EP1869993A2 - Cosmetic pencil - Google Patents

Abstract

The pencil has a stopper changing device with a drive body (28) that is attached to an actuating driving rod (16), where the changing device changes a stopper between a momentum stopper (18) and an axially adjacent end stopper. A leading ramp (29) is attached to the housing and combined with the drive body such that the stopper is engaged with the momentum stopper in an actuating position of the driving rod. A pre-tensioning spring (23) pre-tensions the rod relative to a housing (2) in a resting position, where an actuating unit (21) is suspended in the housing in the resting position.

Description

The invention relates to a cosmetic pencil according to the preamble of claim 1.

Such a cosmetic pencil is known from the US 5 011 317 A , The local stop change device is complex and provides, so that a safe function is ensured, high demands on the manufacturing tolerances and on the exact compliance with the material parameters of the components involved.

It is therefore an object of the present invention, a cosmetic pencil of the type mentioned in such a way that the manufacturing cost is reduced for a given reliability of the stop changing device.

This object is achieved by a cosmetic pencil with the features specified in the characterizing part of claim 1.

According to the invention, it has been recognized that a safe impact change using two cooperating actuating push rods can be effected in that deliberately a relative movement between the two currently together a stop pair forming stops by positive guidance of one of the two push rods via a ramp is brought about. The one push rod is deflected in the forced operation with a movement component transverse to its longitudinal axis. This has no role model in the art. Overall, this allows a cosmetic pencil with a housing structure in which the risk of sink marks is minimized by housing wall differences. The single ones Components of the cosmetic pencil can be easily manufactured as injection molded plastic parts. Alternatively, it is possible to carry out the pin housing and also a cap for covering the lead opening as metal components. Special tools for mounting the cosmetic pencil, in particular Ausschraubwerkzeuge for housing components or push rods eliminated.

A distribution of the attacks according to claim 2 leads to a structurally executable with little effort construction of the feed device. Alternatively, it is possible to carry out the first stop on the piston push rod and the second stops on the actuating push rod.

An embodiment according to claim 3 leads to a compact design of the feed device, since the functions "casserole" and "first stop" are compactly summarized on the driver body.

Contact sections according to claim 4 ensure that no unwanted entrainment of the piston push rod on the return of the actuating push rod from the operating to the rest position. A related assurance of the piston push rod can be supported by a corresponding friction of the piston push rod in a given through a passage opening in a housing-fixed component guide.

A plastic biasing spring according to claim 5 leads to a simple construction of the cosmetic pencil. The plastic spring can also be made as an injection molded part and integrate various functions. So then the plastic spring in particular have an intermediate bottom, in which the passage opening is guided to guide the movement of the piston push rod. When using a plastic biasing spring is particular a bayonet connection for the connection on the one hand a Kosmetikprodukt-, so mine housing section, on the other hand, a feed-housing section possible, without thereby manufacturing-related openings of this compound are visible from the outside. A metal spring is eliminated.

A ramp according to claim 6 additionally increases the compactness of the arrangement, as an additional functional integration takes place.

A guide device according to claim 7 leads to a safe and defined relative movement of the push rods in the feed operation.

A receptacle according to claim 8 ensures a secure hold of the mine and also allows easy placement of the cosmetic pencil with the mine.

Fig. 1

Eine perspektivische Ansicht eines Kosmetikstiftes;

Fig. 2

einen Längsschnitt durch den Kosmetikstift nach Fig. 1 ;

Fig. 3

vergleichbar zu einer Explosionsdarstellung sämtliche Einzelkomponenten zum Aufbau des Kosmetikstiftes nach Fig. 1 ;

Fig. 4

eine perspektivische Ansicht einer KosmetikproduktAustauscheinheit für ein Basis-Stiftmodul des Kosmetikstiftes nach den Fig. 1 bis 3;

Fig. 5

einen axialen Längsschnitt durch die KosmetikproduktAustauscheinheit nach Fig. 4;

Fig. 6

ein zu Fig. 3 ähnliche Darstellung der KosmetikproduktAustauscheinheit;

Fig. 7

eine perspektivische Seitenansicht eines weiteren Kosmetikstiftes mit einem anderen Basis-Stiftmodul, welches eine Vorschubeinrichtung für das Kosmetikprodukt aufweist, die in ihren mechanischen Wirkprinzipien von der Vorschubeinrichtung des Basis-Stiftmoduls des Kosmetikstifts nach Fig. 1 abweicht;

Fig. 8

einen axialen Längsschnitt des Kosmetikstiftes nach Fig. 7; und

Fig. 9

eine zu Fig. 3 ähnliche Darstellung der Einzelkomponenten des Kosmetikstifts nach Fig. 7.

Embodiments of the invention will be explained in more detail with reference to the drawing. In this show:

Fig. 1

A perspective view of a cosmetic pencil;

Fig. 2

a longitudinal section through the cosmetic pencil of Fig. 1;

Fig. 3

comparable to an exploded view of all individual components for the construction of the cosmetic pencil of Fig. 1;

Fig. 4

a perspective view of a cosmetic product exchange unit for a base pin module of the cosmetic pencil of Figures 1 to 3.

Fig. 5

an axial longitudinal section through the KosmetikproduktAustauscheinheit of Fig. 4;

Fig. 6

a representation similar to Figure 3 of the KosmetikproduktAustauscheinheit;

Fig. 7

a perspective side view of another cosmetic pencil with another base-pin module, which has a feed device for the cosmetic product, which differs in their mechanical principles of action of the feed device of the base pin module of the cosmetic pencil of Figure 1;

Fig. 8

an axial longitudinal section of the cosmetic pencil of Fig. 7; and

Fig. 9

a view similar to FIG. 3 of the individual components of the cosmetic pencil according to FIG. 7.

A cosmetic stick 1 has a pen housing 2 with a cosmetic product housing section 3 and a feed housing section 4. The pen housing 2 with the cosmetic product housing section 3 and the feed housing section 4 is made of SAN-ABS. The cosmetic product housing section 3 has a cone housing body 5, the z. B. is covered by a cap 6 when storing the cosmetic pencil 1. 2 shows the cap 6 pushed onto the cone housing body 5, wherein the cap 6 abuts against a peripheral collar 7 of the cone housing body 5. A not shown light undercut of the cone housing body 5 and the cap 6 ensure that the cap 6 is held positively on the cone housing body 5 when it rests against the peripheral collar 7 and thus secured. At the same time, the cap 6 can be easily removed from the cone housing body 5 by a user.

Adjacent to the circumferential collar 7, the cone housing body 5 has bayonet segments 8 facing the feed housing section 4, which engage in a corresponding inner circumferential recess of the feed housing section 4 when the cone housing body 5 is mounted. The bayonet segments 8 together with the corresponding bayonet mount in the feed housing section 4 a bayonet lock for connecting these two housing components. Instead of a bayonet lock and a snap connection is possible.

In the cone housing body 5, a cosmetic product in the form of a mine 9 is arranged. The latter can be extended from the cone housing body 5 from a lead opening 10 of this. For extending the mine 9 is a housed in the feed housing section 4 feed device 11, which will be described below.

The mine 9 is in thrust connection with a piston 12 guided in the cone housing body 5. The mine 9 is held in a cup-shaped receptacle of the piston 12. The mine 9 has a diameter of 6 mm. The receptacle of the piston 12 has a corresponding inner diameter. Other mine diameters are possible. In particular, a minimum diameter of 8 mm is possible. On the piston 12, a piston connecting component 13 is formed, the outer diameter is reduced compared to the outer diameter of the other piston 12. Complementary to bayonet segments of the piston connection component 13, circumferential receptacles of a sleeve-shaped connection component 14 of a piston push rod 15 are formed. The piston push rod 15 is made of POM. The piston push rod 15 is connected to the piston 12 in thrust connection and is arranged on the side facing away from the mine 9 of the piston 12. About the formed from the connecting components 13 and 14 bayonet connection is a positive, secure connection between the piston 12 and the feed device 11, to which the piston push rod 15 belongs created.

The feed device 11 further includes an actuating push rod 16. The latter is connected to the piston push rod 15 in thrust connection. The actuating push rod 16 is made of POM. This is done via a stop pair of a first stop 17 which is arranged on the actuating push rod 16 and an axially along the piston push rod 15 in a row equidistant from each other arranged plurality of second stops 18. In the feed position shown in Fig. 2, the first acts Stop 17 of the actuating push rod 16 with the leftmost in Fig. 2 arranged second stop 18 together, so that the mine 9 is present in a starting position with fully retracted into the pin housing 2 piston 12.

Overall, there are two rows of second stops 18 at one level, between which the actuating push rod 16 runs.

There, where the actuating push rod 16 between the two rows of second stops 18 runs up to the stop point 19 facing the end of the piston push rod 15, the two push rods 15, 16 are guided to each other, so that a defined relative movement of the two push rods 15, 16 is possible to each other. This guide is done by a complementary cross-sectional configuration of adjacent sections of the push rod 15, 16. In this guide device is a T-slot guide.

The actuating push rod 16 has on its side facing away from the piston 12 side a plant-Umfangsbund 19. The outer diameter of the Anlage-Umfangsbundes 19 corresponds to the inner diameter of the feed housing section 4. A the plant-Umfangsbund 19 adjacent free end 20 of the actuating push rod sixteenth carries as an actuating element a control knob 21 which is latched onto the free end 20. The control knob 21 protrudes in the manner of a control knob for a pen from the mine 9 opposite end of the feed housing portion 4 also. In a housing opening of the feed-housing section 4, from which the control knob 21 protrudes, a shaped like a sleeve stopper 22 is engaged, which is penetrated by the control knob 21. The control knob 21 is made of SAN-ABS. The plug 22 is made of SAN-ABS. An inner end wall of the plug 22 abuts the abutment circumferential collar 19 of the actuating push rod 16. On the opposite side of the plug 22 is located on the plant circumferential collar 19, a plastic biasing spring 23 at. The plastic biasing spring 23 is made of POM. At its opposite free end, the plastic biasing spring 23 is supported on an inwardly projecting handle 24 of the feed housing section 4th from. This peripheral collar 24 is closely adjacent a parting line between the feed housing section 4 and the cone housing body 5.

Adjacent to the end wall of the bayonet segments 8 bearing free end of the cone housing body 5, the plastic biasing spring 23 has an intermediate bottom 25. The latter has an approximately rectangular passage opening 26 through which the piston push rod 15 is passed.

Part of the feed device 11 is a stop changing device 27. With the latter is carried out to advance the mine 9, a change of the first stop 17 between one of the second stops 18, with which the first stop 17 currently interacts and which is also referred to as the second instantaneous stop, and an axial adjacent another second stop 18, which is also referred to as a target stop. The abutment change device has a driver body 28 which is integrally formed on the actuating push rod 16 at its free, the piston 12 facing the end. The driver body 28 carries on both sides in the manner of wing stubs the two arranged at the same height first stops 17th

With the driver body 28 a ramp 29 acts together. The latter is carried out in the intermediate bottom 25 of the plastic biasing spring 23, which in turn is fixed to the feed housing section 4. The ramp 29 is thus fixed to the pin housing 2.

The plastic biasing spring 23 also belongs to the stop changing device 27.

The axially behind each other equidistantly arranged second stops 18 are formed in the manner of sawteeth. Each steep, in The inclination of these inclined wall sections 30 relative to a longitudinal axis of the pin housing 2 is so small that the wing stubs of the driver body 28 in to the feed direction can slide on the inclined wall portions 30 opposite direction without this, the piston-push rod 15 is displaced axially relative to the pin housing 2.

The cosmetic pencil 1 is mounted as follows:

First, the plastic biasing spring 23 is inserted into the feed housing section 4 to the stop collar 24. A web on the plug side of the feed housing section 4, which cooperates with a corresponding groove on the circumference of the plastic biasing spring 23, ensures that the plastic biasing spring 23 can be inserted into the feed housing section 4 only in a predetermined orientation. The inner diameter of the feed housing section 4 is matched to the outer diameter of the plastic biasing spring 23 so that the two parts in the final assembly position easily clamped together. Now, the piston push rod 15 is inserted into the plastic bias spring 23. This is done in Fig. 2 from the left. The position and the cross section of the passage opening 26 in this case only allow a correct insertion orientation of the piston push rod 15 in the plastic biasing spring 23. The piston push rod 15 is inserted into the plastic biasing spring 23 until the push rod connection component 14 of the piston push rod 15 abuts the intermediate bottom 25 of the plastic biasing spring 23. Subsequently, the already provided with the attached control knob 21 actuating push rod 16 is inserted from the right into the feed housing section 4 in FIG. 2 and threaded into the complementary guidance of the piston push rod 15 in terms of guidance.

When inserting the confirmation push rod 16 in the feed housing section 4, the first stop 17 of the actuating push rod 16 comes first with the in Fig. 3 furthest right lying second stop 18 of the piston push rod 15 into engagement. The actuating push rod 16 pushes the piston push rod 15 during further insertion so long ago until the driver body 28 of the actuating push rod 16 runs onto the ramp 29. In this case, the first stop 17 is disengaged from the second instantaneous stop 18. The piston push rod 15 can then be pushed back in the Fig. 2 to the right to the starting position. Now, the plug 22 is pressed and engaged in the feed housing section 4. Here, the plastic spring between the peripheral collar 19 and the peripheral collar 24 is slightly biased.

Upon actuation of the control knob 21, so with an insertion of this in the pin housing 2, the piston push rod 15 is first advanced by the operation push rod 16 by a feed path by the engagement of the first stop 17 with the second instantaneous stop 18, the at least is as large as the distance between two second stops 18. After this feed path of the driver body 28 has accumulated so far on the ramp 29, that the first stop 17 with the second instantaneous stop 18 is disengaged. Another feed of the piston push rod 15 is therefore no longer independent of whether the control knob 21 is pressed further into the pin housing 2. When you release the control button 21 the latter is due to the bias of the plastic biasing spring 23 is pushed back into the rest position shown in FIG. 2, until the circumferential collar 19 abuts the plug 22. During this pushing back the driver body 28 slides on the inclined wall portions 30 of the piston push rod 15. The piston push rod 15 is hereby not axially displaced relative to the pin housing 2, so that in the rest position of the control knob 21, the first stop 17 now with the second target Stop 18, which is axially adjacent to the previous second instantaneous stop 18, in FIG. 2, axially.

4 to 6 show a cosmetic product exchange unit 31 for a base pen module 32 of the cosmetic stick 1. The base pen module 32 comprises all the components of the cosmetic stick 1 without the cosmetic product housing section 3, the piston 12 and the refill 9.

The cosmetic product replacement unit 31 has a replacement housing 33 which is identical to the cosmetic product housing section 3, that is to say the cone housing body 5 and the cover cap 6. A mounted on the replacement housing 33 and locked with this via a bayonet cap 34 closes the exchange housing 33 on the side of the piston 12. The end cap 34 is made of polypropylene (PP). In the region of the pin housing longitudinal axis at the bottom of the end cap 34 molded support 35 serves for defined conditioning of the piston connection component 13. In exchange housing 33 of the cosmetic product exchange unit 31, the mine 9 and the piston 12 in the same orientation and position to the cone housing body 5 as the cosmetic product housing portion 3 of the cosmetic pencil 1 arranged.

• Zunächst wird der Kolben 12 mit führender Aufnahmeöffnung in den Konus-Gehäusekörper 5 eingeschoben und zwar von der Seite her, an der sich am Konus-Gehäusekörper 5 die Bajonettsegmente 8 befinden. Stege 36, die an der Außenwand des Kolbens 12 angeformt sind, laufen dabei in axialen Nuten an der Innenwand des Konus-Gehäusekörpers 5, so dass der Kolben 12 im Konus-Gehäusekörper 5 gegen Verdrehung gesichert ist. Eine Rastung, die durch komplementär geformte Rastelemente am Kolben 12 einerseits und am Konus-Gehäusekörper 5 andererseits gebildet sind, zeigt die Montage-Entstellung des Kolbens 12 im Konus-Gehäusekörper 5 an. Nun wird die Abschlusskappe 34 am Konus-Gehäusekörper 5 über die Bajonettverbindung angebracht. Anschließend wird die Mine 9 in die Aufnahme des Kolbens 12 eingesetzt und es wird schließlich noch die Abdeckkappe 6 auf den Konus-Gehäusekörper 5 aufgesetzt.

The cosmetic product replacement unit 31 is assembled as follows:

• First, the piston 12 is inserted with a leading receiving opening in the cone housing body 5 and that from the side at which the bayonet segments 8 are located on the cone housing body 5. Webs 36, which are integrally formed on the outer wall of the piston 12, run in axial grooves on the inner wall of the cone housing body 5, so that the piston 12 is secured in the cone housing body 5 against rotation. A latching, which are formed by complementary shaped locking elements on the piston 12 on the one hand and on the cone housing body 5 on the other hand, indicates the assembly disfigurement of the piston 12 in the cone housing body 5 at. Now the end cap 34 is attached to the cone housing body 5 via the bayonet connection. Subsequently, the mine 9 is inserted into the receptacle of the piston 12 and it is finally the cap 6 is placed on the cone housing body 5.

To replace a cosmetic product housing section 3 with spent mine 9 against a new cosmetic product exchange unit 31, the bayonet connection between the cosmetic product housing section 3 and the feed housing section 4 is achieved. The end cap 34 is detached from the cosmetic product exchange unit 31 and the latter is connected to the feed housing portion 4 of the cosmetic pen 1. At the same time a bayonet connection between the exchange housing 33 and the feed housing section 4 on the one hand and between the piston connection component 13 and the push rod connection component 14 is produced. The cosmetic pencil 1 is then ready for use with fresh mine 9 again.

FIGS. 7 to 9 show a further variant of a cosmetic pencil in which also the cosmetic product replacement unit 31 can be used. Components which correspond to those which have already been explained above with reference to FIGS. 1 to 6 bear the same reference numerals and will not be discussed again in detail.

A base pin module 37 of the cosmetic pencil according to FIGS. 7 to 9 has a feed device 38 with an operating wheel 39. The latter protrudes with a peripheral section out of a feed housing section 40 of the cosmetic pencil 1 according to FIGS. 7 to 9. The operating wheel 39 is made of SAN-ABS. The feed housing section 40 is made of SAN-ABS. At stub axles 41, which are led out on both sides of the operating wheel 39, gears 42 are formed on the operating wheel 39 respectively. The gears 42 mesh with two mutually parallel rack sections 43 of a piston push rod 44 of the cosmetic pencil 1 of FIGS. 7 to 9. The piston push rod 44 is made of POM. To the rack portions 43, facing the piston 12, the push rod connecting body 14 is formed, which is identical to the push rod connecting body 14 of the embodiment of FIGS. 1 to 3 executed. The piston push rod 44 in turn passes through the passage opening 26 of the plastic biasing spring 23.

The stub axles 41 of the actuating wheel 39 are latched in latching receptacles 45 of a diaphragm housing section 46. The bezel housing portion 46 is made of SAN-ABS. The bezel housing section 46, which surrounds the operating wheel 39, is in turn latched into a receptacle of the feed housing section 40.

Also, in the assembly of the cosmetic pencil 1 of FIGS. 7 to 9, the plastic biasing spring 23 is first introduced into the feed housing portion 40, as explained in connection with the assembly of the cosmetic pencil 1 of FIGS. 1 to 3. Subsequently, the plug 22 is inserted and locked into the feed housing section 40 in FIG. 8 from the right. Now the piston push rod 44 is inserted in Fig. 8 from the left through the passage opening 26 in the plastic biasing spring 23. The actuating wheel 39 is latched into the latching receptacle 45 of the diaphragm housing section 46 and then the diaphragm housing section 46 is latched into the receptacle of the feed housing section 40. By turning the actuating wheel 39, the mine 9 can be pushed out of the lead opening 10 or pushed back into the pin housing 2 into it.

In both embodiments, ie in the embodiment according to FIGS. 1 to 3 with the operating button 21 for lead feed and in the embodiment according to FIGS. 7 to 9 with the operating wheel 39 for lead feed, the profile cross section of the piston push rod 15 and 44, respectively the internal cross-section of the passage opening 26 in the plastic biasing spring is adjusted so that when moving the piston push rod 15 and 44, a friction in the guide through the passage opening 26 occurs. This friction is greater in the embodiment of FIGS. 1 to 3 than the friction between the piston push rod 15 and the actuating push rod 16. This supports that upon return of the actuating push rod 16 from the actuating to the rest position Piston push rod 15 is not undesirable entrained by the actuating push rod 16. In the embodiment according to FIGS. 7 to 9, the friction between the piston push rod 44 and the inner wall of the passage opening 26 causes a certain axial pressure the mine 9 can be exercised in use, without this causing the mine 9 undesirably pushes back into the pin housing 2.

Claims (8)

Cosmetic pencil (1) with a pin housing (2), - With a from the housing (2) from a mine opening (10) extendable mine (9), - With a in the housing (2) arranged feed device (11) for extending the mine (9), - wherein the mine (9) is in thrust connection with a piston (12) guided in the housing (2), - wherein the feed device (11), - A piston push rod (15) which is in thrust connection with the piston (12) and on which the mine (9) facing away from the piston (12) is arranged, - An actuating push rod (16) which is in thrust connection with an actuating element (21) which is disposed at one of the mine opening (10) opposite end of the actuating push rod (16), - Wherein the actuating push rod (16) with the piston push rod (15) via a stop pair (17, 18) made --- one on one of the two push rods (15, 16) arranged first stop (17) and --- an axially along the other push rod (16, 15) behind one another equidistant from each other arranged plurality of second stops (18),
is in thrust connection, - With a stop change device (27), with the lead for the lead change of the first stop (17) between a Second instantaneous stop of the second stops (18), with which the first stop (17) currently cooperates, and an axially adjacent second target stop (18), characterized in that the stop changer (27) comprises: a driver body (28) fixed to the actuating push rod (16), - At least one with the driver body (28) cooperating, on the housing (2) fixed ramp (29) whose ramp slope is such that in an operating position of the actuating push rod (16) of the first stop (17) with the instantaneous stop (18) disengaged as soon as the driver body (28) has traveled a feed path which is at least as large as the distance between two adjacent second stops (18), - A biasing spring (23) which biases the actuating push rod (16) relative to the housing (2) in an unactuated rest position in which the actuating element (21) from the housing (2) is pushed out. Cosmetic pencil according to claim 1, characterized in that the first stop (17) on the actuating push rod (16) and the second stops (18) on the piston push rod (15) are arranged. Cosmetic pencil according to claim 2, characterized in that the driver body (28) has the first stop (17). Cosmetic pencil according to one of claims 1 to 3, characterized in that contact portions (17, 30) between the push rods (15, 16) are shaped so that a return of the actuating push rod (16) from the operating position to the rest position by passing each other by sliding the push rods (15, 16) is given, without in this case the piston push rod (15) relative axially displaced to the housing. Cosmetic pencil according to one of claims 1 to 4, characterized in that the biasing spring (23) is designed as a plastic spring. Cosmetic pencil according to one of claims 1 to 5, characterized in that the ramp (30) is integrally formed on the biasing spring (23). Cosmetic pencil according to one of claims 1 to 6, characterized in that the push rods (15, 16) at least partially have a guide means for guiding their axial relative movement to each other. Cosmetic pencil according to one of claims 1 to 7, characterized in that the refill (9) is held in a cup-shaped receptacle of the piston (12).

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