JP4805729B2 - Fixing method between terminal fittings and terminal fittings - Google Patents

Description

  The present invention relates to a method for fixing terminal fittings constituting a wire harness routed in an automobile or the like and a terminal fitting.

  A wide variety of electronic devices are mounted on a vehicle as a moving body. The automobile arranges a wire harness in order to transmit electric power, a control signal, and the like to the electronic device. The wire harness includes a plurality of electric wires and a connector. The electric wire is a so-called covered electric wire including a conductive core wire and an insulating covering portion that covers the core wire.

  The connector described above includes a terminal fitting and a connector housing. The terminal fitting is made of a conductive sheet metal or the like. The connector housing is made of an insulating synthetic resin and is formed in a cylindrical shape. The connector housing accommodates the terminal fitting.

  As the connector described above, for example, a connector that is fitted to a mating connector while being attached to a printed wiring board is used. The terminal fitting of this type of connector has a rod-shaped first electrical contact portion that is electrically connected to the wiring pattern of the printed wiring board, and a cylindrical second electrical connection that is connected to the terminal fitting of the mating connector described above. And a contact portion.

  The terminal fitting including the rod-shaped first electrical contact portion and the cylindrical second electrical contact portion described above is energized because the cross-sectional areas of the first electrical contact portion and the second electrical contact portion are different. At this time, the first electrical contact portion described above generates heat locally.

  In order to prevent the heat generation described above, it can be considered that the first electrical contact portion is bent to increase the cross-sectional area of the first electrical contact portion. However, there is a possibility that the metal mold for bending the first electrical contact portion becomes complicated, and the cost of the terminal fitting itself increases.

  Further, the terminal fitting described above is composed of a first terminal fitting having the first electric contact portion and a second terminal fitting having the second electric contact portion which are separate from each other, and the first terminal fitting. It is conceivable to make the thickness of the second metal fitting thicker than the second terminal fitting. By doing so, it is conceivable to prevent the first electrical contact portion, that is, the first terminal fitting from generating heat.

  In this case, in order to fix the first terminal fitting and the second terminal fitting to each other, it is conceivable to provide a spring piece on one of the first terminal fitting and the second terminal fitting. In this case, the configuration of one of the first terminal fitting and the second terminal fitting provided with a spring piece becomes complicated, the mold for bending one of them becomes complicated, and the cost of the terminal fitting itself is reduced. There was a risk of soaring.

  Further, in order to fix the first terminal fitting and the second terminal fitting to each other, it is conceivable to provide a rivet or the like separate from the first terminal fitting and the second terminal fitting. In this case, the number of parts tends to increase, and the cost of the terminal fitting itself may increase.

  Accordingly, an object of the present invention is to provide a low-cost method for fixing terminal fittings and a terminal fitting that can prevent local heat generation.

In order to achieve the above-described problems and achieve the object, the terminal fitting fixing method according to the first aspect of the present invention is erected from both edges in the width direction of the first flat plate portion and the first flat plate portion. A fixing method of a first terminal fitting having a crimping piece and a second terminal fitting having a second flat plate portion having a thickness larger than that of the first flat plate portion, provided on the first flat plate portion. After inserting the protruding portion protruding from the second flat plate portion into the through hole, the distal end portion of the protruding portion is crushed toward the second flat plate portion to form an enlarged portion, and the enlarged portion and the with Komu viewed interposed said first flat plate portion between the second flat plate portion, sandwiching the second flat plate portion between the bending toward the crimping pieces in the first flat plate portion and the first flat plate portion It is characterized by.

The terminal fitting of the present invention according to claim 2 is a first terminal fitting having a caulking piece erected from both edges of the first flat plate portion and the width direction of the first flat plate portion, and a thickness of the first flat plate portion. A second terminal fitting having a second flat plate portion thicker than the thickness of the first flat plate portion, and a terminal in which the first metal plate portion and the second flat plate portion are overlapped with each other. In the metal fitting, a through hole is provided in the first flat plate portion, a protruding portion protruding from the second flat plate portion is provided in the second flat plate portion, and a tip of the protruding portion inserted into the through hole. in part, the second enlarged portion formed crushed toward the flat plate portion is formed, write sandwiching the first flat plate portion between the second flat plate portion and the enlarged portion Mutotomoni, the caulking A piece is bent toward the first flat plate portion, and the second flat plate portion is between the first flat plate portion and the first flat plate portion. It is characterized in that sandwich.

  A terminal fitting according to a third aspect of the present invention is the terminal fitting according to the second aspect, wherein a plurality of the through holes and the protrusions are provided.

  According to a fourth aspect of the present invention, there is provided the terminal fitting according to the second or third aspect, wherein the inner surface of the through hole is formed from the second flat plate portion superimposed on the first flat plate portion. A taper surface that is inclined in a direction in which the through hole gradually expands as it leaves is provided.

  The terminal fitting of the present invention according to claim 5 is the terminal fitting according to claim 4, wherein the inner surface of the through hole is connected to the tapered surface and is closer to the second flat plate portion than the tapered surface. In addition, a parallel surface facing the outer peripheral surface of the projecting portion before formation of the enlarged portion with a space therebetween is further provided.

  The terminal fitting of the present invention according to claim 6 is the terminal fitting according to claim 4 or 5, wherein the enlarged portion closely overlaps the tapered surface and is accommodated in the through hole. It is characterized by.

  A terminal fitting according to a seventh aspect of the present invention is the terminal fitting according to any one of the first to sixth aspects, wherein the second flat plate portion of the protruding portion before the enlarged portion is formed. And the center of the end surface of the tip end portion of the protruding portion is crushed toward the second flat plate portion and is recessed from the end surface together with the enlarged portion. It is characterized by being formed.

  According to the fixing method of the terminal metal fittings of the present invention described in claim 1, the first flat plate portion and the first flat plate portion are provided with a simple configuration in which a through hole is provided in the first flat plate portion and a protruding portion is provided in the second flat plate portion. The two flat plate portions can be fixed, that is, the first terminal fitting and the second terminal fitting can be fixed.

  According to the terminal fitting of the present invention described in claim 2, the first flat plate portion and the second flat plate portion are provided with a simple configuration in which a through hole is provided in the first flat plate portion and a protruding portion is provided in the second flat plate portion. In other words, the first terminal fitting and the second terminal fitting can be fixed.

  According to the terminal fitting of the present invention described in claim 3, since the plurality of through holes and protrusions are provided, when the first terminal fitting and the second terminal fitting are fixed, these terminal fittings are rattled. Can be prevented.

  According to the terminal fitting of the present invention described in claim 4, since the tapered surface is provided on the inner surface of the through hole, the distal end portion of the projecting portion is reliably positioned in the through hole, so that the distal end portion is crushed. The enlarged portion thus formed expands in the outer peripheral direction within the through hole.

  According to the terminal fitting of the present invention described in claim 5, since the inner surface of the through hole is provided with a parallel surface that is continuous with the tapered surface and is spaced from the outer peripheral surface of the protruding portion before the enlarged portion is formed, The protrusion can be easily inserted into the hole.

  According to the terminal metal fitting of the present invention described in claim 6, since the enlarged portion closely overlaps the tapered surface, the enlarged flat portion can be securely sandwiched between the enlarged flat portion and the second flat plate portion.

  Moreover, since the enlarged part is stored in the through hole, the enlarged part can be prevented from coming into contact with other articles.

  According to the terminal metal fitting of the present invention described in claim 7, since the center of the tip portion of the protruding portion before formation of the enlarged portion is pressed to form a recess in the tip surface together with the enlarged portion, the enlarged portion and the tapered surface And adhere more securely.

  As described above, the present invention according to claim 1 can fix the first terminal fitting and the second terminal fitting with a simple configuration, so that the first terminal fitting and the second terminal fitting are separated, Even if these thicknesses are varied to prevent heat generation, the cost can be reduced.

  According to the second aspect of the present invention, since the first terminal fitting and the second terminal fitting can be fixed with a simple configuration, the first terminal fitting and the second terminal fitting are separated and their thicknesses are made different. Thus, even if heat generation can be prevented, cost reduction can be achieved.

  According to the third aspect of the present invention, since the first terminal fitting and the second terminal fitting fixed to each other can be prevented from rattling, it is possible to prevent these terminal fittings from being bent and assembled.

  According to the fourth aspect of the present invention, since the enlarged portion formed by crushing the tip portion of the projecting portion expands in the outer peripheral direction in the through hole, the first flat plate portion is between the enlarged portion and the second flat plate portion. Can be pinched securely. Therefore, the first terminal fitting and the second terminal fitting can be securely fixed firmly, and the terminal fittings can be prevented from being unexpectedly separated from each other.

  According to the fifth aspect of the present invention, since the protruding portion can be easily inserted into the through hole, the terminal fittings can be easily fixed to each other and can be easily assembled.

  In the present invention described in claim 6, since the enlarged portion can securely sandwich the first flat plate portion with the second flat plate portion, the first terminal metal fitting and the second terminal metal fitting can be more securely strengthened. It can fix, and it can prevent reliably that these terminal metal fittings isolate | separate unexpectedly.

  Moreover, since it can prevent that an enlarged part contacts other articles | goods, it can prevent electrically short-circuiting.

  According to the seventh aspect of the present invention, since the center of the tip portion of the protruding portion before the enlarged portion is formed is pressed to form a dent on the tip surface together with the enlarged portion, the enlarged portion and the taper surface are more closely adhered to each other. To do. For this reason, the electrical resistance between the terminal fittings mutually fixed can be suppressed. Further, the first flat plate portion can be sandwiched more firmly between the enlarged portion and the second flat plate portion, and the terminal fittings can be more firmly fixed.

  A terminal fitting according to a first embodiment of the present invention will be described with reference to FIGS. A terminal fitting 1 shown in FIG. 1 and the like constitutes a connector (not shown).

  The connector includes a connector housing made of an insulating synthetic resin and the terminal fitting 1 described above. The connector housing is formed in a box shape and is provided with a large number of terminal accommodating chambers for accommodating the terminal fittings 1. The connector housing is attached to the printed wiring board and engages with the connector housing of the mating connector.

  As shown in FIGS. 1 and 2, the terminal fitting 1 includes a first terminal fitting 5 and a second terminal fitting 6.

  The 1st terminal metal fitting 5 is comprised with the electroconductive sheet metal, and as shown in FIG. 3, the 1st electric contact part 7, the 1st flat plate part 8, and a pair of crimping piece 9 are integrally provided. . The first electrical contact portion 7 includes a cylindrical portion 10 formed in a square cylindrical shape and a spring piece 11 provided in the cylindrical portion 10. The male tab of the terminal fitting of the mating connector described above enters the cylindrical portion 10, that is, the first electrical contact portion 7. The spring piece 11 presses the male tab that has entered the cylindrical portion 10 against the inner surface of the cylindrical portion 10. The 1st electric contact part 7 is electrically connected with the terminal metal fitting of the other party connector mentioned above.

  The first flat plate portion 8 is formed in a flat plate shape, and is continuous with one outer wall of the cylindrical portion 10 of the first electric contact portion 7. The caulking pieces 9 are erected from both edges in the width direction of the first flat plate portion 8. The caulking piece 9 is bent toward the first flat plate portion 8 and sandwiches a second flat plate portion 14 described later between the first flat plate portion 8. The caulking piece 9 crimps the second flat plate portion 14 of the second terminal fitting 6 between the first flat plate portion 8.

  The first flat plate portion 8 is provided with one through hole 12. Needless to say, the through-hole 12 penetrates the first flat plate portion 8, and the planar shape is formed in a round shape. As shown in FIG. 5, the inner diameter of the through hole 12 gradually increases on the inner peripheral surface (inner surface) of the through hole 12 as the distance from the second flat plate portion 14 superimposed on the first flat plate portion 8 increases. A tapered surface 12a inclined in the direction is provided. The tapered surface 12 a is provided on the entire circumference of the inner peripheral surface of the through hole 12.

  The 2nd terminal metal fitting 6 is comprised with the electroconductive sheet metal, and is equipped with the 2nd electrical contact part 13, the 2nd flat plate part 14, and the protrusion part 15 integrally, as shown in FIG. The second electrical contact portion 13 includes a pair of terminals 16 formed in a rod shape. The terminals 16 are arranged in parallel to each other. The pair of terminals 16 are passed through through holes provided in the printed wiring board and fixed by brazing using a wiring pattern of the printed wiring board and solder or the like. The pair of terminals 16, that is, the second electrical contact portion 13 is electrically and mechanically connected to the wiring pattern of the printed wiring board.

  The second flat plate portion 14 is formed in a flat plate shape and extends from the pair of terminals 16 of the second electric contact portion 13 from one end in the longitudinal direction thereof. Both surfaces of the second flat plate portion 14 are parallel to the longitudinal direction of the pair of terminals 16. The second flat plate portion 14 is overlaid on the first flat plate portion 8.

  The protruding portion 15 protrudes in a protruding manner from the surface of the second flat plate portion 14 superimposed on the first flat plate portion 8. The protrusion 15 is formed in a columnar shape having an outer diameter substantially equal to the inner diameter on the small diameter side of the through-hole 12, and then the distal end portion on the side away from the second flat plate portion 14 is crushed toward the second flat plate portion 14. The enlarged portion 18 is formed. The enlarged portion 18 protrudes in the outer peripheral direction of the protruding portion 15. The enlarged portion 18 is in close contact with the tapered surface 12 a and sandwiches the first flat plate portion 8 with the second flat plate portion 14.

  Further, the protruding amount D (shown in FIG. 4) of the protruding portion 15 from the second flat plate portion 14 before the enlarged portion 18 is formed is the same as that of the first flat plate portion 8 of the first terminal fitting 5 described above. It is larger than the thickness T1 (shown in FIG. 5). Further, the protrusion amount D described above is a value that allows the expansion portion 18, that is, the protrusion portion 15 to be accommodated in the through hole 12 when the above-described expansion portion 18 is formed. The protrusion 15 described above is formed by punching a part of the second flat plate portion 14 into a cylindrical shape.

  The thickness T2 (shown in FIG. 4) of the second flat plate portion 14 of the second terminal fitting 6 (the metal plate constituting the second metal plate 6) is thicker than the thickness T1 of the first flat plate portion 8 of the first terminal metal fitting 5 (the metal plate constituting the second metal plate 6). . That is, the thickness T2 of the second flat plate portion 14 of the second terminal metal fitting 6 (the metal plate constituting the second metal plate) and the thickness T1 of the first flat plate portion 8 of the first terminal metal fitting 5 (the metal plate constituting the second metal plate) are different from each other. Yes. Thus, by making the thickness T2 thicker than the thickness T1, it is possible to prevent the terminal 16 and the like from generating heat due to the energized current. That is, local heat generation of the terminal fitting 1 is prevented by making the thickness T2 thicker than the thickness T1.

  The terminal fitting 1 mentioned above is assembled as follows. First, as shown in FIG. 5, the through hole 12 is formed in the first flat plate portion 8 of the first terminal fitting 5, and the caulking piece 9 is erected from the edge in the width direction of the first flat plate portion 8. Further, as shown in FIG. 4, a cylindrical protrusion 15 is formed on the second flat plate portion 14 of the second terminal fitting 6.

  And as shown in FIG. 6, the protrusion part 15 is inserted in the through-hole 12, and the 1st flat plate part 8 and the 2nd flat plate part 14 are piled up mutually. At this time, the first flat plate portion 8 and the second flat plate portion 14 are positioned so that the inner diameter of the through hole 12 gradually increases as the distance from the second flat plate portion 14 increases.

  Thereafter, as shown in FIG. 7, the caulking piece 9 is bent toward the first flat plate portion 8, and the second flat plate portion 14 is sandwiched (clamped) between the caulking piece 9 and the first flat plate portion 8. The tip of the protruding portion 15 on the side away from the second flat plate portion 14 (projected from the inside of the through hole 12) is crushed toward the second flat plate portion 14 to form the enlarged portion 18. Then, the enlarged portion 18 sandwiches the first flat plate portion 8 with the second flat plate portion 14.

  Thus, the first terminal fitting 5 and the second terminal fitting 6 are fixed to each other, and the terminal fitting 1 having the above-described configuration is assembled. The terminal fitting 1 assembled in this way is accommodated in the terminal accommodating chamber 4 of the connector housing 3, the terminal 16 of the second electrical contact portion 13 is connected to the wiring pattern of the printed wiring board, and the first electrical contact portion. 7 connects with the terminal fitting of the mating connector.

  According to this embodiment, the 1st flat plate part 8 and the 2nd flat plate part 14 are fixed by the simple structure of providing the through-hole 12 in the 1st flat plate part 8, and providing the protrusion part 15 in the 2nd flat plate part 14. FIG. That is, the first terminal fitting 5 and the second terminal fitting 6 can be fixed. Therefore, the cost of the terminal fitting 1 can be reduced even if the first terminal fitting 5 and the second terminal fitting 6 are separated and the thicknesses T1 and T2 are made different to prevent heat generation. Can do.

  Since the tapered surface 12 a is provided on the inner peripheral surface of the through hole 12, the enlarged portion 18 formed by crushing the distal end portion of the projecting portion 15 expands in the outer peripheral direction in the through hole 12. For this reason, the 1st flat plate part 8 can be pinched | interposed reliably between the enlarged part 18 and the 2nd flat plate part 14. FIG. Therefore, the 1st terminal metal fitting 5 and the 2nd terminal metal fitting 6 can be fixed firmly firmly, and it can prevent that these terminal metal fittings 5 and 6 isolate | separate unexpectedly.

  Since the enlarged portion 18 closely overlaps the tapered surface 12 a, the first flat plate portion 8 can be reliably sandwiched between the enlarged portion 18 and the second flat plate portion 14. Therefore, the 1st terminal metal fitting 5 and the 2nd terminal metal fitting 6 can be fixed firmly more reliably, and it can prevent reliably that these terminal metal fittings 5 and 6 isolate | separate unexpectedly.

  Moreover, since the enlarged part 18 is accommodated in the through-hole 12, it can prevent that this enlarged part 18 contacts other articles | goods. Therefore, it is possible to prevent the terminal fitting 1 from being electrically short-circuited.

  Since the caulking piece 9 is sandwiched between the first flat plate portion 8 and the second flat plate portion 14, the first flat plate portion 8 and the second flat plate portion 14, that is, the first terminal fitting 5 and the second terminal fitting 6 are connected. Can be fixed securely.

  Since the caulking pieces 9 are provided at both edges in the width direction of the first flat plate portion 8, the first flat plate portion 8 and the second flat plate portion 14, that is, the first terminal fitting 5 and the second terminal fitting 6 are more securely fixed. it can.

  Next, the terminal metal fitting concerning the 2nd Embodiment of this invention is demonstrated based on FIG. 8 thru | or FIG. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 8 to 10, the terminal fitting 1 of the present embodiment is provided with a plurality of through holes 12 and a plurality of protrusions 15. In the illustrated example, two through holes 12 and two protrusions 15 are provided. The through holes 12 are arranged at intervals from each other along the longitudinal direction of the first flat plate portion 8 of the first terminal fitting 5. The protrusions 15 are arranged at intervals from each other along the longitudinal direction of the second flat plate part 14 of the second terminal fitting 6. In addition, the structure of these through-holes 12 and the protrusion parts 15 is equal to 1st Embodiment mentioned above.

  According to the present embodiment, in addition to the effects of the first embodiment described above, a plurality of through holes 12 and protrusions 15 are provided, so that when the first terminal fitting 5 and the second terminal fitting 6 are fixed, The terminal fittings 5 and 6 can be reliably prevented from rattling, and the terminal fittings 5 and 6 can be reliably prevented from being separated unexpectedly.

  In the first and second embodiments described above, the inner diameter on the small diameter side of the through hole 12 is made equal to the outer diameter of the protruding portion 15 before the enlarged portion 18 is formed. However, in the present invention, the inner diameter on the small diameter side of the through hole 12 may be larger than the outer diameter of the protrusion 15 before the enlarged portion 18 is formed.

  For example, in the terminal fitting 1 according to the third embodiment of the present invention described next with reference to FIGS. 11 to 14, the inner diameter of the through hole 12 is set to the outside of the protruding portion 15 before the enlarged portion 18 is formed. It is larger than the diameter. In the third embodiment, the same parts as those in the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in FIGS. 11 to 14, a parallel surface 12 b is provided on the inner peripheral surface (inner surface) of the through-hole 12 in addition to the tapered surface 12 a described above. The parallel surface 12b extends along a direction orthogonal to both surfaces of the second flat plate portion 14. The parallel surface 12b is continuous (continuously) with the tapered surface 12a and is disposed closer to the second flat plate portion 14 that is superimposed on the first flat plate portion 8 than the tapered surface 12a. Furthermore, the parallel surface 12b is opposed to the outer peripheral surface of the protruding portion 15 before the formation of the enlarged portion 18 that has entered the through hole 12 with a gap.

  According to the present embodiment, in addition to the effects of the first embodiment described above, the gap between the inner peripheral surface of the through-hole 12 and the outer peripheral surface of the protruding portion 15 that is continuous with the tapered surface 12a and before the enlarged portion 18 is formed. Since the open parallel surface 12b is provided and the inner diameter of the through hole 12 is larger than the outer diameter of the protrusion 15, the protrusion 15 can be easily inserted into the through hole 12. Therefore, since the protrusion part 15 can be easily inserted in the through-hole 12, the terminal metal fittings 5 and 6 can be fixed easily, and the terminal metal fitting 1 can be assembled easily.

  Also in this embodiment, similarly to the second embodiment described above, a plurality of through-holes 12 and protrusions 15 may be provided. In this case, it is desirable to arrange the through holes 12 and the protruding portions 15 along the longitudinal direction of the flat plate portions 8 and 14, respectively.

  Next, the terminal metal fitting concerning the 4th Embodiment of this invention is demonstrated based on FIG. 15 thru | or FIG. The same parts as those in the first to third embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as in the third embodiment described above, the tapered surface 12a and the parallel surface 12b described above are provided on the inner peripheral surface of the through hole 12, and as shown in FIGS. The inner diameter of the hole 12 is formed larger than the outer diameter of the protruding portion 15 before the enlarged portion 18 is formed. In the present embodiment, the protruding amount D (shown in FIG. 16) of the protruding portion 15 from the second flat plate portion 14 and the thickness T1 (shown in FIG. 17) of the first flat plate portion 8 are formed to be equal.

  Further, in the present embodiment, as shown in FIG. 18, after inserting the protruding portion 15 before forming the enlarged portion 18 into the through hole 12, as shown in FIG. 19, the end face 15a of the distal end portion of the protruding portion 15 is inserted. A bar-shaped pressing jig 19 is brought into contact with the center of the plate. Then, as shown in FIG. 20, the pressing jig 19 is pressed toward the second flat plate portion 14, and the center of the end surface 15 a of the tip end portion of the projecting portion 15 is made to the second flat plate portion 14 by the pressing jig 19. The second flat plate portion 14 is crimped by the caulking piece 9 while being crushed toward the concave portion 20 from the end face 15 a together with the enlarged portion 18 described above. Thus, as shown in FIG. 21, the terminal fittings 5 and 6 are fixed to each other, and the terminal fitting 1 is assembled.

  According to the present embodiment, in addition to the effects of the first embodiment described above, the center of the end surface 15a of the distal end portion of the projecting portion 15 before the enlarged portion 18 is formed is pressed together with the enlarged portion 18 to the distal end surface 15a. Therefore, the enlarged portion 18 and the taper surface 12a are more closely adhered to each other. For this reason, the electrical resistance between the terminal fittings 5 and 6 fixed to each other can be suppressed. Moreover, the 1st flat plate part 8 can be pinched | interposed more firmly between the enlarged part 18 and the 2nd flat plate part 14, and terminal metal fittings 5 and 6 can be fixed more firmly.

  Also in this embodiment, similarly to the second and third embodiments described above, a plurality of through holes 12 and protrusions 15 may be provided. In this case, it is desirable to arrange the through holes 12 and the protruding portions 15 along the longitudinal direction of the flat plate portions 8 and 14, respectively.

  In the present embodiment, the protruding amount D and the thickness T1 are made equal. However, in the present invention, the protrusion amount D may be larger than the thickness T1, and the protrusion amount D may be slightly larger than the thickness T1 or slightly smaller. Also in this embodiment, the inner diameter of the through hole 12 and the outer diameter of the protruding portion 15 may be made equal.

  In the present invention, the projection amount D and the thickness T1 are equalized, and the difference between the projection amount D and the thickness T1 is sufficiently smaller than the projection amount D and the thickness T1. Is said to be approximately equal. Thus, in this invention, you may make the protrusion amount D and thickness T1 substantially equal.

  In the present invention, the tapered surface 12 a may not be formed on the inner peripheral surface of the through hole 12. Further, only one caulking piece 9 may be provided. In short, in the present invention, at least one caulking piece 9 may be provided, and the caulking piece 9 may be erected from the edge in the width direction of the first flat plate portion 8 (may be provided).

  Further, the tapered surface 12a may be provided on a part of the inner peripheral surface without being provided on the entire inner peripheral surface of the through hole 12. Further, three or more through holes 12 and protrusions 15 may be provided. Furthermore, it is desirable to provide the through hole 12 in a thin terminal fitting and provide the protrusion 15 in a thick terminal fitting.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view of the terminal metal fitting concerning a 1st embodiment of the present invention. It is a perspective view which shows the cross section of the III-III line in FIG. It is a perspective view which decomposes | disassembles and shows the terminal metal fitting shown by FIG. It is sectional drawing which follows the VV line in FIG. It is sectional drawing which follows the VI-VI line in FIG. It is sectional drawing which shows the state which inserted the protrusion part of the 2nd terminal metal fitting in the through-hole of the 1st terminal metal fitting shown by FIG. It is sectional drawing which shows the state which bent the crimping piece of the 1st terminal metal fitting shown by FIG. 6, and crushed the front-end | tip part of the protrusion part of a 2nd terminal metal fitting. It is a perspective view which shows the terminal metal fitting concerning the 2nd Embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the terminal metal fitting shown by FIG. It is sectional drawing which follows the XI-XI line in FIG. It is a perspective view which shows the cross section of the terminal metal fitting concerning the 3rd Embodiment of this invention. It is sectional drawing of the 1st terminal metal fitting of the terminal metal fitting shown by FIG. It is sectional drawing which shows the state which inserted the protrusion part before formation of the expansion part of the terminal metal fitting shown by FIG. 11 in the through-hole. It is sectional drawing which shows the state which bent the crimping piece shown by FIG. 12, and crushed the front-end | tip part of the protrusion part. It is a perspective view which shows the cross section of the terminal metal fitting concerning the 4th Embodiment of this invention. It is sectional drawing of the 2nd terminal metal fitting of the terminal metal fitting shown by FIG. It is sectional drawing of the 1st terminal metal fitting of the terminal metal fitting shown by FIG. It is sectional drawing which shows the state which inserted the protrusion part before formation of the enlarged part of the terminal metal fitting shown by FIG. 15 in the through-hole. It is sectional drawing which shows the state which made the pressing jig contact the end surface of the front-end | tip part of the protrusion part of the terminal metal fitting shown by FIG. It is sectional drawing which shows the state which bent the crimping piece with the press jig | tool shown by FIG. 19, and crushed the front-end | tip part of the protrusion part. It is sectional drawing of the terminal metal fitting shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal metal fitting 5 1st terminal metal fitting 6 2nd terminal metal fitting 8 1st flat plate part 9 Caulking piece 12 Through-hole 12a Tapered surface 12b Parallel surface 14 2nd flat plate part 15 Protrusion part 15a End surface 18 Enlarged part 20 Depression D Protrusion amount T1 1st Thickness of 1 flat plate part T2 Thickness of 2nd flat plate part

Claims (7)

A first terminal fitting having a caulking piece standing from both edges in the width direction of the first flat plate portion and the first flat plate portion; and a second flat plate portion having a thickness larger than the thickness of the first flat plate portion . A fixing method with the second terminal fitting,
After inserting a protruding portion protruding from the second flat plate portion into the through hole provided in the first flat plate portion, the tip of the protruding portion is crushed toward the second flat plate portion to expand the enlarged portion. formed, the first flat plate portion with Komu viewed interposed into between the between the enlarged portion and the second flat plate portion,
A method of fixing terminal fittings, wherein the caulking piece is bent toward the first flat plate portion and the second flat plate portion is sandwiched between the first flat plate portion . A first terminal fitting having a caulking piece standing from both edges in the width direction of the first flat plate portion and the first flat plate portion; and a second flat plate portion having a thickness larger than the thickness of the first flat plate portion . In a terminal fitting provided with a second terminal fitting, wherein the terminal plate is fixed in a state where the first flat plate portion and the second flat plate portion are overlapped with each other,
A through hole is provided in the first flat plate portion, and a protruding portion protruding from the second flat plate portion is provided in the second flat plate portion, and
An enlarged portion formed by being crushed toward the second flat plate portion is formed at the tip of the protruding portion inserted into the through hole,
The enlarged portion and sandwiching said first flat plate portion between the second flat plate portion Included Mutotomoni,
The terminal fitting, wherein the caulking piece is bent toward the first flat plate portion to sandwich the second flat plate portion with the first flat plate portion .   The terminal fitting according to claim 2, wherein a plurality of the through holes and the protrusions are provided.   The inner surface of the through hole is provided with a tapered surface inclined in a direction in which the through hole gradually expands as the distance from the second flat plate portion overlapped with the first flat plate portion increases. The terminal metal fitting of Claim 2 or Claim 3 to do.   The inner surface of the through hole is connected to the tapered surface and is disposed closer to the second flat plate portion than the tapered surface, and is spaced from the outer peripheral surface of the protruding portion before the enlarged portion is formed. 5. The terminal fitting according to claim 4, further comprising a parallel surface.   The terminal fitting according to claim 4 or 5, wherein the enlarged portion closely overlaps the tapered surface and is accommodated in the through hole. The amount of protrusion from the second flat plate portion before the formation of the enlarged portion is substantially equal to the thickness of the first flat plate portion,
It claims 2 to wherein the center of the end face of the tip portion of the protrusion concave recess is formed from the end surface with the enlarged portion is crushed toward the second flat plate portion 6. The terminal fitting according to claim 1.

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