FR2876569A1 - VACUUM POWER INDICATOR FOR VACUUM CLEANER - Google Patents

Abstract

The invention relates to a visual indicator for the suction power of a vacuum cleaner, said visual indicator being carried by a control body (5) which enables the rate of a suction air leak to be regulated, and is contained in a housing (4) positioned on the grip of the vacuum cleaner. The inventive visual indicator is characterised by the fact that it consists of a photoconductive plastic element (11) embodied in such a way as to send the light back towards the upper face thereof, in privileged positions; by the fact that the plastic element (11) faces a window (12) in the upper part of the housing (4); and by the fact that it moves in relation to the window (12) when a sliding shutter (8) controlling the rate of the suction air leak is actuated by the control body (5), in such a way as to indicate the suction level by the visible part of the plastic element (11).

Description

VACUUM POWER INDICATOR FOR VACUUM CLEANER

  The invention relates to a visual indicator of the suction power of a vacuum cleaner by means of a light conductor.

  Most vacuums available on the market nowadays have means of regulating the suction power by means of adjustable openings. These openings are usually positioned at the top of the suction tube or on the butt of the vacuum cleaner to be easily operated by the users.

  It is indeed useful in many situations to use the vacuum cleaner with reduced suction power, in particular for cleaning light objects that may be entrained in the apparatus, curtains, fabrics and other flexible elements. can block the duct and block the cleaning activity.

  The reduction of the suction power is obtained in different ways, for example with a variable power motor, but also most often, and sometimes even complementary to the variable power motor, by means of openings positioned on the circuit. suction air. These openings make it possible to drop the suction pressure at the end of the line, at the level of the brush or at the level of a nozzle.

  Conventionally these manually operable openings are closed by sliding doors that have no indication of the suction power level which is a disadvantage for users.

  Conscious of this problem various manufacturers have positioned airflow indicators on the body of the vacuum cleaner in the form of display devices. Some of these indicators include LEDs and electronic circuits for the processing and transmission of information to the display.

  For the displays, it has sometimes been used devices for guiding the light, for example in the form of optical fibers or optical reflection means, these displays comprising a light-emitting diode-type light source for the indication of the power of the light. suction.

  These vacuum suction power indicators comprising electronic circuits and diodes have the double disadvantage of being expensive and relatively fragile, especially when users often handle the vacuums vigorously and the apparatus receives many shocks. , which may break the electrical connections.

  The invention therefore aims to solve these major difficulties by providing a very simple suction power indicator, having no diode (s) or electronic elements, or even a source of energy to operate, so very inexpensive to manufacture and use and highly reliable.

  Another object of the invention is to provide a device for modifying the suction power by an air leak which is silent.

  According to the invention, the visual indicator of the suction power of a vacuum cleaner is carried by a control member, which control member for adjusting the suction air leakage rate is contained in a positioned housing on the butt of the vacuum cleaner. Said visual indicator being characterized in that it consists of a light-conducting plastic element shaped to return the light towards its upper face, in privileged positions, in that the plastic element is facing a window arranged in the upper part of the housing, in that it is in relative movement with respect to the window when a sliding shutter, controlling the flow of the suction air leak, is actuated by the control, so as to indicate the level of suction by the visible part of the plastic element.

  The advantages of the light conductor suction power indicator are multiple, the most important being the extreme simplicity of the device and the very low cost of manufacture. The aesthetics of the element and its robustness are also interesting.

  According to a preferred embodiment of the invention, the plastic element is integral with the sliding shutter controlling the suction air leakage rate, the window being stationary.

  Other features and advantages of the invention will become apparent from the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples.

  Figure 1 is a perspective view of the butt of a vacuum cleaner in which the opening control of the air leak is in the open position.

  Figure 2 is an exploded view of the air leak opening control box with its main components.

  Figure 3 illustrates in an exploded view the components of the opening control of the air leak.

  Figure 4 is a side view of the light conductor.

  Figure 5 illustrates a bottom view of the light conductor.

  FIG. 6 shows a view from above and a section along A A 'of the opening control of the air leak and in particular a detail of the wave conductor in section.

  Figure 7 is a perspective view of the butt of a vacuum cleaner in which the control of opening of the air leak is in the closed position.

  As shown in FIG. 1, a vacuum grip 1 comprising a visual light conductor power indicator according to the invention consists of a system for controlling the suction air leakage 2 placed in the vicinity of the grip of the stick. The adjustment of the air leakage and thus of the suction power is thus easily controlled manually by means of a button 10.

  As shown in Figure 2 in an exploded view, the suction air leakage control system 2 comprises three elements: a housing 4, a control member 5, a foam 7.

  In a conventional manner the control of the suction air leakage is carried out by means of a sliding shutter 8 incorporated in the casing 4 and arranged between openings 9 of the casing and an opening formed in the tube 3, substantially opposite the openings 9. Said casing is encased at the top of the suction tube on the butt of the vacuum cleaner.

  More specifically, the casing 4 is fixed on the tube of the vacuum cleaner and on the butt by clips, said casing contains the control member 5 guided for its sliding by the rails 6. As shown in FIG. 2, said rails 6 are arranged in the upper part of the housing.

  The control button 10 is thus arranged, on the top of the housing 4, in the rails 6, by clipping. It comprises lugs 101 engaging, beyond the rails 6, with complementary grooves 81 formed in the flap 8, as can be clearly seen in FIG.

  Subsequently, a foam 7 is located on the aeraulic path, between the openings 9 and the opening of the tube 3.

  Thus, the flap 8 of the control member, when it is in the closed position, completely covers the foam 7, prohibiting any entry of air into the suction duct. When the control member 5 is in the open position, the flap 8 is removed and the foam is positioned directly under the openings 9, allowing the passage of the leakage air.

  The foam 7 reduces the whistling caused by the suction of air through the openings 9 when the flap 8 is in the open position or in the intermediate position. Effort has indeed been made to reduce the noise caused by the passage of the leakage air, not only by the presence of the foam 7, but also by the presence of the multiple openings 9, and their extent, this distribution of the air in the openings also contributing to reduce noise.

  The leakage air flow varying the suction power of the vacuum cleaner is regulated by means of the control knob 10 actuated by the thumb of the user, which button is secured to the flap 8 in the control member 5, as shown in Figures 2 and 6.

  When the control knob 10 is moved back to the maximum, that is to say in the position of FIG. 1, the shutter 8 does not obstruct the openings 9 made in the upper part of the casing 4 and the air is sucked up. decreasing the suction power in the pipe 3. This position allows for example the cleaning of curtains, fine fabrics, and generally elements likely to press against suction and obstructing.

  When the control knob 10 is advanced to the maximum, that is to say in the position of FIG. 7, the shutter 8 obstructs the openings 9 and does not generate a draft, the suction power is then maximal at the end of the pipe 3. This configuration of use is mainly used for the cleaning of large surfaces, such as floors, carpets, etc ...

  It is understood that this occasional modification of the suction power 20 can complement a more complex device for modifying the power by modulating the speed of rotation of the motor.

  According to the invention, the suction power indicator which makes it possible to locate the air leakage rate is formed by a light conductor 11 placed at the upper part of the control member 5.

  Said light conductor 11 is in the form of a lamella, which may be straight or slightly curved, of rectangular shape and optionally having fastening means on the control member, such as a clip 111 cooperating with a shape complementary to the flap 8. The latter comprises an opening 82 of size slightly smaller than the size of the light conductor 11, so that the latter bears, by its periphery, on the edges of the opening 82.

  FIG. 4 shows the light conductor in side view and illustrates more particularly the fact that the light conductor is in the form of a thin strip having its two large asymmetrical faces.

  Thus, according to the preferred embodiment of the invention, the top face, visible by the user, is flat, while that from below, facing the suction tube, has reliefs 13 to return the light.

  Indeed, during the manufacture of the lamella constituting the light conductor 11, there are arranged reliefs 13 corresponding to recesses of triangular section made in the lower face of the light conductor 11, which recesses form facets 16 visible Figure 6 .

  Advantageously, reliefs are also produced on the edge of the light conductor, over its entire perimeter, as well as on lines parallel to the short side of the lamella forming the light conductor 11, so as to delimit power intervals. suction.

  These reliefs 13, visible in the sectional view of FIG. 4, in the bottom view of FIG. 5, as well as in detail 14 of FIG. 6, are arranged to send the light back to the user, in the manner of an optical mirror, by simple reflection on facets 16 inclined constituting the reliefs.

  Thus, the light propagating in the lamella 11 will preferentially come out of this lamella during its reflection on the inclined facets 16 of the reliefs 13, as indicated by the examples of propagation of the light illustrating FIG. 4. Some light rays are thus reflective and oriented towards the user.

  FIG. 6 more precisely illustrates the control member 5 in plan view and in section and the positioning of the lamella forming the light conductor 11.

  A detail 14 of the sectional view shows the placement of the light conductor 11 on the control member 5 and in particular the fact that there is arranged a free space 15 under the light conductor 11 between the lower face with reliefs 13 and the corresponding part of the element carrying the sliding shutter.

  This free space 15 makes it possible to return part of the light in the conductor, so as to optimize the reflection of the light waves towards the outside.

  The light concentrated in the areas of the facets 16 is presented to the user in the form of transverse bars more intense relative to the rest of the light conductor, these light bars materializing the suction power.

  In fact, it is possible to envisage multiple means for visualizing the level of suction power by making modifications of the surface of the light conductor, for example by laser etching or during the formation of plastic molding.

  In general, a suitable relief on the lower surface of the light conductor reflects the latter and this reflection is more effective if it occurs at an interface between the air and the light-conducting plastic rather than 'between the light conductor and another plastic.

  So that the reflection of light from the light conductor 11 to the user of the vacuum cleaner is maximum it has been found that the reliefs 13 must preferably comprise facets inclined at 45 relative to the vertical, it is that is to say with respect to the direction perpendicular to the large faces of the light conductor, the reliefs 13 being located on the underside of said light-conducting lamella.

  As is clearly visible in FIG. 5, the periphery of the light guide 11 also has inclined facets, preferably at 45, and forming a point, so as to return the light towards the inside of the light guide.

  The etching of numerical indications would likewise be carried out on the lower face of the light conductor 11 with triangular or trapezoidal engraved sections, as is done for example for the printing forms used in gravure or intaglio printing.

  According to the invention, the light serving to indicate the suction power is the natural light for displaying the suction power, this light radiating the upper face of the light conductor. This avoids a costly specific device using a diode and its control device and power supply.

  The housing 4, the shutter 8 and the control knob 10 are made of molded plastic, rigid and lightweight.

  The light conductor 11 is a specific polymer for this application. Such plastics are manufactured for example by Bayer and shaped in a known manner in fields for obtaining optical fibers and various products.

  In operation, when the user moves the button 10 from the open position shown in Figure 1 to the closed position shown in Figure 7, the control member 5 slides along the rails 6, the light conductor 11 integral with the shutter 8 also moves. During this movement, a larger and larger surface of the light conductor becomes visible through the window 12 arranged in the upper part of the casing 4, indicating to the user that the suction power increases.

  According to a preferred embodiment of the invention, a min / max type index is arranged at the level of the light guide, on the housing 4, so that the user easily identifies the opening of the leak.

  To further guide the user in the appropriate setting of the air leakage according to the floor to be cleaned, it can be expected to make the control button 10 transparent and have, on the housing 4, between the rails 6, c that is to say in the sliding zone of the button 10, pictograms showing different surfaces and judiciously positioned so that the user, by arranging the button 10 next to the pictogram, does or does not realize an appropriate air leak for the floor to clean. For example, it may be arranged three pictograms: a pictogram of curtains or curtains located at the stop of the control knob 10 to the right according to Figure 2 and corresponding to a maximum leak, a pictogram showing a smooth floor substantially in the middle of the sliding of the control button 10 and corresponding to a significant air leakage, - a pictogram of a carpet or carpet, and located at the stop of the control knob 10 to the left according to Figure 2 and corresponding to a closure of the air leak.

  Such pictograms are illustrated in Figure 2.

  Many other variants are possible for the indicator of suction power by light conductor without departing from the scope of the invention. It may for example be envisaged other lamella shapes and different thicknesses, the facets for returning the light may be more or less numerous and more or less wide and spaced, the inclinations of the facets may be variously chosen.

  It can also be imagined to print indications on the upper face of the slats or even to engrave, on the lower face, figures indicating the level of suction, which engraved numbers are then also bright. Alternatively or additionally, letters, and / or acronyms, and / or pictograms representing the different types of soil to be cleaned can be envisaged without departing from the scope of the present invention.

  The light conductor is preferably tinted and it can be considered different colorations according to the code that is desired to adopt vis-à-vis the user of the vacuum cleaner, green or red, for example.

  Of course, the invention is not limited to the embodiments described and shown by way of example, but it also includes all the technical equivalents and their combinations.

  It may in particular be considered to make the plastic element 11, not integral with the sliding shutter, but fixed, the window then being connected to the sliding shutter. The relative movement of the plastic part relative to the window is then achieved by moving the window above the indicator, which remains fixed.

  Furthermore, the sliding, illustrated in translation according to the proposed example, can also be implemented in rotation, with the aid of an appropriate command. Based on the example illustrating the invention, the knob 10 can thus be provided for sliding on transverse curved rails, the sliding shutter 8 taking up the curved shape of the tube constituting a sector which covers or gradually uncovers the light conducting plastic element according to the rotation of the control knob.

Claims (10)

  1. Visual indicator of the suction power of a vacuum cleaner carried by a control member (5), which control member (5) for adjusting the flow rate of a suction air leak is contained in a housing (4) positioned on the butt of the vacuum cleaner. Said visual indicator is characterized in that it consists of a light-conducting plastic element (11) shaped to return the light towards its upper face, in preferred positions, by the fact that the plastic element (11) ) is opposite a window (12) arranged in the upper part of the housing (4), in that it is in relative movement with respect to the window (12) when a sliding shutter (8), controlling the flow rate of the suction air leak is actuated by the control member (5) so as to indicate the suction level by the visible part of the plastic element (11).   2. Visual indicator of the suction power of a vacuum cleaner according to the preceding claim, characterized in that said plastic element is integral with the sliding shutter (8) controlling the suction air leakage rate, the window ( 12) being motionless.   3. Visual indicator of the suction power of a vacuum cleaner according to one of the preceding claims, wherein the light conductor (11) is in the form of a thin strip having its two large asymmetrical faces.   4. visual indicator of the suction power of a vacuum cleaner according to claim 3 wherein the upper face, visible to the user, is flat and the lower face has reliefs (13) constituting privileged positions of return of the light.   5. visual indicator of the suction power of a vacuum cleaner according to claim 4 wherein there is arranged a free space (15) under the light conductor (11) between the underside with reliefs (13) and the part corresponding element of the element carrying the sliding shutter (8).   6. visual indicator of the suction power of a vacuum cleaner according to claim 4 wherein the reliefs (13) correspond to recesses of triangular sections formed in the underside of the light conductor (11), which recesses form facets (16).   7. The visual indicator of the suction power of a vacuum cleaner according to claim 6 wherein the angles of the facets (16) relative to the vertical are substantially 45, which vertical corresponds to the direction perpendicular to the large faces of the driver. light (11).   8. A visual indicator of the suction power of a vacuum cleaner according to claim 4 wherein the reliefs (13) are located on the edge of the light conductor, on its entire perimeter, and on lines parallel to the short side the lamella forming the light conductor (11) so as to define intervals for indicating the suction power.   9. visual indicator of the suction power of a vacuum cleaner according to claim 4 wherein the reliefs (13) are formed by etching or molding and represent numbers and / or letters, and / or acronyms, and / or pictograms representing the different types of soil to be cleaned.   10. Visual indicator of the suction power of a vacuum cleaner according to any one of the preceding claims using natural light for displaying the suction power and requiring no energy source.