Connector

Abstract

To provide a connector capable of improving the visibility of a detection portion when detecting a fitting state.SOLUTION: A first connector 10 includes a first housing 12 that accommodates a first terminal fitting 11 and a seal member 16 attached to the first housing 12. A second connector 60 includes a second housing 62 that fits into the first housing 12. The seal member 16 includes a seal body 37 that is disposed between the first housing 12 and the second housing 62 in a fitted state, and a protrusion 46 that protrudes from the seal body 37 and faces the outside of the first housing 12. The second housing 62 includes a detection portion 74 that faces the protrusion 46 when fitted into the first housing 12 and is arranged so as to be visible from the outside. The detection portion 74 and the protrusion 46 are different colors.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to connectors. [Background technology]

[0002] The connector disclosed in Patent Document 1 includes a female housing and a male housing that can be mated with each other. The female housing has a main body and a hood that surrounds the main body. A rubber ring is attached to the main body. The male housing fits inside the hood. When the female housing and the male housing are mated, the rubber ring is attached to the male housing. It is disposed so as to be sandwiched between the peripheral wall and the main body portion.

[0003] A protruding piece is formed on the male housing. A through hole is formed in the hood portion so as to penetrate in the front-rear direction. When the female housing and the male housing are mated, the protruding piece is inserted into the through hole and is exposed at the rear of the hood portion. Other prior art documents include Patent Documents 2-5. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-41015 [Patent Document 2] Japanese Patent Application Publication No. 10-172647 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-267003 [Patent Document 4] Japanese Patent Application Laid-Open No. 2001-283972 [Patent Document 5] Japanese Patent Application Laid-Open No. 2015-220203 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 describes that proper mating of the female and male housings can be detected by visually confirming that the protruding piece protrudes rearward from the hood. When the protruding piece protrudes rearward from the hood, the main body of the female housing is located behind (in the background) the protruding piece. If the female and male housings are the same color, such as gray, the contrast between the protruding piece and the main body is small, making it difficult to visually confirm that the protruding piece protrudes rearward from the hood. In contrast, Patent Document 1 also uses a mechanical detection method in which a detection rod can be inserted into an insertion groove formed on the outer surface of the protruding piece to determine that the female and male housings are properly mated. However, the addition of the detection rod increases the number of parts, resulting in higher costs.

[0006] Therefore, an object of the present disclosure is to improve visibility when detecting the mated state of a connector without increasing the number of parts. [Means for solving the problem]

[0007] The connector of the present disclosure comprises a first connector and a second connector, the first connector comprising a first housing that accommodates a first terminal fitting and a sealing member attached to the first housing, the second connector having a second housing that fits into the first housing, the sealing member having a seal body that is arranged between the first housing and the second housing in a fitted state and a protrusion that protrudes from the seal body and faces the outside of the first housing, the second housing having a detection portion that overlaps the protrusion when fitted with the first housing and is arranged so as to be visible from the outside, the detection portion and the protrusion being different colors from each other. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a connector that improves visibility when detecting the mated state. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side cross-sectional view of a first connector and a second connector in a mated state in a connector according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the second connector of the connector of the first embodiment, seen obliquely from above and in front. [Figure 3] FIG. 3 is a front view of the second housing in the connector of the first embodiment. [Figure 4] FIG. 4 is a perspective view of the first connector of the connector of the first embodiment, seen obliquely from above and in front. [Figure 5] FIG. 5 is a rear view of the first housing in the connector of the first embodiment. [Figure 6] FIG. 6 is a perspective view of the seal member in the connector of the first embodiment, as viewed obliquely from below and behind. [Figure 7] FIG. 7 is a side view of the sealing member in the connector of the first embodiment. [Figure 8] FIG. 8 is a perspective view of the seal member in the connector of the first embodiment, as viewed obliquely from above and in front. [Figure 9] FIG. 9 is a front view of the first connector and the second connector in a mated state in the connector of the first embodiment. [Figure 10] FIG. 10 is a side cross-sectional view showing a state in which the detection unit is inserted into the through-hole of the sealing member in the connector of the first embodiment. [Figure 11] FIG. 11 is an enlarged cross-sectional view showing a state in which the detection unit is inserted into the through-hole of the sealing member in the connector of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The connector of the present disclosure comprises: (1) A connector includes a first connector and a second connector, the first connector including a first housing that accommodates first terminal fittings and a sealing member attached to the first housing, the second connector including a second housing that fits into the first housing, the sealing member including a seal body that is disposed between the first housing and the second housing in a fitted state and a protrusion that protrudes from the seal body and faces the outside of the first housing, the second housing including a detection portion that overlaps the protrusion when fitted with the first housing and is positioned so as to be visible from the outside, the detection portion and the protrusion being different colors from each other. By visually checking from the outside that the detection portion of the second housing overlaps with the protrusion of the seal member, it can be checked that the first housing and the second housing are properly fitted together. In particular, in the case of the configuration (1) above, the detection portion and the protrusion have different colors, which improves visibility (distinguishing ability) when visually checking the detection portion overlapping with the protrusion.

[0011] (2) In the connector described in (1) above, it is preferable that the detection portion faces and contacts the protrusion in a direction intersecting a fitting direction of the second housing relative to the first housing. According to the above configuration (2), it is possible to prevent liquid such as water from entering between the detection portion and the protruding portion, and it is possible to improve the sealing performance of the sealing member.

[0012] (3) In the connector described in (2) above, it is preferable that the protrusion protrudes from the seal body in the mating direction, and the detection portion is positioned so as to be visible from the mating direction when the first housing and the second housing are mated. According to the configuration (3) above, when detecting the mating state between the first housing and the second housing, the direction in which the detection unit is viewed can be specified as the mating direction, thereby preventing something that is not a detection unit from being mistaken for a detection unit and improving the reliability of detection.

[0013] (4) In the connector described in (3) above, it is preferable that the sealing member has a through hole that penetrates the protrusion in the mating direction, and the detection unit is positioned inside the through hole when the first housing and the second housing are mated. According to the configuration (4) above, during the process of mating the first housing and the second housing, air that may be compressed between the first housing and the second housing can be released through the through hole, thereby keeping mating resistance low.

[0014] [Details of the embodiments of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. However, the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0015] <Embodiment 1> As shown in Fig. 1, the connector of the first embodiment of the present disclosure includes a first connector 10 and a second connector 60. The first connector 10 has a first terminal fitting 11, a first housing 12, a retainer 13, a one-piece rubber plug 14, a holder 15, and a sealing member 16. The second connector 60 has a second terminal fitting 61 and a second housing 62. The first housing 12 and the second housing 62 are matable with each other. The first terminal fitting 11 and the second terminal fitting 61 are made of a conductive metal.

[0016] The first housing 12, retainer 13, holder 15, and second housing 62 are made of synthetic resin and are generally colored achromatically, such as black or gray. The one-piece rubber plug 14 and seal member 16 are made of rubber, such as silicone rubber, and are generally colored chromatically, such as red, orange, or brown. In the following description, the front-to-rear direction refers to the direction in which the second housing 62 is mated with the first housing 12. The up-down direction refers to the up-down direction in each drawing. The left-to-right direction refers to the left-to-right direction when viewed from the front. The symbols X, Y, and Z in each drawing represent the front, left, and up, respectively. These directional references do not necessarily coincide with the directional references when the connector is installed in a vehicle or the like (not shown).

[0017] (Second connector 60) As shown in FIG. 2, the second connector 60 is exemplified as a male connector and includes a plurality of male second terminal fittings 61 (only one is shown by a two-dot chain line in FIG. 2) and a second housing 62 into which the second terminal fittings 61 protrude. As shown in FIG. 1, the second housing 62 includes a rear wall portion 63 that is rectangular in front view and has a thickness in the front-to-rear direction, a peripheral wall portion 64 that protrudes forward from the outer periphery of the rear wall portion 63, and a pair of side plate portions 65 (see FIG. 2) that protrude rearward from both side ends of the rear wall portion 63. The rear wall portion 63 and the peripheral wall portion 64 are shaped like rectangular tubes and are fitted with the first housing 12. The rear wall portion 63 has a plurality of terminal insertion holes 66 that penetrate the rear wall portion 63 in the front-to-rear direction.

[0018] 1, the second terminal fitting 61 is pin-shaped or tab-shaped, and is inserted into the terminal insertion hole 66 from the rear and held by the rear wall portion 63. The second terminal fitting 61 also protrudes rearward from the rear wall portion 63, and is further bent downward and soldered to the circuit board 100 for electrical connection.

[0019] As shown in Fig. 2, each side plate portion 65 is shaped like a plate having a thickness in the left-right direction, and is arranged to cover each second terminal fitting 61 from both the left and right sides. A pair of legs 67 (see Fig. 3) are formed on each side plate portion 65 and protrude downward. As shown in Fig. 1, the legs 67 are inserted into fixing holes 110 of the circuit board 100. The second housing 62 is held on the circuit board 100 by the legs 67.

[0020] As shown in Fig. 3, the peripheral wall portion 64 has an upper wall 68 and a lower wall 69 that face each other in the vertical direction, and a pair of side walls 71 that face each other in the left-right direction. A locking portion 72 protrudes from the upper surface of the upper wall 68. The locking portion 72 engages with the locking arm 26 of the first housing 12. As shown in Figs. 2 and 3, a pair of flat truncated base portions 73 protrude from the outer surface of a middle portion between the top and bottom of each side wall 71. The base portions 73 are rectangular in side view and are formed on the side walls 71 so as to extend in the front-to-rear direction.

[0021] The second housing 62 also has a pair of detection portions 74 that protrude forward from the front end surfaces of the upper and lower middle portions of each side wall 71. As will be described later, the detection portions 74 are parts that detect the mating state between the first housing 12 and the second housing 62 by identifying the color state (color difference) and arrangement state (degree of overlap, etc.) between them and the seal member 16. The detection portions 74 are rectangular in side view and have a plate shape that is thick in the left-right direction. The rear end (base) of the detection portions 74 is connected to the base portion 73. The tip surface (front end surface) of the detection portions 74 is a vertical surface that extends long in the up-down direction.

[0022] (First connector 10) 1 and 5, the first housing 12 has a block-shaped housing main body 17, a fitting tubular portion 18 that surrounds the housing main body 17, and a connecting portion 19 that connects the fitting tubular portion 18 to the housing main body 17. The connecting portion 19 extends radially from the housing main body 17 and is connected to the fitting tubular portion 18. The space between the housing main body 17 and the second housing 62 and behind the connecting portion 19 forms a fitting space 21 into which a peripheral wall portion 64 of the second housing 62 fits.

[0023] The housing body 17 has a plurality of cavities 22 that penetrate the housing body 17 in the front-rear direction. Elastically deformable lances 23 are formed on the inner walls of the cavities 22 so as to protrude therefrom.

[0024] The first terminal fitting 11 is inserted into the cavity 22 from the front of the housing body 17. As shown in Fig. 1, the first terminal fitting 11 has a square cylindrical box portion 24. The box portion 24 is engaged with the lance 23, thereby temporarily preventing the first terminal fitting 11 from slipping out of the cavity 22.

[0025] With the first housing 12 and the second housing 62 fitted together, the second terminal fitting 61 is inserted into the box portion 24. The second terminal fitting 61 comes into contact with a resilient contact piece (not shown) formed inside the box portion 24, thereby electrically connecting the first terminal fitting 11 and the second terminal fitting 61. The first terminal fitting 11 also has a barrel portion 25 behind the box portion 24. The barrel portion 25 is crimped and connected to an end portion of the electric wire W, thereby electrically and mechanically connecting the first terminal fitting 11 to the electric wire W.

[0026] The retainer 13 is attached to the housing body 17 so as to cover the rear surface of the housing body 17. The retainer 13 suppresses the bending action of the lance 23, and secondarily prevents the first terminal fitting 11 from slipping out of the cavity 22.

[0027] 4, a lock arm 26 is formed to protrude from the upper surface of the housing main body 17. As shown in FIG. 1, the lock arm 26 engages with the lock portion 72, thereby maintaining the first housing 12 and the second housing 62 in a fitted state.

[0028] An accommodating recess 27 is recessed into the front surface of the housing body 17. As shown in Fig. 1, the rear surface of the accommodating recess 27 (the surface located on the rear side and facing forward) is located at the same position as the connecting portion 19 in the front-rear direction or at a position forward of the connecting portion 19. The front end of each cavity 22 opens into the rear surface of the accommodating recess 27.

[0029] The one-piece rubber stopper 14 is inserted into the accommodating recess 27 from the front of the housing body 17 and accommodated therein. The one-piece rubber stopper 14 has a plurality of seal holes 28 that penetrate the one-piece rubber stopper 14 in the front-to-rear direction. The electric wires W connected to the first terminal fittings 11 are inserted into the seal holes 28 in a liquid-tight manner. The outer peripheral surface of the one-piece rubber stopper 14 is in close contact with the inner peripheral surface of the accommodating recess 27, sealing the interior of the accommodating recess 27 in a liquid-tight manner.

[0030] The holder 15 is inserted into the accommodating recess 27 after the one-piece rubber stopper 14 and accommodated therein. The holder 15 has a plurality of insertion holes 29 penetrating the holder 15 in the front-to-rear direction. After the first terminal fittings 11 have passed through the insertion holes 29, the electric wires W are inserted into the insertion holes 29. As shown in FIGS. 4 and 9 , a pair of left and right holder locking portions 31 are formed on the upper and lower surfaces of the holder 15. A pair of left and right housing locking portions 32 are formed on the upper and lower walls of the accommodating recess 27 of the housing main body 17. The holder locking portions 31 and the housing locking portions 32 engage with each other, thereby holding the holder 15 in the first housing 12. The one-piece rubber stopper 14 is disposed between the holder 15 and the innermost surface of the accommodating recess 27, and is prevented from slipping out of the accommodating recess 27 by the holder 15.

[0031] As shown in Figures 5 and 9, a pair of bulging portions 33 are formed on both left and right ends of the fitting cylindrical portion 18, bulging outward to the left and right. As shown in Figure 4, the bulging portions 33 have a constant width in the up-down direction and are formed over the entire length of the fitting cylindrical portion 18 in the front-to-rear direction. As shown in Figure 5, the interior of each bulging portion 33 forms a recessed groove 34 that communicates with the fitting space 21. As shown in Figure 10, a base 73 and a base end portion 47 (described later) of the seal member 16 are disposed in the recessed groove 34 of the bulging portion 33 when the first housing 12 and the second housing 62 are fitted together. The base 73 is disposed so as to be able to come into contact with the inner surface of the recessed groove 34.

[0032] As shown in FIG. 5, both left and right ends of the connecting portion 19 have a pair of opposing surfaces 35 that close the front ends of the recessed grooves 34 of each bulge portion 33. As shown in FIG. 10, the opposing surfaces 35 face the base end portion 47 so as to be able to come into contact with the base end portion 47. Furthermore, both left and right ends of the connecting portion 19 are formed with a pair of retaining holes 36 that penetrate in the front-rear direction from each opposing surface 35 to the front surface of the connecting portion 19. A middle portion 49 of the sealing member 16, which will be described later, is inserted into and retained in each retaining hole 36. As shown in FIG. 5, each retaining hole 36 has a vertically oval cross-sectional shape (a cross-sectional shape cut in a direction perpendicular to the front-rear direction) that is elongated in the up-down direction.

[0033] The seal member 16 is exemplified as a so-called seal ring and has a seal body 37 attached to the outer peripheral surface of the housing body 17. As shown in Fig. 1, the front end face of the seal body 37 faces the connecting portion 19 so as to be able to come into contact with it, thereby preventing the seal member 16 from slipping out in the forward direction. In addition, the rear end face of the seal body 37 faces the retainer 13 so as to be able to come into contact with it, thereby preventing the seal member 16 from slipping out in the rear direction.

[0034] 6 and 8, the seal body 37 has an upper portion 41 and a lower portion 42 extending in the left-right direction (i.e., the longitudinal direction), a pair of side portions 43 extending in the up-down direction (i.e., the lateral direction), and four rounded corners 44 formed at the rectangular portions between the upper portion 41 and the side portions 43 and between the lower portion 42 and the side portions 43. The seal body 37 has a constant width dimension in the front-to-rear direction.

[0035] As shown in FIGS. 6 to 8 , a plurality of outer peripheral lips 45 are formed to protrude from the outer peripheral surface of the seal body 37. The outer peripheral lips 45 are arranged circumferentially continuous and aligned in the front-to-rear direction at the rear of the outer peripheral surface of the seal body 37. The seal body 37 is arranged so as to be sandwiched between the peripheral wall portion 64 of the second housing 62 and the housing main body 17. As shown in FIG. 1 , each outer peripheral lip 45 is in close contact with the inner peripheral surface of the peripheral wall portion 64 in a compressed state, maintaining a liquid-tight seal between the first housing 12 and the second housing 62.

[0036] 6 to 8, the seal member 16 has a pair of protrusions 46 protruding from the upper and lower middle portions of each side portion 43 of the seal body 37. Each protrusion 46 has a base end 47 protruding outward to the left and right from the front portion of the outer peripheral surface of the side portion 43, a tip end 48 disposed forward of the base end 47, and an intermediate portion 49 protruding forward from the base end 47 and connected to the tip end 48. The base end 47 has a rectangular block shape that is long in the vertical direction, and protrudes outward to the left and right from the side portion 43, and has a portion that protrudes forward of the side portion 43.

[0037] The tip portion 48 has a thickness in the left-right direction and is elongated in the up-down direction to correspond to the base end portion 47. The outer peripheral surface of the tip portion 48 has a tapered shape that gradually reduces in diameter toward the front. The intermediate portion 49 is formed with smaller up-down and left-right dimensions than the rear end of the tip portion 48. As shown in FIG. 7 , the rear surface of the tip portion 48 extends radially from the front end of the intermediate portion 49 and faces rearward. The front surface of the base end portion 47 extends radially from the rear end of the intermediate portion 49 and is opposite the rear surface of the tip portion 48.

[0038] As shown in FIG. 10 , the protrusion 46 has a through-hole 39 penetrating the protrusion 46 in the front-rear direction. That is, the through-hole 39 penetrates the base end 47, the intermediate portion 49, and the front end in the front-rear direction. As shown in FIG. 11 , the through-hole 39, like the retaining hole 36, has a vertically oval cross-sectional shape extending elongatedly in the up-down direction. A detection portion 74 is inserted into the through-hole 39. The detection portion 74 contacts the inner surface of the through-hole 39 when the first housing 12 and the second housing 62 are fitted together. The detection portion 74 and the protrusion 46 are arranged to overlap in the left-right and up-down directions when the first housing 12 and the second housing 62 are fitted together. As shown in FIGS. 9 and 10 , the tip surface of the detection portion 74 is arranged to face the front-end opening of the through-hole 39.

[0039] (Connector function) When assembling the first connector 10, the seal member 16 is fitted onto the outer peripheral surface of the housing main body 17. As shown in FIG. 4 , the tip end 48 of the protrusion 46 passes through the retaining hole 36 and protrudes forward of the coupling portion 19. The rear surface of the tip end 48 faces (is capable of contacting) the opening edge of the retaining hole 36 on the front surface of the coupling portion 19 (see FIG. 10 ). The intermediate portion 49 is disposed inside the retaining hole 36. The front surface of the base end 47 faces (is capable of contacting) the opening edge of the retaining hole 36 on the rear surface of the coupling portion 19. This prevents the protrusion 46 from shifting in the front-to-rear direction relative to the coupling portion 19. Furthermore, because the protrusion 46 is held by the coupling portion 19, the seal member 16 is also prevented from shifting in position relative to the first housing 12.

[0040] After assembling the first connector 10, the first housing 12 and the second housing 62 are mated together. During the mating process between the first housing 12 and the second housing 62, the peripheral wall 64 of the second housing 62 is inserted into the mating space 21 of the first housing 12, and the base 73 is inserted into the recessed groove 34 of the bulging portion 33. The locking arm 26 interferes with the locking portion 72 and is elastically deformed. During this process, the tip surface of the detection portion 74 is positioned rearward of the protrusion 46 and facing the through-hole 39. Air that may be compressed between the first housing 12 and the second housing 62 escapes to the outside through the through-hole 39. This prevents the internal pressure (air pressure) between the first housing 12 and the second housing 62 from increasing significantly.

[0041] Thereafter, the lock arm 26 elastically returns to its original position and is positioned so as to be able to engage with the lock portion 72, thereby maintaining the fitted state between the first housing 12 and the second housing 62. With the first housing 12 and the second housing 62 properly fitted in this manner, the first terminal fittings 11 and the second terminal fittings 61 are also properly connected.

[0042] 9 to 11, when the first housing 12 and the second housing 62 are properly fitted together, the detection portion 74 is inserted into the through hole 39 of the protrusion 46. The outer peripheral surface of the detection portion 74 contacts the inner surface of the through hole 39. The tip surface of the detection portion 74 is positioned so as to face the front opening of the through hole 39 and the front end surface of the protrusion 46. An operator can visually check the tip surface of the detection portion 74 from the front, and by being able to see the tip surface of the detection portion 74, the operator can determine that the first housing 12 and the second housing 62 are properly fitted together. In particular, the tip surface of the detection portion 74 and the front end surface of the protrusion 46, which is adjacent to and overlaps the tip surface of the detection portion 74, are colored differently from each other. Specifically, the tip surface of the detection portion 74 is gray or the like, and the front end surface of the protrusion 46 is orange or the like. Therefore, an operator can easily detect that the first housing 12 and the second housing 62 are properly fitted together by distinguishing the color difference (contrast ratio) between the tip surface of the detection portion 74 and the front end surface of the protrusion 46.

[0043] On the other hand, when the first housing 12 and the second housing 62 remain in a position that does not reach the position where they are properly mated (hereinafter referred to as the "partially mated position"), the detection unit 74 is located rearward of the protrusion 46 and is not inserted into the through-hole 39, or even if it is inserted into the through-hole 39, it remains in a deep position on the rear end side. Therefore, the operator cannot see the detection unit 74 from the front, and this enables the operator to detect that the first housing 12 and the second housing 62 are in the partially inserted position.

[0044] As described above, the connector of the first embodiment includes a first connector 10 and a second connector 60. The first connector 10 includes a first housing 12 that accommodates first terminal fittings 11, and a seal member 16 attached to the first housing 12. The second connector 60 includes a second housing 62 that fits into the first housing 12. The seal member 16 includes a seal body 37 that is disposed between the first housing 12 and the second housing 62 in a fitted state, and a protrusion 46 that protrudes from the seal body 37 and is exposed to the outside of the first housing 12. The second housing 62 includes a detection portion 74 that overlaps with the protrusion 46 in a fitted state with the first housing 12 and is arranged so as to be visible from the outside. The detection portion 74 and the protrusion 46 are different colors.

[0045] By visually checking from the outside that the detection portion 74 of the second housing 62 overlaps with the protrusion 46 of the seal member 16, it can be detected that the first housing 12 and the second housing 62 are properly fitted together. In particular, since the detection portion 74 and the protrusion 46 have different colors, visibility (distinguishing ability) can be improved when visually checking the detection portion 74 overlapping with the protrusion 46.

[0046] In the first embodiment, the detection portion 74 faces and contacts the protrusion 46 in the vertical and horizontal directions (directions intersecting the fitting direction of the second housing 62 into the first housing 12). This prevents liquid such as water from entering between the detection portion 74 and the protrusion 46, thereby improving the sealing performance of the seal member 16.

[0047] Furthermore, in the case of the first embodiment, the protrusion 46 protrudes forward from the seal body 37 (in the fitting direction of the second housing 62 relative to the first housing 12), and the detection portion 74 is arranged so as to be visible from the front when the first housing 12 and the second housing 62 are fitted together. When detecting the fitted state of the first housing 12 and the second housing 62, the direction in which the detection portion 74 is visible can be set to the front of the connector, so that it is possible to prevent something that is not the detection portion 74 from being mistaken for the detection portion 74, and it is possible to improve the reliability of detection.

[0048] Furthermore, in the first embodiment, the seal member 16 has a through hole 39 that penetrates the protrusion 46 in the front-rear direction. The detection unit 74 is disposed inside the through hole 39 when the first housing 12 and the second housing 62 are fitted together. During the process of fitting the first housing 12 and the second housing 62, air that may be compressed between the first housing 12 and the second housing 62 can be released through the through hole 39, thereby keeping fitting resistance low. As a result, the workload when fitting the first housing 12 and the second housing 62 can be reduced.

[0049] [Another embodiment of the present disclosure] The first embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. In the case of the above-mentioned first embodiment, the detection unit is colored in a common color for a housing, such as black or gray, and the protrusion is colored in a common color for a seal member, such as red or orange. In contrast, according to other embodiments, the detection unit and the protrusion may be colored to such an extent that the color difference between them is distinguishable, and the types of colors are not particularly limited. In the first embodiment described above, the first housing is colored the same throughout, including the detection portion, and the seal member is colored the same throughout, including the protruding portion. However, the detection portion may be colored a different color from the first housing except for the detection portion. Also, the protruding portion may be colored a different color from the seal member except for the protruding portion. Furthermore, the first housing and the second housing may be colored differently. In the first embodiment, the tip surface of the detection unit is disposed so as to face the front end opening of the through hole when the first housing and the second housing are fitted together. In contrast, in other embodiments, the tip surface of the detection unit may be disposed so as to protrude forward from the through hole when the first housing and the second housing are fitted together. In the first embodiment, the detection unit is inserted into the through-hole of the protrusion when the first housing and the second housing are fitted together. In contrast, in other embodiments, the protrusion does not have a through-hole, and the detection unit may be arranged so as to overlap the protrusion in the left-right or up-down direction when the first housing and the second housing are fitted together. [Explanation of symbols]

[0050] 10...First connector 11...First terminal fitting 12...1st housing 13...Retainer 14...Bulk rubber stopper 15...Holder 16...Sealing member 17...Housing body 18...Mating cylinder 19...Connection part 21...Mating space 22...cavity 23...Lance 24…Hakobe 25...Barrel section 26...Lock arm 27... Storage recess 28...Seal hole 29...Through hole 31...Holder lock part 32...Housing lock 33...bulge 34...Groove 35...opposing surface 36...Retaining hole 37...Seal body 39...Through hole 41...Upper 42...Lower 43...Side 44...Corner 45...Outer lip 46...Protrusion 47...Proximal end 48...Tip 49...Middle section 60...Second connector 61...Second terminal fitting 62...Second housing 63…Back wall part 64...Peripheral wall part 65...Side plate part 66...Terminal insertion hole 67...legs 68...Upper wall 69...Lower wall 71...Side wall 72...Rock section 73...Base 74…Detection unit 100...Circuit board 110…Fixing hole W…Electric wire

Claims

1. a first connector and a second connector; The first connector includes a first housing that accommodates first terminal fittings, and a seal member that is attached to the first housing, the second connector has a second housing that fits into the first housing, the seal member has a seal body disposed between the first housing and the second housing in a fitted state, and a protrusion protruding from the seal body and facing the outside of the first housing, the second housing has a detection portion that overlaps the protrusion when the second housing is fitted to the first housing and is arranged to be visible from the outside, The connector, wherein the detection portion and the protrusion have different colors.

2. The connector according to claim 1 , wherein the detection portion faces and contacts the protrusion in a direction intersecting a fitting direction of the second housing relative to the first housing.

3. 3. The connector according to claim 2, wherein the protrusion protrudes from the seal body in the mating direction, and the detection portion is positioned so as to be visible from the mating direction when the first housing and the second housing are mated.

4. the sealing member has a through hole that penetrates the protruding portion in the fitting direction, The connector according to claim 3 , wherein the detection portion is disposed inside the through hole when the first housing and the second housing are fitted together.

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