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(11) | EP 1 063 386 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
Operating mechanism for shutters of the venetian type Betätigungsvorrichtung für Lamellenjalousien Dispositif de manoeuvre pour store vénitien |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The present invention relates to a gear for handling a shutter of Venetian type. More particularly, the invention is related to a shutter of Venetian type, having several independent sheets with properties of changing orientation and covering or reducing the exposed area of the window itself by coupling or extending the sheets. This type of gear has been designed to achieve an easy handling and a solid structure for the manipulation.
BACKGROUND OF THE INVENTION.
[0002] As known, shutters of the Venetian type contain several parallel sheets that can be coupled or extended with a string through holes at the end of the sheets; upon pushing from the lower sheet, it proceeds to rise the unit with the parallel ones, thus pushing the remaining sheets to the desired level. The directional angle of the sheets are also regulated for luminosity from the maximum allowable one, down to their closing when the sheets became in contact at their borders or to the marginal areas.
[0003] The inventor of this patent application is the owner of the Spanish utility model number 9702192, wherein it was described a gear for directional and stopping of a mechanism for the above mentioned shutter. In said utility model, the axis of the gear has a tubular shape and is fixed in the upper portion using an articulation of the "cardan" type to a tubular pinion which remains in an axial prolongation through an intermediate system of dentate wheels. The dentate wheels have an angular movement of the basement for the sheets, due to the tubular pinion. In such an axis, the pass-through for the strings of opening and closing of the shutter, can be moved in an axial angle against an applied force of a spring attached to Y shape attachment ending with a striated rolling wheel. This rolling wheel acts as a stopping mechanism for the string when pushing, with the effect of the mentioned spring and a fixed roll. The stopping mechanism that includes the two striated rolls, maintains the string blocked and can be separated only when it is activated below the commanding wheel. The above solution, is valid from a theoretical point of view, but is most problematic in practice due to the transmission system from the tubular pinion to the splitting that activates the angular movement of the sheets, in view of the following:
(a) When considering the complexity of the structure of the intermediate wheels mechanism, the available space is significantly reduced and thus the dimensions of the wheels can not be increased and as a consequence, the user must apply a considerable force.
(b) The above mentioned limited space does not allow the use of strong wheels which prolong the life of the mechanism and will reduce troubleshooting.
[0004] Another winding mechanism is known from US-A-5 465 775. Here, the cord lock of rather complicated construction is placed in the handle of the stick.
BRIEF DESCRIPTION OF THE INVENTION.
[0005] The invention relates to a mechanism for the manipulation of shutters of the Venetian type according to claim 1. It comprises a tubular stick wherein at the upper portion and through an axis of the "cardan" type, being somehow prolonged, ending with a tubular pinion thus allowing the pass through of strings.
[0006] For raising and lowering the sheets that can be stopped, there are required two rolls: one fixed and the second mobile, which are towed against the force produced by a spring through the tubular stick. In this manner, the tubular pinion transmits the movement of the stick of the Y shape that does change the angle of the sheets, being characterized by the fact that the tubular pinion is attached directly to another pinion of a longer diameter. This pinion is included in the axis and attached thereto is a torque that works on the exit of the pinion, thus protruding the Y shape that enables the angular movement of the sheets.
DESCRIPTION OF THE FIGURE.
[0007] Figure 1, illustrates in perspective a gear for handling shutters of the Venetian type according to the invention in which the outer shell is sectioned in its structure.
(a) As can be noticed, there is a commanding wheel (1) with a tubular configuration which includes a string (2) for opening and closing the sheets. This commanding wheel in its upper end does attach a cardan" (3) articulation to which is linked, in a short portion (4),which is joined to a pinion (5) in the outer shell (6) of the gear.
(b) The pinion (5) has a tubular configuration for the inclusion of the strings (2) directed to two striated rolls (7) and (8) ; the first linked to a Y shaped attachment (9) which tends to go up due to a spring (not shown in the Figure); the spring can be contracted by tracking over the commanding wheel (1) and the above two striated rolls act as a braking system for the strings which regulate the sheets in different position at a desired high of the lower portion of the shutter.
[0008] In view of the above basic structure, the characteristics of the invention are based on the fact that the tubular pinion (5) fits with another pinion of a bigger diameter (10) which is linked to an axis (11) protruded in a torque (12).
DETAILED DESCRIPTION OF THE INVENTION
[0009] The structure of the invention does resolve the above mentioned problems. In a concrete way, and basically using the previous explained mechanism, the characteristics of the new system is based upon the fact that the string for commanding the movement pass through the tubular pinion, fitting directly with the pinion attached to the Y shaped attachment that makes the angular movement of the sheets; if we consider that no intermediate transmission is involved then, the structure becomes smooth with stronger pinions ending with a pinion of extended diameter that considerably reduces the force needed to be implemented by the user.
[0010] From this basic and conventional structure, the characteristics of the invention is based upon the fact that the tubular pinion (5) fits with a pinion of a considerable diameter (10) which is linked to an axis (11) protruded in a (12) transferring the movement to the pinion (13) that moves the sheets and regulates the direction thereof.
[0011] It can be easily understood from the Figure, that the exit pinion (10) has a considerable longer diameter than the tubular pinion (5) thus enabling the transmission of the movement to the Y shape which regulates the angular movement of the sheets with less effort to the user.
[0012] The existence of two pinions as a way of transmission, allows the usage of a stronger unit due to the additional available space. These facts prolongs the life of the mechanism and diminishes the number of anticipated problems. Finally, the simplification of the transmission (due to reduced number of parts) makes this unit lower in cost and reduces problems in the transmission.
[0013] It should be clear that the description of the embodiments and attached Figure as set forth in this specification serves only for a better understanding of the invention, without limiting its scope as covered by the following Claim. It should also be clear that a person in the art, after reading the present specification could make adjustments or amendments to the attached Figures and above described embodiments that would still be covered by the following Claim.
1. A mechanism for the manipulation of shutters of the Venetian type which comprehends
a tubular stick (1) to which at the upper portion and through an axis of the "cardan"
type (3) is somehow prolonged, ending with a tubular pinion (5) allowing the pass
through of strings (2) for raising and lowering the sheets and ending with using two
rolls (7,8) for stopping strings, which is towed against the force produced by a spring
through the tubular stick (1) attached to an Y shape attachment (9) ending with one
of said rolls (7); the tubular pinion (5) transmit the movement of the stick (1) that
changes the angle of the sheets, characterized by the fact that the tubular pinion (5) attaches directly to a pinion of longer diameter
(10) which is included in the axis and attached thereto a torque (12) that work on
the exit pinion protruding the Y shape that enables the angular movement of the sheets
wherein the whole system allows the two described pinions an additional available
space with a multiplied transmission thus requiring less effort by the user through
the commanding stick.
1. Mechanische Vorrichtung zur Bedienung von Stab-Jalousien welche einen röhrenförmigen
Stab (1) umfasst, der am oberen Teil in irgend einer Weise durch einen Dreher vom
Typ eines Kardangelenks (3) verlängert ist, welcher mit einem röhrenförmigen Zahnrad
(5) endet, das ein Hindurchführen von Strängen (2) zum Heben und Senken der Lamellen
erlaubt und mit dem Gebrauch von zwei Rollen (7, 8) zum Halten der Stränge endet,
welche gegen die Kraft gehängt sind, die erzeugt wird durch eine Feder durch den röhrenförmigen
Stab, der mit einer Y-förmigen Verbindung (9) verbunden ist, welche mit einer der
Rollen (7) endet, das röhrenförmige Zahnrad (5) die Bewegung des Stabes (1), welche
den Winkel der Lamellen verändert, überträgt, was durch die Tatsache gekennzeichnet
ist, dass das röhrenförmige Zahnrad (5) direkt mit einem Zahnrad mit grösserem Durchmesser
(10) verbunden ist, welches mit dem Dreher verbunden ist und ein Drehmoment (12) umfasst,
welches auf das Ausgangszahnrad, das die Y-Form verlängert, einwirkt, was die Winkelbewegung
der Lamellen ermöglicht, wobei das gesamte System den beiden beschriebenen Zahnrädern
mehr verfügbaren Raum mit einer vervielfachten Übersetzung einräumt und somit vom
Benutzer weniger Kraftanwendung durch die Kurbelbedienung erfordert.
1. Mécanisme destiné à la manipulation de stores du type vénitien qui comprend une baguette
tubulaire (1) où la partie supérieure est légèrement prolongée grâce à un axe du type
"à cadran" (3), se terminant par un pignon tubulaire (5) permettant le passage de
cordons (2) destinés à élever et abaisser les lames et se terminant par l'utilisation
de deux rouleaux (7, 8) destinés à arrêter les cordons qui sont tendus en s'opposant
à la force produite par un ressort à travers la baguette tubulaire fixée à une fixation
en forme de Y (9) se terminant par l'un desdits rouleaux (7), le pignon tubulaire
(5) transmet le déplacement de la baguette (1) qui modifie l'angle des lames, caractérisé par le fait que le pignon tubulaire (5) se fixe directement à un pignon d'un diamètre plus grand
(10) qui est inclus dans l'axe et recevant un couple (12) qui agit sur le pignon de
sortie faisant dépasser la forme en Y, ce qui permet le déplacement angulaire des
lames, où le système global donne aux deux pignons décrits un espace disponible supplémentaire
avec une transmission multipliée, en nécessitant moins d'effort de l'utilisateur par
l'intermédiaire de la baguette de commande.