JPH1167287A - Water-proof structure in electric wire connections of earth terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-proof structure in electric wire connections of an earth terminal capable of fitting inexpensively and easily plural electric wires. SOLUTION: The electric wire connections 4 for connecting electric wires W, and an earthing part 3 to be connected vertically relating to the connections 4 are provided in an earth terminal. Electric wire guiding walls 4B for guiding the wire W are folded to be erected in both side edges of the electric wire connections, and electric wire caulking pieces 6 are protruded alternately in the side near to the earth part 3 in the guiding walls 4B. The wire W and the wire connections 4 are fitted into a rubber cap 2, and then filled with a sealant to be solidified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure at a wire connecting portion of a ground terminal.

[0002]

2. Description of the Related Art FIGS. 11 (Japanese Unexamined Patent Application Publication No. 6-84565) and FIG. 12 (Japanese Unexamined Patent Application Publication No. 60-119086) show a wire W extending from a circuit (not shown) requiring a ground. Two types of structures are shown in which the ground terminals 100 and 105 are attached and the connection between the electric wire W and the ground terminals 100 and 105 is waterproofed.

[0003] Of these, a rubber cap 101 is attached to a connection portion between an electric wire W and a ground terminal 100, and a sealing material 1 is placed inside the rubber cap 101.
02 is filled and solidified.

FIG. 11 shows a plurality of electric wires W.
Are mounted in the connector housing 103 on one side, and the ground terminal 105 extends from the connector housing 104 on the other side. And the connector housings 10
3 and 104, the ground terminal 105
A plurality of grounds are connected to one ground terminal 105 while the connection portion between the wire and the electric wire W has a waterproof structure.

[0005]

However, when a plurality of grounds are required, the use of the connector housings 103 and 104 as shown in FIG. 11 requires the manufacture of a mold and terminal fittings. Would be very expensive.

Further, in the method shown in FIG. 12, when a circuit requiring a plurality of grounds is mounted, the number of ground terminals 100 corresponding to the circuit is required, and the mounting operation becomes complicated. On the other hand, in order to avoid this, it is conceivable to attach a plurality of electric wires W to the ground terminal 100 by applying the structure of FIG. 12, but in such a case, the rubber cap 101 and the electric wire W Therefore, a gap is generated in the mounting portion, and leaks when the sealing material 102 is filled, which is not appropriate.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a waterproof structure at a wire connection portion of a ground terminal to which a plurality of wires can be easily attached at a low cost.

[0008]

According to a first aspect of the present invention, there is provided a waterproof structure at a wire connecting portion of a ground terminal, wherein at one end thereof, a core portion exposed at an end of the wire is provided. An electric wire connecting portion for connecting the wire is disposed, and the other end side is provided with a grounding portion.In the ground terminal, the electric wire connecting portion is covered with a bottomed cap together with the core wire portion. It is characterized by being embedded by a sealing material.

According to a second aspect of the present invention, in the first aspect, the ground portion and the wire connection portion extend substantially perpendicular to each other.

A third aspect of the present invention is the second aspect of the present invention, wherein the electric wire connection portion extends in the left-right direction from both side portions of the ground portion.

According to a fourth aspect of the present invention, there is provided an electric vehicle according to any one of the first to third aspects, wherein a wire guide wall is provided on both side edge portions of the wire connection portion along a mounting direction of the plurality of wires. Is provided.

[0012]

According to the first aspect of the present invention, the end of the electric wire is peeled to expose the core wire, and the core wire portion is connected to the electric wire connection portion of the ground terminal. next,
This electric wire connection part is covered with a bottomed cap, and the inside is further filled with a sealing material. This achieves a waterproof structure at the wire connection portion of the ground terminal.

According to the second aspect of the present invention, the ground portion and the electric wire connection portion are substantially perpendicular to each other. For this reason, when the cap is attached to the electric wire connection portion, the tip of the cap abuts on the ground portion so that positioning can be performed, and the insertion depth of the cap becomes constant.

According to the third aspect of the present invention, when the insulated wire is attached to the wire connection portion, any of the left and right directions with respect to the ground portion can be selected. For this reason, the one that is convenient for assembling the ground terminal can be selected.

According to the fourth aspect of the present invention, since the electric wire guide wall guides the plurality of electric wires along the electric wire connection portion, the connectivity between the electric wires and the ground terminal is improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view before the ground terminal 1 and the cap 2 are assembled. A coating WA for insulation is provided around the electric wire W, and the coating WA is peeled off at a tip portion to expose a core wire WB portion. Although not shown, a circuit requiring ground is connected to the other end of the electric wire W.

The ground terminal 1 is formed by bending a conductive metal material into a substantially T-shape. A ground portion 3 is provided at one end, and a wire connection portion 4 is provided at the other end. The grounding portion 3 is formed in a circular shape, and has a mounting hole 3A at the center thereof for mounting to a bolt (not shown). A part of the outer edge of the ground part 3 is connected to the connecting part 5.
Extends from the center of the connecting portion 5, and the wire connecting portion 4 extends in a direction perpendicular to the extending direction of the connecting portion 5. The electric wire connection part 4 includes an electric wire attachment piece 4A and a pair of electric wire guide walls 4B formed by bending both side edges of the electric wire attachment piece 4A. The wire guide wall 4B extends to the side of the wire mounting piece 4A at a slight distance from the connecting portion 5, and is located on the base side (the connecting portion 5) of the wire guide wall 4B.
On the other hand, electric wire caulking pieces 6 are protrudingly provided on the side (closer side). The pair of electric wire caulking pieces 6 are arranged at alternate positions along the length direction of the electric wire guide wall 4B, and caulk the covering WA portion of the electric wire W and crimp to the wire mounting piece 4A side. The core wire WB is connected to the wire connection portion 4 as necessary.
May be soldered.

The cap 2 is integrally formed of an insulating rubber, and has a rectangular cylindrical shape having a bottom at one end. The opening of the cap 2 has such a length that the wire connection part 4 can be inserted and that the entire wire connection part 4 can be covered. The inside of the cap 2 is a space filled with a sealing material 7 (mold resin) for waterproofing.

Next, a structure for assembling the ground terminal 1, the cap 2, and the electric wire W according to the present embodiment will be described. First, a plurality of electric wires W from which the coatings WA of the distal end portions are peeled off are bundled, placed on the upper side of the electric wire attaching piece 4A, and caulked with the electric wire caulking piece 6. At this time, the electric wires W may be soldered in advance as necessary, or the electric wire W and the electric wire connection portion 4 may be soldered.

Next, the electric wire connection part 4 is inserted into the cap 2. At this time, since the wire connecting portion 4 and the connecting portion 5 are substantially perpendicular to each other, the insertion depth of the cap 2 is determined by the tip of the cap 2 abutting on the connecting portion 5. Next, the sealing material 7 is filled in the cap 2. The bottom of the cap 2 is placed downward, and the sealing material 7 is poured into the vicinity of the opening of the cap 2 and solidified. At this time, since the cap 2 has a bottomed shape, the sealing material 7 does not flow out from the lower opening even if the wire connecting portion 4 to which a plurality of wires W are attached is inserted. The waterproof structure at the connection part 4 is completed.

As described above, according to the present embodiment, even when a plurality of electric wires W and the ground terminal 1 are connected, an expensive connector housing does not need to be formed, and the electric wire W can be easily assembled.

The grounding section 3 and the electric wire connecting section 4 are made substantially perpendicular to each other by the connecting section 5. For this reason, when attaching the cap 2 to the electric wire connection portion 4,
Since the leading end of the cap abuts on the connecting portion 5, positioning can be performed, and the insertion depth of the cap 2 becomes constant.

Further, when assembling the electric wire W to the ground terminal 1, the electric wire guide wall 4B guides the plurality of electric wires W along the electric wire connection portion 4, so that the connection between the electric wire W and the ground terminal 1 is performed. The property becomes good.

In addition, since the wire crimping piece 6 for crimping the wire W is provided on the ground terminal 1, the connection strength between the wire W and the ground terminal 1 is enhanced.

In this embodiment, the ground terminal 1 is substantially T
Although it is formed in the shape of a letter, according to the present invention, a part extending to the right side from the part where the connecting part 5 and the wire connecting part 4 are connected may be eliminated to form a substantially L-shape.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment and the first embodiment, the same components are denoted by the same reference numerals, and a part of the description will be omitted.

The difference between this embodiment and the first embodiment is the structure of the ground terminal 10. The ground terminal 10 is formed by bending a conductive metal plate, and includes an electric wire connection portion 11 and a ground portion 13. The wire connection portion 11 is formed in a U-shaped cross section, and includes a bottom portion 11A on which the wire W is placed and a pair of wire guide walls 11B bent from both side edges of the bottom portion 11A. In addition, a part of the wall surface extends in both outward directions from a substantially central position of the wire guide wall 11B. One of the extending portions is a connecting portion 12, and a circular ground portion 13 is formed at the tip of the connecting portion 12 extending to the same width. At the center of the grounding portion 13 is a mounting hole 13 for mounting to a bolt (not shown).
A is provided. In addition, a positioning piece 14 extending at the same width as the connecting portion 12 is protrudingly provided at a position facing the connecting portion 12. The positioning piece 14 contacts the tip of the cap 2 together with the connecting portion 12 when the cap 2 is attached, and positions the cap 2.

In the second embodiment configured as described above, the same functions and effects as those of the first embodiment can be obtained.

Further, in the present embodiment, when the electric wire W is attached to the electric wire connection portion 11, the electric wire W can be attached to the ground portion 13 from any of the left and right directions. For this reason, the mounting hole 13A of the ground part 13 is bolted (not shown).
When assembling, it is possible to select a convenient one in the assembling direction.

<Third Embodiment> Next, a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment and the first embodiment, the same components are denoted by the same reference numerals, and a part of the description will be omitted.

In the present embodiment, the ground terminal 20 is formed into an elongated shape having a uniform width by a conductive metal plate.
One end is provided with a circular ground portion 21 having a mounting hole 21A at the center, and the other end is an electric wire connection portion 22. This electric wire connection part 22 is a core wire WA at the end of the electric wire W.
And are connected by resistance welding.

The cap 23 is integrally formed of insulating rubber and has a cylindrical shape having a bottom at one end.
The diameter of the opening edge of the cap 23 is determined by the electric wire W and the electric wire connection portion 2.
2 is made larger than the diameter of the connected one,
Its length is longer than the length of the exposed core wire WA at the end of the electric wire W. The inside of the cap 23 is filled with a sealing material 7 (mold resin) for waterproofing.

Next, the operation and effect of this embodiment will be described. The wire connecting part 22 connected to the core wire WA exposed at the end of the wire W is inserted into the cap 23. Here, the sealing material 7 is filled and solidified in the cap 23. Then, the ground terminal 20 is connected to the cap 23.
The ground terminal 20 is bent at a desired angle at a position where the ground portion 21 protrudes from the position so that the ground portion 21 is easily used.

As described above, according to the present embodiment, in addition to the same effects as those of the first embodiment, it is possible to provide the earth terminal 20 having a simpler configuration.

In this embodiment, the ground terminal 2
Bending the central portion of O serves as a positioning role when assembling the cap 23, and is convenient when attaching a bolt (not shown) to the attachment hole 21A of the ground portion 21.

The present invention is not limited to the above-described embodiment. For example, the followings are also included in the technical scope of the present invention. (1) The number of electric wires is not limited to a plurality but may be one. (2) If the material of the cap is insulating, it does not depend on rubber.
Synthetic resin may be used. (3) In the first and second embodiments, the ground portion and the wire connection portion need not intersect at right angles, and may be inclined at 30 degrees, 45 degrees, or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment before assembling a ground terminal and a cap.

FIG. 2 is a perspective view when an earth terminal and an electric wire are assembled.

FIG. 3 is a partially cutaway perspective view when assembly is completed.

FIG. 4 is a perspective view of a second embodiment before a ground terminal and a cap are assembled.

FIG. 5 is a perspective view when the ground terminal and the electric wire are assembled.

FIG. 6 is a partially cutaway perspective view when assembly is completed.

FIG. 7 is a perspective view of a third embodiment before assembling a ground terminal and a cap.

FIG. 8 is a partially cutaway perspective view when assembly is completed.

FIG. 9 is a partially broken perspective view when the ground terminal is bent.

FIG. 10 is a partially broken perspective view when the ground terminal is folded back.

FIG. 11 is a side sectional view of a grounding connector in a conventional example.

FIG. 12 is a side sectional view of a ground terminal in a conventional example.

[Explanation of symbols]

 1, 10, 20: ground terminal 2, 23: cap 3, 12, 21: ground part 4, 11, 22: electric wire connection part 4B, 11B: electric wire guide wall 7: sealing material W: electric wire WB: core wire

Claims (4)

[Claims] 1. An earth terminal having one end provided with an electric wire connecting portion for connecting a core portion exposed at an end of the electric wire and the other end provided with an earth portion. A waterproof structure at a wire connection portion of a ground terminal, wherein the connection portion is covered with a bottomed cap together with the core portion, and the inside of the cap is embedded with a sealing material. 2. The waterproof structure at a wire connection portion of a ground terminal according to claim 1, wherein the ground portion and the wire connection portion extend substantially perpendicular to each other. . 3. The waterproof structure at a wire connection portion of a ground terminal according to claim 2, wherein the wire connection portion extends in the left-right direction from both side portions of the ground portion. . 4. An electric wire guide wall according to claim 1, wherein both side edge portions of said electric wire connection portion are provided with electric wire guide walls along a mounting direction of said plurality of electric wires. A waterproof structure at a wire connection portion of a ground terminal.