JP6316258B2 - Electric wire with terminal, wire harness - Google Patents

Description

  The present invention relates to an electric wire with a terminal used for an automobile or the like.

  Conventionally, in fields such as automobiles, OA equipment, and home appliances, electric wires made of copper-based materials having excellent electrical conductivity have been used as power lines and signal lines. In particular, in the automobile field, the performance and functionality of vehicles are rapidly increasing, and various electric devices and control devices mounted on the vehicle are increasing. Therefore, the electric wire with a terminal used in this tends to increase.

  On the other hand, while environmental problems are attracting attention, the weight reduction of automobiles is required. Therefore, an increase in weight accompanying an increase in the amount of wire harness used becomes a problem. For this reason, it replaces with the copper wire currently used conventionally and the lightweight aluminum electric wire attracts attention.

  Here, a connection terminal is used when connecting such electric wires or in a connection portion such as a device. However, even if it is an electric wire with a terminal using an aluminum electric wire, copper which is excellent in an electrical property may be used for a terminal part for reliability of a connection part. In such a case, an aluminum electric wire and a copper terminal are joined and used.

  However, when different metals are brought into contact, so-called electrolytic corrosion may occur due to the difference in standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion on the aluminum side, which is electrically base, progresses due to the influence of water scattering and condensation on the contact portion. For this reason, the connection state between the electric wire and the terminal at the connection portion becomes unstable, and there is a risk that the electrical resistance increases due to an increase in contact resistance or a decrease in wire diameter, and further, the disconnection may occur, resulting in malfunction of the electrical component or stop of the function. is there.

  As such a connection structure of the crimp terminal to the electric wire, for example, there is a connection structure in which a waterproof sheet is provided before and after the conductor crimp part, and the leading end side of the conductor crimp part is closed with the waterproof sheet (Patent Document). 1).

Japanese Patent Laying-Open No. 2015-65148

  By disposing a water-stop sheet at the tip of the conductor crimping portion as in Patent Document 1, the joint portion between the electric wire conductor and the terminal is sealed, and entry of water or the like into the connection portion can be prevented.

  On the other hand, if the tip end side of the conductor crimping part is compressed too much, a so-called bend-up may occur where the crimping part and the terminal body are bent. In the worst case, the terminal body and the crimping part are broken. There is a fear. Further, by forming the strong pressure bonding portion at the tip of the conductor pressure bonding portion, a so-called trumpet shape is formed such that the end of the pressure bonding portion opens, and as a result, the water stoppage may be lowered. Moreover, when a water-stop sheet is compressed too strongly, the water-stop sheet is likely to deteriorate over time due to compression strain, and durability may be reduced.

  This invention is made | formed in view of such a problem, and it aims at providing the electric wire with a terminal etc. which can obtain more reliably the water stop in the front end side of a conductor crimping | compression-bonding part.

In order to achieve the above-described object, the first invention is a terminal-attached electric wire in which a terminal and a coated conductor are connected, and the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body. The crimping part includes a crimping part for crimping the sheathing part of the sheathed conductor, a conductor crimping part for crimping the conductor exposed from the sheathing part, and a sealing part closer to the terminal body than the conductor crimping part. Are formed integrally, and the crimping part is an overlap type in which ends of opposing barrels overlap each other at the time of crimping , and resin is disposed on at least a part of the inner surface of the crimping part, The terminal- attached electric wire is characterized in that the compression height of the sealing portion is higher than the compression height of the lead wire crimping portion, where the height of the inner surface of the crimping portion at the center in the terminal width direction is the compression height.

  As for the compression height of the said sealing part, it is desirable that it is lower than the compression height of the said coating pressure bonding part.

  The sealing portion may be provided with a pushing portion that protrudes toward the inner surface, and a compression height at a tip of the pushing portion may be higher than a compression height of the conductor crimping portion.

  The push-in portions may be formed above and below the sealing portion, and the upper and lower push-in portions may have a compression height at the tips that is higher than the compression height of the conductor crimping portion.

Before a part of the end portion in the width direction of the Kifutome portion notch is provided such that said notch on the inside, the crimp portions are compressed rounded, the notch The compression height at may be higher than the compression height of the conductor crimping portion.

  The resin provided in the sealing portion may be thicker than the resin provided in another part.

  The conductive wire crimping portion may be provided with serrations, and the resin may be disposed so as to overlap a part of the serrations.

At least a portion may be notched in the resin of the portion which becomes the inside of the front Symbol crimping portion.

Width before Symbol conductor crimping portion is wider than the width of the insulation crimp portion, the end portion of the conductor crimping portion of the on the outside side is, in the widthwise direction than an end portion of the insulation crimp portion on the outside side It may protrude.

Before Symbol crimping portion, the wire crimping portion and the sealing portion, of them overlap end portions of the barrel facing each other, said insulation crimp portion is ends of the barrel opposite is butted to each other Also good.

  The terminal may be made of copper or a copper alloy, and the conductor of the coated conductor may be made of aluminum or an aluminum alloy.

  According to the first invention, since the resin compressibility of the sealing portion at the tip of the conductor crimping portion is low, the end portion does not open in a so-called bend-up or trumpet shape. Moreover, since the compressibility is not too high, it is possible to suppress deterioration of the resin over time due to compressive stress.

  Moreover, resin of a sealing part can be compressed with a suitable compression rate by making the compression height of a sealing part lower than the compression height of a coating | compression-bonding crimping | compression-bonding part.

  Moreover, when the pushing part which protrudes in the inner surface side of a sealing part is provided, the effect mentioned above can be acquired reliably by making the compression height in the front-end | tip of a pushing part higher than the compression height of a conducting wire crimping part. Can do.

  In addition, when the push-in part is formed above and below the sealing part, the above-described effects can be ensured by making the compression height between the tips of the upper and lower push-in parts higher than the compression height of the lead wire crimping part. Can be obtained.

Further, a part of the end portion in the width direction of the sealing portion is provided notches, as notch on the inside, by compressing rounded crimp portion, by the thickness of the sealing portion, The compression height of the sealing part in a notch part can be made higher than the compression height of a conducting wire crimping part.

  Moreover, an appropriate amount of compression can be ensured by making the thickness of the resin provided in the sealing portion thicker than the thickness of the resin provided in the other part.

  Further, by arranging the resin so as to overlap a part of the serration provided in the lead wire crimping portion, it is possible to suppress the resin from being displaced during the crimping or the like.

Further, by providing the notch portion in a part of the resin of the portion which becomes the inside of the crimp portion, when compressed, it is possible to suppress the thickness of the bonding portion becomes thick.

Also, the width of the guide wire bonding portion wider than the width of the insulation crimp portion, the end portion of the conductor crimping portion of the on the outside side to protrude in the width direction than the end of the insulation crimp portion of the on the outside side Thereby, the lapping margin of the lead wire crimping portion having a high crimping rate can be increased.

  In addition, if the ends of the barrels facing each other are overlapped with each other and the ends of the barrels facing each other are abutted with each other, the thickness of the coated crimping portion is large. It can be suppressed.

  Thus, since the connection part of an electric wire conductor and a crimping | compression-bonding part can be reliably sealed with resin, generation | occurrence | production of an electric corrosion can be suppressed also at the time of the connection of a dissimilar metal.

  A second invention is a wire harness in which a plurality of electric wires with terminals according to the first invention are bundled.

  In the present invention, a plurality of electric wires with terminals can be bundled and used.

  ADVANTAGE OF THE INVENTION According to this invention, the electric wire with a terminal etc. which can acquire the water stop in the front end side of a conductor crimping part more reliably can be provided.

The perspective view of the terminal 1. FIG. The expansion | deployment top view of the terminal 1. FIG. The perspective view of the state which has arrange | positioned the covering conducting wire 17 to the terminal 1. FIG. The perspective view of the state which rounded the crimping | compression-bonding part 5. FIG. The perspective view of the state which compressed the crimping | compression-bonding part 5. FIG. Sectional drawing of the longitudinal direction of the state which compressed the crimping | compression-bonding part 5. FIG. (A), (b) is sectional drawing of the longitudinal direction of the state which compressed the crimping | compression-bonding part 5 into the other shape. The expansion | deployment top view of the terminal 1a. GG sectional drawing of FIG. The expansion | deployment top view of the terminal 1b. The expansion | deployment top view of the terminal 1c. The expansion | deployment top view of the terminal 1d. The perspective view of the state which rounded the crimping | compression-bonding part 5 of the terminal 1d. The perspective view of the other state which rounded the crimping | compression-bonding part 5 of the terminal 1d. The expansion | deployment top view of the terminal 1e. Sectional drawing of the longitudinal direction of the state which compressed the crimping | compression-bonding part 5 of the terminal 1e. The perspective view of the other state which rounded the crimping | compression-bonding part 5 of the terminal 1. FIG. The perspective view of the terminal 1f.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a terminal 1 connected to a coated conductor, and FIG. 2 is a developed plan view of the terminal 1. The terminal 1 is made of, for example, copper or a copper alloy, and includes a terminal body 3 and a crimping portion 5. The terminal body 3 is formed by forming a plate-shaped material having a predetermined shape into a cylindrical body having a rectangular cross section. The terminal body 3 has an elastic contact piece formed by folding a plate-shaped material into a rectangular cylinder. The terminal body 3 is connected by inserting a male terminal or the like from the front end. In the following description, an example is shown in which the terminal body 3 is a female terminal that allows insertion of an insertion tab (not shown) such as a male terminal. In the present invention, the detailed shape of the terminal body 3 is shown. Is not particularly limited. For example, instead of the female terminal body 3, for example, a male terminal insertion tab may be provided.

  The crimping part 5 is a part to be crimped to the coated conductor, and has a barrel shape in which a cross-sectional shape perpendicular to the longitudinal direction of the terminal 1 is substantially U-shaped. The crimp portion 5 includes a lead wire crimping portion 7 for crimping the conductor portion exposed from the sheath portion to the distal end side of the sheathed conductor wire, a sheath crimp portion 9 for crimping a portion of the sheath portion of the sheathed conductor, and a conductor portion of the sheathed conductor wire. Further, it includes a sealing portion 15 that seals the distal end of the crimp portion 5 (the end portion on the terminal body 3 side). The conducting wire crimping portion 7, the covering crimping portion 9, and the sealing portion 15 are integrally formed. That is, the crimping part 5 includes a sealing part 15, a conductor crimping part 7, and a covering crimping part 9 in this order from the terminal body 3 side.

  A serration 11 is provided in a part of the inner surface of the conductor crimping portion 7 in the width direction (circumferential direction when the crimping portion 5 described later is rounded). By forming the serrations 11 in this manner, when the conducting wire is crimped, the oxide film on the surface of the conducting wire can be easily broken, and the contact area with the conducting wire can be increased. In the present embodiment, since the serration 11 is formed to extend in at least one of the width directions, the area of the serration 11 that comes into contact with the conductor at the time of crimping can be further increased.

  Resin 13 is disposed in a portion other than the full width of sealing portion 15 and cover crimping portion 9 and serration 11 of conductive wire crimping portion 7. That is, the resin 13 is disposed on at least a part of the inner surface of the crimping part 5. In addition, when the thickness of the metal part of the crimping | compression-bonding part 5 is 0.3 mm, the thickness of the resin 13 is about 0.1-0.2 mm, for example.

  The resin 13 is, for example, polyamide imide. The resin 13 may be provided on a predetermined portion of the terminal 1 by coating, and a resin sheet such as butyl rubber, silicone rubber, epoxy resin, urethane rubber or the like previously formed in a predetermined shape is attached to a predetermined position. Also good. Further, the resin 13 may be arranged in a developed state before being molded into a terminal shape, or may be arranged after being molded into a terminal shape.

  Next, a method for connecting the coated conductor and the terminal 1 will be described. First, as shown in FIG. 3, the covering portion 21 having a predetermined length at the tip of the covered conducting wire 17 is removed to expose the conducting wire 19. Note that the conductive wire 19 of the covered conductive wire 17 is preferably made of aluminum or an aluminum alloy.

  Next, the tip of the coated conducting wire 17 is disposed on the crimping part 5. Under the present circumstances, the conducting wire 19 exposed from the coating | coated part 21 is arrange | positioned at the conducting wire crimping | compression-bonding part 7 (formation part of the serration 11), and the coating | coated part 21 is arrange | positioned at the covering crimping | compression-bonding part 9.

  Next, as shown in FIG. 4, in the crimping portion 5, the plate-like material is rounded so as to form a cylindrical body having a circular cross section so that the tips of the opposing barrels overlap each other. That is, the terminal 1 is an overlap type in which ends of opposing barrels overlap each other during crimping. At this time, the crimping portion 5 is rounded so that the end portion on the side where the serration 11 is formed is positioned inside. In addition, when the crimping | compression-bonding part 5 is rounded, the diameter of the covering crimping part 9 is larger than that of the conductor crimping part 7.

  Next, as shown in FIG. 5, the crimping portion 5 is collectively compressed with a mold (not shown) to crimp the covering portion 21 of the coated conductor 17 with the covering crimping portion 9, and the lead crimping portion 7. Then, the conductive wire 19 exposed from the covering portion 21 is crimped. At this time, the sealing portion 15 is compressed and the tip of the crimping portion 5 is sealed. In this way, the terminal-attached electric wire 20 to which the terminal 1 and the covered conductor 17 are connected is formed.

  FIG. 6 is a cross-sectional view of the crimping portion 5 in the longitudinal direction. When the crimping part 5 is compressed and the terminal 1 and the coated conductor 17 are crimped, the resin 13 is compressed between the outer peripheral part of the coating part 21 and the coated crimping part 9. The resin 13 is also compressed between the overlapping portions of the barrels. The resin 13 is also compressed in the sealing portion 15. In addition, since the resin 13 is not disposed on the serration 11, the conducting wire 19 and the conducting wire crimping portion 7 are electrically connected.

  Here, as suitable crimping | compression-bonding conditions, the compression rate of a conducting-wire crimping | compression-bonding part is 40 to 70%, and the compression rate of a covering crimping part is 60 to 90%. Here, the compression ratio of the crimping part is calculated by (cross-sectional area after compression) / (cross-sectional area before compression). That is, the compression rate of the lead wire crimping portion is (cross-sectional area of the lead wire 19 after compression) / (cross-sectional area of the lead wire 19 before compression), and the compression rate of the covering crimping portion is (the coating portion 21 after compression). Is the cross-sectional area of the coated conducting wire 17) / (the cross-sectional area of the coated conducting wire 17 in the coated portion 21 before compression). If the compression rate is not appropriate, sufficient water stoppage and pull-out strength cannot be obtained.

  The compression height (B in the figure) of the sealing part 15 is higher than the compression height (A in the figure) of the conductor crimping part 7. That is, the wire crimping portion 7 has a larger compression amount than the sealing portion 15. Moreover, it is desirable that the compression height (B in the drawing) of the sealing portion 15 is lower than the compression height (C in the drawing) of the covering crimping portion 9. Here, the compression height refers to the height of the inner surface of the crimping portion of the terminal at the center in the terminal width direction.

  By reducing the compression height of the lead wire crimping portion 7, conduction between the lead wire 19 and the lead wire crimping portion 7 can be reliably obtained. Further, if the compression height of the sealing portion 15 becomes too low (that is, if the compression amount of the sealing portion 15 is too large), a so-called bend-up that bends between the crimping portion 5 and the terminal body 3 may occur. In the worst case, the terminal body 3 and the crimping part 5 may be broken.

  Moreover, when the sealing part 15 is strongly crimped | bonded, it will become a so-called trumpet shape that the edge part of the crimping | compression-bonding part 5 will open, and there exists a possibility that water stop may fall as a result. Moreover, when the resin 13 of the sealing part 15 is compressed too strongly, the resin 13 is likely to deteriorate over time due to the compressive strain, and the durability may be lowered. In the present invention, by making the compression amount of the sealing portion 15 appropriate, it is possible to ensure the water-stopping property of the sealing portion 15 with certainty.

  On the other hand, if the amount of compression of the sealing portion 15 is not sufficient, it may be difficult to ensure water stopping. Therefore, the sealing part 15 is more reliably secured by compressing the sealing part 15 to such an extent that it does not exceed the compression height of the coated crimping part 9.

  Note that, as shown in FIG. 7A, a pushing portion 23 may be formed in a part of the sealing portion 15. In the example shown in FIG. 7A, a push-in portion 23 that protrudes toward the inner surface is provided above the sealing portion 15. The pushing portion 23 has a gentle arc shape. By setting it as circular arc shape, it can prevent that the clearance gap is formed in the resin 13 in the base vicinity of the inner surface of the pushing part 23, etc., and can ensure water-stopping reliably.

  Thus, when forming the pushing part 23, the compression height (D in a figure) in the front-end | tip of the pushing part 23 should just be higher than the compression height (A in a figure) of a conducting wire crimping part. In addition, the compression height (D in the drawing) of the sealing portion 15 at the tip of the push-in portion 23 is desirably lower than the compression height (C in the drawing) of the covering crimping portion 9.

  In addition, as shown in FIG. 7B, push-in portions 23 may be formed above and below the sealing portion 15. Thus, when forming the pushing part 23, the compression height (E in a figure) in the front-end | tips of the upper and lower pushing parts 23 should just be higher than the compression height (A in a figure) of a conducting wire crimping part. . Moreover, it is desirable that the compression height (E in the figure) between the tips of the push-in part 23 is lower than the compression height (C in the figure) of the coated crimping part 9.

  As described above, according to the present embodiment, the compression height of the sealing portion 15 does not become lower than the compression height of the lead wire crimping portion 7, so that the bend-up is caused by the strong pressure bonding of the sealing portion 15. Generation | occurrence | production and the fall of a water stop can be suppressed.

  Moreover, since the compression height of the sealing part 15 does not exceed the compression height of the coating | compression-bonding crimping part 9, the fall of the water stop due to insufficient compression can be suppressed.

  Further, by forming the pushing portion 23 in the sealing portion 15, it is possible to ensure the water-stopping property of the sealing portion 15 with certainty. At this time, since the shape of the pushing portion 23 is gently formed in an arc shape from the portion other than the pushing portion 23 on the inner surface side, no gap is formed between the resin 13 and the sealing portion 15. In addition, since no local stress is applied to the resin 13, water stoppage can be ensured.

  Even when the push-in part 23 is formed, the compression height at the tip of the push-in part 23 does not become lower than the compression height of the lead wire crimping part 7, so that the sealing part 15 is strongly pressure-bonded. Generation | occurrence | production and the fall of a water stop can be suppressed.

(Second Embodiment)
Next, a second embodiment will be described. FIG. 8 is a developed plan view of the terminal 1a according to the second embodiment, and FIG. 9 is a sectional view taken along the line GG of FIG. In the following description, components having the same functions as those of the terminal 1 and the like are denoted by the same reference numerals as those in FIGS. 1 to 7 and redundant description is omitted.

  The terminal 1a has substantially the same configuration as the terminal 1, but the form of the resin 13 is different. The thickness of the resin 13 of the terminal 1a varies depending on the part. The thickness of the resin 13 provided at the site of the sealing portion 15 (H in the figure) is thicker than the thickness of the resin 13 provided at the other site (F in the figure and the lead wire crimping portion 7 and the coated crimping portion 9). .

  When the thickness of the resin 13 at the site of the sealing portion 15 is increased, the compression height of the sealing portion 15 is made higher than the compression height of the lead wire crimping portion 7 and the compression strength of the resin 13 is made appropriate. In addition, the sealing portion 15 can be reliably sealed. By increasing the thickness, it becomes easy for excess resin 13 to protrude to the terminal body 3 side during compression, and as described above, excessive compressive stress of resin 13 can be suppressed.

  Moreover, since the resin 13 of the conducting wire crimping part 7 and the coated crimping part 9 is thin, it is possible to suppress an increase in the outer diameter of the coated crimping part 9 particularly when the coated crimping part 9 is compressed. Since the increase in the outer diameter of the cover crimping portion 9 can be suppressed, the terminal 1a can be attached to the connector without increasing the cavity size of the connector.

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. In addition, by changing the thickness of the resin 13 depending on the part, it is possible to reliably ensure water-stopping and to prevent the outer diameter of the crimping part 5 from becoming too thick.

(Third embodiment)
Next, a third embodiment will be described. FIG. 10 is a developed plan view of the terminal 1b according to the third embodiment. The terminal 1b has substantially the same configuration as the terminal 1, but the arrangement of the resin 13 is different. The resin 13 of the terminal 1b is disposed so as to overlap a part of the serration 11. For example, in the illustrated example, the resin 13 is overlaid on one row of the serrations 11 on the terminal body 3 side. In addition, the serration 11 on which the resin 13 is overlaid may be on the coated crimping part 9 side, or may be both.

  In the lead wire crimping portion 7, electrical continuity with the lead wire 19 can be obtained by the serration 11 not covered with the resin 13. On the other hand, since a part of the resin 13 overlaps with the serration 11, the effect of preventing the positional deviation of the resin 13 can be obtained even during pressure bonding.

  In addition, since the movement of the resin 13 in the portion overlapping the serration 11 is restricted, the resin 13 flows toward the outside during the pressure bonding. In particular, if the overlapping portion of the resin 13 and the serration 11 is on the terminal body 3 side, the resin 13 flows to the sealing portion 15 side, and the sealing portion 15 can be reliably sealed. Even in this case, since the compression height of the sealing portion 15 is higher than that of the lead wire crimping portion 7, the resin 13 efficiently flows to the sealing portion 15 and the amount of compression of the resin 13 is appropriate. Can be secured.

  According to the third embodiment, an effect similar to that of the first embodiment can be obtained. In addition, it is possible to efficiently regulate the positional deviation when the resin 13 is pressed and the flow direction of the resin 13.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 11 is a developed plan view of a terminal 1c according to the fourth embodiment. The terminal 1c has substantially the same configuration as that of the terminal 1 except that the resin 13 is not disposed on the substantially entire surface of the crimping portion 5 but a resin notch 25 is formed.

  The resin notch 25 is obtained by cutting out a part of the resin 13 at the edge on the inner side of the crimping part 5 when the crimping part 5 is rolled. The resin notch 25 may be formed on at least a part of the edge side on the inner side when the crimping part 5 is rolled, but as shown in the figure, it is formed in the covering crimping part 9. It is desirable. Since the coated crimping part 9 has a high compression height and is the thickest part even after crimping, the coated crimping part 9 after crimping by the thickness of the resin 13 is formed by forming the resin notch 25. The outer diameter of the can be reduced.

  Moreover, it is desirable that the formation width (left and right direction in the figure) of the resin notch portion 25 is narrower than the lapping margin when the crimping portion 5 is rounded. By doing in this way, when the crimping | compression-bonding part 5 is rounded, the resin 13 is arrange | positioned to at least one part of a wrap part, and it can ensure the water stop of a wrap part.

  According to the fourth embodiment, an effect similar to that of the first embodiment can be obtained. Moreover, it can suppress that the outer diameter of the crimping | compression-bonding part 5 after crimping | compression-bonding becomes thick by forming the resin notch part 25. FIG.

(Fifth embodiment)
Next, a fifth embodiment will be described. FIG. 12 is a developed plan view of a terminal 1d according to the fifth embodiment. The terminal 1d has substantially the same configuration as that of the terminal 1, but when the crimping portion 5 is rolled up, the lead wire crimping portion 7 on the outer side and the end of the sealing portion 15 are covered and crimped on the outer side. Projecting in the width direction from the end of the portion 9, a width direction projecting portion 27 is formed. That is, the widths of the lead wire crimping part 7 and the sealing part 15 are wider than the width of the covering crimping part 9.

  The resin 13 is formed on substantially the entire surface of the crimping part 5 excluding the serration 11. That is, the resin 13 is also disposed in the width direction protruding portion 27.

  FIG. 13 is a perspective view showing a state where the crimping portion 5 of the terminal 1d is rounded. As shown in the figure, in this embodiment, the wrap margin between the barrels in the conductor crimp portion 7 and the sealing portion 15 (in the circumferential direction) is larger than the lap margin between the barrels in the coated crimp portion 9 (wrap length in the circumferential direction). (Lap length) is larger. That is, the lap allowance between the barrels in the cover crimping portion 9 is different from the wrap allowance between the barrels in the conductor crimping portion 7 and the sealing portion 15.

  When the crimping part 5 is crimped in this state, the wrap margin between the barrels in the lead crimping part 7 that is particularly strong crimping and the sealing part 15 at the tip thereof becomes large. For this reason, the infiltration of water from the wrap portion can be suppressed. If the wrap allowance between the barrels in the conductive wire crimping portion 7 can be secured, the lap allowance between the barrels in the sealing portion 15 does not necessarily need to be larger than the wrap allowance in the coated crimping portion 9. That is, at least the lap allowance between the barrels in the formation range of the serration 11 in the lead wire crimping portion 7 may be made larger than the wrap allowance of other portions.

  According to the fifth embodiment, an effect similar to that of the first embodiment can be obtained. Moreover, in the conducting wire crimping part 7 of the strong crimping part, water can be prevented from entering from the lap part between the barrels.

(Sixth embodiment)
Next, a sixth embodiment will be described. FIG. 14 is a perspective view showing another embodiment of the terminal 1d described above. As described above, the terminal 1d has substantially the same configuration as the terminal 1, but when the crimping portion 5 is rounded, the ends of the lead wire crimping portion 7 and the sealing portion 15 on the outer side are on the outside. The width direction protrusion part 27 is protruded in the width direction from the end part of the cover crimping part 9 on the side to be formed.

  In the present embodiment, in the coated crimping portion 9, the barrel ends do not wrap, but the barrel end portions are butted against each other at the butting portion 29, and are welded and integrated by, for example, laser welding. That is, the cover crimping portion 9 is formed by rounding a plate-like material so as to form a cylindrical body having a circular cross section, butting the edges of the plate-like material together and joining them together at the butting portion 29. . The covered conducting wire 17 is inserted from the rear end portion of the crimp portion 5 formed in a cylindrical shape. By doing in this way, since the barrels do not overlap in the coated crimping part 9, it is possible to prevent the coated crimped part 9 from becoming thick.

  On the other hand, since the conducting wire crimping portion 7 and the sealing portion 15 are not thicker than the covering crimping portion 9, the end portions of the opposing barrels are overlapped with each other, and the water stoppage can be obtained by the resin 13.

  According to the sixth embodiment, the same effects as those of the first embodiment can be obtained. In addition, since the barrels do not wrap in the coated crimping portion 9, the barrels do not overlap in the coated crimped portion 9, and the coated crimped portion 9 can be prevented from becoming thick.

(Seventh embodiment)
Next, a seventh embodiment will be described. FIG. 15 is a developed plan view of the terminal 1e according to the seventh embodiment, and FIG. 16 is a longitudinal sectional view of the crimping portion 5. As shown in FIG. The terminal 1e has substantially the same configuration as the terminal 1, but the form of the sealing portion 15 is different.

  As shown in FIG. 15, the terminal 1 e has a notch 31 formed in a part of the sealing part 15. The notch portion 31 is formed in a part of the vicinity of the end portion on the inner side when the crimping portion 5 is rounded and the end portions are overlapped with each other.

  In addition, the terminal 1 e has a protrusion 33 formed on a part of the sealing portion 15. The protrusion 33 protrudes in the direction of the terminal main body 3 from the end portion of the crimping portion 5 in the vicinity of the end portion on the outer side when the crimping portion 5 is rounded and the ends are overlapped with each other. The resin 13 does not need to be disposed on the protrusion 33.

  As shown in FIG. 16, when the crimping part 5 is rounded and compressed so that the notch part 31 is inside, and the coated conductor 17 is crimped to the terminal 1e, the sealing part 15 has the thickness of the notch part 31. Only the compression height (I in the figure) becomes higher. That is, in this case, the compression height of the sealing portion 15 is from the bottom surface to the inner surface of the outer barrel that is overlapped. Therefore, the compression height (I in the figure) in the notch 31 of the sealing part 15 can be easily made higher than the compression height (A in the figure) of the conductor crimping part 7. That is, even when the outer dimensions of the sealed portion after crimping are not changed, the compression rate in the sealed portion 15 is increased by the amount of the notch 31 formed, and the crimped portion 5 and the terminal body 3 Bend-up that bends between is less likely to occur.

  Even in this case, it is desirable that the compression height of the sealing portion 15 is lower than the compression height (C in the figure) of the coated crimping portion 9.

  Further, the protrusion 33 is bent so as to close a part of the opening at the tip of the sealing portion 15. The protrusion 33 suppresses the resin 13 of the sealing part 15 from flowing out during compression, and holds the resin 13 in the sealing part 15. By doing in this way, the resin 13 in the sealing part 15 can be hold | maintained appropriately, and water stop can be ensured.

  According to the seventh embodiment, the same effects as those of the first embodiment can be obtained. Further, the cutout portion 31 can easily increase the compression height of the sealing portion 15. Moreover, the protrusion 33 can suppress the resin 13 in the sealing portion 15 from flowing out.

(Eighth embodiment)
Next, an eighth embodiment will be described. FIG. 17 is a perspective view in which the crimping portion 5 of the terminal 1 is rounded. In the embodiment described so far, at least the lead wire crimping portion 7 and the sealing portion 15 are barrels that are overlapped with each other, but in this embodiment, the butting portion 29 extends over the entire length of the crimping portion 5. Is formed.

  In this case, the plate-like material is rounded over the entire length of the crimping portion 5 of the terminal 1 so as to form a cylindrical body having a circular cross section, and the edges of the plate-like material are butted together and joined together by the butting portion 29. Thereby, the crimping | compression-bonding part 5 is formed. That is, in the crimping | compression-bonding part 5, barrels do not overlap, but edge parts are welded and it forms in a cylinder shape.

  According to the eighth embodiment, an effect similar to that of the first embodiment can be obtained. Moreover, since the wrap portion is not formed, the water ingress route is reduced, and the water stoppage can be increased. In the embodiment shown in FIG. 14, the weld length of this embodiment is shortened.

(Ninth embodiment)
Next, a ninth embodiment will be described. FIG. 18 is a perspective view showing the terminal 1f. In the embodiments described so far, the crimping part 5 has a substantially U-shaped barrel shape, and the crimping part 5 is formed integrally with the covering crimping part 9, the conductor crimping part 7, and the sealing part 15. However, the terminal 1f of the present embodiment is a so-called F-crimp type.

  The terminal 1 f is formed by separating the sealing portion 15 and the conductive wire crimping portion 7 from the covering crimping portion 9. Even in this case, the covered conducting wire 17 can be crimped | bonded by arrange | positioning the covering conducting wire 17 in a crimping | compression-bonding part, and compressing each of the sealing part 15, the conducting wire crimping part 7, and the covering crimping | compression-bonding part 9. .

  In this case, water may enter from between the sealing portion 15 and the conductor crimping portion 7 and the covering crimping portion 9, but the leading end side of the conductor 19 that has the greatest influence on corrosion is sealed. By reliably performing, for example, indoor wiring can prevent the occurrence of corrosion. Moreover, you may coat | cover with resin etc. after pressure bonding as needed.

  According to the ninth embodiment, an effect similar to that of the first embodiment can be obtained. Thus, the present invention can be applied to various types of terminals.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, the above-described embodiments can be combined with each other. Moreover, a plurality of electric wires with terminals according to the present invention can be bundled and used as a wire harness.

1, 1a, 1b, 1c, 1d, 1e, 1f ......... Terminal 3 ......... Terminal body 5 ......... Crimp section 7 ... Conductor crimp section 9 ... Coating crimp section 11 ... Serration 13 ... …… Resin 15 ……… Sealed part 17 ……… Coated conductor 19 ……… Conductor 20 ……… Wire with terminal 21 ……… Coating part 23 ……… Pushing part 25 ……… Resin notch part 27… …… Width-direction projecting portion 29 ............ Matching portion 31 ............ Notch portion 33 ………… Protrusion

Claims (12)

A terminal-attached electric wire in which a terminal and a coated conductor are connected,
The terminal is
A crimping portion to which the coated conductor is crimped, and a terminal body;
The crimping portion includes a coating crimping portion for crimping the covering part of the coated conductive wire, and a wire crimping portion for crimping the conductor exposed from the covering portion, and the sealing portion of the terminal body side of the conductor crimp portion It is formed in one piece,
The crimping part is an overlap type in which ends of opposing barrels overlap each other during crimping,
Resin is disposed on at least a part of the inner surface of the crimp portion,
An electric wire with a terminal, wherein the compression height of the sealing portion is higher than the compression height of the lead wire crimping portion, with the height of the inner surface of the crimping portion at the center in the terminal width direction being a compression height.   The terminal-attached electric wire according to claim 1, wherein a compression height of the sealing portion is lower than a compression height of the covering crimping portion.   The said sealing part is provided with the pushing part which protrudes to an inner surface side, The compression height in the front-end | tip of the said pushing part is higher than the compression height of the said conductor crimping | compression-bonding part. The electric wire with a terminal of 2.   4. The terminal according to claim 3, wherein the pushing portion is formed above and below the sealing portion, and a compression height between tips of the upper and lower pushing portions is higher than a compression height of the conductor crimping portion. With electric wire. Notch is provided in a portion near the end of the width direction of the front Kifutome portion,
The crimping part is rounded and compressed so that the notch is on the inside, and the compression height in the notch is higher than the compression height of the conductor crimping part. The electric wire with a terminal according to any one of claims 1 to 4.   The electric wire with a terminal according to any one of claims 1 to 5, wherein a thickness of the resin provided in the sealing portion is thicker than a thickness of the resin provided in another portion. The lead wire crimping portion is provided with serrations,
The said resin is arrange | positioned so that it may overlap with a part of said serration, The electric wire with a terminal in any one of Claims 1-6 characterized by the above-mentioned. An electric wire with terminal according to any one of claims 1 to 7, wherein at least part of which is cut out of the resin of the portion on the inside of the front Symbol crimping portion. Width before Symbol conductor crimping portion is wider than the width of the insulation crimp portion, the end portion of the conductor crimping portion of the on the outside side is, in the widthwise direction than an end portion of the insulation crimp portion on the outside side It protrudes, The electric wire with a terminal in any one of Claims 1-8 characterized by the above-mentioned. Before Symbol crimping portion, the wire crimping portion and the sealing portion, of them overlap end portions of the barrel facing each other, said insulation crimp portion, the end portions of the barrel opposite is butted to each other The electric wire with a terminal according to any one of claims 1 to 8, characterized by.   The said terminal is a product made from copper or a copper alloy, and the conducting wire of the said covered conducting wire is a product made from aluminum or aluminum alloy, The electric wire with a terminal in any one of Claims 1-10 characterized by the above-mentioned. A wire harness in which a plurality of electric wires with terminals according to any one of claims 1 to 11 are bundled.

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