Vacuum cleaner ventilation grille, vacuum cleaner and method for manufacturing a vacuum cleaner ventilation grille

Abstract

The invention relates to a vacuum cleaner ventilation grille, comprising - an injection-molded part (1) with a plurality of grid-shaped grid holes (11), and - a perforated foil (2) with a plurality of foil holes (21), wherein the perforated foil (2) is attached to the injection molded part (1) such that the grid holes (11) and the foil holes (12) are offset from each other and / or the foil holes (21) are at least one dimension smaller than the grid holes (11). Furthermore, the invention relates to a vacuum cleaner having such a vacuum cleaner ventilation grille, and to a corresponding method for manufacturing the vacuum cleaner ventilation grille.

Description

[0001] The invention relates to a vacuum cleaner ventilation grille, a vacuum cleaner, and a method for manufacturing a vacuum cleaner ventilation grille. The vacuum cleaner ventilation grille is advantageously designed with a delicate profile to allow the exhaust air from the vacuum cleaner flowing through it to escape efficiently. It is also advantageously designed to direct the exhaust air out at a specific angle. Due to its size, undercuts and contours that effectively direct the airflow are not readily achievable in a vacuum cleaner ventilation grille manufactured as an injection-molded part. However, injection-molded parts are inexpensive and quick to produce.

[0002] The invention thus addresses the problem of providing a vacuum cleaner ventilation grille, a vacuum cleaner, and a method for manufacturing the vacuum cleaner ventilation grille, all of which are cost-effective and quick to implement. During operation, exhaust air should flow out of the vacuum cleaner ventilation grille in an advantageous manner.

[0003] According to the invention, this problem is solved by a vacuum cleaner ventilation grille with the features of claim 1, a vacuum cleaner with the features of claim 7, and a method for manufacturing a vacuum cleaner ventilation grille with the features of claim 8. Advantageous embodiments and further developments of the invention are described in the following dependent claims.

[0004] The advantages achievable with the invention include, besides a smaller footprint for the vacuum cleaner ventilation grille, more effective airflow redirection through the grille, relatively low manufacturing costs, and satisfactory economic efficiency. Both the injection-molded part and the perforated film can be produced quickly and cost-effectively.

[0005] The invention is based on the fundamental idea of ​​producing an injection-molded part in an injection mold with a contour without undercuts, which causes only a relatively small deflection when the exhaust air is blown through the contour. This deflection is increased by attaching the perforated film to the injection-molded part. The perforated film is attached to the injection-molded part, with the film holes being smaller, in particular narrower, and / or slightly offset when in contact with the mesh compared to the mesh holes. This creates a separation edge at the upper edge of the overlapping holes, where the oncoming exhaust air becomes turbulent. A channel is formed by the hole contours and the turbulent areas, through which the exhaust air flows in the direction of the deflection. Such a contour cannot be produced in an injection mold. Using the solution according to the invention, the airflow can be deflected by contours that contain undercuts.This makes the airflow deflection significantly more effective in a small installation space. The function of the deflection of the vacuum cleaner's ventilation grille is to expel the vacuum cleaner's exhaust air without disturbing or blowing on the user, and without stirring up or blowing away dust from the floor.

[0006] The invention relates to a vacuum cleaner ventilation grille, comprising - an injection-molded part with a multitude of grid-like arranged grid holes, and - a perforated film with a multitude of film holes, wherein the perforated film is attached to the injection-molded part, such that the grid holes and the film holes are offset from each other and / or the film holes are smaller than the grid holes in at least one dimension.

[0007] The deflection is very effective because the foil holes are smaller and / or offset further downwards relative to the grille holes. Preferably, the foil holes are offset downwards relative to the grille holes. Position and direction specifications refer to the vacuum cleaner's standard operating position, in which the vacuum cleaner ventilation grille is or will be inserted.

[0008] In a preferred embodiment, the injection-molded part has an inner surface intended for placement inside a vacuum cleaner and an outer surface that forms at least part of the outer surface of the vacuum cleaner. The perforated film is preferably attached to the inner surface of the injection-molded part. This protects the perforated film from external influences during operation of the vacuum cleaner.

[0009] In a preferred embodiment, the inner surface is concave, and the perforated film is inserted into this concave surface. Preferably, the perforated film is attached to the injection-molded part by means of snap-in elements and / or adhesives. This ensures the coordinated functionality of both components.

[0010] Preferably, both the injection-molded part and the perforated film are made of plastic. This makes both components cost-effective. The injection-molded part is preferably made of polypropylene. Polypropylene is relatively lightweight, durable, and heat-resistant. The perforated film is preferably made of acrylonitrile butadiene styrene (ABS) or polycarbonate. ABS is relatively hard, strong, and heat-resistant. Polycarbonate is relatively lightweight, heat-resistant, and strong. Preferably, the perforated film is transparent. This makes it inconspicuous when viewed from the outside of the injection-molded part.

[0011] In a preferred embodiment, the multitude of grid-like arranged holes have a predetermined shape. The predetermined shape is preferably configured such that four grid holes form a cloverleaf structure. Therefore, the injection-molded part is preferably covered with a grid of cloverleaf patterns, each featuring four grid holes forming a cloverleaf structure. The number of grid holes and the number of film holes can be the same or different. Preferably, the number of grid holes can be greater than the number of film holes, thereby further increasing the flexibility of the injection-molded part.

[0012] Preferably, the injection-molded part is free of undercuts. This makes it easy to manufacture.

[0013] The invention further relates to a vacuum cleaner which has a vacuum cleaner ventilation grille according to one or more of the embodiments described above.

[0014] Preferably, the vacuum cleaner ventilation grille is arranged on one side of the vacuum cleaner. Preferably, the vacuum cleaner has several, e.g., two, ventilation grilles arranged on the left and right sides of the vacuum cleaner, relative to a typical operating position of the vacuum cleaner.

[0015] The vacuum cleaner's ventilation grille is integrated into the vacuum cleaner in such a way that its inner surface is located inside the vacuum cleaner, while its outer surface forms part of the vacuum cleaner's exterior. The vacuum cleaner's housing is designed to accommodate the ventilation grille.

[0016] Furthermore, the invention relates to a method for manufacturing a vacuum cleaner ventilation grille, comprising the following steps - Injection molding of a molded part with a large number of grid-like arranged grid holes, - Forming holes in a film to produce a perforated film with a large number of film holes, - Attaching the perforated film to the injection-molded part so that the grid holes and the film holes are offset from each other and / or the film holes are at least one dimension smaller than the grid holes.

[0017] In a preferred embodiment, holes are formed in a film by punching or laser cutting. This makes the step simple, fast, and cost-effective. For example, the film is unrolled from a roll and then perforated.

[0018] Preferably, the perforated film is attached to the injection-molded part using snap-in elements and / or adhesives. This ensures a durable and relatively slip-resistant bond between the injection-molded part and the perforated film.

[0019] An embodiment of the invention is shown schematically in the drawings and is described in more detail below. It is shown schematically and not to scale. Fig. 1. A perspective view of an injection-molded part; Fig. 2 a perspective view of a perforated foil; Fig. 3 a step of a method according to the invention; Fig. 4 a detailed view of the in Fig. 3 steps shown; Fig. 5 a perspective view of a vacuum cleaner ventilation grille according to the invention; Fig. 6 another perspective view of the in Fig. 5 vacuum cleaner ventilation grilles shown; Fig. 7 a partial cross-sectional view of the in Fig. 5 vacuum cleaner ventilation grilles shown; Fig. 8 another partial cross-sectional view of the in Fig. 5 vacuum cleaner ventilation grilles shown; and Fig. 9 a perspective view of a vacuum cleaner according to the invention.

[0020] Fig. Figure 1 shows a perspective view of an injection-molded part. The injection-molded part 1 has an outer surface (not shown) which is intended to serve as at least part of an outer surface in a vacuum cleaner, and an inner surface 12 which is intended to be arranged inside the vacuum cleaner. Fig. Figure 1 shows a view of the inner surface 12. The injection-molded part 1 has a plurality of grid-like lattice-shaped holes 11 arranged in a cloverleaf pattern, with four lattice-shaped holes 11 forming each cloverleaf structure. Furthermore, the injection-molded part 1 has locking elements 14 that project from the inner surface 12.

[0021] Fig. Figure 2 shows a perspective view of a perforated foil. The perforated foil 2 has a large number of foil holes 21. Furthermore, the perforated foil 2 has additional residual elements 22 in the form of openings, which are designed with the in Fig. The locking elements shown in 1 are used to create a fastening.

[0022] Fig. Figure 3 shows a step of a method according to the invention. An injection-molded part 1, which corresponds to the one described in Fig. 1 corresponds to the injection-molded part shown, and a perforated film 2, which corresponds to the one in Fig. The perforated foil shown in Figure 2 is provided. The perforated foil 2 is attached to the inside 12 of the injection-molded part 1 by placing it in the direction of the arrows, so that the grid holes 11 and the foil holes 12 are offset from each other and / or the foil holes 12 are at least one dimension smaller than the grid holes 11. The fastening is achieved by means of the snap-fit ​​elements 14 and further snap-fit ​​elements 22, and possibly by adhesive bonding.

[0023] Fig. 4 shows a detailed view of the in Fig. Step 3 shown. The injection-molded part 1 has a plurality of grid holes 11, four of which are shown. Four perforated films 21 are arranged offset from the grid holes 11, as indicated by arrows.

[0024] Fig. Figure 5 shows a perspective view of a vacuum cleaner ventilation grille according to the invention. The vacuum cleaner ventilation grille has the [feature / component] shown in Fig. 1 shown injection molded part 1 and the one in Fig. The perforated foil shown in Figure 2 is not visible because it is transparent and attached to an inner side (not shown) of the injection-molded part 1. Fig. Figure 5 shows a view of the outside 13 of the injection molded part 1.

[0025] Fig. Figure 6 shows another perspective view of the in Fig. 5 vacuum cleaner ventilation grilles shown. In Fig. Figure 5 shows a view of the perforated foil 2, which is attached to the inside 12 of the injection-molded part 1 by means of its snap-in elements 14. The snap-in elements 14 extend through the further snap-in elements 22 and are designed to project beyond them.

[0026] Fig. Figure 7 shows a partial cross-sectional view of the in Fig. Figure 5 shows a vacuum cleaner ventilation grille. The perforated film 2 has the film holes 21, one of which is shown, and the injection-molded part 1 has the grille holes 1, one of which is shown. The perforated film is attached to the inside 12 of the injection-molded part 1, so that the grille holes 11 and the film holes 12 are offset from each other. The film holes 21 are offset downwards relative to the grille holes 11. In addition, the film holes 21 are smaller than the grille holes 11 in at least one dimension.

[0027] Fig. Figure 8 shows another partial cross-sectional view of the in Fig. 5 vacuum cleaner ventilation grilles shown. The in Fig. The view shown in 7 corresponds to the one in Fig. The diagram shows the same view, with the difference that the exhaust air flowing through the vacuum cleaner ventilation grille is indicated by arrows. Because the foil holes 21 are narrower than the grille holes 11 and slightly offset when in contact with the surface, a separation edge (not shown) forms at one upper edge of the overlapping holes 11, 21, where the incoming exhaust air becomes turbulent. A channel is formed by the hole contours and the turbulent areas, through which the exhaust air flows in the direction of the deflection.

[0028] Fig. Figure 9 shows a perspective view of a vacuum cleaner according to the invention. The vacuum cleaner features the [missing information]. Fig. Four vacuum cleaner ventilation grilles are shown, such that they and their outer surface 13 are integrated into a vacuum cleaner housing 3. One such vacuum cleaner ventilation grille is arranged on the left and right sides of the vacuum cleaner. Reference symbol list 1 injection-molded part 11 grid holes 12 Inside 13 Outside 14 locking element 2 Perforated foil 21 foil holes 22 further locking element 3 vacuum cleaner housings

Claims

[1] Vacuum cleaner ventilation grille, comprising - an injection-molded part (1) with a plurality of grid-shaped holes (11), and - a perforated film (2) with a plurality of film holes (21), wherein the perforated film (2) is fastened to the injection-molded part (1) such that the grid holes (11) and the film holes (12) are offset from one another and / or the film holes (21) are smaller in at least one dimension than the grid holes (11). [2] Vacuum cleaner ventilation grille according to claim 1, characterized by that the injection-molded part (1) has an inner side (12) which is provided for arrangement in the interior of a vacuum cleaner, and an outer side (13) which is provided as at least part of an outer side in the vacuum cleaner, wherein the perforated film (2) is fastened to the inner side (12) of the injection-molded part (1). [3] Vacuum cleaner ventilation grille according to claim 1 or 2, characterized bythat the inner side (12) is concave and the perforated film (2) is inserted into the concave inner side (12) and fastened by means of locking elements (14) and / or adhesive. [4] Vacuum cleaner ventilation grille according to one of the preceding claims, characterized by that the injection-molded part (1) and the perforated film (2) are each made of plastic, wherein the injection-molded part is preferably made of polypropylene and / or the perforated film (2) is preferably made of acrylic butadiene styrene or polycarbonate. [5] Vacuum cleaner ventilation grille according to one of the preceding claims, characterized by that four grid holes (11) of the plurality of grid-shaped arranged grid holes (11) form a cloverleaf structure. [6] Vacuum cleaner ventilation grille according to one of the preceding claims, characterized by that the injection-molded part (1) is free of undercuts. [7] Vacuum cleaner comprising a vacuum cleaner ventilation grille according to one of the preceding claims. [8] Method for producing a vacuum cleaner ventilation grille, comprising the following steps - injection molding of an injection molded part (1) with a plurality of grid-shaped holes (11), - forming holes in a film to produce a perforated film (2) with a plurality of film holes (21), - Fastening the perforated film (2) to the injection-molded part (1) such that the grid holes (11) and the film holes (12) are offset from one another and / or the film holes (12) are smaller in at least one dimension than the grid holes (11). [9] Method according to claim 8, characterized by that the formation of holes in a film is carried out by punching or lasering the film. [10] Method according to claim 8 or 9, characterized bythat the perforated film (2) is fastened to an inner side (12) of the injection-molded part (1) by means of locking elements (14) and / or adhesive, wherein the inner side (12) is intended for arrangement in the interior of a vacuum cleaner.

Images