JP2014022062A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a seal ring from moving toward a circumferential direction.SOLUTION: A waterproof connector 10 fitted into and attached to a mounting hole 51 provided on a case 50, comprises: a housing 20 having a fitting part 21 fitted into the mounting hole 51; a mounting recess part 25 recessed throughout the circumferential direction on an outer peripheral surface of the fitting part 21; and an annular seal ring 60 mounted on the mounting recess part 25. A projection piece 62 protruding to a lateral side, is integrally provided on a side edge of the seal ring 60, and a notch 26 in which the projection piece 62 is fitted thereto, is recessed on the mounting recess part 25. An inner peripheral lip 63 is protrusively formed throughout the circumferential direction on an inner peripheral surface of the seal ring 60, and a holding rib 65 for stopping the rotation of the seal ring 60 by contacting with the mounting recess part 25, is provided on the inner peripheral surface except the inner peripheral lip 63.

Description

  The present invention relates to a waterproof connector provided with a seal ring.

  Conventionally, as a waterproof connector that is fitted and attached to an attachment hole provided in a mating member, for example, the one disclosed in Patent Document 1 below is known. This includes a housing having a fitting portion that fits into the mounting hole, and an annular seal ring that is attached to a holding groove formed on the outer peripheral surface of the fitting portion. The side edge of the seal ring is integrally provided with an anti-rotation portion that protrudes laterally, and a concave portion in which the anti-rotation portion is fitted is provided in the side wall of the mounting recess. In a state where the rotation preventing portion is fitted in the recess, the seal ring can be prevented from moving in the circumferential direction.

JP 2010-123329 A

  However, since the seal ring is made of rubber containing oil, for example, if the waterproof connector is picked up by gripping the seal ring with the thumb and index finger, the seal ring may slide in the circumferential direction with respect to the holding groove. is there. In this case, it is possible that the anti-rotation part is separated from the recess and the seal ring moves in the circumferential direction.

  The present invention has been completed based on the above circumstances, and an object thereof is to prevent the seal ring from moving in the circumferential direction.

  The present invention relates to a waterproof connector that is fitted and attached to a mounting hole provided in a counterpart member, and a housing having a fitting portion that fits into the mounting hole, and a circumferential direction on an outer peripheral surface of the fitting portion. A mounting recess recessed across and an annular seal ring to be mounted in the mounting recess, and a protruding piece projecting sideways is integrally provided on the side edge of the seal ring. The concave portion into which the projecting piece is fitted is recessed, and an inner peripheral lip is projected on the inner peripheral surface of the seal ring in the circumferential direction, and on the peripheral surface other than the inner peripheral lip on the inner peripheral surface, It has a feature in that it has a configuration in which a non-rotating projection is provided to prevent the seal ring from rotating by contacting the mounting recess.

  According to such a configuration, the inner peripheral lip is brought into close contact with the mounting recess to secure the sealing performance between the seal ring and the mounting recess, and the friction force is reduced by bringing the rotation preventing projection into contact with the mounting recess. It can be generated to prevent the seal ring from rotating. Therefore, the seal ring can be prevented from moving in the circumferential direction.

The following configuration is preferable as an embodiment of the present invention.
The anti-rotation protrusion may be formed in a rib shape, arranged so as to intersect with the inner peripheral lip, and provided in a plurality along the circumferential direction of the seal ring.
According to such a configuration, when the seal ring receives a force in the circumferential direction, it becomes easy to generate a frictional force against the force. Therefore, it is possible to firmly prevent the seal ring from moving in the circumferential direction.

The anti-rotation protrusion may be configured to have a dimension that does not exceed the height of the inner peripheral lip.
According to such a configuration, the seal ring can be prevented from being rotated by both the inner peripheral lip and the rotation preventing projection. Therefore, it is possible to more securely prevent the seal ring from moving in the circumferential direction than to prevent the seal ring from being rotated only by the rotation preventing projection.

  According to the present invention, it is possible to prevent the seal ring from moving in the circumferential direction.

The perspective view of the waterproof connector in Embodiment 1 Top view of waterproof connector Front view of waterproof connector Left side view of waterproof connector AA line sectional view in FIG. FIG. 4 is a cross-sectional view taken along the line BB in FIG. The perspective view of the seal ring in Embodiment 1 Front view of seal ring CC sectional view in FIG. DD line sectional view in FIG. Sectional drawing which expanded and showed a part of FIG. The perspective view of the seal ring in Embodiment 2 Front view of seal ring EE sectional view in FIG. FF sectional view in FIG. Sectional drawing which expanded and showed a part of FIG.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 6, the waterproof connector 10 according to the present embodiment is attached and fixed to a case 50 of a device (not shown) mounted on the vehicle. The waterproof connector 10 includes a housing 20 having a fitting portion 21 that fits into an attachment hole 51 formed so as to penetrate the case 50, and a plurality of males that are held inside the housing 20 and protrude toward the inside of the case 50. The terminal 30 and the housing 20 are configured to include a shield shell 40 that is bolted to the case 50 so as to cover a portion protruding from the mounting hole 51 to the outside of the case 50. In the following description, the fitting direction of the fitting portion 21 to the mounting hole 51 is the front-rear direction, and the side from which the male terminal 30 protrudes is the front side.

  The housing 20 is made of a synthetic resin, and has a plurality of cavities 22 that penetrate in the front-rear direction. A lance 23 that holds the male terminal 30 is formed on the front side of the inner wall of the cavity 22. A front half portion of the male terminal 30 is a tab-like connection portion 31, and a rear half portion of the male terminal 30 is a barrel portion 32 that is crimped to the core wire of the electric wire W. The electric wire W is drawn backward from the barrel portion 32, and an individual rubber plug 33 is fitted on the outer peripheral surface of the drawn portion. The rubber plug 33 is sandwiched between the outer peripheral surface of the electric wire W and the inner peripheral surface of the cavity 22, and prevents water from entering the inside from the rear of the cavity 22. Further, the rubber plug 33 is held inside the cavity 22 by a back retainer 34. Although not described in detail, the back retainer 34 is held inside the cavity 22 in a state in which the plurality of rubber stoppers 33 are collectively prevented.

  The shield shell 40 is formed by pressing a metal plate material such as iron or aluminum. The shield shell 40 includes a horizontally long tubular portion 41 that covers the rear portion of the housing 20 relative to the fitting portion 21, and an attachment portion 42 that projects from the front edge of the tubular portion 41 to the outer peripheral side. ing. A caulking ring 43 is attached to the outer periphery of the tubular portion 41. A braided wire (not shown) is arranged between the tubular portion 41 and the caulking ring 43, and the caulking ring 43 is caulked to connect the braided wire and the tubular portion 41 so as to be conductive. . This braided wire is configured to collectively cover a plurality of electric wires W.

  As shown in FIG. 3, a pair of left and right bolt insertion holes 44 are formed through the attachment portion 42. The shield shell 40 is fixed to the case 50 by inserting a bolt (not shown) through the bolt insertion hole 44 and tightening it into a bolt fixing hole (not shown) in which a female screw of the case 50 is screwed. . As shown in FIG. 5, the rear surface of the fitting portion 21 is locked from the rear by the front surface of the mounting portion 42, thereby preventing the housing 20 from moving rearward. Further, the plurality of holding projections 24 projecting from the upper and lower surfaces of the rear end of the housing 20 are locked from the front by the rear end of the tubular portion 41, thereby preventing the housing 20 from moving forward. That is, by fixing the shield shell 40 to the case 50, the housing 20 held by the shield shell 40 is also fixed to the case 50.

  On the outer peripheral surface 21 </ b> A of the fitting portion 21, a mounting recess 25 in which a rubber seal ring 60 containing oil is mounted is provided in the circumferential direction. As shown in FIG. 7, the seal ring 60 includes a seal main body 61 that constitutes a main portion thereof, and a plurality of projecting pieces 62 that protrude laterally from the side edge of the seal main body 61. The projecting piece 62 is formed integrally with the seal body 61. A plurality of inner peripheral lips 63 extending in the circumferential direction are formed on the inner peripheral surface of the seal body 61 side by side in the front-rear direction, and a plurality of outer peripheral lips extending in the circumferential direction are formed on the outer peripheral surface of the seal body 61. 64 are formed side by side in the front-rear direction. As shown in FIG. 6, when the fitting portion 21 is fitted into the mounting hole 51, the inner peripheral lip 63 is in close contact with the bottom surface of the mounting recess 25 and the outer peripheral lip 64 is the inner periphery of the mounting hole 51. Close contact with the entire surface. Thereby, it is possible to prevent water from entering the case 50 through the space between the inner peripheral surface of the mounting hole 51 and the outer peripheral surface of the fitting portion 21.

  By the way, as shown in FIG. 1, the fitting part 21 has a laterally long oval shape, and the seal ring 60 fitted into the fitting recess 25 of the fitting part 21 in accordance with this has a horizontally long shape. It is formed in an elliptical shape. For this reason, when the seal ring 60 is mounted in the mounting recess 25, it is necessary to make the mounting posture of the seal ring 60 with respect to the mounting recess 25 constant. Therefore, a plurality of notches 26 into which the plurality of protruding pieces 62 are fitted are formed in the mounting recess 25 of the fitting portion 21 by being cut out in the front-rear direction. The notch 26 is configured to open to the mounting recess 25 side and the outer peripheral surface 21 </ b> A side of the fitting portion 21, and the projecting piece 62 can be mounted to the notch 26.

  By inserting the plurality of projecting pieces 62 into the corresponding notches 26, the projecting pieces 62 are held in the notches 26, and the seal ring 60 is attached to the mounting recess 25 in the correct posture. At this time, the axis of the seal ring 60 is arranged extending in the front-rear direction.

  A pair of projecting pieces 62 are arranged side by side in the front-rear direction on both side edges of the seal body 61 at the same place in the circumferential direction of the seal ring 60. In other words, a pair of projecting pieces 62 arranged side by side in the front-rear direction is used as a set of projecting pieces 62, and this set of projecting pieces 62 is disposed at a plurality of locations in the circumferential direction of the seal body 61. In the embodiment, it is disposed at two locations on the upper surface side of the fitting portion 21, and is disposed at two locations on the lower surface side of the fitting portion 21. Therefore, four individual projecting pieces 62 are arranged on the upper surface side of the fitting portion 21, four are arranged on the lower surface side of the fitting portion 21, and eight in total.

  On the other hand, a pair of notches 26 are arranged opposite to each other in the front-rear direction with the mounting recess 25 sandwiched in the same place in the circumferential direction of the mounting recess 25. In other words, a pair of opposed notches 26 are defined as a set of notches 26, and the set of notches 26 are arranged at a plurality of locations in the circumferential direction of the mounting recess 25, and in this embodiment, the upper surface of the mounting recess 25 It is arranged at two places on the side, and is arranged at two places on the lower surface side of the mounting recess 25. Therefore, four individual notches 26 are arranged on the upper surface side of the fitting portion 21, four are arranged on the lower surface side of the fitting portion 21, and eight in total.

  As shown in FIGS. 7 to 10, the seal ring 60 of the present embodiment includes a plurality of holding ribs 65 formed in an arrangement orthogonal to the inner peripheral lip 63. These holding ribs 65 are in the form of ribs extending in the axial direction of the seal ring 60, and are formed all around along the circumferential direction. Further, as shown in FIG. 8, the interval between the pair of adjacent holding ribs 65 is such that the left side surface 60C and the right side surface 60D side (short side side) than the upper surface 60A and the lower surface 60B side (long side side) of the seal ring 60. Is said to be narrower. This is because when the waterproof connector 10 is picked up, the left and right side surfaces 60C and 60D of the seal ring 60 are easy to pick with the thumb and index finger placed on the right and left side surfaces 60C and 60D, and the left and right side surfaces 60C and 60D receive the most circumferential force. This is because it is considered easy. Therefore, the seal ring 60 can be prevented from rotating efficiently by making the holding ribs 65 arranged on the left and right side surfaces 60C and 60D dense.

  Further, the protruding end 65A of the holding rib 65 is positioned lower than the protruding end 63A of the inner peripheral lip 63 as shown in FIG. In a state where the seal ring 60 is mounted in the mounting recess 25, the inner peripheral lip 63 is in contact with the peripheral surface of the mounting recess 25, but is not crushed. When the fitting part 21 of the housing 20 is fitted into the mounting hole 51 formed in the case 50 after the seal ring 60 is fitted in the fitting recess 25, the inner peripheral lip 63 is preferentially crushed. . Even when the inner peripheral lip 63 and the holding rib 65 are both crushed, the crushed amount of the inner lip 63 is larger than the crushed amount of the holding rib 65. Therefore, the seal ring 60 can be prevented from rotating by the holding rib 65 in a state where the adhesion between the inner peripheral lip 63 and the mounting recess 25 is ensured. Further, since the inner peripheral lip 63 and the outer peripheral lip 64 are crushed in a substantially natural state, the amount of crushing of the outer lip 64 is not increased by providing the holding rib 65, and the fitting portion 21 of the housing 20 is connected to the case 50. The frictional resistance generated between the outer peripheral lip 64 and the inner peripheral wall of the mounting hole 51 is not increased when the mounting hole 51 is formed in the mounting hole 51. Therefore, the fitting force when fitting the fitting portion 21 into the mounting hole 51 is not increased.

  The present embodiment is configured as described above, and its operation and effects will be described subsequently. In order to mount the seal ring 60 in the mounting recess 25, first, the seal ring 60 is aligned in a normal mounting posture so that each projecting piece 62 is aligned with the corresponding notch 26 in the front-rear direction. Next, the seal ring 60 is properly mounted in the mounting recess 25 by being fitted into each notch 26 of each projecting piece 62. In this state, when the waterproof connector 10 is picked up by gripping the seal ring 60 with a finger, the holding rib 65 is brought into close contact with the mounting recess 25 and a frictional force is generated between them, so that the seal ring 60 is in the circumferential direction. Can be prevented from moving to.

  On the inner peripheral surface of the seal ring 60, grid-like ribs are formed on the entire surface by the inner peripheral lip 63 and the holding rib 65. Therefore, when the seal ring 60 receives a force in the circumferential direction, The rib 65 does not fall in the circumferential direction, and the rigidity of each holding rib 65 is held high, so that the seal ring 60 can be firmly prevented from rotating. Further, since the protruding end 65A of the holding rib 65 is positioned lower than the protruding end 63A of the inner peripheral lip 63, the inner peripheral lip 63 can be freely bent in a region higher than the protruding end 65A of the holding rib 65. Deformation is guaranteed. Therefore, it is possible to prevent the seal ring 60 from rotating while securing the inherent performance of the seal ring 60 called the seal performance.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to the drawings of FIGS. The seal ring 70 of the present embodiment is obtained by changing the height of the holding rib 65 of the seal ring 60 of the first embodiment, and the other configuration is the same as that of the first embodiment.

  The seal ring 70 of the present embodiment includes a seal main body 71 that constitutes a main part thereof, and a plurality of projecting pieces 72 that protrude laterally from the side edge of the seal main body 71. The projecting piece 72 is formed integrally with the seal body 71. A plurality of inner peripheral lips 73 extending in the circumferential direction are formed on the inner peripheral surface of the seal body 71 side by side in the front-rear direction, and a plurality of outer peripheral lips extending in the circumferential direction are formed on the outer peripheral surface of the seal body 71. 74 are formed side by side in the front-rear direction. Further, the seal ring 70 includes a plurality of holding ribs 75 formed in an arrangement orthogonal to the inner peripheral lip 73. These holding ribs 75 are formed in a rib shape extending in the axial direction of the seal ring 70 and are formed on the entire circumference side by side in the circumferential direction.

  As shown in FIG. 13, the spacing between the pair of adjacent holding ribs 75 is greater on the left side 70C and right side 70D side (short side) than on the upper surface 70A and lower side 70B side (long side) of the seal ring 70. It is said to be narrow. This is because when the waterproof connector 10 is picked up, the left and right side surfaces 70C and 70D of the seal ring 70 are easy to pick with the thumb and index finger placed on the right and left side surfaces 70C and 70D, and the left and right side surfaces 70C and 70D receive the most circumferential force. This is because it is considered easy. Therefore, the seal ring 70 can be efficiently prevented from rotating by making the holding ribs 75 arranged on the left and right side surfaces 70C and 70D dense.

  Now, as shown in FIG. 16, the protruding end 75 </ b> A of the holding rib 75 of the present embodiment is formed at the same height as the protruding end 73 </ b> A of the inner peripheral lip 73. In this case, the inner ring lip 73 and the holding rib 75 are simultaneously crushed when the seal ring 70 mounted in the mounting recess 25 is picked so as to be sandwiched between the left and right sides with the thumb and forefinger. The rotation prevention of the ring 70 can be performed. Furthermore, since the crushing amount of the holding rib 75 can be made larger than that in the first embodiment, the seal ring 70 can be firmly prevented from rotating, and when the seal ring 70 is mounted in the mounting recess 25, the rotation of the seal ring 70 is prevented. Can be performed at any time.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the holding ribs 65 and 75 are illustrated as the non-rotating projections. However, according to the present invention, for example, a plurality of cylindrical projections between a pair of adjacent inner peripheral lips. May be arranged in the circumferential direction.
(2) In the first embodiment, when the fitting portion 21 of the housing 20 is fitted into the attachment hole 51 formed in the case 50, the holding rib 65 is also crushed. The height of the holding ribs may be set so that the holding ribs are not crushed even when the joint portion 21 is fitted in the mounting hole 51. If it does in this way, the fitting force at the time of fitting the fitting part 21 in the attachment hole 51 can be reduced. In addition, when the holding rib 75 and the inner peripheral lip 73 are formed at the same height as in the second embodiment, when the fitting portion 21 is fitted into the mounting hole 51, the inner circumferential surface of the mounting hole 51 Since the force to be received is distributed at two locations of the holding rib 75 and the inner peripheral lip 73, the amount of crushing is smaller than that of the inner peripheral lip 63 of the first embodiment. On the other hand, when the sum of the crushing amount of the inner peripheral lip 73 and the crushing amount of the outer peripheral lip 74 is constant, the crushing amount of the outer peripheral lip 74 is increased by the amount that the inner peripheral lip 73 is reduced. As a result of an increase in the contact area between the lip 74 and the inner peripheral surface of the mounting hole 51 and an increase in frictional resistance between them, the fitting force when the fitting portion 21 is fitted into the mounting hole 51 is increased. . Therefore, according to the configuration of the first embodiment, the fitting portion 21 can be fitted into the mounting hole 51 with a smaller fitting force than the configuration of the second embodiment.

DESCRIPTION OF SYMBOLS 10 ... Waterproof connector 20 ... Housing 21 ... Fitting part 21A ... Outer peripheral surface 25 ... Mounting recessed part 26 ... Notch (recessed part)
50 ... Case (mating member)
51 ... Mounting hole 60, 70 ... Seal ring 61, 71 ... Seal body 62, 72 ... Projection piece 63, 73 ... Inner peripheral lip 64, 74 ... Outer peripheral lip 65, 75 ... Holding rib (rotation prevention projection)

Claims (3)

A waterproof connector fitted and attached to a mounting hole provided in a mating member,
A housing having a fitting portion that fits into the mounting hole;
A mounting recess recessed in the circumferential direction on the outer peripheral surface of the fitting portion;
An annular seal ring mounted in the mounting recess,
The side edge of the seal ring is integrally provided with a protruding piece projecting sideways, and the mounting recess is provided with a recess into which the protruding piece is fitted, and the inner peripheral surface of the seal ring. Further, an anti-rotation protrusion that protrudes an inner peripheral lip in the circumferential direction and prevents the seal ring from rotating by contacting the mounting recess on a peripheral surface other than the inner peripheral lip on the inner peripheral surface. Waterproof connector characterized by providing   2. The waterproof connector according to claim 1, wherein the anti-rotation protrusion has a rib shape, is disposed so as to intersect with the inner peripheral lip, and is provided in a plurality along the circumferential direction of the seal ring.   The waterproof connector according to claim 1, wherein the anti-rotation protrusion is formed with a size that does not exceed a height of the inner peripheral lip.

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