JP5505548B2 - Manufacturing method of female terminal - Google Patents

Description

  The present invention relates to a method for manufacturing a female terminal.

  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. As shown in FIG. 23, the terminal connection hole 2 is formed inside the round bar 1, and the slit 3 is formed by notching backward 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 terminal connection hole 2. Next, as shown in FIG. 23, each contact piece 4 is drawn to bend the base end portion of each contact piece 4 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 female terminals, the contact portions 5 are formed by drawing each contact piece 4, so that the finished shape of the contact portions 5 may be broken. That is, in order to obtain a predetermined finished shape by drawing, variations in the finished shape are likely to occur even when the influence of springback or the like is taken into consideration. For this reason, 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 distance t between the contact pieces 4 in the contact portion 5 is managed as a standard value, if the contact pieces 4 are drawn, the variation in the distance t is increased, so that the standard of the distance t is met. It was difficult to produce a female terminal. Thus, in manufacturing a female terminal, a manufacturing method that is formed only by cutting with high processing accuracy has been desired.

  Further, in the above female terminal, the space for separating the contact pieces adjacent in the circumferential direction is composed only of slits, and the slits are elongated in the front-rear direction, so that they are surrounded by a plurality of contact pieces. When foreign matter enters the storage space, it is difficult to discharge the foreign matter through the slit. For this reason, foreign matter may accumulate in the accommodation space, and connection reliability may be reduced.

  The present invention has been completed on the basis of the above circumstances, and even when foreign matter enters the inside of the accommodation space surrounded by the plurality of contact pieces, the foreign matter is easily discharged to the outside. The purpose is to do.

  The present invention is a method of manufacturing a female terminal that is formed by cutting a bar extending in the front-rear direction and is fitted inside with a male terminal sandwiched between a plurality of contact pieces, and is opened at the side of the bar A horizontal hole forming step for providing a horizontal hole, a slit forming step for dividing the bar into a plurality of contact pieces by providing a plurality of slits arranged radially about the axis of the bar, and a plurality of contact pieces A terminal that communicates with the horizontal hole from the front end of the bar in a state where a jig that is opposed to the gap is set on the outer surface side, and a plurality of contact pieces are bent into the gap and brought into contact with the jig The manufacturing method includes a terminal connection hole forming step of forming a contact portion for the male terminal by penetrating the connection hole.

  According to such a manufacturing method, a horizontal hole is formed in the horizontal hole forming step, a plurality of slits are provided in the slit forming step to divide the bar into a plurality of contact pieces, and a terminal connection hole is formed in the terminal connecting hole forming step. By providing, a contact part can be formed. Therefore, the processing accuracy of the contact portion can be increased by forming the female terminal only by cutting.

The following configuration is preferable as an embodiment of the present invention.
The terminal connection hole may be provided using a drill having the same diameter as the outer diameter of the male terminal.
According to such a configuration, when the cross-sectional shape of the male terminal is a perfect circle, the inner peripheral shape of the terminal connection hole and the outer peripheral shape of the male terminal can be matched. That is, the state in which the terminal connection hole is processed by the drill reproduces the state in which the male terminal is fitted in the terminal connection hole. Therefore, the contact portion can be brought into contact with the male terminal over the entire surface.

The displacement amount at which the plurality of contact pieces are bent and displaced in the gap may correspond to the displacement amount at which the plurality of contact pieces are bent and displaced when the male terminal is elastically sandwiched.
According to such a configuration, the displacement amount of the contact piece can be managed by setting the size of the gap.

Before the slit forming step, a guide hole forming step of forming a guide hole in the front end portion of the bar may be provided, and the terminal connecting hole may be provided in the terminal connecting hole forming step.
If it does in this way, a male terminal can be guided to a contact part by a guide hole. Further, by forming the terminal connection hole with respect to the guide hole formed in advance, the time required for forming the terminal connection hole can be shortened.

  Further, as an embodiment of the present invention, a female terminal that fits inside with a plurality of contact pieces sandwiching a male terminal, the plurality of contact pieces are provided to protrude from the main body portion in an opposing state. The male terminal is housed in a housing space surrounded by a plurality of contact pieces, and the housing space is configured mainly with a plurality of lateral holes that open to the side. The surface forming the hole may have a configuration in which a cross-sectional shape obtained by cutting the surface with a cutting surface intersecting with the axis of the main body is a straight line.

  According to such a configuration, since the horizontal hole is opened to the side, it is easy to discharge the foreign substance from the horizontal hole to the outside even when the foreign substance enters the inside of the accommodation space. Moreover, since the cross-sectional shape of the horizontal hole in the direction crossing the main body is a straight line, the horizontal hole can be formed using, for example, a drill.

The horizontal hole may be configured to pass through the front portion of the main body portion in a direction intersecting the axis of the main body portion.
According to such a structure, since a large horizontal hole is formed, it becomes easy to discharge | emit a foreign material further outside, and it becomes easier to form a horizontal hole by cutting.

The horizontal hole may have a long hole shape extending in the axial direction of the main body.
According to such a structure, a horizontal hole can be utilized as a part of space which isolate | separates adjacent contact pieces.

The plurality of lateral holes may be configured to correspond to a space separating the contact pieces adjacent in the circumferential direction.
According to such a structure, a horizontal hole can be utilized as a space which isolate | separates the contact piece adjacent to the circumferential direction.

  According to the present invention, even when a foreign object enters the inside of the accommodation space surrounded by the plurality of contact pieces, the foreign object can be easily discharged to the outside.

The perspective view of the female terminal in Embodiment 1 Top view of female terminal Front view of female terminal AA line sectional view in FIG. Side view of female terminal BB sectional view in FIG. FIG. 4 is a cross-sectional view corresponding to FIG. 4 before a horizontal hole is formed in a round bar. Sectional drawing which shows the state which formed the horizontal hole in the round bar of FIG. Sectional drawing which shows the state which set the round bar of FIG. 8 to the jig | tool FIG. 9 is a cross-sectional view showing a state in which a terminal hole is processed by inserting a drill into the guide hole after a guide hole is formed in the round bar of FIG. Sectional drawing which shows the state which extracted the drill from the terminal connection hole of FIG. Front view of a round bar showing a state where guide holes are formed Front view of a round bar with terminal connection holes formed Front view of a female terminal showing a state in which both arc surfaces are in full contact with the male terminal FIG. 10 is a cross-sectional view corresponding to FIG. 10 before the drill is inserted into the guide hole in the second embodiment. Sectional drawing which shows the state which sets the round bar material of FIG. 15 to the jig by the side of a drill, and inserts a drill in a guide hole, and is processing the terminal connection hole Sectional drawing which shows the state which extracted the drill from the terminal connection hole of FIG. The perspective view of the female terminal in Embodiment 3. Sectional drawing which cut | disconnected the horizontal hole of FIG. 18 with the cut surface orthogonal to the axial center direction of a main-body part. The perspective view of the female terminal in Embodiment 4. The front view of the female terminal which shows the state which a part of both circular arc surfaces contacted the small diameter male terminal in other embodiment Sectional drawing which shows the state before performing drawing processing to each contact piece in the past Sectional drawing which shows the state after performing drawing processing to each contact piece in the past

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the female terminal 10 in the first embodiment has a substantially circular outer peripheral shape. As shown in FIG. 2, the female terminal 10 has a shape that is long in the front-rear direction. In the following description, the left side (left side) in the figure is defined as the front side (front side) with respect to the main body 11 and the right side (in the figure) The right side is the rear side (rear). As shown in FIG. 5, the female terminal 10 includes a main body portion 11 disposed in the center portion in the front-rear direction, a pair of contact pieces 12 projecting forward from the main body portion 11, and a rear end edge of the main body portion 11. And a barrel portion 14 that protrudes rearward from the main body portion 11 and the like.

  As shown in FIG. 3, the flange portion 13 is configured to project radially outward from the outer peripheral surface of the main body portion 11 over the entire circumference. The flange portion 13 comes into contact with a rear end opening edge portion of a cavity (not shown) in which the female terminal 10 is accommodated from the rear. Thereby, the female terminal 10 is stopped in the state accommodated in the cavity. On the other hand, as shown in FIG. 4, the barrel portion 14 is composed of a small-diameter portion 14A having a diameter smaller than that of the main body portion 11 and a cylindrical portion 14B formed rearward from the small-diameter portion 14A. By inserting and caulking the core wire exposed at the end of an electric wire (not shown) into the cylindrical portion 14B, the female terminal 10 and the electric wire are connected so as to be conductive. A drain hole 14C that opens to the side is formed through the front end of the cylindrical portion 14B.

  Between both the contact pieces 12, an accommodation space 15 in which a male terminal 80 (see FIG. 14) having a round bar shape is accommodated is formed. That is, the accommodation space 15 is configured by the opposed surfaces of the both contact pieces 12. Further, a terminal connection hole 16 for connecting both contact pieces 12 and the male terminal 80 is formed on the inner surface side at the front end portions of the both contact pieces 12. Further, a guide hole 17 is formed on the front side of the terminal connection hole 16 so that the front opening becomes wider toward the front. The accommodation space 15 is opened forward via the terminal connection hole 16 and the guide hole 17.

  As shown in FIG. 5, the accommodation space 15 is formed with a lateral hole 18 having a long hole shape extending in the front-rear direction as a main part. The accommodation space 15 includes a lateral hole 18, a terminal connection hole 16, and a guide hole 17. The lateral hole 18 is a hole formed by penetrating both side portions of the round bar CR with a drill as will be described in detail later. Here, the round bar material CR is a base material for manufacturing the female terminal 10, and in the following description, the entire semi-finished product in the process of manufacturing the female terminal 10 is referred to as a round bar material CR. To do.

  In this embodiment, although it forms as the single horizontal hole 18 in the form which penetrates the both sides of the round bar CR, in fact, it is on the left and right sides of the round bar CR around the axis of the main body 11. Since a pair of open side holes 18 are formed, and these side holes 18 are processed at once by a drill, it seems that only a single side hole 18 is formed. Therefore, in the case of the female terminal 10 of the present embodiment, that is, the split terminal provided with the pair of contact pieces 12, it is necessary to form the two lateral holes 18, but the lateral holes 18 can be formed at a time. In the following description, both lateral holes 18 may be abbreviated as horizontal holes 18.

  The surface S constituting the lateral hole 18 in the contact piece 12 has a straight cross-sectional shape obtained by cutting this surface along a cut surface (cross section taken along line BB in FIG. 5) that intersects the axis of the main body 11. That is, in the present embodiment, as shown in the cross-sectional view of FIG. 6, the upper and lower surfaces S constituting the horizontal hole 18 have a planar shape.

  As illustrated in FIG. 13, the terminal connection hole 16 includes a pair of upper and lower circular arc surfaces CS, and a contact portion with respect to the male terminal 80 is configured by both the circular arc surfaces CS. Both circular arc surfaces CS coincide with the outer peripheral shape of the drill DR for machining the terminal connection hole 16. Furthermore, in this embodiment, since the outer diameter of the drill DR and the outer diameter of the male terminal 80 are the same, both circular arc surfaces CS also coincide with the outer peripheral shape of the male terminal 80. For this reason, as shown in FIG. 14, when the male terminal 80 is fitted into the terminal connection hole 16, both arc surfaces CS are arranged on the same circumference, and the contact portion constituted by both arc surfaces CS is the male terminal 80. Touch the entire surface.

  As shown in FIGS. 1 and 4, the guide hole 17 has a tapered shape that opens forward, and the tip of the male terminal 80 can be guided to the terminal connection hole 16. As shown in FIG. 12, the guide hole 17 is recessed in a mortar shape at the front end of the round bar CR and communicates with the lateral hole 18. The guide hole 17 is formed by performing a cutting process such as boring on the front end of the round bar CR.

  As shown in FIG. 4, the contact piece 12 is provided so as to be able to bend in a direction in which the interval t between the two arc surfaces CS in the terminal connection hole 16 increases or decreases. That is, both the contact pieces 12 can be displaced in a direction in which the front end portion 12B side approaches and separates from each other with the rear end portion 12A side as a fulcrum. The outer diameter of the round bar CR in the contact piece 12 is formed to be slightly smaller than the outer diameter of the round bar CR in the main body 11. In addition, outer peripheral ribs 12 </ b> C are provided around the outer peripheral side surfaces of both contact pieces 12 at positions corresponding to the terminal connection holes 16.

  The contact piece 12 is obtained by dividing the front portion of the main body 11 vertically by forming a pair of left and right slits SL in the front portion of the horizontal hole 18 in the round bar CR. Both slits SL are formed by notching backward from the front end portion of the round bar CR toward the front end portion of the horizontal hole 18 using a slot cutter or the like. Both slits SL are formed in a range from the guide hole 17 to the terminal connection hole 16 in the round bar CR. In the present embodiment, since most of the space separating the contact pieces 12 adjacent in the vertical direction is constituted by the horizontal holes 18, the slit SL is formed only in the front end portion of the round bar CR.

  The present embodiment is configured as described above. Next, a method for manufacturing the female terminal 10 will be described. First, as shown in FIG. 7, for example, a round bar material CR in which the main body portion 11, the flange portion 13, and the barrel portion 14 are formed is prepared in advance by cutting a rod material that is a base material. . When the accommodation space 15 is formed, as shown in FIG. 8, it is processed with a drill (not shown) so as to penetrate both sides of the round bar CR, and this drill is along the axis of the round bar CR. Then, the elongated hole 18 is formed by moving it in the front-rear direction (horizontal hole forming step).

  Thereafter, as shown in FIG. 12, a round hole CR is formed at the front end of the round bar CR and is opened to the front and side by communicating the guide hole 17 and the lateral hole 18. Is formed (guide hole forming step). Furthermore, by using a slot cutter or the like, slits SL are formed on both the left and right sides of the front end portion of the round bar CR in which the guide holes 17 are formed. As a result, the front portion of the main body 11 is divided and formed into a pair of upper and lower contact pieces 12 by the slits SL (slit forming step).

  Next, as shown in FIG. 9, the round bar CR in which the pair of upper and lower contact pieces 12 is formed is inserted into the cylindrical jig 70 from behind. In a state in which the flange portion 13 is in contact with the rear end opening edge of the jig 70, the front end of the round bar CR slightly protrudes forward from the front end opening edge of the jig 70, but the outer periphery of the contact piece 12. The rib 12C is set so as to remain inside the jig 70. In this way, the jig 70 set on the round bar CR side is attached and fixed to the processing apparatus, and processing by the drill DR is performed.

  Here, the gap formed between the outer peripheral rib 12 </ b> C and the inner peripheral surface of the jig 70 is a displacement amount that each contact piece 12 bends and displaces when the male terminal 80 is fitted into the terminal connection hole 16. It is set to be equal. On the other hand, the outer diameter of the drill DR is set to be equal to the outer diameter of the male terminal 80. Furthermore, the minimum inner diameter of the guide hole 17 before the terminal connection hole 16 is formed is set smaller than the outer diameter of the drill DR.

  For this reason, when the tapered drill DR is inserted into the guide hole 17, the diameter of the guide hole 17 is first expanded by the tip inclined surface of the drill DR, and the outer peripheral rib 12 </ b> C comes into contact with the inner peripheral surface of the jig 70. Thereby, it will be in the state by which the bending displacement of both the contact pieces 12 was controlled. The terminal connection hole 16 is formed by cutting the inner peripheral surface of the guide hole 17 with the drill DR in this state. Thus, the state in which the terminal connection hole 16 is formed by the drill DR reproduces the state in which the male terminal 80 is inserted into the terminal connection hole 16. For this reason, the inner diameter of the terminal connection hole 16 in which the male terminal 80 is inserted into the terminal connection hole 16 to be in a diameter-expanded state coincides with the outer diameter of the male terminal 80 (terminal connection hole forming step).

  Then, when the drill DR is pulled out from the terminal connection hole 16, both contact pieces 12 are elastically restored, and the outer peripheral rib 12C and the inner peripheral surface of the jig 70 are brought into a non-contact state. Accordingly, as shown in FIG. 13, the terminal connection hole 16 becomes a slightly flat elliptical hole when the pair of upper and lower contact pieces 12 approach each other. Thus, the female terminal 10 is manufactured only by cutting.

  Such a female terminal 10 is incorporated in, for example, a charging connector (not shown), and the male terminal 80 is incorporated in a vehicle-side connector that can be fitted to the charging connector. When the charging connector is fitted to the vehicle-side connector, the male terminal 80 is inserted into the terminal connection hole 16, and the terminal connection is made by bending and deforming the pair of upper and lower contact pieces 12 away from each other as shown in FIG. The hole 16 is in an expanded state. Thereby, both circular arc surfaces CS are arranged on the same circumference, and the contact portion can be brought into close contact with the outer peripheral surface of the male terminal 80 by the elastic return force of both contact pieces 12.

  As described above, in this embodiment, since the female terminal 10 is manufactured only by cutting, the processing accuracy of the contact portion can be increased. As a result, it becomes easy to manage the interval t between the two arc surfaces CS at the contact portion. In addition, since the terminal connection hole 16 is processed using the drill DR having the same diameter as the male terminal 80, the contact portion can be brought into contact with the entire outer peripheral surface of the male terminal 80. Further, since a gap is provided between the outer peripheral rib 12C and the jig 70, and the terminal connection hole 16 is formed in a state where the contact piece 12 is bent in the gap, the contact piece can be set by setting the size of the gap. Twelve displacement amounts can be managed.

  Since most of the accommodation space 15 of the male terminal 80 is constituted by the lateral hole 18, foreign matter that has entered the accommodation space 15 can be easily discharged from the lateral hole 18 to the outside. Moreover, since the upper and lower surfaces S constituting the horizontal hole 18 have a planar shape, the horizontal hole 18 can be processed by a drill. Moreover, since the horizontal hole 18 is configured to penetrate both sides of the round bar CR, the horizontal hole 18 can be processed at once by a drill. Moreover, since the horizontal hole 18 is formed in the shape of a long hole extending in the front-rear direction, the round bar CR can be divided into a plurality of contact pieces 12 by the horizontal hole 18 and the slit SL.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to the drawings of FIGS. In the second embodiment, the method for manufacturing the female terminal 10 in the first embodiment is partially changed, and the configuration, operation, and effect common to the first embodiment are duplicated, and thus the description thereof is omitted. Further, the same components as those in the first embodiment are denoted by the same reference numerals. In the first embodiment, the jig 70 set on the round bar CR side is attached and fixed to the processing apparatus and processed by the drill DR, whereas in the second embodiment, the jig 70 is previously set to the drill DR side. The tool 70 is attached and fixed, and the round rod material CR is inserted into the jig 70, and at the same time, machining with the drill DR is performed.

  As shown in FIG. 15, the jig 70 is arranged coaxially with the drill DR, and is arranged in such a manner that the tip E of the drill DR does not protrude from the opening edge 71 of the cylindrical jig 70. In other words, the distance from the opening edge 71 of the jig 70 to the tip E of the drill DR is such that the tip inclined surface of the drill DR contacts the inner peripheral surface of the guide hole 17 before the guide hole 17 expands in diameter. The rib 12C is accommodated in the jig 70, and the outer peripheral rib 12C is set to be in sliding contact with the inner peripheral surface of the jig 70 in a state where both the contact pieces 12 are bent by a predetermined amount.

  Therefore, the diameter of the guide hole 17 is restricted by inserting the round bar CR into the jig 70 to increase the diameter of the guide hole 17 and sliding the outer peripheral rib 12C on the inner peripheral surface of the jig 70. Is done. Subsequently, by inserting the round bar CR into the jig 70, as shown in FIG. 16, the inner peripheral surface of the guide hole 17 is cut by the drill DR, and the terminal connection hole 16 is formed. When the processing of the terminal connection hole 16 is finished, the female terminal 10 is manufactured by pulling out the round bar CR from the inside of the jig 70 and elastically returning both the contact pieces 12.

  According to such a manufacturing method, the trouble of inserting the round bar CR into the jig 70 and setting it on the processing apparatus side can be eliminated. Furthermore, since the jig 70 can be set in advance on the processing apparatus side, the jig 70 and the drill DR can be arranged coaxially in advance and fixed. For this reason, it is not necessary to position the jig 70 on the main body 11, and the jig 70 does not have to be fitted to the main body 11.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. 18 and 19. The female terminal 30 of the third embodiment is a partial modification of the configuration of the female terminal 10 in the first embodiment, and the configuration, operation, and effect common to those of the first embodiment are duplicated, and thus the description thereof is omitted. To do. In addition, for the configuration corresponding to the first embodiment, a reference numeral composed of a numerical portion obtained by adding 20 to the numerical portion of the reference numeral representing each configuration is attached. The female terminal 10 of the first embodiment is a so-called split terminal, whereas the female terminal 30 of the third embodiment is a so-called split terminal.

  In the present embodiment, as shown in FIG. 18, three contact pieces 32 are arranged at equiangular intervals (120 ° intervals) in the circumferential direction around the axis of the main body 31. For this reason, in the third embodiment, the three slits SL are formed radially about the axis of the main body 31. Correspondingly, each lateral hole 38 is formed in communication with the rear of each slit SL. For this reason, it is only necessary to form each slit SL only at the front end portion of the female terminal 30, and the time required to process the three slits SL can be shortened.

  In the present embodiment, as described above, the three horizontal holes 38 are provided corresponding to the three slits SL. As shown in FIG. 19, each of the surfaces S constituting these horizontal holes 38 is composed of two surfaces S, so that six surfaces S are arranged as a whole of the terminal accommodating portion 35. ing. In this way, when a foreign substance enters the inside of the terminal accommodating part 35, the foreign substance can be discharged to the outside of the terminal accommodating part 35 through the three lateral holes 38. Therefore, it becomes easier to discharge foreign matter to the outside than the female terminal 10 (the number of the lateral holes 18 is two) of the first embodiment.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to the drawing of FIG. The female terminal 40 according to the fourth embodiment is a partial modification of the configuration of the female terminal 10 according to the first embodiment, and the configuration, operation, and effect common to those of the first embodiment are duplicated, and thus the description thereof is omitted. To do. In addition, for the configuration corresponding to the first embodiment, a reference numeral composed of a numerical portion obtained by adding 30 to the numerical portion of the reference numeral representing each configuration is attached. The female terminal 40 of the fourth embodiment is a so-called quadrant terminal. That is, in the present embodiment, the four contact pieces 42 are arranged at equiangular intervals (90 ° intervals) in the circumferential direction around the axis of the main body 41.

  The female terminal 40 of this embodiment is provided by adding slits SL to both contact pieces 12 of the female terminal 10 of the first embodiment. That is, although the horizontal hole 48 is provided corresponding to both the slits SL arranged on the left and right sides, the horizontal hole corresponding to the both slits SL arranged on the upper and lower sides is not provided. In this way, it is only necessary to additionally form a pair of upper and lower slits SL in the slit forming step of the first embodiment, and the quadrant female terminal 40 is manufactured without significantly changing the manufacturing method of the first embodiment. can do.

<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 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) Although the jig 70 has a cylindrical shape in the above embodiment, according to the present invention, a pressing plate is arranged outside each contact piece, and the bending of each contact piece is regulated by this pressing plate. Also good.

  (3) Although the guide hole is formed in the front end portion of the round bar CR in the above embodiment and the terminal connection hole is formed in the guide hole, according to the present invention, the guide hole is formed in the front end of the round bar CR. The terminal connection hole may be formed directly without forming the.

  (4) Although the contact portion is in contact with the male terminal 80 on the entire surface in the above embodiment, according to the present invention, as shown in FIG. A part of the arc surface CS may be in contact with the male terminal 81.

  (5) Although the horizontal hole is formed in the shape of a long hole extending in the front-rear direction in the above embodiment, according to the present invention, the horizontal hole is formed as a circular hole, and the portion where the horizontal hole was to be formed You may provide a slit in places other than a circular hole.

DESCRIPTION OF SYMBOLS 10, 30, 40 ... Female terminal 11, 31, 41 ... Main-body part 12, 32, 42 ... Contact piece 15, 35, 45 ... Accommodating space 16, 36, 46 ... Terminal connection hole 17, 37, 47 ... Guide hole 18 , 38, 48 ... Horizontal hole 70 ... Jig 80, 81 ... Male terminal CR ... Round bar (bar)
CS ... Circular arc surface (contact part)
DR ... Drill S ... Each surface that constitutes the horizontal hole SL ... Slit

Claims (4)

A method of manufacturing a female terminal that is formed by cutting a bar extending in the front-rear direction, and is fitted inside with a plurality of contact pieces sandwiching the male terminal,
A horizontal hole forming step of providing a horizontal hole opening in a side portion of the bar;
A slit forming step of dividing the bar into the plurality of contact pieces by providing a plurality of slits arranged radially about the axis of the bar; and
A jig that is disposed opposite to the outer surface of the plurality of contact pieces with a gap is set, and the plurality of contact pieces are bent into the gap and contacted with the jig. A method of manufacturing a female terminal comprising: a terminal connection hole forming step of forming a contact portion with respect to the male terminal by providing a terminal connection hole communicating with the lateral hole from a front end portion.   The method for manufacturing a female terminal according to claim 1, wherein the terminal connection hole is provided using a drill having the same diameter as the outer diameter of the male terminal.   The displacement amount by which the plurality of contact pieces bend and displace in the gap corresponds to a displacement amount by which the plurality of contact pieces bend and displace when the male terminal is elastically sandwiched. The manufacturing method of the female terminal of Claim 1 or Claim 2.   Before the slit forming step, a guide hole forming step of forming a guide hole in the front end portion of the bar is provided, and the terminal connecting hole is provided in the terminal connecting hole forming step. The manufacturing method of the female terminal as described in any one of Claim 1 thru | or 3.

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