JP6370210B2 - Waterproof connector - Google Patents

Description

  The technology disclosed by this specification is related with a waterproof connector.

  Conventionally, as a waterproof connector provided with a batch rubber stopper, for example, a connector described in Japanese Patent Application Laid-Open No. 2009-129985 (Patent Document 1 below) is known. This waterproof connector has a mounting part where the batch rubber plug can be fitted without looseness, and the rubber plug holder is fitted to this mounting part so that the batch rubber plug is prevented from coming off at the mounting part. Is retained. Furthermore, the expansion member is attached to the rubber plug holder, and this expansion member is movable in the front-rear direction between the expansion position and the expansion release position. In the expansion position, the cylindrical portion provided in the expansion member enters the seal hole of the batch rubber stopper, and is elastically deformed so as to expand the seal hole. On the other hand, in the expansion release position, the cylinder portion is retracted to the rear of the seal hole, so that the seal hole is elastically returned to the original size.

JP 2009-129985 A

  However, in the waterproof connector described above, the rear end of the expansion member is behind the rubber plug holder even when the expansion member is moved to the maximum rearward, that is, even when the expansion member is disposed at the expansion release position. It stays at a position aligned with the end, and the distance from the rear end of the expanding member to the seal hole is short. For this reason, when the electric wire is shaken, the vibration of the electric wire is easily transmitted to the seal hole, thereby expanding the diameter of the seal hole, and the lip portion provided on the inner peripheral surface of the seal hole is in close contact with the outer peripheral surface of the electric wire. By eliminating, there is a possibility that the sealing performance is lowered.

  The waterproof connector disclosed in this specification includes a batch rubber plug having a plurality of seal holes in which a plurality of electric wires are arranged in a sealed state, a rubber plug mounting portion to which the batch rubber plug is mounted, and the batch rubber. A rubber plug holder that prevents the batch rubber plug from coming off by being mounted on the rubber plug mounting portion from the rear of the plug; a guide portion that protrudes rearward from a rear end of the rubber plug mounting portion; and the guide A wire run-out restraining member that is mounted on the portion and is provided with a plurality of insertion holes through which the plurality of wires are respectively inserted in the front-rear direction. The wire run-out restraining member includes an outer peripheral surface of the wire and the seal It is possible to move between an approach position that enters between the inner peripheral surface of the hole and a retracted position that is retracted to the rear of the seal hole, and at the retracted position, the wire vibration suppression member is disposed behind the rubber plug holder. Behind the edge It has a configuration that is the aspect that out.

  According to such a configuration, the electric wire shake suppressing member can suppress the electric wire shake in the seal hole of the batch rubber stopper. That is, since the rear end of the wire shake suppression member protrudes rearward from the rear end of the rubber plug holder, and the distance from the rear end of the wire shake suppression member to the seal hole is sufficiently long, Even if the electric wire sways behind the member, the sway of the electric wire is not transmitted to the seal hole, and the sealing performance does not deteriorate.

The waterproof connector disclosed by this specification is good also as the following structures.
The wire shake suppressing member includes a main body portion mounted on the guide portion, and a plurality of cylindrical portions provided in a cylindrical shape along the plurality of insertion holes respectively from the front end surface of the main body portion. In the approach position, the front end surface of the main body may be in contact with the rubber plug holder from behind so that the wire vibration suppression member is stopped in front.
According to such a configuration, the front end surface of the main body portion comes into contact with the rubber plug holder from the rear side, so that the wire shake suppression member is stopped in front. Can be positioned.

In the entry position, the front end of the cylindrical portion passes through the seal hole and is positioned at the front end of the collective rubber plug so that the seal hole is expanded in diameter so that the collective rubber plug does not contact the outer peripheral surface of the electric wire. It is good also as a structure.
According to such a structure, when inserting an electric wire with a terminal into a seal hole from back, it can prevent that a lump rubber stopper is damaged by the tip of a terminal.

In the retracted position, the inner peripheral surface of the seal hole may be in close contact with the outer peripheral surface of the electric wire by positioning the front end of the cylindrical portion at the rear end of the collective rubber plug.
According to such a configuration, after inserting the electric wire into the seal hole, the inner peripheral surface of the seal hole can be brought into close contact with the outer peripheral surface of the electric wire by moving the electric wire shake suppressing member from the entry position to the retracted position. The sealing performance can be exhibited.

The retracted position may be configured such that the rear end of the main body portion is aligned with the rear end of the guide portion in the front-rear direction.
According to such a configuration, the wire shake suppressing member can be protected by the guide portion at the retracted position.

  According to the waterproof connector disclosed by this specification, the electric wire shake suppression member can suppress the shake of the electric wire in the seal hole of the collective rubber plug, and can prevent the sealing performance from deteriorating.

Longitudinal section showing components of waterproof connector Cross-sectional view showing components of waterproof connector Longitudinal sectional view showing the state before inserting the electric wire with terminal into the insertion hole of the rear holder A longitudinal sectional view showing a state in the middle of inserting the electric wire with terminal into the insertion hole of the rear holder Longitudinal sectional view showing a state where the electric wire with terminal is inserted into the insertion hole of the rear holder and the rear holder is moved to the retracted position Cross section showing the rear holder in the entry position Cross section showing the rear holder in the retracted position

<Embodiment>
The embodiment will be described with reference to the drawings of FIGS. As shown in FIG. 1, the waterproof connector 10 in the present embodiment includes a housing 20, a batch rubber plug 30, a rubber plug holder 40, and a rear holder 50. In the following description, the left side of FIG. 1 is the front side, and the right side of FIG. 1 is the rear side.

  The housing 20 includes a housing body 21 made of a synthetic resin and a front retainer 23 that is fitted to the terminal accommodating portion 22 of the housing body 21 from the front. A rubber ring 70 is attached to the outer periphery on the proximal end side of the terminal accommodating portion 22. The rubber ring 70 is retained by the front retainer 23. The housing main body 21 has a hood portion 24 that opens forward, and the terminal accommodating portion 22 is provided in a manner that protrudes forward from the back wall 25 of the hood portion 24.

  A rubber plug mounting portion 26 to which the batch rubber plug 30 is mounted is provided behind the terminal accommodating portion 22. The rubber plug mounting portion 26 is provided in a manner that protrudes rearward from the back wall 25 of the hood portion 24 and has a form that opens rearward. The terminal housing portion 22 and the rubber plug mounting portion 26 constitute a cavity for housing the terminal 61 of the terminal-attached electric wire 60, and the inside of the terminal housing portion 22 and the inside of the rubber plug mounting portion 26 communicate with each other.

  As shown in FIG. 1 and FIG. 2, a plurality of holding holes 26 </ b> A for holding the rubber plug holder 40 are respectively provided in the upper and lower wall portions constituting the rubber plug mounting portion 26. In the present embodiment, a plurality of holding holes 26A are provided in pairs on the upper wall portion and the lower wall portion of the rubber plug mounting portion 26, respectively. On the other hand, the rubber plug holder 40 is formed in a flat plate shape, and a plurality of holding projections 41 that are fitted into the holding holes 26A are provided on the peripheral edge thereof. The rubber stopper holder 40 is attached to the rubber stopper attachment portion 26 in a press-fit manner. When each holding projection 41 is fitted and locked in each holding hole 26 </ b> A, the rubber plug holder 40 is fixed to the rubber plug mounting portion 26, and the batch rubber plug 30 that is also mounted on the rubber plug mounting portion 26. Is designed to keep you from falling out. The rubber plug holder 40 is provided with a mounting hole 42 at a position corresponding to the seal hole 31 of the rubber plug 30.

  As shown in FIG. 2, at the rear end of the rubber plug mounting portion 26, a pair of guide walls 27 are provided so as to protrude rearward and continue to the rubber plug mounting portion 26. Each guide wall 27 is arranged in a state of being opposed in the width direction (the vertical direction in FIG. 2), and each guide wall 27 has a substantially gate shape when viewed from the rear and is open toward each other. ing. More specifically, the guide wall 27 includes a side wall 28A, a ceiling wall 28B extending inward in the width direction from the upper edge of the side wall 28A, and a bottom wall 28C (see FIG. 1) extending inward in the width direction from the lower edge of the side wall 28A. It is configured with.

  The side wall 28A of each guide wall 27 is provided with a temporary locking hole 27A and a main locking hole 27B. The temporary locking hole 27A and the main locking hole 27B are provided side by side in the front-rear direction, and the main locking hole 27B is disposed behind the temporary locking hole 27A. More specifically, the temporary locking hole 27A is disposed near the front end of the side wall 28A, and the main locking hole 27B is disposed near the rear end of the side wall 28A. Further, the temporary locking hole 27A is disposed on the rear side of the holding hole 26A of the rubber plug mounting portion 26 in the front-rear direction.

  An upper slit 27C is provided between the ceiling walls 28B of each guide wall 27, and a lower slit 27D (see FIG. 1) is provided between the bottom walls 28C. These slits 27 </ b> C and 27 </ b> D are spaces for inserting fingers from above and below when the rear holder 50 is moved in the front-rear direction.

  A tapered guide surface 29 is provided on the inner peripheral edge at the rear end of each guide wall 27. When the batch rubber plug 30 is mounted on the rubber plug mounting portion 26, the batch rubber plug 30 is guided between the guide walls 27 while being in contact with the guide surface 29, and is pushed forward from here, thereby the rubber plug mounting portion. 26 is accommodated in a compressed state.

  As shown in FIGS. 1 and 2, the collective rubber plug 30 is provided with a plurality of seal holes 31 into which the electric wires W are inserted side by side in the width direction. On the peripheral surface of the seal hole 31, a plurality of inner peripheral lips 32 are provided side by side in the front-rear direction. When the electric wire W of the seal hole 31 is inserted, each inner peripheral lip 32 is in close contact with the outer peripheral surface of the electric wire W over the entire circumference. Thereby, the some electric wire W is arrange | positioned in the sealing hole 31 in the sealing state.

  A plurality of outer peripheral lips 33 are provided on the outer surface of the collective rubber plug 30 side by side in the front-rear direction. When the collective rubber plug 30 is housed inside the rubber plug mounting portion 26, each outer peripheral lip 33 is in close contact with the inner wall of the rubber plug mounting portion 26 over the entire circumference. This prevents water from entering the inside of the housing 20 from the rubber plug mounting portion 26 and keeps the inside of the housing 20 in a sealed state.

  As shown in FIGS. 1 and 2, the rear holder 50 has a plurality of insertion holes 51 through which a plurality of electric wires W are inserted. The insertion hole 51 is larger than the terminal 61 and has an inner diameter slightly larger than the outer diameter of the electric wire W. For this reason, when the terminal-attached electric wire 60 is passed through the insertion hole 51 from behind, the inner wall of the insertion hole 51 suppresses the fluctuation of the electric wire W. The rear holder 50 is mounted between the pair of guide walls 27 and is movable in the front-rear direction between the entry position shown in FIG. 4 and the retracted position shown in FIG.

  As shown in FIGS. 6 and 7, the rear holder 50 is provided in a cylindrical shape along the plurality of insertion holes 51 from the main body 52 attached to the pair of guide walls 27 and the front end surface 54 of the main body 52. And a plurality of cylindrical portions 53. As shown in FIGS. 4 and 5, a pair of upper and lower finger hooks 57 are provided on the rear end portions of the upper and lower surfaces of the main body 52. These finger hooks 57 are positioned in the upper and lower slits 27C and 27D so that fingers can be hooked from the outside.

  Further, as shown in FIGS. 6 and 7, a pair of locking ribs 55 are provided on both side surfaces of the main body portion 52. As shown in FIG. 6, the rear holder 50 is held at the entry position by the locking ribs 55 being fitted and locked in the temporary locking holes 27 </ b> A. Further, as shown in FIG. 7, the rear holder 50 is held at the retracted position by the locking ribs 55 being fitted and locked in the main locking holes 27 </ b> B.

  As shown in FIGS. 4 and 6, when the rear holder 50 is pushed forward from the retracted position to the entry position, the front end surface 54 of the main body 52 comes into contact with the rubber plug holder 40 from the rear, so that the rear holder 50 is moved forward. It has come to be stopped. At the entry position, the cylindrical portion 53 enters between the outer peripheral surface of the electric wire W and the inner peripheral surface of the seal hole 31, and the front end of the cylindrical portion 53 passes through the mounting hole 42 and the seal hole 31 and the batch rubber plug 30. Located at the front edge. For this reason, the diameter of the seal hole 31 is increased by the cylindrical portion 53, and each inner peripheral lip 32 is held at a position where it does not contact the terminal 61 and the outer peripheral surface of the electric wire W as shown in FIG. 4. For this reason, each inner peripheral lip 32 is not damaged by the front end corner of the terminal 61, the stabilizer, or the like.

  Further, the inner diameter of the insertion hole 51 of the rear holder 50 is substantially the same as the inner diameter of the cavity of the terminal accommodating portion 22, and the cavity of the terminal accommodating portion 22 and the insertion hole 51 of the rear holder 50 are connected in a straight line at the entry position. It is like that. That is, it can be said that a continuous insertion path for inserting the terminal 61 is constituted by the cavity of the terminal accommodating portion 22 and the insertion hole 51 of the rear holder 50 at the entry position.

  On the other hand, in the retracted position shown in FIG. 7, the cylindrical portion 53 is retracted to the rear of the seal hole 31, and the front end of the cylindrical portion 53 penetrates the mounting hole 42 and partially enters the seal hole 31. The position does not contact the lip 32. For this reason, each inner peripheral lip 32 is restored and brought into close contact with the outer peripheral surface of the electric wire W as shown in FIG.

  Further, in the retracted position, the rear holder 50 protrudes rearward from the rear end of the rubber plug holder 40. For this reason, the distance from the rear-end opening edge part 56 of the insertion hole 51 in the main body part 52 to the seal hole 31 is substantially equal to the entire length of the rear holder 50, and a sufficient length to suppress the deflection of the electric wire W is ensured. can do. Here, the overall length of the cylindrical rubber plug 30 is substantially equal to the overall length of the batch rubber plug 30, and the cylindrical portion 53 and the main body portion 52 are arranged behind the batch rubber plug 30 at the retracted position. The deflection of the electric wire W can be suppressed with the above length. Therefore, when the electric wire W is swung while the rear holder 50 is in the retracted position, the wobbling of the electric wire W is not transmitted to the inner peripheral lip 32 of the seal hole 31, and sealing performance can be ensured. 7, since the rear end of the main body 52 is aligned with the rear end of the guide wall 27 in the front-rear direction, the rear holder 50 is protected by the pair of guide walls 27 in the retracted position. Can do.

  The present embodiment is configured as described above, and its operation will be described subsequently. As shown in FIG. 3, after the batch rubber plug 30 is mounted on the rubber plug mounting portion 26, the rubber plug holder 40 is mounted on the rubber plug mounting portion 26, thereby preventing the batch rubber plug 30 from coming off. Next, the rear holder 50 is inserted between the pair of guide walls 27 from the rear, and the cylindrical portion 53 is inserted into the seal hole 31. Then, the insertion of the rear holder 50 is stopped by the front end surface 54 of the main body 52 coming into contact with the rubber plug holder 40 from the rear, and each locking rib 55 is fitted into each temporary locking hole 27A and locked. Thus, the rear holder 50 is held at the entry position.

  Next, as shown in FIG. 4, the terminal-attached electric wire 60 is inserted into the cavity of the terminal accommodating portion 22 from the insertion hole 51. After all the terminals 61 reach the proper mounting position and are held by the lance 22A, the rear holder 50 is moved rearward. When the rear holder 50 reaches the retracted position, the locking ribs 55 are fitted into the respective locking holes 27B and locked, whereby the rear holder 50 is held at the retracted position. In the retracted position, as shown in FIG. 5, each inner peripheral lip 32 of the collective rubber plug 30 is in close contact with the outer peripheral surface of the electric wire W to seal the inside of the terminal accommodating portion 22, and the electric wire drawn backward from the seal hole 31. W is in a state of being arranged in the insertion hole 51. In this state, the swing of the electric wire W is suppressed by the rear holder 50, and the sealing performance by the collective rubber plug 30 is ensured.

  As described above, in the present embodiment, the electric wire shake suppressing member (rear holder 50) can suppress the shake of the electric wire W in the seal hole 31 of the collective rubber plug 30. That is, the rear end of the wire shake suppression member protrudes rearward from the rear end of the rubber plug holder 40, and the distance from the rear end of the wire shake suppression member to the seal hole 31 is sufficiently long. Even if the electric wire W sways behind the sway suppressor, the sway of the wire W is not transmitted to the seal hole 31 and the sealing performance is not deteriorated.

The wire deflection suppressing member includes a main body portion 52 attached to the guide portion (the pair of guide walls 27) and a plurality of tubes provided in a cylindrical shape along the plurality of insertion holes 51 from the front end surface 54 of the main body portion 52. It is good also as a structure which is provided with the part 53, and is a front stop surface by the front-end surface 54 of the main-body part 52 contacting the rubber plug holder 40 from back in the approach position.
According to such a configuration, since the front end surface 54 of the main body portion 52 comes into contact with the rubber plug holder 40 from behind, the wire vibration suppression member is stopped in front, so when mounting the wire vibration suppression member on the guide portion, It can be positioned at the entry position.

In the entry position, the front end of the cylindrical portion 53 passes through the seal hole 31 and is positioned at the front end of the collective rubber plug 30 so that the diameter of the seal hole 31 is increased and the collective rubber plug 30 does not contact the outer peripheral surface of the electric wire W. It is good.
According to such a configuration, it is possible to prevent the collective rubber plug 30 from being damaged by the tip of the terminal 61 when the electric wire 60 with a terminal is inserted into the seal hole 31 from the rear.

In the retracted position, the front end of the cylindrical portion 53 may be positioned at the rear end of the collective rubber plug 30 so that the inner peripheral surface of the seal hole 31 is in close contact with the outer peripheral surface of the electric wire W.
According to such a configuration, after the electric wire W is inserted into the seal hole 31, the inner surface of the seal hole 31 is brought into close contact with the outer peripheral surface of the electric wire W by moving the electric wire shake suppression member from the entry position to the retracted position. And the sealing performance can be exhibited.

In the retracted position, the rear end of the main body portion 52 may be aligned with the rear end of the guide portion in the front-rear direction.
According to such a configuration, the wire shake suppressing member can be protected by the guide portion at the retracted position.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) In the above embodiment, the front end surface 54 of the main body 52 is brought into contact with the rubber plug holder 40 to stop the rubber plug holder 40, but the finger hook portion 57 is formed at the front end of the slits 27C and 27D. You may make it perform the front stop of the rubber stopper holder 40 by making it contact | abut.

  (2) In the above embodiment, all the inner peripheral lips 32 are not in contact with the outer peripheral surface of the electric wire W by the cylindrical portion 53 when in the entry position, but some inner peripheral lips 32 are in contact with the outer peripheral surface of the electric wire W. May be.

  (3) Although all the inner peripheral lips 32 are in close contact with the outer peripheral surface of the electric wire W when in the retracted position in the above embodiment, some inner peripheral lips 32 may be in close contact with the outer peripheral surface of the electric wire W. Good.

  (4) Although the rear end of the main body 52 is aligned with the rear end of the guide wall 27 when in the retracted position in the above embodiment, the rear end of the main body 52 is more than the rear end of the guide wall 27. You may arrange ahead.

10 ... Waterproof connector 26 ... Rubber stopper mounting part 27 ... Guide wall (guide part)
30 ... Batch rubber stopper 31 ... Seal hole 40 ... Rubber stopper holder 50 ... Rear holder (electric wire runout restraining member)
51 ... Insertion hole 52 ... Body part 53 ... Tube part 54 ... Front end surface W ... Electric wire

Claims (5)

A batch rubber stopper having a plurality of sealing holes in which a plurality of electric wires are arranged in a sealed state;
A rubber plug mounting portion to which the batch rubber plug is mounted;
A rubber plug holder that has a mounting hole formed at a position corresponding to the seal hole and prevents the batch rubber plug from being detached by being mounted on the rubber plug mounting portion from the rear of the batch rubber plug;
A guide portion provided to protrude rearward from the rear end of the rubber plug mounting portion;
A wire runout restraining member mounted on the guide portion and provided with a plurality of insertion holes through which the plurality of wires are inserted in the front-rear direction;
The wire deflection suppressing member is movable between an entry position entering between an outer peripheral surface of the electric wire and an inner peripheral surface of the seal hole and a retract position retracted to the rear of the seal hole. In the position, the front end of the wire vibration suppression member passes through the mounting hole of the rubber plug holder, and the rear end of the wire vibration suppression member protrudes rearward from the rear end of the rubber plug holder. Waterproof connector.   The wire shake suppressing member includes a main body portion mounted on the guide portion, and a plurality of cylindrical portions provided in a cylindrical shape along the plurality of insertion holes respectively from the front end surface of the main body portion. 2. The waterproof connector according to claim 1, wherein, at the entry position, the electric wire shake suppression member is stopped in front when the front end surface of the main body abuts against the rubber plug holder from behind.   In the entry position, the front end of the cylindrical portion passes through the seal hole and is positioned at the front end of the collective rubber plug so that the seal hole is expanded in diameter so that the collective rubber plug does not contact the outer peripheral surface of the electric wire. The waterproof connector according to claim 2.   The inner peripheral surface of the said seal hole is closely_contact | adhered to the outer peripheral surface of the said electric wire because the front end of the said cylinder part is located in the rear end of the said batch rubber stopper in the said retracted position. Waterproof connector.   The waterproof connector according to any one of claims 2 to 4, wherein a rear end of the main body portion is aligned with a rear end of the guide portion in the front-rear direction at the retracted position.

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