Relay connector

Abstract

To provide a relay connector that can prevent a sealing member from falling off.SOLUTION: A seal member 40 includes an annular seal body 41 and a fixed piece 42 extending from the seal body 41. The fixed piece 42 includes a through hole 43 that penetrates the fixed piece 42. A connector housing 20 includes a retaining pin 52 that retains the fixed piece 42 by being inserted into the through hole 43. The retaining pin 52 includes a pin body 61 and a protrusion 62 that protrudes from the pin body 61 toward its outer periphery. The through hole 43 has a hole body 71 into which the pin body 61 is inserted, and a first recess 72 that is recessed from the hole body 71 toward the outer periphery. The protrusion 62 is fitted into the first recess 72.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a relay connector. [Background technology]

[0002] For example, Patent Document 1 describes a relay connector to be attached to an equipment case. The relay connector is a connector for electrically connecting the inside and outside of the equipment case. The relay connector includes terminals, a connector housing that holds the terminals, and a seal member that seals between the connector housing and the equipment case. The seal member has an annular seal main body and multiple fixing pieces that extend inward from the seal main body. The connector housing has fixing protrusions at positions corresponding to the fixing pieces of the seal member. Each fixing protrusion is inserted into a hole provided in each fixing piece of the seal member. This allows the seal member to be held in the connector housing. The seal member is then sandwiched in a compressed state between the connector housing and the equipment case, thereby sealing between the connector housing and the equipment case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-117307 Summary of the Invention [Problem to be solved by the invention]

[0004] In the relay connector as described above, before the connector housing is assembled to the device case, the fixing piece of the sealing member may come off the fixing protrusion of the connector housing, causing the sealing member to fall off.

[0005] An object of the present disclosure is to provide a relay connector that can prevent a sealing member from falling off. [Means for solving the problem]

[0006] The relay connector of the present disclosure is attached to an equipment case and is used to electrically connect the inside and outside of the equipment case, and comprises: a terminal; a connector housing that holds the terminal; and a sealing member that seals between the connector housing and the equipment case, wherein the sealing member has an annular seal main body and a fixing piece extending from the seal main body, and the fixing piece has a through hole that passes through the fixing piece, and the connector housing has a retaining pin that holds the fixing piece by being inserted into the through hole, and the retaining pin has a pin main body and a protrusion that protrudes from the pin main body toward its outer periphery, and the through hole has a hole main body into which the pin main body is inserted and a first recess that is recessed from the hole main body toward the outer periphery, and the protrusion fits into the first recess. [Effects of the Invention]

[0007] According to the relay connector of the present disclosure, it is possible to prevent the sealing member from falling off. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a relay connector according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the relay connector in the same embodiment as seen from below. [Figure 3] FIG. 3 is a front view of the relay connector in the same embodiment. [Figure 4] FIG. 4 is a bottom view of the relay connector in the same embodiment. [Figure 5] FIG. 5 is a plan view of a device case to which the relay connector of the embodiment is attached. [Figure 6] FIG. 6 is a perspective view of the seal member in the same embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The relay connector of the present disclosure includes: [1] A relay connector that is attached to an equipment case and is used to electrically connect the inside and outside of the equipment case, comprising: a terminal; a connector housing that holds the terminal; and a sealing member that seals between the connector housing and the equipment case, wherein the sealing member has an annular seal main body and a fixing piece extending from the seal main body, and the fixing piece has a through hole that passes through the fixing piece, and the connector housing has a retaining pin that holds the fixing piece by being inserted into the through hole, and the retaining pin has a pin main body and a protrusion that protrudes from the pin main body toward its outer periphery, and the through hole has a hole main body into which the pin main body is inserted and a first recess that is recessed from the hole main body toward the outer periphery, and the protrusion fits into the first recess.

[0010] With this configuration, the through hole of the sealing member has a first recess into which the protruding portion of the retaining pin fits, thereby increasing the contact area between the outer circumferential surface of the retaining pin and the inner circumferential surface of the through hole of the sealing member. This makes it possible to prevent the retaining pin from coming out of the through hole, and as a result, to prevent the sealing member from falling off.

[0011] [2] In the above item [1], the holding pin may be configured to be able to fit into a positioning hole provided in the device case. With this configuration, the retaining pin of the connector housing can be used for both positioning relative to the device case and securing the seal member, which allows the connector housing to be made smaller than a configuration in which a protrusion for positioning relative to the device case and a protrusion for securing the seal member are provided separately.

[0012] [3] In the above [2], the connector housing may have a pair of the retaining pins, and the device case may have a pair of the positioning holes corresponding to the pair of retaining pins, and the pair of retaining pins may be arranged in positions that are point-symmetrical to each other around the central axis of the connector housing.

[0013] With this configuration, for example, when the connector housing is fastened with a bolt, the force applied to each retaining pin in a direction perpendicular to the protruding direction can be balanced, thereby reducing the risk of damage to the retaining pins.

[0014] [4] In the above [3], each of the pair of positioning holes may have a second recess into which the protrusion is fitted, and the protrusions on each of the pair of retaining pins may have asymmetric shapes relative to each other.

[0015] With this configuration, since the protrusions of each retaining pin are asymmetrical, it is possible to prevent misassembly of the connector housing, in which the connector housing is rotated 180 degrees around the central axis, and it is also possible to prevent misassembly of the seal member, in which the seal member is rotated 180 degrees around the central axis.

[0016] [Details of the embodiments of the present disclosure] Specific examples of relay connectors according to the present disclosure are described below with reference to the drawings. For ease of explanation, some components may be exaggerated or simplified in the drawings. The dimensional ratios of the components may differ between the drawings. In this specification, "orthogonal" does not necessarily mean strictly orthogonal, but also includes roughly orthogonal configurations within the scope of the functions and effects of the present embodiment. The term "annular" used in this specification may refer to any loop-forming structure, a continuous shape without ends, or a generally loop-shaped structure with a C-shaped gap. Examples of "annular" shapes include, but are not limited to, circles, ellipses, and polygons with sharp or rounded corners. In this specification, "facing" refers to surfaces or components facing each other, and includes not only cases where the surfaces or components are completely facing each other, but also cases where the surfaces or components are partially facing each other. In this specification, "facing" refers to both cases where a separate component is interposed between two components and cases where there is no component interposed between the two components. Furthermore, terms such as "first" and "second" in this specification are used merely to distinguish between objects and do not rank the objects. 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 equivalent to the claims.

[0017] (Overall composition) As shown in FIG. 1 , the relay connector 10 is attached to an equipment case 11 mounted on a vehicle. The relay connector 10 is fixed to the equipment case 11 by, for example, bolts B. The relay connector 10 is a connector for electrically connecting the inside and outside of the equipment case 11. The equipment case 11 is, for example, a transmission case. The equipment case 11 is made of, for example, metal. Note that the drawing shows only a portion of the equipment case 11. The inside of the equipment case 11 is, for example, an oil environment, and the outside of the equipment case 11 is an air environment. Electrical components such as a motor and a sensor are provided inside the equipment case 11. The equipment case 11 has an opening 12 through which the relay connector 10 passes. The opening 12 is formed in the equipment case 11 so as to connect the internal space of the equipment case 11 with the external space. The relay connector 10 is attached to the opening 12 of the equipment case 11 along a first direction D1. Note that in the following description, the direction opposite to the first direction D1 will be referred to as a second direction D2.

[0018] (Configuration of relay connector 10) As shown in Fig. 3, the relay connector 10 includes a connector housing 20, terminals 30, and a seal member 40. The connector housing 20 is made of an insulating material such as synthetic resin. The relay connector 10 includes, for example, a plurality of terminals 30. Each terminal 30 is made of a conductor. Each terminal 30 is held in the connector housing 20.

[0019] (Configuration of connector housing 20) As shown in FIGS. 1, 2 and 3, the connector housing 20 includes a fixing flange 21, an internal connection portion 22 and an external connection portion .

[0020] The fixing flange 21 has, for example, a flat shape extending along a plane perpendicular to the first direction D1. The fixing flange 21 is fixed to the outer surface of the device case 11 so as to cover the opening 12. The side of the fixing flange 21 facing the device case 11 in the first direction D1 is referred to as the first side surface 21a, and the side opposite to the first side surface 21a is referred to as the second side surface 21b.

[0021] The internal connection portion 22 extends, for example, from the first side surface 21a of the fixing flange 21 along the first direction D1. The internal connection portion 22 is inserted into the opening 12 of the device case 11 in the first direction D1. The external connection portion 23 extends from the second side surface 21b of the fixing flange 21. The external connection portion 23 is provided with a fitting portion 24 into which a mating connector (not shown) is fitted. Note that a potting process may be applied to the back of the fitting portion 24.

[0022] The fixing flange 21 has, for example, a pair of fixing portions 25 fixed to the device case 11. Each fixing portion 25 is, for example, a cylindrical collar embedded in the synthetic resin that constitutes the fixing flange 21. Each fixing portion 25 is made of, for example, metal. The cylindrical fixing portion 25 is provided so that its penetration direction is along the first direction D1. The pair of fixing portions 25 are provided at positions that are point-symmetrical with each other about the central axis L1 of the connector housing 20 (see FIG. 4). The central axis L1 of the connector housing 20 extends along the first direction D1. A bolt B shown in FIG. 1 is inserted into each fixing portion 25, and the fixing portion 25 is fastened to the device case 11 by the bolt B. The bolt B is screwed into an internally threaded hole 13 provided in the device case 11.

[0023] As shown in FIG. 3 , each terminal 30 in the relay connector 10 is partially embedded in the connector housing 20. Each terminal 30 has a first connection end 31 exposed at the internal connection portion 22 and a second connection end 32 exposed at the mating portion 24 of the external connection portion 23. The first connection end 31 of each terminal 30 is electrically connected to an internal component (not shown) provided inside the device case 11. The second connection end 32 of each terminal 30 is electrically connected to a mating connector mated with the mating portion 24. The mating connector is provided in, for example, a control unit that houses a control circuit and the like. That is, the control circuit provided in the control unit is electrically connected to the internal component via the relay connector 10.

[0024] (Configuration of seal member 40) The seal member 40 is provided so as to be sandwiched between the fixed flange 21 and the outer surface of the device case 11. As shown in Figs. 2 and 4, the seal member 40 has an annular seal main body 41 and fixing pieces 42 extending from the inner edge of the seal main body 41 toward the inner periphery of the seal main body 41. The fixing pieces 42 have through holes 43 that penetrate the fixing pieces 42. The seal member 40 of this embodiment has, for example, a pair of fixing pieces 42. The entire seal member 40, including the seal main body 41 and the fixing pieces 42, is formed of an elastic material such as rubber.

[0025] (Detailed configuration of fixed flange 21) 2 and 4, the fixing flange 21 has an annular accommodating groove 51 provided in the first side surface 21a, and a retaining pin 52 provided in the accommodating groove 51. When the connector housing 20 is viewed in the second direction D2, the accommodating groove 51 is provided so as to surround the periphery of the internal connection portion 22. A seal member 40 is accommodated in the accommodating groove 51. Before the fixing flange 21 is fixed to the device case 11, a portion of the seal member 40 protrudes from the accommodating groove 51 in the first direction D1. Each fixing portion 25 is provided in a portion of the fixing flange 21 that is outer circumferential than the accommodating groove 51. That is, each fixing portion 25 is provided outer circumferentially than the seal member 40 accommodated in the accommodating groove 51.

[0026] (Configuration of holding pin 52) The fixing flange 21 has, for example, a pair of holding pins 52. Each holding pin 52 is inserted into the through-hole 43 of each fixing piece 42 to hold the corresponding fixing piece 42.

[0027] 4, the pair of retaining pins 52 are provided at positions that are point-symmetrical with respect to each other about the central axis L1 of the connector housing 20. That is, the pair of retaining pins 52 are provided at positions that are 180 degrees apart from each other about the central axis L1.

[0028] Each retaining pin 52 has a pin main body 61 and protrusions 62 protruding from the pin main body 61 toward its outer periphery. The pin main body 61 extends from the accommodation groove 51 along the first direction D1. The cross-sectional shape of the pin main body 61 (the cross-sectional shape perpendicular to the first direction D1) is, for example, circular. The protrusions 62 are provided, for example, at the base portion of the pin main body 61. Each retaining pin 52 is provided with, for example, a plurality of protrusions 62. In this embodiment, each retaining pin 52 has four protrusions 62. In each retaining pin 52, the four protrusions 62 are provided at equal angular intervals (90-degree intervals in this embodiment) around the pin main body 61.

[0029] As shown in FIGS. 4 and 6 , the through hole 43 in each fixing piece 42 of the seal member 40 has a hole main body 71 into which the pin main body 61 is inserted and a first recess 72 recessed radially outward from the hole main body 71. Four first recesses 72 are provided corresponding to the protrusions 62 of the retaining pin 52. Each protrusion 62 fits into a corresponding first recess 72. Each protrusion 62 contacts the inner circumferential surface of the through hole 43 (the inner surface of each first recess 72). The length of each protrusion 62 in the longitudinal direction (first direction D1) of the retaining pin 52 is set longer than the thickness of the fixing piece 42. As a result, each protrusion 62 protrudes from the through hole 43 of the fixing piece 42 in the first direction D1 (see FIG. 2 ).

[0030] 4, one of the pair of retaining pins 52 is designated as a first retaining pin 52a, and the other is designated as a second retaining pin 52b. The protrusion 62 of the first retaining pin 52a and the protrusion 62 of the second retaining pin 52b are asymmetrical with respect to each other. In this embodiment, the protrusion 62 of the first retaining pin 52a and the protrusion 62 of the second retaining pin 52b are formed at different positions in the circumferential direction of the pin main body 61. More specifically, the protrusion 62 of the first retaining pin 52a and the protrusion 62 of the second retaining pin 52b are formed at positions that are offset from each other in the circumferential direction of the pin main body 61 by, for example, 45 degrees.

[0031] 5, the device case 11 has a first positioning hole 14a and a second positioning hole 14b. The pin body 61 and each protrusion 62 of the first retaining pin 52a of the connector housing 20 are fitted into the first positioning hole 14a along the first direction D1. That is, the first positioning hole 14a has four second recesses 15 into which the four protrusions 62 of the first retaining pin 52a are respectively fitted. Each second recess 15 of the first positioning hole 14a is provided at a position corresponding to each protrusion 62 of the first retaining pin 52a.

[0032] The pin body 61 and each protrusion 62 of the second retaining pin 52b of the connector housing 20 are fitted into the second positioning hole 14b along the first direction D1. That is, the second positioning hole 14b has four second recesses 15 into which the four protrusions 62 of the second retaining pin 52b are fitted, respectively. The second recesses 15 of the second positioning hole 14b are provided at positions corresponding to the respective protrusions 62 of the second retaining pin 52b.

[0033] The first retaining pin 52a and the second retaining pin 52b are fitted into the first positioning hole 14a and the second positioning hole 14b, respectively, so that the fixing flange 21 is positioned in a direction perpendicular to the first direction D1. Furthermore, because the fixing flange 21 is positioned by the retaining pins 52, the workability of fastening the fixing flange 21 to the equipment case 11 with bolts is improved.

[0034] (Action of this embodiment) The operation of this embodiment will be described below. When assembling the seal member 40 to the fixed flange 21 of the connector housing 20, the retaining pins 52 are inserted into the through holes 43 of the fixing pieces 42 of the seal member 40. At this time, the protrusions 62 of the retaining pins 52 are inserted into the first recesses 72 of the through holes 43. This increases the contact area between the outer circumferential surface of the retaining pin 52 and the inner circumferential surface of the through hole 43. Then, due to friction between the outer circumferential surface of the retaining pin 52 and the inner circumferential surface of the through hole 43, the fixing pieces 42 of the seal member 40 are held by the retaining pin 52, and the seal member 40 is maintained housed in the housing groove 51.

[0035] When assembling the connector housing 20 to the device case 11, the internal connection portion 22 is inserted into the opening 12 of the device case 11 in the first direction D1. Then, the first retaining pin 52a and the second retaining pin 52b of the connector housing 20 are fitted into the first positioning hole 14a and the second positioning hole 14b of the device case 11 along the first direction D1, respectively. This positions the fixing flange 21 relative to the device case 11 in a direction perpendicular to the first direction D1.

[0036] Thereafter, the fixing flange 21 is fastened to the equipment case 11 by the bolts B. The seal member 40 accommodated in the accommodation groove 51 of the fixing flange 21 is sandwiched in a compressed state between the fixing flange 21 and the equipment case 11 at a position surrounding the opening 12 of the equipment case 11. This creates a seal between the fixing flange 21 and the equipment case 11 by the seal member 40. Note that, for example, in the seal member 40, the seal main body 41 and each fixing piece 42 are sandwiched in a compressed state between the fixing flange 21 and the equipment case 11.

[0037] (Effects of this embodiment) The effects of this embodiment will be described below. (1) The retaining pin 52 has a pin main body 61 and a protruding portion 62 that protrudes radially outward from the pin main body 61. The through hole 43 has a hole main body 71 into which the pin main body 61 is inserted and a first recess 72 that recesses radially outward from the hole main body 71. The protruding portion 62 fits into the first recess 72. With this configuration, the through hole 43 of the seal member 40 has the first recess 72 into which the protruding portion 62 of the retaining pin 52 fits, thereby increasing the contact area between the outer circumferential surface of the retaining pin 52 and the inner circumferential surface of the through hole 43 of the seal member 40. This prevents the retaining pin 52 from coming out of the through hole 43, thereby preventing the seal member 40 from falling off.

[0038] (2) The first retaining pin 52a and the second retaining pin 52b are configured to be able to fit into the first positioning hole 14a and the second positioning hole 14b, respectively, provided in the device case 11. With this configuration, each retaining pin 52 of the connector housing 20 can be used for both positioning with respect to the device case 11 and fixing the seal member 40. Therefore, the connector housing 20 can be made smaller than in a configuration in which a protrusion for positioning with respect to the device case 11 and a protrusion for fixing the seal member 40 are provided separately.

[0039] (3) The connector housing 20 has a pair of retaining pins 52 (first retaining pin 52a and second retaining pin 52b). The device case 11 has a first positioning hole 14a and a second positioning hole 14b corresponding to the first retaining pin 52a and the second retaining pin 52b, respectively. The first retaining pin 52a and the second retaining pin 52b are provided at positions that are point-symmetric with each other about the central axis L1 of the connector housing 20. When the bolt B is fastened, not only an axial force from the bolt B but also a circumferential force about the bolt B (a force in a direction perpendicular to the first direction D1) is applied to the fixing flange 21. Here, because the first retaining pin 52a and the second retaining pin 52b are provided at positions that are point-symmetric with each other about the central axis L1 of the connector housing 20, the circumferential force can be applied to the first retaining pin 52a and the second retaining pin 52b in a balanced manner. As a result, it is possible to reduce the risk of damage to the first holding pin 52a and the second holding pin 52b.

[0040] (4) Each of the first positioning hole 14a and the second positioning hole 14b has a second recess 15 into which the protrusion 62 is fitted. The protrusions 62 of the first retaining pin 52a and the second retaining pin 52b are asymmetrical with respect to each other. When the connector housing 20 is rotated 180 degrees around the central axis L1 and assembled, the position of the first retaining pin 52a coincides with the position of the second positioning hole 14b, and the position of the second retaining pin 52b coincides with the position of the first positioning hole 14a. However, as described above, the protrusions 62 of the first retaining pin 52a and the second retaining pin 52b are asymmetrical with respect to each other. Furthermore, the second recesses 15 of the first positioning hole 14a and the second positioning hole 14b are shaped to correspond to the protrusions 62 of the first retaining pin 52a and the second retaining pin 52b, respectively. For this reason, the protrusion 62 of the first retaining pin 52a cannot be fitted into the second recess 15 of the second positioning hole 14b. Similarly, the protrusion 62 of the second retaining pin 52b cannot be fitted into the second recess 15 of the first positioning hole 14a. Therefore, it is possible to prevent the connector housing 20 from being assembled by being rotated 180 degrees around the central axis L1. Furthermore, in the seal member 40, the first recess 72 of the through hole 43 into which the protrusion 62 of the first retaining pin 52a is inserted and the first recess 72 of the through hole 43 into which the protrusion 62 of the second retaining pin 52b is inserted have asymmetric shapes. Therefore, it is possible to prevent the seal member 40 from being assembled by being rotated 180 degrees around the central axis L1.

[0041] (Other embodiments) The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0042] The configuration of the protrusions 62 of each holding pin 52, such as the number and shape, is not limited to that of the above embodiment and can be changed as appropriate depending on the configuration of the relay connector 10. For example, the number of protrusions 62 of each holding pin 52 may be three or less, including one, or five or more. Note that, in accordance with the change in the number of protrusions 62, the number of first recesses 72 in the through hole 43 of the seal member 40 and the number of second recesses 15 in each of the first positioning hole 14a and the second positioning hole 14b can also be changed as appropriate.

[0043] The asymmetrical shapes of the protrusions 62 of the first and second retaining pins 52a and 52b are not limited to those described in the above embodiment and can be modified as appropriate. For example, the positions of the protrusions 62 in the circumferential direction of the pin body 61 may be offset by an angle other than 45 degrees between the first and second retaining pins 52a and 52b. Also, for example, the lengths of the protrusions 62 in the radial direction of the pin body 61 may be different between the first and second retaining pins 52a and 52b.

[0044] The protrusions 62 of the first holding pin 52a and the second holding pin 52b may be symmetrical to each other. The first retaining pin 52a and the second retaining pin 52b may be provided at positions that are not point-symmetric with respect to each other about the central axis L1 of the connector housing 20. This configuration makes it possible to prevent incorrect assembly, in which the connector housing 20 is assembled by being rotated 180 degrees around the central axis L1.

[0045] In the above embodiment, only the pin body portion 61 of each holding pin 52 may be fitted into each of the positioning holes 14a, 14b. The number of retaining pins 52 on the fixing flange 21 is not limited to two as in the above embodiment, but may be, for example, one, or three or more. Note that the number of fixing pieces 42 on the sealing member 40 can also be changed as needed in accordance with the change in the number of retaining pins 52.

[0046] In the above embodiment, each retaining pin 52 is used for both positioning relative to the equipment case 11 and fixing the sealing member 40, but this is not limited to this. A pin for positioning relative to the equipment case 11 may be provided in the connector housing 20 separately from the retaining pin 52.

[0047] In the above embodiment, the fixing portion 25 is a collar separate from the resin portion of the fixing flange 21, but this is not limiting and the fixing portion 25 may be, for example, a bolt insertion hole formed through the resin portion of the fixing flange 21.

[0048] The number of fixing portions 25 provided on the connector housing 20 is not limited to that in the above embodiment, and may be one or three or more. The seal member 40 in the above embodiment may be made of an elastic material other than rubber.

[0049] In the above embodiment, the relay connector 10 is embodied as being attached to the equipment case 11, which is a transmission case, but is not limited to this. For example, the relay connector 10 may be applied to a relay connector used in an equipment case other than a transmission case. Note that the environment inside the equipment case 11 to which the relay connector 10 is attached is not limited to an oil environment, and the relay connector may also be applied to a relay connector for equipment that does not use oil inside the equipment case 11.

[0050] The embodiments disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0051] 10 Relay connector 11 Equipment case 12 Opening 13 Female thread hole 14a First positioning hole (positioning hole) 14b Second positioning hole (positioning hole) 15 Second recess 20 Connector housing 21 Fixed flange 21a 1st side 21b Second side 22 Internal Connections 23 External connection part 24 Fitting part 25 Fixed part 30 terminals 31 first connection end 32 second connection end 40 sealing material 41 Seal body 42 Fixed piece 43 Through hole 51 Storage groove 52 Retaining pin 52a First retaining pin (retaining pin) 52b Second retaining pin (retaining pin) 61 Pin body 62 Protrusion 71 Hole body 72 First recess B Bolt D1 1st direction D2 2nd direction L1 Central axis of connector housing

Claims

1. A relay connector that is attached to an equipment case and electrically connects the inside and outside of the equipment case, a terminal, a connector housing that holds the terminal, and a seal member that seals between the connector housing and the device case, The seal member has an annular seal main body and a fixing piece extending from the seal main body, The fixing piece has a through hole passing through the fixing piece, the connector housing has a holding pin that is inserted into the through hole to hold the fixing piece, The retaining pin has a pin main body and a protrusion protruding from the pin main body toward its outer periphery, the through hole has a hole main body into which the pin main body is inserted and a first recess recessed from the hole main body toward an outer periphery, The protrusion is recessed into the first recess. Relay connector.

2. The retaining pin is configured to be able to fit into a positioning hole provided in the device case. The relay connector according to claim 1 .

3. The connector housing has a pair of the retaining pins, the device case has a pair of the positioning holes corresponding to the pair of the holding pins, The pair of retaining pins are provided at positions that are point-symmetrical with respect to a central axis of the connector housing. The relay connector according to claim 2 .

4. Each of the pair of positioning holes has a second recess into which the protrusion is fitted, The protrusions of the pair of retaining pins are asymmetrical in shape. The relay connector according to claim 3.

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