JP2014038796A - Connector - Google Patents

Abstract

An object of the present invention is to improve the assembling property of a seal member while avoiding an increase in the thickness of a housing.
A seal surface 33 to which a seal member 90 is attached is formed on the outer peripheral surface of the outer wall of the housing 10. The seal surface 33 is formed on the outer peripheral surface of the outer wall on the back side in the mounting direction of the seal member 90, and the outer surface of the outer wall on the front side in the mounting direction of the seal member 90 is sealed via a step 30. Concave surfaces 27, 28, and 29 that have fallen radially inward from the surface 33 are formed. On the concave surfaces 27, 28, and 29 of the housing 10, a plurality of expansion guide portions 32 are formed in the circumferential direction to fill the step 30 and expand the diameter so that the seal member 90 can be attached to the seal surface 33.
[Selection] Figure 2

Description

  The present invention relates to a connector.

  The connector disclosed in Patent Document 1 includes a block-shaped housing and an annular seal member that can be fitted onto the housing. The housing is formed with a plurality of cavities into which the terminal fittings can be inserted, and a sealing surface on which the sealing member can be attached is formed on the outer peripheral surface of the outer wall that defines the cavities. On the outer peripheral surface of the outer wall, a concave surface that is one step lower than the seal surface is formed through a step at a portion in front of the seal surface. When the housing is fitted to the mating housing, the seal member is elastically sandwiched between the two housings, and both the housings are liquid-tightly sealed via the seal member.

JP 2004-288852 A

  By the way, in the process of mounting the housing on the housing, the seal member passes over the concave surface and then climbs over the step to reach the seal surface. In this case, since the natural dimension of the sealing member is smaller than the outer diameter of the sealing surface, the sealing member is likely to be caught by a step, resulting in poor assembly. On the other hand, if the concave surface is thickened to form a thick part, and the outer surface of the thick part and the seal surface are made flush with each other without any step, the sticking of the seal member will be eliminated and the assembly will be completed. Can be improved. However, in this case, since the thickness of the housing is increased by the thick portion, there is a problem that the housing is prone to sink at the time of molding and the housing is easily plastically deformed.

  The present invention has been completed based on the above circumstances, and an object thereof is to improve the assembling property of the seal member while avoiding the increase in thickness of the housing.

  The connector of the present invention has a cavity into which a terminal fitting can be inserted, a housing in which a seal surface is formed on the outer peripheral surface of the outer wall that defines the cavity, and a fitting partner that is attached to the seal surface of the housing. An annular seal member that is held in close contact between the mating housing and the housing, and the seal surface is formed in a portion of the outer peripheral surface of the outer wall on the back side in the mounting direction of the seal member, A concave surface that has fallen radially inward from the seal surface through a step is formed in a portion of the outer peripheral surface of the outer wall on the front side in the mounting direction of the seal member, and at a plurality of circumferential positions on the concave surface Further, the present invention is characterized in that an expansion guiding portion is formed to fill the step and expand the diameter so that the seal member can be mounted on the seal surface.

  The seal member passes through the concave surface and the step in the process of mounting on the seal surface, but according to the present invention, an expansion guide portion is formed to fill the step in the concave surface, and the expansion guide is formed in the process of mounting on the seal member. Since the diameter of the sealing member is increased by the portion so that the sealing member can be attached to the sealing surface, the sealing member is smoothly attached to the sealing surface. In this case, since the expansion guide portions are formed at a plurality of locations in the circumferential direction on the concave surface, the entire concave surface is not given a thick shape, and sinking occurs in the housing or the housing deforms during molding. Is prevented.

It is a front view of the housing of the connector which concerns on Example 1 of this invention. It is a front view of the housing which mounted | wore with the sealing member. It is a rear view of a housing. It is a rear view of the housing with which the lever was hold | maintained in the stand-by position. It is a right view of the housing with which the lever was hold | maintained in the standby position. It is a left view of the housing with which the lever was hold | maintained at the stand-by position. It is a top view of the housing with which the lever was hold | maintained at the stand-by position. It is a top view of the housing with which the lever was hold | maintained at the initial position. It is a rear view of a lever. It is a side view of a sealing member.

Preferred embodiments of the present invention are shown below.
The said expansion guide part is made into the form extended over the substantially full length of the mounting direction of the said sealing member in the said concave surface. Thereby, since the diameter expansion operation | movement of a seal member is made from the assembly | attachment initial stage to a housing, the mounting | wearing operation | movement of a seal member is not interrupted on the way and an assembly property is improved more. In addition, since the concave surface is reinforced by the respective expansion guide portions, a predetermined strength can be ensured even if the housing is thin at the concave portion.

  The housing has a substantially square block shape having four corners, and the expansion guide part is not formed on the corner part of the concave surface of the housing at least on both sides sandwiching the corner part. It is formed on the side edge. The seal member mounted on the housing is pulled at the corner, but the expansion guide is not formed at the corner, so the seal member is not pulled excessively and the assembly resistance increases. Can be prevented. In addition, since the expansion guide portions are formed on the side edges on both sides of the corner portion, the seal member can be smoothly aligned with the shape of the corner portion.

<Example 1>
A first embodiment of the present invention will be described with reference to FIGS. The connector of this embodiment includes a housing 10, a lever 60, a seal member 90, and a terminal fitting 100. The housing 10 can be fitted into a mating housing (not shown).

  The terminal fitting 100 is made of a conductive metal and is connected to the terminal portion of the electric wire 200 as shown in FIG. At the front portion of the terminal fitting 100, a cylindrical connecting portion 110 is formed in which a tab of a mating terminal fitting (not shown) mounted on the mating housing is inserted and connected when the two housings are fitted.

  The housing 10 is made of synthetic resin, and as shown in FIG. 1, a block-shaped housing body 11 extending in the left-right direction (width direction), a tubular fitting tube portion 12 surrounding the housing body 11, It has the connection part 13 along the radial direction substantially connected with the fitting cylinder part 12 and the housing main body 11 at a rear-end part. A fitting space 14 into which the mating housing can enter is formed between the fitting cylinder portion 12 and the housing body 11 and in front of the connecting portion 13. A front member (not shown) is attached to the housing body 11 from the front.

  As shown in FIG. 1, a plurality of cavities 15 are formed in the housing body 11. In the case of the present embodiment, a large cavity portion 16 having a plurality of large cavities 15 is formed on the left side of the housing body 11 in the drawing, and a small cavity having a plurality of small cavities 15 is formed on the right side of the housing body 11 in the drawing. A portion 17 is formed.

  As shown in FIG. 1, the large cavity portion 16 has four cavities 15 arranged in alignment in the up, down, left, and right directions, and peripheral walls 18 that define the peripheries of the cavities 15, and between the inner surfaces of the peripheral walls 18, A cross-shaped slit 19 is formed in the front surface. On the lower surface of the inner wall of each cavity 15, a large lance 20 that can be bent is formed to protrude forward. Although not shown in the drawings, the same large terminal fitting as the terminal fitting 100 is inserted from the rear in each cavity 15, and the normally inserted terminal fitting is elastically retained and locked by the lance 20. It has become.

  As shown in FIG. 1, the small cavity portion 17 has a cavity 15 in which a large number of upper and lower three stages are aligned in the width direction, and a receiving wall 21 that partitions substantially the lower half of each cavity 15. ing. A substantially upper half of each cavity 15 is formed on the front member side, and as the front member is mounted on the housing body 11, the periphery of each cavity 15 is partitioned over the entire circumference. . Further, on the upper surface of the inner wall of each cavity 15, a lance 20 that can be bent is formed to protrude forward at a position facing the receiving wall 21. The small terminal fittings 100 are inserted into the cavities 15 from the rear, and the normally inserted terminal fittings 100 are elastically retained and locked by the lances 20.

  As shown in FIG. 1, there is a larger gap between each bottom cavity 15 and each middle cavity 15 than between each top cavity 15 and each middle cavity 15. Inside, a middle plate portion 22 having a horizontal plate shape is formed protruding forward. The middle plate portion 22 is disposed so as to face the lances 20 of the cavities 15 in the lowermost stage, and the excessive bending of these lances 20 can be restricted. Further, an upper plate portion 23 is formed at the upper end of the small cavity portion 17 so as to be substantially parallel to the middle plate portion 22 and opposed to the lances 20 of the cavities 15 at the uppermost stage so as to restrict excessive deflection of these lances 20. ing. Further, a side plate portion 24 is formed at the right end of the small cavity portion 17 with a slight gap from the receiving wall 21. The side plate portion 24 has a side plate main body 25 substantially along the height direction and a pair of bent portions 26 that are bent inward from both upper and lower ends of the side plate main body 25. As will be described later, when the seal member 90 is attached to the housing body 11, the two corners of the seal member 90 are brought into close contact with each other along the bent portions 26.

  In the case of the present embodiment, as shown in FIG. 1, the large cavity portion 16 and the small cavity portion 17 are disposed so as to be displaced in the height direction as a whole. Specifically, the small cavity portion 17 is arranged higher than the large cavity portion 16, and the front surface of the peripheral wall 18 of the large cavity portion 16 (the front side in the mounting direction of the seal member 90) is the upper surface of the small cavity portion 17. The first concave surface 27 is one step lower than the upper surface (a seal surface 33 described later) of the upper plate portion 23, and the front lower surface of the receiving wall 21 of the small cavity portion 17 is the lower surface (described later) of the peripheral wall 18 of the large cavity portion 16. The second concave surface 28 is one step lower than the sealing surface 33). Further, the front side surface of the peripheral wall 16 of the large cavity portion 16 is a third concave surface 29 that is continuous with the first concave surface 27 with the corner portion 31 interposed therebetween. The back ends (rear ends) of the first to third concave surfaces 27, 28, 29 are closed by a step 30 substantially along the radial direction.

  Further, as shown in FIG. 1, the first to third concave surfaces 27, 28, and 29 of the housing body 11 are formed with a plurality of expansion guide portions 32 protruding at intervals in the circumferential direction. Each expansion guide portion 32 plays a role of expanding the inner diameter of the seal member 90 to a size that can be attached to the seal surface 33 before the seal member 90 reaches the seal surface 33. In the case of the present embodiment, each expansion guiding portion 32 is formed in a rib shape extending in the front-rear direction from the front end of the housing main body 11 to the step 30, one at the substantially central portion in the width direction of the first concave surface 27, the second Three concave surfaces 28 are arranged at intervals in the width direction, and three concave surfaces 29 are arranged at intervals in the height direction. That is, the respective expansion guide portions 32 are not formed at the four corner portions 31 of the housing body 11, and are respectively formed on the first and third concave surfaces 27 and 29 located on both sides of the upper left corner portion 31. Is formed.

  As shown in FIG. 1, the height dimension (protrusion dimension) of each expansion guiding portion 32 is substantially the same as the depth dimension of the step 30, and the outer end of each expansion guiding portion 32 is connected to a seal surface 33 described later. It is almost flush and continuous. In addition, a curved portion 34 (details not shown) having an arcuate cross section is formed at the front end corner portion of each expansion guide portion 32. In the case of the present embodiment, each expansion guiding portion 32 is configured to be continuous at substantially the same height in the front-rear direction except for the curved surface portion 34. When the front member is mounted on the housing main body 11, the outer ends of the respective expansion guide portions 32 are disposed so as to be able to contact the inner surface of the peripheral wall of the front member, and thus the front member is rattled in the radial direction. Are now regulated.

  The outer peripheral surface of the rear end portion of the housing body 11 (the end portion on the back side in the mounting direction of the seal member 90) is a seal surface 33 to which the seal member 90 is fitted. As shown in FIG. 1, the sealing surface 33 is a continuous surface that circulates over the entire circumference including the lower surface of the peripheral wall 18 of the large cavity portion 16, the upper surface of the upper plate portion 23, and the outer surface of the side plate portion 24. It is disposed immediately before the connecting portion 13 and immediately after the step 30.

  The seal member 90 is made of rubber such as silicon rubber, and as shown in FIG. 2, the seal member 90 is a substantially square annular O-ring extending left and right. As shown in FIG. 10, on the outer peripheral surface of the seal member 90, two front and rear outer peripheral lips 91 are formed to circulate. On the other hand, the inner peripheral surface of the seal member 90 is a continuous surface in the circumferential direction that is substantially free of irregularities, and has a shape corresponding to the seal surface 33. The inner diameter of the seal member 90 is smaller than the outer diameter of the seal surface 33, so that the seal member 90 is elastically adhered to the seal surface 33 of the housing body 11. When the housing 10 is fitted into the mating housing, the seal member 90 is sandwiched between the two housings in a state in which each outer peripheral lip 91 is elastically compressed on the inner surface of the mating housing, whereby the two housings are liquid-tight. It is designed to be sealed.

  Here, the seal member 90 is mounted from the front with respect to the seal surface 33 of the housing body 11, and passes through the step 30 through the first to third concave surfaces 27, 28, and 29 in the mounting process. If the seal member 90 remains in a natural state when passing through the step 30, the seal member 90 may be caught on the step 30, which may make it difficult to mount the seal surface 33. However, in the case of the present embodiment, each expansion guide portion 32 is formed so as to fill the step 30, and the seal member 90 can be mounted on the seal surface 33 by sliding on the curved surface portion 34 of each expansion guide portion 32. Since the diameter is increased, the sealing member 90 is not caught on the step 30 and a smooth mounting operation on the sealing surface 33 is ensured. Moreover, the expansion guide part 32 is partially formed in the 1st-3rd concave surfaces 27, 28, 29, and the whole 1st-3rd concave surfaces 27, 28, 29 are not thickened. Therefore, it is possible to prevent the housing 10 from sinking or the housing 10 from being deformed during molding.

  Further, since each of the expansion guide portions 32 extends over substantially the entire length in the front-rear direction of the first to third concave surfaces 27, 28, 29, the diameter expansion operation of the seal member 90 is performed on the housing body 11. It is made from the beginning of assembly. As a result, the mounting operation of the seal member 90 is not interrupted and the assemblability is further improved. In addition, since the first to third concave surfaces 27, 28, 29 are reinforced by the respective expansion guide portions 32 having a rib shape, the housing body 11 is thinned at the first to third concave surfaces 27, 28, 29. Even if there is a circumstance, it is possible to ensure a predetermined strength.

  In addition, each expansion guide portion 32 is not formed in the four corner portions 31 but is formed in the first and third concave surfaces 27 and 29 which are side edges on both sides sandwiching the upper left corner portion 31. In the mounting process, the sealing member 90 is not excessively pulled by the corner portion 31, and the sealing member 90 is smoothly expanded so as to follow the shape of the corner portion 31 by the respective expansion guide portions 32 sandwiching the corner portion 31. Diameter.

Subsequently, each structure of the rear portion of the housing main body 11, the fitting cylinder portion 12, and the lever 60 will be described.
The rear surface of the housing body 11 is an electric wire drawing surface from which the electric wire 200 is drawn, and the large cavity portion 16 and the small cavity portion 17 are disposed adjacent to each other. As shown in FIG. 3, the large cavity portion 16 has four cylindrical portions 35 that are cylindrical on the rear surface of the housing body 11, and individual rubber plugs (not shown) that individually seal the electric wires 200 are in close contact with each other. Can be inserted. On the other hand, the small cavity portion 17 has a rectangular tube-shaped hood portion 36 on the rear surface of the housing body 11, and a terminal insertion in which the rear end of the cavity 15 is opened in the hood portion 36 and the terminal fitting 100 can be inserted therefrom. Part 37 is configured. A batch rubber plug (not shown) that seals the plurality of electric wires 200 at once can be inserted into the hood portion 36 in a close contact state, and a rear holder (not shown) that prevents the batch rubber plug from coming out can be inserted. In addition, each cylinder part 35 and the terminal insertion part 37 are made into the form which protrudes back from the rear surface of the housing main body 11. FIG. An electric wire cover (not shown) is attached to the rear end of the housing main body 11 from the rear side of a lever 60 described later, and the wiring direction of each electric wire 200 drawn from the rear surface of the housing main body 11 is defined by the electric wire cover. It has come to be.

  As shown in FIG. 3, the upper and lower walls of the fitting cylinder portion 12 are configured by an inner wall 38 and an expansion restriction wall 39 disposed outside the inner wall 38. Between the inner wall 38 and the expansion restriction wall 39, an accommodation space 40 that can accommodate both cam plates 62 (to be described later) of the lever 60 is formed to open rearward. A support shaft 43 is rotatably formed on the inner surface of the expansion restriction wall 39 so as to rotatably support the lever 60. Further, as shown in FIG. 1, an introduction port 41 facing the accommodation space 40 is formed at the front end of the inner wall 38, and a cam follower of a mating housing (not shown) can be introduced from the front through the introduction port 41. Yes.

  As shown in FIG. 7, a pair of lock portions 42 protrude from the outer surfaces of both the left and right walls of the fitting cylinder portion 12. Both lock portions 42 have a claw shape and can be locked to a lock arm 63 (described later) of the lever 60.

  The lever 60 is made of synthetic resin, and as shown in FIG. 9, has an operation portion 61 extending in the height direction and a pair of cam plates 62 protruding substantially in parallel from both ends of the operation portion 61 in the height direction. And it has a gate shape as a whole. As shown in FIG. 7, the lever 60 is mounted on the housing 10 so as to straddle the housing 10 from the rear in a state where both the cam plates 62 are accommodated in the accommodating space 40. It can be rotated to the fitting position. As shown in FIG. 8, in the initial position, the operation part 61 is arranged away from the rear of the housing 10, and as shown in FIG. 7, the operation part 61 is arranged in contact with the side surface of the housing 10 as shown in FIG. It has come to be. Further, when the terminal fitting 100 is inserted into the terminal insertion portion 37, the lever 60 is kept at the fitting position, that is, the fitting position is also a standby position when the terminal fitting 100 is inserted.

  As shown in FIG. 6, the operation portion 61 is formed with a lock arm 63 extending in the rotation direction of the lever 60. The lock arm 63 is disposed so as to be able to bend within a protective wall 64 surrounding the lock arm 63. As shown in FIGS. 6 and 7, when the lever 60 reaches the fitting position or the standby position, the lock arm 63 is elastically locked to the lock portion 42, whereby the lever 60 is brought into the fitting position or the standby position. It is supposed to be retained. In the case of the present embodiment, the rotation direction of the lever 60 can be selected in either a clockwise direction or a counterclockwise direction. For this reason, the lock portions 42 are arranged in pairs on the left and right side surfaces of the fitting cylinder portion 12, and the support shaft 43 is arranged at the center in the width direction of the housing 10.

  As shown in FIG. 8, both cam plates 62 include a constricted portion 65 located near the operation portion 61 and a cam main body portion 66 located away from the operation portion 61. The cam main body portion 66 is configured to expand in the front-rear direction from the constricted portion 65 and is inserted into the accommodating space 40 of the fitting cylinder portion 12. A shaft hole 67 that receives the support shaft 43 is formed through substantially the center of the cam main body 66. Further, a cam groove 68 having a bottom is formed on the inner surface of the cam main body 66 and extends in a predetermined direction and opens to the outer peripheral edge.

  Here, when the lever 60 is in the initial position, the entrance of the cam groove 68 faces forward through the introduction port 41, and the cam follower of the mating housing can be received. When the housing 60 is shallowly fitted to the mating housing and the cam follower is introduced at the entrance of the cam groove 68 and the lever 60 is rotated toward the fitting position while grasping the operation portion 61, the cam groove 68 The cam follower slides on the groove surface to exert a cam action between the lever 60 and the counterpart housing, and the housing 10 is fitted to the counterpart housing with a low fitting force. Thereafter, when the lever 60 reaches the mating position, the cam follower moves to the back side of the cam groove 68, and the lock arm 63 is engaged with the lock portion 42 so that both housings are held in the mating state. It has become.

  In the turning process of the lever 60, both the cam plates 62 try to expand outward due to the fitting resistance between the two housings. In this embodiment, as shown in FIG. Since the expansion restriction wall 39 exists at a position opposite to the expansion direction, the further expansion operation is restricted by the two cam plates 62 coming into contact with the expansion restriction wall 39. Therefore, the situation where both the cam plates 62 are excessively expanded and detached from the support shaft 43 is avoided.

  Further, the constricted portion 65 is always located behind the expansion restricting wall 39 and is exposed outside the accommodation space 40. As shown in FIG. 7, when the lever 60 is in the fitting position or the standby position, the front end of the constricted portion 65 is stopped against the rear end of the expansion restriction wall 39, and the lever 60 is further rotated forward. Are now regulated.

  On the other hand, the cam main body 66 is disposed across the inside and outside of the accommodation space 40. As shown in FIG. 8, when the lever 60 is in the initial position, the lever 60 rotates to the opposite side to the fitting position on the outer surface of the cam main body 66 exposed to the outside of the accommodation space 40. A rotation restricting portion 69 that restricts the protrusion is formed to protrude. The rotation restricting portion 69 is formed in a rib shape extending along the rear end of the expansion restriction wall 39 at the initial position, and restricts the rotation range of the lever 60 by contacting the rear end of the expansion restriction wall 39. To play a role.

  In addition, the rear end portion of the lever 60 is always disposed so as to protrude rearward from the rear ends (the rearmost end of the housing 10) of the tube portions 35 and the terminal insertion portions 37. Among these, as shown in FIG. 5, the rear end portions of both cam plates 62 are on both sides (both sides in the height direction) sandwiching each tube portion 35 and the terminal insertion portion 37 when the lever 60 is in the standby position. It is configured as a pair of protrusions 71 that are arranged to stand substantially parallel to each other in the vicinity position.

  As shown in FIG. 4, a pair of recesses 72 are formed on the inner surface of the both projecting portions 71 on the cam main body 66 side and located on both outer sides of the terminal insertion portion 37. Both concave portions 72 are open at the rear ends (including the arc-shaped outer peripheral edge) of both cam plates 62, and are disposed only in the portion corresponding to the terminal insertion portion 37. Have.

  Specifically, as shown in FIG. 7, the two recesses 72 have a first inner edge 73 extending along the width direction at substantially the same front-rear position as the rear end of the terminal insertion portion 37 when the lever 60 is in the standby position. And a second inner edge 74 that extends along the front-rear direction at substantially the same left and right position as the boundary portion between the terminal insertion portion 37 and each cylindrical portion 35, and is partitioned by an inner edge that is substantially L-shaped. As shown in FIG. 5, the first inner edges 73 of both recesses 72 are tapered inclined surfaces 74 that gradually incline forward (in the insertion direction of the terminal fitting 100) toward the terminal insertion portion 37 side. When the lever 60 is mounted on the housing body 11, the electric wire cover is guided to the proper mounting position by sliding on the slope 74.

  Further, as shown in FIG. 5, the rotation restricting portion 69 is disposed in the back-to-back portion on the opposite side facing the recess 72 in the outer surfaces of the cam body portions 66. For this reason, although the part corresponding to the recessed part 72 among both the cam main-body parts 66 becomes thin as a whole, in the part of the rotation control part 69, it becomes thick and the strength reduction is prevented.

  Now, as shown in FIGS. 4 and 5, the lever 60 is held at the standby position, and the terminal fitting 100 is inserted into the terminal insertion portion 37 in this state. In this case, since the projecting portions 71 of both cam plates 62 project rearward, fingers may interfere with both projecting portions 71 and the smooth insertion work of the terminal fitting 100 may be hindered. However, according to the present embodiment, the recesses 72 are formed on the inner surfaces of both the cam plates 62, and the work space 80 is widely secured between the both recesses 72, so that the insertion work of the terminal fitting 100 can be smoothly performed in the work space 80. Can be performed. As a result, the insertion workability of the terminal fitting 100 is improved. In addition, even if the cam plates 62 do not protrude outwardly, the work space 80 is secured widely, so that the lever 60 can be prevented from becoming large.

  Moreover, since the 1st inner edge 73 of the recessed part 72 is made into the slope 74, when performing the insertion operation | work of the terminal metal fitting 100, a fingertip can be made to follow the slope 74, and an insertion operation becomes easier. The slope 74 can also be used as a mounting guide surface for the electric wire cover.

  Further, since the rotation restricting portion 69 protrudes from the outer surface of both cam plates 62 opposite to the recess 72, the strength of the cam plates 62 is reduced at the recess 72 portion. Can be prevented.

  Furthermore, the concave portion 72 is formed only in the necessary minimum portion corresponding to the terminal insertion portion 37 on the inner surface of the cam main body portion 66 and is not formed in the cam main body portion 66 that is weak in strength. The strength reduction can be efficiently suppressed.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings, and may be, for example, as follows.
(1) The step and the concave surface may be formed over the entire circumference of the housing body.
(2) The expansion guide portion does not need to be formed over the entire length of the concave surface, and may be, for example, a sloped rib connected to a step on the back side of the concave surface.
(3) The expansion guide part may be formed only on the side edges on both sides of the corner part.
(4) The expansion guide part may be connected to the seal surface via a slight level difference.
(5) The housing main body may have a substantially circular cross section, and the seal member may have a substantially annular shape.
(6) There may be no fitting cylinder part and the lever may be supported on both side surfaces of the housing body.
(7) In addition to the terminal insertion portion, the concave portion may be formed on both outer sides of each cylindrical portion (large cavity portion).
(8) The slope of the recess may be curved.
(9) The inner surface of the recess may be a curved surface as a whole without being partitioned linearly by the inner edge.

DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... Housing main body 15 ... Cavity 27 ... 1st concave surface (concave surface)
28 ... Second concave surface (concave surface)
29 ... Third concave surface (concave surface)
DESCRIPTION OF SYMBOLS 30 ... Level difference 31 ... Corner | angular part 32 ... Expansion guide part 37 ... Terminal insertion part 39 ... Expansion restriction wall 60 ... Lever 61 ... Operation part 62 ... Cam board 69 ... Rotation restriction part 71 ... Protrusion part 72 ... Recessed part 74 ... Slope 90 ... Sealing member 100 ... Terminal fitting

Claims (3)

A housing having a cavity into which a terminal fitting can be inserted, and a seal surface formed on the outer peripheral surface of the outer wall defining the cavity;
An annular seal member mounted on the seal surface of the housing and held in close contact between the mating housing to be mated and the housing;
The seal surface is formed on a portion of the outer peripheral surface of the outer wall on the back side in the mounting direction of the seal member, and a portion of the outer peripheral surface of the outer wall on the front side in the mounting direction of the seal member is provided with a step through the step. Concave surfaces that fall radially inward from the seal surface are formed, and at a plurality of circumferential positions on the concave surface, the step is filled to expand the diameter of the seal member to a size that can be attached to the seal surface. A connector characterized in that an expansion guide part is formed.   The connector according to claim 1, wherein the expansion guide portion is configured to extend over substantially the entire length in the mounting direction of the seal member on the concave surface.   The housing has a substantially square block shape having four corners, and the expansion guide part is not formed on the corner part of the concave surface of the housing at least on both sides sandwiching the corner part. The connector according to claim 1, wherein the connector is formed on a side edge.

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