CN112908761B - Non-contact knob device, identification method thereof and electric equipment - Google Patents
Non-contact knob device, identification method thereof and electric equipment Download PDFInfo
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- CN112908761B CN112908761B CN202110024366.2A CN202110024366A CN112908761B CN 112908761 B CN112908761 B CN 112908761B CN 202110024366 A CN202110024366 A CN 202110024366A CN 112908761 B CN112908761 B CN 112908761B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/14—Operating parts, e.g. turn knob
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
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- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
The invention discloses a non-contact knob device, an identification method thereof and electric equipment, wherein the non-contact knob device comprises: the magnetic induction device comprises an isolation component, a knob mechanism, a first magnetic mechanism, a bracket, a second magnetic mechanism and a magnetic induction module; the first magnetic mechanism is fixedly arranged on the knob mechanism; the bracket is provided with a first space, and the second magnetic mechanism is arranged in the first space; the knob mechanism and the bracket are respectively arranged on two sides of the isolation component; when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in the first space; the magnetic induction module is arranged close to the support and can induce the magnetic field change formed by the action of the second magnetic mechanism in the first space. The non-contact knob device, the identification method thereof and the electric equipment provided by the invention can reduce the cost and facilitate the product design.
Description
Technical Field
The invention belongs to the technical field of electronic information, relates to electric equipment, and particularly relates to a non-contact knob device and an identification method thereof.
Background
The knob structure of the traditional potentiometer is generally that a knob is fixed on a panel, the panel is perforated, and a detection part of the knob is connected with a control circuit board below the panel through a lead passing through the perforation. The general magnetic knob has a complex structure, uses a plurality of magnets and causes higher overall cost.
The defects of the prior potentiometer knob mainly comprise: the method comprises the following steps that (1) holes need to be punched in a panel, and the processing difficulty of the panel is increased; (2) Due to the existence of the perforation, the waterproof function of the whole product is difficult to realize; (3) The rotatable part (knob) cannot leave the panel, and the knob position of the panel is difficult to clean; (4) The detection device in the knob has mechanical friction and short service life.
The main disadvantages of the general magnetic knob structure are: (1) the structure is complex, 3 to 4 magnets are used, and even more; (2) The knob cannot be removed from the faceplate or, once removed, cannot be accurately positioned back to the correct position.
In view of the above, there is a need to design a new knob structure to overcome at least some of the above-mentioned disadvantages of the existing knob structures.
Disclosure of Invention
The invention provides a non-contact knob device, an identification method thereof and electric equipment, which can reduce cost and facilitate product design.
In order to solve the technical problem, according to one aspect of the present invention, the following technical solutions are adopted:
a non-contact knob device, comprising: the magnetic induction device comprises an isolation component, a knob mechanism, a first magnetic mechanism, a bracket, a second magnetic mechanism and a magnetic induction module;
the first magnetic mechanism is fixedly arranged on the knob mechanism; the bracket is provided with a first space, and the second magnetic mechanism is arranged in the first space;
the knob mechanism and the bracket can be respectively arranged on two sides of the isolation component; when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in the first space;
the magnetic induction module is arranged close to the support and can induce the magnetic field change formed by the action of the second magnetic mechanism in the first space.
As an embodiment of the present invention, the magnetic induction module can determine a rotation angle of the second magnetic mechanism according to a change of a magnetic field of the second magnetic mechanism, so as to obtain the rotation angle of the knob mechanism.
As an embodiment of the present invention, the depth of the first space is greater than the height of the second magnetic mechanism, so that the second magnetic mechanism generates a height change when being attracted by the first magnetic mechanism.
As an embodiment of the present invention, the insulation member is an insulation panel; the knob mechanism is removably disposed above the insulation panel.
As an embodiment of the present invention, the knob device further includes a rotation amount identification module, connected to the magnetic induction module, for identifying a rotation amount according to a magnetic field variation induced by the magnetic induction module.
As an embodiment of the present invention, the first magnetic mechanism includes at least one pair of symmetrically distributed N-S poles; the first magnetic mechanism is tightly arranged on the knob mechanism, and when the knob mechanism rotates, the first magnetic mechanism rotates by taking the center of the NS boundary line as a rotation center.
In one embodiment of the present invention, the second magnetic means has a gap between its periphery and the first space, and is rotatable on a set plane in the first space.
As an embodiment of the present invention, the magnetic induction module includes at least one of a magnetic encoding chip, a hall, and a magnetic resistance.
According to another aspect of the invention, the following technical scheme is adopted: a powered device, the powered device comprising: the non-contact knob device is provided.
According to another aspect of the invention, the following technical scheme is adopted: an identification method of the non-contact knob device includes:
when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in the first space;
the magnetic induction module induces the magnetic field change formed by the second magnetic mechanism due to the action in the first space;
the rotation amount identification module identifies rotation amount according to the magnetic field change induced by the magnetic induction module.
In one embodiment of the present invention, a first magnetic mechanism is embedded in the knob mechanism, the knob mechanism is placed on the panel or removed from the panel to attract or release a second magnetic mechanism in the panel lower frame 4, and the knob rotates on the panel to drive the second magnetic mechanism in the frame to rotate. When the second magnetic mechanism moves in the vertical direction or rotates in a plane, the magnetic field intensity changes and is detected by the lower magnetic field detection circuit board.
A first magnetic mechanism with symmetrical N-S poles is fixedly embedded in the knob mechanism.
The support is fixed below the isolation panel, a space for enabling the second magnetic mechanism to rotate 360 degrees is formed in the support, the second magnetic mechanism with symmetrical N-S poles is placed in the space, the second magnetic mechanism can freely rotate in the horizontal plane without limitation, but can hardly move left and right or back and forth, a certain moving space is formed in the vertical direction, the second magnetic mechanism can move upwards when being attracted by the first magnetic mechanism and is attached to the lower surface of the isolation panel, and the second magnetic mechanism can fall to the bottom of the support by a certain distance under the influence of gravity after the first magnetic mechanism is moved away.
The invention has the beneficial effects that: the non-contact knob device, the identification method thereof and the electric equipment provided by the invention can reduce the cost and facilitate the product design.
The invention realizes the complete isolation of the rotary part of the knob and the detection part; therefore, the panel is easier to process, clean and waterproof. The rotating part can completely remove the panel, the panel internal detection part can detect whether the knob leaves the panel, and the knob has a positioning function when being placed on the panel. And the whole structure is simple in design, only 2 magnets are used, the cost is low, and the commercial production is facilitated.
The invention can accurately detect the rotation angle of the knob and also realize the complete isolation of the rotation part and the detection part of the knob, so the panel is easier to process, clean and waterproof. The rotating part can completely remove the panel, the panel internal detection part can detect whether the knob leaves the panel or not, and the knob has a positioning function when being placed on the panel. And the whole structure design is simple, only 2 magnets are used, the cost is low, and the commercial production is facilitated.
Drawings
Fig. 1 is a schematic diagram illustrating a non-contact type knob apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a first magnetic mechanism according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a first magnetic mechanism according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the first magnetic mechanism and the knob mechanism according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating the second magnetic mechanism disposed in the bracket according to an embodiment of the invention.
Fig. 6 is a schematic view illustrating a second magnetic mechanism disposed in a bracket according to an embodiment of the invention.
Fig. 7 is a schematic view illustrating the second magnetic mechanism disposed in the bracket according to an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only, and the present invention is not limited only to the scope of the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.
The steps in the embodiments in the specification are only expressed for convenience of description, and the implementation manner of the present application is not limited by the order of implementation of the steps. The term "connected" in the specification includes both direct connection and indirect connection.
Fig. 1 is a schematic diagram illustrating a non-contact type knob device according to an embodiment of the present invention; referring to fig. 1, the non-contact knob apparatus includes: the magnetic control device comprises an isolation component 3, a knob mechanism 1, a first magnetic mechanism 2, a support 4, a second magnetic mechanism 5 and a magnetic induction module 6.
In an embodiment of the present invention, the isolation component 3 may be an isolation panel; the knob mechanism 1 is removably disposed above the insulation panel. In one embodiment, the isolation panel may be disposed horizontally, the bracket 4 may be disposed below the isolation panel, and the knob mechanism 1 may be disposed above the isolation panel.
The first magnetic mechanism 2 is fixedly arranged on the knob mechanism 1; the bracket 4 is provided with a first space 41, and the second magnetic mechanism 5 is arranged in the first space 41. The knob mechanism 1 and the bracket 4 are respectively arranged on two sides of the isolation component 3; when the first magnetic means 2 rotates following the knob means 1, the second magnetic means 5 acts in the first space 41.
The magnetic induction module 6 is disposed close to the bracket 4, and is capable of inducing a change in a magnetic field generated by the second magnetic mechanism 5 operating in the first space 41. In an embodiment of the present invention, the magnetic induction module 6 can determine the rotation angle of the second magnetic mechanism 5 according to the magnetic field variation of the second magnetic mechanism 5, so as to obtain the rotation angle of the knob mechanism 1.
In an embodiment of the present invention, the depth of the first space 41 is greater than the thickness of the second magnetic mechanism 5, so that the second magnetic mechanism 5 generates a height change when being attracted by the first magnetic mechanism 2.
In an embodiment of the present invention, the knob device further includes a rotation amount identification module, connected to the magnetic induction module, for identifying a rotation amount according to a magnetic field variation induced by the magnetic induction module 6.
Fig. 2 and 3 are schematic structural diagrams of a first magnetic mechanism according to an embodiment of the invention; referring to fig. 2 and 3, in an embodiment of the present invention, the first magnetic mechanism 2 includes at least one pair of symmetrically distributed N-S poles.
FIG. 4 is a schematic structural diagram of a first magnetic mechanism and a knob mechanism according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the first magnetic mechanism 2 is closely disposed on the knob mechanism 1, and when the knob mechanism 1 rotates, the first magnetic mechanism 2 rotates with a center of the NS dividing line as a rotation center.
Fig. 5 to 7 are schematic views illustrating a second magnetic mechanism disposed in a bracket according to an embodiment of the present invention; referring to fig. 5 to 7, in an embodiment of the present invention, a gap exists between the periphery of the second magnetic mechanism 5 and the first space 41, and the second magnetic mechanism 5 can rotate on a set plane in the first space 41.
In an embodiment of the present invention, the magnetic induction module includes at least one of a magnetic encoding chip, a hall, and a magnetic resistance.
In one embodiment of the present invention, the dual-magnet non-contact knob device is structured as shown in fig. 1, and includes a rotatable and removable knob mechanism 1 above a waterproof and insulating panel, and various materials such as plastic and glass can be used for the knob mechanism 1, without affecting design performance. The first magnetic mechanism 2 (which may be an N-S magnet) is tightly embedded in the knob mechanism 1, rotates along with the rotation of the knob mechanism 1, and is removed along with the removal of the knob mechanism 1. The bracket 4 is firmly installed below the waterproof insulating isolation panel (the isolation component 3) and provides support for the second magnetic mechanism 5 (which can be an N-S permanent magnet) inside. The height of the inner space of the bracket 4 is slightly larger than the thickness of the second magnetic mechanism 5, and the specific difference size is different according to the difference of the magnetic field intensity of the magnet and the difference of the circuit board magnetic detection device, and can be several millimeters or several centimeters. The space in the horizontal direction in the support 4 can ensure that the second magnetic mechanism 5 rotates 360 degrees in the horizontal direction, a circuit board is stably installed below the support 4, and the circuit board is provided with magnetic field detection devices or chips, including but not limited to magnetic encoding, hall, magnetic resistance and other devices capable of detecting a magnetic field.
The working principle of the double-magnet non-contact knob is as follows: the first magnetic means 2 is embedded tightly in the knob mechanism 1 to form a whole body as a rotatable knob of the product. When the knob is placed above the isolation panel and close to the position of the bracket 4, the first magnetic mechanism 2 and the second magnetic mechanism 5 are mutually attracted through the panel, and because the position of the second magnetic mechanism 5 is fixed by the bracket 4 in a horizontal range and cannot be freely moved, the knob mechanism 1 can be attracted to the position right above the bracket 4 through the panel, thereby realizing the accurate positioning function of the knob. Because the height of the inner space of the bracket 4 is slightly larger than the thickness of the second magnetic mechanism 5, when the first magnetic mechanism 2 and the second magnetic mechanism 5 attract each other, the second magnetic mechanism 5 moves upwards for a certain distance in the vertical direction and is attached below the isolation panel. The distance between the second magnetic mechanism 5 and the magnetic field detection device on the circuit board can be increased, the magnetic field intensity detected by the magnetic field detection device can be reduced, and the control circuit board can sense that the knob is placed on the panel. On the contrary, when the knob moves away from the panel, the second magnetic mechanism 5 falls to the bottom of the bracket 4 under the action of gravity, and the magnetic field detected by the magnetic field detection device on the control circuit board becomes stronger, so that the knob mechanism 1 is sensed to be moved away. When a user rotates the knob, the second magnetic mechanism 5 rotates along with the first magnetic mechanism 2, and the magnetic detection device on the circuit board detects the magnetic field of the second magnetic mechanism 5, so that the angle indicated by the knob mechanism 1 in the horizontal plane is calculated.
The knob mechanism 1 is a structure which can be manually (or electrically) rotated or moved away in the scheme, has different shapes on different products, and is characterized by being capable of rotating around a central shaft. Here, a cylinder is taken as an illustration. The first magnetic mechanism 2 may be a cylinder, a cuboid, or other shapes, and is characterized in that at least one pair of symmetrically distributed N-S poles has a surface magnetic field strength of 100Gs-10000Gs, or more, depending on the thickness of the isolation panel, as shown in fig. 2. The first magnetic mechanism 2 is embedded in the knob mechanism 1, the center of the N-S pole boundary of the first magnetic mechanism 2 is aligned with the rotation center of the knob mechanism 1, and when the knob mechanism 1 rotates within 360 degrees, the N-S first magnetic mechanism 2 rotates with the NS boundary center as the rotation center. The inlaying process can be realized by gluing or inlaying through precise mechanical dimension processing, and only the first magnetic mechanism 2 is ensured to be firmly inlaid in the knob mechanism 1 without relative movement. An example of the installation of the knob mechanism 1 and the first magnetic mechanism 2 is shown in fig. 3.
The support 4 is internally provided with a certain space, a second magnetic mechanism 5 is arranged in the support 4, the support 4 is firmly fixed below the panel and can not move, and the fixed position below the panel corresponds to the position of the knob above the panel. The second magnetic mechanism 5 can be a cylinder, a cuboid or other shapes, and is characterized in that at least one pair of N-S poles are symmetrically distributed, and the surface magnetic field intensity can be 100Gs-10000Gs or even larger, depending on the thickness of the isolation panel. The space inside the bracket 4 ensures that the second magnetic mechanism 5 can rotate 360 degrees in the horizontal direction, and the height is slightly larger than the thickness of the second magnetic mechanism 5 in the vertical direction, so as to form a vertical space as shown in fig. 4. The vertical space can ensure that the second magnetic mechanism 5 can have a certain movement space in the vertical direction, and the specific size is determined by the magnetic field intensity of the magnet and the thickness of the isolation panel. The rotating area covered by the second magnetic mechanism 5 in the 360-degree range is a circle, the diameter product of the circle is slightly smaller than the diameter of the circular space in the bracket 4, and a horizontal space is formed as shown in fig. 4. This horizontal space is to allow the second magnetic means 5 to rotate freely inside the frame 4 without being affected by the friction on the sides of the frame 4, but is made as small as possible, typically 0.5mm or less in size. Fig. 5 is a top view of the bracket 4 and the second magnetic mechanism 5.
The circuit board is fixed in the isolation panel, and a magnetic field detection device is arranged on the circuit board. The magnetic field detection device can generate different electric signals in different magnetic field strengths, and the circuit board or the control device can calculate the rotation angle of the second magnetic mechanism 5 or the distance from the magnetic field detection device according to the different electric signals. The magnetic field detection devices are of many types, including but not limited to magnetically encoded chips, hall, magnetoresistive, etc. The relative position of the magnetic field detection device and the second magnetic mechanism 5 also differs depending on the kind.
The invention also discloses an electric device, which comprises: the non-contact knob device is provided.
The invention further discloses an identification method of the non-contact knob device, which comprises the following steps:
(S1) when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in a first space;
step S2, the magnetic induction module induces the magnetic field change formed by the action of the second magnetic mechanism in the first space;
and (S3) identifying the rotation amount by a rotation amount identification module according to the magnetic field change induced by the magnetic induction module.
In summary, the non-contact knob device, the identification method thereof and the electric device provided by the invention can reduce the cost and facilitate the product design.
The invention realizes the complete isolation of the rotary part of the knob and the detection part; therefore, the panel is easier to process, clean and waterproof. The rotating part can completely remove the panel, the panel internal detection part can detect whether the knob leaves the panel, and the knob has a positioning function when being placed on the panel. And the whole structure is simple in design, only 2 magnets are used, the cost is low, and the commercial production is facilitated.
The invention can accurately detect the rotation angle of the knob and also realize the complete isolation of the rotation part and the detection part of the knob, so the panel is easier to process, clean and waterproof. The rotating part can completely remove the panel, the panel internal detection part can detect whether the knob leaves the panel, and the knob has a positioning function when being placed on the panel. And the whole structure is simple in design, only 2 magnets are used, the cost is low, and the commercial production is facilitated.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be embodied in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (7)
1. A non-contact knob device, comprising: the magnetic induction device comprises an isolation component, a knob mechanism, a first magnetic mechanism, a bracket, a second magnetic mechanism and a magnetic induction module;
the first magnetic mechanism is fixedly arranged on the knob mechanism; the bracket is provided with a first space, and the second magnetic mechanism is arranged in the first space;
the knob mechanism and the bracket are respectively arranged on two sides of the isolation component; when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in the first space;
the magnetic induction module is arranged close to the bracket and can induce the magnetic field change formed by the second magnetic mechanism due to the action in the first space;
the magnetic induction module can judge the rotation angle of the second magnetic mechanism according to the change of the magnetic field of the second magnetic mechanism, so as to obtain the rotation angle of the knob mechanism;
the depth of the first space is greater than the height of the second magnetic mechanism, so that the second magnetic mechanism generates height change when being adsorbed by the first magnetic mechanism;
the periphery of the second magnetic mechanism has a gap with the first space, and the second magnetic mechanism can rotate on a set plane in the first space.
2. The non-contact knob device according to claim 1, wherein:
the isolation component is an isolation panel; the knob mechanism is removably disposed above the insulation panel.
3. The non-contact knob device according to claim 1, wherein:
the knob device further comprises a rotation amount identification module which is connected with the magnetic induction module and used for identifying the rotation amount according to the magnetic field change induced by the magnetic induction module.
4. The non-contact knob device according to claim 1, wherein:
the first magnetic mechanism comprises at least one pair of symmetrically distributed N-S poles; the first magnetic mechanism is tightly arranged on the knob mechanism, and when the knob mechanism rotates, the first magnetic mechanism rotates by taking the center of the NS boundary line as a rotation center.
5. The non-contact knob device according to claim 1, wherein:
the magnetic induction module comprises at least one of a magnetic coding chip, a Hall and a magnetic resistance.
6. An electrical device, comprising: the non-contact knob device of any one of claims 1 to 5.
7. A method for identifying a non-contact knob device according to any one of claims 1 to 5, comprising:
when the first magnetic mechanism rotates along with the knob mechanism, the second magnetic mechanism acts in the first space;
the magnetic induction module induces the magnetic field change formed by the action of the second magnetic mechanism in the first space;
the rotation amount identification module identifies rotation amount according to the magnetic field change induced by the magnetic induction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110024366.2A CN112908761B (en) | 2021-01-08 | 2021-01-08 | Non-contact knob device, identification method thereof and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110024366.2A CN112908761B (en) | 2021-01-08 | 2021-01-08 | Non-contact knob device, identification method thereof and electric equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112908761A CN112908761A (en) | 2021-06-04 |
| CN112908761B true CN112908761B (en) | 2023-04-14 |
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| CN202110024366.2A Active CN112908761B (en) | 2021-01-08 | 2021-01-08 | Non-contact knob device, identification method thereof and electric equipment |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411306A (en) * | 2016-10-13 | 2017-02-15 | 宁波方太厨具有限公司 | Magnetic-induction knob switch |
| CN208013822U (en) * | 2018-08-01 | 2018-10-26 | 广州周立功单片机科技有限公司 | Double identification magnetic rotation buttons |
| CN208673993U (en) * | 2018-10-17 | 2019-03-29 | 中国石化销售有限公司华南分公司 | A kind of non-contact magnetic control switch |
| CN110401435A (en) * | 2019-07-29 | 2019-11-01 | 广东美的厨房电器制造有限公司 | Knob assembly and household electrical appliance |
| CN210922503U (en) * | 2019-12-18 | 2020-07-03 | 深圳市必显科技有限公司 | Magnetic adsorption type knob |
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2021
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