JP2009245699A - Crimp terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp terminal capable of improving electrical connectivity and mechanical connectivity. <P>SOLUTION: A wire barrel part 10 for crimping core wires 102 of a covered electric wire 100 is formed of a barrel bottom part 11 on which the core wires 102 are placed, and wire barrel pieces 12 extending from both sides in the width direction Y of the barrel bottom part 11. The barrel bottom part 11 has a plurality of serrations 20 in the width direction Y which are arranged at a prescribed spacing in the longitudinal direction X. The serrations 20 are formed in groove shapes constituted of an anterior-facing side face 21, a posterior-facing side face 22, and a groove bottom face 23 to connect respective lower ends of the anterior-facing side face 21 and the posterior-facing side face 22. When the rear serration 20c on the base end side out of the plurality of arranged serrations 20 is crimped by a crimper 202, the inside starting position 31 of a base end-side bell mouth 30b out of bell mouths formed at the wire barrel piece 12 is arranged so as to be positioned between the anterior-facing side face 21c and the posterior-facing side face 22c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to, for example, a crimp terminal that is crimped to a conductor portion of a covered electric wire and attached to the tip of the covered electric wire.

Conventionally, as a terminal fitting to be attached to the tip of a covered electric wire, a crimp terminal provided with a crimping portion for crimping a conductor part with a sheath removed has been often used.
Specifically, the crimp terminal is composed of a terminal connection portion disposed on the distal end side in the longitudinal direction and a crimp portion disposed on the proximal end side in the longitudinal direction for crimping the conductor portion of the covered electric wire, and the crimp portion is The crimping bottom surface on which the conductor portion is placed, and a crimping piece called a wire barrel extending from both sides in the widthwise direction of the crimping bottom surface, and the crimping bottom surface is in the form of a groove in the width direction called serration. A plurality of grooves are provided at predetermined intervals in the longitudinal direction.

  The crimping terminal configured as described above can electrically and mechanically connect the terminal connecting portion and the conductor portion by crimping the conductor portion placed on the crimping bottom surface with a crimping piece.

  Even when the crimping portion is formed in a cylindrical shape and the crimping bottom surface is provided on the cylindrical inner surface, the conductor portion is inserted into the cylindrical shape and placed on the crimping bottom surface. The terminal connection portion and the conductor can also be electrically and mechanically connected by crushing and crimping from the outside.

  Further, by providing serrations on the crimping bottom surface, a part of the crimped conductor portion is deformed according to the groove shape of the serration, and the crimped conductor portion can be prevented from being pulled out from the crimping portion. That is, mechanical connectivity can be improved by serration.

  Further, by providing serrations on the crimping bottom surface, the conductor portion crimped to the crimping bottom surface by the crimping piece is deformed along the concave locking groove, so that the contact area increases and electrical resistance is low. Connection can be realized.

  However, in such a connection between the crimp terminal and the conductor part, if the crimping by the crimping piece is weak, the electrical resistance in the electrical connection with the conductor part increases, and conversely, if the crimping by the crimping piece is strong, the deformation that bites into the serration. As a result, the deformation load of the conductor increases, the strength of the conductor portion decreases, and there is a concern that the conductor portion may break at a load less than that required for use.

  Therefore, among the serrations arranged in the longitudinal direction, crimping to the extent that reliable electrical connectivity can be ensured by reducing the depth of the serration groove on the most proximal side where a lot of pulling load acts during use Even when crimping with a piece, a crimping method has been proposed that suppresses deformation load due to deformation that bites into the serration on the base end side and does not break with a load less than the strength necessary for use ( Patent Document 1).

By using the crimping method of Patent Document 1 above, it is possible to ensure good electrical connectivity and mechanical connectivity that is not likely to break with a load less than the strength required for use, but the conductor portion in the serration on the proximal side The deformation of the conductor was small, and it was not possible to sufficiently prevent the conductor portion that was crimped from being pulled out from the crimping portion.
Japanese Patent Laid-Open No. 2003-31274

  An object of this invention is to provide the crimp terminal which can improve electrical connectivity and mechanical connectivity.

  The present invention comprises a crimping portion for crimping a conductor portion of a covered electric wire, comprising a crimping bottom surface on which the conductor portion is placed and a crimping piece extending from both sides in the width direction of the crimping bottom surface. A plurality of widthwise locking grooves arranged at a predetermined interval in the longitudinal direction are provided, and the locking grooves are arranged at the distal side groove side surface and the proximal side groove side surface, and the lower ends of the distal side groove side surface and the proximal side groove side surface, respectively. A bell mouth formed on the pressure-bonding piece when a base-side locking groove is crimped by a crimping jig among a plurality of the locking grooves formed with a groove bottom surface to be connected. The crimping terminal is arranged such that the starting position on the inner surface side of the bell mouth on the base end side is located between the tip side groove side surface and the base end side groove side surface.

As an aspect of the present invention, the base-side groove side surface can be formed by an inclined side surface whose upper part is inclined toward the base end side.
As an aspect of the present invention, the groove bottom surface can be formed of a stepped bottom surface formed of a deep groove bottom surface on the distal end side and a shallow groove bottom surface on the proximal end side.

Further, as an aspect of the present invention, the locking groove can be arranged so that a starting position on the inner surface side of the base-side bell mouth is a position corresponding to the shallow groove bottom surface portion.
Moreover, as an aspect of the present invention, the side surface in the width direction that is the end portion in the width direction of the locking groove can be formed as a tapered surface.

The crimping part includes a crimping bottom surface and crimping pieces called barrel pieces arranged on both sides in the width direction of the crimping bottom surface. This includes a wire barrel of a closed barrel type having a substantially O-shaped rear view with the tip abutted upward. Note that the contact of the tip of the crimping piece includes a state joined by welding or the like, a contact state just contacted, or a substantially contact state with a slight gap.
The crimp terminal includes a connection terminal including the crimp part and a female connector BOX, a male connector BOX, or a terminal connection part such as a screw insertion hole, or a connection terminal constituted by only the crimp part. .

The covered electric wire is a covered electric wire in which a conductor portion in which a plurality of wires are made of pure copper, copper alloy, aluminum, or aluminum alloy is covered with an insulating covering, for example, a wire made of annealed copper wire A very thin covered electric wire having a conductor portion formed.
The said locking groove says the serration of the cross-sectional groove shape distribute | arranged to the width direction which is a substantially orthogonal direction with respect to a longitudinal direction.

The groove bottom surface includes a groove bottom surface configured with a flat surface or a curved surface having a constant depth, or a groove bottom surface configured with a flat surface or a curved surface in which the depth from the crimping bottom surface changes in the front-rear direction, and In addition, inflection points and break points exist in the middle of the longitudinal direction in the longitudinal cross-sectional direction, and it includes a groove bottom surface constituted by planes or curved surfaces sandwiching the inflection points and break points, or a combination thereof.
The longitudinal direction includes a direction connecting the base end side and the distal end side of the crimp terminal, and the width direction includes a direction orthogonal to the longitudinal direction and along the crimp bottom surface.

  The base end side includes a side on which a covered electric wire to be crimped is disposed in the longitudinal direction of the crimp terminal, and the distal end side is a side opposite to the base end side of the crimp terminal. In the case of a crimp terminal configured with a connection part, it is included on the terminal connection part side.

  Accordingly, the distal-side groove side surface is the side surface on the distal end side among the side surfaces that are long in the width direction constituting the groove shape of the locking groove in the width direction, and the proximal-side groove side surface is the side surface on the proximal side facing the distal-end side groove side surface. Including being.

The crimping jig includes a wire crimper that sandwiches a crimping piece together with an anvil in a crimping applicator.
When the crimping piece is curled with a wire crimper, the base-side bell mouth is a tapered bulge that is bent upward at the end of the crimping piece, and is a covered electric wire that is crimped at both ends of the crimping piece. This refers to the bell mouth formed at the end of the side. Thereby, it is prevented that the longitudinal direction end surface of the crimping piece bites into the conductor portion and damage is caused.

  The starting position of the inner surface side of the bell mouth on the base end side is an intersection point on the inner surface side of the crimping portion between the flat portion of the crimping portion and the tapered bell mouth, and the angle of the crimper that is a crimping jig It corresponds to a bending point that is bent by a portion, and is a bending point that is formed on the distal end side from the bending point on the outer surface side of the crimping portion.

  In this manner, the crimping portion for crimping the conductor portion of the covered electric wire in the crimp terminal is constituted by a crimping bottom surface on which the conductor portion is placed and a crimping piece extending from both sides in the width direction of the crimping bottom surface, A plurality of widthwise locking grooves arranged at predetermined intervals in the longitudinal direction are provided on the crimping bottom surface, and the locking grooves are arranged on the distal-side groove side surface and the proximal-side groove side surface, and on the distal-side groove side surface and the proximal-side groove side surface. Formed in a groove shape composed of a groove bottom surface connecting the lower ends of each, and formed on the crimping piece when a proximal-side locking groove is crimped with a crimping jig among the plurality of the locking grooves arranged By arranging the start position of the inner surface side of the bell mouth on the base end side of the bell mouth to be located between the tip side groove side surface and the base end side groove side surface, the conductor portion of the covered electric wire is crimped Crimping with to achieve a reliable electrical and mechanical connection It is possible.

  Specifically, since the engagement groove is provided on the crimping bottom surface, the conductor portion that is crimped to the crimping bottom surface by the crimping piece bites into the concave locking groove and is deformed. Fewer electrical connections can be realized. Moreover, the pulling-out resistance of the conductor part from a crimping | compression-bonding part can be increased by the deformation | transformation which digged into the latching groove of the conductor part.

  When a part of the crimped conductor part bites into the concave locking groove and deforms, a strong pressure is locally applied to the conductor part by the edge of the concave locking groove, and the conductor part is damaged. There is a possibility that the machine connectivity may be lowered, but when the base end side locking groove is crimped with a crimping jig among the plurality of the locking grooves arranged, the bell mouth formed on the crimping piece The start position of the inner surface side of the bell mouth on the base end side is located between the tip side groove side surface and the base end side groove side surface, so that by the edge portion of the concave base end side locking groove It is possible to prevent a strong pressure from being applied locally to the conductor portion.

  Specifically, the conductor part is crimped to the crimping bottom surface with a crimping piece between the distal bellmouth and proximal bellmouth, and the edge of the locking groove is placed in the crimping direction of the crimping piece when crimping. In such a case, the crimping force transmitted by the crimping piece is applied to the conductor portion as a strong local pressure by the edge portion, and the conductor portion may be damaged.

  However, when crimping with a crimping jig, the starting position on the inner surface side of the bell mouth on the proximal end side of the bell mouth formed on the crimping piece is located between the distal groove side surface and the proximal groove side surface. By arranging the locking groove on the base end side in such a way, it is possible to prevent the edge portion of the tip side groove side surface and the base end side groove side surface from applying a strong local pressure to the conductor part, and the connection with high mechanical connectivity Can be realized.

  In addition, a plurality of the locking grooves are arranged at predetermined intervals in the longitudinal direction of the crimping bottom surface, and among the plurality of the locking grooves, the locking groove on the proximal end side is connected to the side surface of the distal side groove and the base. By arranging so that the start position of the inner surface side of the bell mouth on the base end side is located between the side surfaces of the end groove, with respect to the deformed portion that bites into the lock groove on the base end side on which the drawing load acts most, Since it is possible to prevent a local load from acting on the edge portion on the side surface of the proximal end side groove, it is possible to realize a connection with high connection reliability with a high conductor holding force and a reduced possibility of breakage due to the pulling force.

  Further, in the deformed portion that bites into the locking groove other than the locking groove on the base end side, the edge portion in the locking groove applies a strong pressure locally to the conductor portion, and the oxidation generated on the surface of the conductor portion. Resistive substances such as objects can be removed, electrical connectivity can be improved, and the conductor holding force is high at the deformed portion of the locking groove on the base end side where the pulling load acts most, and the pulling force The risk of breakage is reduced.

  That is, in one crimping connection between the conductor portion and the crimping portion, among the plurality of latching grooves, the crimping grooves other than the base end side are securely crimped to ensure electrical connectivity, and the pulling load acts most. It is possible to realize a connection with high connection reliability that can secure the mechanical connectivity without breaking the pulling force and has a high conductor holding force in the locking groove on the base end side.

  Further, the proximal groove side locking groove is disposed so that the start position on the inner surface side of the bell mouth is located between the distal groove side surface and the proximal groove side surface. Since it is possible to prevent local load from acting on the conductor part due to the edge of the side surface of the side groove, good electrical connection even when the groove depth of the locking groove is formed with normal groove depth In addition to the mechanical properties, it is possible to ensure mechanical connectivity that is not likely to break with a load that is less than the strength required for use, and in addition, a connection with sufficient pull-out strength of the crimped conductor part, in other words, sufficient conductor holding force. Can be realized.

  In particular, when the conductor part is a very fine electric wire that is thinner than a conventional stranded wire, it is easily damaged and damaged by excessive local pressure. By arranging the locking groove on the base end side so that the starting position on the inner surface side is located between the side surface of the front end side groove and the side surface of the base end side groove, a strong local pressure is applied to the conductor portion that is an ultrafine wire. Since it can prevent giving, it is more preferable.

  In addition, since the base side groove side surface is formed by an inclined side surface whose upper part is inclined toward the base end side, the angle of the edge portion of the groove side surface is loosened, so that the edge portion having a loose angle acts on the conductor portion. The local load to be reduced can be further reduced, and further, the connection that improves the machine connectivity can be realized.

  Further, the groove bottom surface is formed by a stepped bottom surface composed of a deep groove bottom surface on the distal end side and a shallow groove bottom surface on the proximal end side, thereby forming a deep groove bottom surface portion on the distal end side. Ensuring sufficient tensile resistance by the deforming part that bites in, and reducing the deformation load by reducing the amount of biting deformation caused by the shallow groove bottom surface on the base end side where the pull-out load is likely to act, so the conductor holding power is high In addition, it is possible to realize a connection with high connection reliability with reduced fear of breakage with respect to the pulling force.

  Further, by arranging the locking groove so that the start position on the inner surface side of the bell mouth on the base end side corresponds to the shallow groove bottom surface portion, the deformation amount of the biting deformation is reduced. Since it is possible to prevent a local load due to the edge portion on the side surface of the proximal end side groove from acting on the deformed portion on the proximal end side in which the deformation load is reduced, the mechanical connectivity can be further improved.

  Further, by forming the side surface in the width direction that is the end portion in the width direction of the locking groove with a tapered surface, the burden on the conductor portion due to the deformation of the conductor portion in the vicinity of the end portion in the width direction of the locking groove is reduced. Can do.

  According to this invention, the crimp terminal which can improve electrical connectivity and mechanical connectivity can be obtained.

  An embodiment of the present invention will be described below with reference to the drawings.

  1 is an explanatory view of the crimp terminal 1 by a perspective view, FIG. 2 is an explanatory view of the crimp terminal 1 by a plan view, etc. FIG. 3 is an explanatory view for explaining a crimp method of the wire barrel portion 10. 4 shows an explanatory view of the crimp terminal 1 in a crimped state by a longitudinal sectional view, and FIG. 5 shows a performance graph showing the relationship between the crimp strength and the electric resistance value depending on the compression ratio of the wire barrel portion 10.

  1A shows a perspective view of the crimp terminal 1 divided at the center in the width direction, FIG. 1B shows a perspective view of the crimp terminal 1 and the covered electric wire 100 before crimping, and FIG. Shows a perspective view of the crimp terminal 1 in a crimped state.

2A shows a plan view of the crimp terminal 1 in a plate state before bending, FIG. 2B shows a plan view of the crimp terminal 1 subjected to bending, and FIG. 1 shows a longitudinal sectional view near the center in the width direction of the crimp terminal 1 subjected to bending.
4A is a cross-sectional view taken along line AA of the crimp terminal 1 shown in the cross-sectional position schematic diagram arranged in the vicinity of the center of FIG. 4, and FIG. Show.

  In the crimp terminal 1 of the present invention, the wire barrel portion 10 for crimping the core wire 102 of the covered electric wire 100 includes a barrel bottom portion 11 on which the core wire 102 is placed and a wire barrel piece extending from both sides of the barrel bottom portion 11 in the width direction Y. 12 and the barrel bottom 11 is provided with serrations 20 (20a, 20b, 20c) in the width direction Y.

  The serrations 20 formed in the groove shape formed by the front side surface 21 and the rear side surface 22 and the groove bottom surface 23 connecting the lower ends of the front side surface 21 and the rear side surface 22 are spaced apart in the longitudinal direction X at the barrel bottom 11. A plurality are arranged with a gap therebetween.

  The rear serrations 20c on the proximal side among the three serrations 20 arranged in the longitudinal direction X are bells formed at both ends of the wire barrel piece 12 in the longitudinal direction X when the wire barrel piece 12 is crimped by the crimper 202. The inner start position 31 of the base end side bell mouth 30b on the base end side of the mouse 30 is disposed between the front side surface 21c and the rear side surface 22c.

  The rear side surface 22c constituting the groove shape of the rear serration 20c is formed by an inclined side surface whose upper portion is inclined to the base end side, that is, rearward in the longitudinal direction X. Furthermore, the width direction side surface 24 which is the edge part of the width direction Y in each serration 20 is formed in the taper surface.

  The configuration of the crimp terminal 1 described above will be described in detail. The crimp terminal 1 includes a connector box 2 that allows insertion of a male connector (not shown) from the front to the rear in the longitudinal direction X, and the rear of the connector box 2. A wire barrel portion 10 disposed via a first transition 18 having a predetermined length, and an insulation barrel portion 15 disposed behind a wire barrel portion 10 via a second transition 19 having a predetermined length. Are integrally formed.

In addition, the wire barrel part 10 crimps and crimps | bonds the core wire 102 of the covered electric wire 100, and the insulation barrel part 15 caulks and fixes the insulation coating 101 of the covered electric wire 100.
In addition, with the recent reduction in size and weight of the covered electric wire 100, the core wire 102 is configured by bundling ultrafine electric wires that are thinner than conventional stranded wires.

  As shown in FIG. 2A, the crimp terminal 1 is three-dimensionally configured by bending from a plate state before assembly. The connector box 2 is formed of an inverted hollow square column body, and includes a contact piece 2a that is bent toward the rear in the longitudinal direction X and contacts the inserted male connector.

  As shown in FIG. 1B, the wire barrel portion 10 before crimping is composed of a barrel bottom portion 11 and wire barrel pieces 12 extending obliquely outward and upward from both sides in the width direction Y. The insulation barrel portion 15 which is formed in a U shape and is not crimped is also composed of a barrel bottom portion 17 and an insulation barrel piece 16 extending obliquely outward from both sides in the width direction Y. Is formed.

  The barrel bottom 11 of the wire barrel 10 has three serrations 20 (20a, 20b, 20c) in the width direction Y arranged at a predetermined interval in the longitudinal direction X as shown in part a of FIG. It has.

  The front serration 20a that is the most distal side of the three, that is, the connector box 2 side, and the central serration 20b that is disposed between the three are rectangular as shown in the enlarged view of part b in FIG. It has a cross-sectional groove shape.

  Specifically, the square cross-sectional groove shapes of the front serration 20a and the central serration 20b are concave shapes each formed by front side surfaces 21a, 21b and rear side surfaces 22a, 22b orthogonal to the barrel bottom 11 and groove bottom surfaces 23a, 23b. The groove shape has a quadrangular cross section in the longitudinal direction. In addition, each groove bottom face 23a, 23b is comprised by the surface parallel to the barrel bottom part 11 which connects the lower end of front side surface 21a, 21b and back side surface 22a, 22b.

  Of the three, the rearmost serration 20c, that is, the rear rear serration 20c has a groove width W in the longitudinal direction X that is about three times that of the front serration 20a and the central serration 20b, as shown in FIG. It has an inverted trapezoidal cross-sectional groove shape.

Specifically, the inverted trapezoidal cross-sectional groove shape of the rear serration 20c includes a front side surface 21c whose upper portion is inclined forward in the longitudinal direction X, a rear side surface 22c whose upper portion is inclined rearward in the longitudinal direction X, and the front side surface 21c and the rear side surface. 22c is a groove shape which is an inverted trapezoid whose section in the longitudinal direction is formed by a groove bottom surface 23c parallel to the barrel bottom 11 connecting the respective lower ends of 22c.
The groove depth D of the rear serration 20c is configured to be the same depth as the front serration 20a and the central serration 20b.

  In the state before crimping of the crimp terminal 1 configured as described above, the wire barrel portion 10 and the covered electric wire 100 are arranged as shown in FIG. 1B and crimped by the crimp applicator 200 shown in FIG. As shown in FIG. 1 (c), the core wire 102 is crimped by the wire barrel portion 10, and the crimp terminal 1 can be attached to the covered electric wire 100.

  Specifically, the covered electric wire 100 is placed from above the crimp terminal 1 so that the core wire 102 of the covered electric wire 100 is inside the wire barrel portion 10 and the vicinity of the front end of the insulating coating 101 is inside the insulation barrel portion 15. (See FIG. 1B), set on the anvil 201 of the crimping applicator 200 shown in FIG. 3 (see FIG. 3A).

  Then, as shown in FIG. 3 (b), the crimper 202 is lowered from above the wire barrel part 10, and the wire barrel part 10 is sandwiched between the anvil 201 and the crimper 202, as shown in FIG. The wire barrel piece 12 is curled.

  Simultaneously with the crimping of the wire barrel portion 10 described above, the crimper for the insulation barrel (not shown) is lowered from the top of the insulation barrel portion 15, and the anvil for the insulation barrel and the crimper for the insulation barrel are used for the insulation. The insulation barrel piece 16 is curled by sandwiching the insulation barrel portion 15.

  Thereby, the core wire 102 is pressed against the barrel bottom 11 by the wire barrel piece 12, and further, the insulation coating 101 is pressed against the barrel bottom 17 by the insulation barrel piece 16, and the double-clamped crimping state adjacent in the width direction Y is achieved. It can be configured (see FIG. 3C).

  Note that, by curling the wire barrel piece 12 by the crimper 202, tapered bell mouths 30 (30a, 30b) are formed at both ends in the longitudinal direction X of the wire barrel piece 12. And the position of the inner side starting position 31 of the base end side bell mouth 30b of the base end side in the longitudinal direction X is the front side surface 21c and the rear side surface in the rear serration 20c, as shown in the enlarged view of the part d in FIG. 22c.

  Thus, in the crimped state of the core wire 102 in the wire barrel portion 10, as shown in the enlarged view of the c portion in FIG. 4 (a) showing a sectional view in the longitudinal direction of the connected state, A biting deformation portion 103 (103a, 103b) protruding from the peripheral surface of the core wire 102 is formed by biting into the serration 20 and deforming.

  Specifically, the biting deformation portion 103a that bites into the front serration 20a and the central serration 20b is deformed into a quadrangular cross-sectional shape corresponding to the quadrangular cross-sectional groove shape of the front serration 20a and the central serration 20b, and protrudes to the bottom surface side of the core wire 102. It becomes.

Similarly, the biting deformation portion 103b formed by the rear serration 20c protrudes toward the bottom surface side of the core wire 102 with an inverted trapezoidal cross section corresponding to the above-mentioned inverted trapezoidal cross section groove shape.
It should be noted that the inner start position 31 of the proximal bell mouth 30b is positioned between the longitudinal direction X of the biting deformation portion 103b.

  Thus, the contact area between the barrel bottom 11 and the core wire 102 is formed by crimping the core wire 102 with the wire barrel piece 12 in the wire barrel portion 10 and forming the bite deformation portion 103 that bites into the serration 20 on the core wire 102. The electrical connectivity between the wire barrel portion 10 and the core wire 102 can be improved.

  Further, the biting deformation portion 103 that bites into the serration 20 can increase the resistance to the pulling direction of the core wire 102 with respect to the wire barrel portion 10, that is, the backward pulling force in the longitudinal direction X, thereby improving the mechanical connectivity. it can.

  Therefore, the electrical connectivity and mechanical connectivity as described above can be improved by the deformation of the core wire 102 due to the provision of the serrations 20 at the barrel bottom 11.

  Further, the rear serration 20c is arranged so that the inner starting position 31 of the proximal bellmouth 30b on the proximal side is located between the front side surface 21c and the rear side surface 22c in the rear serration 20c, Since the biting deformation portion 103b is formed in such an arrangement that the inner start position 31 of the base end side bell mouth 30b is located, in the biting deformation portion 103b to which the drawing force is most applied, a sufficient amount of the crimped conductor portion is sufficient. It is possible to realize a connection having a drawing strength, in other words, a sufficient conductor holding force.

  Specifically, when a part of the crimped core wire 102 bites into the concave serration 20 and is deformed, a strong pressure is locally applied to the core wire 102 by the edge portion of the concave serration 20 to damage the core wire 102. There is a risk that machine connectivity will be reduced.

  However, when the crimper 202 is crimped, the inner start position 31 of the proximal bell mouth 30b among the bell mouths 30 formed at both ends in the longitudinal direction X of the wire barrel piece 12 is between the front side surface 21c and the rear side surface 22c. By arranging the rear serration 20c so as to be located at the position, it is possible to prevent a strong pressure from being locally applied to the core wire 102 by the edge portion of the rear side surface 22c of the rear serration 20c. Therefore, it is possible to realize a connection with high mechanical connectivity.

  Further, since the rear serration 20c is arranged so that the inner start position 31 of the base end side bell mouth 30b is located between the front side surface 21c and the rear side surface 22c, the local load due to the edge portion of the rear side surface 22c can be reduced. The groove depth D of the rear serration 20c is formed to the same depth as that of the front serration 20a and the central serration 20b because it can be prevented from acting on the 102, but with good electrical connectivity and below the strength necessary for use. Therefore, it is possible to secure mechanical connectivity that is not likely to break with a load of, and in addition, it is possible to realize a connection having sufficient pull-out strength of the crimped conductor portion, in other words, sufficient conductor holding force.

  In order to explain this reason, the performance graph showing the relationship between the compression strength and the electrical resistance value depending on the compression ratio of the crimping portion of FIG. 5 shows the compression ratio on the right side of the graph (ratio of the sectional area after crimping to the original sectional area). ) Is high (that is, not very compressed), the crimping strength, that is, the pull-out strength of the conductor portion becomes high with a peak of about 90% and is excellent in mechanical connectivity, but has high electrical resistance and electrical connectivity. On the contrary, when the compression ratio on the left side of the graph is about 70% (that is, the amount of compression is increased), the electrical resistance value is lowered and the electrical connectivity is improved, but the drawing strength of the conductor portion is lowered. Has been shown to do.

  The above is a performance graph in the case of a copper wire, and the optimum value changes in the case of a copper alloy or an aluminum wire. However, there is a difference between the peak position of the tensile strength and the bottom position of the electrical resistance, and the former tends to come to the side with a higher compressibility.

  Also from this, in the biting deformation portion 103a that bites into the front serration 20a and the central serration 20b, by reducing the compression rate, that is, by increasing the compression amount, the electrical resistance value is lowered, the electrical connectivity is improved, and the compression is performed. The decrease in the pulling strength of the core wire 102 due to the increase in the amount is bitten by the rear serration 20c arranged so that the inner starting position 31 of the proximal bellmouth 30b is positioned between the front side surface 21c and the rear side surface 22c. The pulling strength of the core wire 102 is reinforced by increasing the compression rate of the deformable portion 103b.

  Thus, the wire barrel portion 10 of the crimp terminal 1 improves electrical connectivity by the biting deformation portion 103a of the front serration 20a and the central serration 20b, and improves mechanical connectivity by the biting deformation portion 103b of the rear serration 20c, A connection that can improve mechanical connectivity as well as electrical connectivity is realized by the biting deformation portion 103 that bites into the front serration 20a, the central serration 20b, and the rear serration 20c provided in the wire barrel portion 10.

  Further, by forming the groove depth D of the rear serration 20c to the same depth as the front serration 20a and the central serration 20b, the biting deformation portion 103b can secure a sufficient biting amount with respect to the rear serration 20c. Compared with the case where the groove depth of 20c is formed shallower than the front serration 20a and the central serration 20b, the pulling resistance can be improved.

  Furthermore, since the upper part of the front side surface 21c of the rear serration 20c is inclined toward the distal end side and the upper part of the rear side surface 22c is inclined toward the proximal end side, the angles of the edge portions of the front side surface 21c and the rear side surface 22c become loose. Further, the local load acting on the core wire 102 can be further reduced by the edge portion whose angle is loosened, and further, the connection that improves the mechanical connectivity can be realized.

  In addition, the local load by the edge part of the back side surface 22c by having arrange | positioned the back serration 20c so that the inner side starting position 31 of the base end side bellmouth 30b may be located between the front side surface 21c and the back side surface 22c is the core wire 102. In the case of the core wire 102 formed of a very fine electric wire that is easily damaged and damaged by excessive local pressure and is thinner than a conventional stranded wire, the drawing resistance is further improved. Of course, the same effect can be obtained even in a core wire made of a normal stranded wire.

  Moreover, since the width direction side surface 24 which is the edge part of the width direction Y in the serration 20 is formed in the taper side surface, the load by the deformation | transformation of the core wire 102 by the width direction side surface 24 of the left-right direction of the serration 20 is reduced. .

  Specifically, when the width direction side surface 24 is configured by an end surface orthogonal to the barrel bottom portion 11, the deformation of the core wire 102 in the vicinity of the width direction side surface 24 of the serration 20 is caused in the longitudinal direction X by the front side surface 21 and the rear side surface 22. In addition to the deformation, deformation in the width direction Y by the end surface orthogonal to the barrel bottom 11 is also applied, so that a load due to the deformation acts, and for example, there is a possibility of breaking due to application of a pulling force.

  However, by forming the width direction side surface 24 as a tapered side surface, the deformation in the width direction Y of the biting deformation portion 103 by the width direction side surface 24 becomes gentle, and the load due to the deformation in the width direction side surface 24 of the serration 20 is reduced. Can do. Therefore, a more reliable and stable mechanical connection can be realized.

  Furthermore, the above-described effect can be obtained even when the wire barrel piece 12 is a closed barrel type wire barrel that is substantially O-shaped in rear view in which the tip of the wire barrel piece 12 is in contact with the upper side in advance.

  6 is an explanatory view of the crimp terminal 1 ′ in a perspective view, FIG. 7 is an explanatory view of the crimp terminal 1 ′ in a plan view, etc., and FIG. 8 is an explanatory view in a longitudinal sectional view of the crimp terminal 1 ′ in a crimped state. Is shown.

  6A is a perspective view of the crimp terminal 1 ′ divided at the center in the width direction, and FIG. 6B is a perspective view of the crimp terminal 1 ′ and the covered electric wire 100 before crimping. c) is a perspective view of the crimp terminal 1 ′ in a crimped state.

FIG. 7A shows a plan view of the crimp terminal 1 ′ in a plate state before bending, and FIG. 7B shows a plan view of the crimp terminal 1 ′ subjected to bending. c) shows a longitudinal sectional view of the vicinity of the center in the width direction of the crimp terminal 1 ′ subjected to the bending process.
Further, FIG. 8A shows an AA cross-sectional view of the crimp terminal 1 ′ shown in the cross-sectional position schematic diagram arranged near the center of FIG. 8, and FIG. 8B shows a BB cross-section of the crimp terminal 1 ′. The figure is shown.

  In the crimp terminal 1 ′ of the present invention, the wire barrel portion 10 ′ for crimping the core wire 102 of the covered electric wire 100 extends from both the barrel bottom portion 11 ′ on which the core wire 102 is placed and the width direction Y of the barrel bottom portion 11 ′. It is comprised with the wire barrel piece 12 to take out, and the barrel bottom part 11 'is equipped with serrations 20' (20a, 20b, 20c ') in the width direction Y.

  A groove bottom surface 23 (23a, 23b, 23c ′) connecting the front side surface 21 (21a, 21b, 21c ′) and the rear side surface 22 (22a, 22b, 22c ′) and the lower ends of the front side surface 21 and the rear side surface 22 respectively. A plurality of serrations 20 ′ formed in the shape of a groove constituted by and are arranged at predetermined intervals in the longitudinal direction X of the barrel bottom 11 ′.

  Among the serrations 20 ′ arranged in the longitudinal direction X, the rear serration 20 c ′ on the proximal end side is formed by bell mouths 30 formed at both ends of the wire barrel piece 12 when the wire barrel piece 12 is crimped by the crimper 202. The base start side 31 of the base end side bell mouth 30b is disposed so as to be positioned between the front side surface 21c ′ and the second rear side surface 22cb ′.

  Further, the bottom surface of the rear serration 20c ′ is a stepped bottom surface 23c ′ composed of a deep groove bottom surface 23ca ′ in the front in the longitudinal direction X and a shallow groove bottom surface 23cb ′ in the rear in the longitudinal direction X. The rear serration 20c ′ is arranged so that the inner start position 31 of the base end side bell mouth 30b corresponds to the shallow groove bottom surface 23cb ′. Further, the width direction side surface 24 ′ that is the end portion in the width direction Y of each serration 20 ′ is formed by a tapered surface.

  The configuration of the crimp terminal 1 ′ described above will be described in detail. The crimp terminal 1 ′ includes the connector box 2, the wire barrel portion 10 ′, and the insulation barrel portion 15, as in the first embodiment. is doing. In addition, the covered electric wire 100 comprised by the insulation coating 101 and the core wire 102, the connector box 2, the first transition 18, the second transition 19, and the insulation barrel portion 15 in the crimp terminal 1 ′ are the same as those in the first embodiment. Detailed description is omitted because of the configuration.

  In addition, the barrel bottom portion 11 ′ of the wire barrel portion 10 ′ has three serrations 20 ′ (20a, 20b) in the width direction Y arranged at predetermined intervals in the longitudinal direction X, as shown in part a of FIG. 20c ′).

  The front serration 20a at the front end side of the three, that is, the connector box 2 side, and the central serration 20b disposed between the three are the front serration 20a of the crimp terminal 1 in the first embodiment. And since it is the same structure as the center serration 20b, detailed description is abbreviate | omitted.

  Of the three, the most proximal side, that is, the rear rear serration 20c ′ is from the front in the longitudinal direction X, from the front side 21c ′ in the substantially vertical direction perpendicular to the barrel bottom 11 ′, and from the lower end of the front side 21c ′. A deep groove bottom surface 23ca ′ directed rearward, a first rear side surface 22ca ′ directed upward from a rear end of the deep groove bottom surface 23ca ′, and a shallow groove bottom surface directed rearward from an upper end of the first rear side surface 22ca ′ 23cb ′ and a stepped groove shape constituted by a substantially vertical second rear side surface 22cb ′ orthogonal to the barrel bottom portion 11 ′ extending upward from the rear end of the shallow groove bottom surface 23cb ′.

Specifically, the front side surface 21c ′ is a vertical side surface disposed in front of the longitudinal direction X constituting the groove shape of the rear serration 20c ′ configured with the same groove depth D as the front serration 20a and the central serration 20b. is there.
The deep groove bottom surface 23ca ′ constitutes the front in the longitudinal direction X of the groove bottom surface of the rear serration 20c ′, is parallel to the barrel bottom portion 11 ′, and is the same longitudinal direction as the groove bottom surfaces 23 of the front serration 20a and the central serration 20b. The groove width W is X.
The first rear side surface 22ca ′ is configured in parallel to the front side surface 21c ′ and is configured to be approximately half as tall as the front side surface 21c ′.

  The shallow groove bottom surface 23cb ′ constitutes the rear of the groove bottom surface of the rear serration 20c ′ in the longitudinal direction X, is parallel to the barrel bottom portion 11 ′, and has a groove width W in the longitudinal direction X of the deep groove bottom surface 23ca ′. The length is about 4 times.

  The second rear side surface 22cb 'is configured to be parallel to the front side surface 21c' and has a height about half that of the front side surface 21c ', and the upper end serves as the barrel bottom 11'.

  Of the groove bottom surface of the rear serration 20c ′, the deep groove bottom surface 23ca ′ constituting the front in the longitudinal direction X and the shallow groove bottom surface 23cb ′ constituting the rear in the longitudinal direction X have a deep front and a rear It is formed by a shallow two-step step-shaped bottom surface 23c ′. Specifically, the front deep groove portion 20ca ′ constituted by the deep groove bottom surface 23ca ′ is constituted by the groove depth D and the groove width W in the longitudinal direction X similar to the front serration 20a and the central serration 20b, and the shallow groove bottom surface. The rear shallow groove portion 20cb ′ composed of 23cb ′ is half the groove depth D of the front serration 20a and the central serration 20b, and four times the groove width W in the longitudinal direction X of the front serration 20a and the central serration 20b. It consists of

Further, the rear serration 20c ′ is a position where the inner start position 31 of the base end side bell mouth 30b on the base end side of the bell mouth 30 formed at both ends of the wire barrel piece 12 corresponds to the shallow groove bottom surface 23cb ′. It arrange | positions so that it may become.
In addition, width direction side surface 24 'which is the edge part of the width direction Y in each serration 20' is formed in the taper surface.

  As described in the first embodiment, the crimp terminal 1 ′ thus configured is arranged with the wire barrel portion 10 ′ and the covered electric wire 100 as shown in FIG. 6B in the state before crimping. Then, by crimping with the crimp applicator 200 shown in FIG. 3, the core wire 102 is crimped with the wire barrel portion 10 ′ and the crimp terminal 1 ′ is attached to the covered electric wire 100 as shown in FIG. Can do.

  At this time, as described in the first embodiment, tapered bell mouths 30 (30a, 30b) are formed at both ends in the longitudinal direction X of the wire barrel piece 12, and the base end side bell mouth 30b on the base end side is formed. The rear serration 20c ′ is arranged so that the inner start position 31 of the rear side corresponds to the shallow groove bottom surface 23cb ′ portion of the rear serration 20c ′.

  Thus, in the crimped state of the core wire 102 in the wire barrel portion 10 ', as shown in the enlarged view of the portion c in FIG. The side bites into the serration 20 ′ and is deformed, and a biting deformation portion 103 ′ (103 a, 103 b ′) protruding from the peripheral surface of the core wire 102 is formed.

  Specifically, the biting deformation portion 103a that bites into the front serration 20a and the central serration 20b is a rectangular cross section corresponding to the square cross-sectional groove shapes of the front serration 20a and the central serration 20b, as with the biting deformation portion 103a in the first embodiment. It deforms in shape and protrudes to the bottom side of the core wire 102.

Similarly, the biting deformation portion 103b ′ due to the rear serration 20c ′ protrudes toward the bottom surface side of the core wire 102 with a stepped cross section corresponding to the stepped cross-sectional groove shape formed by the stepped bottom surface 23c ′. Become.
In addition, it forms in the arrangement | positioning that the inner side starting position 31 of the base end side bellmouth 30b is located between the longitudinal directions X of the biting deformation | transformation part 103b '. Specifically, the inner start position 31 of the base end side bell mouth 30b is located at a portion corresponding to the rear stepped deformed portion 103bb ′ having a small rearward protrusion amount in the biting deformed portion 103b ′.

  In this manner, the core wire 102 is crimped by the wire barrel piece 12 in the wire barrel portion 10 ′, and the bite deformation portion 103 ′ that bites into the serration 20 ′ is formed on the core wire 102, whereby the barrel bottom portion 11 ′ and the core wire 102 are formed. The contact area between the wire barrel portion 10 ′ and the core wire 102 can be improved.

  Further, the biting deformation portion 103 ′ that bites into the serration 20 ′ can increase the resistance in the drawing direction of the core wire 102 with respect to the wire barrel portion 10 ′, thereby improving the mechanical connectivity.

  Therefore, the electrical connectivity and the mechanical connectivity as described above can be improved by the deformation of the core wire 102 due to the serration 20 'provided at the barrel bottom 11'.

  Furthermore, the inner start position 31 of the base end side bell mouth 30b on the base end side is a shallow type among the stepped groove shapes formed by the stepped bottom surface 23c ′ composed of the deep groove bottom surface 23ca ′ and the shallow groove bottom surface 23cb ′. By arranging the rear serration 20c ′ so as to correspond to the groove bottom surface 23cb ′, the sufficient pulling strength of the crimped core wire 102, in other words, the biting deformed portion 103b ′ to which the pulling force is most applied, in other words, Then, a connection having a sufficient conductor holding force can be realized.

  Specifically, when a part of the crimped core wire 102 bites into the concave serration 20 ′ and deforms, a strong pressure is locally applied to the core wire 102 by the edge portion of the concave serration 20 ′, and the core wire 102 is damaged. As a result, the machine connectivity may be reduced.

  However, when the crimper 202 is crimped, the inner start position 31 of the base end side bell mouth 30b of the bell mouth 30 formed on the wire barrel piece 12 is rearward so as to be positioned corresponding to the shallow groove bottom surface 23cb ′. By arranging the serration 20c ′, it is possible to prevent a strong pressure from being locally applied to the core wire 102 by the edge portion of the second rear side surface 22cb ′ of the rear serration 20c ′.

  This is because when the wire barrel piece 12 is crimped by the crimper 202, the inner start position 31 of the base end side bell mouth 30b formed on the wire barrel piece 12 is positioned corresponding to the shallow groove bottom surface 23cb ′. By disposing the rear serration 20c ′, it is possible to prevent the edge portion of the second rear side surface 22cb ′ from being locally applied with a strong pressure on the core wire 102, and a connection with high mechanical connectivity can be realized.

  Further, the rear serration 20c ′ is composed of the front deep groove portion 20ca ′ having the same groove depth D and the same groove width W as the front serration 20a and the central serration 20b, and about half the groove depth D and about four times the groove width. Since the rear shallow groove portion 20cb ′ of W is configured, the rear serration 20c ′ has a compression rate that is similar to that of the front serration 20a and the central serration 20b. High, i.e. less compressed parts can be constructed.

  Specifically, in the same manner as the biting deformation portion 103a that bites into the front serration 20a and the central serration 20b, the compression rate is reduced in the front step-like deformation portion 103ba ′ of the front deep groove portion 20ca ′ in the biting deformation portion 103b ′ that bites into the rear serration 20c ′. By lowering, that is, by increasing the amount of compression, the electrical resistance value is lowered and the electrical connectivity is improved.

  Then, the decrease in the drawing strength of the core wire 102 in the front step-shaped deformed portion 103ba ′ is arranged so that the inner start position 31 of the base end side bell mouth 30b is positioned at a position corresponding to the shallow groove bottom surface 23cb ′. The pulling strength of the core wire 102 is reinforced by increasing the compression rate of the rear step-shaped deformed portion 103bb ′ of the rear shallow groove portion 20cb ′ in the serration 20c ′.

  Therefore, the wire barrel portion 10 ′ of the crimp terminal 1 ′ is electrically connected by the front step-shaped deformed portion 103ba ′ by the front deep groove portion 20ca ′ of the front serration 20a and the central serration 20b by the biting deformed portion 103a and the rear serration 20c ′. The mechanical connectivity is improved by the rear step-shaped deformed portion 103bb ′ by the rear shallow groove portion 20cb ′ in the rear serration 20c ′, and the front serration 20a, the central serration 20b, and the rear serration 20c ′ provided in the wire barrel portion 10 ′ are improved. In this way, connection that can improve mechanical connectivity as well as electrical connectivity is realized by the biting deformation portion 103 ′ that bites into the three.

  In the rear serration 20c ′, the rear side surface 22c ′ includes a first rear side surface 22ca ′ behind the deep groove bottom surface 23ca ′ and a second rear side surface 22cb ′ behind the shallow groove bottom surface 23cb ′. For example, the first rear side surface 22ca ′ and the second rear side surface 22cb are compared with a shallow wide locking groove configured with a groove width about six times that of the front serration 20a and the center serration 20b and a groove depth about a half. Since the biting deformed portion 103b is caught by ', the resistance to the pulling force can be improved.

  Note that the front side surface 21 and the rear side surface 22 of the front serration 20a and the central serration 20b, and the first rear side surface 22ca ′ of the front deep groove portion 20ca ′ of the rear serration 20c ′ are perpendicular to the barrel bottom portion 11 ′. Since the core wire 102 bites and deforms due to the formation of the side surface in the direction, the edge portion locally applies a strong pressure to the core wire 102, and a resistance substance such as an oxide generated on the surface of the core wire 102. It can be removed, and the electrical connectivity by the biting deformation portion 103a and the front step-shaped deformation portion 103ba ′ is further improved.

  In addition, since the width direction side surface 24 ′, which is the end portion in the width direction Y of the serration 20 ′, is formed as a tapered side surface, the load due to the deformation of the core wire 102 by the width direction side surface 24 ′ of the left and right direction of the serration 20 ′. Reduced and improved machine connectivity.

  It should be noted that the rear start serration 20c ′ of the rear serration 20c ′ formed by arranging the rear serration 20c ′ so that the inner start position 31 of the base end side bell mouth 30b corresponds to the shallow groove bottom surface 23cb ′. Since the edge portion can prevent the core wire 102 from being applied with a strong local pressure, the core wire is formed of a fine wire that is thinner than a conventional stranded wire that is easily damaged and damaged by excessive local pressure. In the case of 102, the drawing resistance can be further improved, but, of course, the same effect can be obtained even in a core wire constituted by a normal stranded wire.

  Further, the upper portion of the front side surface 21c ′ of the rear serration 20c ′ may be inclined toward the distal end side, and the upper portion of the second rear side surface 22cb ′ may be inclined toward the proximal end side, whereby the front side surface 21c ′ and the second rear side are inclined. Since the angle of the edge portion of the side surface 22cb ′ is relaxed, it is possible to further reduce the local load acting on the core wire 102 due to the loosened edge portion, and it is possible to realize a connection that improves mechanical connectivity. .

  Furthermore, the above-described effect can be obtained even when the wire barrel piece 12 is a closed barrel type wire barrel that is substantially O-shaped in rear view in which the tip of the wire barrel piece 12 is in contact with the upper side in advance.

In correspondence between the configuration of the present invention and the above-described embodiment,
The conductor portion of the present invention corresponds to the core wire 102,
Similarly,
The crimping part corresponds to the wire barrel part 10, 10 ′,
The crimping bottom surface corresponds to the barrel bottom 11, 11 ′,
The crimping piece corresponds to the wire barrel piece 12,
The locking grooves correspond to serrations 20, 20 ′, forward serrations 20a, 20a ′, central serrations 20b, 20b ′, and rear serrations 20c, 20c ′.
The tip side groove side surface corresponds to the front side surfaces 21, 21 c, 21 c ′,
The proximal-side groove side surface corresponds to the rear side surface 22c ′, the first rear side surface 22ca ′, and the second rear side surface 22cb ′.
The crimping jig corresponds to the crimper 202,
The start position on the inner surface side corresponds to the inner start position 31,
The tip side corresponds to the front side in the longitudinal direction X,
Although the base end side corresponds to the rear side in the longitudinal direction X, the present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

Explanatory drawing by the perspective view of a crimp terminal. Explanatory drawing of a crimp terminal. Explanatory drawing explaining the crimping | compression-bonding method of a wire barrel part. Explanatory drawing by the longitudinal cross-sectional view of the crimp terminal in the crimped state. The performance graph which shows the relationship between the crimping | compression-bonding intensity | strength by the compression rate of a wire barrel part, and an electrical resistance value. Explanatory drawing by the perspective view of the crimp terminal of 2nd Example. Explanatory drawing of the crimp terminal of 2nd Example. Explanatory drawing by the longitudinal cross-sectional view of the crimp terminal of the crimped state of 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1 '... Crimp terminal 10, 10' ... Wire barrel part 11, 11 '... Barrel bottom part 12 ... Wire barrel piece 20, 20' ... Serration 20a, 20a '... Front serration 20b, 20b' ... Central serration 20c, 20c '... rear serrations 21, 21c, 21c' ... front side surface 22, 22c, 22c '... rear side surface 23c' ... stepped bottom surface 23ca '... deep groove bottom surface 23cb' ... shallow groove bottom surface 30b ... proximal end bell mouth 31 ... Inner start position 202 ... Crimper X ... Longitudinal direction Y ... Width direction

Claims (5)

The crimping part that crimps the conductor part of the covered wire
It comprises a crimping bottom surface for placing the conductor portion, and a crimping piece extending from both sides in the width direction of the crimping bottom surface,
The crimping bottom surface includes a plurality of widthwise locking grooves arranged at predetermined intervals in the longitudinal direction,
The locking groove is formed in a groove shape constituted by a tip side groove side surface and a base end side groove side surface, and a groove bottom surface connecting the respective lower ends of the tip end side groove side surface and the base end side groove side surface,
Among the plurality of the locking grooves, the locking groove on the base end side is
When crimping with a crimping jig, the starting position on the inner surface side of the bell mouth on the proximal end side of the bell mouth formed on the crimping piece is positioned between the distal groove side surface and the proximal groove side surface. Crimp terminal placed in The crimp terminal according to claim 1, wherein the base-side groove side surface is formed by an inclined side surface with an upper portion inclined toward the base-end side. The groove bottom,
The crimp terminal according to claim 1 or 2, comprising a stepped bottom surface comprising a deep groove bottom surface on the distal end side and a shallow groove bottom surface on the proximal end side. The crimp terminal according to claim 3, wherein the locking groove is arranged so that a starting position on the inner surface side of the bell mouth on the base end side is a position corresponding to the shallow groove bottom surface portion. A side surface in the width direction that is an end in the width direction in the locking groove,
The crimp terminal according to claim 1, wherein the crimp terminal is formed with a tapered surface.

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