CN210443481U

CN210443481U - Non-contact knob device and electrical equipment

Info

Publication number: CN210443481U
Application number: CN201921434183.2U
Authority: CN
Inventors: 杨华; 龚圆杰; 郑秀谦; 陈春恒; 陈良麟; 肖靖鹏; 贾贵胜; 戴建亮
Original assignee: Shanghai Chunmi Electronics Technology Co Ltd
Current assignee: Chunmi Technology Shanghai Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-01
Anticipated expiration: 2029-08-30

Abstract

The disclosure relates to a non-contact knob device and electrical equipment, and relates to the technical field of machinery. The non-contact knob device comprises a panel, a knob component and a sleeve button component, wherein the knob component and the sleeve button component are respectively positioned on two sides of the panel; the knob assembly comprises a button, a return spring and a first magnet, the first magnet is positioned at the end part of the button close to the panel, and the return spring is positioned between the panel and the button; the sleeve button assembly comprises a Hall switch, and the Hall switch is opposite to the first magnet and is electrically connected with a control circuit board in an external control module; the button is far away from the Hall switch when not pressed and is close to the Hall switch when pressed, so that the Hall switch generates an electric signal according to the sensed magnetic field change of the first magnet and feeds the electric signal back to the control circuit board. According to the technical scheme, the knob switch function can be realized without panel opening, and the invasion of oil smoke and water vapor can be avoided, so that the quality and the service life of electronic devices inside the product are ensured.

Description

Non-contact knob device and electrical equipment

Technical Field

The present disclosure relates to the field of mechanical technology, and in particular, to a non-contact knob device and an electrical apparatus.

Background

At present, a plurality of kitchen electric appliances such as induction cookers, ovens, microwave ovens and the like are available on the market, and the functions of man-machine interaction operation are realized by using knobs. However, in the related art, most knob structures require holes in the machine panel to connect the knob with the encoder inside the machine to realize the interaction function. And have more oil smoke and great steam in the kitchen environment, adopt trompil structure can't effectually stop oil smoke and steam and enter into the product inside from the trompil position, consequently lead to the inside electron device of product to age with higher speed or fault hidden danger such as short circuit appears easily.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, embodiments of the present disclosure provide a non-contact knob device and an electrical apparatus. The technical scheme is as follows:

according to a first aspect of the embodiments of the present disclosure, a non-contact knob device is provided, which includes a panel, a knob assembly and a knob assembly respectively located at two sides of the panel;

the knob assembly comprises a button, a return spring and a first magnet, the first magnet is positioned at the end part of the button close to the panel, and the return spring is positioned between the panel and the button;

the sleeve button assembly comprises a Hall switch, and the Hall switch is opposite to the first magnet and is electrically connected with a control circuit board in an external control module;

the button is far away from the Hall switch when not pressed and is close to the Hall switch when pressed, so that the Hall switch generates an electric signal according to the sensed magnetic field change of the first magnet and feeds the electric signal back to the control circuit board.

In one embodiment, the knob assembly further comprises a knob and a second magnet fixedly connected inside the knob and close to the panel, wherein the projection of the second magnet on the panel surface surrounds the projection of the return spring on the panel surface;

the knob assembly further comprises a knob and a third magnet which is fixedly connected inside the knob and close to the panel, the third magnet is opposite to the second magnet in position, and the knob assembly is further fixedly connected with a rotary encoder in an external control module;

the second magnet and the third magnet are oppositely arranged on two sides of the panel, opposite magnetic poles of the second magnet and opposite magnetic poles of the third magnet are attracted with each other, and therefore the second magnet can rotate to drive the third magnet to rotate.

In one embodiment, the knob assembly further comprises a magnetic shielding sheet located between the third magnet and the hall switch.

In one embodiment, the thickness of the magnetism isolating sheet is greater than or equal to 0.1mm, and the upper end surface and the lower end surface of the magnetism isolating sheet along the vertical direction of the panel both shield the upper end surface and the lower end surface of the third magnet along the vertical direction of the panel.

In one embodiment, the magnetic shield is annular in shape.

In one embodiment, the material of the first, second and third magnets comprises at least one of: neodymium iron boron, aluminum nickel cobalt, samarium cobalt; the material of the magnetism isolating sheet comprises at least one of the following materials: iron, stainless iron, nickel, cobalt.

In one embodiment, the second magnet and the third magnet are both ring magnets;

the surface of the second magnet close to the panel comprises at least one N pole and at least one S pole, and the N pole and the S pole are distributed in an interval way; the surface of the third magnet close to the panel comprises at least one N pole and at least one S pole, and the N pole and the S pole are distributed in an interval way;

and the N pole and the S pole of the second magnet are respectively in opposite attraction with the S pole and the N pole of the third magnet, so that the sleeve button component rotates along with the knob component.

In one embodiment, the second magnet and the third magnet are both cylindrical magnets, and a plurality of independently disposed second magnets and a plurality of independently disposed third magnets are distributed along a ring;

the surface of the second magnet close to the panel is set as one of an N pole and an S pole, and the surface of the third magnet close to the panel is set as the other of the S pole and the N pole;

In one embodiment, a plurality of the second magnets are separated by a preset gap, and a plurality of the third magnets are separated by a preset gap;

the surfaces, close to the panel, of the second magnets are both set to be N poles or both set to be S poles, and the surfaces, close to the panel, of the third magnets are both set to be S poles or both set to be N poles;

or the surface of the second magnet close to the panel is set as one of S pole and N pole, and the surface of the third magnet close to the panel is correspondingly set as the other of S pole and N pole.

In one embodiment, a plurality of the second magnets are arranged without gaps, the polarities of the adjacent two second magnets are different, a plurality of the third magnets are arranged without gaps, and the polarities of the adjacent two third magnets are different;

the surface of the second magnet close to the panel is set as one of S pole and N pole, and the surface of the third magnet close to the panel is correspondingly set as the other of S pole and N pole.

In one embodiment, the inner ring or the outer ring of the second magnet is provided with at least one first opening, the knob is provided with a first limiting rib at a position corresponding to the first opening, and the first limiting rib and the first opening are mutually clamped.

In one embodiment, the inner ring or the outer ring of the third magnet is provided with at least one second opening, the sleeve button is provided with a second limiting rib at a position corresponding to the second opening, and the second limiting rib and the second opening are mutually clamped.

In one embodiment, the knob assembly further comprises a knob gland fixedly connected with the knob, and the knob gland is located between the second magnet and the panel and used for fixing the second magnet in a cavity formed by the knob and the knob gland.

In one embodiment, the knob cover is fixedly combined with the knob through any one of gluing, hot pressing, screws and ultrasonic welding.

In one embodiment, the knob assembly further includes a knob cover fixedly connected to the knob, and the knob cover is located between the third magnet and the panel, for fixing the third magnet in a cavity formed by the knob and the knob cover.

In one embodiment, the knob cover is fixedly coupled to the knob by any one of glue, heat pressing, screws, and ultrasonic welding.

In one embodiment, the non-contact knob apparatus further includes a mounting base, the control circuit board is mounted in the mounting base, and the rotary encoder is fixed in the mounting base and fixed at a predetermined position of the control circuit board.

In one embodiment, the knob assembly further includes a switch bracket for fixing the hall switch, the switch bracket being fixed on a surface of the control circuit board or inside a rotary encoder in the control module.

According to a second aspect of the embodiments of the present disclosure, an electrical apparatus is provided, which includes the non-contact type knob device and the control module described in any one of the embodiments of the first aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the non-contact knob device that this disclosed technical scheme provided, because first magnet and hall switch set up in the both sides of panel relatively, and first magnet can be close to or keep away from hall switch according to the pressurized state of button for hall switch can generate corresponding signal change and feed back to control circuit board according to the magnetic field change that the first magnet that senses produced, thereby realizes the key switch function. Because the technical scheme of the present disclosure does not open a hole in the panel, the opening/closing state of the hall switch is controlled only by means of the magnetic field effect, so that the invasion of oil smoke and water vapor can be effectively avoided, and the quality and the service life of the electronic device in the product can be ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is an exploded view of a non-contact knob device shown in accordance with an exemplary embodiment;

FIG. 2 is an exploded view of a non-contact knob assembly according to an exemplary embodiment;

FIG. 3 is a cross-sectional view of a non-contact knob assembly shown in accordance with an exemplary embodiment;

FIG. 4 is a schematic diagram of a ring magnet provided with openings according to an exemplary embodiment;

FIG. 5 is a schematic diagram illustrating a knob having a spacing rib according to an exemplary embodiment;

FIG. 6 is a schematic diagram illustrating a configuration of a knob with a retention rib according to an exemplary embodiment;

FIG. 7 is an exploded view of a non-contact knob assembly according to an exemplary embodiment;

FIG. 8 is a cross-sectional view of a non-contact knob assembly shown in accordance with an exemplary embodiment;

FIG. 9 is an exploded view of a non-contact knob assembly according to an exemplary embodiment;

FIG. 10 is a cross-sectional view of a non-contact knob assembly shown in accordance with an exemplary embodiment;

FIG. 11 is a perspective view of a non-contact knob assembly shown in accordance with an exemplary embodiment.

Reference numerals:

10-a panel; 20-a knob assembly; 201-a button; 202-a return spring; 203-a first magnet; 204-knob; 2040-a first limiting rib; 205-a second magnet; 2050-first opening; 206-knob gland; 30-a knob assembly; 301-hall switch; 302-a switch bracket; 303-a knob; 3030-second limiting rib; 304-a third magnet; 3040-a second opening; 305-toggle gland; 306-a magnetic separator sheet; 40-a control module; 401-control circuit board; 402-a rotary encoder; 50-mounting a base.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The technical scheme provided by the embodiment of the disclosure relates to a non-contact knob device and electrical equipment adopting the non-contact knob device, in particular to kitchen electrical equipment. In the related art, the kitchen appliances often need to use knobs to implement the human-computer interaction function, and most knob structures need to form holes in the panel of the machine to connect the knobs with the encoder inside the machine so as to implement the interaction function. And have more oil smoke and great steam in the kitchen environment, adopt trompil structure can't effectually stop oil smoke and steam and enter into the product inside from the trompil position, consequently lead to the inside electron device of product to age with higher speed or fault hidden danger such as short circuit appears easily. Based on this, the non-contact knob device that this disclosed technical scheme provided need not to open a hole in the panel, can realize the knob switch function, so can avoid the invasion of oil smoke and steam to ensure the quality and the life-span of the inside electron device of product.

Fig. 1 illustrates an exploded view of a non-contact knob apparatus provided in the technical solution of the present disclosure. As can be seen from fig. 1, the non-contact type knob apparatus includes a panel 10, and a knob assembly 20 and a knob assembly 30 respectively located at two sides of the panel 10; the knob assembly 30 may be connected to the control module 40, and the control module 40 may be an externally connected control device, or may also be a control unit built in the non-contact type knob device, which is not limited in this embodiment.

The knob assembly 20 comprises a button 201, a return spring 202 and a first magnet 203, wherein the first magnet 203 is positioned at the end part of the button 201 close to the panel 10, the return spring 202 is positioned between the panel 10 and the button 201 and is partially sleeved on the periphery of the button 201, and the return spring can extend and retract along the direction vertical to the panel 10;

the toggle assembly 30 comprises a hall switch 301 and a switch bracket 302 for fixing the hall switch 301, the hall switch 301 is opposite to the first magnet 203 and is electrically connected with a control circuit board 401 in the control module 40, and the switch bracket 302 is fixed in the rotary encoder 402 of the control module 40 or on the surface of the control circuit board 401;

the button 201 is far away from the hall switch 301 when not pressed, and is close to the hall switch 301 when pressed, so that the hall switch 301 generates an electric signal according to the sensed magnetic field change of the first magnet 203 and feeds the electric signal back to the control circuit board 401.

In the initial state (i.e., the button 201 is not pressed), the button 201 and the first magnet 203 are located away from the hall switch 301 due to the elastic force of the return spring 202, i.e., the first magnet 203 is located at a relatively long distance from the hall switch 301, and at this time, the hall switch 301 cannot detect the magnetic signal and is kept in the first state, e.g., the open state or the closed state, so that the non-contact type knob apparatus is kept in the unopened state.

In the operating state (i.e., the button 201 is pressed), the button 201 and the first magnet 203 move in a direction close to the hall switch 301 due to the pressing action applied by the user, i.e., the first magnet 203 is closer to the hall switch 301, and at this time, the hall switch 301 can sense the magnetic field strength change and convert the magnetic field change into an electrical signal to be fed back to the control circuit board 401 to switch to the second state, e.g., the closed state or the open state, so that the non-contact type knob device is switched to the open state.

Based on this, in the non-contact knob device provided by the embodiment of the present disclosure, since the first magnet 203 and the hall switch 301 are oppositely disposed on two sides of the panel 10, and the first magnet 203 can be close to or away from the hall switch 301 according to the pressed state of the button 201, so that the hall switch 301 can generate a corresponding signal change according to the sensed magnetic field change generated by the first magnet 203 and feed the signal change back to the control circuit board 401, thereby implementing the key switch function. Because the technical scheme of the present disclosure does not open a hole in the panel 10, and only controls the open/close state of the hall switch 301 by means of the magnetic field effect, the invasion of oil smoke and water vapor can be effectively avoided, thereby ensuring the quality and the service life of the electronic devices inside the product.

It should be noted that: the panel 10 in the present embodiment refers to a panel for installing a knob switch, and is, for example, a control panel of a microwave oven or a control panel of an electric oven, but not limited thereto. Illustratively, the knob assembly 20 is located on one side of the panel 10, for example, facing the outside of the user, to facilitate the user to manually control the button 201, and the knob assembly 30 is located on the other side of the panel 10, for example, facing away from the inside of the user, to enable the first magnet 203 to move up and down under the driving of the button 201, so that the hall switch 301 is cooperatively turned on or off. The knob assembly 30 may be located at an opposite side of the knob assembly 20 and exposed, or the knob assembly 30 may also be located at an opposite side of the knob assembly 20 and covered by the casing, which is not limited in this embodiment.

In order to provide the size adjustment function for the non-contact knob device, the embodiment of the present disclosure further includes a rotation control structure. Specifically, the knob assembly 20 includes a knob 204 and a second magnet 205 fixed inside the knob 204 and connected to the knob 204 and close to the faceplate 10, wherein the projection of the second magnet 205 on the surface of the faceplate 10 surrounds the projection of the return spring 202 on the surface of the faceplate 10; the knob assembly 30 comprises a knob 303 and a third magnet 304 fixed inside the knob 303, connected with the knob 303 and close to the panel 10, wherein the third magnet 304 is opposite to the second magnet 205, that is, the projection of the third magnet 304 on the surface of the panel 10 surrounds the projection of the hall switch 301 on the surface of the panel 10; the control module 40 includes a control circuit board 401 and a rotary encoder 402, the knob assembly 30 is fixedly connected to the rotary encoder 402, and the rotary encoder 402 is electrically connected to the control circuit board 401. The second magnet 205 and the third magnet 304 are oppositely disposed on two sides of the panel 10, and opposite poles of the second magnet 205 and the third magnet 304 are oppositely attracted, so that the rotation of the second magnet 205 can drive the third magnet 304 to rotate therewith, thereby achieving the effect of adjusting the knob 303 by operating the knob 204.

For example, the fixing manner of the second magnet 205 in the knob 204 may be embedded, that is, a first groove is provided in the knob 204, and the second magnet 205 is embedded into the first groove to realize relative fixing of the two; the third magnet 304 may also be fixed in the sleeve button 303 in an embedded manner, that is, a second groove is provided in the sleeve button 303, and the third magnet 304 is embedded in the second groove to realize relative fixation of the two. Of course, the shape and size of the first and second recesses should match the shape and size of the second and

third magnets

205, 304, respectively.

Based on this, in the non-contact knob device provided in the embodiment of the disclosure, since the second magnet 205 and the third magnet 304 are oppositely disposed on two sides of the panel 10 and opposite magnetic poles thereof are oppositely attracted, when the knob 204 controls the second magnet 205 to rotate, the third magnet 304 rotates along with the second magnet by virtue of the attraction effect of the opposite magnetic poles, and further drives the knob 303 to rotate along with the second magnet, so as to implement the function of transmitting the rotation torque, and the knob 303 is fixedly connected to the rotary encoder 402 of the control module 40, so that the rotation amount can be converted into the control signal to be transmitted to the control circuit board 401 of the control module 40, thereby implementing the knob switch function. Because the rotary control structure does not have a hole in the panel 10, the knob assembly 30 is driven to synchronously rotate along with the knob assembly 20 only by means of magnetic force, so that the invasion of oil smoke and water vapor can be effectively avoided, and the quality and the service life of electronic devices in the product are ensured.

Based on the above-mentioned rotation control structure, in an embodiment, as shown in fig. 2 and fig. 3, both the second magnet 205 and the third magnet 304 may adopt a ring structure, for example, both the second magnet 205 and the third magnet 304 may be configured as circular ring magnets, and may also be configured as rectangular ring magnets or elliptical ring magnets, and the like, which is not limited in this embodiment. Based on this, the N pole and the S pole can be arranged along the circumferential direction of the ring magnet on the surface of the second magnet 205/the third magnet 304, so as to drive the third magnet 304 to rotate when controlling the rotation of the second magnet 205, i.e. the N pole rotation of the second magnet 205 drives the S pole of the third magnet 304 to rotate therewith, and the S pole rotation of the second magnet 205 drives the N pole of the third magnet 304 to rotate therewith, thereby achieving the effect of controlling the rotation of the third magnet 304 by means of the second magnet 205.

Illustratively, the second magnet 205 includes two upper and lower surfaces, which are provided with two N poles and two S poles alternately distributed near the lower surface of the panel 10, and two S poles and two N poles alternately distributed corresponding to the upper surface facing away from the panel 10, and the third magnet 304 includes two upper and lower surfaces, which are provided with two S poles and two N poles alternately distributed near the upper surface of the panel 10, and two N poles and two S poles alternately distributed corresponding to the lower surface facing away from the panel 10. The lower surface of the second magnet 205 and the upper surface of the third magnet 304 are oppositely disposed and attracted in an aligned manner, so that the knob assembly 30 can rotate along with the knob assembly 20 under the driving of the magnetic force. Of course, this is merely an exemplary illustration, the structure of the second magnet 205 and the third magnet 304 is not limited to this, and the entire magnets may be arranged with N poles and S poles alternately along the circumferential direction, that is, the upper and lower surfaces are not distinguished, or one or more pairs of N poles/S poles may be included, as long as the N pole and S pole of the second magnet 205 are respectively attracted to the S pole and N pole of the third magnet 304 in an aligned manner, and the others are not particularly limited.

Specifically, in the present embodiment, the second magnet 205 and the third magnet 304 may be both configured as annular magnets, and a plurality of N poles and S poles arranged at intervals are distributed on the surface of the annular magnet close to the panel 10, that is, the annular magnet has a multi-pole structure, the N pole of the lower surface of the second magnet 205 is opposite to the S pole of the upper surface of the third magnet 304, and the S pole of the lower surface of the second magnet 205 is opposite to the N pole of the upper surface of the third magnet 304, so that a structure in which the second magnet 205 and the third magnet 304 are aligned and attracted is formed, and when the second magnet 205 rotates, the third magnet 304 can be driven to rotate along with the second magnet, thereby achieving the function of rotation adjustment.

Based on this, because the surface of the ring magnet is alternately distributed with a plurality of N poles and a plurality of S poles, the relative arrangement of the second magnet 205 and the third magnet 304 can ensure the automatic alignment attraction of the knob assembly 20 and the knob assembly 30, and the adoption of the multi-magnetic pole structure can further ensure that when the knob assembly 20 is controlled to rotate, the opposite magnetic poles of the corresponding third magnet 304 in the knob assembly 30 can closely follow the rotation due to the change of the magnetic pole position of the second magnet 205 in the knob assembly 20, thereby reducing the action delay.

On the basis, the problem that the annular magnet can slide relative to the inside of the knob 204/sleeve knob 303 when the annular magnet rotates along the circumferential direction is considered, so that the phenomenon that the annular magnet rotates and the knob 204/sleeve knob 303 does not rotate is caused, and the torque cannot be transmitted in time. Based on this, the embodiment of the present disclosure adds an anti-slip structure between the ring magnet and the knob 204/sleeve 303, and fig. 4 to 6 are schematic diagrams illustrating the anti-slip structure. On one hand, referring to fig. 4 and 5, in the embodiment of the disclosure, at least one first opening 2050 may be disposed on an inner ring or an outer ring of the second magnet 205, and a first limiting rib 2040 is disposed at a position of the knob 204 corresponding to the first opening 2050, and the first limiting rib 2040 and the first opening 2050 are engaged with each other, so as to prevent the knob 204 and the second magnet 205 from sliding relatively. On the other hand, referring to fig. 4 and fig. 6, in the embodiment of the disclosure, at least one second opening 3040 may be further disposed on an inner ring or an outer ring of the third magnet 304, and a second limiting rib 3030 is disposed at a position of the knob 303 corresponding to the second opening 3040, and the second limiting rib 3030 and the second opening 3040 are engaged with each other, so as to prevent the knob 303 and the third magnet 304 from sliding relatively.

Therefore, in the embodiment of the present disclosure, the opening may be disposed on the inner ring or the outer ring of the annular magnet, and the limiting rib is disposed at the corresponding position of the knob 204/sleeve button 303, so that the annular magnet and the knob 204/sleeve button 303 are prevented from sliding circumferentially relative to each other in the rotation process by the mutual cooperation of the opening and the limiting rib, and the torque can be timely transmitted in place, thereby ensuring that the rotary encoder 402 has good following performance.

Based on the above-mentioned rotation control structure, in another embodiment, as shown in fig. 7 and 8, the second magnet 205 and the third magnet 304 may both be cylindrical structures, for example, the second magnet 205 and the third magnet 304 may both be cylindrical magnets, and may also be prismatic magnets, which is not limited in this embodiment. Based on this, the plurality of second magnets 205 and the plurality of third magnets 304 may be arranged in a ring shape, so that the third magnets 304 can be driven to rotate when the second magnets 205 are controlled to rotate, thereby achieving the effect of controlling the third magnets 304 to rotate by means of the second magnets 205.

Optionally, the second magnets 205 are separated by a predetermined gap, the third magnets 304 are separated by a predetermined gap, the surfaces of the second magnets 205 close to the panel 10 are all set to the same first polarity, for example, are all set to N-pole or are all set to S-pole, the surfaces of the third magnets 304 close to the panel 10 are all set to the same second polarity, for example, are all set to S-pole or are all set to N-pole, and the first polarity and the second polarity are opposite polarities. The gaps between adjacent magnets may be the same or different, and this embodiment is not particularly limited to this, and it is only necessary to ensure that the positions of the paired second magnets 205 and the paired third magnets 304 correspond to each other.

For example, a plurality of, for example, at least two second magnets 205 are arranged in the same manner, and adjacent second magnets 205 are spaced by a certain gap, each second magnet 205 includes an upper surface and a lower surface, and the lower surface close to the panel 10 can be set as an N pole, and the upper surface away from the panel 10 is set as an S pole; a plurality of, for example, at least two third magnets 304 are arranged in the same manner, and a gap is formed between adjacent third magnets 304, and each third magnet 304 includes an upper surface and a lower surface, and the upper surface close to the panel 10 is set as an S pole, and the lower surface away from the panel 10 is set as an N pole. Of course, here is only an exemplary illustration, the second magnet 205 and the third magnet 304 may also be simultaneously set to opposite polarities, i.e., the lower surface of the second magnet 205 is set to S-pole, and the upper surface of the third magnet 304 is set to N-pole. Based on this, the lower surface of the second magnet 205 is opposite to the upper surface of the third magnet 304 and is aligned and attracted, so that the knob assembly 30 can rotate along with the knob assembly 20 under the driving of the magnetic force.

Optionally, the second magnets 205 are separated by a predetermined gap, the third magnets 304 are separated by a predetermined gap, the surface of the second magnet 205 close to the panel 10 is set to be of any one of the first polarity and the second polarity, for example, any one of the S pole and the N pole, the surface of the third magnet 304 close to the panel 10 is correspondingly set to be of the other one of the first polarity and the second polarity, for example, the other one of the S pole and the N pole, and the first polarity and the second polarity are opposite polarities. The gaps between adjacent magnets may be the same or different, and this embodiment is not particularly limited to this, and it is only necessary to ensure that the positions of the paired second magnets 205 and the paired third magnets 304 correspond to each other.

Illustratively, a plurality of, for example, at least two second magnets 205 are arranged in different manners, and adjacent second magnets 205 are spaced by a certain gap, each second magnet 205 includes an upper surface and a lower surface, some of the second magnets 205 are arranged as N-poles on the lower surface close to the panel 10 and are arranged as S-poles on the upper surface away from the panel 10, and the rest of the second magnets 205 are arranged as S-poles on the lower surface close to the panel 10 and are arranged as N-poles on the upper surface away from the panel 10; a plurality of, for example, at least two third magnets 304 are disposed in different manners and a certain gap is formed between adjacent third magnets 304, each third magnet 304 includes an upper surface and a lower surface, some of the third magnets 304 are disposed near the upper surface of the panel 10 as an S-pole, and the lower surface facing away from the panel 10 is disposed as an N-pole, and the rest of the third magnets 304 are disposed near the upper surface of the panel 10 as an N-pole, and the lower surface facing away from the panel 10 is disposed as an S-pole. Of course, this is merely an exemplary illustration, and the second magnet 205 and the third magnet 304 may also be set to have opposite polarities at the same time, which is not described herein again. Based on this, the lower surface of the second magnet 205 is opposite to the upper surface of the third magnet 304 and is aligned and attracted, so that the knob assembly 30 can rotate along with the knob assembly 20 under the driving of the magnetic force.

Alternatively, there is no gap between the second magnets 205, there is no gap between the third magnets 304, the surface of the second magnet 205 close to the panel 10 is set to be any one of the first polarity and the second polarity, such as the S pole and the N pole, the surface of the third magnet 304 close to the panel 10 is correspondingly set to be the other one of the first polarity and the second polarity, such as the S pole and the N pole, and the polarities of two adjacent second magnets 205 and the polarities of two adjacent third magnets 304 are different. The adjacent magnets may be partially or completely in contact with each other, which is not specifically limited in this embodiment, and it is only necessary to ensure that the positions of the paired second magnets 205 and the paired third magnets 304 correspond to each other.

Illustratively, a plurality of, for example, at least two second magnets 205 are arranged in different manners and arranged without a gap between adjacent second magnets 205, each second magnet 205 includes an upper surface and a lower surface, and with any one position as a starting point, the lower surface of the odd-numbered second magnet 205 close to the panel 10 is set as an N pole, the upper surface of the odd-numbered second magnet 205 away from the panel 10 is set as an S pole, the lower surface of the even-numbered second magnet 205 close to the panel 10 is set as an S pole, and the upper surface of the even-numbered second magnet 205 away from the panel 10 is set as an N pole; a plurality of, for example, at least two third magnets 304 are disposed in different manners and arranged without a gap between adjacent third magnets 304, each third magnet 304 includes an upper surface and a lower surface, and the starting point of the second magnet 205 is taken as the starting point, the upper surface of the odd-numbered third magnet 304 close to the panel 10 is set as an S pole, the lower surface of the odd-numbered third magnet 304 away from the panel 10 is set as an N pole, the upper surface of the even-numbered third magnet 304 close to the panel 10 is set as an N pole, and the lower surface of the even-numbered third magnet 304 away from the panel 10 is set as an S pole. Of course, this is merely an exemplary illustration, and the second magnet 205 and the third magnet 304 may also be set to have opposite polarities at the same time, which is not described herein again. It should be noted that: the number of the second magnet 205/the third magnet 304 in the present embodiment may be set to an even number, so as to avoid the problem that the adjacent magnets can only be set to the same polarity when they are arranged in a ring shape. Based on this, the lower surface of the second magnet 205 is opposite to the upper surface of the third magnet 304 and is aligned and attracted, so that the knob assembly 30 can rotate along with the knob assembly 20 under the driving of the magnetic force.

Based on this, since the lower surfaces of the plurality of cylindrical second magnets 205 and the upper surfaces of the plurality of cylindrical third magnets 304 are respectively configured as the N-pole and the S-pole in pairs, the relative arrangement of the second magnets 205 and the third magnets 304 can ensure the automatic alignment and attraction of the knob assembly 20 and the knob assembly 30, and the annular structure formed by the plurality of magnets can further ensure that the opposite poles of the corresponding third magnets 304 in the knob assembly 30 closely follow the rotation due to the change of the pole position of the second magnets 205 in the knob assembly 20 when the knob assembly 20 is controlled to rotate, thereby reducing the action delay.

Considering that when the second magnets 205/the third magnets 304 are arranged in a ring shape without gaps, the second magnets 205/the third magnets are easy to slide relative to the inside of the knob 204/the sleeve 303 when rotating in the circumferential direction, so that the phenomenon that the magnets rotate but the knob 204/the sleeve 303 does not rotate is caused, and the torque transmission cannot be timely achieved. Based on this, embodiments of the present disclosure may add an anti-slip structure between the second plurality of magnets 205/third plurality of magnets 304 and the knob 204/knob 303. Fig. 4 to 6 schematically show the anti-slip structure. On one hand, referring to fig. 4 and 5, in the embodiment of the disclosure, at least one first opening 2050 may be disposed on an inner ring or an outer ring of the plurality of second magnets 205, and a first limiting rib 2040 is disposed at a position of the knob 204 corresponding to the first opening 2050, and the first limiting rib 2040 and the first opening 2050 are engaged with each other, so as to prevent the knob 204 and the plurality of second magnets 205 from sliding relatively. On the other hand, referring to fig. 4 and fig. 6, in the embodiment of the disclosure, at least one second opening 3040 may be disposed on an inner ring or an outer ring of the plurality of third magnets 304, and a second limiting rib 3030 is disposed at a position of the knob 303 corresponding to the second opening 3040, and the second limiting rib 3030 and the second opening 3040 are engaged with each other, so as to prevent the knob 303 and the plurality of third magnets 304 from sliding relatively.

In this way, the embodiment of the present disclosure may provide an opening in the annular structure formed by the plurality of second magnets 205/the plurality of third magnets 304, and provide a limiting rib at a corresponding position of the knob 204/the knob 303, and prevent the annular structure formed by the plurality of cylindrical magnets and the knob 204/the knob 303 from sliding circumferentially relative to each other in the rotation process through the mutual cooperation between the opening and the limiting rib, so that the torque can be transmitted in place in time, thereby ensuring that the rotary encoder 402 has good following performance.

Considering that the third magnet 304 and the hall switch 301 are both located inside the knob 303, in order to avoid the magnetic field of the third magnet 304 from affecting the hall switch 301, the embodiment of the present disclosure may further provide a magnetism isolating sheet 306 between the third magnet 304 and the hall switch 301, so as to isolate the third magnet 304 and the hall switch 301 in a parallel direction of the faceplate 10, i.e., a horizontal direction. Specifically, as shown with reference to fig. 9 and 10, the magnetism isolating sheet 306 may be provided in a ring shape so as to isolate the third magnet 304 in the circumferential direction. In order to ensure a good magnetic isolation effect, in this embodiment, the thickness of the magnetic isolation sheet 306 is greater than or equal to 0.1mm, and the upper and lower end surfaces of the magnetic isolation sheet 306 in the vertical direction of the panel 10 can shield the upper and lower end surfaces of the third magnet 304 in the vertical direction of the panel 10, and preferably, the upper and lower end surfaces of the magnetic isolation sheet 306 exceed the upper and lower end surfaces of the third magnet 304 by at least 1mm, so that the influence of the third magnet 304 on the hall switch 301 can be better prevented, and the magnetic field effect of the first magnet 203 on the hall switch 301 is interfered to generate a malfunction when the button 201 is pressed. Fig. 9 and 10 are only illustrated by taking the second magnet 205 and the third magnet 304 as ring magnets as examples, but it should be understood that the magnetic shielding sheet 306 in the present embodiment is still applicable when the second magnet 205 and the third magnet 304 are cylindrical magnets, and the description thereof is omitted here.

In an embodiment of the present disclosure, the materials of the first magnet 203, the second magnet 205, and the third magnet 304 may each adopt at least one of the following: neodymium iron boron, aluminum nickel cobalt, samarium cobalt. Here, neodymium iron boron is taken as an example, and the type of neodymium iron boron N40 may be specifically selected in this embodiment, but not limited thereto. In addition, the material of the magnetic shielding sheet 306 may be iron, stainless iron, nickel, cobalt, and other ferromagnetic materials, and is not limited thereto.

The following provides a detailed description of the non-contact knob device according to the present disclosure. Fig. 9 is a sectional view of the non-contact knob apparatus, fig. 10 is an exploded view of the non-contact knob apparatus, and fig. 11 is a perspective view of the non-contact knob apparatus. Specifically, the non-contact knob apparatus includes a panel 10, a knob assembly 20 and a knob assembly 30 respectively located at both sides of the panel 10, a control module 40 connected to the knob assembly 30, and a mounting base 50 located at the bottom of the control module 40. The control module 40 may be an externally connected control device, but may also be a built-in control unit, which is determined according to actual design.

The knob assembly 20 comprises a knob 204, a button 201, a return spring 202 and a first magnet 203 fixed inside the knob 204, a second magnet 205 fixedly connected inside the knob 204 and close to the faceplate 10, and a knob gland 206 located between the second magnet 205 and the faceplate 10 for fixing the second magnet 205; the projection of the button 201, the return spring 202 and the first magnet 203 on the surface of the panel 10 is located inside the projection of the second magnet 205 on the surface of the panel 10, the first magnet 203 is located at the end of the button 201 close to the surface of the panel 10, the return spring 202 is located between the panel 10 and the button 201 and partially sleeved on the periphery of the button 201 and abutted by the protrusion on the surface of the button 201, so that other parts of the spring extend to the panel 10 beyond the button 201, can extend and retract along the direction perpendicular to the panel 10, and a gland can be arranged between the return spring 202 and the panel 10. The knob cover 206 may be bonded to the knob 204 by gluing, heat pressing, screwing, or ultrasonic welding to secure the second magnet 205 inside the chamber formed by the knob 204 and the knob cover 206. The second magnet 205 may be a ring magnet, a first opening 2050 is formed in an inner ring or an outer ring of the ring magnet, a first limiting rib 2040 is formed in a position of the knob 204 corresponding to the first opening 2050, and the first opening 2050 and the first limiting rib 2040 are engaged with each other to prevent the knob 204 and the second magnet 205 from sliding relatively. The second magnet 205 is alternately provided with two N poles and two S poles on the surface close to the panel 10, but may be provided in a multi-pole structure with more pairs of N poles and S poles.

The knob assembly 30 comprises a knob 303, a hall switch 301 which is fixed in the knob 303 and is opposite to the first magnet 203, a switch bracket 302 which is connected with the hall switch 301 and is used for fixing the hall switch 301, a third magnet 304 which is fixedly connected in the knob 303 and is close to the panel 10, a magnetic separation sheet 306 which is positioned between the hall switch 301 and the third magnet 304 and has the thickness of more than 1mm, and a knob cover 305 which is positioned between the third magnet 304 and the panel 10 and is used for fixing the third magnet 304; the third magnet 304 and the second magnet 205 are disposed on two sides of the panel 10, the hall switch 301 is electrically connected to the control circuit board 401 of the control module 40, and the switch bracket 302 is fixed inside the rotary encoder 402 of the control module 40 or on the surface of the control circuit board 401. The knob cover 305 may be combined with the knob 303 by gluing, hot pressing, screwing, or ultrasonic welding, etc. to fix the third magnet 304 inside the chamber formed by the knob 303 and the knob cover 305. The third magnet 304 may be a circular magnet, a second opening 3040 is formed in an inner ring or an outer ring of the circular magnet, a second limiting rib 3030 is formed in a position of the knob 303 corresponding to the second opening 3040, and the second opening 3040 and the second limiting rib 3030 are engaged with each other to prevent the knob 303 and the third magnet 304 from sliding relatively. The third magnet 304 has two N poles and two S poles alternately arranged on the surface close to the panel 10, but may have a multi-pole structure with more pairs of N poles and S poles.

The control module 40 includes a rotary encoder 402 and a control Circuit Board 401, the rotary encoder 402 is fixedly connected to the knob assembly 30 and electrically connected to the control Circuit Board 401, the hall switch 301 is electrically connected to the control Circuit Board 401, and the control Circuit Board 401 may be a Printed Circuit Board (PCB); wherein, the rotary encoder 402 is fixed in the mounting base 50 and soldered or plugged in a predetermined position of the PCB, the knob assembly 30 is plugged in the rotary encoder 402, and the switch bracket 302 is fixed in the rotary encoder 402 or on the surface of the control circuit board 401.

It should be noted that: in the above embodiment, the second magnet 205 and the third magnet 304 may be ring magnets, or a plurality of cylindrical magnets may be arranged along a ring, which is not limited herein, as long as it is ensured that the third magnet 304 and the second magnet 205 are aligned and attracted to each other and rotate with each other.

Based on the above embodiment, the embodiment of the present disclosure further provides an electrical apparatus, including a non-contact type knob device externally connected with a control module or a non-contact type knob device internally provided with a control module. The electrical equipment is particularly suitable for kitchen electrical equipment, and can avoid oil smoke and water vapor from invading the interior of a product, thereby ensuring the quality and the service life of electronic devices in the product and avoiding the hidden troubles of short circuit and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited only by the attached claims.

Claims

1. A non-contact knob device is characterized by comprising a panel, a knob component and a sleeve button component, wherein the knob component and the sleeve button component are respectively positioned on two sides of the panel;

2. The non-contact knob device according to claim 1, wherein the knob assembly further comprises a knob and a second magnet fixedly attached inside the knob and adjacent to the faceplate, a projection of the second magnet on the faceplate surface surrounding a projection of the return spring on the faceplate surface;

3. The non-contact knob device according to claim 2, wherein the knob assembly further comprises a magnetic shielding sheet located between the third magnet and the hall switch.

4. The non-contact knob device according to claim 3, wherein the magnetic-shielding sheet has a thickness of 0.1mm or more, and both upper and lower end surfaces of the magnetic-shielding sheet in the vertical direction of the panel shield upper and lower end surfaces of the third magnet in the vertical direction of the panel.

5. The non-contact knob device according to claim 3, wherein the magnetic shielding sheet has a ring shape.

6. The non-contact knob device according to claim 3, wherein the material of the first magnet, the second magnet and the third magnet comprises at least one of: neodymium iron boron, aluminum nickel cobalt, samarium cobalt; the material of the magnetism isolating sheet comprises at least one of the following materials: iron, stainless iron, nickel, cobalt.

7. The non-contact knob device according to claim 2, wherein the second magnet and the third magnet are both ring magnets;

8. The non-contact knob device according to claim 2, wherein the second magnet and the third magnet are both cylindrical magnets, and a plurality of the independently disposed second magnets and a plurality of the independently disposed third magnets are distributed along a ring;

9. The non-contact knob device according to claim 8, wherein a plurality of the second magnets are spaced apart by a predetermined gap, and a plurality of the third magnets are spaced apart by a predetermined gap;

10. The non-contact knob device according to claim 8, wherein a plurality of second magnets are disposed without a gap therebetween and have different polarities between adjacent two of the second magnets, and a plurality of third magnets are disposed without a gap therebetween and have different polarities between adjacent two of the third magnets;

11. The non-contact knob device according to claim 7 or 10, wherein the inner ring or the outer ring of the second magnet has at least one first opening, the knob has a first limiting rib at a position corresponding to the first opening, and the first limiting rib and the first opening are engaged with each other.

12. The non-contact knob device according to claim 7 or 10, wherein the inner ring or the outer ring of the third magnet has at least one second opening, the knob has a second limiting rib at a position corresponding to the second opening, and the second limiting rib and the second opening are engaged with each other.

13. The non-contact knob device according to claim 2, wherein the knob assembly further comprises a knob gland fixedly coupled to the knob, the knob gland being located between the second magnet and the faceplate for securing the second magnet within the chamber formed by the knob and the knob gland.

14. The non-contact knob assembly according to claim 2, wherein the knob assembly further comprises a knob cover fixedly coupled to the knob, the knob cover being disposed between the third magnet and the faceplate for securing the third magnet within a chamber formed by the knob and the knob cover.

15. The non-contact knob device according to claim 2, further comprising a mounting base in which the control circuit board is mounted, wherein the rotary encoder is fixed in the mounting base and at a predetermined position of the control circuit board.

16. The non-contact knob assembly according to claim 1, wherein the knob assembly further comprises a switch bracket for fixing the hall switch, the switch bracket being fixed on a surface of the control circuit board or inside a rotary encoder in the control module.

17. An electrical device comprising the non-contact knob apparatus of any one of claims 1-16 and the control module.