Electronic scales

Abstract

The present invention discloses an electronic scale, comprising an electronic scale body, a main control device, at least three level adjustment modules, at least three infrared distance sensors and at least three weighing sensors. The level adjustment module comprises an air pump electrically connected to the main control device and a level adjustment component connected to the air pump, and is used to adjust the level of the electronic scale body; the infrared distance sensor is used to detect the height of the level adjustment component. When in use, the infrared distance sensor can quickly measure the actual height of each level adjustment component, and the main control device adjusts the telescopic length of the level adjustment component according to the difference between the actual height of each level adjustment component and its factory default value so that the weighing sensors are all located in the same horizontal plane, eliminating the error caused by the uneven placement surface, thereby improving the measurement accuracy; by using air pressure to push the level adjustment component up and down, it can not only achieve efficient automatic leveling, but also adjust a small height, so that the level accuracy is higher, and thus the measurement accuracy is higher.

Description

Technical Field

[0001] The invention relates to the technical field of weighing, in particular to an electronic scale. Background Art

[0002] Electronic scales are increasingly used in our daily lives. However, in some usage scenarios, the placement surface of the electronic scale may not be completely horizontal. For example, some cement or tile countertops have pits of varying depths on the surface. If the weighing platform feet are placed in the pits, the weighing platform cannot be placed flat. The horizontal placement of the electronic scale will affect the weighing results, especially for high-precision measurements. If the electronic scale is not placed horizontally, it will have a great impact on the measurement results.

[0003] The common method of adjusting the horizontality of an electronic scale is to provide threaded adjustment feet for adjusting the horizontal position on the four corners of the electronic scale. By observing the horizontal bubble meter on the electronic scale, if the electronic scale is not in a horizontal position, it is necessary to adjust the threaded adjustment feet on the four corners to make the electronic scale in a horizontal position, so as to achieve the accuracy of weighing. At present, the height of the threaded adjustment feet can be adjusted manually or automatically by motor drive. If the electronic scale is in a fixed position for a long time or rarely moves, it is completely possible to use this manual adjustment method, but in actual use, the electronic scale often needs to be moved frequently, and manual adjustment is required every time it is moved, which greatly affects the efficiency and brings inconvenience to use. Although the method of adjusting the feet by motor drive is much more convenient to use, the height of the thread adjustment is stepped, and the small height cannot be adjusted, resulting in low horizontal accuracy, which leads to low measurement accuracy. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an electronic scale that can automatically adjust the level and improve the measurement accuracy.

[0005] An electronic scale according to an embodiment of the present invention comprises an electronic scale body, a main control device, at least three level adjustment modules, at least three infrared distance sensors and at least three weighing sensors, wherein the main control device is located in the electronic scale body; at least three level adjustment modules are used to adjust the level of the electronic scale body, and at least three level adjustment modules are arranged in a plane, and the level adjustment module comprises an air pump electrically connected to the main control device and a level adjustment component connected to the air pump, wherein the air pump and the level adjustment module are installed in the electronic scale body, and one end of the level adjustment component extends outside the electronic scale body; at least three weighing sensors are respectively arranged on the corresponding level adjustment components, and the weighing sensors are electrically connected to the main control device, and are used to obtain weighing data and transmit weighing information to the main control device; at least three infrared distance sensors are respectively arranged on the electronic scale body corresponding to one side of the level adjustment module, and the infrared distance sensors are electrically connected to the main control device, and the infrared distance sensors comprise a transmitting part and a receiving part, and are used to detect the height of the corresponding infrared distance sensor relative to the placement surface and transmit the height information to the main control device.

[0006] The electronic scale according to the embodiment of the present invention has at least the following beneficial effects: the electronic scale is supported by the horizontal adjustment components in at least three horizontal adjustment modules at the bottom thereof; when in use, the infrared distance sensor can quickly measure the actual height of each infrared distance sensor, and feed back the measured height information to the main control device; the main control device calculates the difference between the actual height of each infrared distance sensor and its factory default value, and adjusts the telescopic length of the corresponding horizontal adjustment component according to the difference so that the weighing sensors are all located in the same horizontal plane, then the electronic scale is in a horizontal state, the error caused by the uneven placement surface is eliminated, thereby improving the measurement accuracy; at the same time, the telescopic length of the corresponding horizontal adjustment component is adjusted according to the difference, then it is possible to determine whether the electronic scale is in a horizontal state without the aid of a horizontal detection device, thus avoiding the need for the user to observe the horizontal detection device to determine the horizontal state of the electronic scale, making the operation simpler and improving the user experience satisfaction. The horizontal adjustment component is connected to the air pump through an air pipe, that is, the horizontal adjustment component is driven by the air pump and its telescopic length is controlled. Such pneumatic leveling method is simple to operate and easy to control. Moreover, since air pressure is used to promote lifting and lowering, it can achieve efficient automatic leveling without step-by-step lifting and lowering. Even tiny heights can be adjusted, so the horizontal accuracy is higher, and thus the measurement accuracy is higher.

[0007] According to some embodiments of the present invention, the horizontal adjustment assembly includes an air chamber body and an adjustment foot, the air chamber body is fixed in the electronic scale body, the air chamber body has a cavity with an opening facing downward, one end of the adjustment foot extends out of the air chamber body through the opening, the other end of the adjustment foot is slidably connected to the inner wall of the air chamber body to form an air chamber, and the air chamber is connected to the air pump.

[0008] According to some embodiments of the present invention, the horizontal adjustment assembly further includes a spring, which is located in the air chamber body, has one end abutting or connected to the adjustment foot, and has the other end abutting or connected to the air chamber body.

[0009] According to some embodiments of the present invention, the level adjustment assembly further includes a sealing ring, wherein the sealing ring is located between the adjustment foot and the air chamber body.

[0010] According to some embodiments of the present invention, the horizontal adjustment assembly further includes a supporting iron sheet, a bottom surface of which is in contact with a top surface of the air chamber body.

[0011] According to some embodiments of the present invention, the electronic scale further comprises a level indicator device electrically connected to the main control device, for displaying the levelness of the electronic scale body, wherein the level indicator device is located on the electronic scale body.

[0012] According to some embodiments of the present invention, the level indicator device includes a horizontal level indicator bar and a vertical level indicator bar, each of which has at least three LED indicators spaced apart along their axial direction, one of which is located in the center.

[0013] According to some embodiments of the present invention, the horizontal level indicator bar and the vertical level indicator bar are combined to form a cross shape, and the LED indicator at the center of the horizontal level indicator bar coincides with the LED indicator at the center of the vertical level indicator bar.

[0014] According to some embodiments of the present invention, the cross is located in the center of the scale surface.

[0015] According to some embodiments of the present invention, the bottom of the electronic scale body has at least three through holes, and the infrared distance sensors are correspondingly arranged in the through holes.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 a is a schematic top view of an electronic scale according to an embodiment of the present invention;

[0019] Figure 1 b is Figure 1 a BB section diagram;

[0020] Figure 1 c is Figure 1 a is a cross-sectional view in CC direction;

[0021] Figure 1 d is Figure 1 a DD section diagram;

[0022] Figure 2 a is Figure 1 A bottom view schematic diagram of the electronic scale shown in ;

[0023] Figure 2 b is Figure 2 a sectional view in AA direction;

[0024] Figure 3 yes Figure 1 An exploded diagram of an electronic scale shown in ;

[0025] Figure 4 yes Figure 3 An exploded view of the adjustment foot shown in;

[0026] Figure 5 yes Figure 1 The schematic diagram of the working structure of the electronic scale shown in FIG.

[0027] Figure 6 yes Figure 1 Schematic diagram of the working principle of the electronic scale shown in .

[0028] Reference numerals:

[0029] Electronic scale 10;

[0030] The electronic scale body 100, the scale platform 110, the surface shell 120, the bottom shell 130, and the through hole 131;

[0031] Main control device 200;

[0032] Level adjustment module 300, air pump 310, connecting air pipe 320, level adjustment assembly 330, air chamber body 331, adjustment foot 332, spring 333, sealing ring 334, supporting iron sheet 335;

[0033] Infrared distance sensor 400, transmitting unit 410, receiving unit 420;

[0034] Weighing sensor 500;

[0035] A level indicator device 600, a horizontal level indicator bar 610, a vertical level indicator bar 620, and an LED indicator light 630;

[0036] Display screen 700. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 present invention.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] refer to Figures 1 to 4 The electronic scale 10 according to the embodiment of the present invention includes an electronic scale body 100 , a main control device 200 , four level adjustment modules 300 , four infrared distance sensors 400 and four weighing sensors 500 .

[0041] The electronic scale body 100 is a substantially flat horizontal cube, including a flat weighing platform 110, a surface shell 120 with a flat upper surface, and a bottom shell 130. The weighing platform 110 is located on the upper surface of the surface shell 120, and the bottom shell 130 has a cavity with an opening facing upward. The surface shell 120 covers the opening, and the bottom of the bottom shell 130 has four evenly distributed through holes 131. The four through holes 131 are respectively close to the four corners of the bottom shell 130. It can be understood that the four through holes 131 can also be located at the center of the four sides of the bottom shell 130, and no specific limitation is made here.

[0042] The main control device 200 is located in the cavity of the bottom shell 130 and includes an air pump control module. The main control device 200 can be a single chip microcomputer or a programmable controller.

[0043] The four horizontal adjustment modules 300 are used to adjust the horizontality of the electronic scale body 100. The four horizontal adjustment modules 300 are arranged in a plane. The horizontal adjustment module 300 includes an air pump 310 electrically connected to the air pump control module of the main control device 200 and a horizontal adjustment component 330 connected to the air pump 310 through a connecting air pipe 320. The horizontal adjustment component 330 can be extended and retracted up and down, and the extension length is determined by the air pressure of the air pump 310. The four horizontal adjustment modules 300 are correspondingly arranged in the cavity of the bottom shell 130 on one side of the through hole 131, and one end of the horizontal adjustment component 330 passes through the corresponding through hole 131 and extends downward to the outside of the bottom shell 130.

[0044] The four infrared distance sensors 400 are correspondingly disposed in the through holes 131 , and include a transmitting unit 410 and a receiving unit 420 , which are used to detect the height of the corresponding infrared distance sensor 400 relative to the placement surface and transmit the height information to the main control device 200 .

[0045] The four weighing sensors 500 are respectively located on the upper surfaces of the corresponding horizontal adjustment components 330 and in contact with the lower surface of the surface shell 120 , and are used to obtain weighing data and transmit the weighing information to the main control device 200 .

[0046] Specifically, the electronic scale 10 is supported on the placement surface by the horizontal adjustment components 330 in the four horizontal adjustment modules 300 at the bottom thereof. When the electronic scale 10 is manufactured and shipped, the four weighing sensors 500 of the electronic scale 10 are tested to see if they are in the same horizontal plane. If they are not in the same horizontal plane, the telescopic length of the horizontal adjustment component 330 is adjusted to make the four weighing sensors 500 in the same horizontal plane; when the four weighing sensors 500 are in the same horizontal plane, the distance values ​​measured by the four infrared distance sensors 400 are defined as factory default values, and are defined as H1, H2, H3, H4 respectively, and H1, H2, H3, H4 are stored in the memory of the main control device 200. When the electronic scale 10 is in use, the four infrared distance sensors 400 can quickly measure the actual height of each infrared distance sensor 400 relative to the placement surface, and feed back the measured height information to the main control device 200. The main control device 200 calculates the difference between the actual height of each infrared distance sensor 400 and its factory default value, and adjusts the telescopic length of the corresponding horizontal adjustment component 330 according to the difference (if the difference is greater than zero, the corresponding horizontal adjustment component 330 extends downward; if the difference is equal to zero, there is no need to adjust the horizontal adjustment component 330), so that the four weighing sensors 500 are finally located in the same horizontal plane, and the electronic scale 10 is in a horizontal state, eliminating the error caused by the uneven placement surface, thereby improving the measurement accuracy; at the same time, the telescopic length of the corresponding horizontal adjustment component 330 is adjusted according to the difference, so that it is possible to determine whether the electronic scale 10 is in a horizontal state without the help of a horizontal detection device, avoiding the need for the user to observe the horizontal detection device to determine the horizontal state of the electronic scale 10, making the operation simpler and improving the user experience satisfaction. The horizontal adjustment component 330 is connected to the air pump 310 via the air pipe 320, that is, the horizontal adjustment component 330 is driven up and down by the air pump 310 to control its telescopic length. Such pneumatic leveling method is simple to operate and easy to control. Moreover, since air pressure is used to drive the lifting and lowering, it can achieve efficient automatic leveling without step-by-step lifting and lowering. Even tiny heights can be adjusted, so the horizontal accuracy is higher, and thus the measurement accuracy is higher.

[0047] It should be noted that the number of the through hole 131, the horizontal adjustment module 300, the infrared distance sensor 400 and the weighing sensor 500 may also be three or five, and the specific distribution of the through hole 131, the horizontal adjustment module 300, the infrared distance sensor 400 and the weighing sensor 500 may also be other distribution methods besides being distributed at the four corners, as long as the weighing sensors 500 can all be located in the same horizontal plane, and no specific restrictions are made here.

[0048] In some specific embodiments of the present invention, the infrared distance sensor 400 can be set on the lower surface of the electronic scale body 100. The electronic scale body 100 does not need to be provided with a through hole 131 for installing the infrared distance sensor 400, which has a simple structure and low production cost.

[0049] In some specific embodiments of the present invention, referring to Figure 1 and Figure 4 The horizontal adjustment assembly 330 includes an air chamber body 331 and an adjustment foot 332. The air chamber body 331 is fixed in the cavity of the bottom shell 130. The air chamber body 331 has a cavity with an opening facing downward. One end of the adjustment foot 332 extends to the outside of the air chamber body 331 through the opening. The other end of the adjustment foot 332 is slidably connected to the inner wall of the air chamber body 331 to form an air chamber. The air chamber is connected to the air pump through the connecting air pipe 320. This not only has a simple structure and low cost, but also has a small size.

[0050] In some specific embodiments of the present invention, referring to Figure 1 and Figure 4 The horizontal adjustment assembly 330 further includes a spring 333, which is located in the air chamber body 331. One end of the spring 333 abuts against the adjustment foot 332, and the other end abuts against the air chamber body 331, so as to realize the automatic reset of the adjustment foot 332 and buffer the travel of the adjustment foot 332, thereby stabilizing the expansion and contraction of the horizontal adjustment assembly 330. Of course, one end of the spring 333 may be connected to the adjustment foot 332, and the other end may be connected to the air chamber body 331.

[0051] In some specific embodiments of the present invention, referring to Figure 1 and Figure 4 The horizontal adjustment assembly 330 also includes a sealing ring 225 , and a sealing ring 334 is located between the adjustment foot 332 and the air chamber body 331 to seal the gap between the adjustment foot 332 and the air chamber body 331 .

[0052] In some specific embodiments of the present invention, referring to Figure 1 and Figure 4 The horizontal adjustment assembly 330 also includes a supporting iron sheet 335 , the bottom surface of the supporting iron sheet 335 contacts the top surface of the air chamber body 331 , and provides rigid support for the corresponding weighing sensor 500 to improve the measurement accuracy of the weighing sensor 500 .

[0053] In some specific embodiments of the present invention, referring to Figure 5 and Figure 6 , and also includes a level indicating device 600 electrically connected to the main control device 200. The level indicating device 600 is located on the surface shell 120 of the electronic scale body 100 and is used to display the levelness of the electronic scale body 100, making it convenient for users to observe.

[0054] In some specific embodiments of the present invention, referring to Figure 5 , the horizontal indicator device 600 includes a horizontal horizontal indicator bar 610 and a vertical horizontal indicator bar 620. Both the horizontal horizontal indicator bar 610 and the vertical horizontal indicator bar 620 have 11 LED indicator lights 630 spaced along their axial directions, one of which is located in the center. There are 5 LED indicator lights 630 on each side of the LED indicator light 630 in the center. When one side is lower, the LED indicator lights 630 on that side are brighter. When the indicator light 630 in the center is on, it indicates that the direction it is in is horizontal. This indication method allows users to intuitively understand whether the electronic scale 10 is in a horizontal state, thereby improving user experience satisfaction. It is understandable that the number of LED indicator lights 630 can also be 3, 5, 7, etc., and no specific limitation is made here.

[0055] In some specific embodiments of the present invention, referring to Figure 5 The horizontal level indicator bar 610 and the vertical level indicator bar 620 are combined in a cross shape, and the central LED indicator 630 of the horizontal level indicator bar 610 coincides with the central LED indicator 630 of the vertical level indicator bar 620, and is arranged in a cross shape, which is not only easy to install but also has a novel structural design.

[0056] In some specific embodiments of the present invention, referring to Figure 5 The cross shape is located in the center of the electronic scale body 100, which improves the aesthetics of the electronic scale.

[0057] In some specific embodiments of the present invention, referring to Figure 5 and Figure 6 The electronic scale body 100 includes a display screen 700 electrically connected to the main control device 200. The display screen 700 is a liquid crystal display screen. The display screen 700 is installed on the surface shell 120 of the electronic scale body 100. The display screen 700 can display the weight size and weight unit, so that the user can intuitively obtain the weight size and weight unit, thereby improving the user experience satisfaction. The main control device 200 has an electronic weighing circuit, which includes four weighing sensors 500. The electronic weighing circuit is used and calibrated to measure the weight of an object or person on a weighing platform 110, and the measured weight is displayed on the display screen 700. The weighing sensor 500 forms a component in the corresponding horizontal adjustment component 330 for carrying the weight of the weighing object, and provides a corresponding output signal for the weighing circuit to calculate, thereby obtaining a measurement result for representing the weight of the weighing object.

[0058] In some specific embodiments of the present invention, referring to Figure 6The electronic scale body 100 includes a power module, which is electrically connected to the main control device 200, the level adjustment module 300, the infrared distance sensor 400, the weighing sensor 500 and the display screen 700 to provide power for them to ensure normal operation.

[0059] The specific working process of the utility model is as follows: (1) Automatic leveling: After the electronic scale 10 is stably placed on the placement surface, the four infrared distance sensors 400 can quickly measure the actual height of each infrared distance sensor 400 relative to the placement surface, and feed back the measured height information to the main control device 200. The main control device 200 calculates the difference between the actual height of each infrared distance sensor 400 and its factory default value, and adjusts the telescopic length of the corresponding horizontal adjustment component 330 according to the difference. If the difference is greater than zero, the corresponding horizontal adjustment component 330 extends downward; if the difference is equal to zero, there is no need to adjust the horizontal adjustment component 330 until the centralmost LED indicator 630 of the cross-shaped horizontal indicator device 600 lights up, indicating that the four weighing sensors 500 are located in the same horizontal plane, and the leveling process is completed;

[0060] (2) Weighing process: The object to be weighed is placed on the weighing platform 110, and pressure is applied to the weighing sensor 500, which causes the weighing sensor 500 to deform, thereby changing its impedance. At the same time, the excitation voltage is changed, and a changing analog signal is output. The signal is amplified by the amplifier circuit of the main control device 200 and output to the analog-to-digital converter, which converts it into a digital signal that is easy to process and outputs it to the CPU of the main control device 200 for operation control. The CPU outputs the result to the display screen 700.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least two embodiments or examples of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electronic scale, characterized in that: include: An electronic scale body, wherein the bottom of the electronic scale body has at least three through holes; A main control device, located in the electronic scale body; At least three level adjustment modules are used to adjust the level of the electronic scale body, and at least three of the level adjustment modules are arranged in a plane. The level adjustment modules include an air pump electrically connected to the main control device and a level adjustment component connected to the air pump. The air pump and the level adjustment module are installed in the electronic scale body, and one end of the level adjustment component extends outside the electronic scale body; At least three weighing sensors, respectively arranged on the corresponding level adjustment components, the weighing sensors are electrically connected to the main control device, and are used to obtain weighing data and transmit weighing information to the main control device; At least three infrared distance sensors are respectively arranged on the electronic scale body corresponding to one side of the horizontal adjustment module, the infrared distance sensors are correspondingly arranged in the through holes, the infrared distance sensors are electrically connected to the main control device, and the infrared distance sensors include a transmitting part and a receiving part for detecting the height of the corresponding infrared distance sensor relative to the placement surface and transmitting the height information to the main control device; It also includes a level indicator device electrically connected to the main control device and used to display the levelness of the electronic scale body. The level indicator device is located on the electronic scale body.

2. The electronic scale according to claim 1, characterized in that: The horizontal adjustment assembly includes an air chamber body and an adjustment foot. The air chamber body is fixed in the electronic scale body. The air chamber body has a cavity with an opening facing downward. One end of the adjustment foot extends out of the air chamber body through the opening. The other end of the adjustment foot is slidably connected to the inner wall of the air chamber body to form an air chamber. The air chamber is connected to the air pump.

3. The electronic scale according to claim 2, characterized in that: The horizontal adjustment assembly also includes a spring, which is located in the air chamber body, has one end abutting or connected to the adjustment foot, and the other end abutting or connected to the air chamber body.

4. The electronic scale according to claim 2 or 3, characterized in that: The level adjustment assembly further comprises a sealing ring, which is located between the adjustment foot and the air chamber body.

5. The electronic scale according to claim 2 or 3, characterized in that: The horizontal adjustment assembly also includes a supporting iron sheet, the bottom surface of which is in contact with the top surface of the air chamber body.

6. The electronic scale according to claim 1, characterized in that: The horizontal indicator device comprises a transverse horizontal indicator bar and a longitudinal horizontal indicator bar. The transverse horizontal indicator bar and the longitudinal horizontal indicator bar each have at least three LED indicator lights spaced along their axial direction, and one of the LED indicator lights is located in the center.

7. The electronic scale according to claim 6, characterized in that: The horizontal level indicator bar and the vertical level indicator bar are combined to form a cross shape, and the LED indicator at the center of the horizontal level indicator bar overlaps with the LED indicator at the center of the vertical level indicator bar.

8. The electronic scale according to claim 7, characterized in that: The cross is located in the center of the scale surface.

Images