JP2020064807A - Crimp terminal - Google Patents

Abstract

To provide a crimp terminal that may not damage a seal member due to a core wire that "comes apart."SOLUTION: A crimp terminal 1 of the present invention comprises: core wire barrels 37, 37 that crimp a core wire of an electric wire; coating barrels 39, 39 that are provided behind the core wire barrels 37, 37 and crimp an insulating coating of the electric wire; a base 31 that supports the core wire barrels 37, 37 and the coating barrels 39, 39; and a screen 33 that is provided behind (B) front ends 37E of the core wire barrels 37, 37 and erected from the base 31. Preferably, the crimp terminal 1 is provided with a visual recognition window 35 through which the inside of the base 31 can be visually recognized from the outside, behind (B) the screen 33 and within a range where the core wire barrels 37, 37 are provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a crimp terminal of an electric connector to which an electric wire is connected by crimping.

  The crimp terminal includes, for example, as disclosed in Patent Document 1, a core barrel for crimping a core wire of an electric wire and a coating barrel for crimping an insulating coating covering the core wire. The crimp terminal of Patent Document 1 is premised to be connected to the electrode lead, and provides a means for accurately positioning the electrode lead with respect to the mounting surface of the electrode lead in the crimp terminal. This means is to provide a stopper (46) in front of the core barrel where the electrode lead abuts and is positioned.

JP-A-11-260431

When the crimp terminal is required to be waterproof, the crimp terminal may be used by inserting it into a rubber seal member, for example, a seal hole of a family seal. If the seal member is damaged when the crimp terminal is inserted into the seal hole, the waterproof performance cannot be ensured.
The crimp terminal crimps the core wire with the core barrel, but when the core wire is composed of a plurality of core wires, so-called "splitting" occurs in which the front end of the core wire spreads radially outward due to the crimping.
In the crimp terminal of Patent Document 1, since the front end side of the core wire (20a) protrudes from the core wire barrel toward the front, the core wire is “stripped”. If this crimp terminal is inserted into the seal hole of the seal member, the front end of the core wire may abut the seal portion around the seal hole, possibly damaging the seal member.
Therefore, it is an object of the present invention to provide a crimp terminal in which there is no risk of damaging the seal member due to "stranding" of the core wire.

  The crimp terminal of the present invention includes a core barrel for crimping a core wire of an electric wire, a coating barrel provided behind the core barrel for crimping an insulating coating of an electric wire, a base portion for supporting the core barrel and the coating barrel, and a core wire barrel. And a partition which is provided at a position corresponding to or behind the front end of the and which stands up from the base.

The crimp terminal according to the present invention is preferably provided with a window that is visible from the outside to the inside, in the range behind the partition and in which the core barrel is provided.
This window is preferably provided in the base. In this case, preferably, there is a base between the screen and the window.

  According to the crimp terminal of the present invention, the partition is provided so as to match with the front end of the core wire barrel or be behind the front end. As a result, the crimped core wire is prevented from projecting further forward than the front end of the core wire barrel, and remains within the range of the core wire barrel. Therefore, even if the core wire is about to be “stripped” due to crimping of the core wire barrel, the core wire barrel is mechanically restrained. Therefore, even if the crimp terminal of the present invention is inserted into the seal member together with the crimped electric wire, there is no possibility of damaging the seal member due to the "spreading" of the core wire.

It is a perspective view showing a crimp terminal concerning an embodiment of the present invention. The crimp terminal which concerns on this embodiment is shown, (a) is a top view, (b) is a side view, (c) is a bottom view. It is a figure which shows the state which the electric wire crimped was mounted by the crimp terminal which concerns on this embodiment. It is a figure which shows the state by which the electric wire was crimped to the crimp terminal which concerns on this embodiment. The process of inserting the crimp terminal according to the present embodiment, in which the electric wire is crimped, into the seal member is shown. It is a figure explaining the effect of this embodiment. A modified example of the present embodiment will be described, (a) shows a modified example of the core wire barrel, (b) shows a modified example in which the partition and the window are shifted backward, and (c) shows the window provided on the core wire barrel. A modification is shown.

Hereinafter, a crimp terminal 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1, 4 and 5, the crimp terminal 1 includes a partition 33 that prevents the core wire 101 from projecting forward of the core wire barrel 37 after crimping. Accordingly, the core wire barrel 37 mechanically restrains the front end of the core wire 101 even if the front end of the core wire 101 is broken. Therefore, the annular seal projection 115 of the seal member 110 may be damaged when the core wire barrel 37 penetrates the seal hole 113. Absent.
Hereinafter, after the structure of the crimp terminal 1 is described, the effect of the partition 33 will be described.

[Overall structure of crimp terminal 1]
As shown in FIGS. 1 and 2, in the crimp terminal 1, the receptacle-type contact portion 10 and the crimp portion 30 for crimping the electric wire 100 are integrally formed by sheet-metal working a metal plate made of, for example, a copper alloy. Has been formed.
As shown in FIG. 5, the crimp terminal 1 is inserted so as to penetrate the seal hole 113 of the rubber seal member 110, and is sealed by the seal member 110 at the portion of the electric wire 100. The seal member 110 prevents moisture from entering the crimp terminal 1 from the side where the electric wire 100 is pulled out and adhering to the crimp terminal 1.

  As shown in FIG. 1, in the crimp terminal 1, the side where the contact portion 10 is provided is defined as the front (F), and the side where the crimp portion 30 is provided is defined as the rear (B). The front and the rear are relative definitions. For example, in the contact portion 10, the right side is rear with respect to the left end in FIG. In the crimp terminal 1, the width direction X, the longitudinal direction Y, and the height direction Z are defined as shown in FIG.

[Contact part 10]
The crimp terminal 1 is electrically connected to a mating terminal. As shown in FIGS. 1 and 2, the crimp terminal 1 of the present embodiment exemplifies a resector pull type contact portion as the contact portion 10, but the contact portion in the present invention is not limited to this. For example, a male contact portion such as a tab type may be used.
The contact portion 10 includes a box-shaped terminal body 11 having a receiving port 13 into which a tab-type terminal (not shown) is inserted and which is opened at one end side, and a receiving cavity 15 for accommodating the tab-type terminal inserted from the receiving port 13. And Inside the receiving cavity 15, inside the terminal body 11 shown in FIG. 1, there are provided a main spring leaf 16 and a slave spring leaf 17 for pressing the tab type terminals.

[Crimping part 30]
As shown in FIG. 4, the crimp portion 30 fixes the electric wire 100 to the crimp terminal 1 by crimping and is electrically connected to the core wire 101.
As shown in FIGS. 1 and 2, the crimp portion 30 includes a base portion 31 on which the electric wire 100 is placed, a pair of core wire barrels 37 and 37 supported by the base portion 31, and a pair of coating barrels 39 and 39. . Each of the core wire barrels 37, 37 rises from both ends of the base portion 31 in the width direction X, and each of the coating barrels 39, 39 rises from both ends of the base portion 31 in the width direction X. The coated barrels 39, 39 are provided behind (B) the core barrels 37, 37.

[Base 31]
As shown in FIGS. 1, 2 and 3, the base portion 31 is configured to be continuous with the contact portion 10 and extend in the longitudinal direction Y. As shown in FIG. 3, both the core wire 101 of the electric wire 100 and the insulating coating 103 are formed. Support.
A partition 33 standing upright from the base 31 is provided on the base 31.
The partition 33 is provided to prevent the core wire 101 from projecting forward (F) with respect to the core wire barrels 37, 37 due to the front end of the core wire 101 hitting. As shown in FIG. 2 (a), the partition 33 has a locking surface 34 that is aligned with the front end 37E of the core barrel 37 or is provided rearward (B) of the front end 37E in order to perform this function. . However, in this embodiment, as shown in FIG. 2A, the locking surface 34 is provided slightly rearward (B) from the front end 37E of the core barrel 37.

The partition 33 is formed by cutting and raising the base portion 31. The partition 33 in the present embodiment has a rectangular planar shape, but its shape and dimensions are arbitrary as long as it can prevent the core wire 101 from projecting forward of the core barrels 37, 37. For example, it may have a shape corresponding to the cross-sectional shape of the core wire 101 after pressure bonding.
The base 31 is formed with punched holes 32 penetrating through the front and back of the partition 33 as a remnant formed by cutting and raising the partition 33. In the present embodiment, cutting and raising are performed so that the punched hole 32 is formed in front of the partition 33.

Further, as shown in FIGS. 1 and 2, the base 31 is provided with a visual recognition window 35 that penetrates through the front and back and allows the inside of the base 31 to be visually recognized.
If the core wire 101 can be visually recognized (observed) through the visual recognition window 35, it is ensured that the core wire 101, the base 31, and the core wire barrels 37, 37 can be electrically contacted with a necessary surface area.
The viewing window 35 is provided behind the partition 33 (B). Therefore, if the front end of the core wire 101 abuts on the locking surface 34 of the partition 33, the core wire 101 can be observed through the viewing window 35. Even if the front end of the core wire 101 does not abut the locking surface 34 of the partition 33, the core wire 101 may be observed through the viewing window 35. In this case, the core wire 101, the base 31, and the core wire barrel 37, The necessary electrical contact with 37 is obtained. As one form of this, there is a case where the front end of the core wire 101 can be observed through the visual recognition window 35, and in this case as well, the position of the visual recognition window 35 and the rear portion of the visual recognition window 35 (B ), The dimensions of the base portion 31 and the core wire barrels 37, 37 are defined.

[Core barrel 37]
The core wire barrel 37 crimps the core wire 101 of the electric wire 100 to fix the core wire 101 to the crimp portion 30.
As shown in FIGS. 1 and 2, the core wire barrel 37 has a rectangular planar shape. This is an example, and the shape is arbitrary as long as the core wire 101 can be crimped. Further, although an example in which the pair of core barrels 37, 37 is provided is shown here, this is also only an example of the present invention. The core wire 101 can be crimped by one core wire barrel 37 by adjusting the shape and dimensions.

  As shown in FIG. 1B, the core barrels 37, 37 are formed such that the distance between them in the width direction X continuously increases from the root 37A toward the tip 37B. This is to make it easier to receive the electric wire 100. The same applies to the coating barrels 39, 39.

[Coated barrel 39, 39]
Next, the coating barrels 39, 39 crimp the insulating coating 103 of the electric wire 100 to fix the insulating coating 103 to the crimp portion 30.
As shown in FIG. 1, the coating barrels 39, 39 have a trapezoidal planar shape. This is an example, and the shape thereof is arbitrary as long as the insulating coating 103 can be pressure-bonded. Although an example in which the pair of coated barrels 39, 39 is provided is shown here, this is also only an example of the present invention. By adjusting the shape and size, the insulating coating 103 can be pressure-bonded by one coating barrel 39. Further, here, an example is shown in which the pair of coated barrels 39, 39 are provided with the positions in the longitudinal direction Y shifted, but this is also only an example of the present invention. It may be provided at the same position in the longitudinal direction Y and pressure-bonded so that one coating barrel 39 is laminated with the other coating barrel 39.

[Crimping procedure]
Next, a procedure for crimping the electric wire 100 to the crimp terminal 1 will be described with reference to FIGS. 3 and 4.
First, as shown in FIG. 3, the electric wire 100 is placed on the crimp terminal 1 at a predetermined position. At this time, the electric wire 100 is placed on the crimp terminal 1 so that the front end 102 of the core wire 101 abuts on the locking surface 34 of the partition 33.
After aligning the front end 102 of the core wire 101 with respect to the partition 33 in the width direction X and the longitudinal direction Y, the electric wire 100 is moved from the upper side to the lower side in the height direction Z, whereby a predetermined position of the crimp terminal 1 is obtained. The electric wire 100 can be placed on the. In addition, by aligning the front end 102 of the core wire 101 with respect to the partition 33 in the width direction X and the height direction Z, the electric wire 100 is moved from the rear to the front in the longitudinal direction Y, whereby the crimp terminal 1 The electric wire 100 can be placed at a predetermined position.

  The work of mounting the electric wire 100 on the crimp terminal 1 can be performed by a machine or manually. In any case, the electric wire 100 may be placed on the crimp terminal 1 so that the front end 102 is separated rearward (B) from the locking surface 34. After the electric wire 100 is placed on the crimp terminal 1, observation is performed through the viewing window 35, and if the core wire 101 is observed, crimping work is performed. If the core wire 101 is not observed, the positional displacement of the core wire 101 is corrected, and then the crimping work is performed. The crimping work is usually performed by a caulking device using a mold. The observation step may be performed after the pressure bonding work.

  When the crimping work is completed, as shown in FIG. 4, the core wire barrels 37, 37 are folded inward in the width direction X, so that the core wire 101 is crimped in the form of a circular cross section. Further, the respective coated barrels 39, 39 are folded so as to follow the outer peripheral surface of the insulating coating 103, so that the insulating coating 103 is crimped in a form having a circular cross section.

[Insertion into the seal member 110]
The crimp terminal 1 to which the electric wire 100 is crimped is inserted into the seal member 110 as shown in FIG. FIG. 5 shows the progress. Although only one seal hole 113 is shown in the main body 111 here, a plurality of seal holes 113 are actually formed as a seal member 110 called a family seal formed in the main body 111. is there. The seal member 110 includes a main body 111, a seal hole 113 that penetrates the front and back of the main body 111, and an annular seal protrusion 115 that projects into the seal hole 113.

To insert the crimp terminal 1 in which the electric wire 100 is crimped into the seal hole 113 of the seal member 110, as shown in FIG. 5A, the crimp terminal 1 is positioned in the seal hole 113, and then the back of the seal hole 113 is inserted. Push it toward.
As shown in FIG. 5B, the crimp terminal 1 advances toward the inner part of the seal hole 113 while interfering with the annular seal protrusion 115 inside the seal hole 113.
As shown in FIG. 5C, when the crimp terminal 1 is pushed in until the insulating coating 103 reaches the seal hole 113, the annular seal protrusion 115 comes into close contact with the outer peripheral surface of the insulating coating 103, and the crimp terminal 1 passes through the seal hole 113. Prevents the intrusion of water into the inside of the seal member 110 in which is disposed.

  In the process of inserting the crimp terminal 1, the crimp terminal 1 interferes with the annular seal protrusion 115. Therefore, this interference may damage the annular seal projection 115. Particularly, when the front end of the core wire 101 projects from the core wire barrels 37, 37 after pressure bonding, the front end of the core wire 101 abuts on the annular seal projection 115. Then, the annular seal protrusion 115 may be damaged. The crimp terminal 1 of the present embodiment is provided with the partition 33, so that the front end of the core wire 101 can be prevented from hitting the annular seal projection 115.

[Operation and effect of crimp terminal 1]
Hereinafter, the operation and effect of this embodiment will be described with reference to FIG.
<Preventing the core wire 101 from separating>
First, as shown in FIG. 6, the locking surface 34 of the partition 33 is located slightly behind (B) the front end 37E of the core barrel 37. Therefore, even if the core wire 101 is placed at the most front (F), the front end 102 of the core wire 101 is placed at the rear (B) of the front end 37E of the core wire barrel 37. That is, the front end 102 of the core wire 101 remains within the range of the area where the core wire barrels 37, 37 are provided and the core wire 101 is crimped. As a result, the core wire 101 is mechanically restrained by the core wire barrels 37, 37 even if the core wires 101 are attempting to separate toward the outside by pressure bonding by the core wire barrels 37, 37.

The partition 33 of the present embodiment is provided on the base 31.
Here, a member similar to the partition 33 can be provided on at least one of the core wire barrels 37, 37. However, as described above, the core barrels 37, 37 are inclined so that the distance between the core barrels 37, 37 becomes wider as the distance from the base 31 increases. Therefore, the core wire barrels 37, 37 cannot be abutted against the front end 102 of the core wire 101 unless the size protruding from the core wires 37, 37 is considerably increased. On the other hand, if it is premised that the partition 33 is formed by cutting and raising, it may not be possible to secure a size enough to abut against the front end 102 of the core wire 101. Therefore, by providing the partition 33 on the base 31 as in the present embodiment, the partition 33 having a necessary protrusion amount can be easily secured, and thus the core wire 101 can be reliably prevented from being loosened.

The partition 33 of the present embodiment is formed by cutting and raising the punched hole 32 in front (F) of the partition 33.
The punching hole 32 is formed in front of the partition 33, but the punching hole is not formed in the rear of the partition 33, and the base 31 is left as it is. Therefore, even if the core wire 101 tends to come apart after the pressure bonding, the base portion 31 and the core wire barrels 37, 37 restrain the core wire 101 in the height direction Z. If the punching hole is formed after the partition 33 (B), the loose core wire 101 will protrude to the outside through the punching hole after the pressure bonding.

<Securing the electrical connection area between the crimp terminal 1 and the core wire 101>
The crimp terminal 1 is provided with the visual recognition window 35 after the partition 33 (B). If the core wire 101 can be confirmed through the viewing window 35 after the electric wire 100 is placed on the base 31 before crimping, it can be confirmed that the electrical contact area between the crimp terminal 1 and the core wire 101 can be secured. In the crimp terminal 1 that has been confirmed, the necessary electrical connection state between the crimp terminal 1 and the core wire 101 is secured.

Although the preferred crimp terminal 1 of the present invention has been described above, the configurations described in the above embodiments can be selected or changed to other configurations without departing from the spirit of the present invention. .
For example, as shown in FIG. 7A, it is assumed that the core wire barrel 37 has a trapezoidal shape. In this case, the partition 33 is configured such that the locking surface 34 is arranged at the front end 37E of the front end 37B of the core barrel 37 or at the rear (B) of the front end 37E. By doing so, after crimping the core wire barrels 37, 37 to the core wire 101, the front end 102 of the core wire 101 remains within the range of the crimped core wire barrels 37, 37.

  Further, as shown in FIG. 7B, the locking surface 34 of the partition 33 can be provided sufficiently rearward (B) from the front end 37E of the core barrel 37. In this way, the front end 102 of the core wire 101 is definitely placed behind (B) the front end 37E, so that the core wire 101 can be more reliably prevented from coming apart.

  Further, as shown in FIG. 7C, the viewing window 35 can be provided on one or both of the core barrels 37, 37. However, when the observation of the viewing window 35 is performed using an optical means instead of the naked eye, the viewing window 35 is preferably provided in the base 31. This is because the core barrels 37, 37 are inclined, so that it may be difficult to visually recognize them by optical means.

DESCRIPTION OF SYMBOLS 1 Crimping terminal 10 Contact part 11 Terminal body 30 Crimping part 31 Base part 32 Punching hole 33 Partition 34 Locking surface 35 Visual window 37 Core wire barrel 37A Root 37B Tip 37E Front end 39 Covering barrel 100 Electric wire 101 Core wire 102 Front end 103 Insulating coating 110 Sealing member 111 Main body 113 Seal hole 115 Annular seal protrusion

Claims (4)

A core barrel that crimps the core of the electric wire,
A coating barrel for crimping the insulating coating of the electric wire, which is provided behind the core wire barrel,
A base for supporting the core barrel and the coating barrel;
A crimp terminal provided with a partition which is provided at the front end of the core wire barrel or rearward of the front end and which stands up from the base.
A window through which the inside can be visually recognized from the outside is provided within the range where the core barrel is provided behind the partition.
The crimp terminal according to claim 1.
The window is provided in the base,
The crimp terminal according to claim 2.
The base is present between the partition and the window,
The crimp terminal according to claim 3.

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