Load Cell Assemblies and Electronic Scales

Abstract

The utility model relates to the technical field of weighing equipment, and discloses a weighing sensor assembly and an electronic scale. The weighing sensor assembly comprises: a sensor body having a bearing rod; a first connecting piece, one end of which is connected to the bearing rod, the other end is an abutting portion, and the middle part is an extension portion. The weighing sensor assembly can adjust the position of the abutting portion at a low cost by changing the length of the extension portion in the first connecting piece, and provides a relatively sufficient space for users to design the overall structure of the electronic scale.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing equipment, and in particular to a weighing sensor component and an electronic scale. Background Art

[0002] In the prior art, a protruding contact is usually set on the load-bearing rod of the weighing sensor body as a component that contacts the scale foot pad to transmit pressure to the load-bearing rod, and output a changing electrical signal by deformation of the load-bearing rod to achieve weighing. However, the contact in this structural form is usually an integrated structure with the load-bearing rod, or the contact is welded on the load-bearing rod, and the distance between the lower end of the contact and the load-bearing rod is relatively close, resulting in a small space around the contact when designing the structure of the electronic scale, making it difficult to set other structures.

[0003] In addition, the main factors that affect the accuracy of electronic scales are the scale feet, sensor pairing, and their combination. In the prior art, the scale feet and sensors are mostly combined together through hard contact methods such as hot melt or screw locking. In actual use of the whole machine, if the floor is not level, the force on the scale feet will not be vertical. Correspondingly, the load-bearing rod on the sensor is not vertically stressed, which in turn affects the accuracy of the whole machine. There are also some electronic scales whose scale feet are elastically connected to the whole machine casing, and the sensor is abutted against the scale feet. If the floor is not level, the scale feet are no longer completely vertically stressed, and the whole machine casing will bear part of the pressure, resulting in a decrease in measurement accuracy. Utility Model Content

[0004] The utility model is made to solve the above technical problems, and one of its purposes is to provide a sensor component that can increase the space at the periphery of the contacts on the sensor to facilitate the arrangement of other structures.

[0005] Another object of the utility model is to provide a weighing sensor assembly, which can improve weighing accuracy in an environment where the ground is not level.

[0006] Another object of the present invention is to provide a weighing sensor assembly that can reduce the thickness of the entire device.

[0007] According to one embodiment of the utility model, a weighing sensor assembly is provided, including: a sensor body having a bearing rod; a first connecting member, one end of which is connected to the bearing rod, the other end of which is an abutment portion, and the middle portion of which is an extension portion.

[0008] As an embodiment, the lower end of the abutting portion is a curved surface.

[0009] As an embodiment, it further comprises: a decorative cover, which is sleeved on the abutting portion and has a curved lower end surface.

[0010] As an embodiment, a brim extending toward the periphery is formed at the upper end of the decorative cover.

[0011] As an embodiment, it further comprises: a balance foot body; wherein the abutting portion abuts against the balance foot body, and at least one of the two contact surfaces between the abutting portion and the balance foot body is a curved surface.

[0012] As an embodiment, a load-bearing sheet is provided on the foot body, and the abutting portion abuts against the load-bearing sheet.

[0013] As an embodiment, it also includes: a second connecting member, the upper end of which is connected to the bearing rod and the middle part of which is formed with a through hole for accommodating the extension part; an elastic member, one end of which is connected to the outer periphery of the second connecting member and the other end is connected to the foot body.

[0014] As an embodiment, a mounting hole is formed on the bearing rod, and one end of the first connecting member is a connecting portion arranged in the mounting hole.

[0015] As an embodiment, the upper end surface of the extension portion abuts against the bearing rod.

[0016] According to one embodiment of the utility model, there is provided an electronic scale, comprising: a scale plate, the lower end of which is provided with the weighing sensor assembly as described above.

[0017] According to the above description and practice, the weighing sensor assembly in the utility model is provided with a first connecting member on the bearing rod, and the abutting portion at the lower end of the first connecting member contacts other structures, for example, directly abuts against the scale foot to transmit pressure. Since the first connecting member has a simple structure and a small volume, its manufacturing cost is low. Therefore, when designing an electronic scale, the length of the extension portion in the first connecting member can be changed according to actual needs to adjust the upper and lower positions of the abutting portion, providing users with more sufficient space when designing the overall structure of the electronic scale. And in this process, there is no need to change the structure of the sensor body, which has good versatility.

[0018] In addition, after the weighing sensor assembly of the utility model sets at least one of the two contact surfaces between the first connecting member and the foot body as an arc surface, the weighing accuracy can be improved in an environment where the ground is not level.

[0019] In addition, a load-bearing sheet is provided in the weighing sensor assembly of the utility model, which can reduce the thickness of the foot body and thus reduce the thickness of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the exploded structure of the weighing sensor assembly involved in the first embodiment of the present utility model.

[0021] Figure 2It is a structural schematic diagram of a sensor body in a weighing sensor assembly involved in the first embodiment of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the first connecting member in the weighing sensor assembly involved in the first embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the exploded structure of the weighing sensor assembly involved in the second embodiment of the present utility model.

[0024] Figure 5 It is a schematic structural diagram of a decorative cover in a weighing sensor assembly involved in the second embodiment of the utility model.

[0025] Figure 6 This is a schematic diagram of the exploded structure of the weighing sensor assembly involved in the third embodiment of the present utility model.

[0026] Figure 7a and Figure 7b It is a schematic diagram of the three-dimensional structure of the second connecting member, the elastic member and the scale foot body in the weighing sensor assembly involved in the third embodiment of the present utility model at two different viewing angles.

[0027] The reference numerals in the figure are:

[0028] 1. Sensor body 11. Bearing rod

[0029] 12. Fixing structure 13. Mounting hole

[0030] 2. First connecting member 21, connecting portion

[0031] 22. Extension portion 23. Abutment portion

[0032] 24. Groove 25. Decorative cover

[0033] 26. Hat brim 31. Foot body

[0034] 32. Second connecting member 33. Elastic member

[0035] 34. Load-bearing piece 35. Clamp arm

[0036] 41. First through hole 42. Second through hole DETAILED DESCRIPTION

[0037] The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and fully convey the concepts of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0038] In addition, the accompanying drawings are only schematic diagrams of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated descriptions will be omitted. It should be noted that in the present disclosure, the terms "including", "configured with", and "set in" are used to express the meaning of open-ended inclusion, and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc.; the terms "first", "second", etc. are only used as marks, and are not restrictions on the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] In this embodiment, a weighing sensor assembly is disclosed, please refer to Figures 1 to 3 The sensor component includes a sensor body 1 and a first connecting member 2. The middle part of the sensor body 1 is a load-bearing rod 11, and the outer periphery is a fully enclosed fixed structure 12. When in use, the sensing circuit is arranged on the load-bearing rod 11, and can sense the change of the electrical signal caused by the deformation of the load-bearing rod 11. The fully enclosed fixed structure 12 surrounds the outer periphery of the load-bearing rod 11, and after being installed on other structures, the load-bearing rod 11 can be subjected to a more balanced force.

[0042] A mounting hole 13 is formed on the bearing rod 11, one end of the first connecting member 2 is a connecting portion 21 disposed in the mounting hole 13, the other end is an abutting portion 23, and the middle portion is an extending portion 22. Figure 3 As shown, the upper part of the first connecting member 2 is a connecting portion 21, which is provided with an external thread, which matches the internal thread in the mounting hole 13, and the first connecting member 2 can be fixedly mounted on the bearing rod 11. The lower end of the first connecting member 2 is an abutting portion 23, which abuts against other structures when in use, such as directly against the foot of the scale or the ground, and the pressure can be transmitted to the bearing rod 11 through the first connecting member 2 to achieve the weighing function.

[0043] In other embodiments, the first connecting member 2 and the mounting hole 13 may also be connected by clamping, riveting, welding, bonding, etc., which can also realize the connection between the first connecting member 2 and the sensor body 1. Alternatively, the first connecting member 2 is directly welded or clamped on the bearing rod 11, in which case there is no need to set the above-mentioned mounting hole 13 on the bearing rod 11, and the above-mentioned function can also be realized.

[0044] Since the first connecting member 2 has a simple structure and a small volume, its manufacturing cost is low. Therefore, when designing an electronic scale, the length of the extension portion 22 in the middle of the first connecting member 2 can be changed according to actual needs to adjust the upper and lower positions of the abutting portion 23, so that other structural members can be arranged on the periphery of the first connecting member 2. In this process, there is no need to significantly change the structure of the sensor body 1, which has good versatility.

[0045] As an implementation mode, in this embodiment, a recessed groove 24 is further provided on the abutting portion 23 , so that the user can screw the first connecting member 2 into the mounting hole 13 with a screwdriver to achieve a stable connection between the first connecting member 2 and the bearing rod 11 .

[0046] As an implementation mode, in this embodiment, the lower end of the abutting portion 23 is an arc surface, and when in use, it can also directly serve as a scale foot against the ground. At this time, if the ground is uneven, compared with the structural form in which the lower end of the abutting portion 23 is a flat surface, a large bending moment will not be generated on the first connecting member 2, and the deformation of the bearing rod 11 in the non-vertical direction can be reduced, which can improve the weighing accuracy to a certain extent.

[0047] Embodiment 2

[0048] Another weighing sensor assembly is disclosed in this embodiment, please refer to Figure 4 and Figure 5 The sensor component includes a sensor body 1 and a first connecting member 2. The middle part of the sensor body 1 is a load-bearing rod 11, and the outer periphery is a fully enclosed fixed structure 12. When in use, the sensing circuit is arranged on the load-bearing rod 11, and can sense the change of the electrical signal caused by the deformation of the load-bearing rod 11. The fully enclosed fixed structure 12 surrounds the outer periphery of the load-bearing rod 11, and after being installed on other structures, the load-bearing rod 11 can be subjected to a more balanced force.

[0049] A mounting hole 13 is formed on the bearing rod 11, one end of the first connecting member 2 is a connecting portion 21 disposed in the mounting hole 13, the other end is an abutting portion 23, and the middle portion is an extending portion 22. Figure 3 As shown, the upper part of the first connecting member 2 is a connecting portion 21, which is provided with an external thread, which matches the internal thread in the mounting hole 13, and the first connecting member 2 can be fixedly mounted on the bearing rod 11. The lower end of the first connecting member 2 is an abutting portion 23, which abuts against other structures when in use, such as directly against the foot of the scale or the ground, and the pressure can be transmitted to the bearing rod 11 through the first connecting member 2 to achieve the weighing function.

[0050] In other embodiments, the first connecting member 2 and the mounting hole 13 may also be connected by clamping, riveting, welding, bonding, etc., which can also realize the connection between the first connecting member 2 and the sensor body 1. Alternatively, the first connecting member 2 is directly welded or clamped on the bearing rod 11, in which case there is no need to set the above-mentioned mounting hole 13 on the bearing rod 11, and the above-mentioned function can also be realized.

[0051] Since the first connecting member 2 has a simple structure and a small volume, its manufacturing cost is low. Therefore, when designing an electronic scale, the length of the extension portion 22 in the middle of the first connecting member 2 can be changed according to actual needs to adjust the upper and lower positions of the abutting portion 23, so that other structural members can be arranged on the periphery of the first connecting member 2. In this process, there is no need to significantly change the structure of the sensor body 1, which has good versatility.

[0052] As an implementation mode, in this embodiment, a decorative cover 25 is sleeved on the abutting portion 23, and the lower end of the decorative cover 25 is an arc surface. When in use, it can also be directly used as a scale foot against the ground. At this time, if the ground is uneven, compared with a flat surface against the ground, no large bending moment will be generated on the first connecting member 2, which can reduce the deformation of the load-bearing rod 11 along the non-vertical direction, and can improve the weighing accuracy to a certain extent. The location where the decorative cover 25 is set is an exposed part on the entire electronic scale. This split structure makes it convenient for users to change the color, surface texture and other appearance structures of the decorative cover 25 according to actual needs to adapt to the appearance of the entire machine.

[0053] Further, as an embodiment, a brim 26 extending toward the periphery is formed at the upper end of the decorative cover 25. After the weighing sensor assembly is installed on the electronic scale, for example, the main body of the decorative cover 25 is in a mounting hole on the housing of the whole machine, and the brim 26 is against the periphery of the inner side of the mounting hole, which can not only shield the internal structure of the whole machine, but also prevent the decorative cover 25 from falling off.

[0054] Embodiment 3

[0055] Another weighing sensor assembly is disclosed in this embodiment, please refer to Figure 6, Figure 7a and Figure 7b The sensor component includes a sensor body 1 and a first connecting member 2. The middle part of the sensor body 1 is a load-bearing rod 11, and the outer periphery is a fully enclosed fixed structure 12. When in use, the sensing circuit is arranged on the load-bearing rod 11, and can sense the change of the electrical signal caused by the deformation of the load-bearing rod 11. The fully enclosed fixed structure 12 surrounds the outer periphery of the load-bearing rod 11, and after being installed on other structures, the load-bearing rod 11 can be subjected to a more balanced force.

[0056] A mounting hole 13 is formed on the bearing rod 11, one end of the first connecting member 2 is a connecting portion 21 disposed in the mounting hole 13, the other end is an abutting portion 23, and the middle portion is an extending portion 22. Figure 3 As shown, the upper part of the first connecting member 2 is a connecting portion 21, which is provided with an external thread, which matches the internal thread in the mounting hole 13, and the first connecting member 2 can be fixedly mounted on the bearing rod 11. The lower end of the first connecting member 2 is an abutting portion 23, which abuts against other structures when in use, such as directly against the foot of the scale or the ground, and the pressure can be transmitted to the bearing rod 11 through the first connecting member 2 to achieve the weighing function.

[0057] In other embodiments, the first connecting member 2 and the mounting hole 13 may also be connected by clamping, riveting, welding, bonding, etc., which can also realize the connection between the first connecting member 2 and the sensor body 1. Alternatively, the first connecting member 2 is directly welded or clamped on the bearing rod 11, in which case there is no need to set the above-mentioned mounting hole 13 on the bearing rod 11, and the above-mentioned function can also be realized.

[0058] Since the first connecting member 2 has a simple structure and a small volume, its manufacturing cost is low. Therefore, when designing an electronic scale, the length of the extension portion 22 in the middle of the first connecting member 2 can be changed according to actual needs to adjust the upper and lower positions of the abutting portion 23, so that other structural members can be arranged on the periphery of the first connecting member 2. In this process, there is no need to significantly change the structure of the sensor body 1, which has good versatility.

[0059] As an embodiment, the weighing sensor assembly further includes a foot body 31, which is directly placed on the ground when in use, and the abutting portion 23 of the first connecting member 2 abuts against the foot body 31, and at least one of the two contact surfaces of the abutting portion 23 and the foot body 31 is an arc surface. In this structural form, the two form a point contact. Figure 6 As shown, in this embodiment, the lower end of the abutting portion 23 is arc-shaped and abuts against a plane on the foot body 31. In other embodiments, an arc surface opposite to the abutting portion 23 can also be provided on the foot body 31, and correspondingly, the lower end of the abutting portion 23 is set as a plane, which can also achieve the above-mentioned point contact effect.

[0060] By adopting this point contact form, when the scale foot body 31 is placed on an uneven ground and is subjected to non-vertical force, if the scale foot body 31 does not tilt, the first connecting member 2 and the load-bearing rod 11 still bear the vertical pressure, and will not affect the weighing accuracy; if the scale foot body 31 tilts to a certain extent, compared with the structural form in which the scale foot and the sensor are combined together by hard contact such as hot melting or locking screws, the first connecting member 2 in the utility model will not produce obvious bending moment, nor will it tilt to the same extent as the scale foot body 31, which can reduce the deformation of the load-bearing rod 11 along the non-vertical direction and can also improve the weighing accuracy to a certain extent.

[0061] As an embodiment, the weighing sensor assembly further includes a second connecting member 32 and an elastic member 33. Figure 6 As shown, the upper end of the second connecting member 32 is connected to the bearing rod 11, and a first through hole 41 for accommodating the extension portion 22 is formed in the middle. One end of the elastic member 33 is connected to the outer periphery of the second connecting member 32, and the other end of the elastic member 33 is connected to the foot body 31. The lower end of the first connecting member 2 passes through the second connecting member 32 and abuts against the foot body 31. It is constrained by the second connecting member 32 in the horizontal direction and by the foot body 31 in the vertical direction. In use, when the ground is uneven, even if the foot body 31 is tilted, the first connecting member 2 can be placed in a vertical or nearly vertical state with the help of the elastic member 33, and finally the force on the bearing rod 11 is closer to the vertical direction, which can further improve the measurement accuracy.

[0062] Please combine Figure 7a and Figure 7b The second connecting member 32 is a cylindrical structure sleeved on the outer periphery of the extension part 22, and a plurality of curved elastic members 33 are evenly arranged on its outer periphery. A second through hole 42 for accommodating the elastic member 33 and the second connecting member 32 is formed in the middle of the foot body 31, and the outer end of the elastic member 33 is fixedly connected to the inner wall of the second through hole 42. This structural form can arrange most of the structures of the first connecting member 2, the second connecting member 32 and the elastic member 33 in the middle part of the foot body 31. For the entire weighing sensor assembly, while achieving the above-mentioned function of improving weighing accuracy, the vertical size will not be significantly increased. The elastic member 33 with a curved structure can obtain greater elasticity in a smaller space, and does not require the foot body 31 to be set with a larger size in the radial direction.

[0063] Further, as an embodiment, a load-bearing sheet 34 is fixedly provided in the second through hole 42 in the middle of the foot body 31, for example, the load-bearing sheet 34 is bonded in the second through hole 42. By providing the load-bearing sheet 34, the vertical rigidity of the foot body 31 can be improved, and it is not easy to deform in the vertical direction during weighing measurement, and the weighing accuracy can be improved to a certain extent. Moreover, in order to achieve the required rigidity, compared with the foot body 31 without the load-bearing sheet 34, the foot body 31 in the present invention can significantly reduce the vertical thickness. In addition, the foot body 31 can also be directly set as a metal part or plastic part that is not easy to deform, which can also reduce the thickness to a certain extent.

[0064] As an embodiment, a clamping arm 35 is formed at the upper end of the second connecting member 32. After being aligned with the lower end of the load-bearing rod 11, the second connecting member 32 is moved upward, and the clamping arm 35 can be clamped on the load-bearing rod 11, which can indirectly prevent the scale foot body 31 from rotating greatly, and has a certain limiting effect on the scale foot body 31. Compared with the scale foot body 31 fixedly installed on the housing or other structures of the electronic scale, the scale foot body 31 in the present invention is indirectly connected to the load-bearing rod 11, and there is freedom of movement between the two, which can form a certain limiting effect on the scale foot body 31 without affecting the weighing accuracy.

[0065] As an embodiment, the diameter of the extension part 22 on the first connecting member 2 is larger than the inner diameter of the mounting hole 13, and the upper end surface of the extension part 22 abuts against the lower end surface of the load-bearing rod 11. During weighing measurement, after the first connecting member 2 is compressed, the upper end of the extension part 22 abuts against the load-bearing rod 11, which can improve the connection stability between the first connecting member 2 and the load-bearing rod 11, avoid looseness between the two, and enable the weighing sensor assembly to maintain a high weighing accuracy.

[0066] Embodiment 4

[0067] In this embodiment, an electronic scale is disclosed, which includes a scale plate for users to place items to be weighed. A weighing sensor assembly as described in any one of the above embodiments 1 to 3 is provided at the lower end of the scale plate.

[0068] Specifically, the number of weighing sensor assemblies on the scale plate can be adjusted according to actual needs. For example, when the electronic scale is small, only one weighing sensor assembly can be set in the center. When the volume of the electronic scale gradually increases, two or more weighing sensor assemblies can be set. For another example, on an electronic scale used to measure body weight, four weighing sensor assemblies are evenly set, which can measure body weight more accurately.

[0069] Furthermore, a through hole is provided at the lower end of the scale plate for exposing the foot body 31, and the fixing structure 12 in the sensor component is fixedly mounted on the scale plate. During use, even if the scale plate or the housing of the electronic scale is deformed, generating a non-vertical force on part of the foot body 31, the special structure of the weighing sensor assembly can reduce the impact on the first connecting member 2 and the bearing rod 11, thereby ensuring that the electronic scale has better weighing accuracy.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A weighing sensor assembly, characterized in that: include: A sensor body having a bearing rod; The first connecting member has one end connected to the bearing rod, the other end is an abutment portion, and the middle portion is an extension portion.

2. The weighing sensor assembly according to claim 1, characterized in that: The lower end of the abutting portion is a curved surface.

3. The weighing sensor assembly according to claim 1, characterized in that: Also includes: The decorative cover is sleeved on the abutting portion, and the lower end surface is a curved surface.

4. The weighing sensor assembly according to claim 3, characterized in that: The upper end of the decorative cover is formed with a brim extending toward the periphery.

5. The weighing sensor assembly according to claim 1, characterized in that: Also includes: Scale body; The abutting portion abuts against the foot body, and at least one of two contact surfaces between the abutting portion and the foot body is a curved surface.

6. The weighing sensor assembly according to claim 5, characterized in that: A load-bearing sheet is provided on the foot body, and the abutting portion abuts against the load-bearing sheet.

7. The weighing sensor assembly according to claim 5, characterized in that: Also includes: A second connecting member, the upper end of which is connected to the bearing rod, and the middle of which is formed with a through hole for accommodating the extension part; An elastic member has one end connected to the outer periphery of the second connecting member and the other end connected to the foot body.

8. The weighing sensor assembly according to any one of claims 1 to 7, characterized in that: A mounting hole is formed on the bearing rod, and one end of the first connecting member is a connecting portion arranged in the mounting hole.

9. The weighing sensor assembly according to claim 8, characterized in that: The upper end surface of the extension portion abuts against the bearing rod.

10. An electronic scale, characterized in that: include: A weighing plate, the lower end of which is provided with a weighing sensor assembly as described in any one of claims 1 to 9.

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