Composite magnetizing knob switch

Abstract

The invention discloses a composite magnetizing knob switch, which relates to the technical field of automobile switches, and is characterized in that a fixing assembly comprises a supporting part, an iron ring and a main circuit board, and is kept immovable during use; the rotating assembly comprises a knob and a magnetic ring which are relatively fixed in the circumferential direction, the magnetic ring adopts a sectional type composite magnetizing mode, magnetic poles in two directions are formed after magnetizing, when the magnetic ring rotates, a torque magnetic pole is matched with an iron ring to generate rotating torque, hand feeling feedback is provided for rotation, and a Hall magnetic pole is matched with a Hall sensor to achieve gear triggering; and a rotating switching function is realized. The hand feeling feedback is realized by a structure without direct contact, so that abrasion caused by long-term use can be avoided, and the hand feeling of knob rotation operation can be improved; the hand feeling feedback and the signal triggering are realized through the magnetic pole of one magnetic ring, and the signal triggering structure is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of automobile switches, and further to a composite magnetized knob switch. Background Art

[0002] Knob switches are generally arranged on the car's center console or sub-instrument panel. They are generally used to control the car's air-conditioning system, entertainment system, etc. They can also be used in combination with multimedia display screens to achieve a variety of rich functions.

[0003] In the prior art, contact-type mechanical structures are commonly used, such as using metal springs to contact plastic curved blocks to produce a rotating operating feel, which often results in a fuzzy feel and high noise. Moreover, after long-term use, the contact surface will experience varying degrees of mechanical wear, which will lead to a decay of the operating force and poor user experience, causing customer complaints. In addition, in the prior art, the switch signal of the knob is usually realized by a system composed of plastic blades, grating sensors, etc., which is generally relatively independent of the operating feel system. Therefore, the switch integrates two functional systems, which often requires a larger layout space.

[0004] At present, in response to the above technical problems, how to improve the feel of the knob rotation operation and simplify the signal trigger structure are technical problems that technical personnel in this field need to solve. Summary of the invention

[0005] The core of the present invention is to provide a composite magnetized knob switch, which uses non-contact magnetic force to generate torque and improve the feel of knob rotation operation; a magnetic ring is used to provide torque and signal trigger at the same time, simplifying the signal trigger structure. The specific scheme is as follows:

[0006] A composite magnetized knob switch, comprising a fixed component and a rotating component;

[0007] The fixing assembly comprises a supporting part, an iron ring, and a main circuit board. The iron ring is fixedly assembled on the supporting part in a circumferential direction, the main circuit board is assembled on the supporting part, and a Hall sensor is installed on the main circuit board.

[0008] The rotating assembly includes a knob and a magnetic ring which are relatively fixed in the circumferential direction. The magnetic ring is installed inside the knob. The magnetic ring adopts a segmented composite magnetization method. After magnetization, two directional magnetic poles are formed, which are divided into a plurality of torque magnetic poles and a plurality of Hall magnetic poles according to their functions.

[0009] Among them, when the magnetic ring rotates, the torque magnetic pole cooperates with the iron ring to generate a rotational torque, and the Hall magnetic pole cooperates with the Hall sensor to realize gear triggering.

[0010] Optionally, the magnetic ring is sleeved on the outer circumference of the iron ring, and the torque poles are arranged radially.

[0011] Optionally, the iron ring includes a supporting arc and a protrusion, and a plurality of the protrusions protrude from a side wall of the supporting arc;

[0012] The supporting arc is a complete circular ring or an even number of circular arc segments.

[0013] Optionally, the magnetic ring is a complete cylindrical structure, and the inner surface and outer surface of the magnetic ring are smooth cylindrical surfaces.

[0014] Optionally, the Hall sensor is axially opposite to the magnetic ring, and the Hall magnetic poles are distributed along the axial direction;

[0015] Alternatively, the Hall sensor is located on the side of the magnetic ring, and the Hall magnetic poles are distributed radially.

[0016] Optionally, the magnetic ring adopts a Halbach array magnetization method so that the magnetic ring generates a unidirectional magnetic field in the radial and axial directions.

[0017] Optionally, the rotating shaft of the rotating assembly is perpendicular to the main circuit board;

[0018] One end of the knob is exposed from the support portion for being turned; the exposed portion of the knob is provided with a pattern for increasing friction.

[0019] Optionally, the supporting part includes a bottom shell, a base, and a dust cover that are relatively fixedly assembled; the main circuit board is installed on the bottom shell, and the base is provided with a bracket for installing the iron ring; the rotating assembly can rotate circumferentially relative to the base; the dust cover is provided above the base, and the outer periphery of the knob is provided with a retaining edge for covering the dust cover.

[0020] Optionally, a touch display component is installed on the fixed component, and the touch display component includes a display screen and / or buttons, and the control display area of ​​the display screen and / or buttons is surrounded by the knob.

[0021] Optionally, the touch display assembly includes a lower shell, an upper shell, and an auxiliary circuit board; the auxiliary circuit board is arranged in an inner cavity of the lower shell and the upper shell that are snap-fitted and assembled.

[0022] Compared with the prior art, the present invention provides a composite magnetized knob switch, wherein the fixed component includes a support part, an iron ring, and a main circuit board, which remain fixed when in use; the rotating component includes a knob and a magnetic ring that are relatively fixed in the circumferential direction, and the magnetic ring adopts a segmented composite magnetization method, and two directional magnetic poles are formed after magnetization. When the magnetic ring rotates, the torque magnetic pole cooperates with the iron ring to generate a rotation torque, providing tactile feedback for the rotation, and the Hall magnetic pole cooperates with the Hall sensor to realize the gear triggering and realize the function of rotation switching. Since the tactile feedback is realized by a structure without direct contact, it can avoid wear caused by long-term use, which helps to improve the feel of the knob rotation operation; the tactile feedback and signal triggering are both realized through the magnetic pole of a magnetic ring, simplifying the signal triggering structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 An exploded view of a specific embodiment of the composite magnetized knob switch of the present invention;

[0025] Figure 2 It is an axonometric diagram of a specific embodiment of the composite magnetized knob switch of the present invention;

[0026] Figure 3 for Figure 2 Axonometric section of

[0027] Figure 4 It is an axonometric diagram of another specific embodiment of the composite magnetized knob switch of the present invention;

[0028] Figure 5 for Figure 4 Axonometric section of

[0029] Figure 6 This is a schematic diagram of the coordination of the iron ring, magnetic ring, and Hall sensor;

[0030] Figure 7 It is a top view of the iron ring and the magnetic ring;

[0031] Figure 8 Schematic diagram of the torque magnetic pole and Hall magnetic pole directions of the magnetic ring;

[0032] Fig. 9 This is a top view of the torque pole of the magnetic ring.

[0033] The figure includes:

[0034] Fixed component 1, support part 11, bottom shell 111, base 112, dust cover 113, bracket 114, iron ring 12, support arc 121, bump 122, main circuit board 13, Hall sensor 131, screw 14;

[0035] Rotating component 2, knob 21, retaining edge 211, magnetic ring 22;

[0036] Touch display component 3, display screen 31, button 32, lower shell 33, upper shell 34, auxiliary circuit board 35. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the composite magnetized knob switch of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] The present invention provides a composite magnetized knob switch, combined with Figure 1 , Figure 2 As shown, it includes a fixed component 1 and a rotating component 2. After being assembled in place, the fixed component 1 remains fixed, and the rotating component 2 can rotate relative to the fixed component 1.

[0039] The fixing assembly 1 includes a support portion 11, an iron ring 12, and a main circuit board 13. The support portion 11 is the main structure of the overall fixing assembly 1. The iron ring 12 is fixedly assembled to the support portion 11 in the circumferential direction. The iron ring 12 and the support portion 11 remain relatively fixed in the circumferential direction. The main circuit board 13 is assembled to the support portion 11. A Hall sensor 131 is installed on the main circuit board 13. The Hall sensor 131 is used to detect the rotation angle of the magnetic ring 22.

[0040] The rotating assembly 2 includes a knob 21 and a magnetic ring 22 which are relatively fixed in the circumferential direction. The magnetic ring body is made of isotropic permanent magnetic material. The knob 21 is used for the operator to control the rotation. The knob 21 and the magnetic ring 22 are relatively fixed, and the magnetic ring 22 rotates synchronously with the knob 21. The magnetic ring 22 is installed inside the knob 21. The magnetic ring 22 adopts a segmented composite magnetization method. After magnetization, the magnetic ring 22 forms two directional magnetic poles, which are divided into a number of torque magnetic poles and a number of Hall magnetic poles according to their functions. The torque magnetic pole provides the rotary operation torque and operating feel for the knob switch, and the Hall magnetic pole provides the rotary switch signal for the knob switch.

[0041] Combination Figure 8 , Fig. 9 As shown, the torque pole A is radially arranged, the Hall pole B is axially arranged, and the directions of the torque pole A and the Hall pole B are perpendicular to each other. The torque pole A is oriented toward the iron ring 12, and the Hall pole B is oriented toward the Hall sensor 131. The directions of the torque pole A and the Hall pole B are perpendicular to each other, one of the poles is axially arranged, and the other pole is radially arranged.

[0042] After the magnetization of the magnetic ring 22 of the present invention is completed, the magnetic ring 22 forms a plurality of torque poles A and a plurality of Hall poles B. Each torque pole A can be magnetically attracted to the iron ring 12 to generate magnetic force. It is necessary for the outside world to apply a certain torque to the knob 21 so as to drive the magnetic ring 22 to overcome the magnetic force and rotate. When no torque is applied from the outside world, the magnetic ring 22 and the iron ring 12 are magnetically attracted to each other and remain stationary. There is no direct contact between the magnetic ring 22 and the iron ring 12. There is a circumferential spacing between the two. The torque required for rotation is provided by the magnetic attraction force to form a twisting feel. The hand feel feedback is clear, which can avoid blurred hand feel and increased noise caused by long-term wear and tear.

[0043] When the magnetic ring 22 rotates, the torque magnetic pole cooperates with the iron ring 12 to generate a rotation torque, forming a rotation feel, which can provide the user with tactile feedback of the rotation angle. The Hall magnetic pole cooperates with the Hall sensor 131 to realize the gear trigger. The Hall sensor 131 installed on the main circuit board 13 can sense the approach and distance of the magnetic pole. The detection signal of the Hall sensor 131 is transmitted to the controller through the line on the main circuit board 13. The mutual matching between the Hall magnetic poles formed by the Hall sensor 131 and the magnetic ring 22 is used to obtain the rotation angle of the rotating component 2 as the basis for the knob turning control.

[0044] The rotation switch signal is provided by the combination of the magnetic ring 22 and the Hall sensor 131. When the magnetic ring 22 rotates around the central axis, the Hall poles of the magnetic ring 22 will also move. The Hall sensor 131 can sense the changing magnetic field caused by the rotation of the Hall poles and send a corresponding electrical signal to the circuit board. After being processed by the circuit board or the back-end MCU, the rotation switch signal corresponding to the movement of the magnetic ring can be output.

[0045] The composite magnetized knob switch of the present invention realizes hand-feel feedback by means of a structure without direct contact, which can avoid the degradation of hand-feel caused by wear and tear due to long-term use, and the torque required to turn the knob can be more freely set according to the magnitude of the magnetic force, which helps to improve the hand-feel of the knob rotation operation. Hand-feel feedback and signal triggering are both realized by the magnetic poles in two directions of the same magnetic ring 22, and there is no need to set up two sets of magnetic structures, which can simplify the signal triggering structure, and integrate two functional systems by one magnetic ring 22, which can reduce the layout space.

[0046] Based on the above scheme, combined with Figure 3 , Figure 5 As shown, the magnetic ring 22 of the present invention is sleeved on the outer circumference of the iron ring 12. Both the magnetic ring 22 and the iron ring 12 are cylindrical structures. The diameter of the iron ring 12 is smaller than the diameter of the magnetic ring 22. The iron ring 12 can be inserted into the middle of the magnetic ring 22. The magnetic ring 22 and the iron ring 12 are coaxially arranged.

[0047] The torque poles are arranged radially, combined with Figure 8 , Fig. 9As shown, the torque pole A faces inward and points to the inner iron ring 12 , and the torque pole A can match with the iron ring 12 to form a magnetic adsorption force.

[0048] Combination Figure 6 , Figure 7 As shown, the iron ring 12 of the present invention includes a support arc 121 and a protrusion 122. The support arc 121 is a curved structure. A plurality of protrusions 122 protrude from the side wall of the support arc 121, and the protrusion direction of the protrusion 122 faces the magnetic ring 22. The number of protrusions 122 is set in a one-to-one correspondence with the torque pole A. When the protrusion 122 and the torque pole A are facing each other, the position of the magnetic ring 22 is limited. The rotational operation torque and the operation feel are provided by the combination of the magnetic ring 22 and the iron ring 12. The torque pole of the magnetic ring 22 and the surface protrusion of the iron ring 12 produce magnetic coupling. When the magnetic ring 22 rotates around the central axis, the magnetic coupling state will follow the rotation of the magnetic ring, and the surface protrusions 122 of the iron ring 12 will be disconnected, coupled, disconnected, coupled... continuously, thereby generating a corresponding increase or decrease in the magnetic attraction, thereby generating a rotational operation torque and an operation feel.

[0049] The shape of the iron ring 12 is not limited. It can be a full circle or a partial segment or other forms of similar functional structures, that is, it only needs to match with the magnetic ring 22 to form a complete magnetic field loop. The material of the iron ring 12 is also not limited. It can be pure iron, silicon steel or iron alloy and other magnetic conductive materials. It can be selected according to actual needs. The support arc 121 includes two settings. The support arc 121 is a complete ring or an even number of arc segments. Figure 3 , Figure 6 As shown, the support arc 121 shown therein is a complete annular structure, and a plurality of protrusions 122 are evenly distributed around the side wall of the support arc 121. Figure 5 As shown, the support arc 121 is an arc structure, the number of the support arcs 121 is an even number, and they are symmetrically arranged, and a plurality of protrusions 122 are arranged on each support arc 121, and each protrusion 122 can face a torque magnetic pole A. It should be noted that the present invention should also include the case where only one segmented arc is arranged.

[0050] In a specific embodiment, in combination Fig. 9 As shown, the magnetic ring 22 is a complete cylindrical structure, the inner surface and the outer surface of the magnetic ring 22 are smooth cylindrical surfaces, and there is no sharp protrusion structure on the surface of the magnetic ring 22.

[0051] The Hall sensor 131 can be arranged in two situations: the Hall sensor 131 is directly opposite to the magnetic ring 22 along the axial direction, and the Hall poles are distributed along the axial direction; or the Hall sensor 131 is located on the side of the magnetic ring 22, and the Hall poles are distributed along the radial direction. Figure 3The Hall sensor 131 is axially opposite to the magnetic ring 22. The Hall sensor 131 is located directly below the magnetic ring 22. The Hall poles formed by the magnetic ring 22 are distributed axially and face the Hall sensor 131. There is a certain axial distance between the Hall sensor 131 and the magnetic ring 22. Figure 5 The Hall sensor 131 is located on the side of the magnetic ring 22. At this time, the Hall poles are distributed along the axial direction. In this structure, the distance between the magnetic ring 22 and the circuit board 13 on which the Hall sensor 131 is installed is closer, which helps to reduce the height of the structure.

[0052] The magnetic ring 22 of the present invention adopts the Halbach array magnetization method to generate a unidirectional magnetic field in the radial and axial directions. The Hall sensor 131 can be located on the inner side or the outer side of the magnetic ring 22. Figure 5 In the structure shown in FIG, the Hall sensor 131 is located on the outside of the magnetic ring 22, and accordingly, the Hall magnetic poles face radially outward. If the Hall sensor 131 is located on the inside of the magnetic ring 22, the Hall magnetic poles face radially inward.

[0053] The two magnetic poles of the magnetic ring 22 body adopt the Halbach array magnetization method, and all the magnetic lines of force are directed to the same side and form a corresponding magnetic field loop, so that the magnetic properties of the magnetic ring can be utilized to the maximum extent, and the magnetic ring as a whole can realize various combinations of magnetic field loops such as "axial downward + radial inward", "axial downward + radial outward", "radial inward + radial outward" through one magnetization.

[0054] Halbach is a unidirectional magnetization method, combined with Fig. 9 As shown, when magnetizing radially inward, the outer diameter of the magnetic ring 22 is used as the boundary. Most of the magnetic lines of force are directed toward the inside of the magnetic ring 22 and form several magnetic field loops. The number of magnetic field loops is equal to the number of magnetizing poles, and the number of magnetizing poles needs to be determined according to the functional definition of the knob switch and the number of rotation gears. The area outside the outer diameter of the magnetic ring 22 is almost non-magnetic. In addition, there are many other Halbach array magnetization methods such as radial outward and axial downward.

[0055] Combination Figure 3 , Figure 5As shown, the rotating shaft of the rotating assembly 2 in the present invention is perpendicular to the main circuit board 13, and one end of the knob 21 is exposed from the support part 11 for the operator to twist. The operator pinches the exposed end of the knob 21 with his fingers and applies a twisting force to make the entire rotating assembly 2 rotate around the rotating shaft. When the rotating assembly 2 rotates around the rotating shaft, different Hall magnetic poles are sensed by the Hall sensor 131, thereby detecting the rotation angle of the rotating assembly 2, and triggering the rotation signal. The exposed part of the knob 21 is provided with a texture for increasing friction. The exposed part of the knob 21 can be provided with a contracted cone, and the cone surface fits the finger better. The texture provided on the cone surface can increase the friction with the finger, which can make it easier to rotate and reduce slippage.

[0056] Combination Figure 1 , Figure 2 , Figure 4 As shown, the support part 11 includes a bottom shell 111, a base 112, and a dust cover 113 which are relatively fixedly assembled. The bottom shell 111 and the base 112 are assembled with each other, and the base 112 and the dust cover 113 are assembled with each other. The main circuit board 13 is installed on the bottom shell 111, and a bracket 114 for mounting the iron ring 12 is provided on the base 112. The bracket 114 is inserted into the iron ring 12 to provide support and limit for the iron ring 12. The rotating component 2 can rotate circumferentially relative to the base 112. Figure 3 , Figure 5 As shown, the dust cover 113 is disposed above the base 112 to block the gap between the rotating assembly 2 and the base 112, thereby preventing dust and water. The outer periphery of the knob 21 is provided with a retaining edge 211 for shielding the dust cover 113, and the retaining edge 211 is covered on the outer side of the upper end of the dust cover 113, so as to guide water to the outside of the dust cover 113.

[0057] The composite magnetized knob switch of the present invention also includes a touch display component 3 installed on the fixed component 1. The touch display component 3 does not need to be rotated when it is operated. The touch display component 3 includes a display screen 31 and / or a button 32. The control display area of ​​the display screen 31 and / or the button 32 is surrounded by the knob 21. When the knob 21 is rotated, the touch display component 3 will not be rotated.

[0058] Combination Figure 2 , Figure 3 As shown, in this embodiment, the touch display component 3 is provided with a display screen 31 and a button 32. The display screen 31 surrounds the button 32. The button 32 can be pressed downwards as a physical mechanical pressing structure, and the display screen 31 is used to display the beacon. The display screen 31 can be set as a multi-purpose smart surface, integrating functions such as light beacon and capacitive diaphragm. The display screen 31 is combined with the button 32 and the knob 21, and the three can realize a rich combination of functions, completing the level adjustment, menu selection, and mode switching of the car air conditioning, entertainment and other systems.

[0059] Combination Figure 4 , Figure 5 As shown, in this embodiment, the touch display component 3 is provided with a display screen 31, and the display screen 31 is integrated with a touch unit and can be operated by touch. The area surrounded by the knob 21 is all the touch display component 3, which can provide a larger display area.

[0060] Combination Figure 1 , Figure 3 As shown, the touch display component 3 includes a lower shell 33, an upper shell 34, and an auxiliary circuit board 35; the lower shell 33 and the upper shell 34 are relatively assembled to form a cavity structure, and the auxiliary circuit board 35 is arranged in the inner cavity of the lower shell 33 and the upper shell 34 snap-fitted and assembled, and the auxiliary circuit board 35 sends and receives signals with the display screen 31 and the button 32 to realize signal control.

[0061] for Figure 2 , Figure 3 As shown in the structure, during assembly, the physical button 32, the display screen 31, the auxiliary circuit board 35, and the lower shell 33 are pre-installed as a whole, and then installed and fastened with the bracket 114, and the iron ring 12 is also installed and fastened with the bracket 114 to form a component; the magnetic ring 12 is installed and fastened with the knob 21; after the dust cover 113 is installed and fastened with the base 112, the main circuit board 13 is installed on the base 112, and then the above three components are nested and installed with the bottom shell 111 and fastened by screws 14 to make it a whole, and the assembly is completed.

[0062] exist Figure 2 , Figure 3 In the embodiment shown, the material of the magnetic ring 22 is bonded neodymium iron boron, the torque pole is magnetized by radial Halbach array, the material of the iron ring 12 is soft iron, and the magnetic ring 22 is radially cut, that is, Figure 7 As shown, there are 18 surface protrusions 122 on the iron ring 12, and the number of gears of the corresponding knob switch when it rotates one circle is also 18. The corresponding number of magnetized poles of the magnetic ring 22 is 18 (9N+9S), that is, there are 18 magnetic field loops on the torque poles. Therefore, the torque poles and the surface protrusions 122 on the iron ring 12 cooperate to form a total of 18 magnetic coupling loops as shown in the figure. When the operator turns the knob 21, the knob 21 drives the magnetic ring 22 to rotate, and the torque pole of the magnetic ring 22 also starts to rotate. Since the iron ring 12 is fastened by the iron ring bracket 114 and cannot rotate, the magnetic coupling circuit between the magnetic ring 22 and the iron ring 12 will also change with the rotation of the knob 21. The magnetic coupling circuit will gradually detach from the currently adsorbed protrusion of the iron ring 12 until it is completely disconnected from it, and reconstruct the magnetic coupling circuit with the next protrusion. The magnetic coupling circuit is disconnected, reconstructed, disconnected, and reconstructed... Correspondingly, the fluctuation of the magnetic attraction force between the magnetic ring 22 and the iron ring 12 will be fed back to the magnetic ring 22, and act on the knob 21 through the magnetic ring 22, thereby forming the rotational operating torque and operating feel of the knob switch.

[0063] When designing away from this embodiment, it is necessary to comprehensively consider the allowable installation space of the magnetic ring 22 and the iron ring 12 and the corresponding relationship between the surface protrusions of the magnetic ring 22 and the iron ring 12. The number of protrusions may not be equal to the number of magnetic field loops of the torque pole, but from the perspective of optimizing the utilization efficiency of magnetic properties, a 1:1 correspondence is preferred.

[0064] Book Figure 2 , Figure 3 In the illustrated embodiment, the Hall sensor 131 is disposed below the magnetic ring 22, and the Hall magnetic poles are magnetized axially downward using a multi-pole Halbach array. Specifically, a suitable number of magnetized poles can be selected according to the size and segment size of the magnetic ring 22, the material of the magnetic ring, and other specific conditions; when the knob 22 rotates, the Hall magnetic poles also rotate accordingly, and the Hall sensor 131 can sense the position change of the Hall magnetic poles and send a corresponding electrical signal to the main circuit board 13, which can then be fed back and output a switch signal corresponding to the rotation angle of the knob 21 after being processed by a preset algorithm.

[0065] for Figure 4 , Figure 5 In the embodiment shown, a display screen 31 which does not rotate with the knob 21 is provided in the center surrounded by the knob 21. The display screen 31 is conducive to enhancing the sense of technology and grade of the switch, and combined with the functional interconnection with the large car screen, it greatly enriches the functional diversity and playability of the switch in the cockpit.

[0066] exist Figure 4 , Figure 5 In the embodiment shown, the Hall sensor 131 is arranged on the outside of the magnetic ring 22. With the radial outward magnetization of the Hall pole, the distance between the magnetic ring 22 and the main circuit board 13 can be greatly reduced. Therefore, the layout space required for the switch signal system is significantly reduced. In addition, in the present embodiment, the shape of the iron ring 12 is not a complete circle, but only a part of the circle, so that more space can be freed up for the iron ring bracket 114 for other purposes. However, it should be noted that since the iron ring 12 of this embodiment only includes two symmetrically arranged protrusions, there are only two complete magnetic coupling loops, and the remaining magnetic field loops of the torque poles of the magnetic ring 22 cannot be fully utilized, and the magnetic performance utilization rate of the magnetic ring 22 is low.

[0067] The composite magnetized knob switch of the present invention integrates torque poles and Hall poles on a magnetic ring 22, which simplifies the mechanical structure and makes the space more compact. The multi-system integrated design also effectively reduces the assembly process of the product and reduces the assembly difficulty, improves the common rate of parts, and has very good economic performance. Only one composite magnetized magnetic ring and a corresponding combination of functional structures can realize the dual functions of rotation feel and switch signal, and realize "one ring for two uses". Compared with the traditional solution, it reduces space occupation and saves costs at the same time, and has the characteristics of high integration, compact structure and small space. The Halbach array magnetization method is adopted, so that the magnetic properties of the magnetic ring can be utilized to the maximum extent, the performance is improved and it is easy to implement. The solution provided by the present invention can accurately pre-set the rotation operation feel, has 360-degree rotation operation, a large torque adjustable range, and a knob switch with a non-contact magnetic structure. The operation feel is clear and the noise is low, and it can ensure that the rotation torque will not decay with long-term use, which provides a more effective solution to solve the problems of the prior art.

[0068] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite magnetized knob switch, characterized in that: It comprises a fixed component (1) and a rotating component (2); The fixing assembly (1) comprises a support portion (11), an iron ring (12), and a main circuit board (13); the iron ring (12) is fixedly mounted on the support portion (11) in a circumferential direction; the main circuit board (13) is mounted on the support portion (11); and a Hall sensor (131) is mounted on the main circuit board (13); The rotating assembly (2) comprises a knob (21) and a magnetic ring (22) which are relatively fixed in a circumferential direction. The magnetic ring (22) is installed inside the knob (21). The magnetic ring (22) adopts a segmented composite magnetization method to form two directional magnetic poles after magnetization, which are divided into a plurality of torque magnetic poles and a plurality of Hall magnetic poles according to their functions. When the magnetic ring (22) rotates, the torque magnetic pole cooperates with the iron ring (12) to generate a rotational torque, and the Hall magnetic pole cooperates with the Hall sensor (131) to achieve gear triggering.

2. The composite magnetized knob switch according to claim 1, characterized in that: The magnetic ring (22) is sleeved on the outer circumference of the iron ring (12), and the torque magnetic poles are arranged radially.

3. The composite magnetized knob switch according to claim 1, characterized in that: The iron ring (12) comprises a supporting arc (121) and a protrusion (122), and a plurality of the protrusions (122) protrude from the side wall of the supporting arc (121); The supporting arc (121) is a complete circular ring or an even number of circular arc segments.

4. The composite magnetized knob switch according to claim 1, characterized in that: The magnetic ring (22) is a complete cylindrical structure, and the inner surface and the outer surface of the magnetic ring (22) are smooth cylindrical surfaces.

5. The composite magnetized knob switch according to claim 1, characterized in that: The Hall sensor (131) is axially opposite to the magnetic ring (22), and the Hall magnetic poles are distributed along the axial direction; Alternatively, the Hall sensor (131) is located on the side of the magnetic ring (22), and the Hall magnetic poles are distributed radially.

6. The composite magnetized knob switch according to claim 2 or 5, characterized in that: The magnetic ring (22) adopts the Halbach array magnetization method, so that the magnetic ring (22) generates a unidirectional magnetic field in the radial direction and the axial direction.

7. The composite magnetized knob switch according to any one of claims 1 to 5, characterized in that: The rotating shaft of the rotating assembly (2) is perpendicular to the main circuit board (13); One end of the knob (21) is exposed from the support portion (11) and is used for being turned; the exposed portion of the knob (21) is provided with a pattern for increasing friction.

8. The composite magnetized knob switch according to claim 7, characterized in that: The support portion (11) comprises a bottom shell (111), a base (112), and a dust cover (113) which are relatively fixedly assembled; the main circuit board (13) is mounted on the bottom shell (111); the base (112) is provided with a bracket (114) for mounting the iron ring (12); the rotating assembly (2) is capable of circumferential rotation relative to the base (112); the dust cover (113) is arranged above the base (112); and the outer periphery of the knob (21) is provided with a retaining edge (211) for shielding the dust cover (113).

9. The composite magnetized knob switch according to claim 7, characterized in that: It also comprises a touch display component (3) mounted on the fixed component (1), the touch display component (3) comprising a display screen (31) and / or a button (32), and a control display area of ​​the display screen (31) and / or the button (32) is surrounded by the knob (21).

10. The composite magnetized knob switch according to claim 9, characterized in that: The touch display assembly (3) comprises a lower shell (33), an upper shell (34), and a secondary circuit board (35); the secondary circuit board (35) is arranged in an inner cavity of the lower shell (33) and the upper shell (34) which are snap-fitted and assembled.

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