Connection structure of pressure sensor and kitchen scale

Abstract

The utility model relates to pressure sensor technical field, specifically, relate to a kind of connecting structure of pressure sensor, it includes pressure sensor support, including support body and by the first, second end face respectively extended out of ball head portion and at least one pressure sensor connecting portion of support body, ball head portion is geometric spheroid appearance;Connecting piece, including connecting piece body and by the third end face extended out of ball head connecting portion of connecting piece body, ball head portion is set in ball head connecting portion, and ball head connecting portion and ball head portion between having gap.The utility model further provides a kitchen scale.By setting ball head portion set in ball head connecting portion, realize the contact of ball head portion and ball head connecting portion carry out point and surface, greatly reduce horizontal component, greatly reduce the adverse effect on output data while not increase the volume of scale body, do not affect the overall aesthetic property of scale body.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, specifically to a connection structure for a pressure sensor and a kitchen scale. Background Technology

[0002] The working principle of a pressure sensor is that when the cantilever beam of the pressure sensor is subjected to a vertical force, it undergoes a slight elastic deformation, causing a change in the resistance value of a strain gauge attached to the cantilever beam. A signal processing circuit connected to the pressure sensor converts this change in strain gauge resistance into an electrical signal, which is then amplified, filtered, and processed to output accurate data proportional to the weight of the object.

[0003] Currently, beam-avoidance mounting is commonly used for pressure sensor installation. The core purpose of this method is to ensure that the pressure sensor can bear force vertically. By accurately measuring the vertical pressure exerted by an object on the sensor surface, the weight of the object can be calculated. In existing pressure sensor structural designs, to achieve uniform weight distribution and avoid localized stress concentration, the pressure sensor's load-bearing position is typically designed as a flat contact surface. Taking a common kitchen scale as an example, the contact area between the pressure sensor and the scale surface is a flat plane. When an object is placed on the scale, the pressure is evenly transmitted to the sensor through this plane, ensuring relative measurement accuracy.

[0004] However, existing commonly used structures lack effective correction mechanisms when dealing with uneven force on pressure sensors. In actual use, due to improper object placement or impacts to the scale body, pressure sensors are easily subjected to uneven forces, which existing structures cannot correct for, leading to measurement deviations. Furthermore, existing structures are susceptible to product deformation. When the scale surface deforms under stress, this force is transmitted to the sensor, interfering with the accurate measurement of vertical pressure and resulting in inaccurate output data. Currently, the pressure sensor bracket has been optimized to address these two issues. Specifically, to avoid the influence of deformation and stress on the pressure sensor, the common practice is to expose the pressure sensor bracket outside the scale body, placing it in contact with the ground or platform. This design not only affects the overall aesthetics of the scale body but also increases its size and space occupation, while reducing its sealing and protective performance.

[0005] Therefore, there is an urgent need for a connection structure for a pressure sensor and a kitchen scale that can reduce the adverse effects of uneven force and deformation of the scale surface on the output data without increasing the size of the scale body or affecting its overall aesthetics. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a connection structure for a pressure sensor, comprising: A pressure sensor bracket includes a bracket body, a ball head extending from a first end face and a second end face corresponding to the bracket body, and at least one pressure sensor connection portion, wherein the ball head is in the shape of a geometric sphere. A connector includes a connector body and a ball-head connector extending from a third end face of the connector body, wherein the ball head is fitted inside the ball-head connector and there is a gap between the ball-head connector and the ball head.

[0007] According to one embodiment of the present invention, the ball head connecting portion has a first groove in the shape of a geometric sphere, the diameter of the first groove being larger than the diameter of the ball head.

[0008] According to one embodiment of the present invention, the ball joint connection part comprises a first engaging part, a second engaging part, and a top plate. The first engaging part and the second engaging part are both arc-shaped irregular plates. The first engaging part and the second engaging part are arranged at intervals and combined into a tubular shape. The top plate is disposed at the end of the first engaging part and the second engaging part near the third end face. A second groove is formed between the top plate, the first engaging part, and the second engaging part.

[0009] According to one embodiment of the present invention, a conical cylindrical connecting part is further provided between the support body and the ball head, and the two ends of the conical cylindrical connecting part are fixedly connected to the support body and the ball head respectively.

[0010] According to one embodiment of the present invention, the conical connecting part is a hollow structure, the spherical head is a hollow structure, and the conical cylindrical connecting part extends to the hollow space of the spherical head and abuts against or fixes to the concave surface of the spherical head.

[0011] According to one embodiment of the present invention, the diameter of the groove is 0.1 mm larger than the diameter of the ball head.

[0012] According to one embodiment of the present invention, the ball head connecting portion has an opening, which is smaller than the ball head.

[0013] According to one embodiment of the present invention, when the ball head connecting part contacts the highest point of the ball head, the connecting body and the bracket body are parallel to each other.

[0014] According to one embodiment of the present invention, two sensor connection parts are provided, respectively located at both ends of the bracket body, and the ball head is located in the middle of the bracket body. The central axis of the conical cylindrical connection part is perpendicular to the bracket body and passes through the center of the ball head.

[0015] This utility model also provides a kitchen scale, comprising: a pressure sensor bracket, the pressure sensor bracket including a bracket body and a ball head extending from a first end face and a second end face corresponding to the bracket body, and at least one pressure sensor connecting portion, the ball head being in the shape of a geometric sphere; a connector, the connector including a connector body and a ball head connecting portion extending from a third end face of the connector body, the ball head connecting portion including a groove, the ball head being fitted into the groove, and a gap being formed between the groove and the ball head; and further comprising a weighing platform, a sensor, a bottom shell, and foot pads, the weighing platform, the connector, the pressure sensor bracket, the pressure sensor, the bottom shell, and the foot pads being connected in sequence.

[0016] In this invention, when the pressure sensor's connection structure receives uneven and lateral forces from the connector, the ball head's contact with the groove is always a point and surface contact. This allows the ball head to decompose these complex forces into vertical and horizontal components. The horizontal component is significantly reduced, while the vertical component is accurately transmitted to the sensor's cantilever beam through the contact surface between the ball head and the sensor support. This reduces the adverse effects of uneven forces and deformation of the weighing surface on the output data without increasing the scale's volume or affecting its overall aesthetics. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a perspective view of the pressure sensor bracket in the connection structure of the pressure sensor in the embodiment; Figure 2 This is a perspective view of the pressure sensor in the kitchen scale in the embodiment; Figure 3 This is a cross-sectional view of the pressure sensor bracket and connector in the kitchen scale in the embodiment. Figure 4 This is an enlarged cross-sectional view of the pressure sensor bracket and connector in the kitchen scale at point A in the embodiment. Figure 5 This is a perspective view of the connector in the connection structure of the pressure sensor in the embodiment; Figure 6 This is an enlarged cross-sectional view of the pressure sensor bracket and connector in the kitchen scale at point B in the embodiment. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0020] Example 1 Please see Figure 1 , 2 3 and 4 Figure 1 This is a perspective view of the pressure sensor bracket in the connection structure of the pressure sensor in the embodiment; Figure 2 This is a perspective view of the pressure sensor in the kitchen scale in the embodiment; Figure 3 This is a cross-sectional view of the pressure sensor bracket and connector in the kitchen scale in the embodiment. Figure 4 This is an enlarged cross-sectional view of the pressure sensor bracket and connector in the kitchen scale at point A in the embodiment.

[0021] This embodiment provides a connection structure for a pressure sensor, comprising: a pressure sensor bracket 30, including a bracket body 33 and a ball head 31 extending from a first end face 72 and a second end face 73 corresponding to the bracket body 33, and at least one pressure sensor connection portion 34, wherein the ball head 31 is in the shape of a geometric sphere; and a connector 20, including a connector body 21 and a ball head connection portion 200 extending from a third end face 74 of the connector body 21, wherein the ball head 31 is fitted inside the ball head connection portion 200, and there is a gap between the ball head connection portion 200 and the ball head 31.

[0022] Let's look at it in more detail. Figure 4In this embodiment, the first groove 201 in the ball-head connector 200 is also geometrically spherical, and the diameter of the first groove 201 is larger than the diameter of the ball head 31. The opening of the first groove 201 is slightly smaller than the diameter of the ball head 31. That is, the ball head 31 can be accommodated in the first groove 201 by pressing the opening of the first groove 201. Since the ball head 31, the bracket body 33, and the pressure sensor connector 34 are integrally formed or fixedly connected, the connector 20 can move slightly relative to the ball head 31 through the first groove 201 under force. Moreover, during the micro-rotation of the ball-head connector 200, the first groove 201 only contacts one point on the ball head 31. The ball head 31 has a smooth surface and precise dimensional tolerances. When the weighing platform 10 deforms under stress, the resulting stress and lateral force are transmitted to the ball head 31 through the connector 20. The ball head 31 can automatically adjust according to the direction of the force. Specifically, when the weighing platform 10 deforms under stress, the ball head connector 200 will rotate slightly by a small angle, and the non-highest point of the ball head 31 will contact the ball head connector 200. At this time, the contact is still a point-to-surface contact. The first groove 201 of the ball head connector 200 transmits the uneven force and lateral force to the ball head 31 through point contact. The ball head 31 converts these forces into relatively uniform horizontal and vertical components. The horizontal component is greatly reduced compared to the case of surface-to-surface contact, thereby ensuring that the force can be transmitted vertically to the sensor 40.

[0023] In this embodiment, the connector body 21 is planar, corresponding to the fourth end face of the ball head connector 200. The fourth end face 71 corresponds to the aforementioned third end face 74. When the first groove 201 contacts the highest point of the ball head 31, the connector body 21 and the support body 33 are parallel to each other. For example, the connector body 21 can be a cube, cuboid, or cylindrical plate. Two sensor connectors 34 are provided, respectively located at the two ends of the support body 33. The ball head 31 is located in the middle of the support body 33. A conical cylindrical connector 32 is also provided between the support body 33 and the ball head 31, with both ends of the conical connector 32 fixedly connected to the support body 33 and the ball head 31, respectively. In this embodiment, the support body 33, the conical connector 32, and the ball head 31 are sequentially connected and integrally formed. Other fixed connections are also possible between the support body 33, the conical connector 32, and the ball head 31. The conical connecting part 32 is a hollow structure, and the spherical head 31 is a hollow structure. The conical cylindrical connecting part 32 extends into the hollow space of the spherical head 31 near the side of the spherical head 31 and abuts against or fixes to the concave surface of the spherical head 31. That is, the conical cylindrical connecting part 32 passes through one side surface of the spherical head 31 and enters the hollow space of the spherical head 31, and continues to extend until it abuts against the inner end face of the other side surface of the spherical head 31. The central axis of the conical cylindrical connecting part 32 is perpendicular to the support body 33 and passes through the center of the spherical head 31. This symmetrical and centrally located design, coupled with the parallelism between the connecting body 21 and the support body 33, makes the force transmission more accurate. Thus, the force after being decomposed by the spherical head 31 can be stably and accurately transmitted to the sensor 40 through the conical connecting part 32. The conical connecting part 32 is a hollow structure, and the spherical head 31 is a hollow structure. Figure 1 As shown, one end of the conical connecting part 32 has a through hole 36. This saves material costs. The diameter of the first groove 201 is 0.1 mm larger than the diameter of the ball head 31. While maintaining the connection between the first groove 201 and the ball head 31 without loosening, it also ensures that the contact between the ball head 31 and the first groove 201 is a point and surface contact, which greatly reduces the force in the horizontal direction.

[0024] When the first groove 201 contacts the highest point of the ball head 31, the third end face 74, the fourth end face 71, the first end face 72, and the second end face 73 are parallel to each other. In this embodiment, when the kitchen scale is placed flat, the first groove contacts the highest point of the ball head 31, and the third end face 74, the fourth end face 71, the first end face 72, and the second end face 73 are all parallel to the horizontal plane. That is to say, this is the optimal state for weighing, and the force is more inclined to be applied in the vertical direction.

[0025] Example 2 In this embodiment, specifically, see Figure 5 and Figure 6 , Figure 5This is a perspective view of the connector in the connection structure of the pressure sensor in the embodiment; Figure 6 This is an enlarged cross-sectional view of the pressure sensor bracket and connector in the kitchen scale at point B in the embodiment. Points A and B are actually two implementations of the same structure of the kitchen scale, and multiple implementations can be used individually or mixed in one kitchen scale 1. Embodiment 1 and Embodiment 2 differ only in the structure of the ball-head connector 200. The ball-head connector 200 consists of a first engaging part 24, a second engaging part 23, and a top plate 25. Both the first engaging part 24 and the second engaging part 23 are arc-shaped irregular plates with an arc-shaped cross-section. The openings of the first engaging part 24 and the second engaging part 23 correspond and are spaced apart, thus enclosing a tubular space. See details... Figure 2 The openings of the first engaging portion 24 and the second engaging portion 23 are correspondingly disposed and vertically fixed or integrally formed on the connector body 21. The first engaging portion 24 and the second engaging portion 23 have guide arc segments 26 at their ends away from the connector body 21 for initial positioning of the ball head 31. An engaging opening 27 is formed on the side of the guide arc segment 26 near the connector body 21, which is used to engage the ball head 31. Specifically, when the ball head 31 is pressed forcefully into the engaging opening 27, the first engaging portion 24 and the second engaging portion 23 deform to both sides, making the engaging opening 27 larger, allowing the ball head 31 to enter the second groove. After entering, since the second groove is larger than the ball head 31, the first engaging portion 24 and the second engaging portion 23 return to their original shape to engage and connect the ball head 31 after it has entered the groove. A top plate 25 is disposed on one side of the tubular space, and the top plate 25 and the tubular space together enclose the second groove. The opening of the second groove is smaller than the ball head 31. Since both the first engaging portion 24 and the second engaging portion 23 have a certain degree of elasticity, the ball head 31 can be pressed into the second groove by squeezing through the engaging opening 27.

[0026] Example 3 This utility model also provides a kitchen scale 1, including: a weighing platform 10, a pressure sensor connection structure, a sensor 40, a base shell 50, and foot pads 60; wherein the pressure sensor connection structure is the same as in Embodiment 1 or 2, and will not be described again here. The weighing platform 10, connector 20, pressure sensor bracket 30, pressure sensor 40, base shell 50, and foot pads 60 are connected in sequence. Specifically, the weighing platform 10 is mounted on the connector body 21 and is fitted to the fourth end face 71. The ball head 31 is sleeved in the ball head connection part 200. The pressure sensor connection part 34 is detachably connected to the cantilever beam 41 of the pressure sensor 40. The pressure sensor 40 is mounted on the base shell 50, and the base shell 50 is mounted on the foot pads 60.

[0027] To facilitate understanding, the usage process of the kitchen scale and the working status and principle of each component during this process are explained in detail: When using this product, place the kitchen scale flat on a plane, ensuring that the foot pads 60 and the base shell 50 are both flat, and that the third end face 74, fourth end face 71, first end face 72, second end face 73, weighing platform 10, foot pads 60, and base shell 50 are all parallel to each other. When an object is placed on the weighing platform 10, the weighing platform 10 bears the weight of the object and begins to deform under stress. The force generated by the deformation of the weighing platform 10 is transmitted to the ball head 31 through the ball head connection part 200 of the connector 20. Due to the gap between the ball head connection part 200 and the ball head 31, when the force transmitted by the weighing platform 10 to the connector 20 is uneven, the ball head connection part 200 of the connector 20 will move slightly relative to the ball head 31. During this movement, the non-highest point in the ball head 31 connects with the ball head connection part 200. This allows the ball head 31 to correct for uneven forces and lateral forces from the connector 20. Specifically, the ball head 31 decomposes these complex forces into vertical and horizontal components. Since the ball head 31 and the ball head connector have point and surface contact, the horizontal force is greatly reduced, while the vertical component is accurately transmitted to the cantilever beam 41 of the sensor 40 through the contact surface between the ball head 31 and the sensor bracket 34.

[0028] The pressure sensor connection part 34 is detachably connected to the cantilever beam 41 of the pressure sensor 40, and the pressure sensor 40 is connected to the base shell 50, so the ball head 31 is fixed and cannot rotate. In this embodiment, the connector 20 is connected to the weighing platform 10 through the connection hole 22.

[0029] When the cantilever beam 41 of sensor 40 is subjected to a vertical force, it undergoes a slight elastic deformation, causing a change in the resistance value of the strain gauge 42 attached to the cantilever beam. The signal processing circuit connected to sensor 40 converts this change in resistance value into an electrical signal, which, after amplification and filtering, outputs accurate data proportional to the weight of the object. Throughout the process, the ball head 31 and the ball head connection 200 remain in point and surface contact, effectively preventing the stress and lateral forces generated by the deformation of the weighing platform 10 from affecting the measurement accuracy of sensor 40, thus ensuring the accuracy and reliability of the strain gauge 42's output data.

[0030] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A connection structure for a pressure sensor, characterized in that, include: A pressure sensor bracket includes a bracket body, a ball head extending from a first end face and a second end face corresponding to the bracket body, and at least one pressure sensor connection portion, wherein the ball head is in the shape of a geometric sphere. A connector includes a connector body and a ball-head connector extending from a third end face of the connector body, wherein the ball head is fitted inside the ball-head connector and there is a gap between the ball-head connector and the ball head.

2. The connection structure of the pressure sensor according to claim 1, characterized in that, The ball-head connector has a first groove in the shape of a geometric sphere, the diameter of which is larger than the diameter of the ball head.

3. The connection structure of the pressure sensor according to claim 1, characterized in that, The ball joint connection includes a first engaging part, a second engaging part, and a top plate. The first engaging part and the second engaging part are both arc-shaped irregular plates. The first engaging part and the second engaging part are arranged at intervals and combined into a tubular shape. The top plate is disposed at the end of the first engaging part and the second engaging part near the third end face. A second groove is formed between the top plate, the first engaging part, and the second engaging part.

4. The connection structure of the pressure sensor according to claim 1, characterized in that, A conical cylindrical connecting part is also provided between the support body and the ball head, and the two ends of the conical cylindrical connecting part are fixedly connected to the support body and the ball head respectively.

5. The connection structure of the pressure sensor according to claim 4, characterized in that, The conical cylindrical connecting part is a hollow structure, the spherical head is a hollow structure, and the conical cylindrical connecting part extends into the hollow space of the spherical head and abuts against or fixes to the concave surface of the spherical head.

6. The connection structure of the pressure sensor according to claim 2, characterized in that, The diameter of the groove is 0.1 mm larger than the diameter of the ball head.

7. The connection structure of the pressure sensor according to claim 3, characterized in that, The ball head connection portion has an opening, which is smaller than the ball head.

8. The connection structure of the pressure sensor according to claim 1, characterized in that, When the ball head connector contacts the highest point of the ball head, the connector body and the bracket body are parallel to each other.

9. The connection structure of the pressure sensor according to claim 4, characterized in that, Two sensor connection parts are provided, respectively located at both ends of the bracket body. The ball head is located in the middle of the bracket body. The central axis of the conical cylindrical connection part is perpendicular to the bracket body and passes through the center of the ball head.

10. A kitchen scale, characterized in that, The device includes a weighing platform, a sensor, a base, foot pads, and a connection structure for a pressure sensor according to any one of claims 1 to 9, wherein the weighing platform, the connector, the pressure sensor bracket, the pressure sensor, the base, and the foot pads are connected in sequence.

Images