Knob assembly

Abstract

The utility model discloses a knob assembly. The knob assembly comprises a mounting panel; a knob capable of rotating in the radial direction and pressing in the axial direction is arranged on the mounting panel; the knob comprises a turntable; seven magnets are arranged in a cavity of the turntable; the positioning disc is arranged in the cavity, a PCB is arranged on the upper surface of the positioning disc, and two Hall elements and a processing unit are arranged on the PCB; the lower end of the positioning disc is connected with the mounting panel through a reset assembly so that the knob can be arranged above the mounting panel in an axial pressing mode, and the bottom of the reset assembly penetrates through the lower end of the mounting panel. The pressing panel is arranged on the upper surface of the positioning disc; the external PCB is connected with the lower surface of the installation panel in a spaced mode, and a light touch key which is connected with the main control system and located below the reset assembly is arranged on the side, opposite to the installation panel, of the external PCB. According to the utility model, two Hall elements and seven magnets are arranged to replace an encoder to output control signals, so that the installation in a limited space is realized, the cost is low, and the push-type function switching is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a knob assembly, especially a knob assembly for household appliance. BACKGROUND

[0002] On some commonly used household appliances, such as drum washing machines, a knob assembly is often provided, and the knob assembly can be manually rotated to select the operation function of the appliance or adjust the time setting such as the reservation time.

[0003] At present, the control mode of the existing knob assembly mostly adopts an encoder for control, but the encoder is relatively large in size, thereby failing to adapt to the increasingly miniaturized products, and the internal installation space is insufficient, which leads to the fact that the existing encoder cannot be assembled and produced, thereby bringing many adverse effects to the actual production and processing of enterprises. SUMMARY

[0004] The utility model aims at overcoming the defects of the prior art and provides a knob assembly, which is low in cost and can realize the control of the appliance by the button in a smaller space and facilitate the switching of functions.

[0005] To achieve the above object, the utility model adopts the technical scheme of a knob assembly, which comprises a mounting panel, a knob, an external PCB board, a main control system and a light touch button.

[0006] The knob comprises a rotating disc, a magnet, a positioning disc, a PCB board, a Hall, a processing unit, a reset assembly and a pressing panel; the rotating disc has at least seven magnets in the cavity; the positioning disc is arranged in the cavity, the upper surface of the positioning disc is provided with the PCB board, and the PCB board is provided with two Halls and a processing unit; the lower end of the positioning disc is connected with the mounting panel through the reset assembly, so that the knob is arranged above the mounting panel in the form of rotation shaft and axial pressing, and the bottom of the reset assembly penetrates the lower end of the mounting panel; the pressing panel is arranged on the upper surface of the positioning disc

[0007] The external PCB board is connected with the lower surface of the mounting panel in space, one side of the external PCB board opposite to the mounting panel is provided with the light touch button connected with the main control system and located below the reset assembly;

[0008] When the pressing panel is pressed downward, the pressing panel drives the whole knob to be pressed downward, the reset assembly moves downward and contacts with the light touch button, and the main control system controls the knob to switch functions; when the pressing panel is released, the reset assembly drives the knob to return.

[0009] In an embodiment, the number of magnets is seven, and the seven magnets are evenly spaced in the cavity and arranged opposite to the two Halls.

[0010] In an embodiment, the reset assembly includes a copper shaft, a copper sleeve, a reset spring, and a snap spring; the copper sleeve is arranged in the mounting panel; the copper shaft extends downward from the bottom of the positioning disc, penetrates through the copper sleeve, and penetrates out from the bottom of the mounting panel; the snap spring limits the copper shaft radially in the mounting panel and the positioning disc; the reset spring is arranged on the copper shaft above the copper sleeve.

[0011] In an embodiment, the height difference between the magnet and the Hall is between 0-2mm.

[0012] In an embodiment, the external PCB board is connected to the lower end of the mounting panel through three screw columns, and the three screw columns are arranged on the lower surface of the mounting panel.

[0013] In an embodiment, the mounting panel is further provided with a damping mechanism that can be extended up and down, and the upper end of the damping mechanism is in contact with the rotating disc.

[0014] Due to the use of the above technical scheme, the present application has the following advantages compared with the prior art:

[0015] The knob assembly of the present application replaces the control function of the encoder by arranging two Halls and at least seven magnets, when the rotating disc drives the plurality of magnets to rotate to the set position, one of the two Halls corresponds to the magnet, and the other does not correspond to the magnet, then the processing unit calculates the relative coordinates of the magnet and the Hall to obtain the rotation angle of the rotating disc and the change of the rotation direction, and finally outputs the corresponding control signal, thereby achieving the installation of the control system in a limited space, and the use of two Halls to control the plurality of magnets can reduce the cost of the magnets.

[0016] Secondly, the reset assembly and the touch button can be matched to switch the pressing function, so that the opening and closing of the knob assembly and the switching of some special functions can be realized, which is convenient to operate, practical, and meets the use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0017] The technical scheme of the present application will be further described below with reference to the drawings:

[0018] Figure 1 is a schematic view of the three-dimensional structure of an embodiment of the present application;

[0019] Figure 2 is a sectional view of Figure 1 ​

[0020] Figure 3 is a partial schematic view of the embodiment of the present application; Figure 2

[0021] Figure 4 is another perspective view of the embodiment of the present application; Figure 1

[0022] Figure 5 is a perspective exploded view of the embodiment of the present application;

[0023] Wherein: 1, mounting panel; 2, turntable; 3, magnet; 4, positioning disc; 5, PCB board; 6, hall; 7, processing unit; 9, external PCB board; 10, pressing panel; 11, reset component; 12, damping mechanism; 13, light touch button; 20, cavity; 30, gap; 110, copper shaft; 111, copper sleeve; 112, reset spring; 113, clamp spring; 114, screw column. DETAILED DESCRIPTION

[0024] In order to make the personnel in the technical field better understand the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0025] The present application provides a knob assembly to solve the problem that the knob assembly in the prior art mostly adopts a traditional encoder, but the installation space of the encoder is large, so it cannot meet the adjustment function of some household electrical products with narrow installation space, and the problem of inconvenient function switching.

[0026] For the convenience of understanding, the specific process in the embodiments of the present application will be described below. Please refer to Figures 1 to 5 The knob assembly in the embodiments of the present application comprises a mounting panel 1, a knob, an external PCB board 9, a master control system and a light touch button 13. The upper surface of the mounting panel 1 is provided with a knob which can be rotated radially and pressed axially.

[0027] ​​The knob comprises a rotating disc 2, a magnet 3, a positioning disc 4, a PCB 5, a Hall 6, a processing unit 7, a pressing panel 10 and a reset assembly 11; the rotating disc 2 is internally provided with a cavity 20, the cavity 20 is internally provided with at least seven uniformly distributed magnets 3; the positioning disc 4 is arranged in the cavity 20, the PCB 5 is arranged on the positioning disc 4, the two Halls 6 and the processing unit 7 are arranged on the PCB 5. The lower end of the positioning disc 4 is connected with the mounting panel 1 through the reset assembly 11, so that the knob can be axially pressed and arranged above the mounting panel 1, and a gap 30 for axial pressing of the knob is left between the lower surface of the rotating disc 2 and the upper surface of the mounting panel 1; the bottom of the reset assembly 11 penetrates from the lower end of the mounting panel 1; in this way, when the knob is pressed, the whole knob can be axially pressed within the axial distance of the gap 30 and reset through the reset assembly 11; the pressing panel 10 is arranged on the upper surface of the positioning disc 4.

[0028] The external PCB 9 is connected with the lower surface of the mounting panel 1 in a spaced-apart manner, and the external PCB 9 is provided, on the side opposite to the mounting panel 1, with a touch button 13 connected with the master control system and located below the reset assembly 11.

[0029] When the pressing panel 10 is pressed downward, the pressing panel 10 drives the knob to be pressed downward, the reset assembly 11 is in contact with the touch button 13, and the master control system controls the knob to switch functions; when the pressing panel 10 is released, the reset assembly 11 drives the knob to return to the original position.

[0030] The knob assembly of the utility model adopts two Halls 6 to correspond to the positions of at least seven magnets 3, when the rotating disc 2 drives the at least seven magnets 3 to rotate to the set positions, the two magnets 3 correspond to the Halls 6 and the empty positions respectively, then the processing unit 7 calculates the relative coordinates of the magnets 3 and the Halls 6, and further obtains the change of the rotating angle and the rotating direction of the rotating disc 1, outputs the corresponding control signal, realizes the installation of the control system in the limited space without using the encoder, and simultaneously adopts the at least seven magnets 3 to adapt the positions of the two Halls 6, the cost of the magnets 3 is relatively low, and the cost of the product is reduced.

[0031] Meanwhile, the reset assembly 11 and the touch button 13 can be matched with each other, so that the knob assembly can be quickly switched in function.

[0032] In an embodiment, the number of the magnets 3 is seven, and the seven magnets 3 are evenly spaced in the cavity 20 and are arranged opposite to the two Halls 6, and in this embodiment, multiple magnets 3 are used to adapt the position of the Halls, and the cost of the magnets 3 is relatively low compared to the price of the Halls 6, so as to further reduce the cost of the rotary knob assembly; the seven magnets correspond to the control of fourteen functions.

[0033] In an embodiment, referring to Figures 3 to 5 , the reset assembly 11 includes a copper shaft 110, a copper sleeve 111, a reset spring 112, and a snap spring 113; the copper sleeve 111 is arranged in the mounting panel 1; the copper shaft 110 extends downward from the bottom of the positioning disc 4, penetrates through the copper sleeve 111, and penetrates out from the bottom of the mounting panel 1; the snap spring 113 limits the copper shaft 110 radially in the mounting panel 1 and the positioning disc 4; the reset spring 112 is sleeved on the copper shaft 110 above the copper sleeve 111.

[0034] In this embodiment, the touch button 13 is a spring sheet with a pressing stroke of 0.3, and when the function switching is the opening and closing of the rotary knob assembly, the first contact of the copper shaft 110 with the touch button 13 is the opening of the rotary knob assembly, and the second contact is the closing of the rotary knob assembly.

[0035] In the initial state, the touch button 111 is not in contact with the copper shaft 110, and when the function switching of the rotary knob assembly is needed, the pressing panel 10 is pressed downward manually, so that the positioning disc 4 drives the copper shaft 110 to move downward to a certain position, the bottom of the copper shaft 110 contacts the touch button 111 to send a signal to the main control system, and the main control system realizes the function switching of the rotary knob assembly; at the same time, the reset spring 112 is compressed and retracted, and when the pressing panel 10 is not pressed, the reset spring 112 automatically drives the copper shaft 110 to reset; when the function reset is needed, the pressing panel 10 is pressed again, so that the copper shaft 111 contacts the touch button 111 to send a signal, and the main control system controls the rotary knob assembly to reset.

[0036] The damping mechanism 12 is further arranged between the rotating disc 2 and the mounting panel 1 and can be extended upward and downward, and the damping mechanism 12 is used to make the rotating disc 2 have a damping feeling when rotating, and can adopt corresponding function control at each damping feeling to meet the use demand.

[0037] In an embodiment, the height difference between the magnet 3 and the Hall 6 is between 0-2mm, and in this embodiment, it is 1mm, and the limited height is used to make the position sensing between the magnet 3 and the Hall 6 be sensed by the processing unit 7, so as to make correct testing and detection.

[0038] In an embodiment, the pressing panel 10 is a liquid crystal display screen with a size of 1.8 inches, and can also be of other sizes. Here, the main specification is for a small-sized liquid crystal display screen, because the corresponding size of the rotary knob assembly is also small, and thus corresponding adaptation needs to be made.

[0039] In an embodiment, the external PCB board 9 is connected and arranged in space with the mounting panel 1 through three screw columns 114, which are arranged on the mounting panel, and the tactile button 13 is arranged on the side of the external PCB board 9 opposite to the mounting panel 1.

[0040] A specific embodiment is listed below for illustration.

[0041] The rotary knob is installed on the corresponding electrical equipment, and in this embodiment, a washing machine is used, that is, the mounting panel in this embodiment is the mounting panel of the washing machine, and the function switching is the opening and closing of the rotary knob assembly.

[0042] When the corresponding operation function is needed, the rotating disc 2 is manually operated to rotate, and when the rotating disc 2 is rotated to a gear position, the first Hall 6 at this time corresponds to the position of a magnet 3, and the other Hall 6 does not correspond to a magnet 3, that is, it is in the empty position. Then the processing unit 7 judges whether the corresponding magnet 3 is left-handed or right-handed, and then the processing unit 7 calculates the relative position of the magnet 3 and the Hall 6 according to the signal, so as to judge the rotation angle and direction of the rotating disc 2, and then the processing unit 7 can judge the rotation angle and direction of the rotating disc in real time, and then send a corresponding control signal for control.

[0043] When the rotary knob assembly needs to be closed, the pressing panel 10 only needs to be pressed down, so that the copper shaft 110 moves down and contacts and conducts the tactile button 13 to send a signal to the main control system, the main control system controls the rotary assembly to stop working, and then the pressing panel 10 is released, and the reset spring 112 drives the copper shaft 110 to reset. When the rotary knob assembly needs to be opened, the pressing panel 10 is pressed again, so that the copper shaft 111 contacts and conducts the tactile button 13 again to send a signal to the main control system, so as to conveniently realize the related function switching through pressing.

[0044] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A knob assembly, characterized in that: It includes a mounting panel (1), a knob, an external PCB board (9), a main control system, and a touch button (13); the mounting panel (1) is provided with a knob that can be rotated radially and pressed axially; The knob includes a turntable (2), magnets (3), a positioning plate (4), a PCB board (5), Hall effect sensors (6), a processing unit (7), a reset assembly (11), and a pressing panel (10); the cavity (20) of the turntable (2) contains at least seven magnets (3); the positioning plate (4) is disposed in the cavity (20), and the upper surface of the positioning plate (4) is provided with a PCB board (5), and the PCB board (5) is provided with two Hall effect sensors (6) and a processing unit (7); the lower end of the positioning plate (4) is connected to the mounting panel (1) through the reset assembly (11), so that the knob can be axially pressed and positioned above the mounting panel (1), and the bottom of the reset assembly (11) passes through the lower end of the mounting panel (1); the pressing panel (10) is disposed on the upper surface of the positioning plate (4); The external PCB board (9) is connected to the lower surface of the mounting panel (1) in a space. The external PCB board (9) has a touch button (13) connected to the main control system on one side opposite to the mounting panel (1) and located below the reset component (11). When the pressing panel (10) is pressed down, the pressing panel (10) drives the knob to press down. After the reset component (11) contacts the light touch button (13), the main control system controls the knob to switch functions. When the pressing panel (10) is released, the reset component (11) drives the knob to return to its original position.

2. The knob assembly as claimed in claim 1, characterized in that: The number of magnets (3) is seven, and the seven magnets (3) are evenly spaced in the cavity (20) and are arranged vertically opposite to the two Hall effect sensors (6).

3. The knob assembly as described in claim 1, characterized in that: The reset assembly (11) includes a copper shaft (110), a copper sleeve (111), a reset spring (112), and a retaining ring (113); the copper sleeve (111) is disposed inside the mounting panel (1); the copper shaft (110) extends downward from the bottom of the positioning plate (4), passes through the copper sleeve (111), and then exits from the bottom of the mounting panel (1); the retaining ring (113) radially limits the copper shaft (110) within the mounting panel (1) and the positioning plate (4); the reset spring (112) is sleeved on the copper shaft (110) above the copper sleeve (111).

4. The knob assembly as claimed in claim 1, characterized in that: The height difference between the magnet (3) and the Hall (6) is between 0 and 2 mm.

5. The knob assembly as claimed in claim 1, characterized in that: The external PCB board (9) is connected to the lower end of the mounting panel (1) by three screw posts (114) in a spaced manner. The three screw posts (114) are set on the lower surface of the mounting panel (1).

6. The knob assembly as claimed in claim 1, characterized in that: The mounting panel (1) is also provided with a damping mechanism (12) that can extend and retract vertically, and the upper end of the damping mechanism (12) is in contact with the turntable (2).

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