JPH11329529A - Terminal part structure of cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the terminal part structure of a cable capable of ensuring the electrical insulation of the connecting part of a flat cable to a connecting terminal with a viscous material, and confirming the filling state of the viscous material. SOLUTION: Covers 11, 12 have on their insides a filling chamber 26 for housing butyl rubber 16 in the surroundings of a connecting part 15a of a flat cable 13 to a connecting terminal 15, a cavity chamber 27 communicating with the filling chamber 26, a flow preventing wall 29 for preventing the flow out of the butyl rubber 16 to the front end surface 23, projections 30, 31 for making the flow of the butyl rubber 16 uniform, and a flow regulating wall 32 projecting toward the flat cable 13, and regulating the flow of the butyl rubber 16 to the cavity chamber 27. Because the butyl rubber 16 is sufficiently filled in the filling chamber 26, then flows to the cavity chamber 27, the butyl rubber 16 in the cavity chamber 27 is visually confirmed from a recess 33, and the electrical insulation of the connecting part 15a is judged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting portion between a cable and a connecting terminal, wherein an electrically insulating viscous material is applied to a connecting portion between the cable and the connecting terminal, and the viscous material is compressed by a two-piece cover. The present invention relates to a structure of a terminal portion of a cable for securing electrical insulation of the cable.

[0002]

2. Description of the Related Art In a conventional cable terminal structure, for example, as shown in FIGS.
The connection portion 1a of the connection terminal 1 is the conductor 2 of the flat cable 2.
are connected to each other by welding or the like, and a viscous body 3 such as butyl rubber having electrical insulation is applied to the connecting portion 1a and the conductor 2a.
There is one that fits each other to ensure electrical insulation around the connection portion 1a and the conductor 2a.

The covers 4 and 5 are provided with front end faces 4a and 5a and rear end faces 4b and 5b, respectively.
Filling chambers 4c and 5c are provided. Also,
Since the front end surfaces 4a, 5a of the covers 4, 5 are often used as sealing surfaces, the inner surfaces of the covers 4, 5 are fitted to the insulating portions 1b of the connection terminals 1 to form the front end surfaces 4a of the viscous body 3. ,
Outflow prevention walls 4d, 5d for preventing outflow to the 5a side are protruded.

[0004]

However, in the above-mentioned conventional example, when the viscous material 3 is excessively applied to the connection portion 1a of the connection terminal 1 and the conductor 2a of the flat cable 2,
When the covers 4 and 5 are joined together, the viscous body 3 flows out of the front end surfaces 4a and 5a beyond the outflow prevention walls 4d and 5d,
There is a problem that it flows out from the rear end surfaces 4b and 5b. On the other hand, the viscous material 3
If the amount is small, the viscous body 3 may not be completely compressed by the covers 4 and 5 and may not completely cover the periphery of the connection portion 1a. If water or the like flows in, the electric insulation may be impaired. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to secure the electrical insulation of a connecting portion between a flat cable and a connection terminal by a viscous body, and to check a filling state of the viscous body at a terminal end structure of the cable. Is to provide.

[0006]

According to a first aspect of the present invention, there is provided a cable terminal structure for applying a viscous material having electrical insulation to a connection portion between a cable and a connection terminal.
In a terminal structure of a cable for compressing the viscous body by a two-piece cover from both surfaces of the connection part and attaching the viscous body around the connection part, the cover is filled with the viscous body. And a cavity that communicates with the filling chamber and accommodates the viscous body that overflows from the filling chamber, and that the cover includes a confirmation unit that can confirm the viscous body in the cavity. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS.

FIG. 1 is a longitudinal sectional view of an embodiment showing the upper cover 11 and the lower cover 12 in a sectional view. FIG. 2 is a transverse sectional view taken along the line A--A in FIG. The conductors 13a are arranged in a plane and are protected by a coating 13b made of a synthetic resin material. A connection portion 15a of a connection terminal 15 held by a holder 14 made of a synthetic resin material is connected to the conductor 13a of such a flat cable 13 by welding or the like. Then, the connection portion 1 between the conductor 13a of the flat cable 13 and the connection terminal 15
An electrically insulating butyl rubber 16 is applied around the periphery of the upper cover 1a.
1 and a lower cover 12 are covered.

FIG. 3 shows the upper cover 11 and the flat cable 1.
FIG. 4 is a plan view of the holder 14 with the butyl rubber 16 omitted, and the holder 14 has a large-diameter portion 14 a located outside the upper and lower covers 11 and 12, an intermediate portion 14 b contacting the covers 11 and 12, and a cover. Small diameter part 1 located inside 11, 12
4c, and a step 14d is provided between the intermediate portion 14b and the small diameter portion 14c. The holder 14 has a plurality of insertion holes 14e through which engagement projections described later of the upper cover 11 are inserted.

The covers 11 and 12 are formed in a two-piece shape, and are substantially symmetrical with respect to the joining surface except for a plurality of engaging projections 21 and engaging holes 22 for connecting them. The covers 11, 12 have a front end face 23 and a rear end face 24. On the inner faces of the covers 11, 12, a front part 25 having a front end face 23 and abutting against the intermediate part 14 b of the holder 14, A filling chamber 26 for filling the butyl rubber 16 around the connection portion 15a of the conductor 13a and the connection terminal 15
And a cavity chamber 27 for containing an excess of the butyl rubber 16,
Coating 13b of flat cable 13 having rear end face 24
And a rear portion 28 that is in contact with the front end face 23 is sequentially provided from the front end face 23 side.

On the inner surface of the front portion 25 of the covers 11, 12, an outflow preventing wall 29 for preventing the butyl rubber 16 from flowing out to the front end surface 23 abuts on the small diameter portion 14c and the step portion 14d of the holder 14. It is protruded as follows. On the inner surface of the filling chamber 26 of the covers 11 and 12, a central protruding part 30 and two protruding parts 31 projecting into the filling chamber 26 and uniforming the outflow amount of the butyl rubber 16 are formed.

Further, on the inner surface of the covers 11 and 12 between the filling chamber 26 and the hollow chamber 27, a hollow chamber 27 of the butyl rubber 16 is provided.
A flow restricting wall 32 for restricting the flow to the flat cable 13 is provided so as to approach the flat cable 13. The outer surfaces of the hollow chambers 27 of the covers 11 and 12 are covered with the covers 11 and 1.
2, a concave portion 33 is formed for visually checking the presence or absence of the normally black butyl rubber 16 by increasing the transparency.

When forming the terminal portion of the flat cable 13, the connection portion 15a of the connection terminal 15 is connected to the conductor 13a of the flat cable 13 by welding or the like as shown in FIG. A butyl rubber 16 is applied around 15a. The amount of the butyl rubber 16 is such that the butyl rubber 16 completely fills the filling chamber 26 when the covers 11 and 12 are put together, and then flows out from between the flat cable 13 and the flow regulating wall 32 to about the middle of the cavity chamber 27. It is preferable that

Next, as shown in FIG. 5, the engaging projections 21 of the upper cover 11 are inserted through the insertion holes 14e of the holder 14, and are pressed into the engagement holes 22 of the lower cover 12.
The covers 11 and 12 are brought closer to each other. As a result, the butyl rubber 16 is prevented from flowing forward by the outflow preventing wall 29, is prevented from flowing out into the cavity 27 by the flow rate regulating wall 32, and fills the filling chamber 26 while being made uniform by the projections 30 and 31. .

When the covers 11 and 12 are finally brought together and pressed, the butyl rubber 16 enters the filling chamber 26 while the flow rate of the butyl rubber 16 into the cavity 27 is regulated by the flat cable 13 and the flow regulating wall 32. Compressed. When the amount of the butyl rubber 16 is sufficiently filled between the filling chambers and is larger than that, as shown in FIG.
Flows out into the cavity 27 through the flow regulating wall 32.

If the amount of the butyl rubber 16 is too small, the butyl rubber 16 hardly flows out into the cavity 27 as shown in FIG. 16 may not be covered. This can be confirmed by visually checking the butyl rubber 16 from the concave portions 33 of the covers 11 and 12.

In the embodiment, the butyl rubber 16 is confirmed through the concave portions 33 of the covers 11 and 12.
If both or one of the covers 11 and 12 is transparent or translucent, the butyl rubber 16 in the cavity 27 can be confirmed without providing the recess 33.

[0018]

As described above, in the terminal structure of the cable according to the present invention, the cover is provided with a hollow chamber communicating with the filling chamber, and the filling chamber is filled with a viscous material, and the viscous material is compressed by the cover. At this time, by checking whether the viscous material has flowed into the cavity, it is possible to determine whether the electrical insulation of the connection portion is good.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment.

FIG. 2 is a transverse sectional view taken along the line AA of FIG.

FIG. 3 is a plan view excluding an upper cover, a flat cable, and butyl rubber.

FIG. 4 is an explanatory view of assembly.

FIG. 5 is an explanatory view of the assembly.

FIG. 6 is an explanatory diagram of the operation when the amount of butyl rubber is too small.

FIG. 7 is a longitudinal sectional view of a conventional example.

FIG. 8 is a cross-sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upper cover 12 Lower cover 13 Flat cable 13a Conductor 15 Connection terminal 16 Butyl rubber 26 Filling room 27 Cavity room 29 Outflow prevention wall 30, 31 Projection 32 Flow control wall 33 Concave

Continued on the front page (72) Inventor Yukifumi Machida 1-8-1, Kotake-cho, Nerima-ku, Tokyo Ryosei Denso Co., Ltd.

Claims (5)

[Claims] 1. A viscous body having electrical insulation is applied to a connection portion between a cable and a connection terminal, and the viscous body is compressed by a two-piece cover from both surfaces of the connection portion. In the terminal structure of the cable for attaching the viscous body, the cover is provided with a filling chamber for filling the viscous body and a cavity chamber communicating with the filling chamber and containing the viscous body overflowing from the filling chamber, A terminal structure of a cable, wherein a check means for checking the viscous body in the cavity is provided on the cover. 2. The cable terminal structure according to claim 1, wherein a regulating wall for regulating an outflow amount of the viscous body is provided between the filling chamber and the cavity chamber. 3. The cable terminal structure according to claim 1, wherein said confirmation means is a thin-walled part provided in the cavity so as to be transparent. 4. The cable terminal structure according to claim 1, wherein said cover is transparent or translucent for said confirmation means. 5. The viscous material is butyl rubber.
The terminal structure of the cable according to 1.