CN219225756U - Knob display device based on magnetic sensor - Google Patents

Abstract

The utility model discloses a knob display device based on a magnetic sensor, which comprises: the bracket is provided with an interface connected with a circuit board with a magnetic sensor; a rotating member rotatable circumferentially with respect to the bracket and provided with a connection structure for connection with the magnet; and the magnet is connected to the rotating component through the connecting structure and synchronously rotates along with the rotating component, and the rotation angle information of the magnet can be detected by the magnetic sensor. The utility model can simply and clearly show the displacement measurement function of the Hall sensor module.

Description

Knob display device based on magnetic sensor

Technical Field

The utility model relates to the technical field of Hall sensors, in particular to a knob display device based on a magnetic sensor.

Background

Hall effect is one of the magnetoelectric effects, which was found in 1879 when studying the conductive mechanism of metals. It was found that semiconductors, conductive fluids, etc. have such effects, and that the hall effect of semiconductors is much stronger than that of metals, and various hall devices made by using such phenomena are widely used in industrial automation technology, detection technology, information processing, etc.

The three-axis hall sensor can measure magnetic fields in X, Y and Z axes. The Hall effect sensor is a common method for measuring the angle in the system, has the advantages of high precision, high consistency and high reliability, and can accurately sense the rotation and angle information of an object in the system.

When a worker of a hall sensor introduces a function and an application of a product to a customer or related personnel, for example, introduces an angle measurement function of the hall sensor, the worker usually adopts a means of dictating, PPT and small video to develop, but the worker is often limited by whether the product introducer understands the product in place or not, or whether the worker expresses the capability of the product in good or bad, so that the means of dictating, PPT and video have limitations. If a mechanical structure specially used for displaying the functions of the Hall sensor can be designed, the angle measurement function of the Hall sensor can be well displayed, and a vast customer group and related personnel can acquire the most visual information about the functions of the product.

Accordingly, there is a need for a knob display device based on a magnetic sensor.

Disclosure of Invention

The utility model aims to provide a knob display device based on a magnetic sensor.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: provided is a knob display device based on a magnetic sensor, comprising:

the bracket is provided with an interface connected with a circuit board with a magnetic sensor;

a rotating member rotatable circumferentially with respect to the bracket and provided with a connection structure for connection with the magnet;

and the magnet is connected to the rotating component through the connecting structure and synchronously rotates along with the rotating component, and the rotation angle information of the magnet can be detected by the magnetic sensor. The support is provided with a first holding part and a second holding part, and the main body of the rotating component is circumferentially and rotationally arranged in a space between the first holding part and the second holding part.

The first holding part and the second holding part are respectively provided with a first semicircular groove and a second semicircular groove which are arranged oppositely, the first semicircular groove and the second semicircular groove form a circular groove oppositely, and the main body of the rotating part is rotationally arranged in the circular groove in a sleeved mode.

An operation end is arranged around the upper side of the operation end of the upper side of the main body of the rotating component, the operation end is arranged above the first holding part and the second holding part, and an inverted circular truncated cone structure is arranged on the lower side of the main body of the rotating component.

The device also comprises at least two elastic support elements, wherein the upper surfaces of the first holding part and the second holding part are respectively abutted with the lower surface of the operation end through one elastic support element.

The bracket is provided with a scale part which is used for indicating the angle information rotated by the rotating component;

the scale part comprises a zero point value, a first scale part arranged on the left side of the zero point value and a second scale part arranged on the right side of the zero point value, and the first scale part and the second scale part are respectively provided with a scale value.

The operation end is provided with an indication structure, and the indication structure points to the scale part.

The connecting structure is a groove with a downward opening formed in the center of the lower part of the main body of the rotating component, the magnet is embedded in the groove, and the magnet is a cylindrical magnet.

The interface is a clamping groove formed in the lower portion of the support, the circuit board is provided with a clamping portion which enters the clamping groove, the clamping portion is matched with the clamping groove to enable the support to be connected with the circuit board, and the magnetic sensor is arranged on the clamping portion; the lower surface of the clamping groove is provided with a blind groove with a downward opening, an embedded nut is arranged in the blind groove, and a screw penetrates through a screw through hole preset in the clamping part to be matched with the embedded nut, so that the circuit board is locked in the clamping groove.

And an empty-avoiding groove is arranged at the bottom of the clamping groove along the extending direction of the clamping groove.

The utility model has the beneficial effects that:

1. the rotating component drives the magnet to rotate, and a rotating angle is generated relative to the Hall sensor module, so that the Hall sensor module can sense the rotating state and real-time angle information of an object in the system in a quasi-visual manner;

2. through multiple rotations of the rotating member at different angles, the Hall effect sensor can exhibit the advantages of high consistency, high precision and high reliability of the angle detection.

Drawings

FIG. 1 is a schematic diagram illustrating one embodiment of a magnetic sensor based knob presentation.

FIG. 2 is another view of the magnetic sensor-based knob presentation device shown in FIG. 1.

Fig. 3 is a schematic view of one embodiment of a stent.

Fig. 4 is a schematic view of another embodiment of a stent.

FIG. 5 is a schematic view of an embodiment of a rotating member.

Fig. 6 shows a schematic view of another embodiment of a rotating member.

FIG. 7 is a schematic diagram of the magnetic field components of the XY two axes for one revolution of the magnet.

Fig. 8 is a schematic view of angle sensing.

FIG. 9 is a schematic diagram showing the magnetic field variation of the key function

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the following, the terms "comprises", "comprising", "having" and their cognate terms as used in various embodiments of the utility model are intended to refer only to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be taken to first exclude the presence of or increase the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

Furthermore, the terms "first," "second," "third," and the like, as used herein, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the utility model belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the utility model.

The magnetic sensor includes various types, for example: magneto-resistive effect sensors, geomagnetic sensors, hall sensors, etc., are described as hall sensors in the present utility model.

Such as energizing a block of semiconductor material and exposing the semiconductor material to a magnetic field. The magnetic force lines are applied to the semiconductor material, so that charge carriers, electrons and holes in the conductive material are deflected to the other side of the semiconductor plate, and a potential difference is generated. The potential difference is processed to obtain information such as the magnitude and angle of the magnetic field.

As described in the background art, when a worker of a manufacturer of a hall sensor introduces a function and an application of a product to a customer or a related person, for example, when introducing an angle measurement function of the hall sensor, the worker usually adopts a means of dictating, PPT and small video to develop, but the worker often is limited by whether the product introducer understands the product in place or whether the product introducer expresses the good or bad of the capability of the product, so that the means of dictating, PPT and video have limitations. If a mechanical structure specially used for displaying the functions of the Hall sensor can be designed, the angle measurement function of the Hall sensor can be well displayed, and a vast customer group and related personnel can acquire the most visual information about the functions of the product. Based on this, the applicant has filed the present application.

The Hall sensor with the angle measurement function is widely applied to various knobs, the industry is used to call the knob with the Hall sensor as a magnetic knob, different menus are selected by rotating different angles, the rotating angles are required to be well identified at the moment, high precision and high repeatability are required, and the accuracy of the selected menus is ensured; the device is widely applied to various manipulators, and is used for accurately controlling the joint rotation angle of the manipulator, so as to ensure the operation accuracy of the manipulator; in addition, the intelligent door lock is also applied to cases of intelligent door locks, intelligent garbage cans and the like.

Referring to fig. 1-2, wherein fig. 1 and 2 are views of the present utility model from different angles above the present utility model, and fig. 3 and 4 are views of the present utility model from different angles below the present utility model.

The present application provides a knob display device 100 based on a magnetic sensor, comprising:

a bracket 1, wherein the bracket 1 is provided with an interface for connecting with a circuit board with a magnetic sensor;

a rotating member 2 rotatable circumferentially with respect to the bracket 1 and provided with a connection structure for connection with the magnet 3;

it should be noted that, the rotating member 3 may freely rotate circumferentially on the support 1 in a clockwise or counterclockwise direction, and the connection structure is a structure that the support 1 is connected to the magnet 3, so that the magnet 3 may be connected to (fixed to) the support 1, for example, by adhering, designing a groove structure, embedding the magnet 3 into the groove structure, designing a holding structure, holding the magnet on the holding structure, and so on, where the connection structure is taken as an embodiment of the groove structure, that is, a groove structure is provided at a relevant portion of the rotating member 2, and the magnet 3 is embedded into the groove structure, so that the magnet 3 and the rotating member 2 are connected together, as will be described in detail below.

And a magnet 3 connected to the rotating member 2 through the connection structure and rotated synchronously with the rotating member 2, and rotation angle information of the magnet can be detected by the magnetic sensor. Wherein the preferred direction of magnetization of the magnet 3 is radial magnetization.

In all the embodiments of the present utility model, the hall sensor module 4 is taken as an example, wherein the hall sensor module 4 is fixed relative to the rotating member 2 during actual measurement, and is used for detecting the rotation angle information of the magnet 3 relative to the hall sensor module 4;

in addition, the hall sensor module 4 is assembled on the circuit board 5, and is used for receiving and amplifying the rotation angle information detected by the hall sensor module 4, analyzing and processing the rotation angle information, and sending the rotation angle information to a display module for display.

Referring to fig. 7, more specifically, using a radially magnetized magnet and making the hall sensor module 4 and the magnet be on axis, ideally, the magnet 3 rotates one revolution to make the magnetic induction intensity collected BY the hall sensor module 4, and plotting the magnetic field and the XY plane coordinate axis as the abscissa and the XY axis magnetic field intensity as the ordinate, two curves having the same amplitude, no offset and orthogonality are obtained, wherein the phase difference of the two curves is 90 °, that is, as shown in fig. 7, the phase difference of BX and BY is 90 °. Referring to fig. 8, if the X-axis magnetic field strength is plotted on the abscissa and the Y-axis magnetic field strength is plotted on the ordinate, a circle is obtained, and the radius of the circle is the magnetic field strength detected by the XY plane under ideal conditions, which indicates that the XY plane magnetic field strength is unchanged during the rotation of the magnet.

It should be noted that BX is the X-axis magnetic field strength, and BY is the Y-axis magnetic field strength, as will be described later.

Referring to fig. 2, 5 and 6, the main body 20 of the rotating member 2 has a cylindrical structure, and the main body 20 of the rotating member 2 is rotatably disposed on the bracket 1. The rotating member 2 is rotatably disposed on the bracket 1 through a main body 20 of a cylindrical structure, and in particular, the cylindrical body is a cylinder, so that the rotating member can rotate more conveniently and smoothly.

In this embodiment, the rotating member 2 is a member that passively rotates under the driving of an external force when the angle measurement function is displayed, for example, the hall sensor module 4 detects the angle information of the rotating member 2 rotating in the circumferential direction by rotating the rotating member 2 in the circumferential direction by an angle value of 30 °, 60 °, 90 °, 180 °, 240 °, 270 °, 360 °, and the like.

Referring to fig. 3, the bracket 1 is provided with a first grip portion 11 and a second grip portion 12, and the main body 20 of the rotating member 2 is provided in a space between the first grip portion 11 and the second grip portion 12 in a circumferential rotation manner.

The space between the first holding portion 11 and the second holding portion 12 should be slightly larger than the outer diameter of the main body 20 of the rotating component 2, so that it can be ensured that the main body 20 of the rotating component 2 rotates in a limited manner, it can be ensured that the rotating component 2 does not deviate in other directions during rotation, and the accuracy of measuring the rotation angle of the rotating component 2 by the hall sensor module 4 can be further improved.

In the embodiment shown in fig. 3 and 4, further, the first holding portion 11 and the second holding portion 12 are provided with a first semicircular groove and a second semicircular groove which are disposed opposite to each other, and the first semicircular groove and the second semicircular groove form a circular groove 13 opposite to each other, that is, the circular groove 13 is formed by combining the first semicircular groove and the second semicircular groove which are disposed opposite to each other, and the main body 20 of the rotating member 2 is rotatably disposed in the circular groove 13.

As a further extension of the previous embodiment, the space between the first grip portion 11 and the second grip portion 12 is the circular groove 13. Specifically, referring to fig. 2, 3 and 4, the materials of the first grip portion 11 and the second grip portion 12 may be plastic materials, a gap 15 is disposed between the opposite end surfaces of the first grip portion 11 and the second grip portion 12, and the gap is 1-5mm, so as to better accommodate the main body 20 of the rotating component 2.

Referring to fig. 2, 5 and 6, an operation end 21 is disposed around the upper side of the operation end of the main body 20 of the rotating member 2, the operation end 21 is disposed above the first grip portion 11 and the second grip portion 12, and an inverted circular truncated cone structure 25 is disposed around the lower side of the main body of the rotating member 2.

By arranging the operation end 21, the angle measuring device is more suitable for displaying the angle measuring function, and is convenient for a user to hold and rotate.

Further, since the gap 15 is provided between the opposite end surfaces of the first grip portion 11 and the second grip portion 12, the main body 20 of the rotating member 2 can smoothly enter the circular groove 13 from the upper side, and the inverted circular truncated cone structure 25 plays a good role in blocking, so as to prevent the circular groove 13 of the rotating member 2 from sliding upwards.

Referring to fig. 3 and 9, the device further comprises at least two elastic support elements 6 and 7, and the upper surfaces of the first holding portion 11 and the second holding portion 12 are respectively abutted with the lower surface of the operating end 21 through one elastic support element 6 and 7.

In one embodiment, spring grooves are formed on the upper surfaces of the first and second holding portions 11 and 12 (in addition, the spring grooves may be formed on the periphery of the lower surface of the operating end 21, or the upper surfaces of the first and second holding portions 11 and 12 and the lower surface of the operating end 21 may be formed with oppositely disposed spring grooves), and the spring grooves 8 and 9 are used for fixing the elastic support members 6 and 7. In particular, in the embodiment shown in fig. 3, the upper surfaces of the first grip portion 11 and the second grip portion 12 are respectively provided with a spring groove 8, 9, the lower ends of the elastic support elements 6, 7 are respectively fixedly disposed in the spring grooves 8, 9, and the upper ends of the elastic support elements 6, 7 are convexly disposed above the spring grooves 8, 9 and can contact with the lower surface of the operating end 21.

In order to better illustrate the assembly of the elastic support elements 6, 7 with the spring grooves 8, 9, respectively, as shown in fig. 3, wherein the elastic support element 6 is not inserted into the spring groove 8, the elastic support element 6 is illustrated beside the spring groove 8, and the lower end of the elastic support element 7 is inserted into the spring groove 9 to illustrate the assembly.

Therefore, the elastic supporting element 6 and the elastic supporting element 7 are arranged together, so that the pressing function can be realized, when the operation end 21 is pressed downwards by external force, the rotating part 2 can generate downward displacement, and when the external force is removed due to the existence of the elastic supporting element 6 and the elastic supporting element 7, the rotating part 2 can be restored.

Referring to fig. 9, when the operating end 21 is pressed down, since the distance of the magnet 3 from the hall sensor module 4 is closer, the maximum values of the magnetic field intensities detected in the X-axis and Y-axis directions become larger. Accordingly, the operation of pressing the operation terminal 21 can be detected by the hall sensor module 4, and the operation information can be transmitted to the circuit board 5, and the circuit board 5 can generate a corresponding control signal in the operation information.

Referring to fig. 2, the bracket 1 is provided with a scale portion 22, and the scale portion 22 is used for indicating angle information of rotation of the rotating member 2.

The scale portion 22 includes a zero point value, a first scale portion 22a disposed on the left side of the zero point value, and a second scale portion 22b disposed on the right side of the zero point value, wherein the first scale portion 22a and the second scale portion 22b are each provided with a scale value.

The minimum scale values of the scale values at the first scale portion 22a and the second scale portion 22b are both millimeter.

By providing the zero point value and the first scale portion 22a provided on the left side and the second scale portion 22b provided on the right side of the zero point value, it is possible to intuitively indicate the real-time angle information when the rotating member is stopped at the zero point value and is rotated left or right.

Referring to fig. 2, the scale portion 22 is disposed on the peripheral side of the operation end 21, and the zero point value is disposed at a position related to the fixing direction of the hall sensor module 4. In order to better preserve the definition of the graduation portion 22 during long-term use, the graduation portion 22 may be engraved on the peripheral side of the operating end 21 by means of laser engraving. The minimum scale value of the scale values at the first scale portion 22a and the second scale portion 22b is 1 °. Through the general application field of the hall sensor module 4, the minimum unit of the angle rotation information detected by the hall sensor module 4 is 1 °, which meets the requirements on angle measurement in most application scenarios of the hall sensor module 4, when the scale values are 1 ° at the minimum scale values of the first scale portion 22a and the second scale portion 22b, the minimum can be estimated to be 0.1 °, and the maximum ranges of the first scale portion 141 and the second scale portion 142 are 180 °

In practical applications, the hall sensor module 4 is disposed below or above the magnet 3, and in particular, in the embodiment shown in fig. 1 and 2, the hall sensor module 4 is designed below the magnet 3.

Referring to fig. 2, the operating end 21 is provided with an indicating structure 23, and the indicating structure 23 points to the scale portion.

By arranging the indicating structure 23, the rotation angle information of the rotating component can be better indicated on the scale portion 22, that is, the indicating structure 23 is as close to the scale value on the scale portion 22 as possible, so that reading is more convenient, and reading errors caused by naked eye limitation can be reduced.

Referring to fig. 5, the connection structure is a groove 24 with a downward opening opened at the center of the lower portion of the main body 20 of the rotating member 2, the magnet 3 is embedded in the groove 24, and the magnet 3 is a cylindrical magnet.

By providing the recess 24, the magnet 3 can be firmly embedded, and the magnet 3 can be replaced more quickly to detect different magnets 3, and in case of qualified other external conditions, it can be used to verify whether the magnet 3 can generate a desired magnetic field strength. The utility model is therefore also used to verify whether the magnet 3 is capable of producing a satisfactory magnetic field strength.

Referring to fig. 1, 2 and 4, the interface is a clamping groove 14 formed in the lower portion of the bracket 1, the circuit board 5 has a clamping portion 51 that enters the clamping groove 14, the clamping portion 51 cooperates with the clamping groove 14 to connect the bracket 2 with the circuit board 5, and the hall sensor module 4 is disposed on the clamping portion.

Specifically, in practical design, the whole of the bracket 1 is rectangular, the clamping groove 14 is disposed in the center of the lower portion of the bracket 1, the clamping portion 51 is a part of the circuit board 5, and the hall sensor module 4 is welded at the center of the front end of the clamping portion 51 and is located directly below the rotating member 2.

Referring to fig. 2 and 4, a blind groove (not shown) with a downward opening is formed in the lower surface of the clamping groove 14, a mosaic nut 16 is disposed in the blind groove, and a screw 17 passes through a screw through hole preset in the clamping portion 51 to cooperate with the mosaic nut 16, so as to lock the circuit board 5 in the clamping groove 14;

referring to fig. 4, a void-free groove 19 is disposed at the bottom of the card slot 14 along the extending direction of the card slot 14.

The clamping groove 14 is integrally formed in the bracket 1, so by arranging the embedded nuts 16, the screw 17 can be ensured to say that the clamping part 51 is locked on the clamping groove 14, and in one embodiment, the number of blind grooves is two, one embedded nut 16 is arranged in each blind groove, by arranging two blind grooves and embedded nuts 16, the clamping part 51 can be ensured to be stably fixed on the clamping groove 14, and the hall sensor module 4 is fixed, so that the measurement accuracy is ensured.

Because the hall sensor module 4 is welded at the center of the front end of the engaging portion 51, when the engaging portion 51 enters the clamping groove 14, the space is reserved for the hall sensor module 4 and other components by providing the space avoiding groove 19, so that the hall sensor module 4 and other components are prevented from knocking against the bottom of the clamping groove 14, and the damage of the components is prevented.

In an embodiment, the circuit board 5 is provided with an interface unit for communication with an external device. In this embodiment, the communication interface unit may be a wired interface unit, for example, a USB port, a Mini-USB port, a T-pec port, or a wireless communication interface unit, for example, a bluetooth unit, etc. The angle information detected by the hall sensor module 4 is transmitted to an external device, such as a computer, through the interface unit, and is further processed through the computer.

Referring to fig. 7, since the rotating member 2 rotates circumferentially in the XY plane, taking the X-axis magnetic field strength BX as an example, when the rotating member 2 rotates from 0 ° to 360 °, the magnetic field strength varies regularly from: 0→positive maximum→0→negative maximum→0. And the Y-axis magnetic field strength BY is changed according to the cosine function curve law: negative maximum → 0 → positive maximum → 0 → negative maximum.

Referring to fig. 8, if the size of the Angle (Angle) through which the rotating member 2 rotates is calculated, the calculation is performed as follows:

the utility model is described below in connection with practical measurement applications:

referring to fig. 2 and 8, the rotating member 2 is rotated to the leftmost side of the first scale part 22a (the rightmost side of the second scale part 22 b), and if this is a zero value, i.e., 0 °, by=0, bx=maximum, and the Angle value detected BY the hall sensor module 4 BY the rotating member 2 (magnet 3) should be 0 °, or a value very close to 0 °, e.g., 0.3 °, 0.5 °,1 °, or the like, to show the Angle measurement function and accuracy of the hall sensor module 4.

When the rotating member 2 rotates clockwise, the Angle pointer moves from the first quadrant toward the Y-axis positive direction, (refer to fig. 8, which is a process of increasing the Angle value counterclockwise), BY increases gradually, and BX decreases gradually, and when by=maximum, bx=0, the Angle value of the rotating member 2 (magnet 3) detected BY the hall sensor module 4 should be 90 °, or a value very close to 90 °, for example, 89.5 °, 90.5 °, 91 °, or the like, to show the Angle measurement function and accuracy of the hall sensor module 4.

As the rotating member 2 continues to rotate clockwise, the Angle pointer is moved from the second quadrant in the negative X-axis direction, (refer to fig. 8, which is a process of increasing the Angle value counterclockwise), BY is gradually decreased, and BX is gradually increased in the negative X-axis direction, and when by=0, bx=the maximum value of the negative X-axis direction, the Angle value detected BY the hall sensor module 4 of the rotating member 2 (magnet 3) should be 180 ° or a value very close to 180 °, for example, 179.5 °, 180.5 °, 181 °, or the like, to show the Angle measuring function and accuracy of the hall sensor module 4.

As the rotating member 2 continues to rotate clockwise, the Angle pointer is moved from the third quadrant in the negative Y-axis direction, (refer to fig. 8, which is a process of increasing the Angle value in the counterclockwise direction), BY increases in the negative Y-axis direction, BX decreases in the negative X-axis direction, and when by=the negative Y-axis direction is maximum, bx=0, the Angle value detected BY the hall sensor module 4 should be 270 ° or a value very close to 270 °, for example, 269.5 °, 270.5 °, 271 ° or the like, to show the Angle measurement function and accuracy of the hall sensor module 4.

As the rotating member 2 continues to rotate clockwise, the Angle pointer moves from the fourth quadrant toward the positive X-axis direction, (refer to fig. 8, which is a process of increasing the Angle value counterclockwise), BY decreases gradually in the negative Y-axis direction, and BX increases gradually in the positive X-axis direction, and when by=0, bx=x-axis positive direction is the maximum value, the Angle value detected BY the hall sensor module 4 BY the rotating member 2 (magnet 3) should be 360 ° (or 0 °), or a value very close to 360 °, such as 359.5 °, 360.5 °, 361 ° or the like, to show the Angle measurement function and accuracy of the hall sensor module 4.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the claims, which follow, as defined in the claims.

Claims (11)

1. A knob presentation device based on a magnetic sensor, comprising:

the bracket is provided with an interface connected with a circuit board with a magnetic sensor;

a rotating member rotatable circumferentially with respect to the bracket and provided with a connection structure for connection with the magnet;

and the magnet is connected to the rotating component through the connecting structure and synchronously rotates along with the rotating component, and the rotation angle information of the magnet can be detected by the magnetic sensor.

2. The knob display device based on a magnetic sensor according to claim 1, wherein the bracket is provided with a first holding portion and a second holding portion, and the main body of the rotating member is rotatably provided in a space between the first holding portion and the second holding portion.

3. The knob display device based on a magnetic sensor according to claim 2, wherein the first holding portion and the second holding portion are respectively provided with a first semicircular groove and a second semicircular groove which are arranged oppositely, the first semicircular groove and the second semicircular groove form a circular groove oppositely, and the main body of the rotating member is rotatably arranged in the circular groove in a sleeved mode.

4. The knob display device based on a magnetic sensor according to claim 2, wherein an operation end is provided around an upper side of an upper operation end of a main body of the rotating member, the operation end is provided above the first and second holding portions, and an inverted truncated cone structure is provided around a lower side of the main body of the rotating member.

5. The knob display device according to claim 4, further comprising at least two elastic support members, wherein the upper surfaces of the first and second holding portions are respectively abutted with the lower surface of the operation end through one of the elastic support members.

6. The magnetic sensor-based knob display device according to claim 4, wherein the bracket is provided with a scale portion for indicating angle information rotated by the rotating member;

the scale part comprises a zero point value, a first scale part arranged on the left side of the zero point value and a second scale part arranged on the right side of the zero point value, and the first scale part and the second scale part are respectively provided with a scale value.

7. The magnetic sensor-based knob display device according to claim 6, wherein the operation end is provided with an indication structure, and the indication structure is directed to the scale portion.

8. The knob display device based on a magnetic sensor according to claim 1, wherein the connection structure is a groove opened at a center of a lower portion of the main body of the rotating member with an opening facing downward, the magnet is embedded in the groove, and the magnet is a cylindrical magnet.

9. The knob display device according to any one of claims 1-5, wherein the interface is a slot formed in a lower portion of the bracket, the circuit board has a locking portion that enters the slot, and the locking portion cooperates with the slot to connect the bracket to the circuit board, wherein the magnetic sensor is disposed on the locking portion.

10. The knob display device based on the magnetic sensor according to claim 9, wherein a blind groove with a downward opening is formed in the lower surface of the clamping groove, an embedded nut is arranged in the blind groove, and a screw penetrates through a screw through hole preset in the clamping portion to be matched with the embedded nut, so that the circuit board is locked in the clamping groove.

11. The knob display device according to claim 9, wherein a space-avoiding groove is provided at a bottom of the card slot in a direction in which the card slot extends.

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