ANTI-TEAR-OFF GRIP

Abstract

The variant consists of an overmolded plug with a lever 6 reinforced by an insert 7, articulated on the plug body by a flexible blade 5 carrying the conductive wires. It is designed to transmit the pull exerted on the wire 11 to a plunger 8 in order to disconnect the plug from the base.

Description

The devices described below constitute addenda to patent application no. 89.00419. These variants, illustrated by figures 1 and 2, represent plugs whose disconnection is achieved by simply pulling on the wire. These sheets are designed to be manufactured by overmolding performed in a single operation. The body (i) includes the usual pins (2) and pin housing (3). The conductors (4) are aligned side by side in the blade (5) located approximately directly above the pins and which has some flexibility to allow possibly a slight longitudinal movement of the lever-forming part (6). In another version -fig. 2- in order to compensate for the longitudinal displacement of the pivot axis of the pusher on the lever1 displacement which is substantially equivalent to the deflection -fig. 4- of the arc of the circle centered at C -fig. 4-, the pusher will be designed so that it can move freely in its channel. For this purpose, the pusher has inclined faces (1) -fig. 5- which allow the axis (C - D) -fig. 5- to move in a plane which is perpendicular to it. The channel for the pusher will therefore preferably have a rectangular cross-section. This part is reinforced by a stiffening insert (7) designed to stiffen it. The plunger preferably has pivoting bulges (9) which fit into the wings (10) of the lever (6). It can also be fixed to it by an axis occupying the same position. We see that by pulling on the cord (11) the action of pulling out the pins will be done by the traction of the blade (5) on the body, and by pressure on the base by means of the plunger (8). The force required to pull the base from its support will therefore be only a fraction of the usual force. It can be set between a quarter and a sixth of the latter, while maintaining the usual dimensions for measurement. We can see that the manufacture of the mold will not present any particular difficulties compared to those of an equivalent technology takeover, with the exception, however, of the drawer necessary for the formation of the pusher circulation channel. The diver, inserted into its channel by the lower part of the body, will be fixed by simple fitting into the wings of the lever, a sufficient fixing since it is not subjected to any pulling force. Figure 2 represents the same socket as Figure 1 but, to meet certain constraints of not accidentally pulling out the plug used on very mobile devices, vacuum cleaners for example, the lever (60) is bent and designed as a "bell return", The reinforcing insert (70) is therefore also bent. The sheathing (120) of the cable (110) places it in line with the flexible blade (50). We can therefore see that pulling on the wire in the direction of the pins will encounter the same resistance as that of an ordinary plug. On the other hand, by pulling on the wire in the direction indicated by the arrow (13), that is to say perpendicular to the pins, the effect of the lever (6) on the push button will cause the plug to be pulled out. To compensate for the fact that a base located close to the ground makes it difficult to pull on the wire downwards, the sheath (120) -fig. 2- of the wire will have sufficient dimensions so that pressure (14) can be exerted, possibly with the foot, in order to pull the grip out. To make the execution of the mold easier, the wings (10) -fig. 2 of the lever will preferably be made in the manner detailed in figure 3. The wings of the stiffening insert (1) -fig. 3- will be pierced with circular orifices (2) -fig. 3- facing each other, with a diameter substantially equal to that of the head (3) -fig. 3- of the pusher. The branches of the insert, folded into an inverted U, will exhibit some transverse flexibility. The plastic material covering the insert has a certain elasticity, so we see that by forcing the plunger head into the open part of the U, the half-ball joints or lugs (4) -fig. 3- forming the ends of the plunger head will force the plastic material to deform elastically-(S) fig. 3-. The snap-in will therefore take place without the need to create internal cavities in the U of the lever, which would complicate the making of the mold. In a preferred embodiment, the stiffening insert will comprise a semi-cylindrical portion (1) - Fig. 6 - supplemented by tabs (2) - Fig. 6 - designed to grip the cord, and pre-cut fins (3) - Fig. 6 - which, when inserted perpendicularly to the fins of the insert, will facilitate the positioning and securing of the conductors side by side. It goes without saying that if the lever is not angled, portion (1) - Fig. 6 - will be substantially in line with the inverted U-shaped profile.

Claims

DEMANDS 1 / Device according to claim 1 of patent application No. 8900419 characterized in that a lever (6) -fig. 1-, optionally reinforced by an insert (7) -fig. 1-, bearing on the base or socket fixed by means of a pusher passing through the body of the plug, disconnects it by transmitting via a flexible blade (5) -fig. 1- The force exerted by traction on the conductor (11) -fig. 1-. 2 / Device according to the present claim 1 characterized in that the conductors are preferably included side by side in the flexible blade. 3 / Device according to claims 1 and 2 characterized in that the flexible blade is sufficiently long and flexible so that the longitudinal displacement of the lever can compensate for the displacements induced by the linearity of the movement of the articulation of the pusher and the lever, during the tilting of the latter. 4 / Device according to claim 1 characterized in that the body of the plug, the flexible blade, the lever and the sheath are manufactured by overmolding in a single operation. 5 / Device according to claim 1 characterized in that the lever (6) can be straight (fig. 1), or bent (fig. 2) at an substantially right angle. 6 / Device according to claims 1 and 5 characterized in that the lever is reinforced by an insert having preferably in its area of ​​force an inverted U profile, and exhibiting a certain transverse flexibility. 7 / Device according to claim 1 characterized in that the pusher (8) is articulated on the lever (6) by a pivot axis transverse to the lever, materialized by lugs (9) fitting into the appropriate cavities of the lever or any other pivoting system and a clearance sufficient for the head of the pusher to rest on the bottom of the cavity of the lever. 8 / Device according to claims 1, 6 and 7 characterized in that the preferably metallic insert has facing circular recesses on its wings intended to receive the lugs or half-ball joints of the pusher head materializing the axis of rotation of the latter. 9 / Device according to claim 1 characterized in that the head of the pusher preferably has no transverse dimension greater than that of the body of the pusher so as to be able to be introduced into the channel of the pusher. 10 / Device according to claims 1 and 4 characterized in that the body of the plug and the lever are made of a plastic material common to this kind of product, and exhibiting a certain elasticity but that the pusher is made of a hard plastic material.