JP2024041315A - connector - Google Patents

Abstract

A connector is disclosed that can suppress the opening between split retainers and suppress the propagation of an external force applied to an electric wire to a terminal side. [Solution] The connector 10 includes a plurality of terminals 12, a plurality of electric wires 16, and a back retainer 18 made of synthetic resin that is assembled to the connector housing 14 side, the back retainer 18 has split retainers 42a, 42b, each of which has a split protrusion 46 located between the plurality of electric wires 16, and the split retainers 42a, 42b are fixed to each other, so that the split protrusions 46 are combined to form a wire pressing protrusion 48 that is located between the plurality of electric wires 16, the wire pressing protrusion 48 has a first band attachment portion 58, and the plurality of electric wires 16 are bound and fixed to each other in a state where they are in close contact with the wire pressing protrusion 48 by a first binding band 65 that is stretched across the first band attachment portions 58, and the split protrusions 46 press against each other from both sides in the first direction. [Selected Figure] Figure 2

Description

TECHNICAL FIELD This disclosure relates to connectors.

Conventionally, connectors have been used to electrically connect in-vehicle devices. Such a connector includes a connector housing, a terminal housed in the connector housing, and an electric wire connected to the terminal, and the electric wire is drawn out from the electric wire outlet of the connector housing. When the external force applied to the electric wire pulled out to the outside is transmitted to the terminal side, problems such as slight sliding wear on the contacts occur. Therefore, in order to suppress the external force applied to the electric wire from being applied to the terminal side, for example, in Patent Document 1, a back retainer made of resin is provided to hold the electric wire in the connector housing while suppressing the deflection of the electric wire.

JP2022-78600A

However, the back retainer is constructed by combining a pair of split retainers that are assembled to each other with the electric wire sandwiched therebetween in a direction perpendicular to the axis of the electric wire. Therefore, vibrations from the wires are repeatedly transmitted to the back retainer, and due to creep phenomena in high-temperature environments, the split retainers tend to open up from each other, creating a gap between the back retainer and the wires, and vibrations are transmitted to the wires. It is also possible that external force may be applied to the terminal side. In particular, when the diameter of electric wires increases due to the increase in the voltage of in-vehicle components, it was considered that there is a high possibility that gaps will occur.

Therefore, a connector is disclosed which can suppress the spread between the divided retainers and suppress the propagation of external force transmitted to the electric wires to the terminal side.

The connector of the present disclosure includes a plurality of terminals housed in a connector housing, a plurality of electric wires each connected to the plurality of terminals and drawn out in parallel to the outside of the connector housing with a gap therebetween, and the connector. a back retainer made of synthetic resin that is assembled to the connector housing side, the connector housing having a plurality of wire insertion cylinder portions into which the plurality of wires drawn out from the housing are inserted and held in a press-contact state; The back retainer includes a pair of split retainers that are fixed to each other by sandwiching and holding the electric wires from both sides in the direction perpendicular to the axis of each of the electric wires, and the pair of split retainers are attached to the outer peripheral surfaces of the plurality of electric wires. Each has a plurality of grooves that are in close contact with each other, and a dividing protrusion that is located between the plurality of grooves in the parallel direction of the plurality of electric wires and protrudes in the direction in which the plurality of electric wires are pulled out, By fixing the pair of divided retainers to each other, the plurality of electric wire insertion tube parts are partitioned by the plurality of grooves and arranged in parallel, and the divided protrusions are combined to form a plurality of electric wires. A wire holding protrusion is configured to be arranged between the plurality of electric wires that protrudes from the insertion tube and extends in the drawing direction, and the wire holding protrusion contacts the electric wires arranged on both sides in the parallel direction. a pair of electric wire contact surfaces; and a pair of first band attachment parts provided on both end surfaces in a first direction perpendicular to the opposing direction of the pair of electric wire contact surfaces; The plurality of electric wires protruding from the plurality of electric wire insertion cylindrical portions and extending in the drawing direction are connected to the electric wires of a pair of the electric wire holding protrusions of the back retainer by the first binding band spanned between the parts. They are bound and fixed to each other in close contact with the contact surface, and the first binding band contacts the pair of first band attachment parts from both sides in the first direction to form the wire holding protrusion. The divided protrusions of each of the pair of divided retainers are pressed against each other from both sides in the first direction.

According to the connector of the present disclosure, it is possible to suppress the opening between the divided retainers and to suppress the propagation of external force transmitted to the electric wire toward the terminal side.

FIG. 1 is a perspective view showing a connector according to a first embodiment. FIG. 2 is a plan view showing an enlarged main part of the connector shown in FIG. 1. FIG. FIG. 3 is a sectional view taken along line III--III in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is an exploded perspective view of the connector shown in FIG. 1, partially exploded. FIG. 7 is a cross-sectional view showing the connector shown in FIG. 1 with the back retainer removed, and is a view corresponding to FIG. 3. FIG. 8 is a perspective view showing a split retainer constituting the connector shown in FIG. 1. FIG. 9 is a perspective view showing the split retainer shown in FIG. 8 from the bottom side. FIG. 10 is a plan view of the split retainer shown in FIG. 8. FIG. 11 is a front view of the split retainer shown in FIG. 8. FIG. 12 is a perspective view showing the back retainer constituting the connector shown in FIG. 1 from the back side.

<Description of embodiments of the present disclosure>
First, embodiments of the present disclosure will be listed and described.
The connector of the present disclosure includes:
(1) A plurality of terminals housed in a connector housing, a plurality of electric wires connected to the plurality of terminals and drawn out in parallel with each other with a gap between them, and the outside of the connector housing. a back retainer made of synthetic resin and assembled to the connector housing side, the back retainer having a plurality of wire insertion tube portions into which the plurality of wires pulled out from the connector housing are respectively inserted and held in a press-contact state; has a pair of split retainers that sandwich and hold the electric wires from both sides in the direction perpendicular to the axis of each of the electric wires, and are fixed to each other, and the pair of split retainers are in close contact with the outer peripheral surfaces of the plurality of electric wires, respectively. each has a plurality of grooves and a dividing protrusion that is located between the plurality of grooves in the parallel direction of the plurality of electric wires and protrudes in the direction in which the plurality of electric wires are pulled out; By fixing the divided retainers to each other, the plurality of electric wire insertion cylindrical parts are partitioned by the plurality of grooves and arranged in parallel, and the divided protrusions are combined to form the plurality of electric wire insertion cylindrical parts. A wire holding protrusion is arranged between the plurality of electric wires that protrudes from the wire and extends in the drawing direction, and the wire holding protrusion contacts the electric wires arranged on both sides in the parallel direction. a contact surface; and a pair of first band attachment parts provided on both end faces in a first direction perpendicular to the opposing direction of the pair of electric wire contact surfaces, and between the pair of first band attachment parts. The plurality of electric wires protruding from the plurality of electric wire insertion cylindrical parts and extending in the drawing-out direction are connected to the electric wire contact surfaces of the pair of electric wire holding protrusions of the back retainer, respectively, by the first binding band spanning over the electric wires. The pair of wires are tightly bound and fixed to each other, and the first binding band contacts the pair of first band mounting portions from both sides in the first direction, thereby forming the wire holding protrusion. The divided protrusions of each divided retainer are pressed against each other from both sides in the first direction.

According to the connector of the present disclosure, the synthetic resin back retainer is constituted by a pair of split retainers that sandwich and hold the wire from both sides in the direction perpendicular to the axis of the wire and are fixed to each other. , each has a plurality of concave grooves that are in close contact with the outer peripheral surface of the electric wire, and a dividing protrusion that is located between the plurality of concave grooves in the parallel direction of the electric wires and protrudes in the direction in which the plurality of electric wires are pulled out. . By fixing the pair of split retainers to each other, the plurality of wire insertion cylinder parts are divided by the plurality of grooves and arranged in parallel, and the split protrusions are combined to separate the wire insertion cylinder parts from the plurality of wire insertion cylinder parts. A wire holding protrusion is arranged between the plurality of electric wires that protrudes and extends in the drawing direction. Further, wire holding protrusions are provided on a pair of wire contact surfaces that contact the wires arranged on both sides in the parallel direction of the wires, and on both end surfaces in a first direction perpendicular to the opposing direction of the pair of wire contact surfaces. and a pair of first band attachment parts.

By spanning and binding the first binding band between the pair of first band attachment parts, the plurality of electric wires protruding from the plurality of electric wire insertion tube parts and extending in the drawing direction are connected to the electric wire holding protrusion of the back retainer. While in close contact with the pair of wire contact surfaces, the wire holding protrusions can be sandwiched therebetween to bind and fix the wires to each other. As a result, the movement of the plurality of electric wires protruding from the electric wire insertion tube of the back retainer and extending in the drawing direction can be suppressed by bringing them into close contact with the pair of electric wire contact surfaces of the electric wire holding protrusion by the binding force of the first binding band. I can do it. As a result, it is possible to advantageously suppress or prevent the electric wire protruding from the electric wire insertion tube from being displaced by an external force, and it is also possible to advantageously suppress the formation of a gap between the back retainer and the electric wire due to the opening between the split retainers. or can be prevented.

In addition, a first binding band contacts the pair of first band mounting portions from both sides in the first direction, and connects the divided protrusions of the pair of divided retainers constituting the wire holding protrusions to each other in the first direction. Pressing against each other from both sides. As a result, the wire holding protrusion formed by the respective split protrusions of the pair of split retainers can be held in the assembly direction by the binding force of the first binding band, and the gap between the split retainers can be more effectively suppressed. or can be prevented.

As described above, in the connector of the present disclosure, the binding force of the first binding band is used to suppress the movement of the electric wire with respect to the back retainer, and to maintain the divided retainers that constitute the back retainer in a coupled state. , can be achieved simultaneously. As a result, it is possible to provide a connector that can suppress the spread between the divided retainers and suppress the propagation of external force transmitted to the electric wires to the terminal side.

Note that the back retainer only needs to be assembled on the connector housing side; for example, it may be assembled directly on the connector housing, or it may be assembled on the connector housing, such as a metal shield shell that covers the outer surface of the connector housing. It may be indirectly assembled to the connector housing via another member.

In addition, the first band attachment part and the second band attachment part (to be described later) may have any shape as long as they can be attached with a cable tie, and may be in the shape of a gutter, a cylinder or a frame. There may be.

(2) In the above (1), it is preferable that the pair of wire contact surfaces of the wire presser protrusion are constituted by curved surfaces that are convex inward in the opposing direction. By making the pair of wire contact surfaces into curved surfaces that convex inward in their opposing directions, it is possible to secure a wide contact area between the wires and the wire contact surfaces, making it possible to secure a wide contact area between the wires and the wire holder placed between multiple wires. This is because the effect of holding the electric wire by the protrusion can be improved.

(3) In (1) or (2) above, it has a cylindrical wire outlet that is fixed to the connector housing, covers the connector housing, and from which the plurality of electric wires drawn out to the outside of the connector housing are pulled out. The back retainer is fitted into the wire outlet of the shield shell, and the wire outlet of the shield shell is spaced apart from each other in the circumferential direction of the wire outlet. The back retainer has a plurality of engaged portions provided in the first direction, and the back retainer has a first engagement portion that is engaged with the engaged portions, and the back retainer has crushing ribs provided on both sides in the first direction. and a second engaging part that has crushing ribs provided on both sides in the parallel direction and is engaged with the engaged part, and the back retainer is fitted into the wire outlet. In the engaged state, the first engaging portion is pressed against the engaged portion via the crushing ribs on both sides in the first direction, and the second engaging portion is pressed against the engaged portion. It is preferable that they be pressed together via the crushing ribs on both sides in the parallel direction.

A back retainer through which a plurality of electric wires drawn out from the connector housing are inserted and held in a press-contact state is fitted into an electric wire outlet of a metal shield shell fixed to the connector housing. When the back retainer is fitted into the wire outlet, the back retainer is pressed against the engaged portion of the wire outlet on both sides in the first direction (for example, on both upper and lower sides) through crushing ribs. The second engaging portion is press-contacted to the engaged portion of the wire outlet on both sides (for example, both left and right sides) in the parallel direction of the electric wires via crushing ribs. Therefore, even if the back retainer is fitted to the wire outlet of the shield shell with some looseness, the first direction (for example, the vertical direction), which is the two directions perpendicular to the wire outlet direction (axial direction), The first engaging portion and the second engaging portion are pressed against the engaged portion while crushing the crushing ribs in both the parallel directions (for example, the left and right directions). As a result, the crushing rib absorbs the rattling, and the displacement of the back retainer fitted into the wire outlet is suppressed relative to the wire outlet. As a result, the back retainer is made of synthetic resin without increasing the size of the connector housing or back retainer, or making the back retainer made of metal, and the crushing ribs are used to protect the shield shell of the back retainer from vibrations caused when mounted on a vehicle. Displacement can be suppressed. Therefore, it is possible to suppress or prevent external force applied to the electric wire from being transmitted to the terminal side, while suppressing an increase in the size of the connector itself and an increase in manufacturing cost. In addition, it is possible to improve the external force blocking performance of suppressing the transmission of external force from the electric wire by the back retainer. In particular, since the wire outlet into which the back retainer is fitted is constructed using a metal shield shell, compared to the case where the wire outlet is provided in a synthetic resin connector housing, , it is possible to advantageously suppress problems such as the occurrence of gaps due to the creep phenomenon in a high-temperature environment, and advantageously maintain the state of pressure contact between the engaging part and the engaged part via the crushing ribs.

Note that any structure can be adopted as the fitting structure of the back retainer to the wire outlet of the shield shell. For example, an elastic locking piece is provided on the back retainer and is lock-fitted to a lock protrusion provided on the shield shell. You can do it like this.

(4) In (3) above, each of the split retainers has a second band attachment part provided on an end side opposite to the split protrusion in the pull-out direction, and the split retainers are assembled to each other. The back retainer is configured to have a pair of second band attachment parts arranged on both sides in the first direction, and a second binding that is bridged between the pair of second band attachment parts. It is preferable that the pair of divided retainers are pressed against each other from both sides in the first direction by a band, and that the back retainer is bound and fixed to the wire outlet of the shield shell.

The split retainer has a pair of second band mounting parts on the opposite side in the pulling direction from the split protrusion provided with the first band mounting part, and is spanned between the pair of second band mounting parts. The split retainers can be held together in a combined state by the second binding band. As a result, the split retainers can be held together in the assembly direction by the binding force of the second binding band at a portion away from the split protrusion, and it is possible to more advantageously suppress or prevent the split retainers from opening. .

Furthermore, the back retainer can be tied and fixed to the wire outlet of the shield shell by using the binding force of the second binding band. As a result, the gap between the divided retainers can be suppressed, and the propagation of external force transmitted to the electric wire toward the terminal side can be further advantageously suppressed.

(5) In (3) or (4) above, the plurality of engaged parts of the wire outlet are arranged in the first engaged part arranged on both sides of the parallel direction and in the first direction. The back retainer includes a plurality of second engaged parts arranged on both sides of the parallel direction, and a plurality of second engaged parts arranged on both sides of the first direction. and a plurality of the second engaging portions, and when the back retainer is fitted to the wire outlet, the first engaging portions are connected to the first engaged portions on both sides of the parallel direction. The second engaging portion is pressed against the second engaged portion on both sides in the first direction through the crushing ribs on both sides in the parallel direction. Preferably, they are pressed together via ribs.

On both sides of the first direction and the parallel direction, the engaging part can be pressed against the engaged part through the crushing ribs, and the displacement of the back retainer with respect to the shield shell is suppressed more stably, and the force applied to the electric wire is suppressed. This is because it is possible to suppress or prevent external force from being transmitted to the terminal side.

(6) In any one of (1) to (5) above, the diameter dimension of the inner circumferential surface of each of the electric wire insertion cylindrical portions of the back retainer is such that each of the electric wires passing through the inside of the electric wire insertion cylindrical portion The inner circumferential surface of each electric wire insertion tube has a plurality of wire pressing convex portions that protrude radially inwardly from the outer circumferential surface of each electric wire. are provided so as to project apart from each other, and each of the wire pressing convex portions presses the insulating coating constituting the outer circumferential surface of each of the wires inward in the radial direction, so that the wires It is preferable that the wire be inserted into and held in the wire insertion tube portion in a press-contact state.

The diameter of the inner circumferential surface of each electric wire insertion cylinder is larger than the diameter of the outer circumferential surface of each electric wire, and a gap is formed therebetween. Further, a plurality of wire pressing convex portions are provided to be spaced apart from each other. Therefore, the insulation coating that is pressed by the wire pressing convex parts and elastically deformed outward in the radial direction can be absorbed into the gap extending between the respective wire pressing convex parts. Therefore, it is possible to advantageously fix the position of the wire to the wire insertion tube by pressing the insulation coating of the wire pressing convex portion, while reducing the assembly force when assembling the wire insertion tube to the wire, Assembling work efficiency can be improved. Preferably, the plurality of wire pressing convex portions are spaced apart from each other in both the axial direction and the circumferential direction of the wire insertion tube portion. Thereby, the electric wire can be fixed in a wider range by pressing the electric wire pressing convex portion, and the external force blocking performance of suppressing the transmission of external force from the electric wire by the back retainer can be further improved.

(7) In any one of (3) to (5) above, the back retainer has an elastic locking piece that protrudes in a cantilever shape toward the wire outlet of the shield shell, and The lock piece has a fitting hole in the protruding end, and the shield shell has a lock protrusion that protrudes from the outer peripheral surface of the wire outlet, and the shield shell has a lock protrusion that protrudes from the outer peripheral surface of the wire outlet, and the lock piece has a fitting hole in the elastic lock piece of the back retainer. Preferably, the back retainer is fitted into the wire outlet of the shield shell by fitting the lock protrusion of the shield shell. Since it is sufficient to provide an elastic locking piece on the synthetic resin back retainer and forming a locking protrusion on the shield shell, the elastic locking piece can be easily molded, the structure of the shield shell can be simplified, and manufacturing costs can be reduced. I can do it.

(8) In (7) above, the electric wire outlet of the shield shell has a concave lock piece accommodating part that opens on the outer peripheral surface of the electric wire outlet, and the lock piece is provided on the bottom surface of the lock piece accommodating part. It is preferable that a protrusion protrude and that the elastic lock piece of the back retainer is accommodated in the lock piece accommodating portion when the back retainer is fitted to the shield shell.

When the back retainer is fitted to the shield shell, the elastic lock pieces of the back retainer are accommodated in the lock piece accommodating portions of the shield shell, so that it is possible to suppress the elastic lock pieces from protruding toward the outer periphery of the wire outlet. Thereby, interference with other members of the elastic lock piece can be suppressed, and occurrence of unexpected detachment of the back retainer from the wire outlet can be advantageously suppressed. Furthermore, since the lock protrusion of the wire outlet is also provided on the bottom surface of the lock piece accommodating portion, the protrusion of the lock protrusion toward the outer periphery of the wire outlet can be suppressed, thereby suppressing interference with other members. More preferably, the depth dimension of the lock piece accommodating portion is adjusted so that the elastic lock piece does not protrude outward from the outer circumferential surface of the wire outlet.

(9) In (8) above, the wire outlet of the shield shell has a cylindrical end portion located on the pull-out direction side of the electric wire that penetrates in the plate thickness direction and forms an end surface on the pull-out direction side. A plurality of open cutout-shaped engaged portions are provided, and at least one of the engaged portions is provided to open on the bottom surface of the lock piece accommodating portion, and The protruding second engaging portion is provided on the proximal end side of the elastic locking piece and protrudes from the elastic locking piece toward the electric wire side and is press-fitted into the at least one engaged portion. , is preferable.

The engaged part provided at the wire outlet of the shield shell is configured in the shape of a notch that penetrates the cylindrical end in the thickness direction and opens at the end face on the side in which the wire is pulled out. The engaged portion can be provided without any modification. Furthermore, one of the engaged parts is provided as an opening in the bottom surface of the lock piece accommodating part, and the second engaging part press-fitted therein has a protruding shape that projects from the elastic lock piece toward the electric wire side. Because of this, the empty space on the back side of the elastic locking piece is skillfully used to provide space efficiency. As a result, the engaged portion and the second engaging portion to be fitted into the engaged portion can be provided in a space-saving manner without increasing the size of the connector.

(10) In (9) above, the back retainer includes a mounting cylinder part that is fitted into the inner peripheral side of the cylindrical end of the wire outlet, and a protrusion that projects on the outer peripheral surface of the mounting cylinder part. the first engaging portion has a shape such that when the back retainer is fitted to the shield shell, the first engaging portion is attached to the engaged portion without protruding toward the outer circumferential side of the wire outlet. Preferably, it is contained.

A first engaging portion protrudes from the outer circumferential surface of the mounting cylindrical portion of the back retainer that is fitted into the inner circumferential side of the cylindrical end of the electric wire outlet, and the engaged portion extends in the thickness direction of the cylindrical end. The first engaging portion can be accommodated in the portion, and the first engaging portion can be press-fitted into the engaged portion. Therefore, the cylindrical end of the wire outlet can be used to arrange the engaged part and the first engaging part press-fitted therein, thereby saving space without increasing the size of the connector. It is possible to provide an engaged portion and a first engaging portion that is fitted into the engaged portion.

<Details of embodiments of the present disclosure>
Specific examples of the connector of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all changes within the meaning and scope equivalent to the scope of the claims.

<Embodiment 1>
Hereinafter, a connector 10 according to a first embodiment of the present disclosure will be described using FIGS. 1 to 12. The connector 10 includes a terminal 12, and when the connector 10 and a mating connector (not shown) are connected, the terminal 12 of the connector 10 and the mating terminal of the mating connector are electrically connected. It has become. Note that the connector 10 can be arranged in any direction, but in the following, upper means upper side in FIG. 3, lower side means lower side in FIG. 3, and front means left side and rear side in FIG. 2, the left side is the lower side of FIG. 2, and the right side is the upper side of FIG. 2. Furthermore, regarding a plurality of identical members, only some of the members may be labeled with numerals, and the numerals may be omitted for other members.

<Connector 10>
As shown in FIGS. 1 to 4, the connector 10 includes a plurality of terminals 12 (a pair in the first embodiment) housed in the connector housing 14, and a connector housing 14 connected to the plurality of terminals 12, respectively. A plurality of (a pair in the first embodiment) electric wires 16, 16 are drawn out in parallel with each other with a gap between them. The connector 10 also includes a back retainer 18 made of synthetic resin that is assembled to the connector housing 14 side, and the back retainer 18 has a plurality of electric wires 16 drawn out from the connector housing 14 inserted therein in a press-contact state. It has a plurality (a pair in the first embodiment) of wire insertion tube portions 20 that are held together. In the first embodiment, a pair of connector housings 14, 14 are provided, and each terminal 12 is accommodated in each connector housing 14, respectively.

The connector housings 14, the terminals 12, and the electric wires 16 are spaced apart from each other in the left-right direction, and in the first embodiment, the parallel direction of the electric wires 16 is the left-right direction. Further, as will be described later, each electric wire 16 is drawn out backward from each connector housing 14, and the drawing direction of each electric wire 16 is the front-rear direction (particularly the direction from the front to the rear).

Furthermore, in Embodiment 1, the connector 10 is made of metal that is fixed to the connector housing 14, covers the connector housing 14, and has a cylindrical wire outlet 22 from which the plurality of wires 16 drawn out of the connector housing 14 are pulled out. It is equipped with a shield shell 24 made of The back retainer 18 is fitted into the wire outlet 22 of the shield shell 24.

<Terminal 12>
In the first embodiment, the mating terminal (not shown) connected to each terminal 12 is a pin terminal. The structure is not limited, and for example, a structure like the female terminal (10) described in JP-A No. 2021-28899 may be adopted. More specifically, each terminal 12 of Embodiment 1 includes a terminal body 28 having a cylindrical connection portion 26, and a clip spring 30 as an elastic member attached to the tip (front end) of the terminal body 28. It is configured. A wire fixing section 32 to which each electric wire 16 is fixed is provided at the base end (rear end) of each terminal main body 28 .

Each electric wire 16 is a covered electric wire, and is composed of a core wire 34 and an insulating sheath 36 made of synthetic resin that covers substantially the entire length of the core wire 34. Then, the insulation coating 36 is peeled off at the end of each electric wire 16 to expose the core wire 34, and the exposed core wire 34 is fixed to the wire fixing part 32 of each terminal body 28, so that each terminal body 28 and each electric wire 16 are connected. Note that the method of fixing the wire fixing portion 32 and the core wire 34 is not limited, and may be adhesion, welding, or the like, or may be crimping with a crimping piece.

<Connector housing 14>
As shown in FIG. 2, the connector housing 14 has a substantially rectangular cylindrical terminal accommodating portion 38 in which the front end portion of each electric wire 16 and each terminal 12 fixed to the terminal of each electric wire 16 are accommodated. . As described above, in the first embodiment, a pair of connector housings 14, 14 are provided, and each connector housing 14 has a terminal accommodating portion 38, respectively. Each connector housing 14 (each terminal accommodating part 38) is spaced apart from each other in the left-right direction and extends in the front-back direction. Each electric wire 16 accommodated in each terminal accommodating part 38 is drawn out to the external space through the rear opening 40 of each connector housing 14 (each terminal accommodating part 38). That is, each electric wire 16 is drawn out from each connector housing 14 toward the rear, and the drawing direction of each electric wire 16 is the front-rear direction (particularly the direction from the front to the rear).

Note that the method of fixing each of these connector housings 14 and the shield shell 24 that is fixed while covering each connector housing 14 is not limited, but in the first embodiment, as will be described later, each connector housing 14 is is inserted into the shield shell 24 from the rear opening (wire outlet 22). For example, each connector housing 14 is fixed to the shield shell 24 by fitting the projections and depressions provided on the outer surface of each connector housing 14 and the inner surface of the shield shell 24.

<Back retainer 18>
As also shown in FIG. 12, the back retainer 18 is a pair of split retainers that sandwich and hold each electric wire 16 from both sides in the direction perpendicular to the axis of each electric wire 16 (in the first embodiment, both sides in the vertical direction) and are fixed to each other. 42a and 42b. In particular, in the first embodiment, the pair of split retainers 42a and 42b have the same shape, and the back retainer 18 is constructed by assembling the pair of split retainers 42a and 42b that are upside down. There is. Hereinafter, referring to FIGS. 8 to 11, one (upper) divided retainer 42a will be described, and a description of the other (lower) divided retainer 42b will be omitted.

<Split retainers 42a, 42b>
The split retainer 42a has a plurality of (a pair in the first embodiment) concave grooves 44, 44 that are in close contact with the outer circumferential surface of each electric wire 16 (the outer circumferential surface of each insulating coating 36), and a plurality of concave grooves 44, 44 in a parallel direction (left-right direction) of the plurality of electric wires 16. ) is located between the plurality of concave grooves 44, 44, and has a dividing protrusion 46 that protrudes in the drawing direction (rearward) of the plurality of electric wires 16. By fixing the pair of divided retainers 42a and 42b to each other, the wire insertion tube portion 20 is divided by the upper and lower grooves 44, and the plurality (pairs) of the wire insertion tube portions 20, 20 are arranged on the left and right sides. are arranged in parallel in the direction. Further, by fixing the pair of divided retainers 42a and 42b to each other, the upper and lower divided protrusions 46 constitute a wire holding protrusion 48, and this wire holding protrusion 48 is connected to each electric wire insertion tube. The electric wires 16 are arranged between the electric wires 16 extending in the drawing direction (rearward) from the electric wires 20 in the left-right direction.

More specifically, the divided retainer 42a includes a divided cylindrical portion 50 forming each groove 44, and the pair of divided cylindrical portions 50, 50 are provided spaced apart from each other in the left-right direction. By fixing the pair of divided retainers 42a and 42b to each other, each electric wire insertion tube portion 20 is configured by the upper and lower divided tube portions 50. In the first embodiment, the rear portions of the pair of divided cylinder portions 50, 50 provided on both left and right sides have different circumferential lengths. That is, as shown in FIG. 4, in the upper divided retainer 42a, the divided cylinder part 50 provided on the left side is formed with a circumferential length shorter than 1/2 circumference, and the divided cylinder part 50 provided on the right side is formed with a circumferential length shorter than 1/2 circumference. The portion 50 is formed with a length in the circumferential direction that is approximately 1/2 circumference or slightly longer than 1/2 circumference. As a result, when each electric wire insertion cylinder part 20 is constructed by overlapping the upper and lower divided cylinder parts 50, there is a space between the upper and lower divided cylinder parts 50 in the circumferential direction in the rear part of each electric wire insertion cylinder part 20. , a gap 52 extending in the front-rear direction is formed.

Further, in the divided retainer 42a, the left and right divided cylinder parts 50 are connected by a connecting part 54. As mentioned above, since the dividing protrusion 46 is provided between the left and right grooves 44 (each divided cylinder part 50), the dividing protrusion 46 is provided in the connecting part 54, and the dividing protrusion 46 protrudes to the rear of each divided cylinder portion 50. In the upper divided retainer 42a, the lower surface of the connecting portion 54 is a flat surface, and by fixing the upper and lower divided retainers 42a and 42b to each other, the flat surfaces of the connecting portion 54 are overlapped with each other. Note that each of the left and right divided cylinder portions 50 and the connecting portion 54 may be provided with a hollowed out portion at an appropriate position.

Furthermore, the circumferential length of the front portion of the pair of divided cylinder portions 50, 50 provided on both the left and right sides is approximately 1/2 circumference. Thereby, when each electric wire insertion cylinder part 20 is constructed by overlapping each of the upper and lower divided cylinder parts 50, the front part of each electric wire insertion cylinder part 20 becomes approximately cylindrical. In the first embodiment, the diameter dimension φα (see FIG. 4) of the inner circumferential surface of each wire insertion tube portion 20 composed of the upper and lower divided tube portions 50 (each groove 44) is the same as that of each wire insertion tube portion 20. The diameter dimension φβ (see FIG. 4) of the outer circumferential surface of each electric wire 16 passing through the inside is made larger.

<Wire holding protrusion 48>
The wire holding protrusion 48, which is formed by overlapping the divided protrusions 46, has a pair of wire contact surfaces 56, 56 that are arranged on both sides in the parallel direction (horizontal direction) of the respective electric wires 16 and contact each electric wire 16. (See Figure 5). In Embodiment 1, each wire contact surface 56 is constituted by a curved surface that is convex inward in the opposing direction (horizontal direction), and the vertical center of each wire contact surface 56 is the innermost in the left and right direction. protrudes towards the side. Further, the wire holding protrusion 48 has a pair of first band attachment portions 58, 58 on both end surfaces in a first direction, that is, in an up-down direction, orthogonal to the opposing direction (left-right direction) of the pair of wire contact surfaces 56, 56. have. In the first embodiment, the curvature of each wire contact surface 56 is approximately equal to the curvature of the outer peripheral surface of each wire 16 (the outer peripheral surface of each insulating coating 36), and each wire contact surface 56 is approximately equal to the curvature of the outer peripheral surface of each wire 16. It has a curved surface shape that substantially corresponds to the surface. Thereby, when each electric wire contact surface 56 comes into close contact with the outer peripheral surface of each electric wire 16, each electric wire contact surface 56 comes into close contact with the outer peripheral surface of each electric wire 16 over substantially the entire surface.

Since the electric wire holding protrusion 48 is divided into the respective divided protrusions 46 in the vertical direction, each electric wire contact surface 56 is also divided in the vertical direction, and as shown in FIGS. 5, 12, etc. A divided contact surface 60 that constitutes each electric wire contact surface 56 is provided on both sides of each divided protrusion 46 in the left-right direction. That is, in the upper split retainer 42a, split contact surfaces 60 are provided on both left and right outer surfaces of the lower end portion of the split protrusion 46, and the split contact surfaces 60 gradually curve outward in the left-right direction as they move upward. The upper and lower divided retainers 42a and 42b are overlapped and the divided contact surfaces 60 and 60 are vertically inverted, and the divided contact surfaces 60 and 60 are continuous in the vertical direction, so that the vertical center of each electric wire protrudes most inward in the left and right direction. A contact surface 56 is configured.

<First band attachment part 58>
Further, a first band mounting portion 58 is formed on the upper end surface of the divided protrusion 46 in the upper divided retainer 42a. In the first embodiment, the first band attachment part 58 has a gutter shape extending in the left-right direction, and the first band attachment part 58 has a flat surface 62 configured by the upper end surface of the divided protrusion 46 and extending the entire length in the left-right direction; It is comprised of both side edge parts 64, 64 which protrude upward from the flat surface 62 on both sides of the flat surface 62 in the front-back direction. In this way, by forming the first band attachment part 58 on the upper end surface of the divided protrusion 46 in the divided retainer 42a, the wire holding protrusion 48 is formed by overlapping the upper and lower divided protrusions 46, 46. A pair of first band attachment parts 58, 58 are provided on both end faces in the vertical direction.

<First cable tie 65>
The first binding band 65 spanned between each of the first band attachment parts 58 allows each electric wire 16 that protrudes from each electric wire insertion tube part 20 and extends rearward to the electric wire holding protrusion on the back retainer 18. 48 are bound and fixed to each other in close contact with each wire contact surface 56. In addition, a first binding band 65 is in contact with each first band attachment portion 58 from both sides in the vertical direction, and the respective divided protrusions 46 in the upper and lower divided retainers 42a and 42b forming the wire holding protrusion 48 are connected vertically to each other. Pressing against each other from both sides of the direction. In short, the first binding band 65 is inserted into each of the first band attachment parts 58 each having a substantially gutter shape, and the vertically both sides of the first binding band 65 are the both side edges of each of the first band attachment parts 58. It is inserted between the portions 64 and overlapped with the flat surface 62. This prevents the first binding band 65 from falling off from each first band attachment part 58.

Further, as shown in FIG. 5, the left and right side portions of the first binding band 65 are closely overlapped with the left and right outer portions of the outer peripheral surface of each electric wire 16 (the outer peripheral surface of each insulation coating 36) from the outside. are doing. That is, each electric wire 16 is in close contact with the wire presser protrusion 48 and the first binding band 65 on both sides in the left and right direction, and is held between the wire presser protrusion 48 and the first binding band 65. In the first embodiment, the vertical dimension γ (see FIG. 5) of the wire holding protrusion 48 is made slightly larger than the diameter dimension φβ of the outer peripheral surface of each wire 16, so that when the wire is tied and fixed by the first binding band 65, , the possibility that the vertically opposite side portions of the first binding band 65 are lifted off the respective flat surfaces 62 of the respective first band mounting portions 58 is reduced. As a result, the upper and lower divided tube parts 50 and 50 of the upper and lower divided retainers 42a and 42b are displaced in a direction in which they open (separate) from each other by the first binding band 65, and each electric wire insertion tube part 20 and each electric wire 16 This prevents a gap from forming between the two. Note that the first binding band 65 is made of, for example, synthetic resin, and a conventionally known binding band may be employed.

<Wire pressing protrusion 66>
As shown in FIGS. 4 and 9, a plurality of wire pressing convex portions 66 that protrude inward in the radial direction are formed on the inner circumferential surface of each of the left and right divided cylinder portions 50 of the divided retainer 42a. There is. In each divided cylindrical portion 50, the plurality of wire pressing convex portions 66 are spaced apart from each other in the circumferential direction on the same circumference. Further, a plurality of wire pressing convex portions 66 are arranged at two locations in the front-rear direction so as to be spaced apart from each other in the circumferential direction on the same circumference. The plurality of wire pressing convex portions 66 provided on each of the left and right divided tube portions 50 are located at substantially equal positions in the front and back direction. Therefore, when each electric wire insertion cylinder part 20 is constructed by overlapping each divided cylinder part 50 in the vertical direction, it is possible to cover approximately the entire circumference on the same circumference in each electric wire insertion cylinder part 20 having a substantially cylindrical shape. The plurality of wire pressing convex portions 66 are arranged so as to be spaced apart from each other in the circumferential direction.

As shown in FIG. 4, the plurality of wire pressing convex portions 66 protrude inward in the radial direction from the outer circumferential surface of each wire 16 in a state where each wire 16 is inserted into each wire insertion cylinder portion 20. As a result, the insulation coating 36 forming the outer peripheral surface of each electric wire 16 is pressed radially inward by each electric wire pressing convex portion 66. As a result, each electric wire 16 is inserted into and held in pressure contact with each electric wire insertion tube portion 20. In the first embodiment, as will be described later, after the back retainer 18 is attached to each electric wire 16, the back retainer 18 is moved forward and assembled to the shield shell 24, so that each electric wire 16 is The back retainer 18 can be displaced in the front-back direction with respect to each electric wire 16 while pressing the insulation coating 36.

In addition, in the split retainer 42a, a locking claw portion 68 protruding downward is provided on the outer circumferential surface of the rear portion of one (left side in the first embodiment) of the split cylinder portion 50, and the other (left in the first embodiment) is provided with a lock claw portion 68 that projects downward. A lock frame 70 that protrudes toward the outer circumference is provided on the outer circumferential surface of the divided cylinder portion 50 (right side). As a result, when the upper and lower divided retainers 42a and 42b are overlapped to form each electric wire insertion tube section 20, each lock claw section 68 and/or each lock frame 70 is elastically deformed and engaged. As a result, separation of each divided cylindrical portion 50 is prevented, and each wire insertion cylindrical portion 20 is maintained in a substantially cylindrical shape.

A base portion 72 is provided at the front portion of the split retainer 42a. That is, the base portion 72 is formed by a portion whose circumferential length is approximately 1/2 of a circumference in the front portion of each of the left and right divided tube portions 50 and a front portion of the connecting portion 54 provided between each of these divided tube portions 50. is configured. In other words, each of the left and right divided cylinder parts 50 and the connecting part 54 protrude rearward from the base part 72. The base portion 72 has a predetermined thickness dimension (front-back dimension), and has a generally rectangular shape when viewed in the front-back direction as shown in FIG. The area where it is formed is recessed in a roughly semicircular shape.

Note that when the back retainer 18 is constructed by assembling the upper and lower divided retainers 42a and 42b, one base portion 72 and the other base portion 72 that is vertically inverted are overlapped in the vertical direction. As shown in FIG. 3, the pair of base parts 72, 72 are overlapped in the vertical direction, so that the mounting tube is fitted into the inner peripheral side of the cylindrical end part 128, which will be described later, in the wire outlet 22. A section 74 is configured. That is, in a state in which the back retainer 18 is assembled to the shield shell 24 to form the connector 10, the mounting cylinder portion 74 is fitted into the cylindrical end portion 128.

Further, in the split retainer 42a, a plurality of ribs 76 extending rearward from the base portion 72 are provided on the upper surface of each of the left and right split cylinder portions 50 and the connecting portion 54, and these ribs 76 mutually interact in the left and right direction. are separated by These ribs 76 each have a substantially triangular shape or a substantially trapezoidal shape when viewed in the left-right direction, and have portions whose vertical dimension gradually decreases from the front to the rear. These ribs 76 reinforce the left and right divided tube portions 50 and the connecting portion 54, respectively.

In particular, since the vertical dimension of the front portion of each rib 76 is larger than that of the rear portion, when the back retainer 18 is fitted into the wire outlet 22 of the shield shell 24, The reinforcing effect is relatively strong in the nearby portions, and displacement of each electric wire 16 inserted into each electric wire insertion cylinder portion 20 near the electric wire outlet 22 is prevented. On the other hand, by making the vertical dimension of the rear portion of each rib 76 smaller than that of the front portion, elastic deformation of the left and right divided tube portions 50 is allowed to some extent, and each divided tube portion 50 is On the other hand, the possibility that each electric wire 16 will be damaged when the electric wire 16 is largely displaced is reduced.

<Elastic lock piece 78>
An elastic lock piece 78 is provided at the upper end of the base portion 72 and projects forward, that is, toward the wire outlet 22 of the shield shell 24 in a cantilever shape. It is said to be able to be elastically deformed in the vertical direction. The split retainer 42a is provided with a pair of elastic locking pieces 78, 78, and the elastic locking pieces 78 are spaced apart from each other in the left-right direction. Specifically, each elastic locking piece 78 is provided at a position corresponding to each of the left and right divided cylinder portions 50, respectively. Furthermore, a substantially rectangular fitting hole 80 is provided in the protruding end portion (front end portion) of each of these elastic locking pieces 78, passing through the elastic locking piece 78 in the vertical direction. In the split retainer 42a, a second band attachment part 82 to which a second binding band 87, which will be described later, is attached is provided at the protruding base end (rear end) of the upper end surface of each elastic lock piece 78. .

<Second band attachment part 82>
Each second band attachment part 82 has a gutter shape extending in the left-right direction similarly to the first band attachment part 58 described above, and each second band attachment part 82 is configured by the upper end surface of each elastic lock piece 78. It is comprised of a flat surface 84 extending the entire length in the left-right direction, and both side edges 86, 86 projecting upward from the flat surface 84 on both sides of the flat surface 84 in the front-rear direction. That is, in the divided retainer 42a, each second band attachment part 82 is provided on the end side (front end side) opposite to the divided protrusion 46 in the drawing direction (front-back direction) of each electric wire 16. By forming each second band attachment part 82 on the upper end surface of each elastic lock piece 78 in the split retainer 42a, the first direction of the back retainer 18 configured by overlapping the upper and lower split retainers 42a and 42b Second band mounting portions 82, 82 are provided on both end faces (in the vertical direction).

<Second cable tie 87>
The upper and lower split retainers 42a and 42b are pressed against each other from both sides of the upper and lower sides by the second binding band 87 stretched between the second band attachment parts 82, and the back retainer 18 is attached to the shield shell 24. The wires are bundled and fixed to the wire outlet 22. In short, the second binding band 87 is inserted into each of the second band attachment parts 82 each having a substantially gutter shape, and the vertically both sides of the second binding band 87 are the edges of each of the second band attachment parts 82. It is inserted between the portions 86 and overlapped with the flat surface 84. This prevents the second binding band 87 from falling off from each second band attachment part 82.

Further, as shown in FIG. 3, the left and right side portions of the second binding band 87 are overlapped from the outside with the left and right outer portions of the outer circumferential surface of the cylindrical end portion 128, which will be described later, of the shield shell 24, and are closely attached. ing. In the first embodiment, the fitting portion between the back retainer 18 and the shield shell 24, that is, the fitting portion between the first engaging portion 104 and the first engaged portion 132, which will be described later, and the fitting portion between the second engaging portion 108 and the first engaged portion 132 are described below. A second binding band 87 is provided so as to cover the engagement portion with the second engaged portion 134 from the outside. This reduces the possibility that, for example, vibration transmitted from the outside through each electric wire 16 will be transmitted to the back retainer 18 and the back retainer 18 and the shield shell 24 will be disengaged from each other. Note that the second binding band 87 is made of, for example, synthetic resin, and a conventionally known binding band may be employed.

Furthermore, in each elastic locking piece 78 , a pair of front protrusions 88 , 88 are provided at the front end of each second band attachment part 82 and are spaced apart from each other in the left-right direction and protrude forward. It has a connecting part 90 that connects the protruding tip part (front end part) of. A fitting hole 80 is defined by a region surrounded by each of the second band attachment parts 82, each of the front protrusions 88, and the connecting part 90. Further, as shown in FIGS. 3 and 11, at the protruding base end (rear end) of each elastic locking piece 78 in the split retainer 42a, there is a pair of locking pieces extending downward along the front surface of the base part 72. Lower extending portions 92, 92 are provided spaced apart from each other in the left-right direction. As shown in FIGS. 3 and 11, crushing ribs 106 of a second engaging portion 108, which will be described later, are provided on the outer surfaces in the left-right direction of the downwardly extending portions 92 that are spaced apart from each other in the left-right direction. . In addition, in FIG. 3, each crushing rib 102, 106 before deformation is shown by a two-dot chain line.

Further, in the split retainer 42a, an elastic lock frame 94 that projects downward is provided on the left end surface of the base portion 72, and a lock claw portion 96 that projects rightward is provided on the right end surface. There is. The elastic lock frame 94 can be elastically deformed in the left-right direction, and by engaging the elastic lock frame 94 and the lock claw portion 96 with the divided retainers 42a and 42b facing each other in the vertical direction, the back retainer 18 is now configured. That is, in addition to the engagement between the lock claw part 68 and the lock frame body 70, the elastic lock frame body 94 and the lock claw part 96 are engaged with each other, thereby preventing the upper and lower divided retainers 42a and 42b from being separated. , a back retainer 18 is configured.

The elastic lock frame 94 includes a pair of downward protrusions 98, 98 that are spaced apart from each other in the front-rear direction and protrude downward from the base portion 72, and a protruding tip (lower end) of each of these downward protrusions 98. It has a connecting part 100 to be connected. The lock claw portion 96 is adapted to be engaged with a region surrounded by each of the downward protrusions 98 and the connecting portion 100.

<First engaging portion 104 and second engaging portion 108>
Here, the back retainer 18 has crushing ribs 102, 102 provided on both sides in the first direction (vertical direction) and is a first engaged portion that constitutes an engaged portion 130, which will be described later, in the shield shell 24. 132, and a first engaging portion 104 having crushing ribs 106, 106 provided on both sides in the parallel direction (horizontal direction) of each electric wire 16, and forming an engaged portion 130, which will be described later. The second engaging portion 108 is engaged with the second engaged portion 134. As will be described later, in the wire outlet 22 of the shield shell 24, the plurality of first engaged parts 132 are arranged on both sides in the left-right direction, and the plurality of second engaged parts 134 are arranged on both sides in the vertical direction. It is located in Therefore, in the back retainer 18, a plurality of first engaging portions 104 are arranged on both sides in the left-right direction, and a plurality of second engaging portions 108 are arranged on both sides in the up-down direction.

Specifically, in the split retainer 42a, the first engaging portion 104 is formed in a protruding shape that protrudes toward the outer circumferential side (left side) from the outer circumferential surface of the elastic lock frame 94 provided at the left end. That is, vertical wall portions 110, 110 that protrude to the left and widen in the vertical direction are provided at vertical intermediate portions of a pair of downwardly protruding portions 98, 98 that are spaced apart in the front-back direction in the elastic lock frame 94. Further, the protruding tips (left ends) of each vertical wall portion 110 are connected by a connecting wall portion 112. As shown in FIGS. 8 and 10, the area surrounded by each vertical wall portion 110 and connecting wall portion 112 forms a substantially rectangular through hole 114 that penetrates in the vertical direction. The first engaging portion 104 includes each vertical wall portion 110 and the connecting wall portion 112, and the first engaging portion 104 is configured to include each vertical wall portion 110 and the connecting wall portion 112. ) are provided with protruding crushing ribs 102, 102 on both sides. By assembling the upper and lower divided retainers 42a and 42b having such a shape to each other in the vertical direction, first engaging portions 104 are provided on both sides of the back retainer 18 in the left and right direction, respectively. Furthermore, since the first engaging portion 104 is provided to protrude from the outer circumferential surface of the elastic lock frame 94 constituting the base portion 72, the first engaging portion 104 is also provided in the mounting cylinder portion 74 consisting of the pair of base portions 72, 72. , is provided so as to protrude from its outer peripheral surface.

In the separate state of the split retainer 42a before the first engaging part 104 is engaged with the first engaged part 132, which will be described later, the vertical dimension A between the protruding tips of the crushing ribs 102 (see FIG. 11) is , is larger than the vertical dimension C (see FIG. 7) of the first engaged portion 132, which will be described later. As a result, when the back retainer 18 is fitted into the wire outlet 22 and each first engaging part 104 is fitted into each first engaged part 132, each first engaged part 132, each of the first engaging portions 104 is pressed into contact with the crushing ribs 102 on both sides in the first direction (vertical direction). Moreover, when each first engaging part 104 is fitted into each first engaged part 132, each first engaging part 104 does not protrude to the outer peripheral side of the wire outlet 22. It is adapted to be accommodated in each first engaged portion 132 .

Further, as described above, in the split retainer 42a, the crushing ribs 106, 106 of the second engaging portion 108 are provided on the outer surface in the left-right direction of each downwardly extending portion 92 extending downwardly from each elastic locking piece 78. ing. Specifically, each crushing rib 106 is provided at the upper end portion of each downwardly extending portion 92, and each second engaging portion 108 includes the upper end portion of each downwardly extending portion 92. That is, on the base end side (rear side) of each elastic lock piece 78 of the back retainer 18 (divided retainer 42a), each downward extending portion projects from each elastic lock piece 78 toward each electric wire 16 side (lower side). 92, each of the protruding second engaging portions 108 is configured. By assembling the upper and lower divided retainers 42a and 42b having such a shape to each other in the vertical direction, second engaging portions 108 are provided on both sides of the back retainer 18 in the first direction (vertical direction). There is.

In the separate state of the split retainer 42a before the second engaging portion 108 is engaged with the second engaged portion 134 (described later), the left-right dimension B (see FIG. 11) between the protruding tips of the crushing ribs 106 is , is larger than the left-right dimension D (see FIG. 7) of the second engaged portion 134. As a result, when the back retainer 18 is fitted into the wire outlet 22 and each second engaging part 108 is fitted into each second engaged part 134, each second engaged part 108 is fitted into each second engaged part 134. 134, each of the second engaging portions 108 is pressed into contact with the crushing ribs 106 on both sides in the left-right direction. As shown in FIG. 3, a space is provided between each downward extending portion 92 in the left and right direction, and when each crushing rib 106 is pressed against each second engaged portion 134, , each downwardly extending portion 92 may be able to slightly elastically deform inward in the opposing direction.

By forming the divided retainer 42a in such a shape, the mold for molding can be removed in the vertical direction when molding the divided retainer 42a. As a result, the number of types of molds does not increase, and an increase in cost can be avoided. Furthermore, by making the upper and lower divided retainers 42a and 42b the same shape, an increase in the number of types of parts can be suppressed, and costs can be reduced. Note that the upper and lower divided retainers do not necessarily have to have the same shape.

<Shield shell 24>
The shield shell 24 has a substantially cylindrical shape that opens forward as a whole, and covers substantially the entire pair of connector housings 14 , 14 . That is, the shield shell 24 includes an upper wall part 116 that covers the upper part of each connector housing 14, a lower wall part 118 that covers the lower part of each connector housing 14, and a left wall part 120 that covers the left connector housing 14 from the left. , a right wall portion 122 that covers the right connector housing 14 from the right, and a front wall portion 124 that covers the front of each connector housing 14. Further, inside the shield shell 24, a partition portion 126 is provided that partitions the internal space of the shield shell 24 in the left and right direction between each connector housing 14 (each terminal accommodating portion 38) in the left and right direction.

Although the partition portion 126 extends rearward from the front wall portion 124 of the shield shell 24, it is formed with a dimension in the front-rear direction that does not reach the rear opening of the shield shell 24. As a result, the rear opening of the shield shell 24 is surrounded on all sides by the upper wall 116, the lower wall 118, the left wall 120, and the right wall 122, as shown in FIGS. 3 and 7. It has a substantially rectangular cylinder shape. Each electric wire 16 pulled out rearward through the rear opening 40 of each connector housing 14 is pulled out to the outside of the shield shell 24 through the rear opening of the shield shell 24, which has a substantially rectangular cylindrical shape. The rear opening of the shell 24 defines a cylindrical wire outlet 22 .

In particular, a cylindrical end portion 128 is formed at the rear end of the wire outlet 22 of the shield shell 24 in the direction in which each electric wire 16 is drawn out. That is, the cylindrical end portion 128 is a substantially cylindrical portion surrounded by the upper wall portion 116, the lower wall portion 118, the left wall portion 120, and the right wall portion 122 as described above, and the upper wall portion 116 A substantially flat portion is provided at the middle portion of the lower wall portion 118 in the left-right direction and the middle portion of the left wall portion 120 and the right wall portion 122 in the vertical direction. Further, in the cylindrical end portion 128, the upper wall portion 116 and the lower wall portion 118 are connected to the left wall portion 120 and the right wall portion 122 at both end portions in the left and right direction, and these connecting portions It is made up of curved parts with rounded corners.

<Engaged portion 130>
Here, the wire outlet 22 of the shield shell 24 is provided with a plurality of engaged portions 130 that are spaced apart from each other in the circumferential direction of the wire outlet 22 . Specifically, in the cylindrical end portion 128 of the wire outlet 22, a plurality of notch-shaped engaged parts are formed, which penetrate in the plate thickness direction and open at the end surface on the withdrawal direction side (rear side) of each electric wire 16. A section 130 is provided. More specifically, the plurality of engaged portions 130 are arranged in the cylindrical end portion 128 in a first direction (vertical direction in the first embodiment) perpendicular to the drawing direction (front-back direction) of each electric wire 16 and in a first direction (up-down direction in the first embodiment). The electric wires 16 are provided on both sides in the parallel direction (in the first embodiment, the left-right direction) that is orthogonal to both the extending direction and the first direction. That is, the engaged portion 130 includes a plurality of first engaged portions 132 disposed on both sides in the left-right direction and a plurality of second engaged portions 132 disposed on both sides in the vertical direction in the cylindrical end portion 128. 134. In short, as shown in FIG. 7, the first engaged portion 132 is provided in the left wall portion 120 and the right wall portion 122 constituting the cylindrical end portion 128, and the cylindrical end A second engaged portion 134 is provided in each of the upper wall portion 116 and the lower wall portion 118 that constitute the portion 128 .

Each of the first engaged portions 132 is provided at an intermediate portion in the vertical direction of the left wall portion 120 and the right wall portion 122 that form the cylindrical end portion 128 and spreads substantially flatly. It opens at the rear end surface and penetrates in the left and right direction, which is the thickness direction. Each of these first engaged portions 132 has a predetermined vertical dimension C (see FIG. 7).

Each of the second engaged portions 134 is provided at a substantially flat intermediate portion in the left-right direction of the upper wall portion 116 and the lower wall portion 118 that constitute the cylindrical end portion 128, and in the first embodiment, the upper wall portion 116 and the lower wall portion 118, a pair of second engaged portions 134, 134 are provided spaced apart from each other in the left-right direction. Each second engaged portion 134 opens at the rear end surface of the cylindrical end portion 128 and penetrates in the vertical direction, which is the plate thickness direction, and has a predetermined left-right dimension D (see FIG. 7). There is.

<Lock piece housing section 136>
In particular, in the first embodiment, a concave lock piece accommodating portion 136 for accommodating each elastic lock piece 78 in the back retainer 18 is provided on the outer circumferential surface of the wire outlet 22 in the shield shell 24 and opens toward the outer circumferential side and rearward. It is being Specifically, in each of the upper wall portion 116 and the lower wall portion 118 that constitute the wire outlet 22 (cylindrical end portion 128), a pair of lock piece accommodating portions 136, 136 are provided so as to be spaced apart from each other in the left-right direction and open upwardly and backwardly on the outer peripheral side. Each of the second engaged portions 134 described above penetrates the rear end surface of the bottom of each lock piece accommodating portion 136 in the vertical direction, which is the plate thickness direction, and in short, opens in the bottom surface of each lock piece accommodating portion 136. It is provided. Further, a lock protrusion 138 is provided on the outer circumferential surface of the wire outlet 22 and protrudes outward in the vertical direction, and in the first embodiment, each of the second engaged portions 134 A lock protrusion 138 that protrudes outward in the vertical direction is provided further forward than the lock protrusion 138 .

As shown in FIG. 6, a through hole 140 that penetrates the upper wall 116 in the thickness direction (vertical direction) is formed in the front portion of the upper wall 116 of the shield shell 24. The cylindrical connection portion 26 of each terminal 12 disposed inside the shield shell 24 is exposed to the outside space through the hole 140. Furthermore, a cylindrical portion 142 that projects upward is provided at the peripheral edge of the through hole 140 provided in the upper wall portion 116 . The cylindrical portion 142 has a substantially elliptical shape with a left-right dimension larger than that in the front-rear direction, and a front retainer 144 is assembled to the cylindrical portion 142. As shown in FIG. 2, a substantially circular through hole 146 is formed vertically through the front retainer 144 at a position corresponding to the cylindrical connection portion 26 of each terminal 12. When connected to a connector, a pin-shaped mating terminal is inserted into the cylindrical connection portion 26 of each terminal 12 through the through hole 146. Note that the cylindrical portion 142 and the front retainer 144 may be fixed to each other by, for example, a locking mechanism (not shown).

Further, in the left-right center portion of the shield shell 24, a bolt insertion hole 150, through which the fastening bolt 148 is inserted, is formed at the rear of the cylindrical portion 142 so as to pass through the shield shell 24 in the vertical direction. This fastening bolt 148 is configured to be fastened, for example, to the case of a mating device in which a mating terminal (not shown) is provided, and the cylindrical connection portion 26 of each terminal 12 is connected by using the fastening force of the fastening bolt 148. The mating terminal can be press-fitted into the terminal. Note that the fastening bolt 148 inserted into the bolt insertion hole 150 can be prevented from falling off from the bolt insertion hole 150 by a fixing member 152 such as a C ring.

Inside the shield shell 24 , a ring-shaped waterproof rubber 154 is fitted and attached to each electric wire 16 pulled out rearward from the rear opening 40 of each connector housing 14 . Each waterproof rubber 154 is inserted into the inside of the shield shell 24 from the rear opening (wire outlet 22) of the shield shell 24, and is located at the rear of each connector housing 14. Further, as described above, the mounting cylinder portion 74 of the back retainer 18 is fitted into the rear opening (wire outlet 22) of the shield shell 24, thereby preventing each waterproof rubber 154 from falling off.

<Assembling the connector 10>
A specific example of a method for assembling the connector 10 will be described below. Note that the method for assembling the connector 10 is not limited to the manner described below.

First, the core wire 34 exposed by peeling off the insulation coating 36 at the end of each electric wire 16 is fixed to the wire fixing part 32 of each terminal body 28, and each clip spring 30 is attached to the front end of each terminal body 28. As a result, each terminal 12 is connected to the terminal of each electric wire 16. Then, each waterproof rubber 154 is inserted and attached to each electric wire 16.

Next, each electric wire 16 with each terminal 12 and each waterproof rubber 154 assembled is inserted from the rear opening 40 of each connector housing 14. After each terminal 12 is inserted to a predetermined position, each connector housing 14 with each terminal 12 assembled is inserted from the rear opening (wire outlet 22) of the shield shell 24, and each connector housing 14 is inserted by, for example, concave-convex fitting. and the shield shell 24 are fixed. Further, the front retainer 144 is attached to the cylindrical portion 142 of the shield shell 24 from above. Thereby, each electric wire 16 is brought out to the outside (rearward) from each electric wire outlet 22 in the shield shell 24. Note that the fastening bolt 148 is inserted into the bolt insertion hole 150 at an appropriate timing.

Subsequently, as shown in FIG. 6, the upper and lower split retainers 42a and 42b are vertically moved so as to sandwich each electric wire 16 from above and below at the portion of each electric wire 16 that is pulled out backward from the electric wire outlet 22 of the shield shell 24. to face each other in direction. Thereafter, the upper and lower divided retainers 42a and 42b are brought close to each other in the vertical direction, and each lock claw part 68 and each lock frame body 70, and each elastic lock frame body 94 and each lock claw part 96 are engaged with each other. As a result, the back retainer 18 is attached to each electric wire 16 at a position spaced rearward from the shield shell 24.

Next, the back retainer 18 attached to each electric wire 16 is moved forward toward the shield shell 24. As a result, each elastic lock piece 78 protruding forward in the back retainer 18 is inserted into each lock piece accommodating part 136 that opens rearward at the wire outlet 22 of the shield shell 24, and is inserted into each lock piece accommodating part 136. Each elastic locking piece 78 is accommodated in the other direction. Then, each elastic lock piece 78 rides over each lock protrusion 138 provided on the bottom surface of each lock piece accommodating portion 136 with elastic deformation of each elastic lock piece 78, so that each elastic lock piece 78 is fitted. Each lock protrusion 138 is fitted into the hole 80 and engaged.

In addition, each first engaged part 104 and each second engaged part 132 and each second engaged part 134, which open rearward at the wire outlet 22 of the shield shell 24, are connected to each other. Insert the engaging portion 108. As a result, each crushing rib 102 in each first engaging part 104 and each crushing rib 106 in each second engaging part 108 are crushed by each first engaged part 132 and each second engaged part 134, respectively. By being compressed and deformed so as to be compressed, each first engaging portion 104 and each second engaging portion 108 are pressed against each first engaged portion 132 and each second engaged portion 134, respectively. Ru. As a result, the back retainer 18 fits into the wire outlet 22 of the shield shell 24. In this state, a wire holding protrusion 48 is disposed between the wires 16, 16 that protrude from the wire insertion tube portions 20, 20 of the back retainer 18 and extend in the withdrawal direction (backward) (see FIG. 2).

Thereafter, the first binding band 65 is strung between the upper and lower first band mounting parts 58 of the wire pressing protrusion 48 disposed between the electric wires 16 , 16 , and the wire pressing protrusion 48 of the back retainer 18 is connected to the first binding band 65 . Each electric wire 16 is fixed with a first binding band 65. Further, a second binding band 87 is spanned between the upper and lower second band mounting portions 82 provided on each elastic lock piece 78, and the back retainer 18 and the shield shell 24 are fixed by the second binding band 87. do. Thereby, the connector 10 is completed.

According to the connector 10 of Embodiment 1 having the above-described structure, the first binding band 65 spanned between each of the first band attachment parts 58 protrudes from each electric wire insertion cylinder part 20 and is directed in the drawing direction. The electric wires 16 extending (rearward) are bound and fixed to each other in close contact with the electric wire contact surfaces 56 of the wire holding protrusion 48 . As a result, since each electric wire 16 and the back retainer 18 are fixed by the first binding band 65, external force input to each electric wire 16 due to vibration etc. is prevented from being transmitted to each terminal 12 side. Ru. Further, the first binding band 65 contacts each first band attachment portion 58 from both sides in the vertical direction, and presses the divided protrusions 46 in the upper and lower divided retainers 42a, 42b against each other from both sides in the vertical direction. ing. As a result, displacement of the upper and lower divided retainers 42a and 42b in the direction of opening (separating) from each other is suppressed, and each electric wire 16 is held between the divided cylindrical parts 50 constituting each electric wire insertion cylindrical part 20. is maintained stably. As a result, each electric wire 16 is not only fixed by the first binding band 65, but also the generation of a gap between each electric wire insertion tube 20 and each electric wire 16 is suppressed by the first binding band 65, The effect of blocking external force can be more reliably exerted.

A pair of wire contact surfaces 56, 56 in the wire holding protrusion 48 are constituted by curved surfaces that are convex inward in the opposing direction (horizontal direction). As a result, each electric wire contact surface 56 can be shaped to approximately correspond to the outer peripheral surface of each electric wire 16, and a wide contact area between each electric wire contact surface 56 and the outer peripheral surface of each electric wire 16 can be secured. Yes (see Figure 5). As a result, each electric wire 16 can be stably held by the first binding band 65 on both the left and right sides of the electric wire holding protrusion 48, and the effect of blocking external force can be improved. Furthermore, compared to, for example, a case in which each electric wire contact surface is a flat surface, the resistance when inserting the dividing protrusion 46 between each electric wire 16 can be reduced, and the upper and lower parts of each electric wire 16 can be separated. The ease of assembling the retainers 42a and 42b can be improved.

A first engaging portion having each crushing rib 102 in the back retainer 18 is connected to a plurality of engaged portions 130 (a first engaged portion 132 and a second engaged portion 134) at the wire outlet 22 of the shield shell 24. The mating portion 104 and the second engaging portion 108 having the crushing ribs 106 are fitted into each other. In particular, each crushing rib 102, 106 is deformed so as to be crushed against each first engaged part 132 and each second engaged part 134, so that each first engaged part 104 and each second engaged part Since the joint portions 108 are pressed against each of the first engaged portions 132 and the second engaged portions 134, rattling between the shield shell 24 and the back retainer 18 is prevented. As a result, even if an external force such as vibration input from the outside is applied to each electric wire 16 and, for example, each electric wire 16 swings vertically or horizontally, the back retainer 18 is displaced relative to the shield shell 24 and the external force This prevents the damage from reaching each terminal 12 connected to each electric wire 16.

Each divided retainer 42a, 42b has a pair of second band attachment parts 82 arranged on both sides in the vertical direction, and a second binding band 87 spanned between each second band attachment part 82 allows The upper and lower divided retainers 42a and 42b are pressed against each other from both sides in the vertical direction, and the back retainer 18 is bound and fixed to the wire outlet 22 of the shield shell 24. As a result, the second binding band 87 can prevent looseness between the back retainer 18 and the shield shell 24, and each electric wire 16 can be fixed to the shield shell 24 via the back retainer 18. In particular, in the first embodiment, the second binding band 87 is the engagement portion between each first engaging portion 104 and each first engaged portion 132, which is the fitting position between the back retainer 18 and the shield shell 24; and is provided so as to cover the engaging portion between each second engaging portion 108 and each second engaged portion 134 from the outer peripheral side. This suppresses rattling between the back retainer 18 and the shield shell 24, and prevents the fitting between them from being unintentionally released.

Each first engaging portion 104 and each first engaged portion 132 are provided on both sides in the left-right direction, and each second engaging portion 108 and each second engaged portion 134 are provided on both sides in the vertical direction. It is provided. As a result, in the circumferential direction of the wire outlet 22, each first engaging portion 104 and each first engaged portion 132 and each second engaging portion 108 and each second engaged portion 134 are connected in the left-right direction and Since the back retainer 18 can be arranged symmetrically in the vertical direction, displacement of the back retainer 18 with respect to the shield shell 24 can be further suppressed.

Each wire pressing convex portion 66 in the back retainer 18 presses the insulation coating 36 of each wire 16 inward in the radial direction, so that each wire 16 is inserted and held in a press-contact state with respect to each wire insertion cylinder portion 20. has been done. Thereby, the amount of displacement of each electric wire 16 with respect to the back retainer 18 can be suppressed to a small value. In particular, in Embodiment 1, the plurality of wire pressing protrusions 66 that are spaced apart in the circumferential direction in each wire insertion cylinder section 20 are also spaced apart in the axial direction, so that the rotational direction of each wire 16 is The amount of displacement (twisting) can also be effectively suppressed.

The back retainer 18 has each elastic lock piece 78, and the shield shell 24 has each lock protrusion 138. By fitting each lock protrusion 138 into each elastic lock piece 78, the back retainer 18 is It is adapted to be fitted into the wire outlet 22 of the shield shell 24. Thereby, the back retainer 18 can be assembled to the shield shell 24 with a simple structure of each elastic lock piece 78 and each lock protrusion 138. Further, since the shield shell 24 is provided with each lock piece accommodating portion 136 that opens on the outer peripheral surface and accommodates each elastic lock piece 78, each elastic lock piece 78 from each lock piece accommodating portion 136 is The amount of protrusion can be made small or zero. Thereby, the size of the back retainer 18, the shield shell 24, and ultimately the connector 10 can be reduced. Moreover, the possibility that the engagement between each elastic lock piece 78 and each lock protrusion 138 is unintentionally released and the back retainer 18 falls off from the shield shell 24 can be reduced. In particular, in the first embodiment, each second band mounting portion 82 is provided on each elastic locking piece 78. Therefore, by attaching the second binding band 87 after each elastic lock piece 78 and each lock protrusion 138 are fitted, each elastic lock piece 78 is disengaged from each lock protrusion 138 in a direction. This further prevents unintentional displacement.

Each second engaged portion 134 is provided at the bottom of each lock piece accommodating portion 136 in which each elastic lock piece 78 is accommodated, and each second engaged portion 134 is provided at the base end side (rear side) of each elastic lock piece 78. Each second engaging portion 108 is provided to be press-fitted into the second engaged portion 134 . That is, in the upper wall part 116 and the lower wall part 118 of the shield shell 24, each lock piece accommodating part 136 and each second engaged part 134 are provided continuously in the vertical direction. The shield shell 24 can be prevented from increasing in size compared to the case where the second engaged portions and the second engaged portions are provided at different positions in the circumferential direction of the wire outlet. Similarly, each elastic locking piece 78 and each second engaging part 108 can be provided at the same position in the circumferential direction of the mounting cylinder part 74 in the back retainer 18, and it is possible to avoid increasing the size of the back retainer 18. can.

When the back retainer 18 is fitted to the shield shell 24, each first engaging portion 104 is accommodated in each first engaged portion 132 without protruding toward the outer circumferential side of the wire outlet 22. This can prevent each first engaging portion 104 from unintentionally falling off from each first engaged portion 132 due to contact with another member or a worker.

<Modified example>
Although the embodiments have been described above in detail as specific examples of the present disclosure, the present disclosure is not limited by this specific description. Modifications, improvements, etc. within the scope of achieving the objectives of the present disclosure are included in the present disclosure. For example, the following modifications of the embodiment are also included in the technical scope of the present disclosure.

(1) The shape of the terminal 12 in the above embodiment is merely an example, and is not limited. That is, in the embodiment described above, the terminal 12 had the cylindrical connecting portion 26 into which the pin-shaped mating terminal is inserted, but the present invention is not limited to this aspect. The mating terminal may have a flat tab shape, for example, as described in International Publication No. 2021/145197, and in that case, the terminal only needs to have a substantially rectangular terminal insertion gap.

(2) In the embodiment, a plurality of first engaging portions 104 and second engaging portions 108 are provided, and corresponding to the plurality of first engaging portions 104 and second engaging portions 108, , a plurality of first engaged parts 132 and second engaged parts 134 were provided, but the present invention is not limited to this embodiment. That is, in the connector according to the present disclosure, the number of the first engaging part and the second engaging part is not limited, and one or more of the first engaging part and the second engaging part are provided. , one or more first engaged parts and second engaged parts may be provided corresponding to these first engaging parts and second engaging parts. Note that in the connector according to the present disclosure, the first engaging portion, the second engaging portion, the first engaged portion, and the second engaged portion are not essential and may not be provided.

(3) In the embodiment described above, each lock piece accommodating portion 136 was provided on the outer peripheral surface of the wire outlet 22 in the shield shell 24, and each lock protrusion 138 was provided on the bottom surface of each lock piece accommodating portion 136. , but is not limited to this embodiment. That is, in the connector according to the present disclosure, the lock piece accommodating portion does not need to be provided. For example, the lock protrusion may protrude outward from the outer peripheral surface of the wire outlet in the shield shell, and in that case, each elastic lock piece is arranged to overlap with the outer peripheral surface of the wire outlet in the shield shell.

(4) In the embodiment described above, each elastic locking piece 78 was provided on the outer peripheral side (outward in the vertical direction) of each second engaging part 108, but instead of or in addition to the second engaging part, Each elastic lock piece may be provided on the outer peripheral side of the first engaging portion. That is, in the embodiment described above, the elastic lock pieces 78 were provided on both sides of the back retainer 18 in the vertical direction, but the elastic lock pieces 78 are provided on one or both sides of the back retainer in the left and right directions, and the elastic lock pieces 78 are provided on one or both sides of the back retainer in the left and right directions. Alternatively, it may be adapted to engage with lock protrusions provided on both sides. Note that in the connector according to the present disclosure, the elastic lock piece is not essential.

(5) In the embodiment described above, the back retainer 18 is composed of a pair of split retainers 42a and 42b that have the same shape, but the pair of split retainers may have different shapes. Note that the pair of split retainers may be formed integrally. For example, a hinge part is provided at one end in the circumferential direction of each split retainer to enable each split retainer to be opened and closed, and after each electric wire is sandwiched, a locking mechanism etc. provided at the other end in the circumferential direction of each split retainer is used. , each divided retainer may be fixed to each other.

(6) In the embodiment described above, the outer circumferential surface of each electric wire 16 was in close contact with substantially the entire surface of each electric wire contact surface 56 on both the left and right sides of the electric wire holding protrusion 48, but the outer circumferential surface of each electric wire and each electric wire contact surface should be at least partially close together. Further, in the above embodiment, each wire contact surface 56 is formed of a curved surface that is convex inward in the opposing direction (left-right direction), but it may be a vertical surface that extends in the vertical direction, for example. The inner portion of the insulation coating of each electric wire in the left-right direction may be pressed and deformed by the electric wire contact surface extending in the vertical direction.

(7) In the above embodiment, the second cable tie 87 was provided in addition to the first cable tie 65, but in the connector according to the present disclosure, the second cable tie does not have to be provided. Furthermore, the shapes of the first band attachment portion and the second band attachment portion to which the first cable tie and the second cable tie are attached are not limited, and may be a trough shape as in the above embodiment, a cylindrical shape, or a frame shape.

(8) The back retainer only needs to be assembled to the connector housing side, and may be assembled directly to the connector housing, or indirectly assembled to the connector housing via another member assembled to the connector housing, such as a shield shell. It's okay to be hit. That is, in the connector according to the present disclosure, the shield shell is not essential.

10 Connector 12 Terminal 14 Connector housing 16 Wire 18 Back retainer 20 Wire insertion cylindrical portion 22 Wire outlet 24 Shield shell 26 Cylindrical connection portion 28 Terminal body 30 Clip spring 32 Wire fixing portion 34 Core wire 36 Insulation coating 38 Terminal accommodating portion 40 Rear Openings 42a, 42b Divided retainer 44 Concave groove 46 Divided protrusion 48 Wire holding protrusion 50 Divided cylinder part 52 Gap 54 Connecting part 56 Wire contact surface 58 First band attachment part 60 Divided contact surface 62 Flat surface 64 Side edge 65 First binding band 66 Wire pressing convex part 68 Lock claw part 70 Lock frame 72 Base part 74 Mounting tube part 76 Rib 78 Elastic lock piece 80 Fitting hole 82 Second band mounting part 84 Flat surface 86 Side edge part 87 Second Binding band 88 Front protruding part 90 Connecting part 92 Downward extending part 94 Elastic lock frame 96 Lock claw part 98 Downward protruding part 100 Connecting part 102 Crushing rib 104 First engaging part 106 Crushing rib 108 Second engaging part 110 Vertical Wall portion 112 Connecting wall portion 114 Through hole 116 Upper wall portion 118 Lower wall portion 120 Left wall portion 122 Right wall portion 124 Front wall portion 126 Partition portion 128 Cylindrical end portion 130 Engaged portion 132 First engaged portion Part 134 Second engaged part 136 Lock piece housing part 138 Lock protrusion 140 Through hole 142 Cylindrical part 144 Front retainer 146 Through hole 148 Fastening bolt 150 Bolt insertion hole 152 Fixing member 154 Waterproof rubber

Claims (10)

a plurality of terminals housed in the connector housing;
a plurality of electric wires each connected to the plurality of terminals and drawn out in parallel to the outside of the connector housing with a gap between them;
a back retainer made of synthetic resin that is assembled to the connector housing side and has a plurality of wire insertion tube portions into which the plurality of wires drawn out from the connector housing are inserted and held in a press-contact state; Prepare,
The back retainer is
a pair of split retainers that sandwich and hold the electric wires from both sides in the direction perpendicular to the axis of each of the electric wires, and are fixed to each other;
A pair of the split retainers are located between a plurality of grooves that are in close contact with the outer peripheral surfaces of the plurality of electric wires, respectively, and a plurality of grooves in a parallel direction of the plurality of electric wires, and are arranged in a direction in which the plurality of electric wires are drawn out. each has a divided protrusion protruding from the
By fixing the pair of divided retainers to each other, the plurality of electric wire insertion tube parts are partitioned by the plurality of grooves and arranged in parallel, and the divided protrusions are combined to form a plurality of electric wires. An electric wire holding protrusion is configured to be arranged between the plurality of electric wires that protrudes from the insertion tube and extends in the drawing direction,
The wire holding protrusion is provided on a pair of wire contact surfaces that contact the wires arranged on both sides in the parallel direction, and on both end surfaces in a first direction perpendicular to the opposing direction of the pair of wire contact surfaces. a pair of first band attachment parts,
The plurality of electric wires protruding from the plurality of electric wire insertion cylindrical portions and extending in the drawing direction are each connected to the electric wire presser of the back retainer by the first binding band spanned between the pair of first band attachment parts. The pair of protrusions are bound and fixed to each other in close contact with the wire contact surfaces, and the first binding band contacts the pair of first band attachment parts from both sides in the first direction, A connector, wherein the divided protrusions of each of the pair of divided retainers constituting the wire holding protrusion are pressed against each other from both sides in the first direction. 2. The connector according to claim 1, wherein the pair of wire contact surfaces of the wire holding protrusion are configured by curved surfaces that are convex inward in the opposing direction. The back retainer further comprises: a metal shield shell fixed to the connector housing to cover the connector housing and having a cylindrical wire outlet through which the plurality of wires drawn out of the connector housing are drawn out; is fitted into the wire outlet of the shield shell,
The wire outlet of the shield shell has a plurality of engaged parts spaced apart from each other in a circumferential direction of the wire outlet,
The back retainer includes a first engaging portion having crushing ribs provided on both sides in the first direction and engaged with the engaged portion, and a crushing rib provided on both sides in the parallel direction. and a second engaging part that is engaged with the engaged part,
In the fitted state of the back retainer to the wire outlet, the first engaging part is pressed against the engaged part via the crushing rib on both sides in the first direction, and the second engaging part is pressed against the engaged part via the crushing rib. 3. The connector according to claim 1, wherein the mating portion is pressed against the engaged portion on both sides in the parallel direction via the crushing rib. Each of the split retainers has a second band attachment part provided on an end side opposite to the split protrusion in the pull-out direction, and the back retainer is constructed by assembling the split retainers together. , a pair of second band attachment parts disposed on both sides in the first direction,
The pair of divided retainers are pressed against each other from both sides in the first direction by a second binding band spanned between the pair of second band attachment parts, and the back retainer is pressed against the shield. The connector according to claim 3, wherein the connector is bundled and fixed to the wire outlet of the shell. The plurality of engaged parts of the wire outlet include a plurality of first engaged parts arranged on both sides in the parallel direction, and a plurality of second engaged parts arranged on both sides in the first direction. including the
The back retainer includes a plurality of first engaging parts arranged on both sides of the parallel direction and a plurality of second engaging parts arranged on both sides of the first direction,
In the fitted state of the back retainer to the wire outlet, the first engaging portion engages the first engaged portion on both sides in the parallel direction through the crushing ribs on both sides in the first direction. Claim 3, wherein the second engaging portion is pressed against the second engaged portion on both sides in the first direction via the crushing ribs on both sides in the parallel direction. Connectors listed in. The diameter dimension of the inner circumferential surface of each of the electric wire insertion tube parts of the back retainer is made larger than the diameter dimension of the outer circumference surface of each of the electric wires that are inserted into the inside of the electric wire insertion tube portion,
A plurality of wire pressing convex portions that protrude radially inward from the outer peripheral surface of each electric wire are provided on the inner circumferential surface of each of the electric wire insertion tube portions and are spaced apart from each other,
Each of the electric wire pressing convex portions presses the insulating coating constituting the outer circumferential surface of each of the electric wires inward in the radial direction, so that the electric wires are inserted into and held in the electric wire insertion cylinder portion in a pressure-contact state. 3. The connector according to claim 1 or claim 2. The back retainer has an elastic lock piece that protrudes in a cantilever shape toward the wire outlet of the shield shell, and the elastic lock piece has a fitting hole at a protruding end.
The shield shell has a lock protrusion protruding from the outer peripheral surface of the wire outlet,
Claim 3, wherein the lock protrusion of the shield shell is fitted into the fitting hole of the elastic lock piece of the back retainer, thereby fitting the back retainer to the wire outlet of the shield shell. Connectors listed in. The electric wire outlet of the shield shell has a concave lock piece accommodating part that opens on the outer peripheral surface of the electric wire outlet, and the lock protrusion is provided protrudingly on the bottom surface of the lock piece accommodating part,
8. The connector according to claim 7, wherein the elastic lock piece of the back retainer is accommodated in the lock piece accommodating portion when the back retainer is fitted to the shield shell. The wire outlet of the shield shell is provided with a plurality of notch-shaped coverings that penetrate in the plate thickness direction and open at the end face of the wire in the lead-out direction. An engaging part is provided,
at least one of the engaged portions is provided to be open on the bottom surface of the lock piece accommodating portion;
On the proximal end side of the elastic locking piece of the back retainer, the second engaging portion has a protruding shape that projects from the elastic locking piece toward the electric wire side and is press-fitted into the at least one engaged portion. The connector according to claim 8, wherein the connector is provided with a. The back retainer includes a mounting cylinder part that is fitted into the inner peripheral side of the cylindrical end of the wire outlet, and a protruding first engaging part that projects from the outer peripheral surface of the mounting cylinder part. including,
The first engaging portion is accommodated in the engaged portion without protruding toward the outer peripheral side of the wire outlet when the back retainer is fitted to the shield shell. connector.

Images