Weighing system and connecting strip

Abstract

The present invention relates to a weighing system 10, which comprises a base 14, a load receptor 18 connected to the base 14 so as to be vertically movable using a parallel connecting rod assembly, and a lever 24 pivotally attached to the base 14 so as to be pivotable using a lever link section 22, having a first lever arm 241 positioned on one side of the lever link section 22 and a second lever arm 242 positioned on the other side of the lever link section 22 and configured for housing a sensor assembly, wherein the first lever arm 241 is connected to the load receptor 18 so as to transmit vertical force using a connecting strip 30 fixed to the first lever arm and the load receptor 18. The present invention is characterized by the fact that the connecting strip 30 has two functional regions, each characterized by a reduced width and reduced thickness compared to directly adjacent regions: - a thin-walled joint 32 having a thickness that first decreases in the longitudinal direction of the connecting strip 30, and then increases again after reaching a minimum point of thickness, in order to define a localized pivot axis 321 extending parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip 30; and - elastic regions 34, 34' having a thickness that first decreases in the longitudinal direction of the connecting strip 30, and then increases again after reaching a minimum point of thickness, in order to define a continuous group of second pivot axes 341 parallel to the first pivot axis 321.

Description

Technical Field

[0001] The present invention relates to a weighing system, wherein the weighing system has a base part, a load receptor movably connected to the base part in the vertical direction by using a parallel connecting rod assembly, a lever pivotally attached to the base part so as to be pivotable by using a lever link part having a first lever arm disposed on one side of the lever link part and a second lever arm disposed on the other side of the lever link part and configured for accommodating a sensor assembly, and is provided with wherein the first lever arm is connected to the load receptor so as to transmit a vertical force by using a connecting strip fixed to the first lever arm and the load receptor.

[0002] The present invention further relates to a connecting strip, and the connecting strip is composed of a metal sheet strip for connecting to transmit a vertical force between a load receptor of such a weighing system and a first lever arm of a lever of the weighing system.

Background Art

[0003] A weighing system in the manner described at the beginning and a connecting strip for this weighing system are known from Patent Document 1.

[0004] A central component of a weighing device operating on the principle of electronic, particularly electromagnetic, compensation is the weighing system of this weighing device. Under the concept of a weighing system, a mechanical lever mechanism is understood here, and by using this lever mechanism, a weighing object carrier of a weighing device used for accommodating a weighing object to be weighed is connected to an electric sensor of the weighing device and a movable coil assembly having a typically optical lever position detection device. The weighing system has a base part, and by using this base part, the weighing system can be fixed to a platform or a casing of the weighing device. The so-called load receptor is pivotally attached to the aforementioned base via a parallel connecting rod assembly often referred to as the Robertval mechanism. The weighing object carrier, already described above, is indirectly or directly fixed to the load receptor in the final assembled state of the weighing device. The parallel connecting rod assembly is used to prevent the tilting of the load receiver or weighing object carrier, at least in the case of small displacements of the parallel connecting rods, where the displacement basically occurs on an arc with a radius equal to the length of the parallel connecting rods. Furthermore, a typical weighing system includes levers used for displacement and force transmission, which are pivotally attached to the base via lever links. To transmit to the lever the movement of a load receptor induced by the weight of the object being weighed, the first lever arm of the lever described above is connected to the load receptor. The second lever arm of this lever typically houses a lever-side component of an electronic sensor, in particular a movable coil, which interacts with yet another base-side sensor component, in particular a magnetic pot, which is assembled to the base, in a manner that is basically known and further unrelated to the present invention. This type of weighing system, in turn, embodies the central part of a weighing device, and a similar weighing system can be used within a weighing device otherwise equipped differently.

[0005] For the aforementioned connection between the first lever arm (Hebelband) and the load receptor, a connector, often commonly referred to as a coupling, is required, which is adapted to be sufficiently flexible to transmit vertical forces between the load receptor and the first lever arm, and to achieve isolation with respect to any non-vertical force components. As mentioned, the parallel connecting rod mechanism does indeed prevent the tilting of the load receptor; however, the arc motion of this load receptor does not prevent the equally inherent horizontal motion component alongside the vertical motion component. These motion components, however, should not be transmitted to the lever, because the corresponding non-vertical force components would inaccurate the measured metering value, which is unacceptable, especially in extremely high-resolution precision weighing devices. To satisfy both requirements, namely vertical connection and non-vertical separation, the connection described above can be formed as a so-called connecting strip, in the form of a thin metal sheet strip, as in the patent document formed in this manner described at the beginning. With a sufficiently thin configuration of the connecting strip, sufficient non-vertical separation is achievable even for extremely high-resolution weighing devices. However, it has been found that the corresponding weighing system is extremely vulnerable to lateral acceleration forces, which typically occur during transportation, particularly when the weighing device is shipped. Therefore, a great deal of effort must be spent on packaging the weighing device to ensure that the device, with its undamaged connected strip, reaches the recipient. The theoretical attempt to fix the connecting strip to the load receptor and the first lever arm only after the assembly of the weighing device at the destination is no longer practically feasible for regulatory reasons.

[0006] From Patent Document 2, a connecting body formed as a connecting rod is known, and this connecting body has functional regions that converge in thickness and width near the respective fixing regions of the load receptor and the first lever arm. Together, these functional regions generate the elasticity of the connecting body necessary for non-vertical separation. While this type of connecting rod is certainly stronger than a connecting strip, these connecting rods are not capable of achieving the degree of non-vertical separation required for extremely high-resolution precision weighing devices.

[0007] Advantageous applications of the present invention include, purely illustrative, comparators and high-resolution precision weighing devices, particularly ultra-micro weighing devices and micro weighing devices having a loading range between 2 g and 200 g with a resolution of 0.1 μg, 1 μg, or up to 5 μg. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] German Patent Application Publication No. 30 12 344 Specification A1 [Patent Document 2] German Patent Application Publication No. 3242957 Specification A1 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The object of the present invention is to provide a weighing system and a connecting strip for this weighing system, which enables a weighing device with extremely high resolution and at the same time robustness. [Means for solving the problem]

[0010] This issue, in relation to the features of the higher-level concept of claim 1, The connected strip-shaped body, Two functional regions, each characterized by a reduced width and reduced thickness compared to its directly adjacent region, namely, - In order to define a localized first pivot axis extending parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip, a thin-walled joint portion is provided, having a thickness that first decreases in the longitudinal direction of the connecting strip, and then increases again after reaching a minimum point of thickness. - In order to define a continuous group of second pivot axes parallel to the first pivot axis, the connecting strip has, in its longitudinal direction, a thickness that first decreases, and after reaching the minimum thickness, a constant thickness over a section corresponding to at least the width of the elastic region, and Next, there is an elastic region having an increasing thickness again, It has This will resolve the issue.

[0011] This issue is further addressed in relation to the features of the broader concept of claim 16, Two functional regions are spaced apart from each other in the longitudinal direction of the thin metal strip, namely, - In order to define a localized first pivot axis extending parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip, a thin-walled joint portion is provided, having a thickness that first decreases in the longitudinal direction of the connecting strip, and then increases again after reaching a minimum point of thickness. - In order to define a continuous group of second pivot axes parallel to the first pivot axis, the connecting strip has, in its longitudinal direction, a thickness that first decreases, and after reaching the minimum thickness, a constant thickness over a section corresponding to at least the width of the elastic region, and Next, there is an elastic region having an increasing thickness again, It is formed This will resolve the issue. [Effects of the Invention]

[0012] A favorable embodiment is the subject of a dependent claim.

[0013] The advantage of the present invention lies in the special shaping of a connected strip-shaped body made from a spring-elastic metallic material, such as a copper-beryllium alloy. First of all, the idea of a plurality of functional regions characterized by a convergence in the thickness and width directions of regions that are directly adjacent and hereinafter referred to as adjacent regions, which are basically known from systems having a connecting rod, is transferred to a system having a connecting strip. However, a special configuration of the functional regions that cannot be inherited based on the different basic shapes of the connecting rod on the one hand and the connecting strip on the other hand plays a role for the effectiveness of the present invention. A functional region, particularly referred to as a thin-walled joint part, is configured to form an exactly localized first axis of rotation, around which directly adjacent adjacent regions can perform an exactly defined rotational movement relative to each other. In contrast, a second functional region forms an elastically long-extending region that, in contrast to the thin-walled joint part, does not define any exactly localized axis of rotation, but rather defines an elastically long-extending region of rotation. This region of rotation can be understood as a continuous group of individual, parallel second axes of rotation, whereupon directly adjacent regions connecting to the elastically long-extending region can perform a rotational movement relative to each other simultaneously around one (appropriate) or a plurality of second axes of rotation depending on the specifically acting forces in each individual case. For a purely non-vertical separation of the load receptor and the lever, in some cases, two thin-walled joint parts spaced apart from each other or an elastically long-extending region that is sufficiently long are sufficient. Regarding the toughness against accelerating forces, such as those occurring particularly during the transport or shipping of a metering system or a complete set of metering devices, although the mechanical interactions and the course of forces are not fully understood individually in each case, it has been found that this special combination of a thin-walled joint part and an elastically long-extending region is particularly effective. The toughness achieved by the present invention should rather be regarded as an unexpected, unforeseen effect.

[0014] On the one hand, starting from the directly adjacent adjacent regions, the thickness progression of the thin-walled joint part is such that the thickness of the connecting strip gradually decreases, especially monotonically, i.e., without "reverse increase", and after reaching the minimum thickness part, on the other hand, it increases again without delay, especially also monotonically, until the thickness of the adjacent adjacent region is reached. The surface progression, in contrast, and advantageously also in the thickness direction in the same way as the longitudinal direction, has been found to be advantageously configured. In particular, it is possible for the thin-walled joint part to have a thickness progression that is concave on both sides or V-shaped on both sides in the longitudinal direction. In the first-mentioned case, the surface progression on both main surfaces of the connecting strip follows an arc, and in order to form the sharply localized (sharply positioned) minimum thickness part according to the present invention, the vertices of these arcs are co-localized (present at the same position) in the longitudinal direction on the front side and the rear side. In the second-mentioned case, the surface progression on both main surfaces of the connecting strip first follows a linearly descending gradient and then a linearly ascending gradient (V-shaped), and in order to form the sharply localized minimum thickness part according to the present invention, both contact lines consisting of the descending gradient and the ascending gradient are co-localized in the longitudinal direction on the front side and the rear side of the connecting strip. Basically, although other thickness progression shapes are of course conceivable, these progression shapes described above have been found to be particularly advantageous with respect to the manufacturing, which should be further described in more detail below with regard to the advantageous structure and manner of its manufacturing.

[0015] The exact definition of the axis of rotation provided by the thin-walled joint part can be sharpened more by the width progression corresponding to the thickness progression of the connecting strip. Accordingly, in an advantageous further configuration of the present invention, it is intended that the thin-walled joint portion has, firstly, a width that decreases particularly monotonically in the longitudinal direction, and then, after reaching a point-like minimum width colocalized with the minimum thickness, a width that increases again particularly monotonically. Similarly, contrasting configurations are particularly advantageous here as well. In particular, it is possible that the thin-walled joint portion is intended to have a biconcave or bilaterally V-shaped width in the longitudinal direction. In the first case, the lateral edges of the connecting strips each follow a single arc within the region of the thin-walled joint, and it is meant that the vertices of these arcs are colocalized with each other, and in particular with the minimum thickness, in the longitudinal direction. In the second case, the lateral edges of the connecting strip are intended to first be linearly inclined inward within the region of the thin-walled joint, and after reaching the minimum width, to extend outward without delay, again linearly inclined in the same manner, where both contact lines between the inward and outward inclinations are colocalized with each other in the longitudinal direction at both edges of the connecting strip, and also, advantageously, colocalized with the minimum thickness.

[0016] The length of the thin-walled joint, that is, the distance between the two adjacent regions that directly adjoin the thin-walled joint on both sides, is advantageously between 2 mm and 20 mm, particularly between 4 mm and 6 mm. The thickness of the thin-walled joint at its minimum thickness is preferably between 10 μm and 100 μm, particularly between 40 μm and 60 μm.

[0017] With regard to shaping the elastic region, the same is advantageous, however—there is a significant difference between the thin-walled joint and the elastic region—where the region of minimum thickness extends over the longer portion of the connecting strip. The end regions of the elastic region, that is, the transition regions to directly adjacent regions, have a thickness gradient that is rounded or inclined on both sides in the longitudinal direction. In the first case, the surface trajectories of both principal surfaces between directly adjacent regions and the region of minimum thickness follow circular orbits. In the second case, the surface trajectories follow linear inclines.

[0018] With respect to the elastic region, it is advantageous that a corresponding shape is intended with respect to the thickness and width. In other words, the elastic region has a width that first decreases in the longitudinal direction, and after reaching the minimum width which is colocalized with the minimum thickness, it has a width that increases again. In that case, the end region of the elastic area may have a width that is rounded on both sides or linearly inclined in the longitudinal direction.

[0019] In a favorable manner, the length of the elastic region, i.e., the distance between directly adjacent regions on both sides, is between 5 mm and 50 mm, particularly between 6 mm and 10 mm. The thickness of the elastic region is, within the region of minimum thickness of this elastic region, advantageously between 50 μm and 150 μm, particularly between 80 μm and 120 μm.

[0020] The overall length of the connecting strip is advantageously between 20 mm and 150 mm, particularly between 80 mm and 100 mm. The width of the connecting strip within the adjacent region is preferably between 5 mm and 10 mm.

[0021] In a particularly excellent embodiment of the present invention, it is intended that the connected strip has not just one elastic region, but rather multiple elastic regions. These multiple elastic regions can cooperate advantageously, taking toughness into consideration, and in doing so, each elastic region acts individually in relation to non-vertical separation, and therefore the overall achievable degree of separation is not reduced, and in many cases, is even improved.

[0022] To the extent described above, the shaping of the connecting strip according to the present invention enables rotational movement of adjacent regions of the connecting strip that are more (thin-walled joints) or less (elastic regions) sharply colocalized around a pivot axis aligned perpendicular to the longitudinal direction and parallel to the width direction. Indeed, the acceleration forces generated during the transport or dispatch of the weighing system according to the present invention are, however, difficult to predict in the direction of these acceleration forces. Therefore, it has been found to be advantageous to further provide the connected strip-shaped body according to the present invention with a lateral rotation region that enables rotational motion about a rotation axis aligned perpendicular to the longitudinal and width directions. In particular, in a further configuration of the present invention, additionally, on the connecting strip-shaped body, In the longitudinal direction, a lateral rotation region is located particularly between the thin-walled joint and the elastic region. This lateral rotation region consists of one web or multiple parallel webs extending in the longitudinal direction of the connected strip-like body, each of which has a web width of one. This web width is smaller than the thickness of the connecting strip within this region. It is possible that this is intended. Based on these relative dimensions, the web described above can bend more easily within the plane of the connecting strip, which is defined by the length and width of the connecting strip, than in the direction perpendicular to this plane. As a result, another rotational degree of freedom is opened perpendicular to the rotational degree of freedom opened by the thin-walled joint and the elastic region, and this rotational degree of freedom allows for the correspondingly aligned restraint of acceleration forces. The overall toughness of the metering system or connecting strip according to the present invention is further improved by this.

[0023] With regard to the production of a connected strip-shaped body according to the present invention, it has been found that it is advantageous to use one method for this purpose. This method involves the following steps: - Preparation of a semi-finished product consisting of a spring-elastic thin metal sheet, - Laser processing of connected strip-shaped semi-finished products for forming length regions of different thicknesses and / or widths, It has the following steps. Mechanically non-contact laser processing has the advantage of not introducing any mechanical stress to the connected strip compared to cutting methods. Compared to chemical methods, such as lithographic or etching methods, laser processing is clearly faster and less labor-intensive. In addition, this laser processing proved to be remarkably beneficial, considering the flexibility it offers in shaping the transition area between the functional region and the adjacent region.

[0024] Without relying on special processing methods, the semi-finished product advantageously has a uniform thickness over its length, and this thickness is altered by processing only within the functional area.

[0025] Further details and advantages of the present invention are given in the following special description and from the figures. [Brief explanation of the drawing]

[0026] [Figure 1] This is a schematic diagram of a weighing system according to the present invention. [Figure 2] This is a side view of a connected strip-shaped body according to the present invention. [Figure 3] Figure 2 is a plan view of the connected strip-shaped body. [Figure 4] This is a plan view of a selective embodiment of a connected strip-shaped body according to the present invention. [Modes for carrying out the invention]

[0027] The same reference numerals within the figure indicate the same or similar elements.

[0028] Figure 1 shows a weighing system 10 according to the present invention, which already includes a weighing material carrier 12. The weighing system 10 includes a base, which is used as a reference point for all movement within the weighing system 10. A load receptor 18 is pivotally attached to the base 14 via a Robertval mechanism having two parallel connecting rods 16, allowing it to move vertically (vertical movement arrow 20). The load receptor 18 is connected to the weighing object carrier 12 such that the weight of the weighing object placed on the weighing object carrier 12 induces a vertical force load on the load receptor 18.

[0029] Furthermore, the base portion 14 is connected to the lever 24 via the lever link portion 22. The lever 24 has a first lever arm 241 shown to the left of the lever link portion 22 in Figure 1, and a second lever arm 242 shown to the right of the lever link portion 22 in Figure 1. The connection between the base 14 and the lever 24 is configured such that the lever 24 can perform a pivoting motion around the lever link 22 in the plane shown in Figure 1. A sensor housing 243 is located within the end region of the second lever arm 242. The sensor housing 243 is used to house the lever-side sensor components 261, which can interact with the base-side sensor components 262 of the electronic sensor 26, which are fixed to the base 14. In particular, the sensor 26 may be a movable coil assembly (Tauchspulenanordnung), which enables gravimetric measurement of electromagnetic compensation according to principles well known to those skilled in the art. Within the scope of the present invention, however other forms of sensor systems are also basically conceivable.

[0030] To enable the transmission of the vertical weight acting from the weighing object onto the load receptor 18 to the lever 24, particularly to the first lever arm 241 of the lever, the load receptor 18 is connected to the first lever arm 241 using a connecting strip 30. In particular, the connecting strip 30 may be screwed to the load receptor 18 on one side and to the first lever arm 241 on the other side, or fixed in other ways. The displacement motion between the load receptor 18 and the lever 24 is not purely linear, but rather follows an arc motion, and the weight to be measured acts purely vertically. Therefore, when force is transmitted by the connecting band, it is necessary to transmit the vertical component with as little loss as possible and separate the non-vertical component.

[0031] For this purpose, the connecting strip 30 has two functional regions, namely a thin-walled joint 32 and an elastic region 34, the details of which will be described below in relation to Figures 2 and 3.

[0032] Figures 2 and 3 show particularly advantageous embodiments of the connected strips according to the present invention, which may be used, in particular, for constructing a weighing system according to Figure 1. Figures 2 and 3 are both described below.

[0033] The connecting strip 30 is essentially formed as a specially shaped thin metal strip, advantageously made of a spring-elastic metal, particularly a copper-beryllium alloy. The total length of this connecting strip can be, for example, 60 mm. The connecting strip-shaped body 30 comprises multiple functional areas and areas located between these functional areas or adjacent to these functional areas, which are generally referred to here as adjacent areas. The adjacent area 36 of the terminal is primarily used for fixing the connecting strip 30 to the load receptor 18 or the first lever arm 241. These adjacent areas of the terminal are provided with through-holes 361, through which fixing screws can be guided for tightening and fixing to the load receptor 18 or the first lever arm 241. As the first functional area, a thin-walled joint portion 32 is provided adjacent to the adjacent area 36 of the right-hand terminal in Figures 2 and 3. The thin-walled joint portion 32 is primarily characterized by converging portions in the thickness direction (see Figure 2) and the width direction (see Figure 3). In the shown embodiment, the thickness-converging portion and the width-converging portion have symmetrical, biconcave characteristics. However, the radii of the narrow portions of the biconcave shape are selected differently. In particular, the radius of the thickness-converging portion is clearly selected to be larger than the radius of the width-converging portion. In the illustrated embodiment, the total length of the width-converging portion is approximately twice the total length of the thickness-converging portion. The latter thickness-converging portion can be, for example, about 3 mm, and therefore the former width-converging portion is about 6 mm in such a dimensional setting. The thickness convergence portion is essentially responsible for the function of the thin-walled joint portion 32. It is important that there is a clearly defined, well-localized minimum thickness portion, and that this minimum thickness portion provides a sharp and precisely localized pivot axis 321.

[0034] As a second functional area, an elastic area 34 is provided adjacent to the adjacent area 36 of the left terminal in Figures 2 and 3. This elastic area is also characterized by a convergence portion in the thickness direction (see Figure 2) and the width direction (see Figure 3). The converging portion in the thickness direction has the shape of a bifazial symmetrical slope (Schraegrampen) 342, which induces a longer portion of a constant minimum thickness. Conversely, the converging portion in the width direction is formed as rounded portions on both sides, which transition into a longer region of a constant minimum width. The total length of the converging portion in the thickness direction and the width direction is selected differently in the illustrated embodiment. In particular, the length of the converging portion in the width direction is selected to be longer than the length of the converging portion in the thickness direction. The latter, the converging portion in the thickness direction, can be, for example, about 6 mm. The function of the elastic region 34 is particularly responsible for the convergence in the thickness direction. The presence of a longer portion with a constant minimum thickness is important, as this portion provides a continuous group of pivot axes 341.

[0035] In the illustrated embodiment, another functional region, namely a lateral rotation region 39, is provided inside the adjacent region 36 of the terminal of the central adjacent region 38, which is located between the thin-walled joint portion 32 and the elastic region 34. In the illustrated embodiment, this lateral pivot region consists of two elongated through-holes 391 adjacent to each other in the width direction of the connecting strip 30, and these through-holes form a web 392 between each other and between the through-holes themselves and the respective lateral edges of the central adjacent region 38. The width of these webs 392 is smaller than the thickness of the adjacent region 38 at this position, and thus pivotability occurs within the plane of the connecting strip, i.e., within the illustrated plane of Figure 3. Embodiments can also be considered in which more or fewer webs result from the three parallel webs 392 shown in Figure 3. In particular, the through-hole 391 can be configured to open to the sides, so that the edge-located webs shown in Figure 3 are omitted, and the lateral rotation region 39 consists basically of only the centrally located web 392. This embodiment exhibits particularly high lateral rotation elasticity.

[0036] The cooperation of the described functional areas, particularly the thin-walled joint 32 and the elastic area 34, along with the desired non-vertical separation of the load receptor 18 and the lever 24, induces exceptional toughness of the weighing system 10 against accelerating forces. The packaging effort spent during the transport of such a weighing system 10 can therefore be significantly reduced.

[0037] Figure 4 shows a selective configuration of the connecting strip 30, which has three elastic regions 34' arranged in parallel and spaced apart laterally by through-holes, instead of a single elastic region 34. Such a configuration can further improve the toughness of the weighing system without significantly reducing the separation of non-vertical force components. For other points, please refer to the above-mentioned information in relation to Figure 3, which is quite extensive.

[0038] Needless to say, the embodiments described in the special description and shown in the figures are merely illustrative examples for illustrative purposes of the present invention. Those skilled in the art will be provided with a wide variety of possible modifications within the scope of the disclosure herein. In particular, there is considerable freedom in the selection of base materials for the connected strip-like structures. Alongside single-material embodiments, connected strip-like base bodies assembled by, for example, additive manufacturing methods, consisting of multiple material components, can also be considered. Special dimensional settings should be adapted to the intended load capacity and resolution of these weighing devices, particularly in their planned use within weighing devices. While this application relates to the invention described in the claims, it may also encompass the following other embodiments. 1. A weighing system (10), wherein this weighing system is Foundation (14), A load receptor (18) is connected to a base (14) so ​​as to be movable in the vertical direction using a parallel connecting rod assembly. A lever (24) pivotally attached to a base (14) so ​​as to be rotatable using the lever link portion (22), having a first lever arm (241) positioned on one side of the lever link portion (22) and a second lever arm (242) positioned on the other side of the lever link portion (22) and configured for housing a sensor assembly, It is equipped with, A first lever arm (241) is connected to a load receptor (18) using a connecting band (30) fixed to the first lever arm and the load receptor (18) in order to transmit a vertical force. In the above measurement system, The connected strip-shaped body (30) Two functional regions, each characterized by a reduced width and reduced thickness compared to its directly adjacent region, namely, - In order to define a localized first pivot axis (321) extending parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip (30), the connecting strip (30) has a thin-walled joint portion (32) that first decreases in thickness in the longitudinal direction, and then increases again after reaching a minimum point of thickness, - In order to define a continuous group of second pivot axes (341) parallel to the first pivot axis (321), the connecting strip (30) has elastic regions (34, 34') in the longitudinal direction, which first have decreasing thickness, then, after reaching the minimum thickness, have a constant thickness over a section corresponding to at least the width of the elastic region, and then have increasing thickness again. A weighing system (10) characterized by having the following. 2. The weighing system (10) according to claim 1 above, characterized in that the thin-walled joint portion (32) has a thickness profile that is double-concave or V-shaped on both sides in the longitudinal direction. 3. The thin-walled joint portion (32) has a width that first decreases in the longitudinal direction, and, The weighing system (10) according to claim 1 or 2, characterized in that it has a width that increases again after reaching a minimum point width that is colocalized with the minimum portion of the allocated thickness. 4. The weighing system (10) according to item 3 above, characterized in that the thin-walled joint portion (32) has a width that is double-concave or V-shaped on both sides in the longitudinal direction. 5. The weighing system (10) according to any one of claims 1 to 4 above, characterized in that the thin-walled joint portion (32) has a length between 2 mm and 20 mm, particularly between 4 mm and 6 mm. 6. The thin-walled joint portion (32) has the minimum thickness of the thin-walled joint portion, A weighing system (10) according to any one of items 1 to 5 above, characterized in that it has a thickness between 10 μm and 100 μm, particularly between 40 μm and 60 μm. 7. The weighing system (10) according to any one of 1 to 6 above, characterized in that the end region of the elastic region (34, 34') has a thickness that is rounded on both sides in the longitudinal direction or has an inclined thickness. 8. The elastic region (34, 34') has a width that decreases first in the longitudinal direction, and, A weighing system (10) according to any one of 1 to 7 above, characterized in that it has a width that increases again after reaching a minimum width that is colocalized with and extends to the minimum thickness of the assigned portion. 9. The weighing system (10) according to any one of items 1 to 8 above, characterized in that the elastic region (34, 34') has a length between 5 mm and 50 mm, particularly between 6 mm and 10 mm. 10. The elastic region (34, 34') is defined as having the minimum thickness of this elastic region. A weighing system (10) according to any one of items 1 to 9 above, characterized in that it has a thickness between 50 μm and 150 μm, particularly between 80 μm and 120 μm. 11. The weighing system (10) according to any one of claims 1 to 10 above, characterized in that the connected strip has a plurality of elastic regions (34'). 12. The weighing system (10) according to 11, characterized in that the multiple elastic regions (34') are arranged in parallel to each other. 13. In the longitudinal direction, a lateral rotation region (39) is located between the thin-walled joint portion (32) and the elastic region (34, 34'). This lateral rotation region consists of one web or multiple parallel webs (392) extending in the longitudinal direction of the connecting strip-shaped body (30), each of which has a web width of one. A weighing system (10) according to any one of 1 to 12 above, characterized in that the web width is smaller than the thickness of the connecting strip-shaped body (30) within this region. 14. A weighing system (10) according to any one of 1 to 13 above, characterized in that the length of the connecting strip-shaped body (30) is between 20 mm and 150 mm, particularly between 80 mm and 100 mm. 15. A weighing system (10) according to any one of 1 to 14, characterized in that the width of the connecting strip (30) outside the functional area (32; 34, 34') and, - to the extent provided - outside the lateral rotation area (39) is between 5 mm and 10 mm. 16. A connected strip-shaped body (30), This connecting strip consists of a thin metal strip for connecting the load receptor (18) of the weighing system (10) and the first lever arm (241) of the lever (24) of the weighing system (10) to transmit vertical force. In the above-mentioned connected strip-shaped body (30), Two functional regions, separated from each other in the longitudinal direction of a thin metal strip, are characterized by reduced width and reduced thickness compared to directly adjacent regions, namely, - In order to define a localized first pivot axis (321) extending parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip (30), the connecting strip (30) has a thin-walled joint portion (32) that first decreases in thickness in the longitudinal direction, and then increases again after reaching a minimum point of thickness, - In order to define a continuous group of second pivot axes (341) parallel to the first pivot axis (321), the connecting strip (30) has elastic regions (34, 34') in the longitudinal direction, which first have decreasing thickness, then, after reaching the minimum thickness, have a constant thickness over a section corresponding to at least the width of the elastic region, and then have increasing thickness again. A connected strip-shaped body (30) characterized by having a structure formed thereon. 17. The connected strip (30) according to 16 above, characterized in that the connected strip (30) has a plurality of elastic regions (34'). 18. The connected strip-shaped body (30) according to 17 above, characterized in that the multiple elastic regions (34') are arranged in parallel to each other. 19. Preparation of a semi-finished product consisting of a spring-elastic thin metal sheet, - Laser processing of connected strip-shaped semi-finished products for forming length regions of different thicknesses and / or widths, A connected strip-shaped body (30) according to any one of the above 16 to 18, characterized in that it is manufactured by the method described above. [Explanation of Symbols]

[0039] 10 Weighing Systems 12 Weighing Carrier 14 Foundation 16 Parallel connecting rod 18 Load receptors 20 Vertical motion arrows 22 Lever link section 24 Lever 241 First lever arm 242 Second lever arm 26 sensors 261 Lever-side sensor component 262 Lever component on the base side 30 Connected strip-shaped body 32 Thin-walled joint 321 Swivel axis 34 Elastic region 34' Elastic region 341 A group of pivot axes (Schaar) 36 Adjacent area of ​​the terminal 361 Through-hole drilling 38 Central adjacent area 39 Lateral rotation area 391 Through-hole drilling 392 Web

Claims

1. A weighing system (10), wherein this weighing system is The base (14) and A load receptor (18) is connected to a base (14) so ​​as to be movable in the vertical direction using a parallel connecting rod assembly, A lever (24) pivotally attached to a base (14) so ​​as to be rotatable using the lever link portion (22), having a first lever arm (241) positioned on one side of the lever link portion (22) and a second lever arm (242) positioned on the other side of the lever link portion (22) and configured for housing a sensor assembly, It is equipped with, The first lever arm (241) is connected to the load receptor (18) using a connecting band (30) fixed to the first lever arm and the load receptor (18) to transmit a vertical force. In the above measurement system, The connected strip-shaped body (30) Two functional regions, each characterized by a reduced width and reduced thickness compared to its directly adjacent region, namely, - In order to define a localized pivot axis (321) that extends parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip-shaped body (30), In the longitudinal direction of the connecting strip-shaped body (30), the thin-walled joint portion (32) has a thickness that first decreases, and then increases again after reaching the minimum point of thickness, - In order to define a continuous group of second pivot axes (341) parallel to the first pivot axis (321), In the longitudinal direction of the connected strip-shaped body (30), firstly, the thickness decreases, After reaching the minimum thickness, it has a constant thickness over a section corresponding to at least the width of the elastic region, and Next, there is an elastic region (34, 34') which has an increasing thickness, A weighing system (10) characterized by having the following features.

2. The weighing system (10) according to claim 1, characterized in that the thin-walled joint portion (32) has a thickness progression in the longitudinal direction that is double-concave or V-shaped on both sides.

3. The thin-walled joint portion (32) has a width that first decreases in the longitudinal direction, and The weighing system (10) according to claim 1 or 2, characterized in that it has a width that increases again after reaching a minimum point width that is colocalized with the minimum thickness of the assigned portion.

4. The weighing system (10) according to claim 3, characterized in that the thin-walled joint portion (32) has a width that is double-concave or V-shaped on both sides in the longitudinal direction.

5. The weighing system (10) according to any one of claims 1 to 4, characterized in that the thin-walled joint portion (32) has a length between 2 mm and 20 mm, particularly between 4 mm and 6 mm.

6. The thin-walled joint portion (32) has the minimum thickness of this thin-walled joint portion, A weighing system (10) according to any one of claims 1 to 5, characterized in that it has a thickness between 10 μm and 100 μm, particularly between 40 μm and 60 μm.

7. The weighing system (10) according to any one of claims 1 to 6, characterized in that the end region of the elastic region (34, 34') has a thickness that is rounded on both sides or inclined in the longitudinal direction.

8. The elastic region (34, 34') has a width that decreases first in the longitudinal direction, and, The weighing system (10) according to any one of claims 1 to 7, characterized in that it has a width that increases again after reaching a minimum width, which is colocalized and extends with the minimum thickness of the assigned portion.

9. The weighing system (10) according to any one of claims 1 to 8, characterized in that the elastic region (34, 34') has a length between 5 mm and 50 mm, particularly between 6 mm and 10 mm.

10. The elastic region (34, 34') is defined as the minimum thickness of this elastic region. A weighing system (10) according to any one of claims 1 to 9, characterized in that it has a thickness between 50 μm and 150 μm, particularly between 80 μm and 120 μm.

11. The weighing system (10) according to any one of claims 1 to 10, characterized in that the connected strip has a plurality of elastic regions (34').

12. The weighing system (10) according to claim 11, characterized in that the multiple elastic regions (34') are arranged in parallel to each other.

13. A lateral rotation region (39) is located in the longitudinal direction between the thin-walled joint portion (32) and the elastic region (34, 34'). This lateral rotation region consists of one or more parallel webs (392) extending in the longitudinal direction of the connecting strip-shaped body (30), each of which has a web width of one. This web width is less than the thickness of the connecting strip-shaped body (30) within this region. A weighing system (10) according to any one of the features 1 to 12.

14. The weighing system (10) according to any one of claims 1 to 13, characterized in that the length of the connecting strip-shaped body (30) is between 20 mm and 150 mm, particularly between 80 mm and 100 mm.

15. The weighing system (10) according to any one of claims 1 to 14, characterized in that the width of the connecting strip-shaped body (30) outside the functional area (32; 34, 34') and, to the extent provided, outside the lateral rotation area (39), is between 5 mm and 10 mm.

16. A connected strip-shaped body (30), wherein this connected strip-shaped body is In the above-mentioned connecting strip, which consists of a thin metal strip for connecting the load receptor (18) of the weighing system (10) and the first lever arm (241) of the lever (24) of the weighing system (10), Two functional regions, namely, are spaced apart from each other in the longitudinal direction of the thin metal strip. - In order to define a localized pivot axis (321) that extends parallel to the width direction and perpendicular to the longitudinal direction of the connecting strip-shaped body (30), In the longitudinal direction of the connecting strip-shaped body (30), the thin-walled joint portion (32) has a thickness that first decreases, and then increases again after reaching the minimum point of thickness, - In order to define a continuous group of second pivot axes (341) parallel to the first pivot axis (321), In the longitudinal direction of the connected strip-shaped body (30), firstly, the thickness decreases, After reaching the minimum thickness, it has a constant thickness over a section corresponding to at least the width of the elastic region, and Next, there is an elastic region (34, 34') which has an increasing thickness, A connected strip-shaped body (30) characterized by having a structure formed thereon.

17. The connected strip (30) according to claim 16 is characterized in that it has a plurality of elastic regions (34').

18. The connected strip-shaped body (30) according to claim 17 is characterized in that the multiple elastic regions (34') are arranged in parallel to each other.

19. - Preparation of a semi-finished product consisting of a spring-elastic thin metal sheet, - Laser processing of connected strip-shaped semi-finished products for forming length regions of different thicknesses and / or widths, A connected strip-shaped body (30) according to any one of 16 to 18, characterized in that it is manufactured by the method described above.

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