Abstract:
A dispenser for dispensing a material and a method of use thereof. The dispenser includes a chamber with a discharge opening for holding and dispensing a material, a spindle located in the chamber, capable of being rotated, a rotatable toothed wheel located outside the chamber that is connected to the spindle to permit rotation of the spindle, and a moveable piston, connected to the spindle, for supporting and dispensing the material. The dispenser also includes at least one actuating button located on the dispenser, having a pusher element for rotating the toothed wheel, and at least one pusher deflector for deflecting the pusher element out of engagement with the toothed wheel. The pusher deflector permits the material to be pushed back into the dispenser after use by disengaging the pusher element with the toothed wheel. The dispenser is particularly useful for dispensing a deodorant, gel, or cream.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application under 35 U.S.C. § 371 of international application PCT/EP00/03385 filed on Apr. 14, 2000, the international application not being published in English. This application also claims priority under 35 U.S.C. §119 to DE 199 18 410.0, filed on Apr. 23, 1999 and DE 199 21 662.2, filed on May 11, 1999. 
    
    
     FIELD OF THE INVENTION 
     The invention relates to a dispenser packaging for a cream-like mass or a mass ripped away by wiping a surface, comprising a chamber with a delivery opening for receiving and storing the mass, a spindle longitudinally axially and rotatably arranged in the chamber, a piston movable in the chamber along the spindle, a toothed wheel arranged outside the chamber in fixed rotational connection with the spindle, and at least one actuating button, which is arranged at the dispenser packaging, with a moulded on pusher element, wherein the at least one actuating button together with the pusher element is arranged to be movable in such a manner relative to the toothed wheel from a rest setting into an end setting and back that on actuation of the actuating button from the rest setting into the end setting the pusher element goes into engagement with a tooth of the toothed wheel and rotates this. 
     BACKGROUND OF THE INVENTION 
     Dispenser packagings of that kind, in which the user actuates a button while holding the packaging in hand and this button actuation sets a spindle in rotation, which leads to delivery of product from the dispenser packaging, are used for the dispensing of cream or as a deodorant stick. 
     A dispenser packaging according to this category is known from U.S. Pat. No. 5,839,622. This dispenser packaging comprises a toothed wheel which is connected with a spindle for the advance of a piston and which has teeth at its circumferential surface. A pusher element of an actuating button engages in these teeth in the case of its inwardly directed forward movement from its rest setting into its end setting and thus rotates the toothed wheel through a limited travel. In its end setting the pusher element remains in engagement with the toothed wheel surface. In addition, the toothed wheel has, at its underside front edge surface, further teeth which are formed in correspondence with ramp-shaped teeth at an element in the base region of the prior known dispenser packaging and on rotation of the toothed wheel slide on their ramp surfaces bearing against one another. After reaching the highest point of the ramp surface of the element arranged at the base side, the toothed wheel jumps, under the pressure of a spring, to the succeeding ramp-shaped toothed element. If the user now releases the actuating button, this moves back into its rest setting, whereby the pusher element comes out of engagement with the toothed wheel. A return rotation of the toothed wheel against the rotational direction effected by the pusher element of the actuating button is prevented by the mutually contacting projecting edges of the ramp-shaped teeth. 
     In the case of this prior known dispenser packaging a return movement of the piston against the rotational direction of the spindle for the toothed wheel is thus not possible not only when the actuating button is pressed, because the pusher element of the actuating button then engages in the toothed wheel, but also when the actuating button is disposed in rest setting, because the teeth of the toothed wheel at the front edge side then stand in engagement with the respective counterpart thereof. 
     There against, the invention has the object of creating a solution which enables return movement of the piston against the spindle rotational direction driven by the pusher. 
     SUMMARY OF THE INVENTION 
     In a dispenser packaging of the kind denoted in the introduction this object is met by the dispenser packaging having at least one pusher deflector against which the at least one pusher element abuts before reaching the end setting and which deflects the pusher element out of engagement with the toothed wheel. 
     It is thereby achieved that the pusher element in its forward movement directed inwardly of the packaging, after it has rotated the toothed wheel through a specific angular setting, is lifted by the pusher deflector out of its engaged setting with the toothed wheel. This now enables, in the pressed setting of the actuating button into its end setting, a return displacement of the piston and thus a rotation of the spindle and the toothed wheel against the rotational direction driven by the pusher. Thus, for example in the case of a deodorant stick, any mass protruding beyond the delivery opening of the dispenser packaging can be pressed back into the dispenser packaging. 
     In order to ensure that the pusher element initially goes securely into engagement with the toothed wheel, but nevertheless a lifting out is possible before reaching the end setting, the invention proposes in an advantageous development that the pusher element consists of a web-shaped or rod-shaped base body with a moulded-on nose facing the teeth of the toothed body and a deflector web disposed at a spacing from the nose and directed oppositely to the direction of the nose. 
     It is advantageous for manipulating the actuating button if the actuating button and the pusher element are resiliently arranged and/or intrinsically resiliently constructed in such a manner that the actuating button together with the pusher element automatically moves back out of the end setting into the rest setting. In particular, it is of advantage if the actuating button and the pusher element are constructed to be inherently resilient, so that they automatically move back out of the end setting into the rest setting. This simplifies the constructional cost of the dispenser packaging, as a restoring spring is then not necessary. 
     In further refinements, the invention alternatively proposes that either the tooth edges of the teeth of the toothed wheel are oriented parallel to the spindle longitudinal axis and the pusher element scans the toothed wheel tangentially or that the tooth edges of the teeth of the toothed wheel are oriented perpendicularly to the spindle longitudinal axis and the pusher element scans the toothed wheel radially. 
     According to a development of the invention it is of advantage for ergonomic handling of the dispenser packaging if two diametrically oppositely disposed actuating buttons with pusher elements are arranged at the dispenser packaging, wherein on actuation of the actuating buttons the elements substantially simultaneously come into engagement with the toothed wheel at diametrically opposite regions thereof. 
     Advantageously and equally proposed by the invention, in this embodiment a pusher deflector is associated with each pusher element. 
     In order to facilitate return pressing of the piston against the spindle rotational direction driven by the pusher it is of advantage if the spindle has a thread inclination of 45°. 
     In order that a pushing back of the piston and the associated rotational movement of spindle and toothed wheel against the rotational direction driven by the pusher are possible only in the case of intentional use by the user, the invention finally proposes that the nose of each pusher element in the rest setting of the actuating button engages with the toothed wheel in a manner preventing return rotation of the toothed wheel against the button actuating direction. It is thereby achieved that pushing back of the piston is possible exclusively when the actuating button or actuating buttons is or are pressed into the end setting thereof. 
     The invention is described in more detail in the following by way of example with reference to the drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIGS. 1 and 2 show front and side views, respectively, of a dispenser packaging according to the invention, 
     FIG. 3 shows a cross sectional view, along the line III—III in FIG. 1, with illustration of the spindle and toothed wheel in side view, 
     FIG. 4 shows a partial sectional view, along the line IV—IV in FIG. 2, with illustration of the spindle, the toothed wheel and actuating buttons in side view, and 
     FIG. 5 shows a perspective view of part of the inside of the dispenser packaging of FIG.  1 . 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The dispenser packaging denoted in its entirety by  1  in FIGS. 1 and 2 consists of an outer case  2  with a removable cover at the upper end. Both cover  3  and outer case  2  are of oval profile in cross-section. Two diametrically opposite openings are formed in the side surfaces of the outer case  2  and are each penetrated by a respective actuating button  4  from the inner side of the dispenser packaging  1 . The surfaces of the actuating buttons  4  penetrating the openings terminate flushly and the contours thereof continue the adjoining outer surfaces of the outer case  2 . 
     As is apparent from FIGS. 3 and 4, a chamber  5  is arranged within the outer case  2 . The chamber  5  is bounded by side walls  6 , which are similarly arranged to be oval-shaped in cross-section, and by a base surface  7 . An encircling, protruding apron  8  is moulded onto the side surfaces  6  at the upper end on the side remote from the base surface  7 . The apron  8  has at its ends directed towards the actuating buttons  4  a greater spacing from the side surfaces  6  than from the longitudinal sides thereof. The apron  8  engages over an edge region  9 , which is provided partly with incisions, of the outer case  2  in such a manner that the chamber  5  is thereby attached to the upper edge region of the outer case  2 . Altogether, the chamber  5  is pushed into the outer case  2  which has an opening at the upper end and a base at the lower end. The apron  8  surrounds a delivery opening  10  of the chamber  5 . 
     An opening is formed centrally and axially in the base surface  7 . This opening is surrounded by a first cylinder wall  11 . The first cylinder wall  11  is surrounded by a second, circular cylinder wall  12  at a spacing. The first cylinder wall  11  and the second cylinder wall  12  are connected together by a circularly annular base surface  13 . The second cylinder wall  12  is in turn connected with the base surface  7  of the chamber  5 , so that the second cylinder wall  12  and the surface  13  together form a cup-shaped depression in the base surface  7 . The edge region  14 , which faces the chamber  5 , of the first cylinder wall  11  is formed to be inclined slightly inwardly and is divided into individual, in the present case four, segments by incisions. These segments bear against an undercut  17  of a spindle  15 , which penetrates the opening and the chamber  5  and is arranged in the chamber  5  to be longitudinally axial and rotatable. A toothed wheel  16  is arranged, on its side remote from the chamber  5 , at the spindle  15  to be in fixed rotational connection with the spindle  15 , in the present case moulded onto the spindle  15 . The region of the undercut  17  and the surface, which faces the chamber  5 , of the toothed wheel  16  are thereby spaced apart in such a manner that the spindle is secured by the edge region  14  and the circularly annular base surface  13  of the chamber  5  against longitudinally axial movement. In the present example the thread turns of the spindle  15  have an inclination of 45°. This is advantageous for the form of embodiment, which is illustrated here, of a deodorant stick when through application of an external force, as subsequently explained in more detail, the user wishes to manually press back withdrawn mass or a piston  18  into the chamber  5 . The thread turns of the spindle  15  can, however, readily also have other inclinations, for example 20°. 
     The piston  18  is arranged within the chamber  5  and has a central opening  19  with threads, by means of which it is movable back and forth in the chamber  5  by rotational movement of the spindle  15 . In the embodiment the piston is a through flow piston having openings  20  into which mass, introduced in liquid state into the chamber  5 , can penetrate in order to produce a good anchorage of the piston in the mass after cooling and hardening of the mass. This embodiment is particularly advantageous for the application of deodorant mass for production of the dispenser packaging  1  as a deodorant stick. In the case of cream-like or gel-like mass stored in the chamber  1 , a piston, which is closed at the outer side, without openings  20  is expediently used. 
     The actuating buttons  4  have fastening webs  21  which are oriented in direction towards the delivery opening  10  and which represent the fastening of the actuating buttons  4  to the outer case  2  in a manner enabling rotational movement about a rotational axle  22 . The rotational axles  22  form the fulcrum of the actuating buttons  4  constructed overall as a lever. The other side of the lever is formed by pusher elements  23  which are each connected by way of a respective fastening web  24  with the respective actuating button  4 . The pusher elements  23  each consist of a web-shaped or rod-shaped base body  25  which is moulded onto the respective one of the fastening webs  24 . A nose  27 , which by its tip faces the toothed wheel  16  for engagement between individual teeth  26  of the toothed wheel  16 , is moulded onto each of the base bodies  25 . A deflector web  28  is then formed at the end of the respective pusher element  23 , preferably constructed integrally with the pusher element, at a further spacing from the respective fastening web  24  than the respective nose  27 . In that case the deflector webs  28  each project by angled extension from the surface of the pusher element  23  in the direction opposite to the tip of the nose  27 . 
     The actuating button  4  together with all its elements  21 ,  23 ,  24 ,  25 ,  27 ,  28  and  29  is produced as a whole in one piece from plastics material. The arrangement, and mounting of the actuating button at the rotational axle  22  connected with the outer case  2  is oriented in such a manner that in the rest setting of the actuating buttons as illustrated in the drawings the pusher elements  23  bear tangentially against the toothed wheel  16  or are oriented tangentially to the toothed wheel  16  at a small spacing therefrom, wherein the noses  27  each engage in the intermediate space formed by two teeth  26  of the toothed wheel  16 . 
     In addition, short guide webs  29  extend out from the fastening webs  24 . On actuation of the actuating buttons  4  in the direction of the arrows  30  the guide webs  29  slide along guide segments  31  standing out from the base surface  7 . It is thereby ensured that the actuating buttons  4  when actuated are moved in guided manner from their rest setting in direction of the arrows  30  into their end setting. 
     Two diametrically opposite pusher deflectors  32  extending parallel to the teeth  26  of the toothed wheel  16  protrude from the second cylinder wall  12  and the base surface  7 . The side surface, which faces the respective deflector web  28 , of the pusher deflector  32  is arranged at an angle to the principal geometric axes of the base surface  7 , which angle corresponds with the inclination and angle of the deflector web  28  relative to the pusher base body  25 . 
     The delivery opening  10  is closed by a cover element  33  which sealingly bears against the side walls  6  by a web-shaped edge region and which has a dished cover region. The cover element  33  bears by a web-shaped ridge  34  against the inner side of the cover  3 , which attaches the cover element  33  to the dispenser packaging  1  by engaging over in friction seating with the apron  8  and impact abutment relative to the outer case  2 . 
     If the dispenser packaging  1  is to be provided for dispensing cream-like or gel-like mass, the cover element  33  can be provided with slot-shaped openings, which are not illustrated, and during the actuation of the dispenser device  1  remain on the delivery opening  10 , where against the cover element  33  in the case of use as a deodorant stick, as illustrated in the embodiment, has to be removed together with the cover  3  from the delivery opening  10  or the outer case  2 . 
     The dispenser packaging  1  is filled through the delivery opening  10  with liquid deodorant mass, which hardens after putting on the cover element  33  in the overhead setting of the dispenser packaging  1 , or with a cream-like or gel-like mass. 
     In the case of application or use, the user actuates the actuating buttons  4  in the direction of the arrows  30 . The pusher elements  23  are thereby equally moved in the direction of the arrows  30 , hit by their noses  27  against teeth  26  of the toothed wheel  16  and rotate this until the deflector webs  28  then strike the inclined surfaces of the pusher deflectors  32  and the pusher elements  23  are deflected by virtue of their inherent resilience in such a manner at the pusher deflectors  32  that the noses  27  come out of engagement with teeth  26  of the toothed wheel  16 . The deflecting or diverting movement of the deflector webs  28  on the pusher deflectors  32  is continued until the fastening webs  24  of the actuating buttons  4  come into abutment with the guide segments  31  and a further, inwardly directed pivotation or movement of the actuating buttons  4  in the direction of the arrows  30  is thereby stopped. This is the end setting of the actuating buttons  4  constructed as a lever. Due to the rotation of the toothed wheel  16  effected by the movement of the actuating buttons  4  from the rest setting into the end setting, the spindle  15 , which is connected in rotationally fixed manner therewith, is rotated at the same time and the piston  18  has been moved in direction towards the delivery opening  10 . By virtue of this piston movement the mass disposed in the chamber  5  has been transported beyond the opening edge. 
     If the user now releases the actuating buttons, then these automatically move back into the rest setting illustrated in the figures by virtue of their inherent resilience as well as the fact that the fastening webs  21 , which are formed above the rotational axles  22 , bear against the inner side of the outer case  2  and thereby on movement of the actuating buttons  4  to the end setting a rearward torque, or a corresponding force, directed against this movement is exerted by the fastening webs  21 . The user does not need to release the actuating buttons  4  for this purpose, as it is also sufficient if when grasping the buttons by hand the user no longer exerts force in the direction of the arrows  30 . After reaching the rest setting, a renewed actuation of the actuating buttons  4  can be carried out by the user. This actuation can be continued by the user until, by means of the piston advance, product quantities corresponding to the user&#39;s wishes have exited from the delivery opening  10  or, in the case of a deodorant mass, until the deodorant stick protrudes to sufficient extent beyond the rim of the delivery opening  10 . If the user wants to guide this protruding mass back into the chamber  5 , the user presses the actuating buttons  4  until these have reached their end setting by abutment of the fastening webs  24  against guide segments  31 , then places the cover element  33  on the deodorant mass and pushes this back into the chamber  5  with light application of pressure. By virtue of the 45° thread of the spindle and the fact that the pusher elements  23  in the end setting do not stand in engagement with teeth  26  of the toothed wheel  16 , the piston  18  can move back into the chamber  5  under rearwardly directed rotation of spindle  15  and toothed wheel  16 . 
     Whereas in the case of the illustrated embodiment the tooth edges  35  of the teeth  26  of the toothed wheel  16  are oriented parallel to the spindle longitudinal axis and the pusher elements  23  scan the toothed wheel  16  tangentially, it is also possible to provide the tooth edges of the teeth of the toothed wheel perpendicularly to the spindle axis on the surface of the toothed wheel parallel to the base surface  7  and then let the pusher elements radially engage in the teeth. 
     Moreover, the noses  27  are arranged at the pusher elements  23  in such a manner that in the rest setting of the actuating buttons  4  at least one nose  27  bears against a tooth edge  35  and thus prevents a return rotation of the toothed wheel  16  against the movement direction of the actuating buttons  4 .