FR2736522A1 - MECHANISM OF A COMBINED MOVEMENT LIKE RED LIKE CASE - Google Patents

Abstract

The object of the invention is a lipstick case mechanism that is economical to manufacture, offering a minimum total height in the protective position, while benefiting from a maximum stroke in the dispensing position. In the case of the invention, when the user rotates the maneuvering base (1) relative to the cover (3), the retracting movements of the cover (3) in the maneuvering base (1) and of rise of the bucket (4) relative to the maneuvering base (1) combine to increase the output of the stick of lipstick (5) relative to the cover (3).

Description

The subject of the invention is a mechanism for a low-cost lipstick case

  at manufacture, offering a minimum overall height in the protection position, while benefiting from a maximum

distribution position.

  Generally, a lipstick case has a rotating mechanism for ejecting or retracting the lipstick stick inside a protective case, this mechanism usually comprising: a circular cylindrical outer body, a sheath rotating in this body and being secured at one of its ends, a control base, and - a slider carrying the lipstick stick and axially movable in the sheath, its movement being controlled by a

  rotational movement of the base relative to the body of the case.

  This mechanism proves to be quite expensive to manufacture.

  The object of the invention is to propose a novel mechanism of a lipstick case which is economical to purchase and which has a longer exit length.

for the same size.

  For this purpose, the lipstick case mechanism is characterized in that it comprises: - an operating base comprising at least two pins, - a cover having a helicofdale groove cooperating with at least one pin of the operating base, and a first protruding or recessed portion such as a lug or a longitudinal groove, - a bucket comprising a second recessed or protruding portion such as a lug or longitudinal groove and slidable with respect to the first portion respectively protruding and recessed, and secured to a tubular sheath having a helicofdral groove cooperating with

  less a nipple of the drive base.

  It will be understood that by suitably selecting the different pitch parameters of the helical grooves, for the same length of stick of lipstick output, a smaller bulk is obtained in the

  measure o the cache can be partially retracted into the base.

  Advantageously, the drive base is composed of a double wall, the cache entering and leaving the cylindrical gap arranged

between the two walls.

  According to another characteristic of the invention, the maneuvering nipples respectively of base / shaft cooperation and base / cover cooperation are carried by the double inner wall of the base.

  respectively inside and outside this wall.

  The invention and its implementation will appear more clearly in

  with the aid of the description which follows, made with reference to the appended drawings,

  in which: - Figure 1 shows, in longitudinal middle section, an embodiment of a lipstick case according to the invention protective cover released; FIG. 2 shows, in median longitudinal section, the case of FIG. 1 (turned by 90) in the dispensing position without its cover.

protection.

  Referring to Figures 1 and 2, we see that the mechanism consists essentially of a drive base 1, a cover 3, a bucket 4 and a shaft 6 integral with the bucket 4. The cache 3 and the shaft 6 have helical grooves respectively 8 and 11 whose steps are

of opposite meanings.

  Preferably, the base is composed of two walls 1a and 1b between which the cover 3 moves. The inner wall 1b of the operating base 1 has, in fact, on its external face two pins 12 and on its inner face two pins 7 respectively running helical grooves 11 formed inside the cover 3 and the helical grooves 8

of the shaft 6.

  Furthermore, the cover 3 has a longitudinal groove 10 projecting, while the bucket 4 comprises a longitudinal groove 9 made recessed. The two longitudinal grooves 9 and 10 cooperate so that the only movement remaining between the cover 3 and the bucket 4 is a translation

  they can not turn relative to each other.

  To pass from the protective position of FIG. 1 to the dispensing position of FIG. 2, it will be considered that the user of the lipstick tube holds the cover 3 in a fixed position while it is rotating.

the operating base 1.

  The pins 12 disposed on the outer face of the inner wall 1a of the operating ring 1 then progress in the helical groove 11 of the cover 3 so that at the end of operation the operating ring 1 is mounted with a stroke A The nipples 7 of the internal face of the inner wall 1a of the operating base 1 run simultaneously through the helical groove 8 of the shaft 6. The displacement of the shaft relative to the base 1 during this operation is equivalent to the race B, adding to the stroke A of displacement of the cover 3 relative to the operating base 1 so that the stick of lipstick 5 is out of a race C sum of the races A and B. By choosing suitable helical pitch and reverse direction for the helical grooves 8 and 11 respectively of the shaft and the cover, because of the combined movements of the cover 3 and the bucket 4 relative to the drive base, the mechanism of lipstick case of the invention allows to obtain, for a given total height, a longer lipstick stick output length 5. In addition, for a given helical pitch and a rotation of the operating base 1 with respect to the given cover 3, the output movement of the lipstick stick 5 with respect to the cover 3 is greater than that obtained in the case where there is only one helical groove. The cover 3 externally has a projection 13 abutting against an inner rim 14 of the operating base 1. In the dispensing position of the lipstick tube (FIG. 2), these two complementary parts 13 and 14 abut one against the other in order to stop the relative movement of the cover 3 relative to the bucket 4. When mounting the mechanism, the cover 3 will be engaged elastically by force so that the projection 13

  come under the rim 14 of the distribution base 1.

  The helical grooves 8 and 11 advantageously have at their end a recess 15 and 16 in order to maintain the tube of red to

  lips in the in and out position.

  The mechanism of the invention can, moreover, receive a protective cover 2 coming to be positioned above the operating base 1

  and around the cover 3 to completely close the lipstick tube.

Claims (6)

  1. Lipstick case mechanism, characterized in that it comprises: a maneuvering base (1) comprising at least two nipples (7, 12),   - A cover (3) having a helical groove (11) cooperating with at least one stud (7) of the actuating base (1), and a first portion (10) projecting or recessed such as a pin or a longitudinal groove, - a bucket (4) comprising a second portion (9) recessed or protruding such that a lug or longitudinal groove and slidable relative to the first portion (10) respectively projecting or recessed, and secured to a shaft (6) having a co-operating helical groove (8)   with at least one pin (12) of the operating base (1).   2. Mechanism according to claim 1, characterized in that the operating base (1) is composed of a double wall (la, lb) and that the cover (3) can enter and exit the cylindrical gap between the two walls.   3. Mechanism according to claim 2 characterized in that the maneuvering nipples respectively (7) of the base (1) / base (6) and (12) cooperation base (1) / cache (3) cooperation are carried by the double internal wall (lb) of the base (1) respectively inside and outside of this wall (lb).   4. Mechanism according to any one of the claims   preceding, characterized in that the helical grooves (8) and (11) have not in the opposite direction.   5. Mechanism according to any one of the claims   preceding, characterized in that the helical grooves (8, 11) have   a setback at their end.   6. Mechanism according to any one of the claims   previous, characterized in that the cover (3) has a projection (13) lock adapted to cooperate with an inner rim (14) of the base of maneuver (1).