FIG.

  In the present embodiment, the extraction-side recess 38 includes a tapered portion 38a having a tapered shape that inclines in the protruding direction of the terminal protrusion 2a from the inner peripheral surface of the first electric wire insertion hole 34 toward the front, and the taper. The step portion 38b is recessed from the inner peripheral surface of the portion 38a in the protruding direction of the terminal protrusion 2a. As shown in FIG. 8 and the like, the housing-side convex portion 28 of the insulating housing 20 is fitted into the stepped portion 38b.

  On the other hand, the insertion side guiding portion 35 is in a state where the waterproof plug 30 is elastically deformed between the rear surface 26a of the insulating housing 20 and the holder 40, that is, the diameter of the first electric wire insertion hole 34, as shown in FIG. When the terminal 2 connected to the electric wire 1 is inserted into the first electric wire insertion hole 34 with the diameter being smaller than the diameter of the electric wire 1 or the like, the terminal 2 is guided to the first electric wire insertion hole 34. It is. The insertion side guiding portion 35 is provided in a portion other than the portion facing the terminal protrusion 2 a in the rear end portion of the waterproof plug 30. And it has the taper shape which inclines in the direction away from the said terminal 2 as it goes back from the internal peripheral surface of this 1st electric wire insertion hole 34. As shown in FIG.

  The insertion-side recess 36 is for avoiding contact between the terminal protrusion 2 a provided on the terminal 2 and the waterproof plug 30 when the terminal 2 is inserted. The insertion-side recess 36 is provided in a portion of the rear end portion of the waterproof plug 30 where the insertion-side lead-in portion 35 is not provided, that is, a portion facing the terminal protrusion 2a. And it has the shape dented in the protrusion direction of the said terminal protrusion part 2a at an angle larger than the inclination-angle of the said insertion side lead-in part 35 from the internal peripheral surface of said 1st electric wire penetration hole 34. As shown in FIG.

  In the present embodiment, the insertion-side recess 36 includes a tapered portion 36a having a tapered shape that inclines in the protruding direction of the terminal protruding portion 2a from the inner peripheral surface of the first electric wire insertion hole 34 toward the rear, and the tapered portion. A step portion 36b that is recessed from the inner peripheral surface of 36a in the protruding direction of the terminal protrusion 2a is formed. And as shown in FIG. 8 etc., the holder side convex part 46 of the holder 40 mentioned later fits in this step part 36b.

  The holder 40 is for pressing the waterproof plug 30 against the rear surface 26a of the insulating housing 20 to be elastically deformed. The holder 40 has a shape that can be accommodated inside the accommodation wall 26 of the insulating housing 20, and has a main body portion 42 and a holder-side convex portion 46.

  The main body 42 is a substantially plate-like member that covers the waterproof plug 30 from the rear, and presses the rear end surface of the waterproof plug 30 with the front surface 42a. A plurality of second electric wire insertion holes 44 through which the terminals 2 connected to the electric wires 1 can be inserted are formed in the main body portion 42 at positions corresponding to the first electric wire insertion holes 34 of the waterproof plug 30. A holder-engaged protrusion 42 c that can be engaged with a holder-engaging hole 26 c provided in the insulating housing 20 is provided below the main body 42. The waterproof stopper 30 is elastically deformed between the front surface 42a of the main body 42 and the rear surface 26a of the insulating housing by engaging the holder locking hole 26c with the holder locked protrusion 42c. Retained.

  The holder-side convex portion 46 is inserted into the insertion-side concave portion 36 of the waterproof plug 30 to suppress contact between the terminal protrusion 2a and the waterproof plug 30. Each of the holder-side convex portions 46 is provided in the front surface 42a of the main body portion 42 in the vicinity of the opening portion of the second electric wire insertion hole 44 and has a shape protruding forward from the front surface 42a. . Further, the holder-side convex portion 46 has a side 46a on the side facing the terminal projection 2a and a portion on the inner side of the second electric wire insertion hole 44 facing the terminal projection 2a. It has a shape that is substantially flush. That is, when the terminal 2 is inserted, the terminal protrusion 2a of the terminal 2 can move stably along the inner surface of the second electric wire insertion hole 44 and the surface 46a of the holder-side convex portion 46. Yes.

  Next, a method for assembling the above components will be described.

  First, as shown in FIG. 6, the waterproof plug 30 and the holder 40 are accommodated inside the accommodation wall 26 of the insulating housing 20, and the holder engagement protrusion 42 c of the holder 40 and the holder engagement hole of the accommodation wall 26. 26c is engaged. At this time, the waterproof plug 30 is elastically sandwiched between the rear surface 26a of the insulating housing 20 and the rear surface of the housing-side convex portion 28 and the front surface 42a of the main body portion 42 of the holder 40 and the front surface of the holder-side convex portion 46. Deform.

  Next, as shown in FIG. 7A, the terminal 2 to which the electric wire 1 is connected is inserted into the second electric wire insertion hole 44 of the holder 40. At this time, the terminal 2 is inserted while the terminal protrusion 2 a is along the inner surface of the second electric wire insertion hole 44 of the holder 40 and the surface 46 a of the holder-side convex portion 46.

  Next, the terminal 2 inserted through the second electric wire insertion hole 44 is gradually expanded in the tapered insertion side lead-in portion 35 at a portion other than the portion provided with the terminal protrusion 2a in the front end portion thereof. It inserts in the 1st electric wire penetration hole 34, diametering. Thus, when the terminal 2 is inserted to the state shown in FIG. 7B, the portion of the front end portion of the terminal 2 provided with the terminal protrusion 2a comes into contact with the waterproof plug 30. The insertion side guide 35 is expanded by the front end portion as described above, and the taper portion 36a of the insertion side recess 36 is expanded to the state shown in FIG. In this state, the terminal protrusion 2 a is in contact with the surface 46 a of the holder-side convex portion 46, so that contact with the waterproof plug 30 is avoided.

  Next, the terminal 2 is further inserted forward, and the terminal protrusion 2 a is inserted into the first electric wire insertion hole 34. Here, as described above, when the terminal 2 is inserted to the position shown in FIG. 7C, the waterproof plug 30 is brought into close contact with the outer peripheral portion of the terminal 2, so that the terminal 2 is stabilized by the waterproof plug 30. Supported. In this state, the diameter of the first electric wire insertion hole 34 is sufficiently expanded by the front end portion of the terminal 2. Therefore, even if the terminal protrusion 2a is inserted into the first electric wire insertion hole 34 as described above, the terminal 2 can be inserted without damaging the waterproof plug 30 by the terminal protrusion 2a.

  After the terminal 2 is inserted into the first electric wire insertion hole 34, the terminal 2 is further moved forward so that the locked portion 2f of the terminal 2 is held by the terminal holding portion 22 as shown in FIG. Until it is inserted into the terminal accommodating chamber 24.

  Here, when the electric wire 1 is inserted into the first electric wire insertion hole 34 of the waterproof plug 30, the inner peripheral surface of the first electric wire insertion hole 34 of the waterproof plug 30 is inserted into the first electric wire insertion hole 34. 1 is in close contact with the outer peripheral surface of the first electric wire insertion hole 34, and the ingress of water into the terminal accommodating chamber 24 through the gap between the inner peripheral surface of the first wire insertion hole 34 and the outer peripheral surface of the electric wire 1 can be avoided. Further, since the outer peripheral surface of the waterproof plug 30 and the inner peripheral surface of the housing wall 26 of the insulating housing 20 are in close contact with each other, the terminal is accommodated from the gap between the outer peripheral surface of the waterproof plug 30 and the inner peripheral surface of the housing wall 26. Intrusion of water into the chamber 24 is suppressed.

  Next, a method for extracting the terminal 2 accommodated in the terminal accommodating chamber 24 in this way will be described.

  First, the engagement state of the terminal holding portion 22 and the locked portion 2f of the terminal 2 is released using a predetermined jig or the like. Next, the electric wire 1 connected to the terminal 2 is pulled backward.

  The terminal 2 to which the connected electric wire 1 is pulled moves rearward so that the terminal protrusion 2a is along the inner surface of the terminal accommodating chamber 24 and the surface 28a of the housing-side convex portion 28. The terminal 2 is guided to the first electric wire insertion hole 34 of the waterproof plug 30 by the extraction side guiding portion 37 of the waterproof plug 30, and the first electric wire insertion hole while expanding the diameter of the extraction side guiding portion 37. 34. At this time, since the terminal protrusion 2a of the terminal 2 is on the housing-side convex portion 28, even if the electric wire 1 is forcibly pulled, damage to the waterproof plug 30 by the terminal protrusion 2a is avoided.

  When the electric wire 1 is further pulled, the terminal 2 connected to the electric wire 1 is guided to the extraction side guiding portion 37 as described above, and the front end portion on the side where the terminal protrusion 2a is provided is connected to the extraction side. It is guided by the taper portion 38 a of the outlet recess 38 and moves into the first electric wire insertion hole 34. The terminal 2 is extracted outside through the first electric wire insertion hole 34 and the second electric wire insertion hole 44 provided in the holder 40.

  As described above, according to the waterproof connector 10, the rear end portion of the waterproof plug 30 is not rearward from the inner peripheral surface of the first electric wire insertion hole 34 except for the portion facing the terminal protrusion 2 a. Since the tapered insertion side lead-in portion 35 that is inclined toward the direction is provided, the terminal 2 is smoothly inserted into the first electric wire insertion hole 34 by inserting the terminal 2 along the insertion-side lead-in portion 35. can do. On the other hand, a portion of the rear end portion of the waterproof plug 30 facing the terminal protrusion 2a is recessed from the inner peripheral surface of the first electric wire insertion hole 34 in the protruding direction of the terminal protrusion 2a, and the condition of the recess When the insertion of the terminal 2 into the first electric wire insertion hole 34 is started, since the insertion side recess 36 is provided so as to be larger than the inclination angle of the insertion side guiding portion 35. Even so, the contact between the terminal projection 2a and the waterproof plug 30 can be suppressed, and damage to the waterproof plug 30 by the terminal projection 2a can be more reliably suppressed. Further, since the holder 40 is provided with a holder-side convex portion 46 that protrudes forward from the front surface 42a and is inserted into the insertion-side concave portion 36, the holder-side convex portion 46 and the insertion-side concave portion 36 and the Contact with the terminal protrusion 2a can be avoided more reliably.

  Further, as described above, the surface 46a of the holder-side convex portion 46 that faces the terminal projection 2a on the side surface thereof faces the terminal projection 2a on the inner side surface of the first electric wire insertion hole 34. If the shape is such that it is flush with the surface to be connected, the terminal 2 is inserted while the terminal protrusion 2a is along the surface 46a of the holder-side convex portion 46 and the inner side surface of the first wire insertion hole 34. Therefore, the terminal 2 can be inserted in a state in which the posture of the terminal 2 is stabilized. As a result, the terminal 2 can be more easily inserted into the first electric wire insertion hole 34.

  Further, in the waterproof connector 10, a taper that inclines toward the front from the inner peripheral surface of the first electric wire insertion hole 34 in a portion other than the portion facing the terminal protrusion 2 a in the front end portion of the waterproof plug 30. Since the lead-out side lead-in part 37 is provided, the terminal 2 is smoothly guided to the first wire insertion hole 34 by pulling out the terminal 2 along the lead-out side lead-in part 37. Can do. On the other hand, a portion of the front end portion of the waterproof plug 30 that faces the terminal protrusion 2a is recessed from the inner peripheral surface of the first wire insertion hole 34 in the protruding direction of the terminal protrusion 2a. Since the extraction side recess 38 is provided so as to be larger than the inclination angle of the extraction side guiding portion 37, the terminal 2 must be squeezed when the extraction of the terminal 2 into the first electric wire insertion hole 34 is started. Even in this case, contact between the terminal protrusion 2a and the waterproof plug 30 can be suppressed, and damage to the waterproof plug 30 by the terminal protrusion 2a can be more reliably suppressed. The insulating housing 20 is provided with a housing-side convex portion 28 that protrudes rearward from the rear surface 26 a and is inserted into the extraction-side concave portion 38. Contact between the terminal projections 2a and the terminal projections 2a can be avoided more reliably.

  Further, as described above, the surface 28a of the housing-side convex portion 28 that faces the terminal projection 2a on the side surface thereof is the surface that faces the terminal projection 2a on the inner side surface of the terminal accommodating chamber 24. The terminal 2 can be inserted while the terminal protrusion 2 a is aligned with the inner surface of the terminal accommodating chamber 24 and the surface 28 a of the housing-side convex portion 28. Accordingly, the terminal 2 can be extracted while the terminal 2 is in a stable posture. Therefore, when the terminal 2 is extracted, the terminal 2 is more easily moved to the first electric wire insertion hole 34. It becomes possible.

  Here, in the said embodiment, it showed about the case where the insertion side recessed part 36 of the said waterproof plug 30 was formed with the taper part 36a and the step part 36b dented in the direction perpendicular | vertical to the insertion direction of the electric wire 1 from this taper part 36a. However, the tapered portion 36a may not be provided and only the stepped portion 36b may be provided. Moreover, the shape of this step part 36b is not restricted to the above, but should just be dented at an angle larger than the inclination angle of the said insertion side guiding part 35.

  Similarly, the withdrawal side recess 38 of the waterproof plug 30 may be provided with only the stepped portion 38b without providing the tapered portion 38a. Further, the shape of the stepped portion 38b is not limited to the above, and it is sufficient that the stepped portion 38b is recessed at an angle larger than the inclination angle of the extraction side guiding portion 37.

  Further, the terminal protrusion 2a is not limited to a portion that engages with the locking hole 2b when the electric contact portion 2d is formed as described above, and may be anything that protrudes from the outer peripheral surface of the terminal 2. .

It is an exploded sectional view of the waterproof connector concerning the present invention. It is an expanded view of the terminal provided in the waterproof connector shown in FIG. It is sectional drawing of the insulation housing provided in the waterproof connector shown in FIG. (A) It is a front view from the back of the waterproof plug provided in the waterproof connector shown in FIG. (B) It is sectional drawing of the waterproof stopper shown to (a). (A) It is a front view from the front of the holder provided in the waterproof connector shown in FIG. (B) It is sectional drawing of the holder shown to (a). FIG. 2 is an exploded cross-sectional view of the waterproof connector shown in a state where the insulating housing, the waterproof plug, and the holder shown in FIG. 1 are assembled. (A) It is sectional drawing which shows the insertion process of a terminal. (B) It is sectional drawing which shows the insertion process of a terminal. (C) It is sectional drawing which shows the insertion process of a terminal. It is sectional drawing shown in the state which assembled the waterproof connector shown in FIG. It is an exploded sectional view of the conventional waterproof connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric wire 2 Terminal 2a Terminal protrusion part 10 Waterproof connector 20 Insulating housing 22 Terminal holding part 24 Terminal accommodating chamber 24a Terminal insertion slot 26 Accommodating wall 26a Rear surface 26c Holder latching hole 28 Housing side convex part 30 Waterproof plug 34 First electric wire insertion hole 35 Insertion side guide part 36 Insertion side recess part 36a Tapered part 36b Step part 37 Extraction side guide part 38 Extraction side recess part 38a Taper part 38b Step part 40 Holder 42c Holder locked protrusion 44 Second electric wire insertion hole 46 Holder side convex part Part

Claims (4)

A terminal to which the wire is connected;
An insulating housing for holding the terminal;
A holder fixed to the insulating housing at a position behind the insulating housing;
A waterproof plug made of an elastic member and interposed in an elastically deformed state between the holder and the insulating housing,
The terminal has a terminal protrusion protruding in a predetermined direction from a part of the outer peripheral surface thereof,
The insulating housing has a terminal accommodating chamber into which the terminal can be inserted from behind,
The waterproof plug is provided at a position corresponding to the terminal accommodating chamber, a first wire insertion hole through which the terminal is inserted from the rear, and a portion of the rear end portion of the waterproof plug that faces the terminal protrusion. Is provided in a portion other than the first wire insertion hole, and is inclined in a direction away from the terminal inserted into the first electric wire insertion hole as it goes rearward from the inner peripheral surface of the first electric wire insertion hole, and the terminal is inserted when the terminal is inserted. A taper-shaped insertion-side lead-in portion that guides to the first electric wire insertion hole and a portion of the rear end portion of the waterproof plug that is opposed to the terminal protruding portion, and more than an inclination angle of the insertion-side lead-in portion An insertion side recess recessed in the protruding direction of the terminal protrusion from the inner peripheral surface of the first electric wire insertion hole at a large angle;
The holder is provided at a position corresponding to the first electric wire insertion hole, and protrudes forward from a second electric wire insertion hole into which the terminal can be inserted, and a front surface where the second electric wire insertion hole opens. A waterproof connector having a holder-side convex portion to be inserted into the insertion-side concave portion. The waterproof connector according to claim 1,
Of the side surface of the holder-side convex portion, the surface facing the terminal projection portion is flush with the surface of the inner surface of the second wire insertion hole facing the terminal projection portion. Waterproof connector. A terminal to which the wire is connected;
An insulating housing for holding the terminal;
A holder fixed to the insulating housing at a position behind the insulating housing;
A waterproof plug made of an elastic member and interposed in an elastically deformed state between the holder and the insulating housing,
The terminal has a terminal protrusion protruding in a predetermined direction from a part of the outer peripheral surface thereof,
The insulating housing has a terminal accommodating chamber into which the terminal can be inserted from behind,
The waterproof plug is provided at a position corresponding to the terminal accommodating chamber, and the first electric wire insertion hole through which the terminal is inserted from the rear, and a portion of the front end portion of the waterproof plug other than the portion facing the terminal protrusion. Is inclined in a direction away from the terminal inserted into the first electric wire insertion hole as it goes forward from the inner peripheral surface of the first electric wire insertion hole, and the terminal is removed when the terminal is pulled out. From the inclination angle of the extraction side lead-in part provided in the taper-shaped extraction side guide part guided to the first electric wire insertion hole and the terminal projection part of the front end part of the waterproof plug An extraction side recess recessed in the protruding direction of the terminal protrusion from the inner peripheral surface of the first wire insertion hole at a large angle,
The waterproof connector according to claim 1, wherein the insulating housing has a housing-side convex portion that protrudes rearward from a rear surface that opens the terminal accommodating chamber and is inserted into the extraction-side concave portion. The waterproof connector according to claim 3,
Of the side surface of the housing-side convex portion, the surface facing the terminal projection is flush with the surface facing the terminal projection on the inner side surface of the terminal housing chamber of the insulating housing. Waterproof connector.

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