JP2018185932A - Male terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress variation of the force for holding an insulation cap to the male side body.SOLUTION: A male terminal includes a male side body 20 having a hollow cylinder part 22 composed of a conductive member and opening in the cross direction, and a tabular lance 24 projecting inward from the rear end of the hollow cylinder part 22, and an insulation cap 40 having a cap body 41 composed of an insulating member, and projecting forward from the front end of the hollow cylinder part 22, a rod 42 elongating rearward from the rear end of the cap body 41 and penetrating the hollow cylinder part 22, and a concave lance housing part 43 provided in the rear of the rod 42, where the tip of the lance 24 and the inner wall of the lance housing part 43 are abutting.SELECTED DRAWING: Figure 5

Description

  The technique disclosed by this specification is related with a male terminal.

  A charging inlet device mounted on an electric vehicle or the like is provided with a male terminal fitted to a female terminal of a charging connector. Such a male terminal is provided with a resin cap at the tip to prevent the user from coming into direct contact with the conductive portion of the male terminal. As an example of such a male terminal, a male terminal described in JP-A-2014-63687 (the following Patent Document 1) is known. The male terminal includes a terminal body and an insulating member.

  The terminal body includes a terminal contact portion formed in a cylindrical shape having a rod through hole penetrating in the axial direction, and a wire connecting portion connected to the electric wire.

  The insulating member is made of a synthetic resin material, and penetrates the tip insulating portion protruding forward from the tip of the terminal contact portion and the rod through hole of the terminal contact portion of the terminal body, and protrudes to the rear end side of the rod through hole. It is comprised from the penetration rod part.

  In order to fix the insulating member to the terminal body, the rear end portion of the through rod portion of the insulating member is deformed by heat welding. Thereby, the rear end portion of the penetrating rod portion bulges in the radial direction, and the insulating member cannot be removed from the terminal body.

JP 2014-63687 A

  However, when fixing the insulating member to the terminal body, the rear end portion of the through rod portion of the insulating member is melted and deformed by heat, but it is difficult to deform the shape of the rear end portion in the same way for each product. As a result, variations occur in the shape of the rear end portion. As described above, when the shape of the rear end portion varies, the insulating member may be easily detached from the terminal body. For example, when the melted insulating member is biased inside the terminal body and solidified as it is, the insulating member is easily removed from the terminal body. Therefore, there is a problem that the holding force of the insulating member to the terminal body varies.

The male terminal disclosed in the present specification includes a hollow cylindrical portion made of a conductive member and opening in the front-rear direction, and a lance portion that protrudes inward from the rear end portion of the hollow cylindrical portion and forms a plate shape. A male main body having an insulating member, a cap main body projecting forward from a front end of the hollow cylinder, and extending rearward from a rear end of the cap main body and penetrating through the hollow cylinder And an insulating cap having a concave lance housing portion provided behind the rod portion, the tip of the lance portion and the inner wall portion of the lance housing portion abut against each other. It touches.
With this configuration, even if the insulating cap is pulled forward, the tip of the lance portion contacts the inner wall portion of the lance housing portion, so that the insulating cap is prevented from falling forward. Therefore, unlike the conventional case, it is not necessary to melt the rear end portion of the insulating cap by heat, so that variations in the shape of the insulating cap can be suppressed. Thereby, the dispersion | variation in the retention strength of an insulating cap can be decreased, and the installation which melt | dissolves the rear-end part of an insulating cap can be abolished.

The front end portion of the hollow cylindrical portion of the male side main body portion is provided with a rotation-preventing concave portion having a concave shape opened forward, and the insulating cap protrudes rearward from the rear end portion of the cap main body portion. An anti-rotation convex portion may be provided, and the anti-rotation concave portion and the anti-rotation convex portion may be fitted.
With this configuration, even if the insulating cap tries to rotate in the circumferential direction, the side surface of the locking convex portion of the insulating cap hits the side surface inside the locking concave portion of the male main body portion. Can be prevented.

Further, the lance portion protrudes obliquely rearward from the rear end portion of the hollow cylindrical portion,
Of the inner wall portion of the lance housing portion, a portion where the tip portion of the lance portion abuts may be a tapered surface.
When the insulating cap is pulled strongly forward, the tip end portion of the lance portion strongly hits the inner wall portion of the lance housing portion, and the inner wall portion is strongly pressed. Here, the stress (shear stress) from when the lance housing portion is pressed until shearing is proportional to the cross-sectional area during shearing (shear cross-sectional area), but as described above, the inner wall with which the tip of the lance portion contacts By making the portion tapered, the shear cross-sectional area increases compared to the case where the portion is not tapered. Accordingly, since the lance housing portion is difficult to shear, the holding force of the insulating cap can be improved.

  According to the male terminal disclosed in the present specification, it is possible to suppress variation in the holding force of the insulating cap to the male main body.

The top view of the male terminal in an embodiment Front view of male terminal AA sectional view of the male terminal before inserting the insulation cap AA sectional view of the male terminal after the insulation cap is inserted AA cross section of male terminal after insulation cap is fixed Top view of insulation cap Insulation cap rear view Insulation cap right side view Plan view of male terminal in reference example Bottom view of male terminal Front view of male terminal BB cross section of male terminal before insertion of insulation cap BB cross section of male terminal after insertion of insulation cap BB cross section of male terminal after fixing insulation cap Insulation cap right side view Insulation cap rear view

<Embodiment>
The present embodiment will be described with reference to FIGS.
The male terminal 10 in this embodiment includes a male side main body 20 and an insulating cap 40. The male main body 20 and the insulating cap 40 are configured separately as shown in FIG. In the following description, the X direction in FIG. 3 is the front and the Z direction is the upper.

  The male side main body portion 20 is formed by pressing and bending a plate-like conductive metal, and includes a hollow cylindrical portion 22 and an electric wire connecting portion 30 as shown in FIG.

  The hollow cylindrical portion 22 has a long hollow cylindrical shape that opens in the front-rear direction. A lance portion 24 and a cap holding base 26 are provided behind the hollow cylindrical portion 22. The lance part 24 is formed integrally with the hollow cylinder part 22 and has a plate shape, and projects obliquely rearward from the upper side of the rear end surface of the hollow cylinder part 22 inward.

  As shown in FIG. 3, the lance portion 24 is not bent inward before an insulating cap 40 described later is inserted into the hollow cylindrical portion 22. As shown in FIGS. 4 and 5, an insulating cap 40 to be described later is inserted through the hollow cylindrical portion 22 and then bent inward.

  As shown in FIG. 5, the cap holding base 26 has a plate shape and protrudes rearward from the lower side of the rear end surface of the hollow cylindrical portion 22. The cap holding base 26 is in contact with a rear portion 46 of an insulating cap 40 described later.

  As shown in FIG. 5, the electric wire connecting portion 30 is provided so as to protrude rearward from the rear end portion of the cap holding base 26 via an inclined portion 36 inclined downward. The electric wire connection part 30 is what is called an open barrel type, and is provided with the wire barrel part 32 and the insulation barrel part 34 in the front-back direction, respectively. Although not shown, an electric wire (not shown) is connected to the electric wire connecting portion 30, the wire barrel portion 32 is crimped to the core of the electric wire, and the insulation barrel portion 34 is crimped to the covering portion of the electric wire. Thereby, the electric wire which is not illustrated and the male terminal 10 are electrically connected.

  As shown in FIGS. 1 and 5, the front end portion of the hollow cylindrical portion 22 is formed with a rotation-recessing recess 28 having a concave shape opened forward.

  The insulating cap 40 is made of resin, and includes a cap body 41 and a rod-shaped rod 42 as shown in FIG. The cap main body 41 projects forward from the front end of the male main body 20. The rod portion 42 is formed to extend rearward from the rear end portion of the cap main body portion 41 and penetrates the hollow cylindrical portion 22.

  As shown in FIG. 5, a lance accommodating portion 43 having a groove shape is provided behind the rod portion 42 of the insulating cap 40. The inner wall portion of the lance accommodating portion 43 includes a flat bottom surface 47 that extends in the front-rear direction, a vertical surface 48 that stands upward from the front edge of the bottom surface 47, and a rear surface 44 that extends rearward from the rear edge of the bottom surface 47. The rear surface 44 of the lance accommodating portion 43 has a tapered shape that extends obliquely upward. The rear surface 44 of the lance accommodating portion 43 is in contact with the distal end portion of the lance portion 24 of the male main body portion 20.

  As shown in FIGS. 1 and 5, the cap main body 41 is provided with a rotation protrusion 45 that protrudes rearward from the rear end of the cap main body 41. The locking projection 45 and the locking recess 28 of the hollow cylinder 22 of the male main body 20 are fitted. As a result, even if the insulating cap 40 tries to rotate in the radial direction, the side surface of the locking projection 45 hits the side surface inside the locking recess 28, so that the rotation of the insulating cap 40 is prevented.

Next, the operation of this embodiment will be described.
As shown in FIGS. 3 to 4, the insulating cap 40 is inserted through the hollow cylindrical portion 22 of the male main body portion 20. Further, as shown in FIG. 5, the lance portion 24 is bent toward the inside of the hollow cylindrical portion 22.

  Next, when the insulating cap 40 is pulled forward, the distal end portion of the lance portion 24 of the male main body portion 20 comes into contact with the rear surface 44 of the lance accommodating portion 43 of the insulating cap 40. For this reason, the insulating cap 40 does not fall forward from the male main body 20. Thereby, the insulation cap 40 can be fixed to the male side main-body part 20 without melt | dissolving the rear-end part of an insulation cap with heat like the past. Therefore, variations in the shape of the insulating cap 40 can be suppressed, and variations in the holding force of the insulating cap 40 can be reduced.

  Further, when the insulating cap 40 is pulled strongly forward, the tip end portion of the lance portion 24 strongly hits the rear surface 44 of the lance accommodating portion 43 and the rear surface 44 is strongly pressed. Here, the stress (shear stress) from when the lance accommodating portion 43 is pressed until shearing is proportional to the cross-sectional area during shearing (shear cross-sectional area), but the tip of the lance portion 24 is applied as described above. By making the rear surface 44 in contact with the taper shape, the shear cross-sectional area increases as compared with the case where the rear surface 44 is not tapered. Therefore, since the lance accommodating portion 43 is difficult to shear, the holding force of the insulating cap 40 can be improved.

  As described above, according to the present embodiment, even when the insulating cap 40 is pulled forward, the distal end portion of the lance portion 24 abuts against the inner wall portion of the lance housing portion 43, so that the insulating cap 40 falls off forward. Is prevented. Therefore, unlike the prior art, it is not necessary to melt the rear end portion of the insulating cap by heat, so that variations in the shape of the insulating cap 40 can be suppressed. Thereby, the dispersion | variation in the retention strength of the insulation cap 40 can be decreased, and the installation which melt | dissolves the rear-end part of the insulation cap 40 can be abolished.

  In addition, even if the insulating cap 40 tries to rotate in the circumferential direction, the side surface of the locking projection 45 of the insulating cap 40 hits the side surface inside the locking recess 28 of the male main body 20, so that the rotation of the insulating cap 40 is prevented. Can be prevented.

  Further, when the insulating cap 40 is pulled strongly forward, the tip portion of the lance portion 24 strongly hits the inner wall portion of the lance housing portion 43 and the inner wall portion is strongly pressed. Here, the stress (shear stress) from when the lance accommodating portion 43 is pressed until shearing is proportional to the cross-sectional area during shearing (shear cross-sectional area), but the tip of the lance portion 24 is applied as described above. By making the inner wall portion in contact with the tapered shape, the shear cross-sectional area increases as compared with the case where the tapered sectional area is not tapered. Therefore, since the lance accommodating portion 43 is difficult to shear, the holding force of the insulating cap 40 can be improved.

<Reference example>
A reference example will be described with reference to FIGS.
As shown in FIG. 14, the male terminal 110 in the present reference example includes a male-side main body 120 and an insulating cap 140.

  As shown in FIG. 14, the male side main body 120 includes a hollow cylindrical portion 122 and a wire connecting portion 30 similar to the embodiment. The hollow cylindrical portion 122 has a long hollow cylindrical shape that opens in the front-rear direction. A plate-shaped bead plate 138 extending rearward is formed from the rear end portion of the hollow cylindrical portion 122 via a first inclined portion 136 inclined downward. The bead plate 138 is formed with a bead 139 protruding upward from the front end to the rear end of the bead plate 138.

  As shown in FIG. 14, the wire connecting portion 30 is provided so as to protrude rearward from a rear end portion of the bead plate 138 via a second inclined portion 137 that is inclined downward. Similar to the embodiment, an electric wire (not shown) is connected to the electric wire connecting portion 30.

  The insulating cap 140 is made of resin and includes a cap body 141 and a rod-shaped rod 142 as shown in FIG. The cap body 141 projects forward from the front end of the hollow cylinder 122. The rod portion 142 is formed to extend rearward from the rear end portion of the cap main body portion 141 and penetrates the hollow cylindrical portion 122.

  The rear end portion of the rod portion 142 before being inserted into the male main body portion 120 has a rod shape as shown in FIG. As shown in FIGS. 13 and 14, after the insulating cap 140 is inserted into the hollow cylindrical portion 122 of the male main body portion 120, the rear end portion of the rod portion 142 is melted by heat. As a result, the liquefied resin material enters the pair of grooves 143 formed on both sides of the bead 139, and the rear end portion of the rod portion 142 is solidified in this state.

Next, the operation of this embodiment will be described.
When the insulating cap 140 is pulled forward, the rear end portion of the rod portion 142 that has entered the pair of grooves 143 hits the first inclined portion 136. Thereby, the insulating cap 140 cannot be removed forward.

  As described above, since the bead 139 is provided on the bead plate 138, when the rear end portion of the rod portion 142 is melted by heat, the liquefied resin material is separated into the pair of grooves 143 formed by the bead 139. It is possible to prevent the resin material from being easily collected and deformed at one place. Variation in the shape of the rear end portion of the rod portion 142 is suppressed as compared with the case where the bead 139 is not provided (when the resin material gathers in one place). Therefore, variations in the holding force of the insulating cap 140 can be suppressed.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) The lance portion 24 in the embodiment is formed by bending the insulating cap 40 inward after passing through the male main body portion 20, but the lance portion 24 is bent inward in advance, The lance portion 24 may be bent when the insulating cap 40 is inserted into the male main body portion 20, and the lance portion 24 may enter the lance accommodating portion 43 of the insulating cap 40.
(2) Although the rear surface 44 of the lance accommodating portion 43 in the embodiment is tapered, for example, the lance accommodating portion is a square hole, and a taper is provided on the rear surface inside the lance accommodating portion. It is not necessary.
(3) Although the electric wire connection part 30 in the embodiment is an open barrel type, any structure may be used for connecting the electric wire to the electric wire connection part 30, for example, a closed barrel type.

DESCRIPTION OF SYMBOLS 10 ... Male terminal 20 ... Male side main-body part 22 ... Hollow cylinder part 24 ... Lance part 28 ... Anti-rotation recessed part 40 ... Insulation cap 41 ... Cap main-body part 42 ... Rod part 43 ... Lance accommodating part 45 ... Anti-rotation convex part

Claims (3)

A male tube main body having a hollow cylindrical portion made of a conductive member and opening in the front-rear direction; and a lance portion projecting inward from the rear end portion of the hollow cylindrical portion;
A cap main body portion made of an insulating member and projecting forward from the front end portion of the hollow cylinder portion; a rod-shaped rod portion extending rearward from the rear end portion of the cap main body portion and penetrating through the hollow cylinder portion; An insulating cap having a concave lance accommodating portion provided behind the rod portion,
The male terminal with which the front-end | tip part of the said lance part and the inner wall part of the said lance accommodating part are contact | abutting. The front end portion of the hollow cylindrical portion of the male side main body portion is provided with a rotation stopper recess having a concave shape opened forward,
The insulating cap is provided with a detent projection protruding backward from the rear end of the cap body,
The male terminal according to claim 1, wherein the rotation recess and the rotation protrusion are fitted. The lance part protrudes obliquely rearward from the rear end part of the hollow cylinder part,
The male terminal according to claim 1 or 2, wherein a portion of the inner wall portion of the lance housing portion where the tip portion of the lance portion abuts is a tapered surface.

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