JP6053920B2 - Connector waterproof structure - Google Patents

Description

  The present invention relates to a waterproof structure for a connector.

  In an electric device mounted on a moving body such as an automobile, a connector is connected to an insertion port formed in the housing. As this type of connector, an L-shaped connector formed by bending a terminal to which an electric wire is connected into an L shape is known. According to this, since the electric wire connected to the electric equipment can be routed along the instrument wall of the electric equipment, for example, the wiring space for the electric wire can be reduced.

  By the way, such a connector is required to be shielded against electromagnetic waves generated from electric wires. In addition, waterproofing measures are required to prevent water from entering the housing from the insertion port. As this type of connector, a shield connector shown in FIG. 9 has been proposed (see Patent Document 1).

  The shield connector 1 shown in FIG. 9 includes a pair of terminals 2a and 2b, a connector housing 3 that accommodates the terminals 2a and 2b, a metal shield shell 4 that covers the connector housing 3, an electric wire 5, and a terminal 2a. , 2b and a pair of first and second seal members 6a, 6b having elasticity. In the pair of terminals 2a and 2b, the conductor end 7 exposed by peeling the insulating coating of the electric wire 5 is connected to one end, and the terminal on the electric device side is connected to the other end. The pair of terminals 2a and 2b are formed in an L shape by bending between one end and the other end. The shield shell 4 includes a first shield shell 4a and a second shield shell 4b that are provided separately from each other.

  The assembly method of the shield connector 1 is as follows. First, of the pair of first and second seal members 6a and 6b, the first seal member 6a is fitted into the connector housing 3, and the connection portions between the conductor end 7 of the electric wire 5 and the terminals 2a and 2b are respectively first. 1 is accommodated in the recess 8 of the seal member 6a. At this time, the other end portions of the terminals 2a and 2b are pierced through the first seal member 6a, passed through the through hole of the connector housing 3, and extracted to the outside while being held by the terminal holding portion 9. In this state, the second seal member 6b is overlaid on the first seal member 6a. Then, in a state where the first shield shell 4a is overlapped with the connector housing 3, the one end 3a of the connector housing 3 and the electric wire 5 are sandwiched between the first shield shell 4a and the second shield shell 4b, and the first shield The shell 4a and the second shield shell 4b are fixed to each other with bolts. Accordingly, the pair of first and second seal members 6a and 6b are pressed and compressed by the first shield shell 4a and the second shield shell 4b, respectively, and are in close contact with each other.

  In the shielded connector 1 assembled in this way, the terminal holding part 9 is inserted into the insertion port of the body wall of the casing (not shown), and the grounding part 10 protruding from the first shield shell 4a is fastened to the body wall with the bolt 12. Is attached to the housing.

Japanese Unexamined Patent Publication No. 2010-272404

  By the way, in the shield connector 1 described in Patent Document 1, the first and second seal members 6a and 6b are compressed by fixing the first shield shell 4a and the second shield shell 4b to each other. However, since the second shield shell 4b is pressed against the one end 3a of the connector housing 3, the pressing force applied to the mating surfaces of the pair of first and second seal members 6a and 6b may be non-uniform. . If the pressing force applied to the mating surfaces of the first and second seal members 6a and 6b is not uniform, there is a risk that desired sealing properties (waterproofness) cannot be ensured. Thus, the shield connector described in Patent Document 1 has room for improvement in terms of waterproofness.

  This invention is made | formed in view of the said condition, The objective is to provide the waterproof structure of the connector which can improve the waterproofness of a connector by improving the sealing performance of a pair of sealing member.

The above object of the present invention is achieved by the following configuration.
(1) A coaxial or multi-core electric wire, a plurality of terminals respectively connected to the exposed end portions of the conductor exposed by peeling off the insulation coating of these electric wires, and exposing these terminals to the outside, A waterproof structure of a connector comprising a housing that accommodates a connection portion between the terminal and the conductor, and a shield shell that covers the housing, wherein the housing is erected in a cylindrical shape from an outer edge portion of the bottom wall An opening formed at an end of a side wall; an attachment hole provided in the bottom wall for extracting and holding the plurality of terminals; an electric wire extraction portion provided in the side wall for extracting the electric wire to the outside; and the bottom A metal plate that is held along the wall and has a locking portion that protrudes away from the wire extraction portion, and the shield shell is attached to cover the opening of the housing An engaging portion with which the locking portion is engaged, and a pair of flange portions protruding in a direction opposite to the accommodating portion from a pair of side walls facing the accommodating portion accommodating the housing, the flange portion Each of which is formed with a fastening hole through which a fastening member is inserted, and between the housing and the shield shell, a pair of elastic members surrounding the connection portion and the exposed end portion of each conductor. The seal members are compressed and accommodated, and the mating surfaces of these seal members are substantially orthogonal to the axial direction of the fastening hole, and the seal member is in close contact with the outer peripheral surface of the electric wire and surrounds the electric wire. A waterproof structure for a connector provided with a relief portion that is formed in a portion corresponding to a seal portion that is pressed from the direction and that reduces a compressive force in a direction along the axial direction of the fastening hole .

According to the waterproof structure of the connector configured as described in (1) above, the engaging portion of the shield shell is engaged with the engaging portion of the housing, and the fastening member that passes through the fastening hole of the shield shell is attached (the device of the electric device). Fastened to the wall), the housing is sandwiched between the instrument wall and the shield shell, and the pair of seal members can be pressed from at least three locations (three directions) of the engagement portion and the pair of flange portions. . Thereby, since a pair of sealing member can be uniformly pressed along a mating surface, the sealing performance of these sealing members can be improved, and the waterproofness of a connector can be improved.
Further, when the pair of seal members are accommodated between the housing and the shield shell and compressed, a relief portion formed in a portion corresponding to the seal portion that presses the electric wire from the circumferential direction extends along the axial direction of the fastening hole. Since the compressive force in the direction is reduced, it is possible to apply stress uniformly to the outer peripheral surface of the electric wire at the seal portion of the pair of seal members. Therefore, it is possible to minimize the load for tightening the housing and the shield shell necessary to ensure waterproofness, and to prevent the housing from becoming thick and the fastening member from becoming large.
That is, if the compressive force is concentrated only in the direction along the axial direction of the fastening hole with respect to the seal portion that presses the electric wire from the circumferential direction, the compressive force from other directions is reduced. Therefore, in order to ensure waterproofness, the load for fastening the housing and the shield shell to each other must be increased so that the compressive force from other directions is ensured, resulting in a thicker housing and a larger fastening member. However, according to the waterproof structure of the connector having the configuration (1), this can be prevented.

(2) A coaxial or multi-core electric wire, a plurality of terminals respectively connected to exposed end portions of the conductor exposed by peeling off the insulation coating of these electric wires, and exposing these terminals to the outside, and these A waterproof structure of a connector comprising a housing that accommodates a connection portion between the terminal and the conductor, and a shield shell that covers the housing, wherein the housing is erected in a cylindrical shape from an outer edge portion of the bottom wall An opening formed at an end of a side wall; an attachment hole provided in the bottom wall for extracting and holding the plurality of terminals; an electric wire extraction portion provided in the side wall for extracting the electric wire to the outside; and the bottom A metal plate that is held along the wall and has a locking portion that protrudes away from the wire extraction portion, and the shield shell is attached to cover the opening of the housing An engaging portion with which the locking portion is engaged, and a pair of flange portions projecting in a direction opposite to the accommodating portion from a pair of side walls facing the accommodating portion accommodating the housing, Each has a fastening hole through which a fastening member is inserted, and a pair of elastic seals surrounding the connecting portion and the exposed end portion of each conductor between the housing and the shield shell. The members are compressed and accommodated, the mating surfaces of these seal members are substantially orthogonal to the axial direction of the fastening holes, and the pair of seal members are each formed in a substantially V-shaped cross section, The mating surfaces that are in contact with each other are formed so as to increase the distance from each other toward the outside from a seal portion that presses the electric wire from the circumferential direction in close contact with the outer circumferential surface of the electric wire, Wherein by a pair of sealing members are compressed housed between the housing and the shield shell, a waterproof structure of the connector to be substantially perpendicular to the axial direction of the fastening holes.

According to the waterproof structure of the connector configured as described in (2) above, when the pair of seal members are accommodated between the housing and the shield shell and compressed, the mating surfaces come into contact with each other so that the mating surfaces come into contact with each other. When the seal member is deformed, a load is applied to the seal portion of the pair of seal members in the direction perpendicular to the tangent line of the electric wire, so that the compressive force is not concentrated in the direction along the axial direction of the fastening hole, and the seal portion is Stress can be applied uniformly to the outer peripheral surface. Therefore, it is possible to minimize the load for tightening the housing and the shield shell necessary to ensure waterproofness, and to prevent the housing from becoming thick and the fastening member from becoming large.

(3) The connector waterproof structure according to (1) or (2) , wherein the metal plate is formed with a through hole through which the fastening member passed through the fastening hole is inserted .

According to the waterproof structure of the connector configured as described in (3) above, the fastening member passed through the fastening hole of the shield shell is inserted into the through hole of the metal plate, so that the positional relationship between the housing and the shield shell is properly maintained. Therefore, the sealing performance of the pair of sealing members accommodated between them can be improved more reliably.

(4) Enclose the electric wire so as to surround the end portion of the metal plate opposite to the engaging portion and the end portion of the shield shell opposite to the engaging portion. The tip of the cylindrical shield conductor is covered, and the tip is held by the end by tightening a mounting member that surrounds the tip. Waterproof structure of the connector described in 1.

According to the waterproof structure of the connector configured as described in (4) above , the housing member and the shield shell can be tightened together in addition to holding the tip of the shield conductor by tightening the mounting member. The sealing member can be pressed more uniformly, and the waterproofness of the connector can be further increased.

  According to the waterproof structure of the connector of the present invention, since the sealing performance of the pair of sealing members can be improved, the waterproof performance of the connector can be improved.

FIG. 1 is an exploded perspective view of a connector according to a first embodiment to which the waterproof structure of the connector of the present invention is applied. 2 is a perspective view showing an appearance of the connector shown in FIG. 1 in an assembled state. FIG. 2 (a) is a view of the connector from the front, and FIG. 2 (b) is a view of the connector from the rear. It is. FIG. 3 is a plan view of the connector attached to the electrical device as viewed from the rear. FIG. 4 is a longitudinal sectional view showing a state in which the connector according to the first embodiment to which the waterproof structure of the connector of the present invention is applied is connected to the terminal block of the electric device. FIG. 5 is an exploded perspective view of a connector according to a second embodiment to which the waterproof structure of the connector of the present invention is applied. 6 (a) is an exploded perspective view of the main part of the connector according to the third embodiment to which the waterproof structure of the connector of the present invention is applied, and FIG. 6 (b) shows the connector shown in FIG. 6 (a). It is a horizontal sectional view of the assembled state. FIG. 7 is a cross-sectional view of an essential part for explaining a modification of the connector shown in FIG. 6. FIG. 7 (a) is a horizontal cross-sectional view showing a state before the shield shell is assembled, and FIG. 7 (b). FIG. 4 is a horizontal sectional view of the connector assembled. FIG. 8 is a cross-sectional view of an essential part for explaining a connector according to a fourth embodiment to which the waterproof structure of the connector of the present invention is applied. FIG. 8A is a horizontal view showing a state before the shield shell is assembled. FIG. 8B is a horizontal sectional view of the connector assembled. It is an assembly drawing of the conventional connector.

  Hereinafter, an embodiment of a connector to which a waterproof structure of a connector according to the present invention is applied will be described with reference to the drawings.

  As shown in FIG. 4, the connector 11 according to the first embodiment of the present invention is for connecting a coaxial electric wire (electric wire) 15 to a terminal block 13 provided in an electric device. The electrical device is provided with an insertion port 19 for inserting the connector 11 into the wall 17 facing the terminal block 13. As will be described later, the connector 11 is attached to the instrument wall 17 via a bolt in a state where the distal end portion is inserted into the insertion port 19.

  As shown in FIG. 1, the connector 11 includes a coaxial cable 15, an inner conductor terminal 21, an outer conductor terminal 23, a sleeve 25, a pair of seal members (a front seal member 27 and a rear seal member 29), and a housing. 31 and a shield shell 33. In the following description, the direction in which the connector 11 is inserted into the insertion port 19 of the terminal block 13 (the left side in FIG. 1) is the front of the connector 11, and the opposite direction to the axial direction (the right side in FIG. 1) is the rear. Represent as

  The coaxial cable 15 according to the first embodiment includes an inner conductor 35, an inner insulator (insulation coating) 37 that surrounds and covers the outer periphery of the inner conductor 35, and an outer conductor that surrounds the outer periphery of the inner insulator 37. 39 and an external insulator (insulating coating) 41 that surrounds and covers the outer periphery of the outer conductor 39. The coaxial cable 15 includes a shield conductor 43 that surrounds the outer periphery of the external insulator 41, and a wire insulator 44 that surrounds the outer periphery of the shield conductor 43. For example, a braided wire or a metal foil is used for the shield conductor 43.

  The internal conductor terminal 21 is a terminal to which the internal conductor 35 of the coaxial cable 15 is connected, and extends in a substantially semi-cylindrical shape from the internal conductor connection portion 45 formed in a flat plate shape and one end of the internal conductor connection portion 45. And an internal terminal extension 47. The external conductor terminal 23 is a terminal to which the external conductor 39 of the coaxial cable 15 is connected. The external conductor connection portion 49 formed in a cylindrical shape and the one end of the external conductor connection portion 49 are bent at a substantially right angle and are substantially bent. And an external terminal extension 51 extending in a semi-cylindrical shape. In the first embodiment, the internal terminal extension 47 and the external terminal extension 51 are arranged coaxially along the insertion direction so as to face each other in a substantially cylindrical shape.

  Both the front seal member 27 and the rear seal member 29 are formed in a substantially rectangular parallelepiped shape by an insulating material having elasticity (for example, synthetic rubber). And the recessed part is each formed inside the mating surface contact | abutted mutually. The mating surfaces of the front seal member 27 and the rear seal member 29 are overlapped with each other, and at least a connection portion between the internal conductor terminal 21 and the internal conductor 35, the external conductor terminal 23, and the space formed by the concave portions of both seal members A connection portion with the external conductor 39 and the exposed end portions of the internal conductor 35 and the external conductor 39 (hereinafter referred to as exposed end portions) are accommodated. That is, the front seal member 27 and the rear seal member 29 are formed so as to surround these connecting portions and exposed end portions.

  Each of the front seal member 27 and the rear seal member 29 includes a first seal portion 53 that presses the outer insulator 41 from the circumferential direction, and a second seal portion 55 that presses the internal insulator 37 from the circumferential direction. The first seal portion 53 and the second seal portion 55 are each formed as a groove having a semicircular cross section. In a state where the mating surface of the front seal member 27 and the mating surface of the rear seal member 29 are overlapped, the first seal portion 53 is in close contact with the outer peripheral surface of the external insulator 41, and the second seal portion 55 is an internal insulator. It is in close contact with the outer peripheral surface of the body 37. The front seal member 27 has a pair of penetrations for extracting the internal terminal extension 47 and the external terminal extension 51 in the direction intersecting (substantially orthogonal) to the longitudinal direction of the coaxial cable 15, that is, in the insertion direction of the connector 11. A hole 57 is provided. The pair of through holes 57 are formed such that a hole into which the internal terminal extension 47 is inserted and a hole into which the external terminal extension 51 is inserted are separated from each other so as to prevent a short circuit between the terminals. It is configured. The internal terminal extending portion 47 and the external terminal extending portion 51 are inserted into these holes so as to expand the holes, respectively.

  The housing 31 includes a resin main body 59, a metal plate 61 that is insert-molded and held in the main body 59, and a cylindrical shape that protrudes forward in the opposite direction to the main body 59 with respect to the metal plate 61. The first holding part 63 and the second holding part 64 that are arranged coaxially with the first holding part 63, protrude from the inside of the first holding part 63, and protrude forward from the tip part of the first holding part 63. And have. In the housing 31, an opening 65 is formed at the rear of the main body 59. A concave space for accommodating the front seal member 27 and the rear seal member 29 is formed inside the opening 65.

  As shown in FIG. 1, the main body portion 59 of the housing 31 is formed such that a side wall 69 is erected from the outer edge portion of the bottom wall 67 in a substantially square tube shape, and the opening 65 is surrounded by the rear end portions of these side walls 69. Thus, it is formed in a substantially rectangular shape. Adjacent side walls 69 are formed to be connected to each other via curved corners. The main body 59 is provided with an electric wire extraction portion 71 for extracting the coaxial cable 15 to the outside on one of the four side walls 69 (see FIG. 4). The space formed inside the opening 65 (the space in which the front seal member 27 and the rear seal member 29 are accommodated) is the second holding portion 63 in which the internal terminal extension portion 47 and the external terminal extension portion 51 are respectively inserted. The two mounting holes 73 communicate with each other. The first holding portion 63 has a groove portion 75 formed in the circumferential direction of the outer peripheral surface, and an annular packing 77 is attached to the groove portion 75.

  The second holding part 64 is formed in a substantially prismatic shape as a whole, along the guide surface 79 where the internal terminal extension part 47 and the external terminal extension part 51 exposed to the outside through the mounting hole 73 are located on the opposite sides. Each is configured to be guided. The guide surfaces 79 are provided with locking projections 81 protruding from the guide surfaces 79, respectively. The locking protrusion 81 engages with a locking hole 82 provided in each of the internal terminal extending portion 47 and the external terminal extending portion 51, so that the internal terminal extending portion 47 and the external terminal extending portion 51 are respectively engaged with the guide surface 79. It is configured to be stopped. Further, the front end portion of the second holding portion 64 is provided with a protruding portion 83 with which the front ends of the internal terminal extension portion 47 and the external terminal extension portion 51 abut. The protrusion 83 serves as a stopper in the insertion direction of the internal terminal extension 47 and the external terminal extension 51. Thus, the internal terminal extending portion 47 and the external terminal extending portion 51 are engaged with the locking projection 81 and abutted against the protruding portion 83, so that both the front and rear and the axis are positioned, and are substantially cylindrical. The facing posture is maintained.

  The metal plate 61 is held along the bottom wall 67 of the main body 59, and is formed in a step shape corresponding to the bottom wall 67. The metal plate 61 is embedded in the resin at the periphery of the first holding portion 63 of the bottom wall 67 and is held in an exposed state at a position lowered by one step toward the main body portion 59 side. The metal plate 61 protrudes outward (sideward) from both side walls 69 (two side walls 69 adjacent to the side wall 69 on which the wire extraction part 71 is formed) in the left and right width directions of the main body 59, and The portion 59 is formed to protrude outward (upward) from a direction away from the wire extraction portion 71, that is, from the side wall 69 facing the side wall 69 where the wire extraction portion 71 is formed. A through hole 87 through which a bolt 85 (see FIG. 3) as a fastening member is inserted is provided on the surface projecting to the left and right of the metal plate 61, and the surface projecting upward of the main body 59 is directed rearward. A substantially rectangular locking portion 89 that protrudes upward while being curved is provided.

  The shield shell 33 includes a main body portion 91 and a flange portion 93, and is formed by subjecting a conductive metal material to known press processing. The main body 91 is formed with three side walls 97 erected in a U shape from the outer edge of the bottom wall 95, and an accommodating portion 99 for accommodating the main body 59 of the housing 31 is formed inside these side walls 97. Is done. By accommodating the main body portion 59 of the housing 31 in the housing portion 99, the shield shell 33 forms the wire extraction portion 71 among the four side walls 69 of the main body portion 59 while closing the opening 65 of the housing 31. The three side walls 69 excluding the side walls 69 are each attached to the housing 31 so as to cover from the outside.

  The flange portion 93 is provided in front of the main body portion 91 and protrudes in a direction (side) opposite to the housing portion 99 from a pair of side walls 97 facing the housing portion 99 (side walls 97 facing each other), respectively. The pair of side walls 97 are formed so as to protrude in the opposite direction (upward) from the housing portion 99 from the side walls 97 respectively. Fastening holes 101 through which bolts 85 (see FIG. 3) as fastening members are respectively inserted are provided in a pair of surfaces protruding to both sides of the flange portion 93. The fastening hole 101 is formed with the direction (front-rear direction) substantially orthogonal to the mating surface of the front seal member 27 and the rear seal member 29 as the axial direction. An engaging portion 103 is formed on the surface protruding upward of the flange portion 93. The engaging portion 103 is formed with a rectangular opening with which the locking portion 89 is engaged.

  The connector 11 thus configured is covered with the shield shell 33 from the rear of the housing 31, and the metal plate 61 (periphery of the through hole 87) of the connector 11 and the flange portion 93 (periphery of the fastening hole 101) of the shield shell 33. ) Are pressed against each other, the front seal member 27 and the rear seal member 29 are pressed against the housing 31 and the shield shell 33 to be compressed.

  On the other hand, as shown in FIG. 4, the terminal block 13 provided in the electric device is disposed to face the insertion port 19 of the instrument wall 17 and is provided coaxially with the insertion port 19. The terminal block 13 includes a terminal 105 connected to the internal conductor terminal 21 of the connector 11, a terminal 107 connected to the external conductor terminal 23, and a pair of contacts 109a and 109b formed in a hemispherical shape. These are configured by being housed in a resin housing 111. The contact 109a is provided so that the concave surface side is connected to the terminal 105 and the opposite convex surface side presses the internal conductor terminal 21. The contact 109b is provided so that the concave surface side is connected to the terminal 107 and the convex surface side presses the external conductor terminal 23. Thereby, when the connector 11 is inserted into the insertion port 19, the second holding portion 64 of the connector 11 is inserted into the terminal block 13, and the internal conductor terminal 21 held in a state exposed to the second holding portion 64. The external conductor terminal 23 is configured to be electrically connected to the terminals 105 and 107 through the contacts 109a and 109b, respectively.

  Next, a method for assembling the connector 11 according to the first embodiment will be described. Note that the assembly method described below is an example of a method for assembling the connector 11, and a part of the work procedure may be replaced as long as the same connector 11 can be configured.

  First, the coaxial insulator 15 is prepared in which the inner insulator 37 and the outer insulator 41 are separated from each other, and the inner conductor 35 and the outer conductor 39 are sequentially exposed from the tip side. Subsequently, the end portion of the coaxial cable 15 excluding the shield conductor 43 is inserted into the wire extraction portion 71 of the housing 31. At this time, the front seal member 27 is accommodated in the main body 59 of the housing 31 in a positioned state. Further, a packing 77 is attached to the first holding portion 63 of the housing 31 along the groove portion 75.

  Next, the end portion of the coaxial cable 15 passed through the wire extraction portion 71 is inserted into the annular sleeve 25 and the outer conductor connection portion 49 of the outer conductor terminal 23, and the tip portion of the inner conductor 35 is pressed to form a flat plate shape. A connecting portion 113 is formed. The connecting portion 113 is electrically connected to the inner conductor connecting portion 45 by, for example, ultrasonic welding or caulking.

  On the other hand, before and after this, the cylindrical outer conductor connecting portion 49 is positioned between the inner insulator 37 and the outer conductor 39 of the coaxial cable 15, and the outer conductor 39 surrounding the outer conductor connecting portion 49. A cylindrical sleeve 25 is positioned outside. By crimping the sleeve 25 in this manner, the outer conductor 39 is electrically connected in a state of being sandwiched between the outer conductor connecting portion 49 and the sleeve 25.

  Next, the internal terminal extension portion 47 of the internal conductor terminal 21 and the external terminal extension portion 51 of the external conductor terminal 23 are respectively inserted into the through holes 57 of the front seal member 27, and the internal terminal extension portions 47 that have passed through the through holes 57. And the external terminal extension 51 are respectively inserted into the mounting holes 73 of the first holding part 63. The internal terminal extending part 47 and the external terminal extending part 51 inserted into the mounting hole 73 are guided along the guide surface 79 of the second holding part 64 and are exposed to the outside of the housing 31. The internal terminal extending portion 47 and the external terminal extending portion 51 are in contact with the protruding portion 83 of the second holding portion 64, and the locking protrusions 81 are engaged with the respective locking holes 82, whereby the second The holder 64 is positioned.

  Subsequently, the rear seal member 29 is assembled in the space of the main body portion 59 so that the mating surface of the front seal member 27 and the mating surface of the rear seal member 29 face each other. At this time, in the front seal member 27 and the rear seal member 29, the external insulator 41 is positioned between the pair of first seal portions 53, and the internal insulator 37 is positioned between the pair of second seal portions 55. At this time, the rear end surface of the rear seal member 29 is projected from the end surface of the side wall 69 of the main body 59.

  Next, the shield shell 33 is assembled so as to close the opening 65 of the housing 31. Specifically, the locking portion 89 of the housing 31 is inserted into and engaged with the opening of the engaging portion 103 of the shield shell 33, and the shield shell 33 is overlapped so that the main body portion 59 of the housing 31 covers from the three surface directions. Adapted. When the locking portion 89 is engaged with the engaging portion 103 in this manner, the shield shell 33 is temporarily connected to the housing 31 by the engaging portion 103 and is rotated while the engaging portion 103 is used as a fulcrum. Can be assembled.

  Thus, the shield shell 33 is pressed against the housing 31 in a state where the shield shell 33 is temporarily connected to the housing 31, and the lower end portion of the metal plate 61 opposite to the engaging portion 89 and the shield shell 33 are engaged. The tip of the shield conductor 43 that surrounds the coaxial cable 15 is covered so that the joint portion 103 and the lower ends of the three side walls 97 on the opposite side are surrounded. Further, a pair of shield holders 115a and 115b, which are attachment members, are covered so as to surround the tip of the covered shield conductor 43.

  The shield holders 115a and 115b are connected to each other at one end, and a bolt hole 119 into which the bolt 117 is inserted is formed at the other end. Accordingly, the bolt 117 is sequentially passed through the bolt holes 119 of the shield holders 115a and 115b, and the nut 121 is fastened to the bolt 117, so that the shield conductor 43 is securely attached to the metal plate 61 and the shield shell 33 of the housing 31. It can be fixed (see FIG. 2). The housing 31 and the shield shell 33 are fastened and fixed by the pair of shield holders 115a and 115b in a state where the locking portion 89 and the engaging portion 103 are engaged.

  Subsequently, the housing 31 (the first holding portion 63 and the second holding portion 64) of the connector 11 assembled in this way is inserted into the insertion port 19 of the wall 17 of the electric device. A bolt 85 is sequentially passed from the rear of the shield shell 33 to the fastening hole 101 of the shield shell 33 and the bolt hole 87 of the housing 31, and the tip of the bolt 85 is fastened to a bolt hole (not shown) formed in the instrument wall 17. Is done. Thereby, the connector 11 is fixed in a state where the metal plate 61 of the housing 31 is pressed against the instrument wall 17 of the electric device, and the internal terminal extending portion 47 and the external terminal extending portion 51 of the connector 11 are respectively connected to the terminal block 13. It is connected to terminals 105 and 107 via contacts 109a and 109b. That is, the coaxial cable 15 and the electric device are electrically connected.

  Further, when the bolts 85 are fastened to the instrument wall 17 in this way, the metal plate 61 of the housing 31 and the flange portion 93 of the shield shell 33 are in close contact with each other, and the front seal member 27 and the rear seal member 29 are connected to each other. Pressed from the front-rear direction and kept compressed along the mating surface. Further, the external insulator 41 accommodated in the front seal member 27 and the rear seal member 29 is pressed from the circumferential direction by the pair of first seal portions 53, and the internal insulator 37 is paired with the pair of second seal portions 55. Is pressed from the circumferential direction. Thus, the exposed end portions of the inner conductor 35 and the outer conductor 39, the connecting portion between the inner conductor terminal 21 and the inner conductor 35, and the connecting portion between the outer conductor terminal 23 and the outer conductor 39 are respectively connected to the front seal member 27. Sealed by the rear seal member 29.

  In particular, the housing 31 and the shield shell 33 are engaged with the engaging portion 89 and the engaging portion 103 above the front seal member 27 and the rear seal member 29, and the front seal member 27 and the rear seal member 29. Since the metal plate 61 and the flange portion 93 are in close contact with each other in the sandwiched width direction (left-right direction), the front seal member 27 and the rear seal member 29 can be pressed from three locations (three directions). Thereby, since the front seal member 27 and the rear seal member 29 are uniformly pressed along these mating surfaces, a high sealing performance can be ensured and the waterproof performance of the connector 11 can be improved.

  In addition, in the connector 11 of the first embodiment, it is below the part where the metal plate 61 and the flange part 93 are bolted (that is, opposite to the part where the locking part 89 and the engaging part 103 are engaged). ), The shield holders 115 a and 115 b fasten the housing 31 and the shield shell 33. Thereby, since a pair of front seal member 27 and back seal member 29 can be pressed from a wider range, and these can be pressed more uniformly along a mating surface, the waterproofness of connector 11 is raised more. Can do.

  In the connector 11 of the first embodiment, since the packing 77 is attached to the first holding portion 63 of the housing 31 that is inserted into the insertion port 19 of the electric device, the outer peripheral surface of the first holding portion 63 The seal 77 seals the gap between the insertion hole 19 of the electric device and the inner peripheral surface of the electric device, and water and foreign matter can be prevented from entering the connector 11 and the electric device from the outside.

In the connector 11 of the first embodiment, the housing 31 and the shield shell 33 are pressed against each other by the shield holders 115a and 115b, but at least the locking portion 89 and the engaging portion 103 are engaged. In addition, the pair of front seal member 27 and rear seal member 29 can be uniformly pressed along the mating surfaces only by fastening the metal plate 61 and the flange portion 93 with bolts, thereby ensuring a desired sealing property. Can do.
Furthermore, in the connector 11 of the first embodiment, the pair of front seal member 27 and rear seal member 29 can be pressed with only two components, the housing 31 and the shield shell 33, so that the number of components is minimized. Can do. Thereby, the assembly | attachment operation | work of the connector 11 becomes easy and manufacturing cost can be reduced.

  Next, a connector 125 according to a second embodiment to which the waterproof structure of the connector of the present invention is applied will be described with reference to the drawings. The second embodiment differs from the first embodiment in that a multi-core electric wire (electric wire) 123 is used instead of the coaxial electric wire 15, but basically the first embodiment. Since the configuration is common, this difference will be mainly described, and the same or similar configuration as in FIG.

In the second embodiment, the multi-core electric wire refers to a cabtire cable configured by wrapping a plurality of electric wires made of a conductor and an inner insulator surrounding the conductor with an outer insulator (sheath).
In the connector 125 of the second embodiment, the external insulator 127 is peeled to expose the two electric wires 129a and 129b, and the internal insulator 130 is peeled and exposed from the ends of the exposed electric wires 129a and 129b. Each conductor is connected to the first and second conductor terminals 133 and 135, respectively.

  As shown in FIG. 5, the two conductors exposed from the internal insulator 130 each form a connecting portion 131 having a flat tip portion. Among these, the connection part 131 of one conductor is connected to the first conductor terminal 133, and the connection part 131 of the other conductor is connected to the second conductor terminal 135. Each connecting portion 131 is connected to the first conductor terminal 133 and the second conductor terminal 135 by ultrasonic welding or caulking, respectively. The first conductor terminal 133 and the second conductor terminal 135 include a conductor connecting portion 137 formed in a flat plate shape, and a terminal extending portion 139 extending in a crank shape from one end of the conductor connecting portion 137 and extending in a substantially semicylindrical shape. Prepare. The pair of terminal extending portions 139 is the same as the internal terminal extending portion 47 and the external terminal extending portion 51 in FIG.

  The front packing 141 and the rear packing 143, which are a pair of seal members, have seal portions 145 and 147 that press the internal insulators 130 of the two electric wires 129a and 129b from the circumferential direction, respectively. Each of the seal portions 145 and 147 has a groove having a semicircular cross section. Like the front seal member 27 in FIG. 1, the front packing 141 is provided with a through hole 142 for extracting the two terminal extending portions 139.

  Also in the connector 125 of the second embodiment, the locking portion 89 and the engaging portion 103 are engaged, and the metal plate 61 and the flange portion 93 are brought into close contact with each other by bolt fastening, so that the front packing 141 and the rear packing 143 are attached. Can be uniformly pressed along the mating surface. Thereby, high sealing performance can be secured and high waterproofness of the connector 125 can be secured.

  Next, a connector 225 according to a third embodiment to which the waterproof structure of the connector of the present invention is applied will be described with reference to the drawings. The third embodiment is different from the first embodiment in that the front seal member 27A and the rear seal member 29A are used instead of the front seal member 27 and the rear seal member 29. Since the configuration is the same as that of the first embodiment described above, this difference will be mainly described, and the same or similar configuration as in FIG.

  As shown in FIGS. 6A and 6B, the front seal member 27A in the connector 125 of the third embodiment is in close contact with the outer peripheral surface of the external insulator 41 in the coaxial electric wire (electric wire) 15. A relief groove 58 formed on the front end surface corresponding to the first seal portion 53 that presses the external insulator 41 from the circumferential direction is provided. The rear seal member 29 </ b> A is provided with a relief groove 58 formed on the rear end surface that is a portion corresponding to the first seal portion 53.

  These escape grooves 58 are each formed in a semicircular groove shape having the same width as the first seal portion 53, and the front seal member 27 </ b> A and the rear seal member 29 </ b> A are interposed between the housing 31 and the shield shell 33. When housed and compressed, it functions as a relief portion that reduces the compressive force in the direction along the axial direction of the fastening hole 101 (the vertical direction in FIG. 6B).

  According to the connector 225 of the third embodiment, as shown in FIG. 6B, when the front seal member 27A and the rear seal member 29A are accommodated between the housing 31 and the shield shell 33 and compressed. The relief groove formed in the portion corresponding to the first seal portion 53 that presses the outer insulator 41 of the coaxial cable 15 from the circumferential direction (that is, the front end surface of the front seal member 27A and the rear end surface of the rear seal member 29A). 58 reduces the compressive force in the direction along the axial direction of the fastening hole 101. Therefore, stress can be uniformly applied to the outer peripheral surface of the external insulator 41 in the coaxial cable 15 on the first seal portion 53 of the front seal member 27A and the rear seal member 29A.

Therefore, the connector 225 of the third embodiment can minimize the load for fastening the housing 31 and the shield shell 33 to each other, which is necessary for ensuring waterproofness. Increase in size can be prevented.
That is, if the compressive force is concentrated only in the direction along the axial direction of the fastening hole 101 with respect to the first seal portion 53 that presses the coaxial cable 15 from the circumferential direction, the compressive force from other directions becomes small. Therefore, in order to ensure waterproofness, it is necessary to increase the load for fastening the housing 31 and the shield shell 33 to each other so as to ensure the compressive force from other directions. Although there is a possibility of increasing the size of the member, according to the connector 225 of the third embodiment, this can be prevented.

  Next, a connector 325 according to a modification of the connector 225 of the third embodiment will be described with reference to the drawings. In this modification, although the front seal member 27B and the rear seal member 29B are used instead of the front seal member 27A and the rear seal member 29A, they are different from the third embodiment, but basically. Since the configuration is the same as that of the third embodiment described above, this difference will be mainly described, and the configuration that is the same as or similar to that of FIG.

  As shown in FIGS. 7A and 7B, the front seal member 27B and the rear seal member 29B in the connector 325 of this modification are in close contact with the outer peripheral surface of the external insulator 41 in the coaxial cable 15. A first seal portion 53A that presses the external insulator 41 from the circumferential direction is formed.

  As shown in FIG. 7A, the first seal portion 53A is formed with a groove having a semi-elliptical cross section, so that the front seal member 27B and the rear seal member 29B are connected to the housing 31, shield shell 33, and the like. When it is accommodated between and compressed, it functions as an escape portion for reducing the compressive force in the direction along the axial direction of the fastening hole 101 (the vertical direction in FIG. 7B). That is, the first seal portion 53A does not adhere to the outer peripheral surface of the external insulator 41 when the mating surface of the front seal member 27B and the mating surface of the rear seal member 29B are overlapped, and the front seal member 27B and When the rear seal member 29B is accommodated between the housing 31 and the shield shell 33 and compressed, the rear seal member 29B comes into close contact with the outer peripheral surface of the external insulator 41.

  According to the connector 325 of this modified example, when the front seal member 27B and the rear seal member 29B are accommodated between the housing 31 and the shield shell 33 and compressed as shown in FIG. A relief portion formed in a portion corresponding to the first seal portion 53A that presses the outer insulator 41 of the electric wire 15 from the circumferential direction (that is, the inner surface of the first seal portion 53A formed in a semi-elliptical cross section) is a fastening hole. The compressive force in the direction along the axial direction of 101 is reduced. Therefore, the first seal portion 53A of the front seal member 27B and the rear seal member 29B can be uniformly stressed against the outer peripheral surface of the external insulator 41.

  Therefore, the connector 325 of this modification can minimize the load for fastening the housing 31 and the shield shell 33 to each other, which is necessary for ensuring waterproofness, like the connector 225 of the third embodiment. Thickening of the housing 31 and an increase in the size of the bolt 85 can be prevented.

  Next, a connector 425 according to a fourth embodiment to which the waterproof structure of the connector of the present invention is applied will be described with reference to the drawings. The fourth embodiment is different from the first embodiment in that the front seal member 27C and the rear seal member 29C are used instead of the front seal member 27 and the rear seal member 29. Since the configuration is the same as that of the first embodiment described above, this difference will be mainly described, and the same or similar configuration as in FIG.

As shown in FIG. 8 (a), the front seal member 27C and the rear seal member 29C in the connector 425 of the fourth embodiment are formed in a substantially V-shaped cross section so that they are in contact with each other. The surfaces are formed so that the distance from each other increases from the first seal portion 53 toward the outside.
As shown in FIG. 8B, the mating surface is formed so that the front seal member 27 </ b> C and the rear seal member 29 </ b> C are accommodated between the housing 31 and the shield shell 33 and compressed, so that It is comprised so that it may be substantially orthogonal to a direction. A groove 62 for promoting the deformation of the front seal member 27C and the rear seal member 29C extends along the longitudinal direction of the coaxial cable 15 on the front end surface of the front seal member 27C and the rear end surface of the rear seal member 29C. Is provided.

  According to the connector 425 of the fourth embodiment, when the front seal member 27C and the rear seal member 29C are accommodated between the housing 31 and the shield shell 33 and compressed, as shown in FIG. When the front seal member 27C and the rear seal member 29C having a substantially V-shaped cross section are deformed into flat plate shapes so that the mating surfaces come into contact with each other, the first seal portion 53 of the front seal member 27C and the rear seal member 29C has A load is applied in the tangential vertical direction of the external insulator 41 in the coaxial cable 15. That is, when the front seal member 27C and the rear seal member 29C each having a substantially V-shaped cross section are deformed into a flat plate shape, the groove width W of the first seal portion 53 is deformed so as to be reduced. The first seal portion 53 can uniformly apply stress to the outer peripheral surface of the external insulator 41 without the compressive force being concentrated in the direction along the axial direction (the vertical direction in FIG. 8B). .

  Therefore, the connector 425 of the fourth embodiment can minimize the load for fastening the housing 31 and the shield shell 33 to each other, which is necessary for ensuring waterproofness. Increase in size can be prevented.

  As mentioned above, although embodiment of this invention has been explained in full detail with drawing, the said embodiment is only an illustration of this invention and this invention is not limited only to the structure of the said embodiment. Needless to say, changes in design and the like within the scope of the present invention are included in the present invention.

  For example, in the above-described embodiment, the example in which the pair of terminals to which the conductors of the electric wires are connected is coaxially arranged along the insertion direction so as to face each other in a substantially cylindrical shape has been described. The shape and arrangement are not limited to this example, and can be appropriately set according to the configuration of the terminal block 13 and the like.

  Further, in the above embodiment, the example in which the locking portion 89 is inserted into the engaging portion 103 and engaged is described. However, the structure is not limited to this example as long as one structure can be engaged with the other. It is not something that can be done.

  In the above-described embodiment, an example in which two conductors of a coaxial cable and a multi-core cable are connected to terminals is described. However, the connector according to the present invention uses three or more conductors as terminals. It can also be applied when connecting. In this case, what is necessary is just to set suitably the internal shape of a pair of sealing member according to the number and shape of a terminal.

In the above embodiment, the shield shell is covered and directly covered with the opening of the housing, so that the front seal member and the rear seal member are pressed against the housing and the shield shell to be compressed. A resin lid portion is provided separately from the main body portion, and a shield shell covering the housing is configured to compress the front seal member and the rear seal member against the housing via the lid portion. You can also.

  Here, the features of the embodiment of the waterproof structure of the connector according to the present invention described above are summarized and listed in the following [1] to [5], respectively.

[1] Coaxial or multi-core electric wires (coaxial electric wires 15 or multi-core electric wires 123) and conductors exposed by peeling off the insulation coating (internal insulators 37 and 130) of these electric wires (inner conductor 35, outer conductor) 39) a plurality of terminals (inner conductor terminal 21 and outer conductor terminal 23, first conductor terminal 133 and second conductor terminal 135) respectively connected to the exposed end portions of these terminals, and these terminals are exposed to the outside, and A connector (11, 125, 225, 325, 425) comprising a housing (31) for accommodating a connection portion between the terminal and the conductor, and a shield shell (33) covering the housing,
The housing has an opening (65) formed at an end of a side wall (69) erected in a cylindrical shape from an outer edge portion of the bottom wall (67), and is provided in the bottom wall to extract the plurality of terminals. A mounting hole (73) for holding the wire, an electric wire extraction portion (71) provided on the side wall for extracting the electric wire to the outside, and a member that is held along the bottom wall and protrudes in a direction away from the electric wire extraction portion. A metal plate (61) having a stop (89),
The shield shell is attached so as to cover the opening of the housing, and the engaging portion (103) to which the engaging portion is engaged, and a pair of side walls facing the accommodating portion (99) for accommodating the housing A pair of flange portions (93) projecting in the opposite direction from the housing portion from (97), and fastening holes (101) through which fastening members (bolts 85) are respectively inserted are formed in the flange portions. And
Between the housing and the shield shell, a pair of elastic seal members (front seal members 27, 27A, 27B, 27C and rear seal member 29 surrounding the connecting portion and the exposed end portions of the conductors). , 29A, 29B, 29C) are compressed and accommodated, and the mating surface of these sealing members is a waterproof structure for a connector that is substantially orthogonal to the axial direction of the fastening hole.
[2] The connector waterproof structure according to [1], wherein the metal plate (61) is formed with a through hole (87) through which the fastening member passed through the fastening hole is inserted.
[3] The electric wire so as to surround the end portion of the metal plate (61) opposite to the engaging portion and the end portion of the shield shell opposite to the engaging portion. The tip of the cylindrical shield conductor (43) surrounding the
The waterproof structure for a connector according to the above [1] or [2], wherein the distal end portion is held at the end portion by fastening an attachment member (shield holder 115a, 115b) surrounding the distal end portion.
[4] The seal members (front seal members 27A and 27B and rear seal members 29A and 29B) are in close contact with the outer peripheral surface of the electric wires and press the electric wires from the circumferential direction (first seal portions 53 and 53A). ) And a relief portion (relief groove 58) that reduces the compressive force in the direction along the axial direction of the fastening hole is provided, according to any one of the above [1] to [3]. Connector waterproof structure.
[5] The pair of seal members (the front seal member 27C and the rear seal member 29C) are each formed in a substantially V-shaped cross section so that the mating surfaces that are in contact with each other are on the outer peripheral surface of the electric wire. It is formed so as to increase the distance from each other toward the outside from the seal portion (53) that closely contacts and presses the electric wire from the circumferential direction,
The mating surface includes any one of the above [1] to [3], wherein the pair of seal members are accommodated between the housing and the shield shell and compressed, thereby being substantially orthogonal to the axial direction of the fastening hole. The waterproof structure of the connector as described in any one.

  This application is based on a Japanese patent application filed on May 8, 2013 (Japanese Patent Application No. 2013-098116), the contents of which are incorporated herein by reference.

  According to the waterproof structure of the connector according to the present invention, since the sealing performance of the pair of sealing members can be improved, a connector with improved waterproof performance can be provided.

11 Connector 15 Coaxial wire (wire)
21 Internal conductor terminal (terminal)
23 External conductor terminal (terminal)
27 Front seal member (seal member)
29 Rear seal member (seal member)
31 Housing 33 Shield shell 35 Inner conductor (conductor)
37 Internal insulator (insulation coating)
39 External conductor (conductor)
41 External insulator (insulation coating)
43 Shield Conductor 59 Body 61 Metal Plate 63 First Holding Part 64 Second Holding Part 65 Opening 67 Bottom Wall 69 Side Wall 71 Electric Wire Extraction Part 73 Mounting Hole 85 Bolt (Fastening Member)
87 Through-hole 89 Locking part 93 Flange part 97 Side wall 99 Housing part 101 Fastening hole 103 Engagement part 115a, 115b Shield holder (mounting member)
117 bolts

Claims (4)

Coaxial or multi-core electric wires, a plurality of terminals connected to the exposed ends of the conductors exposed by peeling off the insulation coating of these electric wires, and exposing these terminals to the outside, and these terminals A waterproof structure of a connector comprising a housing that accommodates a connecting portion with the conductor, and a shield shell that covers the housing,
The housing includes an opening formed at an end portion of a side wall standing in a cylindrical shape from an outer edge of the bottom wall, a mounting hole provided in the bottom wall for extracting and holding the plurality of terminals, and the side wall An electric wire extraction portion that extracts the electric wire to the outside, and a metal plate that is held along the bottom wall and has a locking portion that protrudes away from the electric wire extraction portion,
The shield shell is attached so as to cover the opening of the housing, the engaging portion to which the locking portion is engaged, and the accommodating portion from a pair of side walls facing the accommodating portion for accommodating the housing, respectively. A pair of flange portions protruding in opposite directions, each of which has a fastening hole through which a fastening member is inserted,
Between the housing and the shield shell, a pair of elastic sealing members surrounding the connecting portion and the exposed end portions of the conductors are compressed and accommodated, and the mating surfaces of these sealing members are Substantially perpendicular to the axial direction of the fastening hole ,
The seal member is formed in a portion corresponding to a seal portion that is in close contact with the outer peripheral surface of the electric wire and presses the electric wire from the circumferential direction, and reduces the compression force in the direction along the axial direction of the fastening hole. Waterproof structure for connectors. Coaxial or multi-core electric wires, a plurality of terminals connected to the exposed ends of the conductors exposed by peeling off the insulation coating of these electric wires, and exposing these terminals to the outside, and these terminals A waterproof structure of a connector comprising a housing that accommodates a connecting portion with the conductor, and a shield shell that covers the housing,
The housing includes an opening formed at an end portion of a side wall standing in a cylindrical shape from an outer edge of the bottom wall, a mounting hole provided in the bottom wall for extracting and holding the plurality of terminals, and the side wall An electric wire extraction portion that extracts the electric wire to the outside, and a metal plate that is held along the bottom wall and has a locking portion that protrudes away from the electric wire extraction portion,
The shield shell is attached so as to cover the opening of the housing, the engaging portion to which the locking portion is engaged, and the accommodating portion from a pair of side walls facing the accommodating portion for accommodating the housing, respectively. A pair of flange portions protruding in opposite directions, each of which has a fastening hole through which a fastening member is inserted,
Between the housing and the shield shell, a pair of elastic sealing members surrounding the connecting portion and the exposed end portions of the conductors are compressed and accommodated, and the mating surfaces of these sealing members are Substantially perpendicular to the axial direction of the fastening hole ,
Each of the pair of seal members is formed in a substantially V-shaped cross section so that the mating surfaces that are in contact with each other are in close contact with the outer peripheral surface of the electric wire and are removed from the seal portion that presses the electric wire from the circumferential direction. Are formed so that the distance between them increases toward
The mating surface is a waterproof structure for a connector that is substantially orthogonal to the axial direction of the fastening hole when the pair of seal members are accommodated and compressed between the housing and the shield shell . The waterproof structure of the connector according to claim 1 or 2 , wherein the metal plate is formed with a through hole through which the fastening member passed through the fastening hole is inserted. The end portion of the metal plate opposite to the engaging portion and the end portion of the shield shell opposite to the engaging portion have a cylindrical shape surrounding the electric wire so as to surround these end portions. The tip of the shield conductor is covered,
The waterproof structure for a connector according to any one of claims 1 to 3 , wherein the distal end portion is held by the end portion by fastening an attachment member surrounding the distal end portion.

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