A dusting cleaner nozzle incorporating first and second suction heads

Abstract

A suction nozzle (1) of a vacuum cleaner, designed to be moved over a surface to be cleaned, comprises a first head (2) comprising a first suction conduit (6) pneumatically connected to a first suction opening provided on a lower surface of said first head (2). The suction nozzle (1) of the vacuum cleaner comprises a second head (3) extending forwardly of said first head (2) and comprising a second suction opening provided on a lower surface of said second head (3). The suction nozzle (1) of the vacuum cleaner comprises a second suction conduit (9) extending at least partially into said second head (3) and pneumatically connected to said second suction opening. The suction nozzle (1) of the vacuum cleaner comprises at least one distributor element allowing to vary the suction distribution between the first suction opening and the second suction opening, wherein the distributor element can be in at least a first distribution position in which it allows suction at least through the first suction opening and a second distribution position in which it allows suction at least through the second suction opening. The suction nozzle (1) of the vacuum cleaner further comprises a pneumatic actuator (21) allowing to move the distributor element between the first distribution position and the second distribution position.

Description

Technical Field

[0001] This invention relates to the field of vacuum cleaners, and more particularly to the design of vacuum cleaner nozzles, which are also called suction heads or suction heads, through which dust is sucked in.

[0002] The present invention aims to design a vacuum cleaner nozzle that ensures optimal suction power across the entire surface to be vacuumed, even in the presence of obstacles. Background Technology

[0003] Traditionally, canister vacuums or broom vacuums consist of nozzles made up of rectangular or triangular heads.

[0004] The latest design of the rectangular nozzle allows for effective dust removal on all types of surfaces, such as carpets, rugs, smooth floors, parquet floors, etc., with carpets being the most challenging to clean. In particular, the adoption of energy labels in the vacuum cleaner industry has led manufacturers to reduce the power of vacuum cleaner motors, thereby lowering the intake airflow rate, and resulting in the development of the rectangular nozzle, which maintains maximum suction performance at lower airflow rates.

[0005] However, this rectangular nozzle cannot adequately reach all types of surfaces to be vacuumed. For example, it cannot adequately reach hard-to-reach surfaces, such as those in room corners or along baseboards. When using specific nozzles (such as triangular nozzles), dust removal efficiency in room corners or along baseboards is much higher.

[0006] Ideally, each vacuum cleaner should be equipped with two nozzles: one with a rectangular head and the other with a different head better suited for hard-to-reach surfaces, so as to provide optimal performance in all situations (unobstructed surfaces or the presence of obstacles such as room corners, baseboards, or furniture).

[0007] Some rectangular nozzle designs attempt to overcome this drawback.

[0008] Patent US3936903 describes a rectangular head nozzle with adjustable airflow for vacuuming corners of a room.

[0009] Patent US7051401 describes a rectangular head nozzle that also includes a corner suction device located on the side of the rectangular head.

[0010] In patent GB2402329A, the nozzle consists of a suction head with two rectangular lateral elements that can be folded up for vacuuming in the corners of a room.

[0011] However, the aforementioned nozzles do not provide a solution that is both ergonomic and efficient enough to vacuum dust from room corners or along baseboards. Summary of the Invention

[0012] The present invention aims to design a vacuum cleaner nozzle that allows for overcoming the aforementioned drawbacks.

[0013] Therefore, the present invention relates to a vacuum cleaner nozzle designed to move on a surface to be vacuumed, the nozzle including a first head, the first head including a first suction conduit, the first suction conduit being pneumatically connected to a first suction port disposed on a lower surface of the first head.

[0014] The suction nozzle also includes:

[0015] - The second head extends the first head forward and includes a second suction port disposed on the lower surface of the second head.

[0016] - A second suction cannula, which extends at least partially into the second head and is pneumatically connected to the second suction port.

[0017] - At least one dispenser element for altering the suction distribution between a first suction port and a second suction port, wherein the dispenser element is capable of occupying at least a first distribution position and a second distribution position, in the first distribution position allowing suction at least through the first suction port, and in the second distribution position allowing suction at least through the second suction port.

[0018] - At least one pneumatic actuator for moving the dispenser element between a first dispensing position and a second dispensing position.

[0019] This invention allows for the provision of a suction nozzle whose suction configuration and suction performance can be altered by changing the suction distribution between the two heads. Therefore, it is possible to obtain a suction nozzle with suction performance approaching that of using the first head alone, using the second head alone, or using both heads in combination.

[0020] Therefore, the nozzle can combine the performance of the first head and the second head. The first head has been thoroughly studied and its suction performance has been optimized to pass various performance tests, while the second head allows for auxiliary functions, such as dust removal in hard-to-reach areas.

[0021] Specifically, the suction nozzle according to the invention has the following advantages: it is partially composed of a first head and a second head, the first head being standard and mass-producible, and unrelated to the second head, the second head being different from the first head, and more specifically, the second head allowing differentiation between the suction nozzle according to the invention and a suction nozzle composed solely of the first head. Therefore, by reusing the first head with its superior performance, the development and production costs of the suction nozzle according to the invention can be reduced.

[0022] Furthermore, by using a pneumatic actuator to move the dispenser element between the first and second positions, the user can change the position of the dispenser element with little or no operation. Using a pneumatic actuator is also a simple and reliable way to move the dispenser element between the first and second positions. Finally, a simple and robust structure of the vacuum cleaner nozzle according to the present invention can be obtained using a pneumatic actuator.

[0023] In addition, vacuum cleaner nozzles may have one or more of the following features, either individually or in combination.

[0024] The pneumatic actuator includes a pneumatic chamber and an actuating member that can move between a first actuating position and a second actuating position according to the air pressure in the pneumatic chamber.

[0025] Preferably, the first actuation position corresponds to the first allocation position, and the second actuation position corresponds to the second allocation position.

[0026] Advantageously, the actuating member is an elastically deformable diaphragm that can move between a first actuation position and a second actuation position according to the air pressure in the pneumatic chamber.

[0027] Using a pneumatic actuator with a deformable diaphragm in a vacuum cleaner nozzle allows for a nozzle height that is still limited, making it easier for the nozzle to pass under low furniture. In fact, pneumatic actuators using deformable diaphragms are relatively flat compared to piston-cylinder type pneumatic actuators.

[0028] Furthermore, using a deformable diaphragm as the actuation mechanism allows for a simple and reliable nozzle structure. In fact, using a deformable diaphragm instead of, for example, a piston rod as the actuating member avoids the need for components in a pneumatic actuator to slide relative to each other, and thus avoids the need to adjust the translational guidance of, for example, a piston sliding in a cylinder.

[0029] Advantageously, in the first actuated position, the elastically deformable diaphragm at least partially, preferably completely, closes the second suction conduit, while in the second actuated position, it opens the second suction conduit.

[0030] In one embodiment, the elastically deformable diaphragm also forms a dispenser element. In a first dispensing position, the elastically deformable diaphragm closes the second suction conduit and allows suction only through the first suction port; in a second dispensing position, the elastically deformable diaphragm opens the second suction conduit and allows suction through both the first and second suction ports.

[0031] In the above embodiment, the elastically deformable diaphragm forms a distributor element. Therefore, the structure of the sub-assembly formed by the pneumatic actuator and the distributor element is simplified, since, according to this embodiment, the pneumatic actuator also forms a distributor element.

[0032] In an advantageous embodiment of the invention described below, the distributor element is separate from the pneumatic actuator.

[0033] Advantageously, the dispenser element is a valve disc mounted on a pivot link. In the first dispenser position, the valve disc opens the first suction conduit, allowing suction through the first suction port. In the second dispenser position, the valve disc opens the second suction conduit, allowing suction through the second suction port.

[0034] Using a valve disc mounted on a pivot link is a reliable and simple way to distribute the suction flow between the first and second suction ports. In fact, a simple rotation of the valve disc about its pivot axis allows for a change in flow distribution.

[0035] Advantageously, the pivot axis of the valve extends transversely to the nozzle and is located in front of the valve, i.e., on one side of the nozzle tip. The pivot axis of the valve is preferably located at the intersection of the first and second suction conduits.

[0036] Advantageously, the valve disc seals the first or second conduit. A sealing device, such as a lip seal, can be installed around the valve disc.

[0037] Advantageously, in the first distribution position, the valve flap closes the second suction conduit to prevent suction from being performed through the second suction port.

[0038] The advantage of this design is that it allows for suction through only the first head, enabling suction performance similar to that of a nozzle typically consisting only of the first head.

[0039] Advantageously, in the second distribution position, the valve flap closes the first suction conduit, preventing suction through the first suction port. Advantageously, the valve flap also closes the upstream portion of the first suction conduit leading to the first suction port. This second distribution position allows the suction airflow to be concentrated at the location of the second suction port, enabling the second suction port to benefit from the maximum suction power of the device and thus improving suction efficiency in areas such as baseboards, wall corners, or room corners.

[0040] In an alternative embodiment, in the second dispensing position, the valve opens the first suction conduit and the second suction conduit to allow simultaneous suction through the first suction port and the second suction port.

[0041] Advantageously, when the elastically deformable diaphragm moves from the second actuated position to the first actuated position where it closes the second suction conduit, the suction negative pressure formed in the downstream portion of the first suction conduit drives the valve disc to pivot from the second distribution position to the first distribution position. The downstream portion is located downstream of the valve disc.

[0042] In other words, when the vacuum cleaner's suction unit is operating, or when the suction unit is activated while the diaphragm is already in the first actuated position, once the elastically deformable diaphragm moves from the second actuated position to the first actuated position, this positional change drives the valve disc to pivot from the second distribution position to the first distribution position. In effect, in the first actuated position, the elastically deformable diaphragm closes the second suction conduit, thus creating a suction negative pressure in the first suction conduit, rather than in the second, when the vacuum cleaner is activated. The second suction conduit is closed by the elastically deformable diaphragm in the first actuated position. The suction negative pressure generated in the first suction conduit, by pivoting the valve disc about its pivot axis, raises the valve disc from the second distribution position to the first distribution position.

[0043] In this preferred embodiment, the pneumatic actuator thus allows the valve disc to pivot from the second distribution position to the first distribution position without any mechanical connection between the diaphragm and the valve disc, because it is the suction negative pressure generated in the first suction conduit that moves the valve disc to the first distribution position. In other words, the change in the actuation position of the pneumatic actuator drives the change in the distribution position of the valve disc, while the elastically deformable diaphragm acts directly on the valve disc without a mechanical connection. This enables a simple, reliable, and compact design.

[0044] Advantageously, when the elastically deformable diaphragm moves from the first actuated position to the second actuated position where it opens the second suction conduit, the suction negative pressure generated in the downstream portion of the first suction conduit located downstream of the valve disc drives the valve disc to pivot from the first distribution position to the second distribution position.

[0045] The negative suction pressure generated in the first suction conduit causes the valve disc to pivot from the first distribution position to the second distribution position. However, this pivoting to the second distribution position is only possible when the diaphragm is in the second actuated position, in which the diaphragm retracts to open the second suction conduit. The pressure difference between the upstream and downstream of the valve disc initiates its pivoting towards the second distribution position. Therefore, the pivoting of the valve disc towards the second distribution position is also a result of the change in the actuation position of the pneumatic actuator, and the elastically deformable diaphragm does not act directly on the valve disc.

[0046] Advantageously, the mass of the valve disc and the position of its center of gravity are determined so that the valve disc is driven by gravity to the second distribution position of the valve disc.

[0047] Preferably, the first distribution position and the second distribution position are defined by a valve seat or valve support formed in the first suction conduit and the second suction conduit.

[0048] Advantageously, the valve disc is held in a first and / or second dispensing position by at least one magnet.

[0049] The valve disc can be stabilized in either the first or second dispensing position by using a magnet. Furthermore, the magnet or ferromagnetic component can be advantageously placed at the free end of the valve disc to increase its weight and shift its center of gravity towards the free end. This added mass facilitates the transition from the first to the second dispensing position. Preferably, the valve disc is made of plastic, except for the optional magnet or ferromagnetic element.

[0050] In an alternative, the actuating component of the pneumatic actuator is mechanically connected to the valve disc, and the movement of the actuating component causes the valve disc to move, for example, by pulling or pushing the valve disc.

[0051] According to the above alternatives and the first possibility, the actuating member is an elastically deformable diaphragm, which is mechanically connected to the valve disc, for example, by a cable or connecting rod, and the deformation of the elastically deformable diaphragm pulls or pushes the valve disc.

[0052] According to the above alternative and the second possibility, the actuating member can be a piston rod mechanically connected to a distributor device, which is implemented, for example, by a valve disc mounted on a pivot and rotatable about the pivot.

[0053] Advantageously, the vacuum cleaner nozzle includes a pneumatic distributor that can move between a first distribution position and a second distribution position. The pneumatic distributor is pneumatically connected to the pneumatic chamber of the pneumatic actuator through its outlet.

[0054] Advantageously, in the first distribution position, the pneumatic distributor connects the inlet of the pneumatic distributor, which is open to ambient pressure, to the pneumatic chamber to place the pneumatic chamber at ambient pressure, and wherein, in the second distribution position, the pneumatic distributor connects the downstream portion of the first suction conduit located downstream of the distributor device to the pneumatic chamber to generate a negative pressure in the pneumatic chamber when a suction negative pressure is generated in the downstream portion.

[0055] In other words, the pneumatic distributor allows the pneumatic chamber to be pressurized to ambient pressure in the first distribution position. When the pneumatic chamber is at ambient pressure, the diaphragm is in a rest position corresponding to the first actuation position, in which the diaphragm closes the second suction conduit.

[0056] In the second distribution position, the pneumatic distributor allows communication between the downstream portion of the first suction conduit, located downstream of the distributor device (e.g., valve disc), and the pneumatic chamber, so that a negative pressure is generated in the pneumatic chamber when a suction negative pressure is generated in the downstream portion. In this second distribution position, and when a suction negative pressure is generated in the downstream portion of the first suction conduit, the pneumatic chamber is under negative pressure relative to ambient pressure, which has the effect of causing the diaphragm to retract to open the second suction conduit.

[0057] As a result of this configuration and the connection choice at the pneumatic distributor, the pneumatic actuator is not supplied with any energy other than the energy generated by the vacuum cleaner for vacuuming the floor.

[0058] The position of the pneumatic distributor can be controlled in different ways.

[0059] According to the first option, the pneumatic distributor moves between a first distribution position and a second distribution position via an actuation button located on the nozzle. Advantageously, the actuation button can be manually activated by the user.

[0060] Alternatively, the pneumatic distributor moves between a first distribution position and a second distribution position via an electric controller or electric actuator mounted on the nozzle.

[0061] Advantageously, the suction nozzle according to the invention may include an obstacle detector. The electric controller or electric actuator is activated or deactivated based on changes in the state of the obstacle detector.

[0062] According to another option, the pneumatic distributor is operatively connected to at least one movable stop of the second head. The movable stop is movably mounted relative to the second head between a first stop position and a second stop position, in the first stop position extending at least partially relative to the second head, and in the second stop position retracting at least partially relative to the second head.

[0063] The movable stop is preferably located at the front of the second head.

[0064] When an obstacle is encountered, the movable stop moves from a first stop position to a second stop position. Advantageously, the movable stop is located on the second suction head to detect obstacles in front of or to the side of the suction nozzle.

[0065] Advantageously, a return spring is positioned between the second head and the movable stop to return the movable stop to the first stop position.

[0066] Advantageously, the pneumatic distributor is operatively connected to the at least one movable stop such that movement of the movable stop from a first stop position to a second stop position drives the pneumatic distributor to change position from a first distribution position to a second distribution position, and movement of the movable stop from a second stop position to a first stop position drives the pneumatic distributor to change position from a second distribution position to a first distribution position.

[0067] The functional connection between the movable stop and the pneumatic distributor enables the movable stop to control the pneumatic distributor between a first distribution position and a second distribution position. According to this embodiment, the pneumatic distributor is thus automatically controlled, and no additional energy is required beyond the energy needed to move the movable stop between the first and second stop positions. Therefore, the nozzle can automatically adjust its suction configuration based on the movable stop's detection of obstacles. For example, when the movable stop encounters an obstacle in front or to the side, such as a baseboard, the nozzle automatically adjusts by changing the position of the distributor element to suction through the second suction port of the second suction head, instead of only through the first suction port of the first suction head.

[0068] Advantageously, the pneumatic distributor includes a sliding valve slidable between a first distribution position and a second distribution position. One end of the sliding valve is in direct contact with the support surface of a movable stop. Movement of the movable stop from the first stop position to the second stop position drives movement of the sliding valve from the first distribution position to the second distribution position, and movement of the movable stop from the second stop position to the first stop position drives movement of the sliding valve from the second distribution position to the first distribution position. The support surface of the movable stop is, for example, the surface of the rear portion of the movable stop.

[0069] This embodiment allows for a simplified nozzle because the movement between the movable stop and the pneumatic distributor does not require any intermediate moving parts between them. This simplification also makes the operation of the dispensing system, which includes the dispenser assembly, pneumatic actuator, pneumatic distributor, and movable stop, more reliable. Without any intermediate moving parts between the movable stop and the distributor, the response time for moving the dispenser element between a first and second dispensing position based on whether the movable stop detects an obstacle is reduced. This embodiment allows for improved responsiveness of the dispensing system.

[0070] Advantageously, the movable stop is reset to the first stop position by an elastic reset device disposed between the movable stop and the second head. Advantageously, the elastic reset device is a spring.

[0071] Advantageously, the pneumatic distributor is of the monostable type and includes a reset device, such as a reset spring for resetting the sliding valve to the first distribution position.

[0072] Advantageously, the distribution system reaches a static state under the following conditions:

[0073] -When the movable stop is in the first stop position

[0074] - When the pneumatic distributor is placed in the first distribution position, the position of the pneumatic distributor depends on the position of the movable stop.

[0075] - When the pneumatic actuator is placed in the first actuated position, where the position of the pneumatic actuator depends on the position of the pneumatic distributor, and

[0076] - When the distributor device is placed in the first distribution position, the position of the distributor device depends on the position of the pneumatic actuator.

[0077] Advantageously, the second head differs from the first head. This difference is designed to better suit more specific and harder-to-access surfaces. This difference can be geometrical. For example, the second head could be generally triangular, while the first head is generally rectangular. This difference could also be due to variations in the ground clearance between the two heads. Furthermore, it could be due to differences in the shape of the suction port between the first and second heads.

[0078] Advantageously, the second head is triangular, and the movable stop is V-shaped. This V-shape extends on both sides of the second head, forming the tip of the triangular second head. This arrangement of movable stops extending on both sides of the triangular second head allows for the detection of obstructions in front of or to the side of the nozzle, such as baseboards, room corners, or furniture.

[0079] Advantageously, the first end has a rectangular shape. According to another design of the nozzle, the first end has a trapezoidal shape.

[0080] This characteristic allows the nozzle to have a first head with a conventional shape and construction, and its performance has been proven on other nozzles.

[0081] According to another design of the nozzle, the width of the second head is smaller than that of the first head.

[0082] This feature allows for the creation of a nozzle that has a first head that is wide enough to ensure vacuuming over a wide area, and a second head positioned in front of the first head that is narrower and makes it easier to vacuum in room corners or around bends.

[0083] According to the invention, the suction nozzle includes an end piece for connection to a rigid or flexible tube, the end piece being connected to the rear end of a first suction conduit.

[0084] According to the invention, the nozzle includes a hinge system disposed between a second head and a first head. The hinge system is configured to allow the lower surface of the first head to tilt relative to the surface to be vacuumed during the forward or reverse movement of the nozzle, while keeping the lower surface of the second head substantially fixed relative to the surface to be vacuumed and advantageously parallel to it. Therefore, the first head of the nozzle according to the invention can include all the advantageous functions of currently existing nozzles, particularly those with rectangular heads, such as the ability to allow for head angle calibration, for example, to scrape the surface while vacuuming.

[0085] According to an embodiment of the hinged system, the hinged system includes at least one link, with its two ends pivotally connected to a first head and a second head, respectively. Preferably, the hinged system includes two links.

[0086] According to a preferred design of the nozzle, at least a portion of the second suction tube is flexible, thereby allowing free movement between the first and second heads. This free movement allows the first head to work freely and correctly during vacuuming of unobstructed surfaces without interference from the second head.

[0087] According to the subject matter of the suction nozzle, the second head includes a larger ground clearance than the first head. This maintains full dust removal efficiency, especially when vacuuming carpet-type surfaces; the larger ground clearance of the second head, positioned in front of the first head, ensures that the lower surface of the second head does not contact the surface, particularly in the case of carpet, which has the effect of keeping dust on the surface during vacuuming by the first head.

[0088] The present invention also relates to a vacuum cleaner comprising a nozzle having one and / or another of the features described above. The vacuum cleaner is preferably a canister vacuum cleaner or a broom vacuum cleaner type well known to those skilled in the art. Attached Figure Description

[0089] The following description illustrates the features and advantages of the invention. This description is based on the accompanying drawings, in which:

[0090] Figure 1 A schematic diagram of a suction nozzle according to one embodiment is shown;

[0091] Figure 2 The first dispensing position of the dispenser element is shown in a side cross-sectional view. Figure 1 The mouthpiece;

[0092] Figure 3 The second dispensing position of the dispenser element is shown in a side cross-sectional view. Figure 1 The mouthpiece;

[0093] Figure 4 It is also located in the first distribution position of the distributor element. Figure 2 Pneumatic diagram of the suction nozzle.

[0094] Figure 5 It is also located in the second distribution position of the distributor element. Figure 3 Pneumatic diagram of the suction nozzle. Detailed Implementation

[0095] In the following description, the vacuum cleaner nozzle is referred to as the nozzle.

[0096] exist Figure 1 In this design, the nozzle 1 includes a first head 2, advantageously formed by a rectangular head, and a second head 3, advantageously formed by a triangular head. The second head 3 defines a pointed shape that includes a suction port 4, which may also be triangular in shape, allowing the nozzle 1 to more easily reach corners of the room or surfaces to be vacuumed along the baseboard. The suction port 4 leads to the lower surface 10 of the second head 3.

[0097] During surface vacuuming, the nozzle 1 is moved back and forth or in opposite directions. The nozzle moves forward when pushed and backward when pulled by a handle (not shown), for example, an integral part of a suction tube (not shown) attached to the nozzle 1. When the nozzle moves forward, one or more leading edges of the nozzle define the front portion of the nozzle. When the second head has a pointed shape, the pointed shape of the nozzle 1 also defines the front portion of the nozzle. In this invention, the second head 3 is positioned in front of the first head, thus extending the first head 2 forward.

[0098] like Figure 1 As shown, the first head 2 and the second head 3 are connected to each other by two connecting rods 119 and 120. The rear ends 119a and 120a of the connecting rods are pivotally connected relative to the body of the first head 2 along axis 117, and the front ends 119b and 120b of the connecting rods are pivotally connected relative to the body of the second head 3 along axis 121. During the forward and backward or opposite movement of the suction nozzle 1, the first head 2 can tilt or lift slightly; the connecting rods 119 and 120 ensure that the second head 3 moves flat relative to the first head 2. In other words, the second head 3 can move forward or backward relative to the first head 2 while keeping the lower surface 10 of the second head 3 parallel to the surface 5 to be vacuumed.

[0099] like Figures 1 to 3 As shown, the first head 2 includes a first suction conduit 6 and a first suction port 7 connected to an upstream portion 61 of the first suction conduit 6. The first suction port 7 has, for example, a rectangular shape with an opening on the lower surface 8 of the rectangular head.

[0100] In this specification, upstream and downstream are defined relative to the direction of airflow drawn in when the vacuum cleaner is working.

[0101] In addition, such as Figures 1 to 3 As shown, the nozzle 1 includes a second suction conduit 9 that extends between the suction port 4 at the second end and the first suction conduit 6. In other words, the second suction conduit 9 allows for pneumatic communication between the suction port 4 and the first suction conduit 6.

[0102] like Figures 2 to 5 As shown, the second suction catheter 9 opens at the middle portion 64 of the first suction catheter 6. The middle portion 64 extends between the first suction port 7 and the rear end 65 of the first suction catheter 6. More specifically, the middle portion 64 is located between the upstream portion 61 of the first suction catheter and the downstream portion 62 connected to the rear end 65. Figures 2 to 5 As shown, the middle portion 64 is advantageously bent at an angle of approximately 90 degrees (90°). The rear end 65 is intended to be connected, for example via an intermediate connecting end piece (not shown), directly or indirectly to a rigid suction tube (not shown), which itself is connected to the suction unit (not shown).

[0103] As described above, the second suction catheter 9 includes a middle portion 93, which is advantageously flexible to allow the second head 3 to move freely and planarly back and forth or in opposite directions relative to the first head 2, as described above.

[0104] In an alternative embodiment not shown, both the first and second suction conduits lead parallel to an air collector at the nozzle. This air collector may be located downstream of both the first and second suction conduits. The air collector may include a so-called air inlet orifice for each of the first and second suction conduits and a so-called air outlet orifice leading to a downstream conduit extending between the air collector and a rear end for direct or indirect connection to the rigid suction conduit.

[0105] like Figures 2 to 5 As shown, the nozzle 1 includes at least one dispenser element 20, which allows alteration of the suction distribution between the first suction port 7 and the second suction port 4. The dispenser element 20 may occupy a first dispensing position and at least one second dispensing position. In the first dispensing position, the dispenser element 20 allows suction at least through the first suction port 7, and in the second dispensing position, the dispenser element 20 allows suction at least through the second suction port 4.

[0106] The nozzle 1 shown also includes a pneumatic actuator 21 that allows the dispenser element 20 to move between a first dispensing position and a second dispensing position.

[0107] like Figures 2 to 4 As shown, the distributor element 20 advantageously includes a valve disc pivotally mounted about a pivot axis 201.

[0108] In the first distribution position, the valve opens the first suction conduit 6, allowing suction through the first suction port 7, and preferably, seals the second suction conduit 9 to prevent suction through the second suction port 4. In the second distribution position, the valve opens the second suction conduit 9, allowing suction through the second suction port 4.

[0109] In a preferred embodiment, such as Figure 3 As shown, in the second dispensing position, the valve opens the second suction conduit 9 and seals the first suction conduit 6, preventing suction through the first suction port 7. More precisely, the valve closes the upstream portion 61 of the first suction conduit 6, which opens at the first suction port 7. This embodiment allows suction to be directed into the second suction head. This second dispensing position is particularly advantageous when the nozzle encounters corners, furniture, or room edges, as it allows for increased suction efficiency from the second head, whose preferred triangular shape allows it to approach these areas as close as possible to areas that are difficult for conventional nozzles to access.

[0110] In an alternative embodiment not shown, in the second dispensing position, the valve opens the first suction conduit 6 and the second suction conduit 9, thereby allowing simultaneous suction through the first suction port 7 and the second suction port 4.

[0111] like Figures 2 to 5 As shown, a valve disc is disposed in the first suction conduit 6. Advantageously, the valve disc is disposed in the middle portion 64 of the first suction conduit 6. The downstream portion 62 of the first suction conduit 6 is located downstream of the valve disc.

[0112] The pivot axis 201 of the valve disc preferably extends in a direction transverse to the suction nozzle 1 and is located in front of the valve disc, i.e., at the front end of the suction nozzle 1. The pivot axis 201 of the valve disc is preferably located at the intersection between the first suction conduit 6 and the second suction conduit 9.

[0113] In an alternative embodiment, the valve disc can be located in the pump collector as described above.

[0114] The pneumatic actuator 21 includes a pneumatic chamber 22 and an actuating member 23, which is movable between a first actuating position and a second actuating position according to the pressure of the gas (advantageously air) in the pneumatic chamber 22. When the vacuum cleaner is in operation, the first actuating position corresponds to a first distribution position, and the second actuating position corresponds to a second distribution position.

[0115] exist Figures 2 to 5 In the embodiment shown, the actuating member 23 is an elastically deformable diaphragm that can move between a first actuating position and a second actuating position according to the air pressure in the pneumatic chamber 22.

[0116] In the first actuated position, the elastically deformable diaphragm closes the second suction conduit 9, and in the second actuated position, it opens the second suction conduit 9. More precisely, in the first actuated position, the elastically deformable diaphragm has a convex shape toward the outside of the pneumatic chamber 22 to close the second suction conduit 9, and in the second actuated position, the diaphragm has a retracted shape to open the second suction conduit 9.

[0117] When the second suction conduit 9 is just closed by the elastically deformable diaphragm, the diaphragm has already deformed to occupy the first actuation position, and the suction negative pressure generated in the first suction conduit 6 drives the valve disc to pivot from the second distribution position to the first distribution position.

[0118] In practice, when the elastically deformable diaphragm moves, for example, just from the second actuated position to the first actuated position, in the first actuated position, the diaphragm closes the second suction conduit 9. During operation, the vacuum cleaner generates a suction negative pressure in the first suction conduit 6, not in the second suction conduit 9, which is closed by the elastically deformable diaphragm. The suction negative pressure generated in the first suction conduit 6 raises the valve disc from the second distribution position to the first distribution position by rotating it about its pivot axis 201.

[0119] Conversely, when the elastically deformable diaphragm moves from the first actuation position to the second actuation position where it opens the second suction conduit 9, the suction negative pressure generated in the downstream portion 62 of the first suction conduit 6 causes the valve disc to pivot from the first distribution position to the second distribution position.

[0120] In practice, when the elastically deformable diaphragm is in the second actuated position, it retracts to open the second suction conduit 9. The suction low pressure generated in the first suction conduit 6 creates a pressure difference between the upstream and downstream of the valve disc, thereby initiating the valve disc to pivot toward the second distribution position.

[0121] Preferably, the mass of the valve disc and its center of gravity are determined such that the valve disc is also driven by its weight to the second distribution position of the valve disc.

[0122] Preferably, the first and second dispensing positions are defined by valve seats or valve supports formed in the first suction conduit 6 and / or the second suction conduit 9. Preferably, these are valve seats formed in the first suction conduit 6. When the valve is in the first or second dispensing position, each seat preferably makes sealing contact with the valve.

[0123] Advantageously, the valve disc is held in a first and / or second dispensing position by at least one magnet.

[0124] exist Figure 3In the illustrated embodiment, the magnet 31 is integrally connected to the bottom wall of the first suction conduit 6, and the ferromagnetic element 32 is disposed at the free end of the valve disc. The magnet 31 and the ferromagnetic element 32 are disposed relative to each other to apply a pulling force and hold the valve disc in its second dispensing position, such as... Figure 3 As shown, the valve disc closes the first suction port 7. The magnetic force generated by the magnet 31 on the ferromagnetic element 32 of the valve disc, as well as the mass of the ferromagnetic element 32, helps the valve disc reach its second position and ensures minimal pressure on its support at the second distribution position to prevent the valve disc from rising uncontrollably toward the intermediate position, where it will simultaneously open the first suction conduit 6 and the second suction conduit 9.

[0125] The mouthpiece also includes, for example Figures 1 to 5 The pneumatic distributor 40 is shown. The pneumatic distributor 40 is movable between a first distribution position and a second distribution position. The pneumatic distributor 40 is pneumatically connected to the pneumatic chamber 22 of the pneumatic actuator 21.

[0126] At the first distribution position, the pneumatic distributor 40 opens its first orifice 41 to ambient pressure (see...). Figure 4 The pneumatic distributor 40 is connected to the pneumatic chamber 22 to place the pneumatic chamber 22 at ambient pressure. In the second distribution position, the pneumatic distributor 40 connects the downstream portion 62 of the first suction conduit 6 to the pneumatic chamber 22 to generate a negative pressure within the pneumatic chamber 22 when a suction negative pressure is generated in the downstream portion 62 (see...). Figure 5 ).

[0127] To enable communication between the downstream portion 62 of the first suction conduit 6 and the pneumatic chamber 22, at least two pneumatic conduits are provided. The first pneumatic conduit 45 connects the downstream portion 62 of the first suction conduit 6 to the second orifice 46 of the pneumatic distributor 40 (see...). Figure 1 and Figure 5 The second pneumatic conduit 47 connects the third port 48 of the pneumatic distributor 40 to the pneumatic chamber 22 (see...). Figure 1 and Figure 5 ).

[0128] When the pneumatic chamber 22 is under ambient pressure, the elastically deformable diaphragm is in a stationary position, where it bulges to close the second suction conduit 9. Placing the pneumatic chamber 22 under ambient pressure thus corresponds to the first actuation position of the pneumatic actuator and the first distribution position of the valve disc.

[0129] When a negative pressure is applied to the pneumatic chamber 22, the elastically deformable diaphragm deforms to retract. In this position, the elastically deformable diaphragm opens the second suction conduit 9. Therefore, applying a negative pressure to the pneumatic chamber 22 corresponds to the second actuation position of the pneumatic actuator 21 and the second distribution position of the valve disc.

[0130] Therefore, the position of the pneumatic distributor 40 determines the actuation position of the pneumatic actuator 21.

[0131] The position of the pneumatic distributor 40 can be controlled in various ways.

[0132] According to one possibility (not shown), the pneumatic distributor 40 can be moved between a first distribution position and a second distribution position by a manual actuation button provided on the nozzle 1, and is connected to the pneumatic distributor 40 by a mechanical transmission device.

[0133] According to an alternative embodiment (not shown), the pneumatic distributor 40 is an electrically controlled distributor, or it can be moved between a first distribution position and a second distribution position by an electric actuator disposed on the nozzle 1. The electric controller or electric actuator is activated or deactivated, for example, based on a change in the state of an obstacle detector disposed on the nozzle or on a gripping member disposed on the suction duct connecting the nozzle to the vacuum cleaner, or a manual control button. When the obstacle detector is used to control the position change of the pneumatic distributor, the obstacle detector is preferably disposed on the second suction head, and preferably in front of the second suction head.

[0134] In a preferred embodiment, such as Figures 1 to 5 As shown, the pneumatic distributor 40 is operatively connected to at least one movable stop 50 of the second head 3. The movable stop 50 is movable relative to the second head 3 between a first stop position where the movable stop 50 is extended and a second stop position where the movable stop 50 is retracted. The first stop position corresponds to the stationary position of the movable stop 50 when it does not encounter an obstacle, and the second stop position corresponds to the active position of the movable stop 50 when it encounters an obstacle, in which case the movable stop 50 is pushed into the interior of the second suction head. The stop is preferably located on the second suction head to detect obstacles in front of or to the side of the suction nozzle 1.

[0135] The pneumatic distributor 40 is operatively connected to the movable stop 50 such that the movement of the movable stop 50 from a first stop position to a second stop position drives the pneumatic distributor 40 to change position from a first distribution position to a second distribution position, and the movement of the movable stop from a second stop position to a first stop position drives the pneumatic distributor 40 to change position from a second distribution position to a first distribution position.

[0136] Advantageously, an elastic reset device, such as a return spring (not shown), is disposed between the second head 3 and the movable stop 50 to reset the movable stop to the first stop position. The movable stop 50 can be pivotally mounted or translated along, for example, the longitudinal direction of the nozzle. The longitudinal direction of the nozzle corresponds to the direction in which the nozzle moves back and forth when the user pushes or pulls the nozzle to vacuum a surface.

[0137] The functional connection between the pneumatic distributor 40 and the movable stop 50 is preferably a mechanical connection formed by mechanical transmission or direct contact, as described below.

[0138] like Figures 1 to 5 As shown, the pneumatic distributor 40 advantageously includes a sliding valve 42 slidable between a first distribution position and a second distribution position. One end 43 of the sliding valve 42 preferably contacts a support surface 51 located at the rear of the movable stop 50. Movement of the movable stop 50 from the first stop position to the second stop position drives movement of the sliding valve 42 from the first distribution position to the second distribution position. Conversely, movement of the movable stop 50 from the second stop position to the first stop position drives movement of the sliding valve 42 from the second distribution position to the first distribution position.

[0139] The aforementioned pneumatic distributor 40 is advantageously monostable because a reset device, such as a return spring 70, resets the sliding valve 42 to the first distribution position (see...). Figure 4 and Figure 5 ).

[0140] The pneumatic distributor 40 is advantageously monostable, movable between two positions, and includes three orifices.

[0141] The allocation system will reach a static state under the following circumstances:

[0142] -When the movable stop 50 is in the first stop position

[0143] - When the pneumatic distributor 40 is placed in the first distribution position, the position of the pneumatic distributor depends on the position of the movable stop.

[0144] - When the pneumatic actuator 21 is placed in the first actuated position, wherein the position of the pneumatic actuator depends on the position of the pneumatic distributor 40, and

[0145] - When the distributor element 20 is placed in the first distribution position, the position of the distributor element depends on the position of the pneumatic actuator.

[0146] The distribution system includes a distributor element 20, a pneumatic actuator 21, a pneumatic distributor 40, and a movable stop 50.

[0147] The second head 3 is advantageously triangular. Based on this triangular shape of the second head 3, the movable stop 50 is V-shaped, having two branches extending from both sides of the second head 3. The movable stop 50 then forms the tip of the second head 3.

[0148] The operation of nozzle 1 is described below.

[0149] When the suction nozzle 1 is ready to operate, the movable stop 50 extends when it encounters no obstruction, and the pneumatic distributor 40 is in a first distribution position, which connects the first orifice 41 of the pneumatic distributor 40 (open to ambient pressure) to the pneumatic chamber 22, thereby placing the pneumatic chamber 22 at ambient pressure. The pneumatic actuator 21 and thus the elastically deformable diaphragm are in a first actuated position, in which the elastically deformable diaphragm closes the second suction conduit 9. Then, the valve is in a first dispensing position, in which it opens the first suction conduit 6, allowing suction through the first suction port 7, and closes the second suction conduit 9, preventing suction through the second suction port 4 of the second suction head. In other words, in normal operation where no obstruction contacts the movable stop 50, only the first suction port 7 of the first suction head vacuums the surface to be cleaned.

[0150] When the movable stop 50 encounters a frontal or lateral obstacle, it retracts under the pressure of the obstacle. The slide valve 42 of the pneumatic distributor 40 is then actuated by the movable stop 50, causing the position of the pneumatic distributor 40 to change from a first distribution position to a second distribution position. Upon reaching the second distribution position, the pneumatic distributor 40 connects the downstream portion 62 of the first suction conduit 6 to the pneumatic chamber 22, thereby generating a negative pressure inside the pneumatic chamber 22. The elastically deformable diaphragm retracts and opens the second suction conduit 9. The suction negative pressure generated in the downstream portion 62 of the first suction conduit 6 drives the valve disc to pivot from the first distribution position to the second distribution position. In the second distribution position, the valve disc opens the second suction conduit 9, allowing suction through the second suction port 4 of the second suction head, and closes the first suction conduit 6, preventing suction through the first suction port 7. In an alternative embodiment, the first suction conduit 6 remains open in the second distribution position.

[0151] The features of the two variations of the above-mentioned nozzle 1 are not limiting, as other variations are also possible.

[0152] Of course, the present invention is by no means limited to the embodiments described and illustrated above, which are merely given as examples. In particular, some modifications may be made in the configuration of various elements or by substitution with equivalent techniques, which do not depart from the protection scope of the present invention.

[0153] Therefore, in alternative embodiments of the invention not shown, the first head may include a shape different from that described in the above embodiments. For example, the first head may have a generally trapezoidal shape with its trailing edge slightly larger than its leading edge. The side edges of the first head may also be slightly curved. The first head may also have a rectangular shape. The second head may have a trailing edge with a width less than or equal to the width of the leading edge of the first head, and a shape that converges toward the narrower front end. Therefore, the second head may have, for example, a semi-circular arched leading edge. The second head may have a different ground clearance than the first head.

Claims

1. A suction cleaner nozzle (1) designed to be moved over a surface (5) to be cleaned, the nozzle comprising a first head (2) comprising a first suction conduit (6) pneumatically connected to a first suction opening (7) provided on a lower surface (8) of the first head (2), characterized in that, The suction nozzle (1) comprises: - a second head (3) extending forward of the first head (2) and comprising a second suction mouth (4) provided on a lower face (10) of the second head (3), - a second suction conduit (9) extending at least partially into the second head (3) and connected in an aerodynamic manner with the second suction mouth (4), - at least one distributor element (20) allowing a variation of suction distribution between the first suction mouth (7) and the second suction mouth (4), the distributor element (20) being able to be at least in a first distribution position in which it allows suction at least through the first suction mouth (7) and in a second distribution position in which it allows suction at least through the second suction mouth (4), - at least one pneumatic actuator (21) allowing the movement of the distributor element (20) between the first distribution position and the second distribution position, wherein the pneumatic actuator (21) comprises a pneumatic chamber (22) and an actuating member (23) movable between a first actuating position and a second actuating position as a function of the air pressure in the pneumatic chamber (22), the first actuating position corresponding to the first distribution position and the second actuating position corresponding to the second distribution position, the actuating member (23) being an elastically deformable diaphragm movable between the first actuating position and the second actuating position as a function of the air pressure in the pneumatic chamber (22).

2. The mouthpiece (1) according to claim 1, wherein In the first actuating position, the elastically deformable diaphragm at least partially closes the second suction conduit (9) and in the second actuating position, it opens the second suction conduit (9).

3. The mouthpiece (1) according to claim 2, wherein In the first actuating position, the elastically deformable diaphragm completely closes the second suction conduit (9).

4. The mouthpiece (1) according to claim 2 or 3, wherein The elastically deformable diaphragm forms the distributor element (20), in the first distribution position, the elastically deformable diaphragm closes the second suction conduit (9) and allows suction only through the first suction mouth (7), and in the second distribution position, the elastically deformable diaphragm opens the second suction conduit (9) and allows suction through the first suction mouth (7) and the second suction mouth (4).

5. The mouthpiece (1) according to any one of claims 1 to 3, wherein The distributor element (20) comprises a valve flap mounted on a pivot link, the valve flap opening the first suction conduit (6) in the first distribution position to allow suction through the first suction mouth (7) and opening the second suction conduit (9) in the second distribution position to allow suction through the second suction mouth (4).

6. The mouthpiece (1) according to claim 5, wherein In the first distribution position, the valve flap closes the second suction conduit (9) and prevents suction through the second suction mouth (4).

7. The mouthpiece (1) according to claim 5, wherein In the second distribution position, the valve flap closes the first suction conduit (6) and thus prevents suction through the first suction mouth (7).

8. The mouthpiece (1) according to claim 5, wherein In said second dispensing position, said valve flap opens said first suction conduit (6) and said second suction conduit (9), thus allowing suction through said first suction mouth (7) and said second suction mouth (4).

9. The mouthpiece (1) according to claim 5, wherein When said elastically deformable septum moves from said second actuation position to a first actuation position thereof in which it closes said second suction conduit (9), the suction underpressure generated in the downstream portion (62) of the first suction conduit (6) located downstream of said valve flap drives said valve flap to pivot from said second dispensing position to said first dispensing position.

10. The mouthpiece (1) according to claim 5, wherein When said elastically deformable septum moves from said first actuation position to a second actuation position thereof in which it opens said second suction conduit (9), the suction underpressure generated in the downstream portion (62) of the first suction conduit (6) located downstream of said valve flap drives said valve flap to pivot from said first dispensing position to said second dispensing position.

11. The mouthpiece (1) according to claim 5, wherein Said valve flap is held in said first dispensing position and / or second dispensing position by at least one magnet (31).

12. The mouthpiece (1) according to any one of claims 1 to 3, comprising a pneumatic distributor (40) movable between a first distribution position and a second distribution position, said pneumatic distributor (40) being pneumatically connected with a pneumatic chamber (22) of said pneumatic actuator (21).

13. The mouthpiece (1) according to claim 12, wherein In said first distribution position, said pneumatic distributor (40) communicates an inlet (41) of the pneumatic distributor (40) open to the ambient pressure with said pneumatic chamber (22) to place said pneumatic chamber (22) at ambient pressure, and wherein, in said second distribution position, said pneumatic distributor (40) communicates a downstream portion (62) of the first suction conduit (6) located downstream of said distributor element (20) with said pneumatic chamber (22) to generate a negative pressure in said pneumatic chamber (22) when a suction underpressure is generated in said downstream portion (62).

14. The mouthpiece (1) according to claim 12, wherein Said pneumatic distributor (40) is moved between said first distribution position and said second distribution position by means of an actuation button provided on said mouthpiece (1), which is manually actuatable by a user.

15. The mouthpiece (1) according to claim 12, wherein Said pneumatic distributor (40) is moved between said first distribution position and said second distribution position by means of an electrically controlled or electrically actuated actuator provided on said mouthpiece (1).

16. The mouthpiece (1) according to claim 15, comprising an obstacle detector, according to a variation in the state of which, said electrically controlled or electrically actuated actuator is activated or deactivated.

17. The mouthpiece (1) according to claim 12, wherein Said pneumatic distributor (40) is operatively connected to at least one movable stop (50) of said second head (3), said movable stop (50) being movably mounted with respect to said second head (3) between a first stop position, in which said movable stop (50) at least partially projects with respect to said second head (3), and a second stop position, in which said movable stop (50) at least partially retracts with respect to said second head (3).

18. The mouthpiece (1) according to claim 17, wherein The pneumatic distributor (40) is operatively connected to the at least one movable stop (50) so that the movement of the movable stop (50) from the first stop position to the second stop position drives a change of position of the pneumatic distributor (40) from the first distribution position to the second distribution position, and the movement of the movable stop (50) from the second stop position to the first stop position drives a change of position of the pneumatic distributor (40) from the second distribution position to the first distribution position.

19. The mouthpiece (1) according to claim 18, wherein The pneumatic distributor (40) comprises a sliding spool (42) slidable between the first distribution position and the second distribution position, one end (43) of the sliding spool (42) being in direct contact with a bearing surface (51) of the movable stop (50), the movement of the movable stop (50) from the first stop position to the second stop position driving a movement of the sliding spool (42) from the first distribution position to the second distribution position, and the movement of the movable stop (50) from the second stop position to the first stop position driving a movement of the sliding spool (42) from the second distribution position to the first distribution position.

20. The mouthpiece (1) according to claim 17, wherein The second head (3) is triangular and the movable stop (50) is V-shaped extending on both sides of the second head (3) and forming the tip of the second head (3) which is triangular.

21. The mouthpiece (1) according to claim 17, wherein The movable stop (50) is returned to the first stop position by a resilient return device provided between the movable stop (50) and the second head (3).

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