JP2011187380A - Manufacturing method of female terminal and charging connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a terminal connection hole by cutting work without using a jig or the like. <P>SOLUTION: This is a manufacturing method of a female terminal 20 to manufacture the female terminal 20 from a round bar material CR having an axis extending in cross direction of the female terminal 20 which pinches a male terminal 60 by a plurality of contact members 22. The manufacturing method comprises a housing space forming process in which the round bar material CR is cut from the front end part to the rear and a housing space 25 to house the male terminal 60 is formed inside the round bar material CR, an annular projection forming process in which an annular projection 28 projecting from the inner circumference of the housing space 25 to the inside in diameter direction throughout the whole circumference is formed, a terminal connection hole forming process to form a terminal connection hole 27 by cutting a part of the annular projection 28, and a slit forming process in which, by forming a plurality of slits SL extending radially centered on the housing space 25, the round bar material CR with the housing space 25 formed is divided into a plurality of contact members 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a female terminal manufacturing method and a charging connector.

  2. Description of the Related Art Conventionally, as a female terminal that can fit a rod-shaped male terminal inside, for example, the one described in Patent Document 1 is known. The female terminal has a terminal accommodating portion that is formed in a substantially cylindrical shape and extends in the front-rear direction. The terminal accommodating portion is provided with a slit that is notched backward from the front edge thereof. The slits are formed by slitting, and a plurality of slits are arranged radially about the axis of the terminal accommodating portion. The terminal accommodating portion is divided into a plurality of contact pieces by these slits. When the male terminal is fitted inside the terminal accommodating portion, the male terminal is surrounded by each contact piece and is press-contacted, so that the male terminal and the female terminal are connected to be conductive.

  Such a female terminal is formed using a round bar as a base material. First, as shown in FIG. 11, the accommodation space 2 is formed inside the round bar 1, and the slit 3 is formed by cutting back from the front end of the round bar 1. By providing a plurality of slits 3, a plurality of contact pieces 4 are formed around the accommodation space 2. Next, as shown in FIG. 12, the base end portion of each contact piece 4 is bent inward, and the contact portion 5 is configured by the tip portion of each contact piece 4. Since the inner diameter of the contact portion 5 is smaller than the outer diameter of the male terminal, when the male terminal is fitted into the female terminal, each contact piece 4 is bent and deformed outward by the male terminal, and the elastic return of each contact piece is achieved. The male terminal is pressed by the contact portion 5 by force.

JP-A-9-63676

  However, in the above-described female terminal, since the contact portion 5 is formed by bending the base end portion of each contact piece 4 after the slit 3 is processed, the contact portion 5 is formed into a predetermined finished shape. Is difficult. That is, in the case of bending formation, even if the influence of springback or the like is taken into consideration, the finished shape tends to vary, and the contact area between the contact portion 5 and the male terminal may be reduced and the contact resistance may be increased.

  In addition, when the interval t between the contact pieces 4 in the contact portion 5 is defined as a standard value, if the base end portion of each contact piece 4 is bent, the variation in the interval t increases. It was difficult to produce a female terminal that conformed to the t standard. Thus, it is desirable to manufacture the terminal connection hole formed inside the contact portion 5 by cutting with high processing accuracy.

  However, after processing the slit 3 and bending the base end portion of each contact piece 4, if an attempt is made to cut the contact portion 5, a jig or the like is used so that each contact piece 4 is not bent outwardly and deformed. Therefore, it is necessary to perform cutting work, and it takes time to form the contact portion 5.

  The present invention has been completed based on the above circumstances, and an object thereof is to form terminal connection holes by cutting without using a jig or the like.

  The present invention is a female terminal that fits a male terminal into a terminal connection hole formed inside a plurality of contact pieces and bends the plurality of contact pieces outward while sandwiching the male terminal by these contact pieces. A female terminal manufacturing method for manufacturing a female terminal from a bar having an axial center extending in the front-rear direction, wherein a housing space in which the male terminal is accommodated is cut by rearward cutting from the front end of the bar. A housing space forming step formed inside, an annular projecting step for forming an annular projecting portion projecting radially inward from the inner circumferential surface of the housing space, and a part of the annular projecting portion are cut. The terminal connection hole forming step for forming the terminal connection hole, and the slit for dividing the bar in which the accommodation space is formed into the plurality of contact pieces by forming a plurality of slits extending radially around the accommodation space In a place with a manufacturing process with a forming process With a butterfly.

  If it does in this way, since a terminal connection hole can be formed by cutting an annular projection in a terminal connection hole formation process, a terminal connection hole can be formed with sufficient accuracy. Moreover, since the slit formation process is arrange | positioned after the terminal connection hole formation process, it is not necessary to control the bending of each contact piece using a jig | tool etc. when cutting an annular protrusion. Therefore, the terminal connection hole can be formed by cutting without using a jig or the like.

As an embodiment of the present invention, the following production method is preferable.
In the terminal connection hole forming step, a manufacturing method of cutting the protruding end portion of the annular protrusion using a drill having the same diameter as the terminal connection hole before the male terminal is fitted may be used.
If it does in this way, the female terminal suitable for a standard can be manufactured only by cutting using the drill of the same diameter as the hole diameter of the terminal connection hole before fitting of a male terminal.

In the annular protrusion forming step, a manufacturing method may be adopted in which the annular protrusion is formed at the approximate center in the front-rear direction on the inner peripheral surface of the housing space.
In this case, the sliding distance between the male terminal and the inner peripheral surface (contact portion) of the terminal connection hole can be made shorter than providing the terminal connection hole at the front end portion of the accommodation space.

In the annular protrusion forming step, the annular protrusion may be formed by bending the outer peripheral surface of the bar material radially inward over the entire circumference.
As a method of forming the annular protrusion, a method of cutting the inner peripheral surface of the accommodation space by boring is also conceivable. However, in this method, since it is necessary to cut all parts other than the annular protrusion on the inner peripheral surface of the accommodation space, it takes time to form the annular protrusion. In that respect, according to the bending process, it is only necessary to mold a portion corresponding to the annular protrusion on the outer peripheral surface of the bar, so that the annular protrusion can be easily formed.

  The present invention also relates to a charging connector that can be fitted to a vehicle-side connector provided in a vehicle, the female terminal manufactured by the above-described female terminal manufacturing method, and the terminal housing that houses the female terminal therein. It is good also as a structure provided with the part. That is, you may apply said female terminal to the connector for charge.

  According to the present invention, the terminal connection hole can be formed by cutting without using a jig or the like.

The longitudinal cross-sectional view which showed the state before making the vehicle side connector and the connector for charging fit in embodiment. A longitudinal sectional view showing a state after the vehicle side connector and the charging connector are fitted together Longitudinal sectional view showing the bar before forming the accommodation space Longitudinal sectional view showing the bar after forming the accommodation space Longitudinal sectional view showing a bar in a state where an annular protrusion is formed Longitudinal sectional view showing the bar in the state where the terminal connection hole is formed A longitudinal sectional view showing a female terminal completed by forming a plurality of slits Front view of female terminal AA line sectional view in FIG. Diagram showing the contact state between the contact and male terminal In the process of manufacturing a conventional female terminal, a longitudinal sectional view showing a state before bending A longitudinal sectional view showing a state after bending in a process of manufacturing a conventional female terminal

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. The charging connector 10 in the present embodiment has a pistol shape as a whole. As shown in FIG. 1, a connector main body 11 that constitutes a substantially front half portion, and a grip 12 that extends obliquely downward from the rear portion of the connector main body 11. Is formed. The connector body 11 and the grip 12 are both made of synthetic resin and are integrally formed. A hood portion 13 that is cylindrical and protrudes forward is mounted on the front surface of the connector main body 11. A lever 14 is accommodated on the upper side inside the connector main body 11, and a lock portion 14 </ b> A is formed at the front end portion of the lever 14. The lock portion 14 </ b> A is exposed to the outside from the upper front edge of the connector body 11.

  The hood 13 is formed as a separate member from the connector main body 11 and is fixed to the connector main body 11 by locking means (not shown). A plurality of terminal accommodating portions 15 having a cylindrical shape are provided inside the hood portion 13. These terminal accommodating portions 15 are provided so as to protrude forward from the back wall of the hood portion 13. A cavity 17 for accommodating the female terminal 20 is formed inside the terminal accommodating portion 15.

  The cavity 17 is configured to open rearward in the back wall of the hood portion 13. The cavity 17 is a space for accommodating the female terminal 20, and this space is constituted by the inner wall of the terminal accommodating portion 15. An insertion hole through which a male terminal 60 described later can be inserted is formed through the front wall of the cavity 17. Further, a water drain hole 16 </ b> A is formed through the lower surface of the front end of the inner wall of the cavity 17. The muddy water that has entered the inside of the terminal accommodating portion 15 is discharged to the outside through the drain hole 16A.

  A cylindrical rubber ring 18 is fitted inside the hood portion 13 along the inner peripheral surface of the hood portion 13, and a holder 19 that prevents the rubber ring 18 from coming off in front of the rubber ring 18. Is installed. The holder 19 has the same cylindrical shape as the rubber ring 18, and has a locking portion 19 </ b> A that can be locked on the inner surface side of the hood portion 13. The holder 19 is fitted along the inner peripheral surface of the hood portion 13 by the locking portion 19A.

  The mounting portion of the holder 19 on the inner peripheral surface of the hood portion 13 has a larger diameter than the back side of the rubber ring 18, and the holder 19 is attached to the inner peripheral surface of the holder 19 and the rubber ring 18. The inner peripheral surface of the hood part 13 on the back side is substantially flush with each other. The lip portion of the rubber ring 18 protrudes radially inward from the inner peripheral surface of the holder 19. On the other hand, the vehicle-side connector 50 has a vehicle-side housing 51 that can be fitted to the charging connector 10. The vehicle-side housing 51 is made of a synthetic resin and has a housing main body 51 </ b> A that can be fitted inside the hood portion 13. As a result, when the housing main body 51A is fitted into the hood portion 13, the outer peripheral surface of the housing main body 51A is brought into close contact with the lip portion of the rubber ring 18, and the connectors 10 and 50 are waterproofed.

  A vehicle-side cavity 52 that accommodates the male terminal 60 is formed inside the housing body 51A. The vehicle-side housing 51 is attached to a mounting opening 53 provided on the vehicle body side. A mounting plate 54 projects from the outer periphery of the vehicle-side housing 51, and the vehicle-side housing 51 is secured to the mounting opening 53 by bolting the mounting plate 54 toward the opening edge of the mounting opening 53. 53 is fixedly attached.

  A fitting tube portion 55 is provided around the outer periphery of the housing main body 51A. The fitting cylinder part 55 projects forward from the mounting plate 54, and the hood part 13 can be fitted between the housing body 51 </ b> A and the fitting cylinder part 55. A lock protrusion 56 is provided on the upper surface of the fitting cylinder portion 55. The lock projection 56 can be locked in the fitting direction with respect to the lock portion 14 </ b> A provided at the front end portion of the lever 14. Accordingly, when the connectors 10 and 50 are fitted together, the lock portion 14A is locked to the lock protrusion 56, whereby the connectors 10 and 50 are held in the fitted state. In addition, a grommet 57 extending rearward in a bellows shape is attached to the rear portion of the attachment opening 53.

  The male terminal 60 has a male side main body portion 61 having a rod shape, and a male side flange portion 62 is provided around the male side main body portion 61 so as to protrude from the outer peripheral surface of the male side main body portion 61. The male side flange portion 62 abuts against the rear wall of the vehicle side cavity 52 from behind, and the male side main body portion 61 is accommodated in the vehicle side cavity 52 through the rear wall. A male-side barrel portion 63 having a cylindrical shape is formed at the rear end portion of the male-side main body portion 61, and the core wire of the electric wire W is crimped and crimped inside the male-side barrel portion 63. Further, the heat shrinkable tube 58 is attached so as to cover the crimped portion of the male barrel portion 63. The heat-shrinkable tube 58 waterproofs the crimped portion of the male barrel portion 63. A vehicle-side retainer 59 is mounted on the rear portion of the vehicle-side housing 51 so as to prevent the male terminal 60 from coming out backward by engaging with the male-side flange portion 62 of the male terminal 60 from the rear. Yes.

  The electric wire W extends to the rear of the female terminal 20, and is pulled out through the connector body 11 and the grip 12. A plurality of electric wires W are arranged corresponding to the plurality of female terminals 20, and these electric wires W are covered with an outer sheath inside the grip 12 and are collected into one electric wire W <b> 1. The electric wire W <b> 1 is fixed inside the grip 12 by an electric wire grip ring (not shown) or the like, and is further fixed by a bush 40 at the rear end portion of the grip 12.

  Since the bush 40 is in close contact with the inner peripheral surface of the rear end opening of the grip 12 and the outer peripheral surface of the electric wire W1, water is restricted from entering the grip 12 from the rear end of the grip 12. . Since a plurality of drain holes 16B are formed on the lower surface side of the connector body 11 and the grip 12, even if water enters the inside of the connector body 11 and the grip 12, the drain holes 16B Water can be released to the outside.

  Next, the configuration of the female terminal 20 will be described in detail. The female terminal 20 has a substantially circular outer peripheral shape as shown in FIG. This female terminal 20 has a shape that is long in the front-rear direction, as shown in FIG. 7, and in the following description, the left side (left side) in the figure with reference to the main body 21 in FIG. The right side (right side) in the figure is the rear side (rear). As shown in FIGS. 7 to 9, the female terminal 20 is provided around a solid and cylindrical main body 21, three contact pieces 22 projecting forward from the main body 21, and an outer peripheral surface of the main body 21. And a barrel portion 24 projecting rearward from the main body portion 21 and the like.

  The flange portion 23 is configured to project radially outward from the outer peripheral surface of the main body portion 21 over the entire circumference. As shown in FIG. 1, the flange portion 23 abuts against the rear end opening edge of the cavity 17 from the rear. As a result, the female terminal 20 is stopped before being accommodated in the cavity 17. On the other hand, as shown in FIG. 7, the barrel portion 24 is formed in a cylindrical shape having a smaller diameter than the main body portion 21. By inserting and caulking the core wire exposed at the end of the electric wire W into the barrel portion 24, the female terminal 20 and the electric wire W are connected so as to be conductive. In addition, the electric wire visual recognition window 24A opened to the side is penetrated and formed in the front-end part of the barrel part 24. As shown in FIG. By visually recognizing the core wire from the electric wire visualizing window 24A, it can be confirmed that the electric wire W is inserted into the barrel portion 24 at a predetermined depth.

  An accommodation space 25 in which the male terminal 60 is accommodated is formed inside the contact pieces 22. That is, the accommodation space 25 is configured by the inner peripheral surface of each contact piece 22. Further, a contact portion 26 connected to the male terminal 60 is formed at the approximate center of the housing space 25 in the front-rear direction. A terminal connection hole 27 is formed on the radially inner side of the contact portion 26. When the male terminals 60 are fitted into the terminal connection holes 27, the contact pieces 22 are bent outward and deformed, and the male terminals 60 are sandwiched between the bent contact pieces 22. The terminal 60 is connected to be conductive. Such a female terminal 20 may be called by a name such as a slot terminal.

  The accommodating space 25 is a hole formed by cutting backward from the front end of the round bar CR with a drill (not shown) as will be described in detail later. For this reason, the inner diameter of the accommodation space 25 is the same from the front end 22B to the rear end 22A of the contact piece 22. Here, the round bar material CR is a base material for manufacturing the female terminal 20, and in the following description, the entire semi-finished product in the process of manufacturing the female terminal 20 is also called the round bar material CR. And

  The inner peripheral shape of the terminal connection hole 27 matches the outer peripheral shape of a drill (not shown) used to form the terminal connection hole 27. That is, the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted matches the outer diameter of the drill. In this case, since the terminal connection hole 27 can be formed by cutting, variation in the finished shape of the terminal connection hole 27 is reduced, and the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted is standardized. It becomes easy to manage as a value.

  As shown in FIG. 7, the contact piece 22 is provided so as to be able to bend in a direction in which the hole diameter t of the terminal connection hole 27 increases or decreases. That is, each contact piece 22 can be displaced in a direction in which the front end portion 22B side approaches and separates from each other with the rear end portion 22A side as a fulcrum. The outer diameter of the round bar CR in the accommodation space 25 is the same as the outer diameter of the round bar CR in the main body 21. A circumferential groove 22 </ b> C is provided at a position corresponding to the contact portion 26 on the outer peripheral surface of the contact piece 22. The circumferential groove 22C is formed due to a bending process described later.

  As shown in FIG. 9, the three contact pieces 22 are arranged side by side in the circumferential direction, and are partitioned from each other by three slits SL that extend radially around the accommodation space 25. That is, the round bar CR is divided into three contact pieces 22 by forming three slits SL. Each slit SL is formed by cutting out a range from the front end portion of the round bar CR to the front end portion of the main body portion 21 using a slot cutter or the like.

  The present embodiment is configured as described above. Next, a method for manufacturing the female terminal 20 will be described. First, as shown in FIG. 3, for example, a rod material CR is prepared in advance by cutting a rod material as a base material to form a main body portion 21, a flange portion 23, a barrel portion 24, and the like. When processing the accommodation space 25, a drill (not shown) is coaxially set in front of the round bar CR, and as shown in FIG. An open accommodation space 25 is formed (accommodation space forming step).

  Next, as shown in FIG. 5, the annular protrusion 28 is formed by bending the outer peripheral surface of the round bar CR having the accommodation space 25 radially inward over the entire circumference. Thereby, the protruding end portion of the annular protrusion 28 protrudes from the inner wall of the accommodation space 25 to the inside in the radial direction over the entire circumference, and the sectional shape of the annular protrusion 28 is a curved shape. As a result of the bending process, a circumferential groove 22C is formed on the outer circumferential surface of the round bar CR corresponding to the annular protrusion 28. In addition, the hole diameter of the forming hole 28A formed on the radially inner side of the annular protrusion 28 is set to be smaller than the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted (annular protrusion). Part forming step).

  Next, a drill (not shown) is coaxially set in front of the round bar CR, and this drill is moved into the housing space 25 and moved rearward. Thereby, the protruding end portion of the annular protrusion 28 is cut, and the terminal connection hole 27 is formed. As a result, a portion constituting the terminal connection hole 27 is formed as the contact portion 26. The cross-sectional shape of the contact portion 26 includes a straight portion SP (see FIG. 10) extending in the front-rear direction. The outer diameter of the drill is set to coincide with the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted. When the terminal connection hole 27 is formed by cutting as described above, the terminal connection hole 27 can be formed with high accuracy, and therefore the hole diameter t of the terminal connection hole 27 can be easily managed as a standard value (terminal connection hole forming step). .

  Thereafter, three slits SL are formed by notching the round bar CR having the terminal connection holes 27 in the front-rear direction using a slot cutter or the like. As a result, the front portion of the main body 21 in the round bar CR is divided into three contact pieces 22 by the three slits SL. During slit processing, no force in the bending direction is applied to each contact piece 22, and the hole diameter t of the terminal connection hole 27 does not vary. In other words, when the terminal connection holes 27 are formed in a state where the plurality of slits SL are formed and the plurality of contact pieces 22 can be bent, the free bending of each contact piece 22 is regulated using a jig or the like. It is necessary to process with. In that respect, in this embodiment, since the terminal connection hole 27 is formed before the slit processing, it is not necessary to use a jig or the like. Thereby, the female terminal 20 which conforms to the standard can be manufactured without using a jig or the like (slit forming step).

  The female terminal 20 is subjected to a surface treatment such as silver plating, and then connected to the terminal of the electric wire W and incorporated into the charging connector 10. On the other hand, the male terminal 60 is incorporated in the vehicle-side connector 50 that can be fitted to the charging connector 10. When the charging connector 10 is fitted to the vehicle-side connector 50, the male-side main body 61 of the male terminal 60 is inserted into the terminal connection hole 27, and the contact 26 is connected to the male-side main-body 61 as shown in FIG. Elastically contact. That is, while the contact portion 26 is in sliding contact with the male-side main body portion 61, each contact piece 22 is bent and deformed outward, and the terminal connection hole 27 is in an expanded state. In this state, the contact portion 26 is elastically brought into contact with the male main body portion 61 by the elastic restoring force of each contact piece 22. Thereby, the female terminal 20 and the male terminal 60 are connected so as to be conductive.

  As shown in detail in FIG. 10, the contact portion 26 has a configuration in which inclined portions IP are formed on both front and rear sides of the straight portion SP. In the initial stage of fitting the male terminal 60 into the terminal connection hole 27, the inclined portion IP is in sliding contact with the male terminal 60. On the other hand, during the fitting (state of FIG. 10), the straight line portion SP is in sliding contact with the male terminal 60, and the contact angle θ formed by the straight line portion SP and the male terminal 60 becomes smaller than the initial fitting time. For this reason, the fitting resistance at the time of fitting the male terminal 60 in the terminal connection hole 27 can be made smaller than the initial stage of fitting during the fitting.

  In the conventional structure shown in FIG. 12, each contact piece 4 is bent and deformed outward by fitting the male terminal into the accommodating space 2, and the contact angle between the front inclined portion of the contact portion 5 and the male terminal is fitted. It becomes larger than the initial stage. For this reason, unlike the present embodiment, the fitting resistance becomes larger than the initial fitting state during the fitting. On the other hand, in this embodiment, since the fitting resistance is smaller in the middle of the mating than in the initial mating, the peeling of the plating is less likely to occur due to the sliding between the female terminal 20 and the male terminal 60. Better than.

  As described above, in the present embodiment, since the terminal connection hole 27 is formed by cutting, the processing accuracy of the contact portion 26 can be increased. As a result, the hole diameter t of the terminal connection hole 27 in the contact portion 26 can be easily managed. Further, since the terminal connection hole 27 is formed before the slit processing, the female terminal 20 can be manufactured without using a jig or the like. Further, since the projecting end of the annular projection 28 is cut using a drill having the same diameter as the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted, the drill diameter of the drill to be used is the hole diameter t. The terminal connection hole 27 conforming to the standard can be easily formed simply by setting the same.

  Further, since the terminal connection hole 27 is formed at the approximate center in the front-rear direction in the accommodation space 25, the sliding distance between the male terminal 60 and the female terminal 20 when the male terminal 60 is fitted into the terminal connection hole 27 is increased. Can be shortened. As a result, plating peeling or the like can be hardly generated. Further, since the annular protrusion 28 is formed by bending the round bar material CR in which the accommodation space 25 is formed, the annular protrusion 28 is formed by cutting the inner peripheral surface of the accommodation space 25. It is possible to form the annular protrusion 28 more easily than when forming.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the female terminal 20 is formed in a substantially cylindrical shape in the above embodiment, the female terminal may be formed in a rectangular tube shape according to the present invention. That is, in the case where the male terminal is a tab terminal having a flat plate shape, it is not necessary to form the female terminal in a substantially cylindrical shape, and the female terminal may be formed in a substantially rectangular tube shape using a square bar material as a base material.

  (2) In the above embodiment, although it is a so-called three-divided terminal in which three contact pieces 22 are formed, according to the present invention, it may be a two-divided terminal, or may be a four or more divided terminal.

  (3) In the above embodiment, the drill having the same diameter as the hole diameter t of the terminal connection hole 27 before the male terminal 60 is fitted is processed, but according to the present invention, a drill having a diameter smaller than the hole diameter t is used. May be used for processing.

  (4) In the above embodiment, the terminal connection hole 27 is arranged at the approximate center in the front-rear direction on the inner peripheral surface of the accommodation space 25. It may be arranged on the side.

  (5) Although the annular protrusion 28 is formed by bending in the above embodiment, according to the present invention, the annular protrusion is formed by cutting the inner peripheral surface of the accommodation space 25 by boring or the like. Also good. If it does in this way, it is also possible to make the contact part 26 contact the male side main-body part 61 of the male terminal 60 in the whole surface.

  (6) Although the accommodation space 25 is formed coaxially with the round bar CR in the above embodiment, according to the present invention, the axis of the accommodation space 25 may not coincide with the axis of the round bar CR. Good. Similarly, the axis of the terminal connection hole 27 may not coincide with the axis of the round bar CR.

DESCRIPTION OF SYMBOLS 10 ... Charging connector 15 ... Terminal accommodating part 20 ... Female terminal 22 ... Contact piece 25 ... Accommodating space 26 ... Contact part 27 ... Terminal connection hole 28 ... Annular protrusion 50 ... Vehicle side connector 60 ... Male terminal CR ... Round bar material SL ... slit t ... hole diameter

Claims (5)

In a female terminal for fitting a male terminal into a terminal connection hole formed on the inside of a plurality of contact pieces and bending the plurality of contact pieces outward, and sandwiching the male terminal by these contact pieces, in the front-rear direction A female terminal manufacturing method for manufacturing the female terminal from a bar having an axis extending to
An accommodation space forming step of forming an accommodation space in which the male terminal is accommodated inside the rod by cutting backward from a front end portion of the rod, and
An annular protrusion forming step for forming an annular protrusion protruding radially inward from the inner peripheral surface of the housing space over the entire circumference;
A terminal connection hole forming step for forming the terminal connection hole by cutting a part of the annular protrusion, and
A method of manufacturing a female terminal, comprising: a slit forming step of dividing a bar in which the housing space is formed into the plurality of contact pieces by forming a plurality of slits extending radially around the housing space.   The said terminal connection hole formation process cuts the protrusion end part of the said annular protrusion using the drill of the same diameter as the hole diameter of the said terminal connection hole before the said male terminal fitting. The manufacturing method of the female terminal of description.   3. The method of manufacturing a female terminal according to claim 1, wherein in the annular projecting portion forming step, the annular projecting portion is formed substantially at the center in the front-rear direction on the inner peripheral surface of the housing space.   4. The annular protrusion is formed by bending the outer peripheral surface of the bar material radially inward over the entire circumference in the annular protrusion forming step. 5. A method for producing a female terminal according to claim 1. A charging connector that can be fitted to a vehicle-side connector provided in a vehicle,
A female terminal manufactured by the method of manufacturing a female terminal according to any one of claims 1 to 4,
A charging connector comprising a terminal accommodating portion for accommodating the female terminal therein.

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