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EP-4452032-B1 - NOZZLE AND VACUUM CLEANER

EP4452032B1EP 4452032 B1EP4452032 B1EP 4452032B1EP-4452032-B1

Inventors

  • KARLSSON, ROGER

Dates

Publication Date
20260506
Application Date
20211220

Claims (7)

  1. A nozzle (6) for a vacuum cleaner comprising: - a forward brush roller (11), - a rear, roller (13), - a motor (12) driving the forward brush roller and the rear roller, wherein the rear roller is adapted to be driven via a first belt (16), characterized in that the first belt is toothed, wherein the first belt is toothed on both the inside and outside.
  2. The nozzle according to any one of claim 1, wherein the forward brush roller is adapted to be driven via a belt (14,16).
  3. The nozzle according to claim 2 wherein the belt driving the forward brush roller is a second belt (14) interconnecting the motor (12) and the forward brush roller (11).
  4. The nozzle according to any one of claims 1 - 3, wherein the first belt (16) is adapted to be driven by the rotation of the forward brush roller (11).
  5. The nozzle according to any one of claims 1 - 4, wherein a gear wheel (25) is provided to press the outside of the first belt (16) against the the rear roller (13) to drive the rear roller (13).
  6. The nozzle according to any one of claims 1 - 5, wherein the rear roller adapted to be driven in an opposite direction to the direction in which the forward brush roller is adapted to be driven.
  7. A vacuum cleaner (1) comprising the nozzle (6) according to any one of claims 1 - 6.

Description

Technical field The present invention relates to a vacuum cleaner comprising a nozzle and also to a nozzle for the vacuum cleaner. Background Vacuum cleaners, such as battery powered stick vacuum cleaners, can be provided with different types of nozzles, for example with a motor driven agitator of different types such as a brush. Other types of vacuum cleaners also include nozzles. For example, stick, canister and robotic vacuum cleaners also have different types of nozzles. The nozzles can be designed to optimize cleaning of different types of material and for different types of environments. The nozzle may have different size and different type of agitator depending on the specific cleaning situation, e.g., hard floor cleaning, carpet cleaning or furniture cleaning. One particular type of nozzle can be provided with multiple brushes. For example, a forward brush can be supplemented with a rear brush. Such a nozzle is known from WO2020147431. Document JP2017131540 A, discloses a nozzle and a suction unit for bedding, such as Futon. The suction unit for bedding includes: two revolution bodies having a revolution impact body and a revolution cleaning body that are rotatably aligned in parallel. A motor rotationally drives the rotary impact body and the rotary cleaning body to rotate in the same direction via a mechanism having a gear and a rotating belt. There is a constant desire to improve vacuum cleaners to make them more efficient. Summary One object of the present invention is therefore to provide an improved vacuum cleaner with a nozzle and an improved nozzle for a vacuum cleaner. This object is achieved by a nozzle and a vacuum cleaner as set out in the appended claims. In accordance with the invention a nozzle for a vacuum cleaner is provided. The nozzle comprises a forward brush roller, and a rear roller. The nozzle further comprises a motor driving the forward brush roller and the rear roller where the rear roller is driven via a first belt. Hereby a belt drive of the rear roller is provided such that noise is reduced and the complexity of a motor drive of the rear roller can be reduced. The drive of the rear roller can advantageously be in the opposite direction to the drive of the forward brush roller to improve pick up of particles. In accordance with one embodiment the first belt is toothed. Hereby a secure drive can be achieved. In accordance with one embodiment the first belt is toothed on both the inside and outside. Hereby a secure drive that enables easy shift of direction drive for the rear roller in relation to the forward roller can be achieved. In accordance with one embodiment the forward brush roller is driven via a belt. In accordance with one embodiment, the belt driving the forward brush roller is a second belt interconnecting the motor and the forward brush roller. In accordance with one embodiment the first belt is driven by the rotation of the forward brush roller. In accordance with one embodiment, a gear wheel is provided to press the outside of the first belt against the drive of the rear roller. The invention also extends to a vacuum cleaner comprising a nozzle as set out above. Brief description of the drawings The invention will now be described in more detail by means of examples and with reference to the accompanying drawings, in which: Fig. 1 is a general view in perspective of a vacuum cleaner,Fig. 2 is a cross sectional side view of a vacuum cleaner nozzle, andFig. 3 is a view of a toothed belt for driving a roller of a vacuum cleaner nozzle. Detailed description Aspects of the present invention will now be described more fully. Like numbers refer to like elements throughout. Well-known functions or constructions will not necessarily be described in detail for ease of understanding and/or clarity. It is further to be understood that the features described can be combined in any suitable manner to meet different implementational needs. The present invention relates to a vacuum cleaner. In Fig. 1, a vacuum cleaner 1 is placed in a stand 2. The vacuum cleaner 1 is of a type where a part of the vacuum cleaner can be separated from the rest of the vacuum cleaner to form a hand-held unit. In Fig. 1. The vacuum cleaner 1 is a of a stick type and the top part of the vacuum cleaner 1 can be separated to form a hand-held unit (main unit) 3. However, the vacuum cleaner could be of any type. For example, the vacuum cleaner can be a stick, canister or robotic vacuum cleaner. Further, the hand-held unit or main unit 3 comprises a dust separation arrangement, an air inlet, an air out, a motor-fan unit creating an airflow from the air inlet through the dust separation arrangement to the air outlet, and a battery powering the motor fan unit as is known in the art. The main unit 3 can also comprise a controller configured to control different operational parameters of the vacuum cleaner 1. The vacuum cleaner 1 comprises a stick/tube 5 and a nozzle 6. The dust sucked by the vacuum clea