JP7109351B2 - connector terminal - Google Patents

Description

TECHNICAL FIELD The present invention relates to a connector terminal, and more particularly to a connector terminal that is attached to the tip of a cable having an outer peripheral surface made of an insulating coating.

For example, Patent Literature 1 discloses a connector terminal 2 attached to the tip of a cable 1, as shown in FIG. The cable 1 has a structure in which the outer periphery of the core wire 3 is covered with a resin insulating coating 4, and the connector terminal 2 includes a metal terminal body 5 extending in the extension direction of the cable 1 and a terminal body 5. has a separately formed metal crimping member 6 .

At the tip of the cable 1, the portion where the core wire 3 is covered with the insulating coating 4 is overlapped with the insulation barrel portion 7 formed in the terminal body 5, and crimped to the outer periphery of the core wire 3 exposed from the insulating coating 4. The portion around which the member 6 is wound is overlaid on the wire barrel portion 8 formed on the terminal body 5 . By crimping the insulation barrel portion 7 and the wire barrel portion 8 in this state, the insulation barrel portion 7 is bent so as to wrap around the insulating coating 4 and crimped, and the wire barrel portion 8 is attached to the core wire 3 and the crimping member. It is bent so as to wrap around 6 and crimped.

As shown in FIG. 26, the crimping member 6 is pre-formed with a thick portion 6A, whereby the core wire 3 is compressed at a high compression ratio by the thickness of the thick portion 6A, and the core wire 3 is It is intended to secure the holding force of the connector terminal 2 against and to improve the connection reliability.

JP 2014-56753 A

However, for example, in a multicore cable having a structure in which a plurality of electric wires each having a structure in which the outer peripheral portion of each conductor portion is covered with an insulator portion are bundled and covered with an insulating coating, the insulation barrel of Patent Document 1 It is desired to fix the connector terminal to the cable by crimping from above the insulating coating covering the plurality of electric wires as in the portion 7 .

Therefore, for example, in the connector terminal 2 of Patent Document 1 shown in FIG. is firmly fixed to the cable 1, the thick portion 6A of the crimping member 6 is pressed toward the insulating coating 4, but the insulating coating 4 is more elastic than the metal core wire 3. , the connector terminal 2 tends to be displaced with respect to the cable 1 during the manufacturing process.

If the crimping member 6 had a sharp projection that would catch on the insulating coating 4 instead of the thick portion 6A, the connector terminal 2 would be less likely to be misaligned with respect to the cable 1. By crimping the barrel portion 7, the crimping member 6 is compressed, and the projection may bite into the conductor portion of the electric wire covered with the insulating coating 4, causing disconnection.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a connector terminal capable of preventing wire breakage while being firmly fixed to a cable.

A connector terminal according to the present invention is a connector terminal that is attached to the tip of a cable having at least one electric wire and an outer peripheral surface made of an insulating coating, and is made of a metal plate rolled into a cylindrical shape. and a terminal fitting having a barrel disposed so as to overlap the outer periphery of the sleeve and crimped together with the sleeve. It has at least one projection made of a part of the metal plate cut and raised on the peripheral surface side, and is attached to the insulating coating.

Preferably, the sleeve has a sleeve end extending in the direction of cable extension to a position that does not overlap the barrel, and the protrusion is located at the sleeve end.
Further, the metal plate has a bottom wall curved to form a part of a cylindrical shape, and a pair of flat plate portions rising from both ends of the bottom wall in the curved direction, and the sleeve has a pair of Preferably, the flat plate portions are each made of a curved metal plate forming a part of a cylindrical shape, and the projections are arranged on the pair of flat plate portions, respectively.
The projection preferably has a shape in which an L-shaped cutout portion is bent in the thickness direction of the flat plate portion at the edge of the corresponding flat plate portion. In this case, the projection can be cut and raised by the thickness of the corresponding flat plate portion.

Preferably, the cable has a shielding braid arranged on the inner peripheral side of the insulating coating, and the shielding braid is sandwiched between the sleeve and the barrel.
Also, it is preferable to include at least one signal terminal connected to the tip of at least one electric wire, and an internal housing that holds the at least one signal terminal and is accommodated inside the terminal fitting.

According to the present invention, the sleeve has at least one projection made of a part of the metal plate which is arranged at a position not overlapping with the barrel of the terminal fitting and which is cut and raised on the inner peripheral surface side of the sleeve. Since it is attached, it is possible to prevent disconnection of the electric wire while being firmly fixed to the cable.

It is the perspective view which looked at the connector terminal which concerns on embodiment from diagonally back. It is the perspective view which looked at the connector terminal which concerns on embodiment from diagonally forward. It is a side view which shows the connector terminal which concerns on embodiment. Fig. 3 is a cross-sectional view of a cable; 4 is a cross-sectional view taken along line AA of FIG. 3; FIG. FIG. 6 is a cross-sectional view taken along line BB of FIG. 5; FIG. 4 is a perspective view showing a sleeve metal plate; FIG. 4 is a front view showing a sleeve metal plate; FIG. 4 is a perspective view showing a state in which a cable is aligned with a sleeve metal plate; FIG. 4 is a side view showing a state in which the cable is aligned with the sleeve metal plate; 11 is a cross-sectional view taken along line CC of FIG. 10; FIG. Fig. 2 is a perspective view showing a cable with a sleeve attached; Fig. 10 is a side view showing a cable with a sleeve attached; FIG. 14 is a cross-sectional view taken along line DD of FIG. 13; FIG. 4 is a perspective view showing a state in which part of the shield braid of the cable has been removed; FIG. 4 is a perspective view showing a state in which the shield braid of the cable is folded back over the sleeve; FIG. 4 is a perspective view showing a state in which a holding tape for a cable has been removed; FIG. 4 is a perspective view showing a state in which conductor portions are exposed at the tip portions of a plurality of electric wires of the cable; 4 is a perspective view showing a state in which signal terminals are connected to a plurality of electric wires of a cable; FIG. FIG. 4 is a perspective view showing a state in which an inner housing is attached to a plurality of electric wires of a cable; FIG. 4 is a perspective view showing a state in which a wire shield member is attached to exposed portions of a plurality of electric wires of a cable; FIG. 4 is a perspective view showing a state in which a cable is aligned with a terminal fitting; FIG. 4 is a side view showing a state in which a cable is aligned with a terminal fitting; FIG. 24 is a cross-sectional view taken along line EE of FIG. 23; FIG. 11 is a side view showing a conventional connector terminal; FIG. 10 is a partial cross-sectional view showing a conventional connector terminal;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, a connector terminal 11 according to an embodiment of the present invention is attached to the tip of a cable 41, and comprises a sleeve 21 and a terminal fitting 31 which are formed independently of each other. I have it.
The sleeve 21 is formed of a metal plate rolled into a cylindrical shape, and is arranged so as to surround the outer peripheral portion of the cable 41 .

The terminal fitting 31 is formed of a gutter-shaped shield shell 32 with an open top and a cover shell 33 that covers and closes the top of the shield shell 32 . The front end is open.
As shown in FIG. 2, the inner housing 51 attached to the tip of the cable 41 and a plurality of signal terminals 52 held in the inner housing 51 are exposed through the open front end of the terminal fitting 31. ing.
In addition, the terminal fitting 31 has a barrel 34 arranged at the rear end along the extension direction D1 of the cable 41 . The barrel 34 is wound so as to overlap the outer periphery of the sleeve 21, and is formed integrally with the rear end of the shield shell 32 of the terminal fitting 31, as shown in FIG.

Here, FIG. 4 shows a cross section of the cable 41. As shown in FIG. The cable 41 includes, for example, four electric wires 42 , a holding tape 43 for bundling the four electric wires 42 , and a metal wire that covers the outer circumference of the holding tape 43 so as to surround the outer circumference of the four electric wires 42 . It has a shield braid 44 and a resin insulating coating 45 that covers the outer periphery of the shield braid 44 . Each of the four electric wires 42 has a structure in which the outer peripheral portion of the conductor portion 42A is covered with the insulator portion 42B.

As shown in FIG. 5, a barrel 34 wrapped over the outer circumference of sleeve 21 is crimped therewith. At this time, as shown in FIG. 6, the tongue-shaped portion 33A extending from the rear end of the cover shell 33 of the terminal fitting 31 in the extension direction D1 of the cable 41 overlaps the sleeve 21, and the terminal fitting 31 is closed. The barrel 34 is crimped while being wound on the outer peripheral portion of the sleeve 21 from above the tongue portion 33A.
By crimping the barrel 34 , the resin insulation coating 45 of the cable 41 is compressed and deformed, and the connector terminal 11 is firmly attached to the cable 41 .
The sleeve 21 has a length longer than that of the barrel 34 in the extension direction D1 of the cable 41, and has a sleeve front end portion 21A and a sleeve rear end portion 21B extending to a position not overlapping the barrel 34. there is

Next, a method for manufacturing the connector terminal 11 according to the embodiment will be described.
7 and 8 show a sleeve metal plate 22 for forming the sleeve 21. FIG. The sleeve metal plate 22 has a bottom wall portion 23 that is curved to form a part of a cylindrical shape, and a pair of flat plate portions 24 that rise from both ends of the bottom wall portion 23 in the direction of curvature. . The sleeve 21 is formed by bending the pair of flat plate portions 24 so as to form a portion of a cylindrical shape continuous with the bottom wall portion 23 and rolling the sleeve metal plate 22 into a cylindrical shape as a whole. The sleeve metal plate 22 has a front edge portion 22A and a rear edge portion 22B corresponding to both ends in the central axis direction of the cylinder when it is rolled into a cylindrical shape.

Further, the pair of flat plate portions 24 are formed with protrusions 25 at the edge portions corresponding to the rear edge portion 22B of the sleeve metal plate 22, respectively. The projection 25 has a shape in which an L-shaped notched portion at the edge of the flat plate portion 24 is bent in the thickness direction of the flat plate portion 24, and is formed by cutting out the flat plate portion 24. , has a sheared surface, and is cut and raised by the thickness of the flat plate portion 24 toward the inside of the curved bottom wall portion 23 .

As shown in FIG. 9, cable 41 is aligned with sleeve metal plate 22 .
Here, the cable 41 has the insulating coating 45 of a predetermined length L1 removed from the tip of the cable 41 in advance to expose the shield braid 44. As shown in FIG. The cable 41 is arranged so that the position of the front edge portion 22A of the metal plate 22 for the sleeve substantially coincides with the position of the front edge portion 22A. That is, the cable 41 is positioned so that the portion covered with the insulating coating 45 overlaps the sleeve metal plate 22 .
At this time, as shown in FIG. 11, the projections 25 of the sleeve metal plate 22 are formed on the pair of flat plate portions 24, so that the cable 41 can be moved through the sleeve metal plate 22 without being interfered by these projections 25. It is arranged on the bottom wall portion 23 of the plate 22 .

In this state, an applicator (not shown) is used to bend the pair of flat plate portions 24 of the sleeve metal plate 22 so as to form a portion of a cylindrical shape that is continuous with the bottom wall portion 23. As shown in FIG. As shown in FIG. 13, a cylindrical sleeve 21 is formed to cover the outer circumference of the insulating coating 45 of the cable 41 .

The pair of protrusions 25 formed on the rear edge portion 22B of the metal plate 22 for sleeve is located on the opposite side of the tip portion of the cable 41 by forming the sleeve 21 in a cylindrical shape from the metal plate 22 for sleeve. is disposed at the sleeve rear end 21B of the sleeve 21 facing toward.
Since the pair of protrusions 25 have a sheared surface, as shown in FIG. 41 is held in a temporarily fixed position in the extension direction D1.

In addition, the insulating coating 45 of the cable 41 has a thickness greater than the protrusion height of the projection 25 of the sleeve 21, that is, the thickness of the metal plate 22 for the sleeve. It is assumed that the shielding braid 44 of the cable 41 is not reached.

When the sleeve 21 is held by the cable 41 in this way, as shown in FIG. The shield braid 44 on the tip side is cut off, leaving only the portion L2. As a result, at the tip of the cable 41, the pressing tape 43 is exposed by the length (L1-L2).
The predetermined length L2 is set to be slightly shorter than the length of the sleeve 21 in the extension direction D1 of the cable 41 .

Next, as shown in FIG. 16, the shield braid 44 exposed from the sleeve 21 to the tip side of the cable 41 by a predetermined length L2 is folded back onto the outer circumference of the sleeve 21. Then, as shown in FIG. As a result, the pressing tape 43 is exposed by a predetermined length L1, and the exposed pressing tape 43 is removed to expose the four electric wires 42 as shown in FIG.

After that, as shown in FIG. 18, the insulator portions 42B of a predetermined length are cut off from the ends of the four electric wires 42 to expose the conductor portions 42A, and as shown in FIG. The signal terminals 52 are connected to the conductor portions 42A of the electric wires 42, respectively.
Further, as shown in FIG. 20, the inner housing 51 is assembled by accommodating and holding the signal terminals 52 of the four electric wires 42 in the inner housing 51, and as shown in FIG. A wire shield member 46 is attached to the exposed portions of the four wires 42 between the sleeve 21 and the sleeve 21 .

Next, as shown in FIG. 22, the shield shell 32 is aligned with the cable 41 having the inner housing 51 attached to the tip thereof. The inner housing 51 is accommodated inside the shield shell 32 whose upper part is open. By attaching the cover shell 33 to the shield shell 32, the upper part of the shield shell 32 is covered with the cover shell 33 so that the terminal fittings 31 are closed. It is formed.

Here, the barrel 34 integrally formed at the rear end portion of the shield shell 32 includes a bottom wall portion 34A curved to form a part of a cylindrical shape, and both ends of the bottom wall portion 34A in the curved direction. The pair of flat plate portions 34B are open to each other, and the cable 41 is covered with a folded shield braid 44. The sleeve 21 extends from the bottom wall portion 34A of the barrel 34. Aligned to overlap.
When the cover shell 33 is attached to the shield shell 32 , the tongue-shaped portion 33 A of the cover shell 33 overlaps the sleeve 21 via the folded shield braid 44 .

At this time, as shown in FIG. 23, the protrusion 25 of the sleeve 21 is arranged at the sleeve rear end portion 21B of the sleeve 21 at a position that is closer to the rear end of the cable 41 than the barrel 34 and does not overlap the barrel 34. there is
Further, as shown in FIG. 24 , the sleeve 21 is temporarily fixed to the cable 41 by hooking the pair of projections 25 of the sleeve 21 on the resin insulation coating 45 of the cable 41 .

In this state, by using an applicator (not shown), the pair of flat plate portions 34B of the barrel 34 are curved so as to form a portion of a cylindrical shape continuous with the bottom wall portion 34A and covered with the shield braid 44. The outer peripheral portion of the sleeve 21 and the tongue portion 33A of the cover shell 33 are wound so as to overlap each other.

Further, the barrel 34 is crimped along with the sleeve 21 as shown in FIG. 5, thereby completing the manufacture of the connector terminal 11 shown in FIGS. rigidly mounted. The four electric wires 42 of the cable 41 are electrically connected to the four signal terminals 52 housed in the internal housing 51 , and the shield braid 44 of the cable 41 is electrically connected to the terminal fitting 31 .

Here, the pair of protrusions 25 of the sleeve 21 are arranged at the rear end portion 21B of the sleeve at a position not overlapping the barrel 34, so that even if the barrel 34 is crimped, the protrusions 25 will not be pushed into the cable 41. Therefore, it is possible to prevent the protrusion 25 from biting into the electric wire 42 and causing disconnection.

In addition, the sleeve 21 is temporarily fixed in position with respect to the cable 41 by the protrusions 25 hooking on the insulation coating 45 of the cable 41 from the time when the sleeve 21 is held by the cable 41 to the time when the barrel 34 is crimped together with the sleeve 21 . It is held in a Therefore, the sleeve 21 is prevented from being displaced during the operation of attaching the connector terminal 11 to the tip portion of the cable 41, and the attaching operation can be performed efficiently.

In the above embodiment, the pair of protrusions 25 of the sleeve 21 are arranged at the sleeve rear end portion 21B on the rear end side of the cable 41 relative to the barrel 34. For example, even if it is arranged at the sleeve front end portion 21A on the front end side of the cable 41 rather than the barrel 34, the sleeve 21 can be temporarily fixed to the cable 41, and when the barrel 34 is crimped, This prevents the protrusion 25 from biting into the electric wire 42 and causing disconnection. The projections 25 can also be arranged on both the sleeve rear end portion 21B and the sleeve front end portion 21A.

Also, if the barrel 34 has a notch or opening, the protrusion 25 of the sleeve 21 is positioned in the notch or opening of the barrel 34 rather than on the rearward or forward side of the cable 41 relative to the barrel 34 . may be arranged at a position corresponding to Even in this way, when the barrel 34 is crimped, the protrusion 25 can be prevented from being pushed into the cable 41 and biting into the electric wire 42 .

The protrusion 25 of the sleeve 21 has a shape in which an L-shaped notched portion at the edge of the flat plate portion 24 of the sleeve metal plate 22 is bent in the thickness direction of the flat plate portion 24. However, it may be formed by cutting and raising a part of the sleeve metal plate 22 and having a sheared surface.
In addition, the sleeve 21 has a pair of projections 25 , but the present invention is not limited to this. It can be temporarily fixed to the cable 41 .

In addition, although the cable 41 has four electric wires 42 in the above-described embodiment, the cable 41 may have at least one electric wire 42 .

1 cable, 2 connector terminal, 3 core wire, 4 insulation coating, 5 terminal body, 6 crimp member, 6A thick portion, 7 insulation barrel portion, 8 wire barrel portion, 11 connector terminal, 21 sleeve, 21A sleeve front end portion, 21B sleeve rear end, 22 sleeve metal plate, 22A front edge, 22B rear edge, 23, 34A bottom wall, 24, 34B flat plate, 25 projection, 31 terminal fitting, 32 shield shell, 33 cover shell, 33A tongue portion, 34 barrel, 41 cable, 42 electric wire, 42A conductor portion, 42B insulator portion, 43 holding tape, 44 shield braid, 45 insulation coating, 46 wire shield member, 51 inner housing, 52 signal terminal, D1 extension Direction, L1, L2 Predetermined length.

Claims (7)

A connector terminal attached to the tip of a cable having at least one electric wire and having an outer peripheral surface made of an insulating coating,
a sleeve made of a metal plate rolled into a cylindrical shape and through which the cable is passed;
a terminal fitting having a barrel disposed so as to overlap the outer periphery of the sleeve and crimped together with the sleeve, wherein the sleeve is disposed at a position not overlapping the barrel of the terminal fitting and the inner periphery of the sleeve. A connector terminal having at least one projection formed by cutting and raising a part of the metal plate on the surface side and attached to the insulating coating. the sleeve has a sleeve end that extends to a position that does not overlap the barrel in the direction in which the cable extends;
2. The connector terminal of claim 1, wherein said projection is located at said sleeve end. The metal plate has a bottom wall portion curved to form a part of the cylindrical shape, and a pair of flat plate portions rising from both ends of the bottom wall portion in the direction of curvature,
The sleeve is made of the metal plate curved so that the pair of flat plate portions respectively form a part of the cylindrical shape,
3. The connector terminal according to claim 1, wherein said protrusions are arranged on said pair of flat plate portions, respectively. 4. The connector terminal according to claim 3, wherein the projection has a shape in which an L-shaped notched portion is bent in the thickness direction of the flat plate portion at the edge of the corresponding flat plate portion. 5. The connector terminal according to claim 4, wherein said projection is cut and raised by the thickness of said corresponding flat plate portion. The cable has a shield braid arranged on the inner peripheral side of the insulating coating,
6. The connector terminal according to claim 1, wherein said shield braid is sandwiched between said sleeve and said barrel. at least one signal terminal connected to the tip of the at least one electric wire;
an inner housing that holds the at least one signal terminal and is housed inside the terminal fitting.

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