[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. 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.