JP2822295B2 - Insulated wire termination structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing structure of a terminal in which core wires of a plurality of coated electric wires are connected so as to be able to conduct electricity, and more particularly, to a structure for preventing separation of a core wire and waterproofing. Terminal processing structure.

[0002]

2. Description of the Related Art When connecting a plurality of covered electric wires to each other, a method of soldering the core wires together or fixing them by crimping terminals, and as shown in FIG. There is a method of forming a terminal 3 by treating the terminal 2 by ultrasonic welding in a state where the terminals 2 are aligned in the same direction, and integrally fixing the terminal 2 in a conductive manner. However, in the terminal treatment shown in FIG. 10, when one of the electric wires 1a is pulled in the direction opposite to the alignment direction as shown in the drawing, the electric wire 1a is easily peeled off, and furthermore, there is no waterproofing and insulation function at all.

[0003] In order to solve such a problem, various terminal processing structures have been conventionally proposed. That is, FIG.
Is disclosed as a "structure of a wire connection portion" by Japanese Utility Model Application Laid-Open No. Hei 4-24266, and a terminal 3 is formed by thermocompression bonding core wires 2 of a plurality of covered wires 1. , In the terminal housing room 5 of the insulating housing 4. The terminal processing structure shown in FIG.
The terminal 3 is formed by fixing the core wires 2 of a plurality of insulated wires 1 by crimping terminals 6, accommodating the terminal 3 in an insulating housing 4, and removing the terminal 3 by a protrusion 7. It is configured to perform prevention. The terminal processing structure shown in FIG.
No. 3-108193,
A terminal 3 is formed by fixing the core wires 2 of the plurality of insulated wires 1 with a crimping terminal 6 or the like, housed in the insulating housing 4, filled with the sealing material 8, and further bound by the binding components 9 so as not to be removed. Structure. The terminal processing structure shown in FIG. 14 is disclosed in Japanese Utility Model Laid-Open No. Hei 4-2459 as an example of a conventional branch box. That is, the A-phase core wire 1a of each coated electric wire 1 is connected by the copper tube sleeve 11 and fitted with the insulating cap 12, while the B-phase core wire 1b
Are connected by a copper tube sleeve 13 and fitted with an insulating cap 14. Then, the coated electric wires 1 are aligned with the opening side of the case 15, and the ends of the coated electric wires 1, in other words, the portions fixed by the copper tube sleeves 11 and 13 are fixed to the case 1.
5 are filled with a sealing agent 16.

[0004]

However, the terminal treatment structure shown in FIG. 11 can prevent the insulated wire 1 from being pulled in the opposite direction, but does not have a waterproof effect. However, it is difficult to fill the space between the coated electric wires 1 and the waterproof effect is insufficient. Therefore, when it is applied to a device having a severe use environment such as an automobile, it lacks safety.
In the terminal processing structure shown in FIG. 12, if the core wire 2 is temporarily welded and connected, the core wire 2 cannot be locked to the projection 7, and the crimp terminal 6 is required to prevent the core wire 2 from coming off. Increase and contribute to high cost. In addition, similarly to the above, there is no waterproof effect, and the application range is limited. FIG.
In the terminal processing structure shown in (1), since the distal end portion is small, if the coated electric wire 1 is pulled in the backward direction, the distal end portion comes out of the insulating housing 4. In addition, it is difficult to perform a waterproofing treatment on water that penetrates and infiltrates the covered electric wire 1. The terminal processing structure shown in FIG. 14 has a large shape because the covered electric wires 1 are aligned, and it is difficult to take up space when applied to a device having a limited space such as an automobile. An object of the present invention is to provide a terminal treatment structure of a covered electric wire which is excellent in all of peeling, water resistance, and insulation properties of the covered electric wire, has a simple structure, and is easy to assemble.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a terminal in which a plurality of insulated wires are formed by connecting the core wires of the plurality of insulated wires so as to be able to conduct electricity into a fitting hole formed in a longitudinal inner member. While inserting the covered electric wire into a tubular insulating cap having one end closed in a state of being pulled out along the side surface of the inner member, and inserting the plurality of covered electric wires and the inner member in the insulating cap. This is achieved by a structure for terminating a covered electric wire, which is integrally solidified in a watertight state by a sealing material.

[0006]

In other words, the core wires of a plurality of coated electric wires are welded so as to be able to conduct electricity, are fitted in fitting holes formed in the longitudinal inner member, for example, in the axial direction, and are inserted into the insulating cap. It is integrated in a watertight state by a sealing material. Therefore, the core wire does not peel off from the terminal even when a pulling force in the direction of pull-out acts on each of the coated electric wires, and is integrated with the inner member in a water-tight manner in the insulating cap, so that the waterproof and insulating properties are excellent. It becomes something.

Next, a first embodiment of the present invention will be described with reference to FIGS.
An embodiment will be described. 1 is an exploded perspective view showing a terminal processing structure, FIGS. 2 to 4 are perspective views of members showing an assembled state, FIG. 5 is a perspective view showing an appearance in an assembled state, and FIG. 6 is a cross section showing an internal structure in an assembled state. FIG. 7 is a cross-sectional view showing the dimension setting of each member. In addition, what was demonstrated with reference to FIG. 10 is used for the core wire connection of each covered electric wire.

[0010] The core wires 2 of the covered electric wires 1 are connected to each other and fixed by ultrasonic welding or the like to form a terminal 3 which can be energized. The inner member 21 is integrally formed in a cylindrical shape with a synthetic resin or the like, and has a fitting hole 22 for fitting the terminal 3 in the axial direction of the center portion. The ribs 24 are formed alternately. Further, a winding portion 25 for winding the covered electric wire 1 is formed at a tip end of the inner member 21, and a width W thereof is set slightly larger than a width w of a sealing material 26 described later.

The insulating cap 31 is made of synthetic resin and integrally molded into a cylindrical shape with one end closed, and collectively accommodates the terminal 3 and the inner member 21. On the opening end side of the insulating cap 31, a groove 32 for projecting the lock member 23 and a locking portion 33 for locking the lock member 23 to prevent the lock member 23 from coming off are provided.

Next, the terminal processing structure will be described together with its assembling work. First, the winding portion 2 of the inner member 21 is formed.
5 is wound around the sealing material 26 as shown in FIG. 2, and then the terminal 3 is fitted into the fitting hole 22 as shown by the arrow A in FIG. Then, each covered electric wire 1 is arranged along the side surface of the inner member 21, and then the second sealing material 26a is wound from above the covered electric wire 1 as shown in FIG. As a result,
Each covered electric wire 1 is wound around the side surface of the inner member 21 while being sandwiched between the first sealing material 26 and the second sealing material 26a. In addition, the sealing material 2
Reference numerals 6 and 26a denote self-fusing agents such as butyl rubber formed in a strip shape, and both may be of the same material. However, in this embodiment, different reference numerals are used to facilitate understanding of the structure. doing.

After the inner member 21 and the insulated wire 1 are integrated as described above, they are housed in the insulating cap 31 as shown in FIG. At this time, the lock member 23 is
2 to prevent the inner member 21 and the covered electric wire 1 from coming off. The rib 24
6, is pressed against the inner wall surface of the inner member 21 to prevent rattling of the inner member 21.

What should be noted in the above structure is that the covered electric wire 1 is sandwiched between a first sealing material 26 and a second sealing material 26a as shown in FIG. , 26a are self-fusing agents, so that not only the gaps between the covered wires 1 but also the gaps between the inner wall surface of the cap 21 and the surface of the inner member 21 are completely sealed. Therefore, according to the terminal treatment structure shown in this embodiment, the insulated wire 1 is prevented from coming off by the action of the lock member 23 provided on the inner member 21, and waterproofing is performed by the first and second sealing materials 26 and 26 a. It is performed by Also,
The terminal 3 is completely insulated by the inner member 21 and the insulating cap 21, and peeling of each of the coated electric wires 1 from the terminal 3 can be completely prevented by being fitted into the fitting hole 22 of the inner member 21. Therefore, the terminal processing structure has excellent security and high reliability.

The dimensions of each member will be described with reference to FIG. 7. The outer diameter of the inner member 21 is a, the inner diameter of the insulating cap 31 is b, the diameter of each electric wire 1 is c, each sealing material 26, Assuming that the thickness of 26a is d, (ba) / 2 <
(2d + c) is set. As a result, the waterproof treatment is performed by the sealing material 26, 26a by the tip of the inner member 21, in other words, the winding part 25 and the insulating cap 31.
Is performed as described above with the inner wall surface.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment is characterized in that a liquid sealing material is used instead of the band-shaped sealing materials 26 and 26a. That is, the fitting structure of the inner member 21 and the terminal 3, the structure of the insulating cap 31, and the like are as described in the first embodiment. However, the first and second
The sealing material 26, 26a is not used, and a required amount of sealing material 35 is provided in the insulating cap 31 as shown in FIG.
Fill beforehand. Next, the fitting hole 22 of the inner member 21
Terminal 3 is inserted into the inner member 21.
While being pulled out along the side surface of, is inserted into the insulating cap 31 from the tip.

By solidifying the sealing material 35 in this state, a terminal processing structure as shown in FIG. 9 is completed.
In the present embodiment, the filling amount of the sealing material 35 is set according to the volume of the inner member 21 inserted into the insulating cap 31. Therefore, by inserting the inner member 21 into the insulating cap 31, the sealing material 35 is formed.
Spreads inside the insulating cap 31. Since the sealing material 35 is solidified while penetrating between the insulated wires 1, the insulating cap 31, the inner member 2
1 is also integrated in a watertight state. Therefore, the insulation of the terminal 3,
The improvement of the waterproof property etc. is achieved at once, and the locking member 2
The action of 3 prevents the covered electric wire 1 and the inner member 21 from coming off.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the terminal may be formed by soldering or the like.

[0017]

As described above, according to the terminal treatment structure of the coated electric wire according to the present invention, the terminal formed by welding the core wires of the plural coated electric wires is formed along the axial direction of the longitudinal inner member. It fits into the fitting hole formed along with it, and is inserted into a cylindrical insulating cap with one end closed together with the inner member so that the plurality of covered electric wires can be drawn out so as to be connectable to the outside. It is integrated in a watertight manner. Therefore, even if a force for pulling a plurality of covered electric wires is applied, the individual covered electric wires do not come off due to the action of the inner member and the fitting hole, and the core wire does not peel off from the terminal, and the action of the sealing material allows the terminal. It becomes watertight, has excellent insulation and safety, and is compact and easy to use.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of each member constituting a terminal processing structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an inner member.

FIG. 3 is a perspective view showing an assembling process of the terminal processing structure.

FIG. 4 is a perspective view showing an assembling process of the terminal processing structure.

FIG. 5 is a perspective view showing an appearance of a terminal processing structure.

FIG. 6 is a sectional view showing the internal structure of the terminal processing structure.

FIG. 7 is a cross-sectional view illustrating a dimension setting of each member constituting the terminal processing structure.

FIG. 8 is a sectional view of an insulating cap according to a second embodiment of the present invention.

FIG. 9 is a sectional view showing an internal structure of the terminal processing structure.

FIG. 10 is a perspective view showing a first example of a conventional terminal processing structure.

FIG. 11 is a perspective view showing a second example of a conventional terminal processing structure.

FIG. 12 is a perspective view showing a third example of a conventional terminal processing structure.

FIG. 13 is a perspective view showing a fourth example of a conventional terminal processing structure.

FIG. 14 is a perspective view showing a fifth example of a conventional terminal processing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated electric wire 2 Core wire 3 Terminal 21 Inner member 22 Fitting hole 23 Lock member 24 Rib 25 Winding part 26, 26a, 35 Sealing material 31 Insulating cap 32 Groove part 33 Lock part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/22 H01R 4/70 H01R 43/00 H02G 1/14

Claims (1)

(57) [Claims] An end formed by electrically connecting core wires of a plurality of covered electric wires is fitted into a fitting hole formed in a longitudinal inner member, and the plurality of covered electric wires are connected to the inner wire. It is inserted into a cylindrical insulating cap having one end closed in a state where it is pulled out along the side surface of the member, and the coated electric wire and the inner member are solidified integrally in a watertight state by a sealing material in the insulating cap. Characteristic terminal treatment structure of coated electric wire.