AT513708A1 - Shopping venture - Google Patents

Abstract

The present invention relates to a shopping cart, comprising a shopping cart (1) with a handle bar (2) and at least three wheels (3) on its underside, and optionally a locking chain (4) and a deposit lock (5) for connecting the shopping cart with another of the same type, with the characteristic that the shopping trolley is provided with a docking station (6) for a portable electronic device, comprising a voltage source (8), means (9) for transmitting energy from the voltage source (8) to the device, and optionally a holder (7) for the device.

Description

The invention relates to a shopping cart with a connection possibility with a portable electronic device.

BACKGROUND OF THE INVENTION

For a long time, small specialty stores have been increasingly displaced from the market and today are largely served by supermarkets, e.g. Food or hardware stores, replaced. These are becoming ever larger, making it increasingly difficult for customers to navigate such huge businesses. While most large supermarkets and hardware stores have guidance systems in the form of color codes for specific departments or even shelf markings, they are often not sufficiently recognizable from a distance, especially for people with visual impairments.

In addition, in recent years, it has become customary to provide certain goods or goods labels with a so-called QR code ("quick response code") provided by a camera-equipped portable electronic device such as a mobile phone or portable PC (eg notebook, netbook or tablet PC) can be read and provides additional information about the goods for the customer. Due to the ever-increasing distances and the correspondingly increased residence time in the supermarket, however, it often comes to premature draining of the battery of the device.

On the other hand, the need to deposit a deposit in a shopping cart with a locking chain and a deposit lock in order to be able to detach a cart from the shopping cart queue occasionally poses a problem if the customer does not have a corresponding coin - especially if the shopping cart queue is far from the shopping cart next checkout of the supermarket is removed, eg in a parking lot.

The aim of the invention was therefore to at least partially solve the above problems. While parallel applications by the inventor relate to a process for directing a customer through a business and a new deposit lock, the present case is 2/23 -1 - • · · · ············································································ Log in with the power consumption problem Mobile phones / PCs, but in this context also with the deposit system.

DISCLOSURE OF THE INVENTION

The above object is achieved by providing a shopping cart comprising a shopping cart with a handle bar and at least three wheels on its underside and optionally a locking chain and a deposit lock for connecting the shopping cart to another of the same type and having the feature of the invention on the shopping cart a docking station for a portable electronic device is provided, which comprises a voltage source, means for transmitting energy from the voltage source to the device and optionally a holder for the device.

On such a shopping cart of the invention, the customer can thus charge the battery of his portable electronic device. This can be either wireless, i. by means of induction charging or by connection to a connection of the docking station for the device. In the former case, the docking station need not include a holder for the device, since the charging of the battery can also take place when the customer carries the device on the body, as long as it is in sufficient proximity to the voltage source. Preferably, however, the docking station comprises a holder into which the device can be inserted or inserted, or even placed on it, in order to allow the battery to be charged by the voltage source of the shopping cart during the shopping.

The type of shopping cart is not particularly limited, and there are all the usual models of shopping carts with a docking station according to the invention can be equipped. However, for some preferred embodiments of the invention, certain parts of the shopping cart, e.g. the lock to customize, as will become apparent from the following description. 3/23 -2-

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The portable electronic device is preferably a mobile phone, e.g. a smart phone, or a tablet PC, although, for example, laptops, notebooks or netbooks with physical keyboard are included in the invention, provided that they are replaceable in the holder of the docking station and connectable to the power source. The ability to view the screen of the device and possibly also to operate the device while it is in the holder is, of course, given above all for mobile phones and tablet PCs. The term Tablet PC, however, not only the usual "tabs", such. the " iPad " from Apple or the " Galaxy Tab " from Samsung, but also laptops with removable screen, which is then usable as a tablet PC.

Under the term " docking station " is a charging or docking station for the electronic device with appropriate connections or connection options (ie sometimes wireless) to understand a voltage source and optionally a built-in docking station data storage, which preferably also includes a holder, in or on the device - or laid on or set and preferably can be locked in this position. Thus, in any case, the docking station serves to charge the device battery, but may additionally be able to store data, such as data. Advertising or a map of the store to dub into the memory of the docked device. For this purpose, the docking station preferably comprises a data memory, in particular a memory chip. However, alternatively or additionally, it may also be equipped with a receiver capable of receiving data from an external data source, e.g. from a server of the business, to receive and forward to the docked electronic device.

The voltage source of the shopping trolley according to the invention may be a simple battery, but is in particular an accumulator, which itself is rechargeable, which preferably takes place when the shopping trolley is reconnected to the shopping trolley queue. Shape and dimensions of the battery or the accumulator are not particularly limited. Preferably, however, they are such that the power source can be accommodated within the handlebar of the shopping cart. Of course, the voltage should be selected so that the rechargeable batteries -3- 4/23 ······················· ·················································· • Most portable electronic devices that are currently most commonly Li-ion rechargeable batteries with 3, can be recharged. • · · · · · ········································································ 7V voltage are.

As mentioned above, the energy transfer for charging the battery of the portable electronic device via a power line or wirelessly done. In the former case, the energy transfer means preferably comprise an electrical connector (hereinafter referred to simply as a connector), most preferably a connector that conforms to a standard accepted by many manufacturers of laptops, tablet PCs and smartphones. At present, such a connector is therefore particularly preferably a USB connector, for mobile phones, in particular, a connector corresponding to the micro USB standard. Not only energy but also data can be transmitted via such a plug.

The plug can either be fixed, i. immovable, provided at the docking station or connected via a cable to the voltage source, e.g. a cable automatically wound on a reel or tightly tensioned. The connection via a cable offers more freedom with regard to the position and shape of the holder then preferably provided, in particular with regard to the distance of the portable electronic device inserted in the holder from the handle bar and the position of the power connection, e.g. of the USB port on the device, which may be provided for example on smartphones, depending on the model, on the side or at the bottom of the device.

For wireless energy transfer to the portable electronic device, i. Induction charge, the energy transfer means preferably comprise an electric field generator connected to the voltage source. For this purpose, the portable electronic device must be equipped with an induction coil, such as has recently been offered by several smartphone manufacturers in their devices, e.g. in the lid of the battery compartment. Again, of course, the voltage of the voltage source and the electric field generated by the generator should be matched to the device batteries, to which the average person skilled in the art will be able to do without undue experimentation. -4- 5/23 • · · · · · · · · · «· · · · · · · · · · · · · · · · · · · · · · · · ··· · ·

In order not to restrict the functionality of the shopping cart and to ensure easy access to the shopping cart, but also to ensure good visibility and possibly operability of the portable electronic device after docking, the holder of the docking station is preferably mounted on the handle bar of the cart and can be centrally or also be provided on the left or right edge.

As mentioned above, the voltage source is preferably itself an accumulator which is chargeable by energy transfer from an external voltage source. This loading is preferably done after the cart has been returned to its designated place in or in front of the store, again either via a power line or wirelessly. In a preferred embodiment, the battery can be charged after the shopping cart, which in this case has to have a safety chain and a deposit lock, has been connected to a shopping cart queue via the safety chain, the safety chain simultaneously acting as a power line for transmitting energy from the external voltage source serves the accumulator of the shopping cart. Alternatively or additionally, however, the voltage source of the docking station can also have an induction coil and be charged wirelessly from the external voltage source. For this purpose, an electric field generator is preferably provided in the area of the shopping trolley snake at the space provided.

The charging of the accumulator as a voltage source can, however - in addition to or as an alternative to the options described above - also take place when the shopping cart is moving, namely by providing one or more wheels with electric generators for charging the accumulator, which convert the kinetic energy into electrical energy. In this case, the generators serve as " external power source ".

In embodiments of the shopping cart with locking chain and deposit lock according to the invention, the deposit lock is preferably not - or not only - by inserting a deposit, such as a deposit coin, in a corresponding Schlit - 5- 6/23 th and insertion of the carriage in the lock, but (Also) unlocked by inserting the portable electronic device in the docking station. Thus, the customer is no longer dependent on the carrying of a suitable deposit, but can solve the shopping cart using his mobile phone or other portable electronic device from the shopping cart snake.

This can be realized in different ways: in a purely mechanical way or by means of electrical signals. In the former case, for example, when docking the portable electronic device to the docking a mechanical switch can be operated, which is preferably provided on the underside of the plug and is pressed when docking, thereby over a - preferably within the handlebar of the shopping cart running - linkage the lock the locking chain is released.

Preferably, however, the unlocking of the locking chain via electrical signals, for which purpose in two particularly preferred embodiments, two things is provided: i) The docking station comprises a detector which is capable of inserting the portable electronic device into the holder and / or connecting the device with the plug and then send out an electrical signal to the deposit lock. In the latter case, detection may be made when an electrical connection is made between the portable electronic device and the voltage source, i. that is, when the device is connected to the plug, whereupon a control unit integrated in the detector generates an electrical signal. Or it can in turn be actuated by inserting the device into the holder and / or by placing the plug on a switch, which in this case, however, does not activate a mechanism, but emits an electrical pulse. For this purpose, the switch may for example comprise a piezoelectric element, e.g. piezoelectric ceramic, which generates a stress when pressure is applied. In any case, the detector emits an electrical signal to the deposit lock. Such piezoelectric elements are commercially available as piezo switches, sensors, probes and actuators, e.g. by Danielson in Harden- 7/23 -6- ·························································································· Berghof (NL), Meggitt Sensing Systems of Friborg (CH), PCB Piezotronics Inc. of Depew (NY, USA) or the Kistler GmbH in Vienna (AT). ii) The deposit lock incorporates, in addition to or in addition to the conventional slide with the deposit for the deposit, an electromagnetic latch mechanism which, upon receipt of a corresponding signal, unlocks the detector and releases the lock chain. Especially if the lock has no conventional slide, this is a series of conventional Elektroschlössem (for example, with one or two horizontally displaceable Treibriegeln) in question, of which the average expert readily select a suitable, the bolt to the shape of the locking chain, or vice versa , adapt and mount on a shopping cart.

Depending on the embodiment, suitable deposit locks are either already commercially available or, starting from existing locks, can be adapted relatively easily to the requirements of the present invention. For example, both mechanical and mechanical-electric deposit locks are available from Systec POS-Technology GmbH in Puchheim near Munich (DE), or from Wanzl Metallwarenfabrik GmbH in Leipheim (DE). In addition to deposit locks, the latter also offers, for example, RFID tracking and wheel locking systems for shopping carts.

The type of mounting of the docking station is generally not particularly limited as long as the portable electronic device can be carried thereon or secured against being dropped or dropped. For example, the mount may be a simple three-dimensional linkage or grid, e.g. a basket, or a frame, each of which should have sufficient rigidity and in which the portable electronic device can be inserted or inserted. Preferably, however, it comprises a flat surface, e.g. a plate, which may in turn be designed as a grid on which the portable electronic device can be placed, after which a locking of the device by means of one or more, mounted on the plate, displaceable or rotatable latch can be done to the device in the holder to fix. 8/23 -7- ··· · ···· ······································· · · · · ··········· · ·

The holder is preferably mounted on the shopping cart, in particular on the handle bar, such that the display of the docked portable electronic device is easily visible to the user, i. particularly preferably has an inclination angle between 30 ° and 60 °, more preferably of 45 °. In particular, the angle of inclination may also be variable in order to be able to adapt it to the size of the customer. For this purpose, for example, the holder can be rotatably mounted slidably mounted on a circular cross-section in the vertical cross-section handle bar, wherein the rotation can be varied by means of screws, i. the holder can be locked after twisting in its new position.

Generally, the manner of attaching the portable electronic device holder to the shopping cart, especially the handle bar, is not particularly limited. It may be movably or rigidly mounted, for example, as shown in the figures, by means of preferably about the rod axis rotatable mounting rings, clamps or clips, about a firmly screwed or welded to the cart or the handle bar linkage, or by means of direct screwing, Welding or bonding with the cart or the handlebar. All parts of the holder are preferably made of plastic or light metal or a combination thereof, which ensures low production costs while maintaining sufficient stability. In preferred embodiments, the mount is adjustable in size to accommodate a variety of types and dimensions of portable electronic devices. Preferably, the holder is adjustable in size both in the horizontal and in the vertical direction.

A particularly preferred embodiment of the holder comprises two movable on a movable rod, horizontally displaceable L-profiles, which together form a frame for the portable electronic device. Each of the L-profiles may have on its underside a planar sub-element, which are not in the same plane, but together form a support for placing the portable electronic device. In use, the portable electronic device with at least two of its edges on the two planar sub-elements 9/23 -8- ··· ············································ ································································································································································································································ until they tightly enclose the four edges of the portable electronic device. The linkage may be biased by means of one or more springs to be pushed or pulled by these springs to a starting position, which may correspond to either the minimum or maximum distance of the L-profiles.

Such an embodiment is particularly suitable for smartphones and tablet PCs, on the one hand a flat design and on the other hand have a sufficient size to rest in the open initial state of the holder with at least two edges on the two flat sub-elements. In this opened initial state, the inner edges of the two planar sub-elements therefore, for example, a distance of a maximum of 10 cm to hang a conventional smartphone, while the opposite legs of the two L-profiles in the open initial state a longitudinal distance of at least 25 cm and a Width should be at least 20 cm apart in order to insert the largest popular tablet PCs in the holder can.

The L-profiles may in turn also consist of two halves connected together by a linkage, which are displaceable in the vertical direction to each other in order to vary the thickness of the frame formed by the two L-profiles can. The vertical cross-sectional shape of the L-profile halves is preferably also L-shaped and more preferably that of a quarter-circle to firmly enclose the portable electronic device without damaging the edges, i. depress or scratch. For the same reason, the L-profiles are preferably made of a resilient plastic material, e.g. Hard rubber, or their insides are lined with such material.

Of course, the components of the linkages on which the two L-profiles are mounted and / or those on which the two halves of an L-profile are mounted must also be movable relative to one another to move the profiles or profile halves toward or away from each other to be able to. For this purpose, they may be removed. 9 ···································································································································· side by side or with each other (e.g., in the form of scissor levers or lever-and-spring constructions) or telescoped (e.g., telescopically) depending, inter alia, on the difference between the minimum and maximum spacing of the ends. For example, for the vertical displacement of the two halves of an L-profile, two telescoping rods are suitable, since here only a distance difference of a few centimeters, e.g. 2 to 4 cm, needs to be covered. With a maximum distance of 4 cm, even the thickness of a conventional laptop can easily be enclosed by the L-profile halves.

In further preferred embodiments, the holder additionally comprises a locking mechanism for fixing the portable electronic device therein. This locking mechanism should be unlockable in a simple mechanical manner, e.g. by pushing a button or operating a lever, but preferably by inserting a pin or similar component, e.g. in key shape, which is removable after the locking mechanism from the holder (or elsewhere in the shopping cart) and can be stored separately from the shopping cart. This is an anti-theft device for the portable electronic device, so that the customer can calmly make his purchase without having to always have the shopping cart in view.

Moreover, such a locking mechanism is also useful in cases where unlocking of the deposit lock is possible by docking the portable electronic device, ie where the portable electronic device replaces the deposit to release the shopping cart from the shopping cart queue, be it the lock in addition, can be unlocked in a conventional manner by introducing a deposit or not. In both cases, it may be provided that the locking mechanism, which locks the portable electronic device in the holder, is only solvable if the locking chain of another car - or, if possible, additionally a deposit, that is about a coin - is introduced into the deposit lock. This prevents the shopping cart from being made available to the customer even after removal of the portable electronic device from the docking station even without a pledge -10- 11/23 •······································ · · · ········································································································································································································································· to get back his deposit (usually a coin). In cases where the shopping cart is moved with an electronic security system that effectively prevents the cart from moving a certain distance away from the store or over a trigger line (e.g., an underground antenna cable), e.g. equipped with a Rocateq wheel claw or a Wanzl " Radlok " system, however, the sled may be omitted entirely for a conventional deposit.

BRIEF DESCRIPTION OF THE DRAWINGS

Non-limiting preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings which schematically illustrate:

Fig. 1 shows an overall schmeature view of a shopping cart of the invention;

Fig. 2 shows an enlarged detail view of an embodiment of the docking station;

Fig. 3 shows a partially broken view of a portion of the handle bar of a shopping trolley according to the invention; and

Fig. 4 shows a preferred embodiment of the holder for the portable electronic device.

DETAILED DESCRIPTION OF THE INVENTION

In Fig. 1 is an overall view of a shopping cart according to the invention is shown. This comprises a shopping cart 1 with a handle bar 2 and four wheels 3 (of which only three are visible in the drawing) on its underside, a locking chain 4 and a deposit lock 5 for connecting the shopping cart with another of the same type. On the handle bar 2, a docking station for a portable electronic device is provided, which includes a holder 7 for the device, a (not shown here, because housed in the handlebar 2) voltage source and means -11-12 / 23 • · · · · · · · · · · · · · · · · ···· · · 9 for power transmission from the power source to the device. As a power transmission means 9, a plug 9a is shown schematically in Fig. 1, which is connected via a cable 9b to the voltage source.

Fig. 2 shows an enlarged detail view of a relatively simple embodiment of the docking station, in which the holder 7 is designed as a mesh basket, in the above from the portable electronic device, in this example, a smartphone, can be introduced. With 9a and 9b again the connector, here a microUSB connector, or the cable for connecting the connector with the voltage source are designated. The latter is again housed in the handle bar 2 and therefore not shown. The cable 9b exits the handlebar 2 through an opening 2a. Preferably, inside the bar 2, there is also a retractor, on which the cable 9b is automatically wound after the plug 9a has been removed until the plug 9b abuts the opening 2a, or tightens the cable 9b after the plug 9a was plugged into the portable electronic device.

In Fig. 2, the cable 9b is shown only partially pulled out of the handle bar 2. This length would be sufficient if the micro USB port of the smart phone is provided at the bottom of the device. If, on the other hand, it is located on a lateral edge, the cable 9b must be pulled further out in order to be able to establish a connection with the plug 9a. This documents the advantage of a connector 9a connected to the voltage source via cable 9b with respect to a connector mounted on the outside of the handlebar 2.

The holder 7 is fastened in the embodiment shown here with two mounting rings 7a on the handle bar 2. The rings 7a are preferably in sliding connection with the handlebar 2 in order to be able to adjust the inclination angle of the holder 7 by turning it around the horizontal axis passing through the center of the handlebar 2 in a user-dependent manner. The bracket 7 and the rings 7a are preferably made of plastic, e.g. Polypropylene, or light metal, e.g. Aluminum, and are further preferably integrally connected together, i. welded. -12- 13/23 ··· «# ··· ···· ·················································································· · · · · · · · · · · · · · · · ··· ·

The mounting rings 7a are preferably at its bottom, similar to a pipe clamp, divided and provided with vertical projections with through holes through which passes a screw by means of which (and a corresponding nut), the strength of the seat of the holder on the handle bar is adjustable. The through-holes may also comprise a milled or welded thread, in which case the mounting rings are preferably made of metal. Particularly preferably, in this case, the holder 7 itself made of metal and is welded to the rings 7a.

Fig. 3 is a partially broken view of a portion of the handle bar 2 of an embodiment of the shopping cart according to the invention. It can be seen that a voltage source 8 is housed within the handle bar 2, shown here as a cylindrical ^) battery or accumulator. The battery or the accumulator is connected via two contacts to a control circuit 8a - here indicated as a round board to which in turn the cable 9b of the plug 9a is connected, which in turn exits through an opening 2a from the handle bar 2.

The control circuit 8a may additionally comprise a line which connects it to the deposit lock of the shopping cart, so that the accumulators 8 can be charged from an external voltage source via the (electrically conductive) blocking chains of the individual shopping carts in a shopping cart queue.

In Fig. 4, finally, the underside of a preferred embodiment of the holder 7 is shown. This comprises two L-profiles 7b, on the inner edge of each of which a grid 7c is provided, which serves as a flat support surface for the portable electronic device. The two L-profiles 7b are interconnected on their underside (ie, the side facing away from a docked portable electronic device) via a linkage consisting of two rods 7d and 7e, of which rod 7d is hollow and has an inner diameter slightly larger than the outer diameter of the rod 7e, so that rod 7e can be inserted into rod 7d. In this way, the two rods 7d and 7e can be displaced relative to each other, as indicated by the double arrow, what the Ge - 13- 14/23 ··· · ········· ···· ·· The overall length of the linkage changes and a corresponding relative movement of the linkage changes causes two L-profiles 7b to each other.

The height of the L-profiles 7b in the vertical direction, i. normal to the plane of Fig. 4, is preferably at least about 1 cm. Preferably, the grids 7c are at a maximum half height of the profiles and / or are attached to the underside thereof. That is, they are preferably each clamped in a (provided at the appropriate height) groove in the inner wall of the L-profile, -gegossen, -welded or -glued. When the grids 7c are fixed to the bottom of the L-profiles 7b, i. glued, screwed or -welded, the vertical distance of the thicker rod 7d to the other L-profile must be sufficient so that rod 7e can be inserted freely into rod 7d without the grating 7c blocking the movement.

A preferred embodiment may be to attach a grid 7c to the underside of an L-profile while the other is fastened in a groove of the other L-profile. Thus, the two gratings 7c lie in different planes and do not obstruct the movement of the L-profiles 7b towards each other.

For docking e.g. a smartphone or tablet PC to a docking station with such a holder as shown in Fig. 4, the device is placed with its edges in parallel alignment with the legs of the L-profiles on the grid 7c, after which the two L-profiles 7b by external Pressure with both hands towards each other until all four legs of the L-profiles 7b abut the edges of the device.

In preferred embodiments, a locking mechanism may be provided on the linkage, which prevents its activation further movement of the two rods 7d and 7e, as long as it is not released again. In the embodiment of the support shown in Fig. 4, the locking mechanism may simply comprise a non-slip material secured to the outer rod 7d, e.g. Hard rubber, existing clamp (clip), which is attached to both sides of the joint between the two rods 7d and 7e. -14- 15/23

Claims (16)

ft · · · fff «fff ♦ ······· tt ····················································································································· Patent claims 1. Shopping cart, comprising a shopping cart (1) with a handle bar (2) and at least three wheels (3) on its underside, and optionally a safety chain (4) and a deposit lock (5) for connecting the shopping cart to another of the same type in that the shopping cart is provided with a docking station (6) for a portable electronic device which has a voltage source (8), means (9) for transmitting energy from the voltage source (8) to the device, and optionally a holder (7) for the device includes. 2. Shopping cart according to claim 1, characterized in that the portable electronic device is a mobile phone or a tablet PC. 3. Shopping cart according to claim 1 or 2, characterized in that the voltage source (8) is a battery or an accumulator. 4. Shopping cart according to one of claims 1 to 3, characterized in that the voltage source (8) is housed within the handle bar (2). 5. Shopping cart according to one of the preceding claims, characterized in that the energy transmission means (9) comprise an electrical connector (9a). 6. Shopping cart according to claim 5, characterized in that the plug (9a) is a USB plug. 7. Shopping cart according to claim 5 or 6, characterized in that the plug (9a) via a cable (9b) to the voltage source (8) is connected. 8. Shopping trolley according to one of claims 1 to 4, characterized in that the energy transfer means (9) one verbunde- with the voltage source (8) -16- ········ ···· · ····· English:. German: v3.espacenet.com/textdoc? on the portable electronic device. 9. Shopping cart according to one of the preceding claims, characterized in that a holder (7) is provided, which is mounted on the handle bar (2) of the shopping cart (1). 10. Shopping cart according to claim 3, characterized in that the voltage source (8) is an accumulator which is chargeable by energy transmission from an external voltage source. 11. A shopping trolley according to claim 10, characterized in that the shopping trolley comprises a locking chain (4) and a deposit lock (5) and the locking chain (4) at the same time for energy transmission from the external power source to the voltage source (8) of the shopping cart. 12. Shopping cart according to one of the preceding claims, characterized in that the shopping cart comprises a locking chain (4) and a deposit lock (5) and the deposit lock (5) by inserting the portable electronic device in the docking station (6) can be unlocked. 13. Shopping cart according to claim 12, characterized in that i) the docking station (6) has a detector for detecting the insertion or insertion of the portable electronic device into the holder (7) and / or connecting the device to the electrical plug (9a) wherein the detector is capable of emitting an electrical signal to the deposit lock (5) upon detection of such insertion or connection, and ii) the deposit lock (5) comprises an electromagnetic latching mechanism which upon receiving a corresponding signal from the detector Lock chain (4) unlocked. 14. Shopping cart according to one of the preceding claims, characterized in that the holder (7) is adjustable in size. -17- 17/23 ·· «· · ·« · ······································································ 9 * ♦ · · I · · · · # ·· · «· · · · · · 15. Shopping trolley according to one of the preceding claims, characterized in that the holder (7) comprises a locking mechanism for fixing the portable electronic device therein. are. 16. Shopping cart according to one of the preceding claims, characterized in that the voltage source (8) is an accumulator and the wheels (3) provided with electric generators for charging the accumulator during movement of the shopping cart Frank Tilbürger represent dj, sypl & Ellmeyer KG '-18- 18/23