SHOPPING CART AND SHOPPING PAYMENT SYSTEM

Abstract

A shopping cart (1), comprising: a chassis (2) having a plurality of rollers (3), the chassis (2) comprising a vertically extending portion (2a) and a flat horizontally extending portion (2b); a vertical frame (4); a handle (5) for handling the shopping cart (1), the handle (5) being arranged on the vertical frame (4); a shopping item receiving element (10) for receiving at least one shopping item; at least one first load cell (9a) mounted on the vertically extending portion (2a) of the chassis (2); at least one second load cell (9b) mounted on the flat horizontally extending portion (2b) of the chassis (2), the shopping item receiving element (10) being mounted on the first load cell (9a) and on the second load cell (9b).

Description

TECHNICAL FIELDThe present invention relates to a shopping cart and a shopping payment system unit with a stationary payment station.Background ArtThe general background of this invention is a shopping cart commonly used in supermarkets.Shopping trucks, particularly manual shopping trucks without electronic components, are often used around and widely in supermarkets or stores throughout the world. Manual shopping carts are generally useful for transporting shopping items, e.g., food, from their store locations in the store to the cash register. However, manual shopping carts do not provide information, e.g., product information, guidance information, payment or pricing information, or advertising to support the customer during the shopping process.It is therefore an object of the present invention to provide a shopping cart that supports and assists the customer during the shopping process.This object is achieved by the features of the independent claims. Preferred embodiments are set out in the dependent claims.SUMMARY OF THE INVENTIONIn one aspect of the invention, there is provided a shopping cart comprising: a chassis having a plurality of rollers, the chassis comprising a vertically extending portion and a flat horizontally extending portion; a vertical frame; a shopping article receiving member for receiving at least one shopping article; at least one first load cell mounted to the vertically extending portion of the chassis; at least one second load cell mounted to the flat horizontally extending portion of the chassis, the shopping article receiving member mounted to the first load cell and to the second load cell.The load cells could also be referred to as load cells.In another aspect of the invention, there is provided a shopping cart comprising: a chassis having a plurality of rollers; a vertical frame; a shopping article receiving member for receiving at least one shopping article; at least one first load cell mounted on the chassis; at least one second load cell mounted on the chassis, the shopping article receiving member mounted on the first load cell and on the second load cell, the first load cell being mounted at a higher level than the second load cell with respect to a floor level or the floor on which the cart is to be moved.The chassis may include a vertically extending portion and a flat horizontally extending portion.The shopping cart may be any cart or trolley configured to carry or temporarily store items of shopping during a shopping process in a store or self-service store.The shopping cart includes, but is not limited to, a chassis, a plurality of rollers, a vertical frame, and a shopping item receiving member. The handle could additionally be mounted on the vertical frame or the vertical frame can be used as a handle.The shopping cart can be nestable, i.e. a plurality of shopping cart can be pushed into one another in order to store the shopping cart in a space-saving manner.The shopping cart may further include a handle for handling the shopping cart, the handle being disposed on the vertical frame.In another embodiment, the vertical frame and the chassis could be formed integrally or in one piece, but they can also be firmly connected to one another. Thus, stable operation of the carriage is provided, while pushing the carriage on the vertical frame or handle does not affect the weighing process.In another embodiment, the at least one first load cell may be mounted to the rear end or rear portion of the shopping cart, while the at least one second load cell may be mounted to the front portion or front end of the shopping cart.The article receiving member could comprise an upper article receiving sub-member and a lower article receiving sub-member, while the upper article receiving sub-member could also be referred to as an upper basket and the lower article receiving sub-member could be referred to as a lower basket.The upper shopping article receiving sub-element and the lower shopping article receiving sub-element could be coupled to each other via connecting elements which preferably extend vertically or vertically inclined between the upper and the lower shopping article receiving sub-element.By having two load cells coupled together via the connecting elements between the upper basket and the lower basket, many different load distributions can be measured precisely.Thus, very precise weighing can be achieved because the distribution of masses in the cart is unpredictable and severe non-uniformity could be produced by placing a shopping article only in the front portion of the upper basket and / or placing a beer carrier only in the rear portion of the lower basket.The chassis may represent any support or base of the shopping cart on or on which the plurality of rollers enabling the shopping to be movable is arranged. All the rollers of the plurality of rollers may be directly arranged or mounted on the chassis. Alternatively, all the rollers of the plurality of rollers may be indirectly arranged or mounted on the chassis. In this connection, all the rollers of the plurality of rollers are respectively arranged mounted on roller holding elements, wherein these roller holding elements are arranged directly or are mounted on the chassis.Further alternatively, at least some, i.e., one or more, of the rollers of the plurality of rollers may be directly arranged or mounted on the chassis and the remaining, i.e., one or more, rollers of the plurality of rollers may be indirectly arranged or mounted on the chassis. In addition, the vertical frame, the vertical frame holding element, the first load cell and / or the first load cell holding element can be arranged mounted on or on the chassis in each case. In this context, at least one of the vertical frame, the vertical frame holding element, the first load cell and / or the first load cell holding element can be arranged directly or indirectly or can be mounted on the chassis.The vertical frame or frame support member may be disposed within, but is not limited to, the vertically extending portion, e.g., within the S-shape, of the chassis at the vertically highest point of the vertically extending portion of the chassis. The vertically highest point may be interpreted as the upper portion of the vertically extending portion, so it is not necessarily the literal highest point.The vertical frame and / or the vertical frame holding member may be mounted on the upper portion of the vertically extending portion.The first load cell or the first load cell element may be arranged at the vertically highest point of the vertically extending portion of the chassis outside, e.g. outside the S-shape, of the vertically extending portion. The vertical frame, i.e. the lower portion of the vertical frame or the vertical frame holding element and the first load cell or the first load cell element, can be arranged at the same height. In an indirect arrangement or mounting, the vertical frame can be directly connected, arranged or mounted to a vertical frame holding element and / or the first load cell can be directly connected, arranged or mounted to a first load cell holding element, wherein the vertical frame holding element and / or the first load cell holding element can be arranged or mounted directly on the chassis. The vertical frame support member may include one or more connecting members, e.g., through holes or threaded holes, for fixedly and detachably connecting or coupling the vertical frame to the vertical frame support member. The first load cell holding element may comprise one or more connecting elements, e.g. through holes or threaded holes, for fixedly but releasably connecting or coupling the first load cell holding frame to the first load cell holding element.The chassis may be provided or comprise or consist of a single continuous curved tube or frame, e.g. a hollow frame or a tube. Alternatively, the chassis can be provided or comprise a plurality of straight and / or curved tubes, which are connected to one another by welding. The tube may have a cylindrical shape, a triangular shape, a rectangular shape, or a square shape, but is not limited thereto. The diameter of the tube of the chassis may be in the range of, but is not limited to, 1 to 6 cm. The tube may be a hollow tube, a rod, or a tube filled with a material, wherein the material of the tube and the filling material are different, but is not limited thereto. The tube may have a constant diameter, but is not limited thereto. The chassis may be provided or comprise or consist of a metal such as aluminum, iron or steel or an alloy produced therefrom, but is not limited thereto. The chassis may include a vertically extending portion and a flat horizontally extending portion. The chassis may comprise two vertically extending portions and a flat horizontally extending portion. At each end of the flat horizontally extending portion, one of the vertically extending portions may be disposed, but is not limited thereto. The flat horizontally extending portion includes, but is not limited to, a U-shape or a V-shape with respect to the roller contact surface or plane. The flat horizontally running section can be provided in such a way that, in a side view, both the horizontally running sections, in particular the arms of the horizontally running section, and the vertically running section are identical or overlap one another, in particular completely overlap one another. The chassis may further comprise a plurality of connections, in particular connecting pipes, connecting end portions of the continuous pipe and / or connecting the bent pieces of the vertically extending portion to provide additional stability to the chassis. Thus, a very stable chassis is provided which serves as a base for mounting the rollers thereon and for connecting the vertical frame thereto. However, the shopping article receiving member comprising the upper and lower shopping article receiving members may be securely connected to the chassis by interposing the first and second load cells therebetween to ensure precise measurement of the load within or on the shopping article receiving member.The vertically extending portion may represent any portion of the chassis that extends in a vertical direction with respect to a roller contact surface or plane. The vertical direction is perpendicular to the roller contact surface or plane. The roller contact surface or plane may be the contact surface of the roller and the floor. The vertically extending portion of the chassis may extend perpendicular to the roller contact surface or plane, i.e. parallel or substantially parallel to the vertical direction. Alternatively, the vertically extending portion of the chassis may extend inclined to the roller contact surface or plane, i.e., both in the vertical direction and in the horizontal direction. The inclination angle may be in the range of 30° to 89°, but is not limited thereto. The vertically extending portion may be inclined toward the flat horizontally extending portion or may be inclined away from the flat horizontally extending portion. When the vertically extending portion inclines toward the flat horizontally extending portion, the vertically extending portion may at least partially overlap the flat horizontally extending portion. The vertically extending portion may have a height of 100% to 250% of the vertical distance between the roller contact surface or plane and the flat horizontally extending portion. The height of the vertically extending portion is measured from the flat horizontally extending portion. The vertically extending portion may include, but is not limited to, an S-shape, a U-shape, a C-shape, or a Z-shape.The flat horizontally extending portion may represent any portion of the chassis that extends in the horizontal direction with respect to a roller contact surface or plane. The horizontal direction and the roller contact surface or plane are parallel to each other or identical. The flat horizontally extending portion may be completely or almost completely parallel to the horizontal direction. If the flat horizontally extending portion can be almost completely parallel to the horizontal direction, only one, e.g. a portion of the flat horizontally extending portion having a length of 1% to 15% of the total length of the flat horizontally extending portion, inclined toward or away from the roller contact surface or plane, may have an inclination angle of 1° to 20°, and a height of 1% to 50% of the vertical distance between the roller contact surface or plane and the flat horizontally extending portion may be present. For example, the portion, in particular the first portion, may be opposite the other portion, in particular the second portion, of the flat horizontally running portion to which the vertically running portion and the flat horizontally running portion are coupled. The vertically extending portion and the flat horizontally extending portion may be directly coupled, arranged, or mounted to each other. The aspect ratio between the vertically extending portion and the flat horizontally extending portion in the horizontal direction may be, but is not limited to, 1 / 10 to 1 / 2, preferably 1 / 3.The flat horizontally extending portion could have a smaller width at its front portion to allow nesting with another cart. Thus, the width at the rear portion of the flat horizontally extending portion is wider than the width at the front portion.The vertical frame may represent any vertically extending frame. The vertical frame may be coupled to the vertically highest point of the vertically extending portion of the chassis. The vertical frame may be directly or indirectly coupled through or via a vertical frame support member to the vertically highest point of the vertically extending portion of the chassis. The connection of the vertical frame to the vertically highest point of the vertically extending portion of the chassis, in particular to the vertical frame support member, may be fixed, non-rotatable, but is not limited thereto. The vertical frame may be provided or comprise a single continuous curved tube. Alternatively, the vertical frame can be provided or comprise a plurality of straight and / or curved tubes, which are connected to one another by welding. The tube may have a cylindrical shape, a triangular shape, a rectangular shape, or a square shape, but is not limited thereto. The tube may be a hollow tube, a rod, or a tube filled with a material, wherein the material of the tube and the filling material are different, but is not limited thereto. The tube of the frame may have a diameter of 1 to 6 cm, so that the tube of the vertical frame and the tube of the chassis may be different or identical. The tube may have a constant diameter, but is not limited thereto. The vertical frame may be provided or comprise or consist of a metal such as aluminum, iron or steel, but is not limited thereto. The vertical frame may extend perpendicular to the roller contact surface or plane, i.e. parallel to the vertical direction. Alternatively, the vertical frame may extend inclined to the roller contact surface or plane, i.e. both in the vertical direction and in the horizontal direction. The angle of inclination may be in the range of 45° to 89°, but is not limited thereto. The vertical frame may be inclined toward the flat horizontally extending portion or may be inclined away from the flat horizontally extending portion. The vertical frame may comprise a handle or a handle is arranged on the vertical frame. The vertical frame may be decoupled from the first load cell and the second load cell, i.e. the vertical frame and the load cells are not coupled to one another and / or do not touch one another. The vertical frame may be directly or indirectly coupled to the chassis. The outer boundary of the vertical frame can form the lateral outer side of the rear region of the shopping cart, within which the rear region of the shopping article receiving element, in particular of the lower shopping article receiving part element, lies. In other words, the rear portion of the shopping cart may be disposed within the vertical frame.The handle may represent any element or area where the customer or user may grasp the shopping cart to manipulate the shopping cart. The handle may be, but is not limited to, a handle or a handle horn, or a plurality thereof. The handle may comprise or consist of a foam or a plastic, but is not limited thereto. The handle may be fixed to the vertical frame or may be fixedly and detachably attached. The handle can be arranged next to the electronic computing unit, in particular the electronic computing unit can be arranged in a sandwich-like manner between the two handles of the handle. The handle may be part of the vertical frame or may be a separate element directly arranged or attached to the vertical frame by welding. Alternatively, the handle may be fixedly and detachably attached to the vertical frame by a bolt, but is not limited thereto. The handle is not arranged or coupled directly or indirectly on the shopping article receiving element, i.e. the handle is decoupled from the shopping article receiving element. The handle can be decoupled from the first load cell and from the second load cell.The shopping item receiving member may be any member capable of physically receiving, carrying, or temporarily storing at least one shopping item. The article receiving member may comprise at least two separately usable article receiving sub-members, preferably a first or upper article receiving sub-member or upper basket and a second or lower article receiving sub-member or lower basket. The at least two separately usable shopping article receiving sub-elements may be identical or different from each other. For example, the at least two separately usable shopping article receiving sub-elements may be, but are not limited to, a grid basket, a grid, a grill, a tray, a slat grid, or a tray.The shopping article receiving element can be provided or comprise or consist of a metal such as aluminum, iron or steel, but is not limited thereto. The diameter of the rods of the diameter of the rods of the two separately usable shopping article receiving sub-elements may be identical or different from each other. If the diameter of the rods of the two separately usable shopping article receiving sub-elements are different from each other, the diameter of the rods for the lower shopping article receiving sub-element may be larger than the diameter of the rods of the upper shopping article receiving sub-element.The at least two separately usable shopping article receiving sub-elements may be mechanically coupled to each other by one or more connecting elements such as a connecting tube or a connecting rod, but are not limited thereto.The connectors coupling the two shopping article receiving sub-members together could be overlapped or covered by the vertically extending portions on the left and right sides of the cart. Thus, the connection between the upper basket and the lower basket is protected from impacts against other carriages or shelves within the supermarket. The impact could affect the weighing or weighing measurement process and could affect the operation of the load cells. There could be two connecting rods on both sides. Preferably, they have a similar inclination angle as a part of the chassis, e.g. the vertically extending portion thereof.The at least two separately usable shopping article receiving sub-elements may be made of the same material, but are not limited thereto.The lower article-receiving sub-element can at least partially overlap or overlap the chassis, in particular the flat horizontally running section of the chassis, in particular the first section of the flat horizontally running section.The article receiving element, in particular the first or upper article receiving sub-element, can comprise a front side, a bottom surface, two opposite side surfaces and a rear side. The rear of the first and upper shopping article receiving sub-members, respectively, may be pivotally mounted to the two side walls to provide the ability of the shopping cart to be nestable with other shopping cart. Additionally, the rear of the first or upper shopping article receiving sub-member may include, but is not limited to, a fold-out child seat. Each of the first and upper articles receiving sub-members and the second and lower articles receiving sub-members may have a wedge shape to provide the ability of the shopping cart to be nestable with other shopping cart.The shopping article receiving member, i.e., the first and upper shopping article receiving sub-members and the second and lower shopping article receiving sub-members, respectively, may be mounted only on the first load cell and the second load cell. Thus, any interference by the user's hand or operation or movement of the cart can affect the measurement process, and precise measurement of the shopping article can be ensured.The articles-receiving element, i.e. the first or upper articles-receiving sub-element and the second or lower articles-receiving sub-element, can be fixedly but releasably connected or coupled, in particular only, to the first load cell and the second load cell, in particular to the first load cell holding element and the second load cell holding element.The first load cell, in particular the first load cell shopping article receiving element holding plate, can be fixedly but releasably connected or coupled or mounted on the rear side of the bottom surface of the shopping article receiving element, in particular of the upper shopping article receiving sub-element.The first load cell and the second load cell are arranged in the region of the center line from the rear to the front of the carriage. By using the first load cell shopping article receiving member holding plate and the second load cell shopping article receiving member holding plate, the load inside or on the shopping article receiving member is uniformly distributed and provided to the load side below the first or second holding plate.The second load cell, in particular the second load cell shopping article receiving element holding plate, can be fixedly but releasably connected or coupled or mounted on the front side of the shopping article receiving element, in particular of the lower shopping article receiving sub-element. For example, the shopping article receiving member may be coupled to the first load cell and the second load cell via a screw, but is not limited thereto.The first load cell may represent any load cell, weight cell or scale configured for electrically or mechanically measuring, in particular only for measuring, the weight of the articles receiving element and articles of shopping located in the articles receiving element, arranged or temporarily stored. The first load cell can be directly coupled to the chassis, in particular to the vertically extending section of the chassis. Alternatively, the first load cell can be coupled indirectly to the chassis, in particular to the vertically extending section of the chassis, via or by a first load cell holding element. The first load cell or the first load cell holding element may be arranged or coupled directly at the vertically highest point of the vertically extending portion of the chassis. The first load cell may have a measurement range of 50 g to 250 kg, but is not limited thereto. The first load cell may be identical to or different from the second load cell. The first load cell may be directly or indirectly communicatively coupled to an electronic computing unit disposed on the vertical frame. Additionally or alternatively, the first load cell may be directly or indirectly communicatively coupled to a display unit. The first load cell may comprise one or more weight measurement units, e.g. sensors, etc. In addition, the first load cell may comprise a first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be configured to hold, i.e. be mounted or coupled, or to hold directly or indirectly, in particular only, the shopping article receiving element, in particular to the first or upper shopping article receiving sub-element. As a result, the entire weight of the shopping article receiving element, in particular with the first or upper shopping article receiving sub-element, can be centralized at the first load cell. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be arranged on the one or more weight measurement units, wherein the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be directly coupled, in particular only fixedly coupled, to the one or more weight measurement units. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte may be made of metal, in particular steel, but is not limited thereto. The first load cell shopping article receiving member holding plate 9 a 2 may include, but is not limited to, a circular shape, a triangular shape, a square shape, a rectangular shape, or a polygonal shape. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte may include one or more through holes or tapped holes through which bolts extend for fixedly but releasably connecting the first load cell to the article receiving member. The through holes or tapped holes may extend entirely or partially through the entire first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte from the top surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte to the bottom surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. Additionally, the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte may include a plurality of first load cell shopping article receptacle coupling members also configured to couple or connect the shopping article receptacle member, particularly the first and upper shopping article receptacle sub-members, respectively, to the first load cell. The first load cell shopping article receiving member coupling members may be made of or include the same material of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte but are not limited thereto. The first load cell shopping article receiving member coupling members on the adjacent side walls of the panel may be different from each other. Opposing side walls may include, but are not limited to, the same first load cell shopping item receptacle couplings. For example, the first load cell shopping article receiving member coupling members may be hooks or protrusions, which are not limited thereto. The hooks may be part or not of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte i.e., the hooks are different parts that may be welded to the bottom surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. The protrusions may be a part of the first load cell shopping article receiving member holding plate, i.e., formed of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte by bending a part of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. The protrusions may be bent such that the protrusions extend in a plane below or equal to the bottom surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. The first load cell shopping article receiving member coupling members on each side wall may be identical in size and shape or different from each other.The first load cell can be arranged embedded within a first load cell holding frame. By disposing the first load cell in this first load cell holding frame, horizontal movement of the first load cell can be reliably prevented. The first load cell support frame may be directly connected to the first load cell support member directly disposed on the chassis.The second load cell can represent any load cell, weight cell or scale configured for electrically or mechanically measuring, in particular only for measuring, the weight of the articles receiving element and articles of shopping located in the articles receiving element, arranged or temporarily stored. The second load cell can be coupled directly to the chassis, in particular to the flat horizontally running section of the chassis. Alternatively, the second load cell can be coupled indirectly to the chassis, in particular to the flat horizontally running section of the chassis, via a second load cell holding element. The second load cell or the second load cell holding member may be directly disposed or coupled to a first portion of the flat horizontally extending portion that is opposed to a second portion of the flat horizontally extending portion to which the vertically extending portion and the flat horizontally extending portion are coupled or combined. The second load cell support member may be directly or indirectly coupled to the roller support member, but is not limited thereto. For example, the roller support member and the second load cell support member may be one-piece, but are not limited thereto. The second load cell may have a measurement range of 50 g to 250 kg, but is not limited thereto. The second load cell may be identical to or different from the first load cell. The second load cell may be directly or indirectly communicatively coupled to an electronic computing unit disposed on the vertical frame. Additionally or alternatively, the second load cell can be communicatively coupled directly or indirectly to a display unit. The second load cell may comprise at least one or more weight measurement units, e.g. sensors, etc. In addition, the second load cell may comprise a second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be arranged on the one or more weight measurement units, wherein the second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be directly coupled, in particular only fixedly coupled, to the one or more weight measurement units. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte may be made of metal, in particular steel, but is not limited thereto. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte may include, but is not limited to, a circular shape, a triangular shape, a square shape, a rectangular shape, or a polygonal shape. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte can be configured to hold, in particular only to hold or fix, the articles receiving element, in particular the lower articles receiving sub-element, on the second load cell. As a result, the entire weight of the shopping article receiving element, in particular with the second or lower shopping article receiving sub-element, can be centralized at the second load cell. On or at the upper surface of the second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte one or more second load cell coupling elements may be arranged. Each of the one or more second load cell coupling elements may comprise at least one through hole or threaded bore through which or in the bolt may be arranged for fixedly but releasably connecting the articles receiving element, in particular the lower articles receiving sub-element, to the second load cell. The second load cell coupling elements may include, but are not limited to, a circular shape, a triangular shape, a square shape, a rectangular shape, or a polygonal shape. The second load cell can be indirectly coupled to the chassis, in particular to the flat horizontally running section of the chassis, via or by a second load cell holding element.By having the shopping cart include a first load cell and a second load cell, a shopping cart is provided that supports and assists the customer during the shopping process.In an embodiment of the shopping cart, the vertically extending portion comprises an S-shape, a U-shape or a Z-shape, in particular an inclined S-shape, a U-shape, a C-shape or a Z-shape.By providing the vertically extending portion with an S-shape, a U-shape, a C-shape or a Z-shape, in particular an inclined S-shape, a U-shape, a C-shape or a Z-shape, the stability of the chassis can be significantly increased.In one embodiment of the shopping cart, the vertical frame is coupled to the vertically highest point of the vertically extending portion of the chassis.In an embodiment of the shopping cart, the at least one first load cell is coupled to the vertically highest point of the vertically extending portion of the chassis and / or wherein the at least one second load cell is coupled to a first portion of the flat horizontally extending portion that is opposite a second portion of the flat horizontally extending portion to which the vertically extending portion and the flat horizontally extending portion are coupled.By thus arranging the first load cell and a second load cell, the accuracy of measurement can be significantly increased.In particular, by limiting the influence of, e.g., stresses in or from the shopping article receiving element due to the load with shopping articles, the accuracy of the measurement of the first and second load cells can be increased.By locating the first load cell at the vertically highest point of the vertically extending portion of the chassis and by locating the second load cell at the first portion of the flat horizontally extending portion, the total weight of the article receiving member can be measured using both tensile forces and load forces when the upper article receiving sub-member and the lower article receiving sub-member are interconnected by one or more connecting tubes or one or more connecting rods.By having the substantially vertically extending or vertically inclined connecting pipes disposed between the upper basket and the lower basket, the weight of the upper shopping article receiving sub-element is measured by the first or rear load cell on which the upper shopping article receiving sub-element rests, the weight also being transferred to the second load cell at the front of the shopping cart via the connecting pipes.Any articles of shopping loaded onto the lower article receiving sub-element are measured by the second load cell on which the lower article receiving sub-element rests, whereas due to the connecting pipes between the upper and lower article receiving sub-elements, the weight of the articles of shopping on the lower article receiving sub-element is also measured by the first load cell.In one embodiment, the load of the articles of shopping in the first and / or second article receiving sub-element may be transmitted to the first and / or second load cell via connecting elements.In one embodiment, the load of the articles of shopping in the first and / or second article receiving sub-element may be transferred to the first and / or second load cell by tensile forces and by the load resting on the article of shopping receiving sub-element.In conventional cars with load cells, the load is measured only by loading the articles of purchase on the load cells, but not by using tensile or resistive forces which also transmit the load to an upper or higher load cell.In one embodiment of the shopping cart, the shopping article receiving element is mounted only on the first load cell and the second load cell.By thus disposing the shopping article accommodating member only on the first and second load cells, the accuracy of measuring the weight of all the shopping articles in the shopping article accommodating member can be significantly increased.In one embodiment of the shopping cart, the shopping article receiving element is connected fixedly but detachably to the first load cell and the second load cell.By connecting the shopping article receiving element in such a manner firmly but detachably to the first load cell and the second load cell, a damaged shopping article receiving element and / or a damaged first or second load cell can be replaced, so that the usability and service life of a shopping cart can be significantly increased.In another embodiment, if the upper shopping article receiving sub-member and the lower shopping article receiving sub-member are not connected to each other by one or more connecting pipes or a connecting rod, the weight of the upper shopping article receiving sub-member and the lower shopping article receiving sub-member may be separately measured by the first load cell and the second load cell, respectively.In one embodiment of the shopping cart, the chassis consists of a single continuous curved tube, in particular a metal tube.By thus providing the chassis from a single continuous curved tube, the manufacture of the shopping cart, particularly the chassis, can be simplified and the manufacturing cost can be lowered. Furthermore, the stability of the chassis can be increased.In one embodiment of the shopping cart, the vertical frame and / or the handling handle are decoupled from the first load cell and from the second load cell.By thus decoupling the handle and the vertical frame from the first and second load cells, the accuracy of measuring the weight of all articles of shopping in the article receiving member can be significantly increased.In one embodiment of the shopping cart, the first load cell and the second load cell are arranged such that the first load cell and the second load cell only measure the mass of the shopping article receiving device and measure the purchased shopping article.In one embodiment of the shopping cart, the outer boundary of the vertical frame forms the lateral outer side of a rear region of the shopping cart, within which a rear region of the shopping article receiving element lies.By thus disposing the rear portion of the shopping article accommodating member within the outer boundary of the vertical frame, the shopping article accommodating member with the enclosed shopping articles is secured from effects affecting the weight measurement of the shopping article accommodating member. Thus, the accuracy of measurement of the weight can be significantly increased.In one embodiment of the shopping cart, the shopping article receiving element has at least two separately usable shopping article receiving sub-elements, in particular an upper shopping article receiving sub-element and a lower shopping article receiving sub-element.The at least two separately usable items receiving sub-elements in or on the shopping trolley can increase the storage space for items of shopping.In one embodiment of the shopping cart, the upper shopping article receiving sub-element is a grid basket.In one embodiment of the shopping cart, the lower sub-element for receiving articles of shopping at least partially overlaps the chassis, in particular the flat horizontally running section of the chassis.In one embodiment, the first load cell and the second load cell may be at different heights. By having the two load cells at different levels, more accurate measurement of the articles of purchase can be achieved. Furthermore, by mounting the first load cell on the upper portion of the vertically extending portion and by mounting the vertical frame also on the upper portion of the vertically extending portion, any influence on the vertical frame by the sliding of the carriage or by the user weight on the measurement process is avoided.In one embodiment, the first load cell may be located at the rear portion of the cart and the second load cell may be located at the front portion of the cart.In one embodiment, the first load cell may be located at the rear portion at a higher level than the second load cell.In an embodiment of the shopping cart, the shopping cart further comprises an electronic computing unit disposed on the vertical frame and communicatively coupled to the first load cell and the second load cell. The computing unit may represent any unit configured to receive and process the measurement data provided by the first load cell and / or the second load cell. The computing unit may include, but is not limited to, a receiving unit, a processing unit, and a communication unit. The processing unit may be arranged or placed, for example, to summarize the weight of all articles of shopping located in the article receiving element. Further, the processing unit may be configured to further process the received measurement data, e.g. to calculate the actual price of the articles of shopping located in the article receiving element. The computing unit may be directly or indirectly communicatively coupled to the first load cell and the second load cell in a wired or wireless manner, but is not limited thereto. In addition, the computing unit can be directly or indirectly communicatively coupled by wire or wirelessly to a display unit which is included in the computing unit or is arranged on the vertical frame of the shopping cart. The computing unit may further include a scanner configured to scan commercial articles or bar codes of the commercial articles, but is not limited thereto. Furthermore, the computing unit can further comprise a child seat activation element. The child seat activating element can be any element, e.g. button or sensor, whereby the computing unit receives information or data when the child seat located at the rear side of the shopping article receiving element is activated, i.e. fold-out, or deactivated. If the child seat activating element indicates activation of the child seat, an error value of the measurement is increased, e.g., increased by about 15 kg, but is not limited thereto. The communication unit of the computing unit can be configured to communicate directly or indirectly, by wire or wirelessly, with a communication unit of the stationary payment station. The computing unit may be arranged or fastened or fixed or fixedly and detachably mounted on the vertical frame, but is not limited thereto. Furthermore, the computing unit may comprise a validation unit configured to compare the measurement data provided by the first load cell and / or the second load cell to identify differences / anomalies in the measurement data. This makes it possible to identify defective or defective elements.By including a computing unit in the shopping cart, further information may be processed, determined, and / or provided to support the customer or user of the shopping cart during the shopping process.In an embodiment of the shopping cart, the shopping cart further comprises a display unit comprised in the electronic computing unit or arranged on the vertical frame and communicatively coupled to the first load cell and the second load cell and the electronic computing unit.The display unit may represent any unit configured to display information to the user of the shopping cart. For example, the display unit may be, but is not limited to, a touch screen. The display unit may be included in the computing unit or may be disposed on the vertical frame. The display unit may be disposed on the vertical frame, fixed, or fixedly and detachably mounted, but is not limited thereto. The display unit may be directly or indirectly communicatively coupled to the computing unit and / or the first and second load cells in a wired or wireless manner, but is not limited thereto.By providing a display unit on the shopping cart, further information may be displayed to the customer or user of the shopping cart so that the customer may be supported during the shopping process.In another aspect, a shopping payment system unit with a stationary payment station is presented. The stationary payment station comprises a shopping cart as described above, wherein the shopping cart comprises an electronic computing unit, wherein the stationary payment station and the electronic computing unit are configured to communicate with each other during a payment process, wherein the actual total mass is determined by weighing the articles of shopping in or on the article receiving element of the shopping cart taken into account during the payment process, and wherein the actual total mass is compared with a target total mass.The shopping payment system may be any system, e.g., a self-service system, configured to allow a user or customer to pay the items in the shopping item receiving element of the shopping cart itself without requiring a cashier. The shopping payment system includes a stationary payment station. The stationary payment station may comprise a communication unit configured to communicate wirelessly or in a wired manner with the communication unit of the electronic computing unit of the shopping cart during a payment process. The stationary payment station may further comprise a computing unit configured to determine the actual total mass by weighing the articles of shopping in or on the article receiving element of the shopping cart taken into account during the payment process. In addition, the calculation unit may be configured to compare the actual total mass with a target total mass. In addition, the computing unit may be configured to compute the total price of the articles of shopping in or on the article receiving element of the shopping cart taken into account during the payment process. The stationary payment station may further comprise a display, in particular a touchscreen, configured to display the total price to the costumer or user. Furthermore, the stationary payment station can comprise a payment terminal for paying the bill by card or cash.By thus providing a shopping payment system, the number of energy-consuming, time-consuming and / or cumbersome movements of the articles of shopping during the shopping process (i.e., movement from storage to the shopping cart, from the shopping cart on the shopping band of the cash register, from the cash register - after scanning - back to the shopping cart, from the shopping cart into a pocket) can be significantly reduced, so that the shopping process can be made less energy-consuming, less time-consuming and more pleasing.A load cell or load cell may convert a force such as tension, compression, pressure or torque into a signal (electrical, pneumatic or hydraulic pressure or mechanical displacement indicator) that may be measured and standardized. This is a force transducer. As the force applied to the load cell increases, the signal varies proportionally. The most common types of load cells are pneumatic, hydraulic and strain gauge types for industrial applications. In the present case, the load cell may be a component capable of converting the mechanical load into an electrical signal representative of the force or weight applied to it. The functional principle is for strain gauges that are stretched or compressed when a load is applied. The ability to weigh with a load cell depends primarily on its ability to deflect / flex repeatedly as the load is applied or removed.The invention or further embodiments and advantages of the invention are explained in more detail below with reference to drawings, wherein the drawings describe only embodiments of the invention. Like components in the drawings are denoted by like reference numerals. Elements drawn with dotted lines are considered optional elements.The drawings are not to be considered true to scale, and individual elements of the drawings may be shown in exaggerated or exaggeratedly simplified form.BRIEF DESCRIPTION OF THE DRAWINGSThe invention will be further described below with reference to the attached figures: Figure 1 illustrates a side view of a shopping cart according to the present invention. FIG. 2 illustrates a three-dimensional view of an embodiment of the shopping cart of FIG. 1. FIG. 3 illustrates a three-dimensional view of an exemplary embodiment of the shopping cart of FIGS. 1 and 2 with a released shopping article receiving member. FIG. 4 illustrates a side view of an exemplary embodiment of the shopping cart of FIGS. 1, 2, and 3 with a released shopping item receiving member. FIG. 5 illustrates a three-dimensional view of an example embodiment of the chassis and vertical frame of the shopping cart of FIGS. 1, 2, 3, and 4. FIG. 6 illustrates a three-dimensional view of an exemplary embodiment of the first load cell of the shopping cart of FIGS. 1, 2, 3, 4 and 5. FIG. 7 illustrates a three-dimensional view of an exemplary embodiment of the second load cell of the shopping cart of FIGS. 1, 2, 3, 4, 5 and 6. Figure 8 illustrates a shopping payment system unit with a stationary payment station.DETAILED DESCRIPTION OF THE EMBODIMENTFig. 1 shows a side view of a shopping cart according to the present invention. The shopping cart 1 comprises a chassis 2, the chassis 2 having a plurality of rollers 3 and comprising a vertically extending portion 2a and a flat horizontally extending portion 2b. The shopping cart 1 further comprises a vertical frame 4 and a handle 5, wherein the handle 5 is arranged on the vertical frame 4. The shopping cart 1 further comprises a shopping article receiving element 10, at least one first load cell 9a mounted on the vertically extending portion 2a of the chassis 2, at least one second load cell 9b mounted on the flat horizontally extending portion 2b of the chassis 2, wherein the shopping article receiving element 10 is mounted on the first load cell 9a and on the second load cell 9b.Optionally, the vertically extending portion 2 aincludes an S-shape, a U-shape or a Z-shape, in particular an inclined S-shape, a U-shape, a C-shape or a Z-shape.Optionally, the vertical frame 4 is coupled to the vertically highest point of the vertically extending portion 2 aof the chassis 2.Optionally, the at least one first load cell 9 ais coupled to the vertically highest point of the vertically extending section 2 aof the chassis 2 and / or wherein the at least one second load cell 9 bis coupled to a first section 2 b 1 of the flat horizontally extending section 2 bwhich is opposite to a second section 2 b 2 of the flat horizontally extending section 2 bto which the vertically extending section 2 aand the flat horizontally extending section 2 bare coupled.Optionally, the shopping article receiving member 10 is mounted only on the first load cell 9a and the second load cell 9b.Optionally, the shopping article receiving element 10 is fixedly but detachably connected to the first load cell 9 aand the second load cell 9 b.Optionally, the chassis 2 consists of a single continuous curved tube, in particular a metal tube.Optionally, the vertical frame 4 and the handling handle 5 are decoupled from the first load cell 9 aand from the second load cell 9 b.Optionally, the first load cell 9 aand the second load cell 9 bare arranged such that the first load cell 9 aand the second load cell 9 bmeasures only the mass of the shopping article receiving device 10 and the purchased shopping article.Optionally, the outer boundary of the vertical frame 4 forms the lateral outer side of a rear region of the shopping cart 1, within which a rear region of the shopping article receiving element 10 lies.Optionally, the shopping article receiving member 10 comprises at least two separately usable shopping article receiving sub-members, in particular an upper shopping article receiving sub-member 11 and a lower shopping article receiving sub-member 12.Optionally, the upper shopping article receiving sub-element 11 is a grid basket.Optionally, the lower article-receiving sub-element 12 at least partially overlaps the chassis 2, in particular the flat horizontally running section 2 bof the chassis 2.Optionally, the shopping cart 1 further comprises an electronic computing unit 6, which is arranged on the vertical frame 4 and is communicatively coupled to the first load cell 9 aand the second load cell 9 b.Optionally, the shopping cart 1 further comprises a display unit 7 comprised in the electronic computing unit 6 or arranged on the vertical frame 4 and communicatively coupled to the first load cell 9 aand the second load cell 9 band the electronic computing unit 6.FIG. 2 shows a three-dimensional view of an exemplary embodiment of the shopping cart from FIG. 1, respectively. the shopping cart 1 comprises a chassis 2 with a plurality of rollers 3 which are directly and / or indirectly coupled to the chassis 2. The chassis 2 comprises a vertically extending portion 2a and a flat horizontally extending portion 2b. The shopping cart 1 further comprises a vertical frame 4 and a handle 5, wherein the handle 5 is arranged on the vertical frame 4. The handle 4 is a handle or a plurality of handles made of a foam or a plastic. The handle 4 is fixed or fixed to the vertical frame 4. The shopping cart 1 further comprises a shopping article receiving member 10, wherein the shopping article receiving member 10 comprises an upper shopping article receiving member sub-member 11 and a lower shopping article receiving member sub-member 12. The shopping cart 1 further comprises a first load cell 9a mounted on the vertically extending portion 2a of the chassis 2 and a second load cell 9b mounted on the flat horizontally extending portion 2b of the chassis 2. The shopping article accommodating member 10, i.e., both the upper shopping article accommodating member sub-member 11 and the lower shopping article accommodating member sub-member 12, is mounted on the first load cell 9 aand the second load cell 9 b. The shopping cart 1 further comprises an electronic computing unit 6. the electronic computing unit 6 is arranged on or on the vertical frame 4 and is communicatively coupled to the first load cell 9 aand the second load cell 9 b. The electronic processing unit 6 further comprises a display unit 7. the handle 4 is arranged next to the electronic processing unit 6, in particular the electronic processing unit is arranged sandwiched between the handles 4. The vertical frame 4 is configured in each case such that an outer boundary of the vertical frame 4 forms a lateral outer side of the rear region of the shopping cart 1, within which a rear region of the shopping article receiving element 10, in particular of the upper shopping article receiving element sub-element 11, lies. The vertically extending section 2 aof the chassis 2 is configured in each case such that the outer boundary of the vertically extending section 2 aconstitutes the lateral outer side of the rear region of the shopping cart 1, within which the rear region of the shopping article receiving element 10, in particular of the lower shopping article receiving element sub-element 12, lies. The lower article-receiving element sub-element 11 at least partially overlaps or overlaps the chassis 2, in particular the flat horizontally running section 2 bof the chassis 2, in particular the first section 2 b 1 of the flat horizontally running section 2 b. The first and upper shopping article receiving member sub-members 11 and the second and lower shopping article receiving member sub-members 12 have a wedge shape to provide the ability of the shopping cart 1 to be nestable with other shopping cart.FIG. 3 shows a three-dimensional view of an exemplary embodiment of the shopping cart from FIG. 1 or FIG. 2 with a released shopping article receiving element. The shopping article receiving member 10 comprises two separately usable shopping article receiving member sub-members, preferably a first and an upper shopping article receiving member sub-member 11 and a second and a lower shopping article receiving member sub-member 12, respectively. The upper shopping article receiving sub-member 11 is a grid basket. The lower article receiving sub-member 12 is a grille or grill. The shopping article receiving sub-member 10 contains or consists of a metal such as aluminum, iron or steel. The at least two separately usable shopping article accommodating sub-members are mechanically coupled to each other by a connecting member 13 such as a connecting pipe or a connecting rod. By using the one or more connecting elements 13, the upper and lower articles receiving sub-elements 11 and 12 are coupled to each other, so that the weight of the goods within or on the one or both articles receiving sub-elements 11 and 12 is evenly distributed to both load cells without being coupled to the chassis 2. The diameter of the rods of the two separately usable shopping article receiving sub-members 11 and 12 may be different from each other. In particular, the diameter of the rods for the lower shopping article receiving sub-element 12 is larger than the diameter of the rods of the upper shopping article receiving sub-element 11. The shopping article receiving element 10, in particular the first or upper shopping article receiving sub-element 11, comprises a front side 11 a, a bottom surface 11 b, two opposite side surfaces 11 cand a rear side 11 d. The rear side 11d of the first and upper articles accommodating sub-member 11 is pivotally mounted on the two side walls to make the shopping cart 1 nestable with other shopping cart. The rear side 11d of the first or upper shopping article receiving sub-element comprises a fold-out child seat.FIG. 4 shows a side view of an exemplary embodiment of the shopping cart from FIGS. 1, 2 and 3 with a released shopping article receiving element. The chassis 2 comprises a vertically extending portion 2a and a flat horizontally extending portion 2b. The vertically extending portion extends in a vertical direction Z with respect to a roller contact surface or plane L 1. The vertical direction Z is perpendicular to the roller contact surface or plane L1. The roller contact surface or plane L1 is the contact surface of the rollers 3 and the floor. The vertically extending portion 2a of the chassis 2 extends obliquely to the roller contact surface or plane L1. Therefore, the vertically extending portion 2 aextends in both the vertical direction Z and the horizontal direction X. The inclination angle γ 1 is 45°. The vertically extending portion 2a is inclined toward the flat horizontally extending portion 2b. The vertically extending portion 2a at least partially overlaps the flat horizontally extending portion 2b. The vertically extending portion 2a has a height H2, i.e., the plane of the highest point L3, of 200% of the vertical distance H1 between the roller contact surface or plane L1 and the plane of the flat horizontally extending portion L2. The vertically extending portion 2 aincludes an inclined S-shape. The flat horizontally extending portion 2b extends in the horizontal direction X with respect to a roller contact surface or plane L1. The horizontal direction X and the roller contact surface or plane L 1 are parallel to each other, in particular the same. The flat horizontally extending portion 2b is almost completely parallel to the horizontal direction X or the roller contact surface or plane L1. In this connection, almost completely parallel represents that a, in particular a, portion of the flat horizontally running portion 2 bis inclined away from the roller contact surface or plane L 1. The section has a length of 10% of the length of the flat horizontally extending section 2a. The section has an angle of inclination γ 2 of 10°. The inclined portion has a height H3 of 20% of the vertical distance H1 between the roller contact surface or plane L1 and the plane of the flat horizontally extending portion L2. The inclined portion, in particular the first portion 2 b 1, faces the other portion, in particular the second portion 2 b 2, of the flat horizontally extending portion 2 bto which the vertically extending portion 2 aand the flat horizontally extending portion 2 bare coupled. The aspect ratio between the vertically extending portion 2a and the flat horizontally extending portion 2b in the horizontal direction X is 1 / 3. The vertical frame 4 extends inclinedly to the roller contact surface or plane L1. In other words, the vertical frame 4 extends in both the vertical direction Z and the horizontal direction X. The inclination angle γ 3 is 60°. The vertical frame 4 is inclined away from the flat horizontally extending portion 2b of the chassis 2.FIG. 5 shows a three-dimensional view of an exemplary embodiment of the chassis and the vertical frame of the shopping cart from FIGS. 1, 2, 3 and 4, respectively. The chassis 2 comprises a plurality of rollers 3, in particular four rollers, two on the front side, two on the rear side. Two of the plurality of rollers 3, particularly the rear rollers 3, are directly disposed on the chassis 2. The two rollers 3 of the plurality of rollers, in particular the front roller 3, are indirectly arranged on the chassis above or through a roller support member 3a. The roller support members 3a are directly arranged or mounted or coupled to the chassis 2. At least two of the rollers 3 are rotatable about the Z direction to provide a flexible steerability of the carriage.In addition, on or on the chassis 2, the vertical frame holding member 4a and a first load cell holding member 9a1 are directly mounted. The vertical frame holding member 4a is disposed within the vertically extending portion 2a, i.e., within the S-shape, of the chassis 2 at the vertically highest point of the vertically extending portion 2a of the chassis 2. The first load cell holding member 9 a 1 is disposed at the vertically highest point of the vertically extending portion 2 aof the chassis 2 outside, i.e., outside the S-shape, of the vertically extending portion 2 a. The vertical frame holding member 4a and the first load cell holding member 9a1 are disposed at the same height. The vertical frame holding member 4a comprises one or more connecting members, i.e. through holes or threaded holes, for fixedly and detachably connecting the vertical frame 4 to the vertical frame holding member 4a. The first load cell holding member 9a1 comprises one or more connecting members, i.e. through holes or threaded holes, for fixedly but detachably connecting or coupling the first load cell holding frame 9a5 to the first load cell holding member 9a1. Inside the first load cell holding frame 9a5, the first load cell 9a is disposed. The chassis 2 is provided or comprises a single continuous curved tube or consists thereof. The tube may have a cylindrical shape. The diameter of the tube is 3 cm. The tube is a hollow tube. The tube has a constant diameter. The chassis 2 is provided or comprises a metal such as aluminum, iron or steel or a combination thereof or an alloy produced therefrom or consists thereof. The chassis 2 may comprise a vertically extending portion 2a and a flat horizontally extending portion 2b. In particular, the chassis 2 comprises two vertically running sections 2 aand a flat horizontally running section 2 b. At each end of the flat horizontally extending portion 2b, one of the vertically extending portions 2a is disposed. The flat horizontally extending portion 2b includes a U-shape or a V-shape with respect to the roller contact surface or plane L1. The flat horizontally running section 2 bis provided in such a way that, in a side view, both the horizontally running section 2 b, in particular the arms of the horizontally running section 2 b, and the vertically running section 2 aare identical or overlap one another. The chassis 2 further comprises a plurality of connections 8, in particular connecting pipes. The links 8 extend horizontally and connect the end portions of the vertically extending portion 2a and / or connect the S-shape loops of the vertically extending portion 2a. The vertical frame 4 is coupled to the vertically highest point of the vertically extending portion 2a of the chassis 2. The vertical frame 4 is indirectly coupled through or via a vertical frame holding member 4a to the vertically highest point of the vertically extending portion 2a of the chassis 2. The connection of the vertical frame 4 to the vertical frame holding member 4a is fixed, i.e., non-rotatable. The vertical frame 4 is provided or comprises a single continuous curved tube. The vertical frame 4 is connected at both ends to a respective vertical frame holding member 4a. The tube of the vertical frame 4 has a cylindrical shape. The tube of the frame 4 is a hollow tube. The pipe of the vertical frame 4 has a diameter of 3 cm, so that the pipe of the vertical frame 4 and the pipe of the chassis 2 are identical. The tube of the vertical frame 4 has a constant diameter. The vertical frame 4 is provided or comprises a metal such as aluminum, iron or steel or consists thereof.FIG. 6 shows in each case an exemplary embodiment of a three-dimensional view of the first load cell of the shopping cart from FIGS. 1, 2, 3, 4 and 5. In addition, the first load cell 9 aincludes a first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a2. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2 is arranged on the one or more weight measurement units, wherein the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2 is directly coupled, in particular only fixedly coupled, to the one or more weight measurement units. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 is made of metal, in particular steel. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 comprises a polygonal shape, in particular a nearly rectangular shape. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 is configured to hold or fix the shopping article receiving element 10, in particular the upper shopping article receiving sub-element 11, to the first load cell 9a. In other words, the articles-receiving element 10, in particular the upper articles-receiving sub-element 11, is mounted via the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2 or is directly or indirectly coupled or connected to the first load cell 9 a. The first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 comprises one or more through holes 9a4 or threaded holes, through or in the bolt for firmly but releasably connecting the shopping article receiving element 10, in particular the upper shopping article receiving sub-element 11, to the first load cell 9a. The through holes 9 a 4 extend through the entire first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2 from the upper surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2 to the lower surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 a 2. In addition, the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 comprises one or more first load cell shopping article receiving member coupling members 9a3 at its side walls. The first load cell shopping article receiving member coupling members 9a3 are made of the same material as the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2. The first load cell commodity accommodating member coupling members 9 a 3 on the adjacent side walls are different from each other, and opposite side walls include the same first load cell commodity accommodating member coupling members 9 a 3. On two opposite side walls of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2, the first load cell shopping article receiving member coupling members 9a3 are hooks. The hooks are not part of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2, i.e., the hooks are different parts welded to the lower surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2. On two other opposite side walls of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2, the first load cell shopping article receiving member coupling members 9a3 are protrusions. The protrusions are a part of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2, i.e., formed of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2 by bending a part of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2. The protrusions are bent such that the protrusions extend in a plane below or equal to the bottom surface of the first Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9a2. The first load cell shopping article receiving member coupling members 9a3 on each side wall are identical in size and shape. The first load cell shopping article receiving member coupling members 9 a 3 are also configured to couple or connect the shopping article receiving member 10, in particular the upper shopping article receiving sub-member 11, to the first load cell 9 a.FIG. 7 shows a three-dimensional view of the exemplary embodiment of the second load cell of the shopping cart from FIGS. 1, 2, 3, 4, 5 and 6, respectively. In addition, the second load cell 9 bincludes a second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 b 2. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 b 2 is arranged on the one or more weight measurement units, wherein the second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9 b 2 is directly coupled, in particular only fixedly coupled, to the one or more weight measurement units. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b2 is made of metal, in particular steel. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b2 comprises a rectangular shape. The second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b2 is configured to hold or fix the articles receiving element 10, in particular the lower articles receiving sub-element 12, to the second load cell 9b. In other words, the articles-receiving element 10, in particular the lower articles-receiving sub-element 12, is mounted via the second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b2or is directly or indirectly coupled or connected to the second load cell 9b. On or on the upper surface of the second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b2, one or more, in particular four, second load cell coupling elements 9b4 are arranged. Each of the one or more second load cell coupling elements 9 b 4 comprises at least one through hole or threaded bore through which or in the bolt can be arranged for firmly but releasably connecting the articles receiving element 10, in particular the lower articles receiving sub-element 12, to the second load cell 9 b. The second load cell coupling members 9 b 4 have a circular shape. The second load cell 9 bis indirectly coupled to the chassis 2, in particular to the flat horizontally running section 2 bof the chassis 2, via or by a second load cell holding element 9 b 1. The second load cell holding member 9 b 1 is directly disposed or coupled to the first portion 2 b 1 of the flat horizontally extending portion 2 bwhich is opposed to a second portion 2 b 2 of the flat horizontally extending portion 2 bto which the vertically extending portion 2 aand the flat horizontally extending portion 2 bare coupled or combined. The second load cell holding element 9 b 1 is directly coupled to two, in particular sandwiched between two, roller holding elements 3 a. In other words, the second load cell holding element 9 b 1 and the roller holding elements 3 aare formed in one piece or in one piece.FIG. 8 shows a shopping payment system unit with a stationary payment station. The shopping payment system 20 comprises a stationary payment station 21 and a shopping cart 1, as described above. The shopping cart 1 comprises an electronic computing unit 6. the stationary payment station 21 comprises a communication unit 22 configured to communicate wirelessly or in a wired manner with the communication unit of the electronic computing unit 6 of the shopping cart 1 during a payment process. The stationary payment station 21 further comprises a computing unit 23 for computing e.g. the bill of all articles of shopping located in the article receiving element 10 of the shopping cart 1. The stationary payment station 21 can further comprise a display 24, in particular a touchscreen. Additionally, the stationary payment station 21 includes a payment terminal 25 to allow the user or costumer to pay the bill. The communication unit 22, the computing unit 23, the display 24, and the payment terminal 25 are communicatively coupled to each other in a wired or wireless manner.List of reference characters1 Shopping cart 2 Chassis 2a Vertically extending portion 2b Flat horizontally extending portion 2b1 First portion 2b2 Second portion 3 Roller 3a Roller holding member 4 Vertical frame 4a Vertical frame holding member 5 Handle 6 Arithmetic unit 7 Display unit 8 Connections 9a First load cell 9a1 First load cell holding member 9a2 First Wägezelleneinkaufsrtikelaufnahmeelementhalteplatte 9a3 First load cell shopping article holding member coupling member 9a4 Through holes 9a5 First load cell holding frame 9b Second load cell 9b1 Second load cell holding member 9b2 Second Wägezelleneinkaufsartikelaufnahmeelementhalteplatte 9b4 Second load cell coupling member 10 Shopping article holding member 11 Upper shopping article holding sub-member 11a Front side 11b Lower surface 11c Lateral surface 11d Rear 12 lower shopping article accommodating sub-member 13 connector 20 shopping payment system 21 stationary payment station 22 communication unit 23 arithmetic unit 24 display 25 payment terminal L 1 reel contact surface or plane L 2 plane L 3 plane X horizontal direction Z vertical direction H 1 height H 2 height H 3 height γ 1 inclination angle γ 2 inclination angle γ 3 inclination angle

Claims

A shopping cart (1) comprising: a chassis (2) coupled to a plurality of rollers (3), the chassis (2) comprising a vertically extending portion (2a) and a flat horizontally extending portion (2b); a vertical frame (4); a shopping article receiving member (10) for receiving at least one shopping article; at least one first load cell (9a) mounted on the vertically extending portion (2a) of the chassis (2); at least one second load cell (9b) mounted on the flat horizontally extending portion (2b) of the chassis (2), the shopping article receiving member (10) being mounted on the first load cell (9a) and on the second load cell (9b).A shopping cart (1) comprising: a chassis (2) having a plurality of rollers (3); a vertical frame (4) coupled to the chassis (2); a shopping article receiving member (10) for receiving at least one shopping article; at least one first load cell (9a) mounted on the chassis (2); at least one second load cell (9b) mounted on the chassis (2), wherein the shopping article receiving member (10) is mounted on the first load cell (9a) and on the second load cell (9b), wherein the first load cell (9a) is mounted at a higher level than the second load cell (9b) with respect to a floor level or the floor on which the cart (1) is to be moved.The shopping cart (1) according to claim 2, wherein the chassis (2) comprises a vertically extending portion (2a) and a flat horizontally extending portion (2b).The shopping cart (1) according to claim 1 or 3, wherein the vertically extending portion (2a) comprises an S-shape, a U-shape or a Z-shape, in particular an inclined S-shape, a U-shape, a C-shape or a Z-shape, preferably the vertically extending portion (2a) is provided at the rear portion of the chassis (2).The shopping cart (1) according to any one of the preceding claims 1, 3 or 4, wherein the vertical frame (4) is coupled to the vertically highest portion of the vertically extending portion (2a) of the chassis (2) and / or a handle (5) is coupled to the vertical frame for handling the shopping cart (1).The shopping cart (1) according to any one of the preceding claims, wherein the at least one first load cell (9a) is coupled to the vertically highest portion of the vertically extending portion (2a) of the chassis (2) and / or wherein the at least one second load cell (9b) is coupled to a first portion (2b1) of the flat horizontally extending portion (2b) which is opposite a second portion (2b2) of the flat horizontally extending portion (2b) to which the vertically extending portion (2a) and the flat horizontally extending portion (2b) are coupled.The shopping cart (1) according to any one of the preceding claims, wherein the shopping article receiving member (10) is mounted only on the first load cell (9a) and the second load cell (9b).The shopping cart (1) according to any one of the preceding claims, wherein the first load cell (9a) and the second load cell (9b) are at different heights.Shopping trolley (1) according to one of the preceding claims, wherein the shopping article receiving element (10) is fixedly but detachably connected to the first load cell (9a) and the second load cell (9b).Shopping trolley (1) according to one of the preceding claims, wherein the chassis (2) consists of a single continuous curved tube, in particular a metal tube.The shopping cart (1) according to any one of the preceding claims, wherein the vertical frame (4) and the handling handle (5) are decoupled from the first load cell (9a) and from the second load cell (9b).The shopping cart (1) according to any one of the preceding claims, wherein the first load cell (9a) and the second load cell (9b) are arranged such that the first load cell (9a) and the second load cell (9b) only measure the mass of the shopping article receiving device (10) and the purchased shopping article therein.The shopping cart (1) according to any one of the preceding claims, wherein the outer boundary of the vertical frame (4) forms the lateral outside of a rear area of the shopping cart (1), within which a rear area of the shopping item receiving element (10) lies.The shopping trolley (1) according to any one of the preceding claims, wherein the shopping article receiving element (10) comprises at least two separately usable shopping article receiving sub-elements, in particular an upper shopping article receiving sub-element (11) and a lower shopping article receiving sub-element (12).The shopping trolley (1) according to claim 14, wherein the upper shopping article receiving sub-element (11) and the lower shopping article receiving sub-element (12) are vertically spaced apart from each other and / or the upper shopping article receiving sub-element (11) is a grid cage and / or the lower shopping article receiving sub-element (12) at least partially overlaps the chassis (2), in particular the flat horizontally extending portion (2b) of the chassis (2); and / or the upper shopping article receiving sub-element (11) and the lower shopping article receiving sub-element (12) are coupled to each other by connecting elements (13).Shopping trolley (1) according to one of the preceding claims, further comprising an electronic computing unit (6) which is arranged on the vertical frame (4) or on the handle (5) coupled thereto and is communicatively coupled to the first load cell (9a) and the second load cell (9b), and / or further comprising a display unit (7) on the electronic computing unit (6).A shopping payment system unit (20) comprising a stationary payment station (21) and at least one shopping cart (1) according to any of the preceding claims, wherein the shopping cart (1) comprises an electronic computing unit (6), wherein the stationary payment station (21) and the electronic computing unit (6) are configured to communicate with each other during a payment process, wherein an actual total mass of articles of shopping in or on the shopping cart is determined by weighing the articles of shopping in or on the articles of shopping receiving element (10) of the shopping cart (1) taken into account during the payment process, and wherein the actual total mass is compared with a target total mass.

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