Offset parasol

Abstract

The invention relates to an offset parasol comprising a support pole arranged on a base and bearing a shading fabric at the end of an arm hinged to a shuttle that is arranged so as to slide along the support pole, and a mechanical group, rigidly attached to the shuttle or mounted on a fixed point of the support pole is arranged so as to control the deployment of the shading fabric, the upward or downward movement of the shuttle, the inclination of the shading fabric, or the rotation of the support pole on its base, all by means of one and the same crank.

Description

CANTILEVER UMBRELLA

[0001] The present invention relates to an offset parasol, also called an offset or cantilever parasol.

[0002] Cantilever parasols allow shade to be cast over a fairly large area without cluttering the shaded area itself. Thus, while a conventional parasol has a central pole generally starting from the centre of the parasol or its deployed shade cloth and extending essentially vertically to a support surface, a cantilever parasol has an offset support pole and carries the deployable shade cloth in the manner of an umbrella by means of ribs, at the end of an arm articulated on a shuttle sliding along the support pole, said articulated arm also forming a so-called main rib of the shade cloth. The upward movement of the shuttle on the support pole unfolds the articulated arm from the folded position against the support pole to an unfolded position.The downward movement of the shuttle, in turn, folds the articulated arm carrying the shade cloth from the unfolded position to the folded position, against said support mast. To do this, the articulated arm on the shuttle is also held by a return arm articulated at a point of attachment to the support mast, a point distant from the shuttle. Furthermore, a crank controlling a cable winding mechanism is arranged on said shuttle, a cable being connected to the assembly center of the support ribs of the shade cloth, and passing through the main rib (or articulated arm) and being windable on or unwindable from the winding mechanism of the shuttle. Winding the cable has the effect of unfolding the ribs and thus the shade cloth; unwinding the cable allows the cloth to be folded. Patent US-8104492 describes an example of such parasols.In certain embodiments, said main rib also includes a mechanism causing it to rotate around its longitudinal axis so as to control the inclination of the shade cloth of the parasol.

[0003] The purpose of the present invention is to provide various improvements to offset parasols, to be taken individually or in combination.

[0004] The present invention aims to provide an offset parasol comprising a support mast arranged on a base and carrying a shade cloth at the end of an arm articulated on a shuttle arranged to slide along the support mast, said shade cloth being deployable in the manner of an umbrella by means of ribs, said articulated arm also forming a rib called the main rib of the shade cloth, the upward movement of the shuttle on the support mast being intended to unfold the articulated arm from a folded position against the support mast to an unfolded position, the downward movement of the shuttle, in turn, being intended to fold the articulated arm carrying the shade cloth from the unfolded position to the folded position, against said support mast, said articulated arm on the shuttle being further held by a return arm articulated on said arm and at a point of attachment to the support mast, a point distant from the shuttle, said parasol comprising at least a first mechanical control group comprising at least (i) a first axis on which is arranged a cable winding spool or belt drive pulley and a first gear wheel, (ii) a second axis comprising a second gear wheel and a means for driving a rotational movement, and (iii) a crank arranged so as to rotate on its axis a gear means interacting either with the first gear wheel of the first axis, or with the second gear wheel of the second axis;the rotational movement of the winding spool or the drive pulley being designed for winding or unwinding a cable or controlling a belt used for deploying the shade cloth or for winding or unwinding a cable or controlling a belt used for the upward or downward movement of said shuttle, the means for driving the rotational movement being designed to drive the rotation of at least part of the articulated arm or main rib on its longitudinal axis or to unlock or block or drive the rotation of the support mast relative to its base, the rotation functions of the first axis and the second axis being controlled alternately by a single crank.;

[0005] In order to be able to interact with either axis, the crank is advantageously associated with a cam activated by a reversing movement of the crank, and the cam is designed to move in a translational movement along an axis the gear means arranged to interact either with the gear wheel of the first axis or with the gear wheel of the second axis.

[0006] The translation axis of said gear means arranged to interact either with the gear wheel of the first axis or with the gear wheel of the second axis advantageously corresponds to the first axis.

[0007] It is understood that when no mechanical block is provided for raising or lowering the shuttle on the support mast, the shuttle can be moved manually along the support mast. This type of shuttle is absolutely conventional and known to those skilled in the art. When the mechanical control unit is not used to move the shuttle, any other known means for moving this shuttle can also be used.

[0008] The invention provides an offset parasol equipped with a particularly compact mechanical control unit which is easy for the operator to use and which can easily be housed in an offset parasol shuttle.

[0009] Furthermore, the user only needs to control one crank to operate two functions, whereas in certain known embodiments, several cranks are provided; which clutters up the control assembly and increases its cost. In certain known embodiments, the user must disengage the control crank from one of these functions to re-engage it on another axis in order to control the second function; with the risk of losing the crank.

[0010] As explained below, such a mechanical control unit can also be mounted on the support mast at a fixed point. Several of these mechanical control units can also be provided as required in order to easily control various functions of the parasol with reduced effort.

[0011] According to an advantageous embodiment of the mechanical control unit, the two axes are essentially parallel.

[0012] It is understood that the person skilled in the art will size the winding spool or the drive pulley so that it is suitable for controlling the desired function. That is to say, it must be able to wind a length of cable or drive a belt with a suitable displacement.

[0013] The means for driving the rotational movement of the second axis advantageously consists of a worm screw arranged on said second axis. This worm screw can interact with a toothed wheel which is controlled in rotation by said worm screw, along an axis transverse to said second axis. Given the reduction or gear reduction of application in this type of arrangement, the force required for the rotation of the toothed wheel by means of the worm screw is reduced. Furthermore, in the opposite direction, the force required for the rotation of the toothed wheel to drive the worm screw is such that any action in the opposite direction is almost impossible, thus preventing this movement from occurring under the effect of weight or wind for example. We speak of an irreversible reducing effect. This arrangement therefore makes it possible to judiciously block a position, such as for example the angular position of the support mast relative to its base or the inclination of the shade cloth.

[0014] According to a preferred embodiment, said mechanical group is integral with the shuttle, and the rotational movement of the winding reel or the drive pulley is designed for winding or unwinding a cable or driving a belt used for deploying the shade cloth, and the means for driving the rotational movement is designed to cause the rotation of at least part of the articulated arm or main rib on its longitudinal axis.

[0015] In this case, the means for driving the rotational movement of the main rib around its longitudinal axis consists of a worm screw which drives, by means of a toothed wheel, a spool for winding / unwinding a cable or a belt drive pulley, for example a toothed wheel, cable or belt otherwise connected to a return pulley driving, via a gear, a toothed wheel mounted on an axis corresponding essentially to the longitudinal axis of the main rib. Rotation in one direction or the other of said second axis, by means of the crank in the corresponding position, thus makes it possible to orient or tilt the shade cloth in one direction or the other.

[0016] Alternatively, it may also be provided that the means for driving the rotational movement of the main rib around its longitudinal axis comprises a flexible shaft connected, on the one hand, directly or indirectly to a toothed wheel interacting with the worm screw of said second axis and, on the other hand, directly or indirectly to the main rib. Advantageously, this latter connection of the flexible shaft to the main rib is made to a drive head secured to the main rib and rotating in a sleeve connecting said main rib to the shuttle. This rotational movement is advantageously limited in each direction for safety reasons to an angle of the order of 25 to 65 degrees. Rotation in one direction or the other of said second axis, by means of the crank in the corresponding position, thus makes it possible to tilt the shade cloth in one direction or the other.

[0017] An offset parasol as described above may also be combined with various accessories and auxiliaries known per se. In particular, it may comprise, in addition to one or more mechanical control units, a means for controlling the rotation of the support pole on its axis and therefore the orientation of the parasol. In this case, the offset parasol may comprise, in or on the base of the support pole, a mechanism for rotating the support pole relative to said base, and on its support pole or on its shuttle a handle or a lever which is designed to act respectively on a rod or rack housed along the support pole, so as to move it against the force of a return spring in order to release with its lower end a locking lug of the rotation mechanism.

[0018] Advantageously, said handle or lever is arranged on the shuttle. In this case, since the shuttle can take various positions along the support mast, it is preferable to work with a push rack which allows the aforementioned interaction at any level of the shuttle on the support mast, the shuttle and the rack being in register.

[0019] Preferably, the movement against the force of a return spring, of the push rod or rack, intended to unlock with its lower end a locking lug of the rotation mechanism is a downward movement.

[0020] Furthermore, in order to further increase user comfort, said handle or lever may, in addition, be bi-functional and perform the function described above in association with locking the position of the shuttle on the support mast. This function is well known and may, for example, consist of driving a lug into a rack fixed relative to the support mast or tightening. In the case of using a fixed rack, the latter is in register with the pusher rack in the rest position.

[0021] The embodiments using rods or racks are particularly suitable for hollow support masts consisting of a substantially U-shaped profile comprising at the ends of the branches of the U rod or rack housing chambers and supports serving as a sliding or rolling surface for the shuttle.

[0022] According to another embodiment of the invention, said first mechanical group is mounted on the support mast in a fixed position, and the rotational movement of the winding spool or the drive pulley is designed for winding or unwinding a cable and / or one or more belts, possibly notched, for opening and closing the parasol and the means for driving the rotational movement is designed to cause the pivoting of at least part of the articulated arm or main rib on its longitudinal axis. This embodiment can be particularly advantageous, insofar as the shuttle is particularly simple, compact and light.

[0023] Another embodiment provides that a mechanical control group is mounted on the support mast in a fixed position, and that the rotational movement of the winding spool or drive pulley is designed for winding or unwinding a cable and / or one or more belts for controlling the upward or downward movement of the shuttle while the means for driving the rotational movement is designed to cause the rotation of the support mast relative to its base. In this case, said cable or belt(s) or a combination thereof is connected to said winding spool or drive pulley and to the shuttle via a fixed point on the support mast, located beyond the shuttle.

[0024] In this embodiment, the means for driving the rotational movement consists of a worm screw which drives, by means of a toothed wheel (i) a shaft which may be flexible and connected to the base or (ii) a stirrup controlling a push rod or rack housed along the support mast, so as to move it against the force of a return spring in order to unlock with its lower end a locking lug of a rotation mechanism housed in the base, thus allowing manual rotation of the support mast.

[0025] This mechanical group can be combined with a second mechanical group associated with the shuttle or with a second mechanical group fixed on the support mast, each mechanical group obviously performing different functions. Such forms of execution further improve the comfort of use for the operator.

[0026] In the embodiment of two mechanical control groups in a fixed position on the support mast, the two are advantageously arranged one above the other with the cranks arranged on opposite sides.

[0027] It is understood that the person skilled in the art will adapt the position of the mechanical group(s) so as to guarantee the comfort of users of various sizes.

[0028] The various improvements described are intended to provide greater comfort to users. They also allow for the manufacture of more aesthetically pleasing cantilever umbrellas. Reducing the number of cranks and levers by providing multifunctional cranks and levers also reduces manufacturing and assembly costs.

[0029] The invention is described in more detail below with the support of examples of execution of the offset parasol of the invention, with reference to the appended figures in which:

[0030] - Figure 1 is a schematic representation of an offset parasol

[0031] - Figure 2 shows a mechanical group for controlling the deployment of the shade cloth and its pivoting in the deployment control position (Figure 2A) and in the main rib rotation control position (Figure 2B);

[0032] - Figure 3 shows an example of assembly of the return arm on the main rib which can be rotated on its longitudinal axis in order to tilt the shade cloth;

[0033] - Figure 4 is a perspective and exploded view of a reversible control crank intended for a mechanical control group according to Figure 2;

[0034] - Figure 5 shows the assembly of a flexible arm to the main whale; and

[0035] - Figure 6 shows an example of a control for blocking the shuttle movement and a control for unlocking the rotational movement of the support mast on its longitudinal axis, in the locked position (figure 6A) and in the unlocked position (figure 6B).

[0036] - Figure 7 shows an example of the execution of a support mast head;

[0037] - Figure 8 shows a shuttle equipped with a mechanical control unit; and

[0038] - Figure 9 shows a set of two mechanical control groups assembled into a single block intended to be fixed to the support mast.

[0039] In the figures, identical or similar references designate identical or similar elements.

[0040] An offset parasol as referred to in this description is shown schematically in Figure 1. This type of parasol 1 comprises a support mast 30 arranged on a base 32. In order to allow the rotation of the support mast 30 around its longitudinal axis relative to the support base 32, a rotation mechanism 33 can be provided arranged on or inside the support base 32. The support mast 30 is offset and carries by means of ribs a shade cloth (not shown) which can be deployed in the manner of an umbrella, at the end 51 of an arm 50 articulated on a shuttle 70 sliding along the support mast 30, said articulated arm 50 also forming a so-called main rib of the shade cloth. The upward movement of the shuttle 70 on the support mast 30 unfolds the articulated arm 50 from the folded position against the support mast 30 to an unfolded position. Figure 1 shows an intermediate shuttle position in dotted lines.The downward movement of the shuttle 70, in turn, folds the articulated arm 50 carrying the shade cloth from the unfolded position to the folded position, against said support mast 30. To do this, the arm 50 articulated on the shuttle 70 is also held by a return arm 51 articulated on the main rib 50 at a point of attachment 52 to the support mast 30, a point distant from the shuttle 70.

[0041] According to a first embodiment of the invention, the shuttle 70 comprises a mechanical control group 100 comprising at least a first axis 102 on which is arranged a winding reel 104 of shade cloth deployment cable and a gear wheel 106, a second axis 110 comprising a gear wheel 112 and a worm screw 114 arranged to drive a transverse axis (not shown) in rotation. The latter can rotate a drive pulley, for example a toothed wheel, of a belt for controlling the rotational movement of the main whale 50 around its longitudinal axis or a flexible shaft for controlling the rotational movement of the main whale around its longitudinal axis, and a crank 116 arranged so as to rotate on an axis a toothed wheel 120 interacting either with the gear wheel 106 of the first axis 102, or with the gear wheel 112 of the second axis 110.

[0042] Such a crank 116 is shown in Figure 4, in an exploded perspective view. It is advantageously reversible by rotation around an axis 120 distant from the crank handle 122. Said axis 120 comprises a cam 124 which controls a translational movement of the toothed wheel 120 along its axis of rotation, in order to make it interact either with the gear wheel 106 (Figure 2A), or with the gear wheel 112 (Figure 2B). The user thus controls either the opening / closing of the deployable shade cloth, or the pivoting of said cloth. According to the example of Figure 2, the translational axis of said toothed wheel 120 arranged to interact either with the gear wheel 106 of the first axis 102, or with the gear wheel 112 of the second axis corresponds to the first axis 102.

[0043] To control the opening / closing of the shade cloth, a cable is arranged, on the one hand to the pulley 104, on the other hand to a mechanism for opening / closing the shade cloth not shown and known per se, passing through the main rib 50. Winding said cable on the pulley 104 deploys the support ribs of the shade cloth in the manner of an umbrella. Unwinding the cable from said pulley 104 allows the shade cloth to be folded. It is, of course, possible to replace the cable with one or more belts, possibly notched, or a cable-belt combination, and the reel with a drive pulley.

[0044] For controlling the inclination of the shade cloth, the mechanical group of Figure 2 comprises a worm screw 114 driving a toothed wheel arranged on a shaft transverse to that of the worm screw 114 and thus a reel for winding a cable or a drive pulley for a belt controlling via a return pulley 305 a belt 303 (see Figure 3) or a cable, said return pulley 305 being furthermore connected, for example by a worm screw 304, to a toothed wheel 301 mounted on an axis corresponding essentially to the longitudinal axis of the main rib 50a, 50b. The rotation in one direction or the other of said second axis 110, by means of the crank 116 in the corresponding position, thus makes it possible to tilt the shade cloth in one direction or the other.This embodiment makes it possible to place the control of the inclination of the shade cloth at the location of the articulated junction between the main rib 50 and the return arm 51 and avoids complicated mounting on the shuttle. The belt 303 is advantageously led into or along the support mast 30 and then into or along the return arm 51.

[0045] The 302 cable for opening the shade cloth can also be led in this way, i.e. into or along the support mast, then into the return bar and then into the main rib to the centre of the parasol.

[0046] While the embodiment of Fig. 3 shows a technical solution for the rotation of the main whale 50b by means of a toothed wheel mounted on the longitudinal axis of said main whale 50b rotated in one direction or the other by a worm screw 304 associated with a winding reel or a toothed wheel 305 driven respectively by a cable or a transmission belt 303 through the return arm 51 and the support mast 30 to the winding reel or toothed wheel associated with the crank 116 in the corresponding position, a variant shown in Figure 5, shows a different technical solution in which the means for driving the rotational movement of the main whale 50 around its longitudinal axis comprises a flexible shaft 350 connected, on the one hand, to the axis of a toothed wheel interacting with the worm screw 114 and, on the other hand, directly or indirectly to the main whale 50. Advantageously, this latter connection of the flexible shaft to the main whale 50 is made to a drive head 355 secured to the main whale 50 and rotating with a limited amplitude in a connecting sleeve 360 ​​of said main whale 50 to the shuttle 70. This variant has proven to be quite comfortable for the user.

[0047] Those skilled in the art will be able to determine the inclination of the axis of the toothed wheel interacting with the worm screw 114 so as to reduce the bending of the flexible shaft in order to maintain its functionality and reliability.

[0048] The embodiment described above may further comprise on the shuttle 70 a handle or lever 501 which secures the shuttle 70 in its position along the support mast 30. As can be seen by way of example in Figure 6 (A and B), the offset parasol 1 comprises in or on the base 32 of the support mast 30 a rotation mechanism 33 for the support mast 30 relative to said base 32. As can be seen in Figure 6A, a lug 609 extends into the rotation mechanism 33 in order to lock it.The handle or lever 501 mounted on the shuttle 70 (see Figure 8) is designed to move downwards a rack 605 housed along the support mast 30, preferably inside it, by means of a tilting yoke 620 (see Figures 6A and 6B and Figure 8, against the force of a return spring, in order to release by a tilting movement with its lower end 607 a locking lug 609 from the rotation mechanism 33 (see Figure 6B), thus allowing manual rotation of the support mast on its base 32. Since the shuttle 70 is arranged in a slidable manner along the support mast 30, a rack is provided which allows the aforementioned interaction at any level of the shuttle 70 on the support mast 30.

[0049] Said handle or lever 501 may, furthermore, be bi-functional and perform the function described above in association with locking the position of the shuttle 70 on the support mast 30. This function is well known and may, for example, consist of a lug 617 being pushed into a rack 615 or a clamping.

[0050] The improvements described are particularly suitable for hollow support masts 30 consisting of a substantially U-shaped profile comprising at the ends of the branches of the U rod or rack housing chambers 605 and supports serving as a sliding or rolling surface for the shuttle 70 (see in particular Fig. 7 and Fig. 9). The shuttle 70 shown in Figure 8 is an example of a shuttle equipped with a mechanical control unit as described above and intended for rolling by means of rollers 630 in a profiled support mat 30 having a substantially U-shaped cross-section.

[0051] Figure 7 shows an exploded view of the upper part of the support mast 30. It also shows the return arm 51 advantageously articulated to the support mast at this location. It also advantageously houses a direction change pulley (380, 385) (i) of the cable or belt or a combination of the two 302 intended to control the deployment of the shade cloth, and (ii) of the cable or belt or a combination of the two 303 intended to control the pivoting movement of the main rib.The latter 303 is advantageously a toothed belt controlled by a drive pulley mounted on the shaft of the toothed wheel interacting with the worm screw 114, and passes from the mechanical control group 100 of the shuttle 70 into the support mast 30 to be returned to the location of the articulation of the return arm 50, in the latter by means of a pulley 385 and interact with the return pulley 305 to thus control the rotation of a worm screw 304 which interacts with a toothed wheel 301 which itself drives the pivoting of the main whale 50.The cable 302 intended for controlling the deployment of the shade cloth is fixed in a windable / unwindable manner to the winding reel 104 of the mechanical control group 100 housed in the shuttle 70, passes from the mechanical control group 100 into the support mast 30 to be returned to the location of the articulation of the return arm 50 in the latter by means of a pulley 380 and then into the main rib to extend to the center of the parasol in order to control the opening and closing of the parasol in a known manner.This cable 302 can be replaced by a belt controlled by a drive pulley 104 of the mechanical control group 100; belt which passes from the mechanical control group 100 into the support mast 30 to be returned to the location of the articulation of the return arm 50 in the latter by means of a pulley 380 and then into the main rib to extend to the center of the parasol in order to control the opening and closing of the latter in a known manner. Figure 7 also shows assembly means, such as bolts, nuts, intermediate elements, shafts or rotation shaft elements materializing the axes of rotation, as well as covering elements such as crates, and other mechanical elements; those skilled in the art will easily identify them and easily determine their function without the present description expressly mentioning them.

[0052] According to another embodiment of the invention, at least one mechanical control group 100 can be arranged on the support mast 30 in a fixed position. Figure 9 shows a set of two mechanical control groups 100 and 1100 intended to be arranged at a fixed location on the support mast 30. The first mechanical group 100 comprises a winding reel 104 of a drive cable or pulley 104 of a belt, reel or pulley whose rotational movement is designed for opening and closing the parasol. This cable is fixed in a windable / unwindable manner to the winding reel 104 of the mechanical control group 100 fixed to the support mast 30, passes from the group control mechanism 100 in the support mast 30 to be returned to the location of the articulation of the return arm 50 in the latter by means of a pulley 380 and then in the main rib to extend to the center of the parasol in order to control in a known manner the opening and closing of the parasol. The first mechanical group 100 comprises a worm screw 114 mounted on an axis 110, interacting by means of a toothed wheel with a control pulley of a belt which passes from the mechanical control group 100 of the shuttle 70 into the support mast 30 to be returned to the location of the articulation of the return arm 50 in the latter by means of a pulley 355 and interacting with the return pulley 305 to control the rotation of a worm screw 304 which interacts with a toothed wheel 301 which itself causes the pivoting of the main whale 50. The cable can be replaced by a belt and the winding reel by a drive pulley.The second mechanical control group 1100, in this case also in a fixed position on the support mast 30, comprises a reel for winding or unwinding a cable or a pulley for driving a belt for controlling the upward or downward movement of the shuttle (70), and a means for driving the rotational movement to release or control the rotation of the support mast (30) relative to its base (32). To do this, the worm screw of the mechanical group 1100 interacts with a toothed wheel whose rotation axis interacts with a possibly flexible shaft connected to the base 32. Alternatively, the worm screw of the mechanical group 1100 interacts with a toothed wheel whose axis interacts with a tilting bracket 620 controlling a rod housed along the support mast 30 so as to move it against the force of a return spring in order to unlock with its lower end 607 a locking lug 609 of the rotation mechanism 33.

[0053] This form of execution is particularly advantageous since it is very comfortable for the user. The user has a control block at a fixed height whose controls require only reduced effort. He does not have to handle the shuttle to raise it, to lock it, or to carry out other commands.

[0054] Alternatively, one mechanical control group can be housed in the shuttle and another fixed in position on the support mast, the various functions being distributed as above in the case of two fixed mechanical groups.

[0055] Various figures show conventional assembly elements which are not all described and / or commented on in detail here but which are part of the knowledge of those skilled in the art and are shown for the sake of clarity.

Claims

Claims 1. Offset parasol (1) comprising a support mast (30) arranged on a base (32) and carrying a shade cloth at the end (51) of an arm (50) articulated on a shuttle (70) arranged to slide along the support mast (30), said shade cloth being deployable in the manner of an umbrella by means of ribs, said articulated arm (50) also forming a so-called main rib of the shade cloth, the upward movement of the shuttle (70) on the support mast (30) being intended to unfold the articulated arm (50) from a folded position against the support mast (30) to an unfolded position, the downward movement of the shuttle (70), in turn, being intended to fold the articulated arm (50) carrying the shade cloth from the unfolded position to the folded position, against said support mast (30), said arm (50) articulated on the shuttle (70) being further held by a return arm (51) articulated on said arm (50) and at a fixing point (52) to the support mast (30),point distant from the shuttle (70), characterized in that said parasol comprises at least a first mechanical control group (100) comprising at least (i) a first axis (102) on which is arranged a cable winding spool (104) or a belt drive pulley (104) and a first gear wheel (106), (ii) a second axis (110) comprising a second gear wheel (112) and a drive means (114) for a rotational movement, and (iii) a crank (116) arranged so as to rotate on its axis a gear means (120) interacting either with the gear wheel (106) of the first axis (102), or with the second gear wheel (112) of the second axis (110); the rotational movement of the winding spool or drive pulley (104) being designed for winding or unwinding a cable or driving a belt for deploying the shade cloth or for the upward or downward movement of said shuttle,the means for driving the rotational movement being designed to drive the rotation of at least part of the articulated arm or main rib (50) on its longitudinal axis or to unlock or block or drive the rotation of the support mast (30) relative to its foot, the rotation functions of the first axis (102) and of the second axis (110) being controlled alternately by a single crank (116)., 2. Parasol according to claim 1 characterized in that said mechanical group (100) is integral with the shuttle (70), in that the rotational movement of the winding reel (104) or of the drive pulley (104) is designed for winding or unwinding a cable or driving a belt used for deploying the shade cloth and in that the means for driving the rotational movement is designed to cause the rotation of at least part of the articulated arm or main rib (50) on its longitudinal axis.

3. Offset parasol according to claim 2 in which the means for driving the rotational movement of the main rib (50) around its longitudinal axis consists of a worm screw (114) which drives, by means of a toothed wheel, a winding / unwinding spool of a cable or drive pulley of a belt, said cable or said belt being further arranged to rotate a toothed wheel (301) mounted on an axis corresponding essentially to the longitudinal axis of the main rib (50).

4. Offset parasol according to claim 2 wherein the means for driving the rotational movement of the main rib (50) around its longitudinal axis comprises a flexible shaft (350) connected, on the one hand, directly or indirectly to a toothed wheel interacting with a worm screw (114) mounted on said second axis (110) and, on the other hand, directly or indirectly to the main rib (50).

5. Offset parasol according to claim 2 wherein the crank (116) is associated with a cam (124) arranged to be activated by the reversing movement of the crank, and said cam (124) is designed to move in a translational movement along an axis the toothed wheel (120) arranged to interact either with the gear wheel (106) of the first axis (102), or the second gear wheel (112) of the second axis (110).

6. Parasol according to claim 5 wherein the translation axis of said toothed wheel (120) arranged to interact either with the gear wheel (106) of the first axis (102), or with the second gear wheel (112) of the second axis (110) advantageously corresponds to the first axis (102).

7. Parasol according to claim 2 characterized in that it comprises in or on the base (32) of the support mast (30) a rotation mechanism (33) of the support mast (30) relative to said base (32), and in that it comprises on its support mast (30) or on its shuttle (70) a handle or a lever which is designed to act respectively on a rod or rack (605) housed along the support mast (30), so as to move it against the force of a return spring in order to unlock with its lower end (607) a locking lug (609) of the rotation mechanism (33).

8. Parasol according to claim 7 characterized in that said handle or said lever is arranged on the shuttle and is designed to act on a rack housed along the support mast (30) and further ensures the locking of the position of the shuttle (70) on the support mast (30).

9. Parasol according to claim 1 characterized in that said first mechanical group (100) is mounted on the support mast (30) in a fixed position, and in that the rotational movement of the winding spool (104) is designed for winding or unwinding a cable or the rotational movement of the drive pulley of one or more belts is designed for opening and closing the parasol and in that the means for driving the rotational movement is designed to rotate at least part of the articulated arm or main rib (50) on its longitudinal axis.

10. Parasol according to claim 1 or 9 characterized in that a mechanical group (100) is mounted on the support mast (30) in a fixed position, and in that the rotational movement of the winding reel (104) is designed for winding or unwinding a cable or the rotational movement of the drive pulley of one or more belts is designed for controlling the upward or downward movement of the shuttle (70) and in that the means for driving the rotational movement is designed to cause the rotation of the support mast (30) relative to its base (32).

11. Parasol according to claim 10 characterized in that said cable is connected to said winding reel (104) and to the shuttle (70) passing through a fixed point (52) of the support mast (30), located beyond the shuttle (70) or the belt(s) are driven by said drive pulley and returned by a pulley of the shuttle (70) passing through a fixed point (52) of the support mast (30), located beyond the shuttle (70).

12. Parasol according to claim 10 characterized in that the means for driving the rotational movement consists of a worm screw (114) which drives by means of a toothed wheel (i) a shaft possibly flexible connected to the base (32) or (ii) a stirrup controlling a rod or rack (605) housed along the support mast (30), so as to move it against the force of a return spring in order to unlock with its lower end (607) a locking lug (609) of a rotation mechanism (33) housed in the base (32).

13. Parasol according to claim 1 or 9 comprising a second mechanical group (1100) mounted on the support mast (30) in a fixed position, and in that the rotational movement of the winding spool (104) is designed for winding or unwinding a cable or the rotational movement of the drive pulley drives one or more belts used for the upward or downward movement of said shuttle (70) and in that the means for driving the rotational movement is designed to drive the rotation of the support mast (30) relative to its base (32), by means of a possibly flexible shaft connected to the base (32).

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