Brush with an extendable device element

Abstract

The invention relates to a brush (10) with a brush head (12), a drive unit (16) and a switching element (14). It is proposed that an extendable device element (18) be arranged between the brush head (12) and the switching element (14).

Description

[0001] The invention relates to a brush with an extendable device element. State of the art

[0002] The EP 4 101 361 A2 shows a cleaning device in the form of an electric brush. Disclosure of the invention

[0003] The invention relates to a brush comprising a brush head, a drive unit, a switching element, and an extendable device element arranged between the cutting head and the switching element. This ensures good accessibility to deep areas and back-friendly operation for the user of the brush.

[0004] The brush according to the invention, with the features of the independent claims, has the advantage of being particularly compact, powerful, and at the same time ergonomically easy to handle. A first housing of the hand-held power tool advantageously comprises a first housing part and a second housing part.

[0005] The terms "first housing part" and "second housing part" are used here to refer specifically to theoretical constructions that do not exist in practice. This means that the first housing part and the second housing part are not component units that can be assembled and / or disassembled. However, it is also conceivable that the first housing part and the second housing part are designed as separate component units.

[0006] If the drive is implemented by an electric drive, the manual effort required by the operator when working with the brush can be avoided in a particularly advantageous way.

[0007] Advantageously, electric drive concepts are implemented using an electric motor and a rechargeable battery. This makes the brushes easy to handle and allows for mobile use.

[0008] If the rechargeable battery is held by a handle element, a safe and convenient battery change is possible.

[0009] To make the device length variable, the length of the extendable device element is advantageously adjustable in increments. This allows the brush to be used at different distances. Drawings

[0010] The drawings show exemplary embodiments of a brush according to the invention.

[0011] They show: Fig. 1 a brush according to the invention with extendable device element in the basic state in schematic representation, Fig. 2 The brush according to the invention with extendable device element in the extended state in schematic representation. Description

[0012] The same reference numbers are used for the identical components that appear in the different embodiments.

[0013] Fig. Figure 1 shows a battery-powered electric tool designed as a brush 10, comprising a brush head 12, a switching element 14, a drive unit 16, an electronic unit 18, and an extendable device element 20. The brush has a first housing part 22 and a second housing part 24. Here, the terms "first housing part 22" and "second housing part 24" refer specifically to theoretical constructions that do not exist in practice. This means that the first housing part 22 and the second housing part 24 are not component units that can be assembled and / or disassembled. However, it is also conceivable that the first housing part 22 and the second housing part 24 are designed as separate component units. The housing parts 22 and 24 can be integrally connected. The drive unit 16 is located in the first housing part 22. The extendable device element 20 is located in the second housing part 24.

[0014] The drive unit 16 is designed as an electric drive unit or electric motor. The energy supply for the electric motor 16, which is located in the first housing part 22 on a side facing the brush head 12, is provided by a rechargeable battery 26. The rechargeable battery 26 is arranged at a rear end of the brush 10 on the second housing part 24.

[0015] The second housing part 24 is designed as a handle element 28. The term "handle element" refers to a component around which at least one hand of an operator can be placed. The switching element 14 is located on the handle element 28; when activated, the electric motor 16 is switched on.

[0016] Fig.Figure 2 shows the brush 10 with extendable device element 20 in its extended position. The extendable device element 20, which in this embodiment is designed as a rod, is located between the switching element 14 and the brush head 12. The rod 20 is extendable. Thus, the second housing part 24 has two grip positions. By extending the rod 20, the length of the brush 10, and therefore the reach of the work surface to be cleaned, can be increased by 20 to 40 cm.

[0017] However, it is also conceivable that the extendable device element 20 is realized either by a telescopic tube or an insertable intermediate part.

[0018] In both cases, the length can be designed variably.

[0019] A telescopic tube consists of one or more parallel cylinders guided within themselves, which, relative to the longitudinal center axis of the brush 10, can be extended linearly to a maximum extension length up to a stop and then retracted again. The operator releases a locking mechanism in which the telescopic arm is located using an actuating element. This allows the parallel cylinders to be extended to the desired length, but only until the stop is reached. By implementing the locking mechanism with suitable detents in the extendable device element between the start and end positions of the telescopic tube, the reach of the telescopic tube can be adjusted incrementally.

[0020] If the extendable device element 20 is implemented using an insertable intermediate part, it requires an interface at which the brush 10 is separated into two parts and the insertable intermediate part can be inserted. For extending or inserting the extendable device element 18, the interface can, for example, be located between the switching element 14 and the drive unit 16.

[0021] To install the insertable intermediate part, it is necessary to be able to disassemble brush 10 into two parts. Brush 10 can be separated into these two parts at the interface so that the insertable intermediate part can be inserted or removed. A tube with a shaft mounted inside it can serve as the insertable intermediate part.

[0022] Another relevant aspect is the center of gravity of the brush 10. The center of gravity should be located close to the handle element 28 to improve grip and control of the brush 10 while still allowing for flexible movement. A center of gravity close to the handle element 28 is achieved with an interface near the brush head 12. Thus, when the extendable device element 20 is extended, only the brush head 12 moves away from the area of ​​the handle element 28. Components such as the electric motor 16 remain close to the area where the handle element 28 is located.

[0023] Instead of an insertable intermediate part, it is also conceivable to use an attachable accessory part (not shown in detail). The attachable accessory part is fixed or lockably attached to the brush 10. It thus acts as an extension of the human arm. To enable operation of the brush 10, the attachable accessory part has a switch, the actuation of which is transmitted to the switching element 14 of the brush 10. This can be done mechanically via a lever or hydraulically or electrically. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 4 101 361 A2

[0002]

Claims

[1] Brush (10) with a brush head (12), a drive unit (16) and a switching element (14), characterized by , that an extendable device element (20) is arranged between the brush head (12) and the switching element (14). [2] Brush (10) according to claim 1, characterized by , that the drive unit (16) is realized by an electric drive. [3] Brush (10) according to one of claims 1 or 2, characterized by , that the brush has a rechargeable battery (26) and a handle element (28), wherein the rechargeable battery (26) is accommodated by the handle element (28). [4] Brush (10) according to any one of the preceding claims, characterized by , that the extendable device element (20) is a rod (54). [5] Brush (10) according to any one of the preceding claims, characterized by , that the extendable device element (20) is a telescopic arm. [6] Brush (10) according to any one of the preceding claims, characterized by, that the extendable device element (20) is an insertable intermediate part (54). [7] Brush (10) according to any one of the preceding claims, characterized by , that the length of the extendable device element (20) is adjustable in steps from compact to long.

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