JPS5849585Y2 - insulation cover - Google Patents

Description

[Detailed Description of the Invention] The present invention is an improved insulating cover for covering connection portions of various electrical components to which lead wires are connected.

First, prior to explaining the present invention, a known insulating cover and its problems will be briefly described with reference to FIG.

In the figure, 1 is, for example, a power switch, and 2 is its main body (
3 is a lead wire (parallel wire) connected to the terminal 2' of the switch; 4 is an insulating cover made of a rubber molded product; The insulating cover 4 is provided with a sleeve 6 through which the lead wire 3 is inserted and pulled out, and when the insulating cover 4 is to be installed as a covering around the wire connection portion of the switch 1, that is, around the terminal side of the main body 2, it is provided with a sleeve 6 that is inserted into the sleeve 6 in advance. Each core wire of the lead wire 3 is connected to each terminal 2', and then the insulating cover 4 is connected.
The switch main body 2 is fitted into the cover part 5 by shifting it in the direction of the arrow a, and it is a matter of course that the insulating cover 4 is separated in the direction indicated by the arrow as shown in the figure when connecting the core wires.

By the way, the functions required of such an insulating cover 4 are that after installation, it should tightly fit around the switch body 20 and not easily come off, and that it should be able to firmly hold (clamp) the base of the lead wire 3 to a certain degree. However, as a practical matter, it is almost impossible to require conventional insulating covers to have such functions.

In other words, in the example shown, the outer dimension of the switch body 2 is A1, the inner dimension of the cover part 5 is A', the outer and inner dimensions of the lead wire 3 are B,
If the inner hole dimension of the sleeve 6 is B', then A>A',
The above-mentioned effect cannot be achieved unless the dimensions are set in the relationship B>B'. However, if the dimensions are set in this way, the insulating cover 4 in the state shown in the figure can be moved in the direction of arrow a.
This is because it would be very difficult to fit the switch body 2 into the cover part 5 by shifting it in the direction, and would therefore cause considerable trouble in assembling parts of this type.

The present invention has been made in view of the above points, and is intended to propose a novel and rational insulating cover to replace the conventional one.

Hereinafter, specific examples of the present invention will be explained with reference to FIGS. 2 to 4.

FIGS. 2A and 2B are perspective views for explaining the insulating cover of the present invention, in which the insulating cover 14 is made of a molded rubber material as before, and FIG. 2A shows the state when molded.

That is, in the figure, 15 indicates a part of the cover that covers the electrical parts mentioned above, such as the connection part side of the switch body, 16 indicates a closing plate on one side, and a rib 15 is provided around the opening of the cover part 15.
′ (filling) is formed.

Further, 17 is a long sleeve that protrudes from the center of the inner surface of the closing plate 16 into the cover part 15, and the inner hole thereof communicates with the outer surface of the closing plate 16 as a lead wire insertion hole 18.
The diameter of the hole in the sleeve is such that a lead wire (this is a general term for cords including parallel electric wires, etc.) to be inserted can be passed through with sufficient margin.

A plurality of clamp claw pieces 19 are provided on the outer surface of the closing plate 16 surrounding the insertion hole 18, and these claw pieces 19 are separated into so-called chuck claw shapes as shown in the figure. By bending the individual claws inwardly by some means, the lead wire passed through the insertion hole 18 can be clamped fairly strongly at the tip of each claw.

In the present invention, for example, when the insulating cover 14 is to be attached to the above-mentioned electrical components, etc., the cover part 15 is turned over to the outer surface of the closing plate 16 as shown by the arrow, and the inner and outer surfaces are reversed. This is done to utilize the stress between the inverted cover portion 15 and the closing plate 16.

Figure B shows the reversed state, and the cover part 1 in this state
5 has a concave circumferential surface to generate an inward contraction force, and the closing plate 16 is slightly curved inward (see FIG. 3).

Therefore, the plurality of claw pieces 19 surrounding the insertion hole 8 are mutually closed inwardly, and a contraction force is also generated on the rib 15' of the cover part 15.

FIG. 3 is a longitudinal sectional side view of the main part showing the state in which the insulating cover 14 is attached to some kind of electrical component.

In the figure, 10 is a switch with a volume, 11 is a switch body thereof, 12 is a volume main body, 12' is an adjustment shaft, and a lead wire 3 is connected to a terminal 21 protruding from the end surface of the switch body 11.

Therefore, the procedure for attaching the insulating cover 14 to the connection side of the switch 10, that is, around the switch body 11 as shown in the figure, is to first attach the insulating cover 14 to the sleeve as it was in its molded state (FIG. 2A). Lead wire 3 from the insertion hole 18 of 17
to the outer surface side of the closing plate 16, that is, each clamp claw piece 19
Pull it out from the inside of the core wire and connect each core wire and each terminal 2' at the free end.
The insulating cover 14 can be freely positioned with respect to the switch body 11 before the insulating cover 14 is connected to the switch body 11, and the cover part 15 shown by the imaginary line is turned over in the direction of the arrow to obtain the state shown in FIG. 2B. Therefore, the cover portion 15 is reversed by appropriately selecting the corresponding positions on both sides.

As a result, as described above, the insulating cover 14 closes each of its claws 19 to clamp the base of the lead wire 3, and the inner peripheral surface of the cover portion 15 on the opening side closely surrounds the switch body 11. In particular, the rib 15' exerts a tightening effect.

It goes without saying that the dimensions of each part of the insulating cover 14 are set in advance according to the type of component to be mounted.

Figures 4A and 4B are longitudinal sectional views showing an embodiment of the present invention;
The same reference numerals are given to parts corresponding to those in the drawings, and redundant explanations are omitted, but in short, this example is intended to make the lead wire holding by the clamping claw pieces 19 more reliable, and each claw piece 19 Protrusions 19' are formed on the outer surface of the road edge, and
Suppression pieces 20 corresponding to the number of claw pieces 19 are provided radially on the outer peripheral surface of the cover part 15 in the molded state (Figure A), and when the cover part 15 is turned over as shown in Figure B, each claw piece In addition to the original closing action of the cover part 19, the suppressing pieces 20 on the inner surface of the cover part 15 are brought into contact with the protrusions 19' on one side of the claws, and together they increase the holding force against the lead wire. The coating method for the parts to be mounted is similar to the previous example.

As described above, according to the present invention, most of the problems observed in the conventional insulating cover mentioned at the beginning can be improved,
In particular, a part of the cover is turned over to the opposite side of the closing plate and placed over the outside of the electrical components, etc., and the stress of the entire cover due to this turning over closes the clamping claw pieces around the lead insertion hole.
The pressing piece presses this claw piece from the outer circumferential side, and the claw piece bends in cooperation with the suppressing piece, increasing the closing force and holding the lead wire tightly, ensuring that it adheres to electrical components etc. It can be maintained, and its practical effects are significant.

Note that the present invention can be applied not only to insulating covers for electrical parts, etc., but also to clamping tools for two other various members.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining a conventional insulating cover, Fig. 2 is a perspective view for explaining an insulating cover according to the present invention, and Fig. 3 is a diagram for explaining a conventional insulating cover.
The same figure is a longitudinal sectional side view of the main part showing a state in which the insulating cover is attached to an electrical component, and FIG. 4 is a longitudinal sectional view showing one embodiment of the insulating cover according to the present invention. In the figure, 3 is a lead wire, 11 is a switch body, 14 is the whole insulating cover, 15 is a part of the cover, 16 is a closing plate,
17 is a sleeve, 18 is a lead wire insertion hole, 19 is a clamping claw piece, and 20 is a suppressing piece.

Claims (1)

[Scope of utility model registration request] In an insulating cover made of a soft elastic material that covers the connection part side of an electrical component, etc., to which a lead wire is connected and pulled out,
A lead wire insertion hole is formed in the approximate center of the closing plate that forms one side of the cover, and a plurality of clamp claw pieces are provided on the outer surface of the closing plate surrounding the insertion hole, and the above-mentioned A suppression piece corresponding to the claw piece is provided on the outer circumferential surface of a part of the cover, and when the cover is attached to the electrical component, etc., the cover part is turned over to face the other side of the blocking plate. When the part of the cover is turned over, the plurality of claw pieces are bent inwardly by the stress of the cover part and the closing plate, and the claw pieces are bent inwardly by the stress of the cover part and the closing plate. The insulating cover is configured to be pressed from the outer circumferential side by the insulating cover, and the lead wire in the insertion hole is held tightly by cooperation of the claw piece and the suppressing piece.