Patent Application
20170344874
The invention pertains to a counter for a handheld device for dispensing a pharmaceutical substance with a housing, at least one counter wheel with readable characters and a drive part designed for rotating the counter wheel, wherein the counter wheel is rotatably attached to a mounting part.
The invention also pertains to a counter for a handheld device for dispensing a pharmaceutical substance with at least one counter wheel with readable characters and a drive part designed for rotating the counter wheel.
The invention furthermore pertains to a counter for a handheld device for dispensing a pharmaceutical substance with at least one counter wheel, which has readable characters and is designed cylindrically and with a central axis, and a drive part designed for rotating the counter wheel, wherein the counter wheel is provided with an engagement toothing, by means of which the drive part, which has a rotational axis, acts upon the counter wheel in order to realize its rotation.
Such counters are already known in different variations. In this context, we particularly refer to WO 2007/104694 A1 (U.S. Pat. No. 8,132,565 B2).
This publication discloses a counter that is during the intended use arranged on the upper side of a reservoir chamber of the handheld device, wherein said reservoir chamber contains the pharmaceutical substance. It is acted upon due to a direct pressure actuation by the user. A rotational axis of the drive part is accommodated in two bearing formations that are integrally formed on the inner side of an actuating button such that they protrude downward. The counter wheel is accommodated between the actuating button and a housing wall, both of which respectively also form part of the housing.
With respect to the prior art, we furthermore refer to WO 2006/051073 A1 (U.S. Pat. No. 7,448,342 B2). The counter known from this publication is during the intended use positioned underneath a closed receptacle containing the pharmaceutical substance and arranged in the handheld device. It is actuated by pressing the receptacle downward. The counter wheel is accommodated between a lower ring part and an upper housing cover. The drive part is loosely inserted and—initially—acts upon the counter wheel by means of a disk part, as well as by means of a planet wheel. In the object of the initially cited publication, the only return spring provided is the return spring that altogether returns the actuating button and is accommodated between the actuating button and an intermediate bottom of the housing. In the object of the additionally cited publications, the drive part features springable driving fingers that act upon the disk part.
Based on the above-described prior art, the invention aims to disclose an advantageous counter for a handheld device for dispensing a pharmaceutical substance, particularly a counter that is acted upon by the receptacle containing the pharmaceutical substance.
According to a first aspect of the invention, this objective is attained with a counter, in which the mounting part is realized independently of the housing and the drive part is also attached to the mounting part. The drive part preferably is directly attached to the mounting part, i.e. without an intermediate part. To this end, the drive part may be connected to the mounting part by means of a form-fitting connection such as, e.g., a snap-in mechanism. A very simple design is achieved due to the fact that the drive part is also attached to the mounting part. No additional part is required. The mounting part does not simultaneously form part of the housing of the handheld device. It particularly does not simultaneously form an outer wall of the housing. In fact, the counter with the mounting part is designed for being inserted into a housing of the handheld device.
The above-defined objective is also attained with a counter wheel, in which the counter features a return spring for the retrodisplacement after an actuation and the spring, which is realized separately of the drive part, features an engagement part for interacting with the drive part. The spring, which is preferably arranged underneath the counter referred to the actuating direction thereof and therefore particularly arranged underneath the mounting part and the counter wheel, has another function, namely a direct interaction with the drive part in order to realize the driving function and thereby the rotation of the counter wheel. In this case, one part can also be advantageously eliminated such that a correspondingly compact design of the counter can be achieved. The engagement part is engaged with the drive part during the course of a deflection of the return spring from an idle position into an actuating position. The engagement part and the drive part preferably do not contact one another in the idle position. During the course of an actuation, the engagement part including an actually engaged engagement end moves relative to the mounting part and the counter wheel, namely in the direction of a central axis of the counter wheel and/or the mounting part.
The above-defined objective is furthermore attained with a counter that is provided with an engagement toothing, by means of which the drive part, which has a rotational axis, acts upon the counter wheel in order to realize its rotation, wherein the rotational axis extends outside the counter wheel, namely also with respect to a projection of the counter wheel in the direction of the central axis of the counter wheel. The cylindrically designed counter wheel therefore features the drive part on the outside, i.e. assigned to the surface, on which the readable characters are usually arranged. In this way, the counter wheel is provided with the drive part on one side in a quasi-projecting fashion. Otherwise, the counter wheel may on the other side be directly assigned to a window or a transparent part of the handheld device, in which it should be arranged. A drive part, the rotational axis of which extends outside the counter wheel, can advantageously act upon the counter wheel from outside. In a cylindrical or toroidal or generally curved design of the counter wheel, the convex (outer) side of the counter wheel can be used.
Other characteristics of the invention are respectively described and illustrated below in the description of the figures and the drawings, frequently in their preferred correlation with the already described concepts. However, they may also be significant in correlation with only one or multiple individual characteristics described or graphically illustrated herein or independently or in a different overall concept.
Each of the characteristics disclosed above particularly may also be realized in one of the other respective concepts and all above-described characteristics may even be combined in one object.
It is furthermore preferred that the engagement part is attached to the mounting part. In this case, the mounting part preferably not only serves for mounting the drive part, but also the engagement part that interacts with the drive part.
The engagement part particularly may be attached to the mounting part by means of a or the aforementioned return spring. The engagement part may be realized integrally with the return spring, particularly in one piece consisting of the same material.
In any case, the mounting part is preferably also realized with an integral mounting formation for the drive part, which consists of the same material.
The mounting part and the drive part may be jointly movable relative to the engagement part, which is stationary with respect to the housing, in order to carry out a counting process. If the engagement part is connected to the return spring as in the preferred embodiment, a certain motion of the return spring transverse to its deflecting motion may in fact occur as a result of the deflecting motion. However, the engagement part is preferably connected to or realized integrally with the region of the return spring, which is also in contact with the housing, particularly a bottom of the housing of the handheld device, in the relaxed state. In that respect, this region practically does not move, at least not vertically or in the deflecting direction of the return spring, but at best slightly in the form of a motion transverse to the deflecting direction during an actuation.
A locking part for acting upon the drive part may furthermore be attached to the mounting part. It is also preferred that the locking part is already realized integrally with the mounting part, particularly in one piece consisting of the same material. Consequently, the mounting part has assumed yet another function and thereby additionally contributes to the realization of a counter with the fewest individual parts possible.
The counter wheel may be realized cylindrically as already mentioned above and feature an engagement toothing, which is preferably realized on a lower peripheral edge during the intended use. Since the engagement toothing is preferably realized on the lower peripheral edge of the preferably cylindrical counter wheel, the remaining (outer) surface (toward the top) can be freely used for applying the readable characters.
The cylindrical design of the counter wheel, in which no additional installation parts are provided in the interior of the thusly formed cylinder body, is also advantageous with respect to the interaction with a receptacle of the handheld device, in which the pharmaceutical substances accommodated. It is preferred that only sections of the mounting part are located in the interior of the counter wheel. The receptacle is typically realized in the form of a so-called canister, which in a longitudinal cross section has a stepped bottom with a central pin-like projection, wherein a tubular valve part, from which the substance is ultimately discharged during an actuation, protrudes from said projection.
The cylindrical design of the counter wheel particularly may be realized in such a way that an upper end face of the cylinder body can be arranged such that it is assigned to the lower, outer step surface of the aforementioned receptacle. In order to be actuated by a user, the receptacle typically has to be pressed downward against a spring arranged in the receptacle itself such that the motion, which ultimately leads to the actuation of the counter, simultaneously takes place due to the pressure exerted upon the counter wheel or the mounting part accommodating the counter wheel, respectively.
Similarly, the mounting part is preferably realized cylindrically.
It is also preferred that the mounting part overlaps the counter wheel from inside in a longitudinal cross section. Consequently, the outer surface of the counter wheel is exposed. This outer surface preferably carries the aforementioned readable characters.
According to another detail, the drive part may preferably be realized in the form of a worm shaft with toothing projections. This means that a circumferential toothing is in fact provided, but this circumferential toothing on the drive part is realized on a helix that extends obliquely to a rotational axis of the drive part and helically around the rotational axis.
If the counter wheel and/or the mounting part are realized accordingly, the drive part is preferably arranged such that its rotational axis extends transverse to a central axis of the counter wheel and/or the mounting part, which is preferably a cylinder axis.
The engagement part preferably acts upon the drive part on the counter wheel side of the rotational axis of the drive part. Consequently, a very close application point for the force transfer from the driving part to the counter wheel is achieved. The described toothing projections particularly also serve for the interaction between the engagement part and the drive part, as well as the locking part.
The locking part preferably acts upon the drive part on the side of the rotational axis of the drive part, which faces away from the counter wheel. In this way, the drive part initially is acted upon on opposite sides—referred to the rotational axis of the locking part and the drive part. The aforementioned parts can simultaneously move toward one another without any risk of obstruction.
The locking part and the engagement part are preferably arranged such that they are directed oppositely. The free ends of the locking part and the engagement part are arranged such that they are directed toward one another. In this case, the locking part particularly may be arranged on the upper side and the engagement part may be arranged on the lower side—referred to the described installation state, in which the counter is acted upon by the receptacle from above.
The engagement part and/or the locking part are arranged outside the counter wheel or the mounting part in general—referred to a view from above or below, in which a central axis of the counter wheel and/or the mounting part forms a point. In other respects, the arrangement outside the mounting part refers to the fact that the connection for the engagement part, which—with reference to one embodiment—is realized by the return spring itself, or the connection for the locking part, which then insofar also form parts of the mounting part, already are considered as lying outside the mounting part to the extent, to which they are visible in the aforementioned view.
In the aforementioned view, the return spring may also laterally extend beyond the engagement part and/or the locking part.
The return spring itself is preferably realized in the form of a bow, particularly a closed bow. The bow has two ends that are fastened on the mounting part. The fastening regions, for example in the form of connecting points, may lie approximately opposite of one another referred to a diameter line of the preferably cylindrical mounting part and the cylinder defined by the mounting walls. They may also lie opposite of one another on a secant referred to a thusly formed circle of the cylinder. In the latter instance, the fastening regions or the connecting points are preferably arranged offset to the central axis in such a way that the central axis lies between the secant and the locking part and/or the engagement part, wherein this once again refers, for example, to the view from above, in which the central axis forms a point.
The counter wheel is preferably realized in the form of an integral cylinder part.
The invention is described in greater detail below with reference to the attached drawings that, however, merely show an exemplary embodiment. In these drawings:
A counter 1 consisting of a counter wheel 2, a mounting part 3 and a drive part 4 is described and illustrated below; see particularly
These few parts, preferably only three parts, are essential to this counter wheel. It is particularly important that the mounting part is realized integrally with additional functions and functional parts, preferably in one piece consisting of the same material.
The counter 1 can be arranged in a handheld device 5 of the type illustrated in principle in
The cross section according to
The handheld device 5 furthermore features a housing 7 that comprises a section, which extends vertically during the intended use and in which a receptacle 6 is accommodated, as well as a mouthpiece 8 that angularly protrudes from this vertical section, e.g. at a right angle or obtuse angle referred to a longitudinal axis of the vertical section. The mouthpiece 8 may be covered with a cap 9 when the handheld device is not in use.
The entire counter 1 is accommodated in the housing 7 of the handheld device 5.
According to
In this case, the mounting part 3 and the counter wheel 2 accordingly are jointly pressed downward against a return spring 12 that is preferably realized on the mounting part. While the mounting part and the counter wheel are pressed downward, the drive part 4 interacts with the counter wheel 1 in order to rotationally drive this counter wheel 1 about a central axis A thereof, which may also be a cylinder axis as discussed further below.
The described counter 1 particularly is not designed for individually counting each actuation of the handheld device 5. However, it may also be realized in the form of an individual counter. The counter preferably only displays a new numeral (completely) after a certain number of actuations, for example after 5, 10 or 20 respective actuations.
The counter wheel 2 apparently features corresponding readable characters 13, particularly on an outer circumferential surface of the preferably cylindrical counter wheel 2.
The characters 13 can be read through a window 30 in the housing 7.
The counter wheel 2 is mounted on the mounting part 3. To this end, the mounting part 3 engages behind the counter wheel 2 with mounting fingers 14 and/or a mounting wall 15 as illustrated in greater detail, e.g., in
Furthermore, the bottom 26 is preferably realized approximately at the height of the step surface 17. The bottom is preferably also realized such that it only extends on the inner side of the mounting wall and essentially perpendicular to the central axis A.
Snap-in fingers may also be realized in the mounting opening 27 in order to promote the potential mounting of the counter on the receiving/dispensing stub 11 of the housing of the device.
To this end, the mounting stub 11 apparently features a circumferential groove 29, into which such snap-in fingers can engage. In the illustration in
The lower side of the counter wheel 2 is realized with an engagement toothing 18. This engagement tooting makes it possible to act upon the counter 1 in order to realize its rotation.
The engagement toothing 18 is acted upon by the drive part 4.
The mounting part 3 is preferably also realized toroidal, particularly cylindrical, if applicable with different regions in a vertical direction of a cylinder axis, which preferably coincides with the central axis A. A functional section is preferably provided underneath the step surface. This functional section, which preferably also as an annular shape, particularly a cylindrical shape, is provided with one or more formations that can fulfill one or more functions. A mounting formation 25 is initially provided for mounting the drive part 4. It may consist of snap-in openings for an axis of the drive part 4. Rib-like counter formations 24 for the mounting in a housing of the handheld device are furthermore provided. In addition, the functional section features the connection of the return spring 12. This return spring may extend from a lower end face of the functional section. Referred to the side view according to
It is furthermore preferred that the return spring 12 has a closed bow-like design. In other respects (i.e. with consideration of these purposes without the return spring 12), two end regions of the bow are preferably realized such that they transform into the mounting part 3 at two different locations on the underside thereof.
According to another detail, the drive part 4 is realized in the form of a worm shaft, preferably a single-flight worm shaft. This is also illustrated, e.g., in
One respective driving projection 20, which may simultaneously also serve as a tooth for acting upon the engagement part 21, particularly can engage between two driving projections 20 and drive the counter wheel 2 during a rotation due to the helical or screw-like design.
The engagement part 21 is preferably realized on the return spring 12 and particularly consists of the same material as the return spring 12.
According to
The engagement part 21 may alternatively also be directly arranged on the housing 7 as illustrated in
According to
During an actuation of the handheld device, i.e. when the receptacle is pressed downward in the exemplary embodiment, the engagement projection 21 remains approximately stationary relative to the housing 7. If the engagement projection is integrally formed on or connected to the return spring 12, it may move slightly transverse to the central axis A as a result of the deflecting motion of the spring.
During an actuation of the handheld device, the engagement projection 21 encounters a driving projection 20 of the drive part 4 and causes a rotation of the worm shaft about the rotational axis D of the drive part 4.
A backward rotation of the drive part 4 is simultaneously prevented by means of a locking part 22. The locking part 22 also interacts with the worm shaft, particularly with the toothing projections 19 of the drive part 4 that form the helical design.
The drive part 4 interacts with the locking part 22 on the opposite side of the corresponding interaction of the drive part 4 with the engagement part 21—referred to a side view according to
The locking part 22 and the engagement part 21 are preferably directed oppositely. They may respectively consist of flat parts that extend in the direction of the central axis A and approximately parallel thereto. The engagement part 21 and/or the locking part 22 may also feature a hook-shaped formation on the upper side on the respective free end in order to promote the interaction with a driving projection 20.
According to
The preceding explanations serve for elucidating all inventions that are included in this application and respectively enhance the prior art independently with at least the following combinations of characteristics, namely:
A counter, which is characterized in that the mounting part is realized independently of the housing 7, and in that the drive part 4 is directly attached to the mounting part 3.
A counter, which is characterized in that the counter 1 features a return spring 12 for the retrodisplacement after an actuation, and in that the spring 12, which is realized separately of the drive part 4, features an engagement part 21 for interacting with the drive part 4.
A counter, which is characterized in that the rotational axis D extends outside the counter wheel 29, namely also with respect to a projection of the counter wheel 2 in the direction of the central axis A of the counter wheel 2.
A counter, which is characterized in that the engagement part 21 is attached to the mounting part 3.
A counter, which is characterized in that the engagement part 21 is attached to the mounting part 3 by means of a return spring 12.
A counter, which is characterized in that the mounting part 3 and the drive part 4 are jointly moved relative to the engagement part 21, which is stationary with respect to the housing 7, in order to carry out a counting process.
A counter, which is characterized in that a locking part 22 for acting upon the drive part 4 is attached to the mounting part 3.
A counter, which is characterized in that the counter wheel is realized cylindrically and/or with an engagement toothing 18, which is formed on a lower peripheral edge during the intended use.
A counter, which is characterized in that the drive part 4 has a rotational axis D, and in that the rotational axis D extends transverse to a central axis A of the counter wheel 2.
A counter, which is characterized in that the engagement part 21 acts upon the drive part 4 on the counter wheel side of the rotational axis D.
A counter, which is characterized in that the locking part 22 acts upon the drive part 4 on the side of the rotational axis D of the drive part 4, which faces away from the counter wheel 2.
A counter, which is characterized in that the locking part 22 and the engagement part 21 are arranged such that they are directed oppositely.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2014 118 325.8 | Dec 2014 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2015/078170 | 12/1/2015 | WO | 00 |
