WO2021090698A1

WO2021090698A1 - Connector

Info

Publication number: WO2021090698A1
Application number: PCT/JP2020/039829
Authority: WO
Inventors: 真吾小林; ソンヒョンビョン
Original assignee: 株式会社オートネットワーク技術研究所; 住友電装株式会社; 住友電気工業株式会社
Priority date: 2019-11-07
Filing date: 2020-10-23
Publication date: 2021-05-14
Also published as: JP2021077494A

Abstract

Provided is a connector of a novel structure that can suppress or prevent external force due to displacement by electric wire vibration, etc., from being transmitted to a terminal within the connector.　This connector 10 comprises: a housing 16 that accommodates terminals 12; a back retainer 60 mounted on the rear end of the housing 16 from which electric wires 18 connected to the terminals 12 are pulled out; cylindrical electric wire insertion holes 94 provided on the back retainer 60; and electric wire pressing parts 70 protruding on the inner circumference surface of the electric wire insertion holes 94. The diameter of the electric wire insertion holes 94 is greater than the outer diameter of the electric wires 18, and the electric wires 18 are held in a state of being pressed on the electric wire insertion holes 94 by the electric wire pressing parts 70.

Description

connector

This disclosure relates to a connector equipped with a back retainer.

Conventionally, as a kind of connector used for electrically connecting in-vehicle devices, as described in Japanese Patent Application Laid-Open No. 2010-246339 (Patent Document 1), a housing accommodating a terminal and a connector connected to the terminal. It is known to have a back retainer attached to the rear end of the housing from which the electric wire is pulled out. The back retainer has a function of preventing the seal rubber, which is previously fitted to the electric wire and seals between the housing and the electric wire, from being separated from the rear end portion of the housing.

JP-A-2010-246339

By the way, in electric vehicles and hybrid vehicles, since the power used is relatively high voltage and large current, the size of the electric wire tends to increase and the weight tends to increase. As a result, there is a problem that changes in the electric wire such as tension of the electric wire due to the shaking of the electric wire and the temperature change due to the electric wire are likely to occur. When the displacement of the electric wire is transmitted to the terminal in the connector, the contact part with the terminal on the other side moves and the plating wears, which may increase the contact resistance and cause problems such as sparking due to the contact separation. Conceivable.

The present disclosure has been made in the background of the above-mentioned circumstances, and the problem to be solved is a novel structure capable of suppressing or preventing transmission of an external force due to displacement such as shaking of an electric wire to a terminal in a connector. To provide connectors for.

The connector of the present disclosure includes a housing for accommodating terminals, a back retainer attached to the rear end of the housing from which an electric wire connected to the terminal is pulled out, and a tubular electric wire insertion hole provided in the back retainer. And an electric wire pressing portion projecting from the inner peripheral surface of the electric wire insertion hole, the hole diameter of the electric wire insertion hole is larger than the outer diameter of the electric wire, and the electric wire is formed by the electric wire pressing portion. It is a connector held in a state of being pressed by.

According to the present disclosure, it is possible to provide a connector capable of suppressing or preventing transmission of an external force due to displacement such as shaking of an electric wire to a terminal in the connector.

FIG. 1 is an exploded perspective view showing a connector according to an embodiment of the present disclosure. FIG. 2 is a vertical cross-sectional view showing the connector in the assembled state in FIG. FIG. 3 is a vertical cross-sectional view showing an electric wire and a back retainer connected to one terminal in FIG. FIG. 4 is an exploded perspective view of the back retainer shown in FIG. 1 as viewed from diagonally above and forward. FIG. 5 is a perspective view of the split retainer shown in FIG. 4 as viewed from another direction. FIG. 6 is an exploded perspective view of the back retainer according to the modified example 1 as viewed from diagonally above and forward. FIG. 7 is a perspective view of the split retainer shown in FIG. 6 as viewed from another direction. FIG. 8 is an exploded perspective view of the back retainer according to the modified example 2 as viewed from diagonally above and forward. FIG. 9 is a perspective view of the split retainer shown in FIG. 8 as viewed from another direction.

<Explanation of Embodiments of the present disclosure>
First, embodiments of the present disclosure will be listed and described.
The connectors of the present disclosure are
(1) A housing for accommodating terminals, a back retainer attached to the rear end of the housing from which an electric wire connected to the terminal is pulled out, a tubular electric wire insertion hole provided in the back retainer, and the above. It is provided with an electric wire pressing portion projecting from the inner peripheral surface of the electric wire insertion hole, the hole diameter of the electric wire insertion hole is larger than the outer diameter of the electric wire, and the electric wire is pressed against the electric wire insertion hole by the electric wire pressing portion. It is a connector that is held in a closed state.

According to the connector of the present disclosure, the back retainer is provided with an electric wire insertion hole, and the electric wire inserted into the electric wire insertion hole is pressed against the electric wire insertion hole by the electric wire pressing portion projecting from the inner peripheral surface of the electric wire insertion hole. It is held in a state of being. That is, the electric wire is firmly fixed to the back retainer, and the displacement of the electric wire is prevented by the back retainer. As a result, the external force exerted from the electric wire to the terminal side due to the displacement such as the tension of the electric wire due to the shaking of the electric wire or the temperature change is surely dispersed to the housing via the back retainer, and the external force is transmitted to the terminal in the connector. This can be reliably suppressed or prevented. As a result, there are problems such as the contact part of the terminal with the other side terminal moving due to displacement such as shaking of the electric wire, the plating wears, the contact resistance increases, and sparks occur due to the contact separation. Can be prevented from occurring.

In particular, the hole diameter of the electric wire insertion hole is larger than the outer diameter of the electric wire, and the electric wire pressing portion protrudes inward from the outer surface of the electric wire, so that the electric wire is pressed against the electric wire pressing portion. Therefore, while facilitating the arrangement of the electric wire in the electric wire insertion hole, it is possible to allow the insulation coating of the electric wire pressed by the electric wire pressing portion to be deformed, and to realize a reliable bite into the electric wire of the electric wire pressing portion. As a result, the occurrence of misalignment of the electric wire in the electric wire insertion hole can be advantageously prevented, and the electric wire can be fixedly held in the electric wire insertion hole.

It is sufficient that at least one electric wire pressing portion is provided on the inner peripheral surface of the electric wire insertion hole, but a plurality of electric wire pressing portions may be provided dispersedly in the circumferential direction.

(2) The back retainer is configured to include a plurality of split retainers, and each of the split retainers has a split inner peripheral surface that partially constitutes an inner peripheral surface of the electric wire insertion hole, and the split retainer. It is preferable that the divided inner peripheral surfaces are connected in the circumferential direction to form the electric wire insertion hole by assembling the wires to each other. By dividing the back retainer into a plurality of divided retainers, when the terminal connected to the end of the electric wire is accommodated in the housing of the connector, the work of inserting the electric wire into the electric wire insertion hole of the back retainer in advance is performed. This is because it can be made unnecessary. After accommodating the terminal and the electric wire in the housing, the back retainer can be attached to the rear end portion of the housing with the electric wire sandwiched between them, so that workability can be improved. In particular, since the electric wire pressing portion is projected on the inner peripheral surface of the electric wire insertion hole, it is difficult to insert the electric wire into the electric wire insertion hole. The work of inserting the electric wire becomes unnecessary, and the pressing of the electric wire pressing portion on the electric wire can be surely achieved at the same time as the assembly of the split retainer. Furthermore, since the hole diameter of the electric wire insertion hole formed by connecting the inner peripheral surfaces of the division is larger than the outer diameter of the electric wire, the force required for assembling the division retainer can be reduced, and the workability of assembling the division retainer is improved. Is also planned. The split retainer may be configured as a single item separated from each other, or may be configured as a single item connected to each other by a hinge or the like.

(3) In the above (2), it is preferable that the back retainer includes the pair of the split retainers, and the split retainers have the same shape as each other. This is because by using a pair of split retainers, the split retainers can be mounted toward the wires from both sides in the radial direction with the wires sandwiched between them, and workability can be improved. Moreover, since the split retainers have the same shape, the cost for mold and parts management can be reduced.

(4) It is preferable that a plurality of electric wire pressing portions are dispersedly arranged in the circumferential direction on the inner peripheral surface of the electric wire insertion hole. This is because the electric wires arranged in the electric wire insertion holes can be pressed by a plurality of electric wire pressing portions dispersedly arranged apart from each other in the circumferential direction, and the displacement of the electric wires can be suppressed more stably. More preferably, the plurality of electric wire pressing portions are evenly distributed in the circumferential direction. The pressing force of the electric wire pressing portion can be applied in a well-balanced manner in the circumferential direction of the electric wire, and more stable holding of the electric wire by the back retainer can be realized. The shapes of the plurality of electric wire pressing portions may be the same as each other, or may be different from each other in consideration of the displacement state of the electric wires.

(5) It is preferable that the electric wire pressing portion has a hemispherical shape. This is because the engagement allowance of the electric wire pressing portion with respect to the insulating coating of the electric wire can be stably secured against the external force transmitted from the electric wire in all directions.

(6) It is preferable that the electric wire pressing portion has an axial dimension larger than the circumferential dimension in the electric wire insertion hole. This is because the contact area between the electric wire pressing portion and the insulating coating of the electric wire can be stably secured by increasing the axial dimension of the electric wire pressing portion. Moreover, by increasing the axial dimension instead of the circumferential dimension of the electric wire pressing portion to increase the contact area with the insulating coating, the deformation of the insulating coating pressed by the electric wire pressing portion can be easily absorbed in the circumferential direction. be able to. As a result, it is possible to reduce the assembling force required for assembling the split retainer as compared with the case where the circumferential dimension of the electric wire pressing portion is increased, and both the increase in the contact area and the improvement in workability are achieved. Can be achieved.

<Details of Embodiments of the present disclosure>
Specific examples of the connectors of the present disclosure will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

<The present embodiment>
Hereinafter, embodiments of the present disclosure will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the connector 10 in the present embodiment includes a housing 16 that houses the terminal 12 and the spring member 14, an electric wire 18 that is connected to the terminal 12 and extends from the rear end of the housing 16, and the housing 16. It is configured to include a back retainer 20 that is attached to the rear end portion and holds the electric wire 18. In addition, about a plurality of the same members, a reference numeral may be given only to a part of the members, and the reference numeral may be omitted for other members.

<Housing 16>
As shown in FIGS. 1 and 2, the terminal 12 is housed in the housing 16 of the connector 10 together with the spring member 14, and is used as the connector 10. The housing 16 is made of synthetic resin and has a square tube shape that extends in the length direction and opens in the front-rear direction. A mating terminal insertion hole 22 into which the mating terminal 21 is inserted is formed at two places separated in the vertical direction on the front side of the housing 16, and two places separated in the vertical direction on the rear side of the housing 16 are formed. A terminal insertion hole 24 into which the terminal 12 is inserted is formed. In addition, for easy understanding, the other side terminal 21 is described by a virtual line. The mating terminal insertion holes 22 and the terminal insertion holes 24 formed at the above two locations each communicate with the cavity 26 having a rectangular cross-sectional shape and being separated in the vertical direction and extending in the length direction. On the front end side of the cavity 26, a recessed spring member accommodating portion 28 is formed in the wall portion, and engagement holes 30 are formed in the upper wall and the lower wall on the rear side of the spring member accommodating portion 28, respectively. ing.

<Terminal 12>
As shown in FIG. 1, the terminal 12 is a flat plate-shaped connection terminal. As the material of the terminal 12, for example, a metal material such as copper, copper alloy, aluminum, aluminum alloy, or stainless steel can be appropriately used. The terminal 12 may be surface-treated such as silver-plated, tin-plated, or aluminum-plated, depending on the type of the constituent metal and the usage environment. The terminal 12 can be formed, for example, by press punching a metal plate having excellent conductivity. The terminal 12 has a mating terminal connecting portion 32 electrically connected to the mating terminal 21 (see FIGS. 2 and 3) on the tip side (left side in FIG. 1), and has a base end side (FIG. 2). (Middle, right side) has a core wire crimping portion 34 connected to the electric wire 18. The core wire crimping portion 34 has a rectangular flat plate-shaped bottom wall 36 and a pair of rectangular flat plate-shaped crimping

pieces

38, 38 protruding from both side edges in the width direction of the bottom wall 36. The core wire 40 of the electric wire 18 is conductively connected to the core wire crimping portion 34. The electric wire 18 has a structure in which a core wire 40 obtained by bundling a plurality of conductors such as copper, aluminum, and other metal wires is covered with an insulating coating 42 having electrical insulation properties such as ethylene resin and styrene resin. .. Then, the core wire 40 exposed by stripping the insulating coating 42 at the end of the electric wire 18 is placed on the bottom wall 36 of the core wire crimping portion 34, and then crimped using a known crimping technique. As a result, the core wire crimping portion 34 provided with the bottom wall 36 and the pair of crimping

pieces

38, 38 is plastically deformed and crimped so as to wrap the core wire 40 from the outer peripheral surface, and the core wire 40 of the electric wire 18 is crimped to the terminal 12. Is connected electrically.

<Contact 44>
As shown in FIGS. 1 to 3, the terminal 12 has a contact portion 44 formed on a surface facing the mating terminal 21 so as to bulge toward the mating terminal 21 in a curved surface. The contact portion 44 has a gently curved surface shape that is almost a flat surface. In the present embodiment, the contact portion 44 is formed so as to spread in a band shape over the entire length in the width direction in a part in the length direction.

<Spring member 14>
The spring member 14 is formed by using various metal materials capable of press working, punching, and the like, for example, strips of spring steel, stainless steel, brass, phosphor bronze, beryllium copper, and the like. The spring member 14 may be surface-treated such as silver-plated, tin-plated, or aluminum-plated, depending on the type of the constituent metal and the usage environment. As shown in FIGS. 1 and 2, the mating terminal 21 is superimposed on the mating terminal connecting portion 32 of the terminal 12. The

pressing pieces

46a and 46b of the spring member 14 are superposed so as to sandwich the mating terminal connection portion 32 and the mating terminal 21 from above and below from both sides in the superposition direction (vertical direction in FIGS. 1 and 2). .. The right end portions (in the back side in FIG. 1) of the

pressing pieces

46a and 46b in the width direction are connected by a rectangular flat plate-shaped connecting portion 48. The pressing piece 46a that comes into contact with the mating terminal 21 of the spring member 14 has a spherical shell-shaped pressing point 50 that bulges toward the mating terminal 21.

<Spring member retainer 52>
As shown in FIG. 2, the terminal 12 has an engaging hole 54 between the mating terminal connecting portion 32 and the core wire crimping portion 34. The engagement hole 54 is formed so as to penetrate the terminal 12 in the plate thickness direction. The spring member retainer 52 is formed of, for example, a synthetic resin having excellent heat resistance and rigidity, and includes an upper spring member retainer split body 56 and a lower spring member retainer split body 58. The upper spring member retainer split body 56 and the lower spring member retainer split body 58 are assembled and fixed to each other by an engagement mechanism (not shown). The upper spring member retainer split body 56 is provided with an engaging protrusion 56a having a rectangular cross-sectional shape protruding downward and an engaging protrusion 56b having a triangular cross-sectional shape protruding upward. The lower spring member retainer split body 58 is provided with an engaging protrusion 58a having a rectangular cross-sectional shape protruding upward and an engaging protrusion 58b having a triangular cross-sectional shape protruding downward. As shown in FIG. 2, the engaging protrusion 56a of the upper spring member retainer split body 56 is engaged with the left side of the engaging hole 54 of the terminal 12, and the engaging protrusion 58a of the lower spring member retainer split body 58 is engaged. It is engaged on the right side of the engagement hole 54 of the terminal 12. In this way, the upper spring member retainer split body 56 and the lower spring member retainer split body 58 are assembled to each other and fixed to the terminal 12.

<Back retainer 20>
A back retainer 20 and a seal member 62 are attached to the terminal of the electric wire 18. That is, the back retainer 20 and the seal member 62 are mounted on the rear end of the housing 16 from which the electric wire 18 connected to the terminal 12 is pulled out. As shown in FIG. 4, in the present embodiment, the back retainer 20 includes a pair of

split retainers

64 and 64 having the same shape as each other. Each split retainer 64 has a substantially block shape, and each of the two split inner circumferences cut out in a semicircular shape in front view at two locations separated above and below the surface facing the other split retainer 64. A surface 66 is formed. That is, each split retainer 64 has two split inner peripheral surfaces 66 that partially form the inner peripheral surface of the electric wire insertion hole 94, which will be described later. On each of the divided inner peripheral surfaces 66, three electric wire pressing portions 70 projecting inward in the radial direction are arranged evenly distributed in the circumferential direction. As shown in FIG. 5, a ridge 71 and a groove 72 located between the two inner peripheral surfaces 66 and extending in the longitudinal direction are provided on the surface of each division retainer 64 facing the other division retainer 64. ing. Further, on one side of each split retainer 64 in the width direction on the surface facing the other split retainer 64, an engaging piece 76 projecting like a cantilever and having an engaging hole 74 at the tip thereof is provided, and the other in the width direction. An engaging protrusion 78 is provided on the side surface of the above. Further, a hood portion 80 extending along the outer peripheral edge portion is projected on the surface of each split retainer 64 facing the housing 16. The hood portion 80 is provided with engaging holes 82 having a rectangular cross-sectional shape at two locations separated in the extending direction in the plate thickness direction. An engaging piece 86 that protrudes like a cantilever and has an engaging hole 84 at the tip thereof is provided on one end side of the hood portion 80 in the extending direction.

<Seal member 62>
The seal member 62 is made of rubber, and as shown in FIGS. 2 and 3, in the terminal of the electric wire 18, on the outer peripheral surface of the electric wire 18 on the terminal 12 side adjacent to the divided inner peripheral surface 66 constituting the back retainer 20. It is attached.

<Assembly method of this embodiment>
The assembling method of the present embodiment will be briefly described below. First, a rubber sealing member 62 is inserted through the insulating coating 42 at the end of the electric wire 18 in advance. Next, the terminal 12 is prepared, and the core wire 40 of the electric wire 18 is crimped to the core wire crimping portion 34 of the terminal 12 to make a conductive connection. Subsequently, the spring member retainer 52 composed of the upper spring member retainer split body 56 and the lower spring member retainer split body 58 is attached to the engagement hole 54 of the terminal 12. The spring member 14 is arranged at the mating terminal connection portion 32 of the terminal 12. The two electric wires 18 configured in this way are inserted into the predetermined terminal insertion holes 24 of the housing 16 of the connector 10 from the other side terminal connection portion 32 side, respectively, and pushed all the way in. As a result, the spring member 14 arranged at the mating terminal connection portion 32 of the terminal 12 is stably accommodated in the predetermined spring member accommodating portion 28 in the housing 16 as shown in FIG. That is, the tip end portion of the mating terminal connection portion 32 of the terminal 12 is engaged with the fitting hole 88 (see FIG. 2) provided on the tip end side of the housing 16, and the engagement protrusion 56a of the spring member retainer 52 is engaged. , 58a are fitted into the engagement holes 30 provided on the rear side of the spring member accommodating portion 28 of the housing 16. After that, the seal member 62 is arranged at a predetermined position of the electric wire 18, and the pair of

split retainers

64, 64 are attached to the rear side (right side in FIGS. 1 and 2) of the housing 16.

As a result, the engaging holes 82 provided in the hood portion 80 of the split retainer 64 are engaged with the engaging protrusions 90 provided at two locations on the side wall on the rear side of the housing 16. Then, the engaging hole 84 of the engaging piece 86 provided in the hood portion 80 of the split retainer 64 is engaged with the engaging projection 92 provided on the upper wall on the rear side of the housing 16. At the same time, the engaging protrusions 78 of the pair of

split retainers

64 and 64 are engaged with the engaging holes 74 provided in the engaging piece 76, and the ridges 71 and the grooves 72 are fitted. As a result, the pair of

split retainers

64, 64 are assembled to each other to complete the back retainer 20, which is fitted to the rear side of the housing 16. A pair of

split retainers

64 and 64 are assembled to each other and the split inner peripheral surfaces 66 are connected in the circumferential direction to form a tubular electric wire insertion hole 94. Here, as shown in FIG. 3, the hole diameter: R of the electric wire insertion hole 94 is larger than the outer diameter: r of the electric wire 18, and each electric wire pressing portion 70 projecting from each divided inner peripheral surface 66 is the electric wire 18. It has a height that protrudes inward in the radial direction from the outer surface of the cable. As a result, the electric wire 18 is held in a state of being pressed by the electric wire pressing portion 70 into the electric wire insertion hole 94. Further, the electric wire pressing portion 70 has an axial dimension: b larger than the circumferential dimension: a in the electric wire insertion hole 94.

According to the connector 10 of the present disclosure having such a structure, an electric wire insertion hole 94 is formed in the back retainer 20, and 3 is formed on the inner peripheral surface of the divided inner peripheral surface 66 constituting the electric wire insertion hole 94. The two electric wire pressing portions 70 are evenly distributed in the circumferential direction (see FIG. 5). Moreover, the hole diameter: R of the electric wire insertion hole 94 is larger than the outer diameter: r of the electric wire 18, and the electric wire pressing portion 70 protrudes inward in the radial direction from the outer surface of the electric wire 18. As a result, the electric wire 18 is held in a state of being pressed by the electric wire pressing portion 70 into the electric wire insertion hole 94. As a result, the electric wire 18 can be firmly and fixedly held with respect to the back retainer 20. Therefore, the back retainer 20 blocks the external force exerted from the electric wire 18 to the terminal 12 side due to the displacement such as the tension of the electric wire 18 due to the shaking of the electric wire 18 and the temperature change, and can be reliably dispersed to the housing 16. Then, it is possible to surely suppress or prevent the transmission of the external force to the terminal 12 in the connector 10. Therefore, the contact portion 44 of the terminal 12 with the mating terminal 21 swings, the plating wears, the contact resistance increases, and the contact portion 44 separates, causing problems such as sparks. Can be prevented. Moreover, the hole diameter: R of the electric wire insertion hole 94 is larger than the outer diameter: r of the electric wire 18, and the electric wire pressing portion 70 protrudes inward in the radial direction from the outer surface of the electric wire 18. Therefore, it is possible to surely bite the electric wire 18 into the insulating coating 42 of the electric wire pressing portion 70 while allowing the electric wire 18 to be deformed by the electric wire pressing portion 70. Further, it is possible to advantageously prevent the electric wire 18 from being displaced in the electric wire insertion hole 94.

The back retainer 20 is divided into a pair of

split retainers

64 and 64. As a result, when connecting the terminal 12 to the end of the electric wire 18 or accommodating the connected terminal 12 in the housing 16 of the connector 10, the work of inserting the electric wire 18 into the electric wire insertion hole 94 of the back retainer 20 in advance. Can be eliminated and workability can be improved. Moreover, in the present embodiment, since the split retainers have the same shape as each other, it is possible to reduce the cost required for mold and parts management. Further, since the hole diameter: R of the electric wire insertion hole 94 formed by connecting the divided inner peripheral surfaces 66 is larger than the outer diameter: r of the electric wire 18, the force required for assembling the pair of divided

retainers

64 and 64 is applied. It can be reduced, and the workability of assembling the pair of

split retainers

64, 64 is also improved.

In addition, since the six electric wire pressing portions 70 are separated from each other in the circumferential direction and evenly distributed in the electric wire insertion hole 94, the electric wire 18 can be held more stably and the displacement of the electric wire 18 is further stabilized. Can be suppressed. Moreover, since the electric wire pressing portion 70 has a hemispherical shape, the engagement allowance of the electric wire pressing portion 70 with the insulating coating 42 of the electric wire 18 is stabilized against an external force transmitted from the electric wire 18 in all directions. Can be secured.

Further, since the electric wire pressing portion 70 has an axial dimension: b larger than the circumferential dimension: a in the electric wire insertion hole 94, the increase in the assembling force required for the assembling work of the split retainer 64 is suppressed. It is possible to secure the holding force of the electric wire 18 with respect to the insulating coating 42.

<Other Embodiments>
The techniques described herein are not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included in the technical scope of the techniques described herein.

(1) In the above embodiment, the case where the back retainer 20 is divided into two divided retainers 64 has been described as an example, but the present invention is not limited to this, and the back retainer 20 may be divided into three or more. Further, two or more split retainers 64 may be hinged. Even in this case, the effect of improving workability is similarly exhibited.

(2) Further, at least one electric wire pressing portion 70 is sufficient, and the present invention is not limited to the example. For example, as in each division retainer 96 of the first modification shown in FIGS. 6 and 7, one electric wire pressing portion 70 is provided on one division inner peripheral surface 98a, and two on the other division inner peripheral surface 98b. The electric wire pressing portion 70 may be provided, and a total of three electric wire pressing portions 70 may be provided. In the electric wire insertion hole 94 formed by assembling the split retainers 96 of the first modification to each other, the three electric wire pressing portions 70 are evenly distributed in the circumferential direction.

(3) In the above embodiment, the shapes of the electric wire pressing portions 70 are the same as each other, but the shape is not limited to this. The shapes of the electric wire pressing portions 70 may be different from each other in consideration of the displacement state of the electric wire 18. Further, although the electric wire pressing portions 70 were evenly distributed in the circumferential direction, they may be unevenly distributed in consideration of the displacement state of the electric wire 18.

(4) In the above embodiment, the electric wire pressing portion has a hemispherical shape, but the present invention is not limited to this, and any shape can be adopted. For example, as in the split retainer 100 of the second modification shown in FIGS. 8 and 9, an electric wire pressing portion 104 having an arc cross-sectional shape extending in the length direction and having a rectangular shape in a plan view is adopted on the split inner peripheral surface 102. You may. The electric wire pressing portion 104 is not provided with a corner portion for the purpose of protecting the electric wire.

(5) In the above embodiment, an example in which the back retainer 20 is provided with two electric wire insertion holes 94 is shown, but the number of electric wire insertion holes 94 is not limited to this, and one or three or more electric wire insertion holes are provided. The technique of the present disclosure is similarly applicable to a back retainer having 94. Further, in a connector provided with a back retainer having a plurality of electric wire insertion holes 94, if at least one electric wire insertion hole 94 has the configuration of the present disclosure, it is included in the scope of the present disclosure.

(6) In the above embodiment, the back retainer 20 is responsible for preventing the seal member 62 from coming off from the electric wire 18, but the technique of the present disclosure also applies to a connector having a back retainer that does not have the seal member 62. It is applicable as well.

10 Connector 12 Terminal 14 Spring member 16 Housing 18 Electric wire 20 Back retainer 21 Mating side terminal 22 Mating side terminal insertion hole 24 Terminal insertion hole 26 Cavity 28 Spring member accommodating part 30 Engagement hole 32 Mating side terminal connection part 34 Core wire crimping part 36 Bottom wall 38 Crimping piece 40 Core wire 42 Insulation coating 44 Contact part 46a, b Pressing piece 48 Connecting part 50 Pressing point 52 Spring member retainer 54 Engagement hole 56 Upper spring member retainer split body

56a Engagement protrusion

56b Engagement protrusion 58 Below Side spring member retainer split body

58a Engagement protrusion

58b Engagement protrusion 62 Seal member 64 Divided retainer 66 Divided inner peripheral surface 70 Wire pressing part 71 Protrusion 72 Groove 74 Engagement hole 76 Engagement piece 78 Engagement protrusion 80 Hood part 82 Engagement hole 84 Engagement hole 86 Engagement piece 88 Fitting hole 90 Engagement protrusion 92 Engagement protrusion 94 Electric wire insertion hole 96 Divided retainer (modification example 1)
98a, b Divided inner peripheral surface 100 Divided retainer (Modification example 2)
102 Divided inner peripheral surface 104 Wire pressing part

Claims

The housing that houses the terminals and
A back retainer attached to the rear end of the housing from which the electric wire connected to the terminal is pulled out, and
A tubular electric wire insertion hole provided in the back retainer and
A wire pressing portion projecting from the inner peripheral surface of the wire insertion hole is provided.
A connector in which the hole diameter of the electric wire insertion hole is larger than the outer diameter of the electric wire, and the electric wire is held in a state of being pressed into the electric wire insertion hole by the electric wire pressing portion.
The back retainer is configured to include a plurality of split retainers.
Each split retainer has a split inner surface that partially constitutes the inner surface of the wire insertion hole.
The connector according to claim 1, wherein the divided retainers are assembled to each other so that the divided inner peripheral surfaces are connected in the circumferential direction to form the electric wire insertion hole.
The connector according to claim 2, wherein the back retainer includes a pair of the split retainers, and the split retainers have the same shape as each other.
The connector according to any one of claims 1 to 3, wherein a plurality of electric wire pressing portions are dispersedly arranged in the circumferential direction on the inner peripheral surface of the electric wire insertion hole.
The connector according to any one of claims 1 to 4, wherein the electric wire pressing portion has a hemispherical shape.
The connector according to any one of claims 1 to 5, wherein the electric wire pressing portion has an axial dimension larger than the circumferential dimension in the electric wire insertion hole.