Weighing system and coupling belt

Abstract

Weighing system (10) comprising a base (14), a load sensor (18) coupled vertically to the base (14) by means of a parallel link arrangement and a lever (24) pivotally articulated to the base (14) by means of a lever joint (22) with a first lever arm (241) arranged on one side of the lever joint (22) and a second lever arm (242) arranged on the other side of the lever joint (22) and provided for receiving a sensor arrangement, wherein the first lever arm (241) is coupled to the load-bearing device (18) in a vertically force-transmitting manner by means of a coupling band (30) fixed to both it and the load-bearing device (18), wherein the coupling band (30) has two functional areas which are distinguished from immediately adjacent areas by reduced width and reduced thickness, namely - a thin-point joint (32) which has a thickness that initially decreases in the longitudinal direction of the coupling band (30) and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis (321) which extends parallel to the width direction and perpendicular to the length direction of the coupling band (30), - a resilience region (34, 34') which, in the longitudinal direction of the coupling band (30), has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes (341) parallel to the first pivot axis (321), and wherein, further in the longitudinal direction between the thin-point joint (32) and the resilience region (34, 34'), a lateral pivot area (39) is arranged, which consists of one or more parallel webs (392) extending in the longitudinal direction of the coupling band (30), each having a web width that is less than the thickness of the coupling band (30) in this area.

Description

Field of invention

[0001] The invention relates to a weighing system comprising a base, a load cell coupled vertically to the base by means of a parallel link arrangement, and a lever pivotally articulated to the base by means of a lever joint, with a first lever arm arranged on one side of the lever joint and a second lever arm arranged on the other side of the lever joint and configured to receive a sensor arrangement. wherein the first lever arm is coupled to the load-bearing device in a vertically force-transmitting manner by means of a coupling band fixed to both it and the load-bearing device, wherein the coupling band has two functional areas which are distinguished from immediately adjacent areas by reduced width and reduced thickness.

[0002] The invention further relates to a corresponding coupling band. State of the art

[0003] Weighing systems and coupling belts of this type are known from US 4,703,816 A.

[0004] A central component of an electronic scale, particularly one operating on the principle of electromagnetic compensation, is its weighing system. Here, the weighing system refers to the mechanical lever mechanism by which a weighing platform, which holds the item to be weighed, is connected to the scale's electronic sensor, typically a moving-coil array with optical lever position detection. The weighing system includes a base that allows it to be fixed to a platform or housing of the scale. A load cell is articulated to this base via a parallel linkage, often referred to as a Roberval mechanism. In the final assembly state of the scale, the aforementioned weighing platform is fixed either directly or indirectly to the load cell.The parallel link arrangement serves to prevent tilting of the load-bearing device or the load carrier, at least in the case of small deflections of the load-bearing device, which essentially occur along a circular arc with a radius equal to the length of the parallel link. Furthermore, a typical weighing system includes a lever for transmitting displacement and force, which is articulated to the base via a lever joint. A first lever arm of said lever is coupled to the load-bearing device to transmit its movement, caused by the weight of the load, to the lever. A second lever arm of the lever is typically equipped with a receptacle for lever-side components of an electronic sensor, in particular a moving coil, which interacts in a generally known manner, and not relevant here, with other base-side sensor components, in particular a magnetic pot, mounted at the base.Such a weighing system thus represents the "heart" of a scale, whereby similar weighing systems can be used in scales that are otherwise equipped differently.

[0005] The aforementioned coupling between the first lever arm and the load cell requires a connection, often referred to simply as a coupling, that is suitable for transmitting vertical forces between the load cell and the first lever arm while simultaneously being sufficiently flexible to decouple any non-vertical force components. As mentioned, a parallel link mechanism can prevent the load cell from tilting, but it cannot prevent its circular arc movement in addition to the inherent horizontal movement components. These horizontal components must not be transmitted to the lever, as they would distort the measured weight, which is unacceptable, especially with extremely high-resolution precision scales.To combine both requirements, namely vertical coupling and non-vertical decoupling, the couplings in question, as described in DE 30 12 344 A1, can be designed as thin sheet metal strips known as coupling bands. With a sufficiently thin coupling band, adequate non-vertical decoupling can be achieved even for extremely high-resolution scales. However, it has been found that such weighing systems are extremely susceptible to lateral acceleration forces, such as those typically encountered during transport, particularly during shipping. Therefore, considerable effort must be invested in packaging the scales to ensure they arrive at the recipient's location with undamaged coupling bands. The theoretical approach of fixing the coupling band to the load cell and first lever arm only after the scale has been set up at the destination is practically impossible, even for reasons related to calibration law.

[0006] From DE 32 42 954 A1, a coupling designed as a connecting rod is known which, near its respective fixing points on the load cell and first lever arm, has a functional area that is tapered in thickness and width. Together, these functional areas are intended to generate the elasticity of the coupling required for non-vertical decoupling. While such connecting rods are more robust than coupling bands, they cannot achieve the degree of non-vertical decoupling required for extremely high-resolution precision scales.

[0007] A plate-like coupling is known from US 4,703,816 A, mentioned at the beginning. The coupling plate disclosed therein consists of a flat, essentially rectangular, thicker upper plate and a thinner, inverted L-shaped lower plate. The upper plate has one upper hole; the lower plate has two lower holes. These serve for bolting the coupling plate to the load-bearing element or the first lever arm. The previously known coupling plate is equipped with two bending hinges spaced apart along the longitudinal direction of the plates. An upper bending hinge in the upper plate is located at the level of the upper hole and consists of a through slot semicircularly circumscribing the upper hole and two thin sections connecting the ends of the slot to the respective adjacent plate edges. Each of these thin sections is formed by two grooves cut into the opposite surfaces of the upper plate at the same level.This bending joint is designed to allow a purely bending movement of the lower part of the upper plate relative to its upper part. The lower plate is connected to the upper plate by a connecting link with a rectangular profile. The connecting link is attached centrally to the lower edge of the upper plate and centrally to the top of the short L-shaped beam of the lower plate. Its width is significantly narrower than the width of both the upper and lower plates. Its thickness is approximately half that of the upper plate or the length of the short L-shaped beam of the lower plate. This bending joint is intended to allow both bending and torsional movements of the lower plate relative to the upper plate. The heavy and robust construction is no longer suitable for the resolutions achievable with modern scales.

[0008] From EP 1 643 223 A1, a coupling band with two joint areas spaced apart in the longitudinal direction of the coupling band is known. The joint areas are each formed by two grooves opposite each other at the same height, extending over the entire width of the coupling band and cut into its respective surface. The publication discloses different groove shapes that can be used for this purpose and identifies those with a pointed groove base as particularly advantageous because a pivot axis can be defined with particular precision.

[0009] As purely exemplary examples for the preferred application area of ​​the present invention, comparators and high-resolution precision balances, in particular ultramicro balances and micro balances with load ranges between 2 g and 200 g at resolutions of 0.1 µg, 1 µm or up to 5 µg, are mentioned. Task

[0010] The object of the present invention is to provide a weighing system and a coupling belt for it that enable the construction of extremely high-resolution and at the same time robust scales. Description of the invention

[0011] This problem is solved by the features of claim 1, namely by the special design combination of the functional areas as - a thin-point joint which, in the longitudinal direction of the coupling band, has a thickness that initially decreases and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis that extends parallel to the width direction and perpendicular to the length direction of the coupling band, and - a resilience region which, in the longitudinal direction of the coupling band, has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes parallel to the first pivot axis, wherein further in the longitudinal direction between the thin-point joint and the resilience region a lateral pivot area is arranged, which consists of one or more parallel webs extending in the longitudinal direction of the coupling band, each having a web width that is less than the thickness of the coupling band in this area.

[0012] The problem is further solved by the features of claim 15, namely by a coupling band consisting of a sheet metal strip for vertical force transmission coupling between a load cell of a weighing system and a first lever arm of a lever of the weighing system, wherein two functional areas are formed spaced apart from each other in the longitudinal direction of the sheet metal strip, which are characterized by reduced width and reduced thickness compared to immediately adjacent areas, namely - a thin-point joint which, in the longitudinal direction of the coupling band, has a thickness that initially decreases and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis that extends parallel to the width direction and perpendicular to the length direction of the coupling band, and - a resilience region which, in the longitudinal direction of the coupling band, has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes parallel to the first pivot axis, wherein further in the longitudinal direction between the thin-point joint and the resilience region a lateral pivot area is arranged, which consists of one or more parallel webs extending in the longitudinal direction of the coupling band, each having a web width that is less than the thickness of the coupling band (30) in this area.

[0013] Preferred embodiments are the subject of the dependent claims.

[0014] The special feature of the present invention lies in the specific design of the coupling band, which is preferably made of a spring-elastic metal material, e.g., a copper-beryllium alloy. Initially, the concept of multiple functional areas, generally known from systems with connecting rods, is transferred to systems with coupling bands. These functional areas are characterized by tapers in thickness and width compared to the immediately adjacent areas, hereinafter referred to as secondary areas. However, the specific design of the functional areas, which cannot be adopted due to the different basic shapes of connecting rods on the one hand and coupling bands on the other, plays a crucial role in the effectiveness of the invention.In particular, the functional area designated as the thin-point joint is designed to form a precisely localized primary pivot axis around which the immediately adjacent secondary areas can perform a precisely defined pivoting movement relative to each other. The second functional area, on the other hand, forms a long-range resilience region which, unlike the thin-point joint, does not define a precisely localized pivot axis, but rather a long-range pivoting area. This can be understood as a continuous array of individual, parallel secondary pivot axes, whereby the secondary areas immediately adjoining the resilience region can perform a pivoting movement around one (arbitrary) or several of these secondary pivot axes simultaneously relative to each other, depending on the specific forces acting upon it in each case.For purely non-vertical decoupling of the load cell and lever, two spaced-apart thin-point hinges or a sufficiently long resilience region might suffice. However, with regard to robustness against acceleration forces, such as those that occur particularly during the transport or shipping of weighing systems or complete scales, this specific combination of thin-point hinge and resilience region has proven particularly effective, even though the mechanical interactions and force profiles are not fully understood in detail. The robustness achieved by the invention must therefore be considered an unforeseen, surprising effect.

[0015] Starting from an immediately adjacent secondary region on one side, the thickness profile of the thin-spot joint can be described such that the thickness of the coupling band decreases continuously, particularly monotonically (i.e., without any "counter-increases"), and then immediately increases again, also monotonically, after reaching its minimum thickness, until the thickness of the adjacent secondary region on the other side is reached. It has proven advantageous to design the surface profile symmetrically, preferably in both the longitudinal and thickness directions. In particular, the thin-spot joint can exhibit a biconcave or bifacial V-shaped thickness profile in the longitudinal direction.In the first case, the surface profile on both main surfaces of the coupling strip follows a circular arc, with the vertices of the arcs on the front and back surfaces being colocated in the longitudinal direction to form the sharply localized thickness minimum according to the invention. In the second case, the surface profile of the two main surfaces of the coupling strip initially follows a straight downward slope and then a straight upward slope (V-shape), with the two contact lines of the downward and upward slopes on the front and back surfaces of the coupling strip being colocated in the longitudinal direction to form the sharply localized thickness minimum according to the invention. While other thickness profile shapes are conceivable in principle, the aforementioned have proven to be particularly advantageous with regard to manufacturing, the preferred method of which will be discussed in more detail below.

[0016] The precise definition of the pivot axis provided by the thin-section joint can be further enhanced by a width profile of the coupling band that corresponds to the thickness profile. In a preferred embodiment of the invention, the thin-section joint has a width that initially decreases, particularly monotonically, in the longitudinal direction and, after reaching the point-like minimum width colocated with the associated minimum thickness, increases again, particularly monotonically. Here, too, a symmetrical design is particularly advantageous. In particular, the thin-section joint can have a biconcave or bilaterally V-shaped width profile in the longitudinal direction.In the first case, this means that the lateral edges of the coupling band in the area of ​​the thin-point joint each follow a circular arc, with the vertices of the circular arcs being colocated lengthwise with each other and, in particular, with the minimum thickness. In the second case, it is provided that the lateral edges of the coupling band in the area of ​​the thin-point joint initially run in a straight chamfer inwards and, after reaching the minimum width, immediately run outwards again in the same straight chamfer, with the two contact lines between the inward and outward chamfers on both edges of the coupling band being colocated lengthwise with each other and preferably also with the minimum thickness.

[0017] The length of the thin-spot joint, i.e., the distance between the two adjacent areas directly bordering the thin-spot joint on both sides, is preferably between 2 mm and 20 mm, particularly between 4 mm and 6 mm. The thickness of the thin-spot joint at its minimum thickness is preferably between 10 µm and 100 µm, particularly between 40 µm and 60 µm.

[0018] The shape of the resilience region is preferably similar, although—and this is the essential difference between the thin-site joint and the resilience region—the area of ​​minimum thickness extends over a larger length of the coupling ligament. The end regions of the resilience region, i.e., the transition zones to the immediately adjacent secondary regions, preferably exhibit a bifacially rounded or inclined thickness profile in the longitudinal direction. In the first case, the surface profile of the two main surfaces between the immediately adjacent secondary region and the area of ​​minimum thickness follows a circular path. In the second case, the surface profile follows a straight incline.

[0019] The resilience region is also preferably designed with a corresponding shape in terms of thickness and width. In other words, the resilience region has a width that initially decreases in the longitudinal direction and then increases again after reaching a minimum width that extends colocally with the associated minimum thickness. The end regions of the resilience region can exhibit a bilaterally rounded or straight, sloping width profile in the longitudinal direction.

[0020] Advantageously, the length of the resilience region, i.e., the distance between the immediately adjacent secondary regions on both sides, is between 5 mm and 50 mm, particularly between 6 mm and 10 mm. The thickness of the resilience region in the area of ​​its minimum thickness is preferably between 50 µm and 150 µm, particularly between 80 µm and 120 µm.

[0021] The length of the entire coupling band is preferably between 20 mm and 150 mm, and particularly between 80 mm and 100 mm. The width of the coupling band in the secondary areas is preferably between 5 mm and 10 mm.

[0022] In a particular embodiment of the invention, the coupling band is provided to have not just one, but several resilience regions. These can interact advantageously with regard to robustness, with each resilience region acting individually with respect to non-vertical decoupling, so that the overall achievable degree of decoupling is at least not worsened, and in some cases may even be improved.

[0023] As described so far, the inventive design of the coupling band allows for more (thin-point joint) or less (resilience region(s)) sharply localized pivoting movements of the secondary areas of the coupling band around pivot axes oriented perpendicular to the longitudinal and parallel to the lateral directions. However, the direction of acceleration forces occurring during the transport or shipping of weighing systems according to the invention is difficult to predict. Therefore, it is further provided according to the invention to additionally equip the coupling band with a lateral pivoting area that enables pivoting movements around pivot axes oriented perpendicular to the longitudinal and lateral directions.In particular, it is provided that a lateral pivoting area is additionally arranged on the coupling belt, namely in the longitudinal direction between the thin-point joint and the resilience region. This pivoting area consists of one or more parallel webs extending in the longitudinal direction of the coupling belt, each web having a width less than the thickness of the coupling belt in this area. Due to this relative dimensioning, said webs are more easily bent in the plane of the coupling belt, defined by its length and width, than perpendicular to it. This thus opens up an additional degree of pivoting freedom perpendicular to the pivoting freedom provided by the thin-point joint and the resilience region, which allows for the absorption of correspondingly directed acceleration forces. The overall robustness of the weighing system or coupling belt according to the invention is thereby further increased.

[0024] Regarding the manufacture of a coupling band according to the invention, it has proven advantageous to use a method comprising the following steps: - Providing a coupling band blank made of a spring-elastic metal sheet, - Laser processing of the coupling belt blank is used to create length sections of varying thickness and / or width. Compared to machining processes, this mechanically contactless laser processing has the advantage of not introducing any mechanical stresses into the coupling belt. Compared to chemical processes, such as lithography or etching, laser processing is significantly faster and less complex. Furthermore, it has proven extremely valuable in terms of the flexibility it offers in shaping the transition areas between functional and secondary regions.

[0025] Regardless of the specific processing method, the blank will preferably have a uniform thickness along its length, which is only changed in the functional area by the processing.

[0026] Further details and advantages of the invention will become apparent from the following specific description and the drawings. Brief description of the drawings

[0027] They show: Fig. 1: a schematic representation of a weighing system according to the invention, Fig. 2: a side view of a coupling band according to the invention, Fig. 3: A top view of the coupling strap of Fig. 2 as well as Fig. 4: A top view of an alternative embodiment of a coupling band according to the invention. Description of preferred embodiments

[0028] Identical reference symbols in the figures indicate identical or analogous elements.

[0029] Fig. Figure 1 shows a weighing system 10 according to the invention, already equipped with a load carrier 12. The weighing system 10 comprises a base that serves as a reference point for all movements within the weighing system 10. A load cell 18 is vertically movable (vertical movement arrow 20) on the base 14 via a Roberval mechanism with two parallel links 16. The load cell 18 is coupled to the load carrier 12 in such a way that the weight of a load placed on the load carrier 12 results in a vertical force being applied to the load cell 18.

[0030] Furthermore, the base 14 is coupled to a lever 24 via a lever joint 22. The lever 24 has a Fig. 1 to the left of the lever joint 22 shown, the first lever arm 241 and one in Fig. 1 to the right of the lever joint 22, the second lever arm 242 is shown. The coupling between the base 14 and the lever 24 is designed such that the lever 24 is in the drawing plane of Fig. 3 can perform a pivoting movement about the lever joint 22. A sensor receptacle 243 is arranged in the end region of the second lever arm 242. The sensor receptacle 243 serves to receive lever-side sensor components 261, which can interact with base-side sensor components 262 of an electronic sensor 26 fixed to the base 14. In particular, the sensor 26 can be a moving-coil arrangement that enables gravimetric measurement according to the principle of electromagnetic compensation known to those skilled in the art. However, within the scope of the invention, another type of sensor is also conceivable in principle.

[0031] In order to transmit the vertical weight forces exerted by the load on the load cell 18 to the lever 24, in particular its first lever arm 241, the load cell 20 is connected to the first lever arm 241 by means of a coupling band 30. Specifically, the coupling band 30 can be screwed or otherwise fixed to the load cell 20 on one side and to the first lever arm 241 on the other. Since the deflection movements of both the load cell 20 and the lever 24 are not purely linear but follow a circular arc motion, while the weight forces to be measured act purely vertically, the force transmission through the coupling band requires the most loss-free transmission possible of the vertical components and the decoupling of the non-vertical components.

[0032] For this purpose, the coupling ligament 30 has two functional areas, namely a thin-point joint 32 and a resilience region 34, the details of which are described below in the context of the Fig. 2 and Fig. 3 are to be described.

[0033] The Fig. 2 and Fig. Figure 3 shows a particularly preferred embodiment of a coupling belt according to the invention, as used in particular for constructing a weighing system according to Fig. 1 can be used. Fig. 2 and Fig. Three will be described together below.

[0034] The coupling band 30 is essentially designed as a specially shaped sheet metal strip, preferably made of a spring-elastic material, in particular a copper-beryllium alloy. Its total length can be, for example, approximately 60 mm. The coupling band 30 comprises several functional areas and areas arranged between or adjacent to them, which are generally referred to here as secondary areas. The terminal secondary areas 36 primarily serve to fix the coupling band 30 to the load-bearing device 18 or to the first lever arm 241. They are provided with through holes 361 through which fixing screws for clamping fixation to the load-bearing device 18 or the first lever arm 241 can be inserted. A first functional area is defined in the Fig. 2 and Fig. 3 A thin-point joint 32 adjacent to the right terminal side region 36 is provided. The thin-point joint 32 is characterized first by a tapering in both the thickness direction (cf. Fig. 2) as well as in the latitudinal direction (cf. Fig. 3) in the illustrated embodiment. In this embodiment, both the thickness and width reductions are symmetrical and biconcave. However, the radii of the biconcave constrictions are chosen differently. In particular, the radius of the thickness reduction is significantly larger than that of the width reduction. In the illustrated embodiment, the total length of the width reduction section is approximately twice the total length of the thickness reduction section. The latter can be approximately 3 mm, for example, so that the former, with such dimensions, is approximately 6 mm. The thickness reduction is essentially responsible for the function of the thin-point joint 32. Crucially, a well-defined, well-localized minimum thickness exists, which creates a sharply localized pivot axis 321.

[0035] A second functional area is in the Fig. 2 and Fig. 3 a resilience region 34 adjacent to the left, terminal side region 36 is provided. This region is also characterized by a tapering in the direction of thickness (cf. Fig. 2) as well as in the latitudinal direction (see Fig. 3) The tapering in the thickness direction has the form of bifacially symmetrical ramps that lead to a longer section of constant, minimum thickness. The tapering in the width direction, on the other hand, is formed as bilateral radii that transition into a longer area of ​​constant, minimum width. The overall lengths of the tapering sections in the thickness and width directions are chosen differently in the illustrated embodiment. In particular, the length of the tapering section in the width direction is chosen to be longer than the length of the tapering section in the thickness direction. The latter can, for example, be approximately 6 mm. The tapering in the thickness direction is primarily responsible for the function of the resilience region 34. Crucially, this requires a longer section with constant, minimum thickness, which creates a continuous set of pivot axes 341.

[0036] Furthermore, within the central secondary area 38 located between the thin-point joint 32 and the resilience region 34, another functional area, namely the lateral pivot area 39, is provided. In the illustrated embodiment, this consists of two elongated through-holes 391 adjacent to each other in the width direction of the coupling band 30, which create a web 392 between each other and between each other and the respective lateral edge of the secondary area 38. The width of these webs 392 is less than the thickness of the secondary area 38 at this point, so that pivoting in the plane of the coupling band, i.e., in the plane of the drawing, is possible. Fig. 3 results. It is also conceivable to use embodiments in which more or less than those in Fig. The three parallel webs 392 shown in section 3 are realized. In particular, it is possible to design the through holes 391 to be open laterally, so that the Fig. The 3 shown peripheral webs are omitted, and the lateral pivoting area 39 essentially consists only of a centrally arranged web 392. This embodiment exhibits particularly high lateral pivoting elasticity.

[0037] The interaction of the described functional areas, in particular the thin-point joint 32 and the resilience region 34, results not only in the desired non-vertical decoupling of load cell 18 and lever 24, but also in exceptional robustness of the weighing system 10 against acceleration forces. The packaging effort required for transporting such weighing systems can therefore be significantly reduced.

[0038] Fig. Figure 4 shows an alternative design of the coupling band 30, which, instead of a single resilience region 34, has three parallel resilience regions 34' spaced laterally apart by means of through holes. This design further increases the robustness of the weighing system without significantly impairing the decoupling of the non-vertical force components. Furthermore, the above-mentioned aspects can be fully applied. Fig. 3. Those who have been said will be referred.

[0039] Of course, the embodiments discussed in the detailed description and shown in the figures represent only illustrative examples of the present invention. In light of the disclosure herein, a wide range of variations is available to those skilled in the art. In particular, there is considerable freedom regarding the choice of the base material for the coupling band. Besides embodiments made of a single material, coupling band base bodies composed of several material components, for example, by additive manufacturing processes, are also conceivable. The specific dimensions must be adapted, in particular, to the intended use in scales and their intended load-bearing capacity and resolution. Reference symbol list 10 weighing system 12 weighing carriers 14 base 16 parallel linkages 18 load cells 20 Vertical movement arrow 22 Lever joint 24 levers 241 first lever arm 242 second lever arm 26 Sensor 261 lever-side sensor component 262 base side lever component 30 coupling strap 32 Thin-point joint 321 Swivel axis 34, 34' Resilience region 341 sets of swivel axes 36 terminal ancillary area 361 Through hole 38 central annex 39 Lateral swivel range 391 Through hole 392 Steg

Claims

[1] Weighing system (10) comprising a base (14), a load sensor (18) coupled vertically to the base (14) by means of a parallel link arrangement and a lever (24) pivotally connected to the base (14) by means of a lever joint (22) with a first lever arm (241) arranged on one side of the lever joint (22) and a second lever arm (242) arranged on the other side of the lever joint (22) and provided for receiving a sensor arrangement, wherein the first lever arm (241) is coupled to the load-bearing device (18) in a vertically force-transmitting manner by means of a coupling band (30) fixed to both it and the load-bearing device (18), wherein the coupling band (30) has two functional areas which are distinguished from immediately adjacent areas by reduced width and reduced thickness, namely - a thin-point joint (32) which has a thickness that initially decreases in the longitudinal direction of the coupling band (30) and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis (321) which extends parallel to the width direction and perpendicular to the length direction of the coupling band (30), - a resilience region (34, 34') which, in the longitudinal direction of the coupling band (30), has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes (341) parallel to the first pivot axis (321), and wherein, further in the longitudinal direction between the thin-point joint (32) and the resilience region (34, 34'), a lateral pivot area (39) is arranged, which consists of one or more parallel webs (392) extending in the longitudinal direction of the coupling band (30), each having a web width that is less than the thickness of the coupling band (30) in this area. [2] Weighing system (10) according to claim 1, characterized by , that the thin-point joint (32) has a biconcave or bifacial V-shaped thickness profile in the longitudinal direction. [3] Weighing system (10) according to any one of the preceding claims, characterized by , that the thin-point joint (32) has a width that initially decreases in the longitudinal direction and, after reaching a point minimum in width that is colocalized with the associated minimum in thickness, increases again. [4] Weighing system (10) according to claim 3, characterized by , that the thin-point joint (32) has a biconcave or bilateral V-shaped width profile in the longitudinal direction. [5] Weighing system (10) according to any one of the preceding claims, characterized by , that the thin-point joint (32) has a length between 2 mm and 20 mm, in particular between 4 mm and 6 mm. [6] Weighing system (10) according to any one of the preceding claims, characterized by , that the thin-point joint (32) has a thickness at its minimum thickness between 10 µm and 100 µm, in particular between 40 µm and 60 µm. [7] Weighing system (10) according to any one of the preceding claims, characterized by, that the end regions of the resilience region (34, 34') exhibit a bifacially rounded or oblique thickness profile in the longitudinal direction. [8] Weighing system (10) according to any one of the preceding claims, characterized by , that the resilience region (34, 34') has a width that initially decreases in the longitudinal direction and, after reaching a width minimum that extends colocally with the associated thickness minimum, increases again. [9] Weighing system (10) according to any one of the preceding claims, characterized by , that the resilience region (34, 34') has a length between 5 mm and 50 mm, in particular between 6 mm and 10 mm. [10] Weighing system (10) according to any one of the preceding claims, characterized by , that the resilience region (34, 34') has a thickness between 50 µm and 150 µm, in particular between 80 µm and 120 µm, in the area of ​​its minimum thickness. [11] Weighing system (10) according to any one of the preceding claims, characterized by, that the coupling ligament has several resilience regions (34'). [12] Weighing system (10) according to claim 11, characterized by , that the multiple resilience regions (34') are arranged parallel to each other. [13] Weighing system (10) according to any one of the preceding claims, characterized by , that the length of the coupling strap (30) is between 20 mm and 150 mm, in particular between 80 mm and 100 mm. [14] Weighing system (10) according to any one of the preceding claims, characterized by , that the width of the coupling band (30) outside the functional areas (32; 34, 34') and the lateral swivel range (39) is between 5 mm and 10 mm. [15] Coupling band (30), consisting of a sheet metal strip, for vertical force transmission coupling between a load sensor (18) of a weighing system (10) and a first lever arm (241) of a lever (24) of the weighing system (10), wherein two functional areas are formed spaced apart from each other in the longitudinal direction of the sheet metal strip, which are characterized compared to immediately adjacent areas by reduced width and reduced thickness, namely - a thin-point joint (32) which has a thickness that initially decreases in the longitudinal direction of the coupling band (30) and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis (321) which extends parallel to the width direction and perpendicular to the length direction of the coupling band (30), - a resilience region (34, 34') which, in the longitudinal direction of the coupling band (30), has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes (341) parallel to the first pivot axis (321), and wherein, further in the longitudinal direction between the thin-point joint (32) and the resilience region (34, 34'), a lateral pivot area (39) is arranged, which consists of one or more parallel webs (392) extending in the longitudinal direction of the coupling band (30), each having a web width that is less than the thickness of the coupling band (30) in this area. [16] Coupling strap (30) according to claim 15, characterized by , that it has several resilience regions (34'). [17] Coupling strap (30) according to claim 16, characterized by, that the multiple resilience regions (34') are arranged parallel to each other. [18] Coupling band (30) according to one of claims 15 to 17, obtained by - Providing a coupling band blank made of a spring-elastic metal sheet, - Laser processing of the coupling band blank to create length sections of different thickness and / or width.

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