阅读说明：本技术 一种感应旋钮以及感应旋钮的控制方法 (Induction knob and control method thereof ) 是由 姚振华 毛勇斌 于 2020-06-15 设计创作，主要内容包括：本发明公开了一种感应旋钮及感应旋钮的控制方法,此感应旋钮及感应旋钮的控制方法将用于产生控制信号的永磁体和霍尔元件的安装方式进行改变,在旋钮组件中设置径向永磁体,并在操作面板的另一侧与径向永磁体同轴设置霍尔元件,能避免永磁体过多时导致的相互间的磁场干扰,此感应旋钮通过霍尔元件接收单个径向永磁体旋转过程中产生的磁极变化信号,来达到对档位的调节,整体结构更为简洁,且感应和控制精度更为准确,此发明用于家用电器领域。(The invention discloses an induction knob and a control method thereof, wherein the induction knob and the control method thereof change the installation mode of a permanent magnet and a Hall element for generating control signals, a radial permanent magnet is arranged in a knob component, the Hall element is coaxially arranged on the other side of an operation panel and the radial permanent magnet, the mutual magnetic field interference caused by excessive permanent magnets can be avoided, the induction knob receives a magnetic pole change signal generated in the rotation process of a single radial permanent magnet through the Hall element, so that the gear adjustment is achieved, the integral structure is simpler, the induction and control precision is more accurate, and the induction knob and the control method are used in the field of household appliances.)

1. An induction knob, characterized by: the inductive knob comprises a knob assembly and a knob support which are arranged on two sides of an operation panel respectively, wherein a second annular permanent magnet is arranged in the knob support, a first annular permanent magnet is arranged in the knob assembly, opposite surfaces of the second annular permanent magnet and the first annular permanent magnet are opposite in attraction, a detection device and a Hall element arranged on the detection device are arranged on the same side of the knob support, a radial permanent magnet is arranged in the knob assembly, the radial permanent magnet and the Hall element are coaxially arranged, and the radial permanent magnet is axially symmetrically arranged along a rotating shaft of the inductive knob.

2. The sensing knob of claim 1, wherein: the knob support is fixedly installed on one side of the operation panel, a first annular groove is formed in the knob support, and the second annular permanent magnet is embedded into the first annular groove and fixedly installed in the first annular groove.

3. The sensing knob of claim 2, wherein: the knob assembly comprises a knob seat and a knob cover which are mutually buckled to form a box body, the radial permanent magnet is installed at the center of the knob cover, and the first annular permanent magnet is arranged in the knob seat in a surrounding mode and fixedly arranged on the radial permanent magnet.

4. The sensing knob of claim 3, wherein: the second annular permanent magnet and the first annular permanent magnet are coaxially arranged with a rotating shaft of the knob assembly.

5. The induction knob according to claim 2 or 3, wherein: the second annular permanent magnet and the first annular permanent magnet are the same in size and specification.

6. The sensing knob of claim 1, wherein: the distance between the bottom surface of the radial permanent magnet and the upper surface of the Hall element is 10-20 mm.

7. The sensing knob of claim 6, wherein: the distance between the bottom surface of the radial permanent magnet and the upper surface of the Hall element is 13 mm.

8. The sensing knob of claim 6, wherein: the diameter of the radial permanent magnet is 8-10 mm.

9. A control method of an induction knob is characterized in that the induction knob comprises a knob component and a knob support which are respectively arranged at two sides of an operation panel, a detection device and a Hall element which is installed on the detection device are also arranged at the same side of the knob support, a radial permanent magnet is arranged in the knob component, the radial permanent magnet and the Hall element are coaxially arranged, the radial permanent magnet is axially symmetrically arranged along a rotating shaft of the inductive knob, and the control method of the induction knob comprises the following steps:

1) the knob component is driven to rotate around the axis of the knob component, and the radial permanent magnet is driven to rotate through the knob component;

2) the radial permanent magnet rotates to drive the N pole and the S pole at the two ends of the radial permanent magnet to rotate, and a magnetic field which changes orderly is generated;

3) and the Hall element detects the direction of the change of the magnetic pole in the magnetic field and the frequency signal of the change of the magnetic pole, and feeds the detected signal back to the control device through the detection device to generate a control signal.

Technical Field

The invention relates to the field of household appliances, in particular to an induction knob and a control method of the induction knob.

Background

The existing switch knobs belong to switch knobs in physical connection, such as potentiometer type switch knobs and coded switch knobs with rods, the physical connection knobs damage the integrity and the tightness of equipment shells due to the fact that holes need to be formed in panels of electrical equipment, stress strength of the panels can be weakened greatly, external pollutants of the equipment can enter the equipment easily, and the internal parts and circuits of the equipment are polluted and damaged. And simultaneously, the cleaning of the panel is hindered to a certain extent, and the service life is influenced by the abrasion of a mechanical structure in use.

An induction type switch knob appears, for example, chinese patent application with an authorization publication number of CN105281732B, "an induction type switch knob and a coding method thereof," wherein the disclosed induction type switch knob includes an induction switch circuit board and a knob assembly, a plurality of hall switches are disposed on the induction switch circuit board, the knob assembly includes a knob base and a plurality of permanent magnets distributed on the same circumference of an inner shell of the knob base, and the hall switches determine the rotating direction and the induction coding number of the knob assembly through the change of a magnetic field when the knob assembly rotates. In the structure, the wave particle radiation of the magnetic field between the permanent magnets in the knob assembly can interfere with gear adjustment, and the accuracy of the Hall switch in signal judgment is influenced.

Meanwhile, the inductive switch knob with the plurality of Hall elements and the permanent magnet is adopted on the circumference of the knob, the production process is complex, and the volume of the knob and the size of the circuit board can be increased.

Disclosure of Invention

The invention aims to solve at least one of the technical problems in the prior art, and provides an induction knob and a control method of the induction knob, which can effectively avoid the interference of magnetic field radiation in the induction knob on gear adjustment and have higher induction precision.

According to a first aspect of the present invention, an induction knob is provided, including a knob assembly and a knob support respectively disposed at two sides of an operation panel, a second annular permanent magnet is disposed in the knob support, a first annular permanent magnet is disposed in the knob assembly, opposite surfaces of the second annular permanent magnet and the first annular permanent magnet are opposite to each other, a detection device and a hall element mounted on the detection device are further disposed at the same side of the knob support, a radial permanent magnet is disposed in the knob assembly, the radial permanent magnet and the hall element are coaxially disposed, and the radial permanent magnet is axially symmetrically disposed along a rotation axis of the inductive knob.

A control method of an induction knob comprises a knob assembly and a knob support which are respectively arranged at two sides of an operation panel, a detection device and a Hall element arranged on the detection device are also arranged at the same side of the knob support, a radial permanent magnet is arranged in the knob assembly, the radial permanent magnet and the Hall element are coaxially arranged, the radial permanent magnet is axially symmetrically arranged along a rotating shaft of the induction knob, and the control method of the induction knob comprises the following steps:

1) the knob component is driven to rotate around the axis of the knob component, and the radial permanent magnet is driven to rotate through the knob component;

2) the radial permanent magnet rotates to drive the N pole and the S pole at the two ends of the radial permanent magnet to rotate, and a magnetic field which changes orderly is generated;

3) the Hall element detects signals of the direction of the change of the magnetic pole in the magnetic field and the frequency of the change of the magnetic pole, and feeds the detected signals back to the control device through the detection device,

a control signal is generated.

Has the advantages that: the induction knob and the control method of the induction knob change the installation mode of the permanent magnet and the Hall element used for generating the control signal, the radial permanent magnet is arranged in the knob component, the Hall element is coaxially arranged on the other side of the operation panel and the radial permanent magnet, the mutual magnetic field interference caused by the excessive permanent magnet can be avoided, the induction knob receives the magnetic pole change signal generated in the rotation process of the single radial permanent magnet through the Hall element, the adjustment of the gear is achieved, the overall structure is simpler, and the induction and control precision is more accurate.

According to the induction knob in the embodiment of the first aspect of the invention, the knob bracket is fixedly installed on one side of the operation panel, the knob bracket is provided with a first annular groove, and the second annular permanent magnet is embedded into the first annular groove and fixedly installed.

The knob support is fixedly installed below the operation panel, the second annular permanent magnet is installed in the fixedly installed knob support, the second annular permanent magnet is clamped and fixedly limited through a first annular groove formed in the knob support, and the knob support can be conveniently assembled in a structure.

According to the induction knob in the embodiment of the first aspect of the invention, the knob assembly comprises a knob seat and a knob cover which are mutually buckled to form a box body, the radial permanent magnet is arranged in the center of the knob cover, and the first annular permanent magnet is fixedly arranged in the knob seat and surrounds the radial permanent magnet.

The knob assembly is an integrally movable component, and is positioned on the operation panel through the mutual attraction force between the first annular permanent magnet and the second annular permanent magnet.

The knob subassembly includes knob seat and knob lid, forms the box body after knob seat and knob lid lock, and first annular permanent magnet is installed in the knob subassembly, and the accessible sets up the second annular groove in knob seat or knob box and fixes first annular permanent magnet, and its overall structure can realize fixing through lock each other, and it is extremely convenient to assemble.

According to the induction knob of the embodiment of the first aspect of the present invention, the second annular permanent magnet and the first annular permanent magnet are coaxially disposed with the rotation shaft of the knob assembly.

According to the induction knob of the embodiment of the first aspect of the present invention, the second annular permanent magnet and the first annular permanent magnet have the same size.

The knob support is fixedly installed, the knob assembly rotates in the operation process, and in the rotation process, the arrangement can ensure that the second annular permanent magnet and the first annular permanent magnet are always in a mutual attraction state, so that the knob assembly is prevented from deviating in the operation process.

According to the induction knob, the distance between the bottom surface of the radial permanent magnet and the upper surface of the Hall element is 10-20 mm.

Through multiple tests, the induction accuracy is sensitive when the distance between the Hall element and the bottom surface of the radial permanent magnet is set to be 10-20 mm.

According to the induction knob of the embodiment of the first aspect of the invention, the distance between the bottom surface of the radial permanent magnet and the upper surface of the hall element is 13 mm.

Through multiple tests, the induction accuracy is the most sensitive when the distance between the Hall element and the bottom surface of the radial permanent magnet is set to be 13 mm.

According to the induction knob, the diameter of the radial permanent magnet is 8-10 mm.

Through many times of tests, when the diameter of the radial permanent magnet is 8-10 mm, the interference of the magnetic field between the two stages of the radial permanent magnet and the interference of the second annular permanent magnet and the first annular permanent magnet are minimum, and at the moment, the setting of the distance between the radial permanent magnet and the Hall element is combined, so that the whole induction precision of the induction knob can be set to be the most accurate.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is an exploded view of a portion of the knob assembly in accordance with an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.