JP2015015138A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof connector capable of easily performing fitting work of a seal member.SOLUTION: A waterproof connector includes: a connector housing 10; and a seal member 40 fitted to this connector housing 10. In the seal member 40, there is provided an engaging piece 43 which is inserted into a through-hole 17 provided in the connector housing 10 to be engaged therewith. The engaging piece 43 has a shaft part 43A protruding to the insertion direction into the through-hole 17, and a claw part 43B which protrudes sideways from the shaft part 43A to be engaged with the through-hole 17. On the side opposite to the protruding side of the claw part 43B than the engaging piece 43, a relief part S is provided which allows the shaft part 43A to be elastically deformed to the side opposite to the protruding side of the claw part 43B when the engaging piece 43 is inserted into the through-hole 17.

Description

  The present invention relates to a waterproof connector.

  Conventionally, as a waterproof connector, a connector housing in which an annular seal member is mounted is known (for example, Patent Document 1 below). The seal member includes a locking piece that is inserted into a through hole provided in the connector housing and locked. The locking piece has a head that protrudes in a direction intersecting the insertion direction of the through hole, and locks around the through hole by elastically returning through the through hole while the head is being crushed. As a result, the seal member is held in a state of being attached to the connector housing.

JP 2004-327169 A

  However, in the configuration as described above, when inserting the locking piece into the through hole, the head must be crushed, so the insertion resistance is large, and in some cases, a dedicated jig for pushing the locking piece is required. There is a problem that it takes time and effort to mount the seal member.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a waterproof connector capable of easily performing a mounting operation of a seal member.

The waterproof connector of the present invention has a connector housing and a seal member attached to the connector housing, and the locking member is inserted into a through hole provided in the connector housing and locked. And the locking piece has a shaft portion that protrudes in the insertion direction into the through hole, and a claw portion that protrudes laterally from the shaft portion and locks into the through hole. When the locking piece is inserted into the through hole, the shaft portion is elastically deformed to the side opposite to the protruding side of the claw when the locking piece is inserted into the through hole. An allowable escape portion is provided.
According to such a configuration, the insertion resistance when the locking piece is inserted into the through hole can be reduced, so that the mounting operation of the seal member can be easily performed.

  And an outer housing that is assembled to the connector housing after the seal member is mounted on the connector housing, and the outer housing is positioned on a track on which the locking piece is elastically deformed toward the relief portion. It is also possible to include a deformation limiting portion that limits elastic deformation of the locking piece toward the escape portion.

According to such a configuration, by assembling the outer housing to the connector housing, it is possible to limit elastic deformation of the locking piece toward the relief portion, that is, elastic deformation in the locking release direction. A sufficient holding force of the seal member can be ensured.
The deformation limiting portion may be a protrusion that enters the escape portion. According to such a configuration, an increase in size of the waterproof connector can be prevented.

  Moreover, the said deformation | transformation restriction | limiting part is good also as what contact | abuts to the said locking piece, without crushing the said locking piece. Here, when the deformation limiting portion crushes the locking piece, the assembly workability may be deteriorated due to the elastic force from the locking piece when the outer housing is assembled to the connector housing. However, since the deformation limiting portion comes into contact with the locking piece without crushing the locking piece, it is possible to prevent such deterioration in assembling workability.

  ADVANTAGE OF THE INVENTION According to this invention, the waterproof connector which can perform the mounting | wearing operation | work of a sealing member easily can be provided.

The exploded perspective view of the waterproof connector in this embodiment Cross section of waterproof connector Front view of connector housing It is sectional drawing of a connector housing, Comprising: Sectional drawing equivalent to the cross section in the AA position of FIG. Rear view of seal member Top view of seal member Side view of seal member FIG. 6 is a cross-sectional view of the seal member, corresponding to a cross-section at the BB position in FIG. 5. Front view of shield housing FIG. 10 is a cross-sectional view of the shield housing, corresponding to the cross-section at the CC position in FIG. 9. It is sectional drawing of a waterproof connector, Comprising: Sectional drawing showing the state before assembling a connector housing, a sealing member, and a shield housing A sectional view of a waterproof connector, showing a state before a shield housing is assembled to a connector housing to which a seal member is attached It is sectional drawing of a waterproof connector, Comprising: Sectional drawing showing the state after attaching a connector housing, a sealing member, and a shield housing Partially enlarged sectional view showing how the second locking piece is inserted into the through hole

<Embodiment>
Hereinafter, an embodiment embodying the present invention will be described in detail with reference to FIGS.
The waterproof connector C in this embodiment is a connector connected to a device such as a motor or an inverter, and is attached to a metal case (not shown) having a shield function in which the device is accommodated, and is connected to a connector on the device side. . Hereinafter, in each component, description will be made with the connection side (lower left side in FIG. 1) as the front, the opposite side as the rear, the upper side in FIG. 1 as the upper side, and the lower side as the lower side.

  The waterproof connector C includes a connector housing 10 that holds the terminal fittings 30 fixed to the terminals of a plurality of (in this embodiment, three) electric wires W, a seal member 40 that is attached to the connector housing 10, and the connector housing 10. And a shield housing (outer housing) 50 that is assembled after the seal member 40 is mounted.

  The connector housing 10 is made of a synthetic resin and includes a terminal accommodating portion 11 that can accommodate the terminal fitting 30. In the terminal accommodating portion 11, cavities 12 in which the terminal fittings 30 are individually accommodated are provided in a line in the width direction.

  The terminal fitting 30 is formed by punching a conductive metal plate and bending it, and a terminal connection portion 31 having a flat plate shape is formed at a front end portion thereof. The terminal connection portion 31 is formed with a connection hole 32 that is bolted to the connector on the device side, and a lance locking hole 33 that locks the lance 13 formed in each cavity 12 behind the terminal connection portion 31. It is formed through. The terminal fitting 30 accommodated in the terminal accommodating portion 11 is prevented from coming off from the cavity 12 when the lance 13 is engaged with the lance engagement hole 33.

  A rubber stopper 34 is accommodated at the rear end of each cavity 12. The rubber plug 34 is in close contact with the outer peripheral surface of each electric wire W and the inner peripheral surface of each cavity 12 to seal the space in a liquid-tight manner to prevent water from entering the cavity 12. The rubber plug 34 is prevented from coming off from the cavity 12 by a holder 35 attached to the rear end of the terminal accommodating portion 11. The holder 35 is fixed to the connector housing 10 by fitting the lock convex portion 36 provided in the holder 35 into the lock concave portion 14 provided in the connector housing 10.

  The connector housing 10 includes a flange portion 15 disposed along the outer surface of the case. The flange portion 15 is provided so as to protrude over the entire circumference at a substantially intermediate position in the front-rear direction of the terminal accommodating portion 11. The seal member 40 is attached to the flange portion 15.

  The seal member 40 attached to the connector housing 10 is made of rubber, and has a ring-shaped seal body 41 as shown in FIG. The seal body 41 has a horizontally long rectangular shape, and its long side (hereinafter referred to as the long side portion 41A) is approximately three times as long as the short side (hereinafter referred to as the short side portion 41B). .

  The seal body 41 has a substantially constant thickness over the entire circumference, and both the front surface and the rear surface are flat ends. When the waterproof connector C is attached to the case, the front surface and the rear surface of the seal main body portion 41 are pressed against the case and the flange portion 15 to be in close contact (surface contact). Thereby, the space between the connector housing 10 and the case is sealed in a liquid-tight manner to prevent water from entering the connecting portion between the waterproof connector C and the device-side connector.

  As shown in FIG. 5, a plurality of locking pieces for locking to the connector housing 10 are provided on the inner peripheral side and the outer peripheral side of the seal main body 41. Of these locking pieces, the locking piece provided on the inner peripheral side of the seal body 41 is referred to as a first locking piece 42, and the locking piece provided on the outer peripheral side is referred to as a second locking piece 43. Both the first locking piece 42 and the second locking piece 43 are formed integrally with the seal main body 41 in a straight line portion of the seal main body 41 (a portion excluding a curved corner).

  A total of six first locking pieces 42 are provided, one for each of the long sides 41A of the seal body 41 and one for each of the short sides 41B. The first locking piece 42 is thinner than the seal body 41, and a step is formed at the boundary between the first locking piece 42 and the seal body 41 (see FIG. 8).

  As shown in FIG. 5, the first locking piece 42 has a large locking piece 42 </ b> A having a horizontally long shape along the circumferential direction of the seal main body 41 and a width dimension smaller than that of the large locking piece 42 </ b> A (half A small locking piece 42B. The long side portion 41A is provided with a pair of large locking pieces 42A and small locking pieces 42B. The large locking piece 42A and the small locking piece 42B of the long side portion 41A are arranged at diagonal positions (positions facing the short side direction of the seal main body portion 41). A small locking piece 42B is provided on the short side portion 41B.

  Each first locking piece 42 is formed with a substantially circular hole 44 penetrating one by one so as to be locked to a press-fit protrusion 16 of the flange portion 15 described later. The hole 44 is a position at which the seal body 41 is substantially equally divided in the circumferential direction (the hole 44 of the first locking piece 42 provided at the long side 41A is a position at which the long side 41A is substantially divided into three. The hole 44 of the first locking piece 42 provided in the short side portion 41B is formed at the center position of the short side portion 41B.

  The hole 44 has a large diameter hole 44A having a large diameter and a small diameter hole 44B having a small diameter. A small-diameter hole 44B is formed in the small locking piece 42B provided in the long side 41A, and a large-diameter hole 44A is formed in the large locking piece 42A provided in the long side 41A. . In addition, a large-diameter hole portion 44A is formed in the small locking piece 42B provided in the short side portion 41B. The large-diameter hole portion 44A formed in the large locking piece 42A is located near the end in the longitudinal direction of the large locking piece 42A.

  Similarly to the first locking piece 42, the second locking pieces 43 are provided in a total of six, one pair on the long side portion 41 </ b> A and one on the short side portion 41 </ b> B. Each of the second locking pieces 43 is in the vicinity of the first locking piece 42, in other words, one first locking piece 42 and one second locking piece 43 sandwich the seal body 41. It is arranged in a position that makes one set inside and outside.

  The pair of second locking pieces 43 provided on the long side portion 41 </ b> A is provided so as to be shifted in the circumferential direction of the seal main body portion 41 from the first locking pieces 42 in the vicinity thereof, than the first locking pieces 42. The seal body 41 is located near the end in the longitudinal direction. In the second locking piece 43 and the first locking piece 42 provided on the long side portion 41A, a part of the portion excluding the hole 44 is continuous in a direction perpendicular to the long side portion 41A. The pair of second locking pieces 43 provided on the long side portion 41 </ b> A are formed symmetrically about the center of the seal body portion 41 in the long side direction.

  The second locking piece 43 provided on the short side portion 41B is positioned at the center of the short side portion 41B, and is perpendicular to the first locking piece 42 provided on the short side portion 41B and the short side portion 41B. It is lined up in the direction.

  All of the second locking pieces 43 have substantially the same shape. The second locking piece 43 is inserted into and locked in a through hole 17 of the flange portion 15 described later, and has a shaft portion 43A protruding in the insertion direction into the through hole 17 and laterally from the shaft portion 43A. It has a claw portion 43B that protrudes and engages with the through hole 17 (see FIGS. 6 and 7).

  As a whole, the shaft portion 43A is formed in a wall shape that is long in the circumferential direction of the seal main body 41, and protrudes laterally (outward in the radial direction) from the seal main body 41 and then bends rearward substantially vertically. Has been. The wall thickness dimension of the shaft portion 43 </ b> A is slightly smaller than the thickness dimension of the seal main body portion 41. Further, a portion of the shaft portion 43A that protrudes laterally from the seal main body portion 41 has a wall thickness dimension larger than that of a portion bent in the vertical direction.

  The claw portion 43B is provided at the tip of the shaft portion 43A. The claw portion 43B protrudes at a substantially right angle from the shaft portion 43A toward the side (outward in the radial direction of the seal main body portion 41). The width dimension of the claw part 43B (the dimension in the circumferential direction of the seal body part 41) is the same as the width dimension of the shaft part 43A.

  As shown in FIG. 12, the claw portion 43 </ b> B is formed with a locking surface 45 that locks the periphery of the through-hole 17 from the rear side. The locking surface 45 is substantially perpendicular to the outer surface of the shaft portion 43A. Further, on the rear surface of the claw portion 43B, as shown in FIG. 11, when the second locking piece 43 is inserted into the through hole 17, a guide surface for guiding the tip of the second locking piece 43 to the through hole 17 is provided. 46 is formed. In addition, the surface between the locking surface 45 and the guide surface 46 among the outer surfaces of the claw portion 43 </ b> B is a surface that is substantially parallel to the insertion direction with respect to the through hole 17.

  And in the 2nd locking piece 43, the relief inclined surface 47 for forming the escape part S mentioned later is formed (refer FIGS. 12-14). The relief inclined surface 47 is an inclined surface in a form in which a corner portion on the back surface side (the side opposite to the protruding side of the claw portion 43B) of the second locking piece 43 is scraped off. The relief inclined surface 47 is formed over the entire width direction of the second locking piece 43. The area of the escape inclined surface 47 is larger than the area of the guide surface 46, and the gradient of the escape inclined surface 47 and the gradient of the guide surface 46 are the same.

  When the second locking piece 43 is inserted into the through-hole 17 between the second locking piece 43 and the through-hole 17, the shaft portion 43A is on the back side (opposite to the protruding side of the claw portion 43B). A relief portion S that allows elastic deformation to the side) is formed (see FIG. 14). The escape portion S is a space formed between the inner peripheral surface of the through hole 17 and the second locking piece 43 inserted into the through hole 17. The escape portion S is set to a size such that the escape inclined surface 47 and the inner peripheral surface of the through hole 17 are in contact with each other without crushing the claw portion 43B in a state where the entire claw portion 43B enters the through hole 17. ing.

  Even in a state where the seal member 40 is locked to the connector housing 10 (a state where the insertion of the second locking piece 43 is completed), the lower end edge of the escape inclined surface 47 is substantially at the center in the axial direction of the through hole 17. An escape portion S is formed on the rear side in the insertion direction of the through hole 17.

  The flange portion 15 is provided with a mounting portion 18 to which the seal member 40 is mounted. As shown in FIG. 3, the mounting portion 18 has a substantially annular shape formed at the peripheral portion of the flange portion 15, and has a shape in which a wall is raised and recessed on the outer peripheral side and the inner peripheral side. The recess size of the mounting portion 18 is such that the front surface of the seal member 40 projects forward from the front surface of the flange portion 15 when the seal member 40 is mounted (see FIG. 2).

  The mounting portion 18 is provided with a locking piece fitting portion 19 in which the first locking piece 42 of the seal member 40 is fitted and locked. The locking piece fitting portion 19 is provided at a position corresponding to the first locking piece 42 and has a shape along the outer shape of the first locking piece 42. The locking piece fitting portion 19 includes a large fitting portion 19A into which the large locking piece 42A of the first locking piece 42 is fitted, and a small fitting portion 19B into which the small locking piece 42B is fitted. ing.

  The locking piece fitting portion 19 is provided with a press-fitting protrusion 16 that is press-fitted into the hole 44 of the first locking piece 42. The press-fitting protrusion 16 protrudes from the flange portion 15 in a substantially cylindrical shape toward the front. The press-fit protrusion 16 includes a large-diameter protrusion 16A having a large diameter and a small-diameter protrusion 16B having a small diameter according to the diameter of the hole 44. The large-diameter protrusion 16A is press-fitted into the large-diameter hole 44A, and the small-diameter protrusion 16B is press-fitted into the small-diameter hole 44B.

  The mounting portion 18 is formed with a through hole 17 into which the second locking piece 43 of the seal member 40 is inserted and locked. The through holes 17 are provided at a total of six positions corresponding to the second locking pieces 43. The through-hole 17 has a horizontally long rectangular shape when viewed from the front, and a locked surface 21 on which the claw portion 43B is hooked is formed around the back end in the insertion direction (see FIG. 11).

  A guide surface 22 for guiding the second locking piece 43 is formed around the front end of the through hole 17 in the insertion direction (see FIG. 11). The guide surface 22 is an inclined surface that is inclined so that the opening width of the through hole 17 gradually decreases toward the front in the insertion direction of the through hole 17.

  Further, on the back side of the locked surface 21, a thinned portion 23 is formed leaving the guide surface 22 (see FIG. 3). Thereby, it is possible to prevent deformation such as sink marks on the locked surface 21 and to prevent a decrease in locking force.

  The shield housing 50 assembled to the connector housing 10 after the seal member 40 is mounted on the connector housing 10 is made of conductive metal, specifically, aluminum die-cast, and covers substantially the entire flange portion 15. One covering portion 51 and a second covering portion 52 that covers a portion of the terminal accommodating portion 11 on the rear side of the flange portion 15 are integrally provided.

  A flange housing portion 53 capable of housing the flange portion 15 of the connector housing 10 is formed in the first covering portion 51 of the shield housing 50 (see FIG. 9). The flange accommodating portion 53 has a shape that follows the outer shape of the flange portion 15.

  The shield housing 50 is provided with four fixing portions 54 that are fixed to the case (see FIG. 9). The fixing portion 54 is a bolt hole into which a metal bolt (not shown) for fixing the shield housing 50 to the case can be inserted. The shield housing 50 is fixed to the case so as to be conductive by inserting a bolt through each fixing portion 54 and tightening the bolt in the bolt hole of the case. In addition, the fixing | fixed part 54 is formed in the position (four corners of the 1st coating | coated part 51) aligned with the bolt hole of a case.

  The second covering portion 52 has a cylindrical shape that collectively covers the terminal accommodating portion 11. The outer periphery of the second covering portion 52 is covered with a terminal portion of a braided wire (not shown) that collectively covers the plurality of electric wires W drawn backward from the waterproof connector C. The caulking ring 55 is caulked and fixed to the outer periphery of the braided wire, and thereby the braided wire and the shield housing 50 are connected so as to be conductive.

  The shield housing 50 includes a deformation limiting portion 56 that limits elastic deformation of the second locking piece 43 toward the relief portion S side. As shown in FIG. 9, a total of six deformation limiting portions 56 are provided at positions corresponding to the through holes 17 of the connector housing 10. The deformation limiting portion 56 is a protrusion that enters the escape portion S when the shield housing 50 is assembled to the connector housing 10 (see FIG. 13). The deformation limiting portion 56 is located on a track on which the second locking piece 43 is elastically deformed toward the relief portion S side.

  The deformation limiting portions 56 are all substantially the same shape. The deformation limiting portion 56 has a wall shape having a width dimension equivalent to that of the second locking piece 43, and protrudes forward from the recessed surface (bottom surface) of the flange housing portion 53.

  A surface of the deformation limiting portion 56 that faces the escape inclined surface 47 is a contact surface 57 that contacts the escape inclined surface 47 (see FIGS. 12 and 13). The contact surface 57 is formed at the tip corner portion of the deformation limiting portion 56 and is an inclined surface that is inclined with the same gradient as the escape inclined surface 47.

Next, a procedure for assembling the waterproof connector C will be described.
First, the seal member 40 is attached to the connector housing 10.
The first locking piece 42 is fitted and locked to the locking piece fitting portion 19. The press-fitting protrusions 16 of the locking piece fitting portion 19 are press-fitted into the holes 44 of the first locking piece 42, respectively. At this time, the large-diameter hole 44A and the large-diameter protrusion 16A are fitted into the small-diameter hole 44B and the small-diameter protrusion 16B, respectively. Thereby, it can prevent attaching the front and back of the sealing member 40 accidentally (prevention of incorrect connection).

  Further, the second locking piece 43 is inserted into the through hole 17 and locked. When the second locking piece 43 is to be inserted into the through-hole 17, the guide surface 46 of the claw portion 43 </ b> B comes into contact with the guide surface 22 of the connector housing 10, and the guide surface 46 and the guide surface 22 are inclined, so that the second The claw portion 43 </ b> B of the locking piece 43 is guided to the through hole 17. When the second locking piece 43 is further pushed in, the claw portion 43B enters the through-hole 17, and as shown in FIG. 14, the shaft portion 43A is inclined to the back side and moves forward through the through-hole 17. Then, when the claw portion 43B passes through the through hole 17, the shaft portion 43A is elastically restored to the original posture, and the locking surface 45 of the claw portion 43B is locked to the locked surface 21 of the through hole 17 (FIG. 12).

Next, the shield housing 50 is assembled to the connector housing 10 to which the seal member 40 is attached.
When the shield housing 50 is attached to the connector housing 10 from the rear and assembled, as shown in FIG. 13, the deformation limiting portion 56 enters the relief portion S, and the entire abutment surface 57 comes into contact with the relief surface 47. And the deformation | transformation restriction | limiting part 56 contact | abuts to this 2nd locking piece 43, without crushing the 2nd locking piece 43, and is in the state which buried the relief part S formed behind the 2nd locking piece 43 Become. At this time, the deformation limiting portion 56 is in a separated state without contacting the flange portion 15 of the connector housing 10.
Thus, the assembly of the waterproof connector C is completed.

According to the present embodiment configured as described above, the following effects can be obtained.
The waterproof connector C of the present embodiment includes a connector housing 10 and a seal member 40 that is attached to the connector housing 10. The seal member 40 is inserted into a through hole 17 provided in the connector housing 10. A second locking piece 43 to be locked is provided. The second locking piece 43 is engaged with the shaft part 43A protruding in the insertion direction into the through-hole 17 and the shaft part 43A laterally protruding to the through-hole 17. When the second locking piece 43 is inserted into the through-hole 17 on the back side of the second locking piece 43 (on the side opposite to the protruding side of the claw part 43B). In addition, a relief portion S that allows the shaft portion 43A to elastically deform on the side opposite to the protruding side of the claw portion 43B is provided.

  As a result, the second locking piece 43 is inserted into the through-hole 17 in a posture in which the second locking piece 43 is tilted toward the escape portion S, so that it is not necessary to crush the locking piece as in the prior art. The insertion resistance at the time of inserting the piece 43 into the through hole 17 can be reduced, and thus the mounting operation of the seal member 40 can be easily performed. Such an effect is particularly effective in improving the mounting workability of the seal member 40 having a face seal structure that is generally used without oil.

  Further, the relief portion S is provided by forming a relief inclined surface 47 on the second locking piece 43. Here, for example, in the case where a part of the flange portion is scraped to form the relief portion, the thickness of the flange portion is generally increased to ensure a predetermined strength in the flange portion, etc. There is a risk of increasing the size of the connector housing. However, since the relief portion S is formed by forming the relief inclined surface 47 in the second locking piece 43, such an increase in size can be prevented.

  Further, the waterproof connector C includes a shield housing 50 that is assembled to the connector housing 10 after the seal member 40 is mounted on the connector housing 10, and the shield housing 50 has the second locking piece 43 on the relief portion S side. A deformation limiting portion 56 is provided that is positioned on the elastically deforming track and limits elastic deformation of the second locking piece 43 toward the relief portion S.

Thus, by assembling the shield housing 50 to the connector housing 10, the elastic deformation of the second locking piece 43 toward the relief portion S, that is, the elastic deformation in the locking release direction can be limited. The holding force of the seal member 40 with respect to 10 can be sufficiently secured.
Moreover, since the deformation | transformation restriction | limiting part 56 is a protrusion which enters into the escape part S, this can prevent the enlargement of the waterproof connector C.

  Further, the deformation limiting portion 56 contacts the second locking piece 43 without crushing the second locking piece 43. Here, in order to prevent elastic deformation of the second locking piece in the unlocking direction, it is desirable that there is no gap between the deformation limiting part and the second locking piece. If the stop piece is set to be crushed, the assembly workability may deteriorate due to the elastic force from the second engagement piece when the shield housing is assembled to the connector housing. May be crushed and deformed by the deformation limiting portion, and may come out of the through hole. However, since the deformation limiting portion 56 is in contact with the second locking piece 43 without crushing the second locking piece 43, it prevents such deterioration of assembly workability and unintentional locking release. High retention force can be ensured.

As described above, according to the present embodiment, the connector housing 10 and the seal member 40 attached to the connector housing 10 are provided. The seal member 40 has a through hole 17 provided in the connector housing 10. A second locking piece 43 inserted and locked is provided. The second locking piece 43 includes a shaft portion 43A protruding in the insertion direction into the through hole 17, and a side hole protruding from the shaft portion 43A. When the second locking piece 43 is inserted into the through-hole 17 on the side opposite to the protruding side of the claw part 43B from the second locking piece 43, An escape portion S that allows the shaft portion 43A to elastically deform on the side opposite to the protruding side of the claw portion 43B is provided.
Thereby, since the insertion resistance at the time of inserting the 2nd locking piece 43 in the through-hole 17 can be reduced, the mounting | wearing operation | work of the sealing member 40 can be performed easily.

<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 relief portion S is formed by forming the relief slope surface 47 in the second locking piece 43, but this is not limiting, and for example, the flange portion is provided so as to widen the through hole. It is good also as what forms a relief part by shaving.
(2) In the above embodiment, the deformation limiting portion 56 is a protrusion that enters the escape portion S. However, the deformation limiting portion is not limited to this, and the deformation limiting portion is on a track on which the second locking piece elastically deforms toward the escape portion. For example, the deformation limiting portion is positioned on the rear side (opposite side of the locking surface) of the claw portion of the second locking piece, as long as it is positioned and limited to elastic deformation toward the relief portion. Then, the claw portion may be pressed to restrict its lifting (deformation in which the locking surface 45 is separated from the locked surface 21).

  (3) In the above-described embodiment, the deformation limiting unit 56 is configured to contact the second locking piece 43 without crushing the second locking piece 43. It is good also as what crushes a 2nd locking piece. At this time, in order to prevent the second locking piece from being deformed by being pushed by the deformation limiting portion, for example, the tip of the claw portion of the second locking piece and the locked surface of the through hole In addition, it is also possible to improve the locking force by forming hook shapes that are hooked to each other.

C ... Waterproof connector S ... Relief part 10 ... Connector housing 17 ... Through-hole 40 ... Seal member 43 ... Second locking piece (locking piece)
43A ... Shaft 43B ... Claw 50 ... Shield housing (outer housing)
56 ... Deformation limiting part

Claims (4)

A connector housing, and a seal member attached to the connector housing;
The seal member is provided with a locking piece that is inserted into a through hole provided in the connector housing and locked.
The locking piece includes a shaft portion that protrudes in the insertion direction into the through hole, and a claw portion that protrudes laterally from the shaft portion and engages with the through hole.
When the locking piece is inserted into the through hole, the shaft portion is elastically deformed to the side opposite to the protruding side of the claw portion, on the opposite side of the locking piece from the protruding side of the claw portion. Waterproof connector provided with a relief part that allows it to be done. An outer housing assembled to the connector housing after the seal member is mounted on the connector housing;
The outer housing includes a deformation limiting portion that is positioned on a track on which the locking piece elastically deforms toward the relief portion and restricts elastic deformation of the locking piece toward the relief portion. Waterproof connector as described in. The waterproof connector according to claim 2, wherein the deformation limiting portion is a projection that enters the escape portion. The waterproof connector according to claim 2, wherein the deformation limiting portion contacts the locking piece without crushing the locking piece.

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