Magnetic type knob based on capacitance key

Abstract

The utility model provides a magnetic type knob based on a capacitance key. The magnetic type knob comprises a knob assembly and a capacitance key assembly. The knob assembly comprises an adsorption magnet, a conductor and a conductive shell; the capacitor key assembly comprises a positioning magnet and a capacitor key block; the adsorption magnet and the positioning magnet are connected in a magnetic attraction manner, so that detachable connection between the knob assembly and the capacitor key assembly is realized; the electric conductor is installed on the side, facing the capacitance key assembly, of the knob assembly, one end of the electric conductor is connected to the shell of the knob assembly, and the other end of the electric conductor makes contact with a capacitance key block of the capacitance key assembly so that the knob assembly can touch and control the capacitance key block.

Description

Technical Field

[0001] The present application relates to the field of electrical appliances, and particularly to a magnetic suction type knob based on a capacitive button. Background Art

[0002] A knob is a commonly used control device for electrical appliances. There are mechanical knobs and magnetic suction type knobs on the market. Compared with mechanical knobs, magnetic suction type knobs do not require holes to be drilled on the panel, achieving complete isolation between the operating knob and the main control circuit board inside the device, and having advantages such as waterproof, dustproof, oil-proof, good safety, easy cleaning of the device, etc., and can give more creative space to the device appearance designers. However, existing magnetic suction type knobs, such as those including Hall sensors, determine the rotation angle and rotation speed of the knob by perceiving the magnetic field, that is, control is achieved through magnetic adsorption. The disadvantages of such magnetic suction type knobs are high temperature dependence, limited by the magnetic field in knob control, low sensitivity, and many restrictions in use. How to provide a knob with high compatibility, wide application range, and capable of combining the advantages of magnetic suction type knobs, so that it can be widely used in electrical appliances, is a technical problem currently faced.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the Invention

[0004] In view of the above deficiencies of the prior art, the present application provides a magnetic suction type knob based on a capacitive button, aiming to solve the deficiencies of existing magnetic suction type knobs such as being limited by the magnetic field, high temperature dependence, and low sensitivity, and proposes a knob that combines magnetic adsorption and capacitive button control, which can not only ensure the advantages of magnetic adsorption, such as convenient disassembly and cleaning, waterproof, dustproof, oil-proof, but also be not limited by temperature and magnetic field, have high sensitivity, high scalability, and be widely applicable to various electrical appliances.

[0005] The present application is achieved through the following technical solutions:

[0006] A first aspect of the present application lies in providing a magnetic suction type knob based on a capacitive button, including: a knob assembly and a capacitive button assembly; the knob assembly includes an adsorption magnet, a conductor, and a conductive outer shell; the capacitive button assembly includes a positioning magnet and a capacitive button block; the adsorption magnet and the positioning magnet are magnetically connected, so as to realize the detachable connection between the knob assembly and the capacitive button assembly; the conductor is installed on a side of the knob assembly facing the capacitive button assembly, one end is connected to the outer shell of the knob assembly, and the other end is in contact with the capacitive button block of the capacitive button assembly, so as to realize the knob assembly controlling the capacitive button block by touch.

[0007] Specifically, the knob assembly further includes: a base and an inner shell sleeved on the periphery of the base; wherein, the outer shell is sleeved on the periphery of the inner shell.

[0008] Specifically, the base is provided with a base through-hole, and the adsorption magnet is arranged in the base through-hole.

[0009] Specifically, the inner shell is an annular body, and the inner wall of the inner shell surrounds to form an inner shell through-hole, and the inner shell through-hole is sleeved on the periphery of the base; the inner shell is provided with a conductive through-hole along the axial direction, and the conductor passes through the conductive through-hole from the side of the inner shell far away from the outer shell to the other side of the inner shell facing the outer shell and is connected to the outer shell; the inner shell is further provided with a screw through-hole, and a screw passes through the screw through-hole to be connected to the outer shell.

[0010] Specifically, the conductor includes a touch end and a connecting body fixedly connected to the touch end; the connecting body passes through the conductive through-hole and is connected to the inner side of the outer shell, so that when a finger touches the outer shell, an electrical connection of a coupling capacitor is formed with the capacitive button block through the conductor.

[0011] Specifically, the conductor further includes a spring, and the connecting body passes through the conductive through-hole after being sleeved on the spring, so that the conductor can stretch along the direction of the conductive through-hole.

[0012] Specifically, the inner side of the outer shell includes: a conductor positioning hole for connecting with the connecting body; and a screw positioning hole for connecting with the screw to realize the connection between the outer shell and the inner shell.

[0013] Specifically, a bearing is further included inside the outer shell, and the outer shell rotates around the central axis of the bearing; the bearing passes through the inner shell through-hole and is connected to the base.

[0014] Specifically, the knob assembly further includes an anti-slip pad, and the anti-slip pad is arranged on one side of the base facing the capacitive button assembly.

[0015] The second aspect of the present application lies in providing an electrical appliance, including a magnetic adsorption type knob based on capacitive buttons as described above.

[0016] Compared with the prior art, the present application mainly has the following beneficial effects: The present application solves the deficiencies of the existing magnetic adsorption type knob of the Hall sensor, such as being restricted by the magnetic field, having high temperature dependence, and low sensitivity, and proposes a knob combining magnetic adsorption and capacitive button control. It can not only ensure the advantages of magnetic adsorption, for example, being convenient for disassembly and cleaning, waterproof, dustproof, and anti-oil pollution, but also can realize capacitive control without being restricted by temperature and magnetic field, with high sensitivity and high scalability, and is widely applicable to various electrical appliances. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 An exploded view of a magnetic - absorption type knob based on capacitive keys according to an embodiment of the present application.

[0019] Figure 2 A bottom view of a magnetic - absorption type knob based on capacitive keys according to an embodiment of the present application.

[0020] Figure 3 A side view of a magnetic - absorption type knob based on capacitive keys according to an embodiment of the present application.

[0021] Figure 4 A schematic diagram of a capacitive key assembly of a magnetic - absorption type knob based on capacitive keys according to an embodiment of the present application.

[0022] Figure 5 A schematic diagram of an electric kettle using the magnetic - absorption type knob of the present application.

[0023] Reference numerals: 1 - knob assembly; 10 - base; 11 - base housing; 12 - base through - hole; 13 - adsorption magnet; 20 - inner housing; 21 - conductor; 211 - touch end; 212 - connecting body; 213 - spring; 22 - inner housing through - hole; 23 - conductive through - hole; 24 - screw; 25 - screw through - hole; 30 - outer housing; 31 - outer side surface; 32 - inner ring; 33 - conductor positioning hole; 34 - screw positioning hole; 40 - bearing; 50 - anti - slip pad; 6 - capacitive key assembly; 61 - positioning magnet; 62 - capacitive key block; 7 - electric kettle; 71 - kettle body; 72 - heating base; 721 - display screen. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present application in combination with the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0025] It should be understood that the terms used in the description of the embodiments of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. As used in the description of the embodiments of the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0027] A first aspect of the present application is to provide a magnetic suction type knob based on a capacitive button, including a knob assembly 1 and a capacitive button assembly 6.

[0028] As Figure 1 shown, it is an exploded view of a knob assembly 1 based on a capacitive button. The knob assembly 1 includes a base 10, an inner shell 20, an outer shell 30, a bearing 40 and an anti-slip pad 50.

[0029] Specifically, the base 10 includes a base outer shell 11 and a base through hole 12 formed by surrounding the inner side of the base outer shell 11. The adsorption magnet 13 is placed in the base through hole 12. Specifically, the adsorption magnet 13 is magnetically connected to the positioning magnet 61 of the capacitive button assembly 6 as Figure 4 shown. The combination of the adsorption magnet 13 and the positioning magnet 61 realizes the magnetic suction connection between the knob assembly 1 and the capacitive button assembly 6. In this way, the knob assembly can be magnetically adsorbed on the electrical appliance during use. When cleaning is required, the knob assembly can be removed, which is convenient to use and there is no dead angle for cleaning.

[0030] As Figure 1 shown, the base outer shell 11 is a multi-layer structure composed of integrally formed annular structures with different diameters, including a first ring 111, a second ring 112 and a third ring 113. The diameters of the first ring 111, the second ring 112 and the third ring 113 in the radial direction decrease from large to small. The adsorption magnet 13 is a cylinder, and the diameter of the adsorption magnet 13 in the radial direction is adapted to the inner diameter of the third ring 113. The axial height of the adsorption magnet 13 is less than or equal to the axial height of the base outer shell 11 to ensure that the adsorption magnet 13 can be placed in the base through hole 12 of the base 10. Optionally, the base through hole 12 is a cylindrical through hole with a diameter equal to the inner diameter of the third ring 113, so that the adsorption magnet can be placed in the base through hole 12, and the adsorption magnet can magnetically connect with the positioning magnet with the base. Optionally, the adsorption magnet can also be other shapes, such as a cube or a cuboid, which can be placed in the base through hole 12 and the interval between it and the positioning magnet is as small as possible, so that the magnetic suction force is larger.

[0031] As shown Figure 1 in the figure, the inner shell 20 is an annular body, and the inner wall of the inner shell 20 forms an inner shell through hole 22 around it. The inner diameter of the inner shell through hole 22 is adapted to the outer diameter of the first ring 111. Therefore, the inner shell through hole 22 can be sleeved around the periphery of the base 10, specifically around the periphery of the first ring 111, so that the second ring 112 and the third ring 113 of the base can pass through the inner shell through hole 22.

[0032] Specifically, the inner shell 20 is provided with a conductive through hole 23 along the axial direction, passing through the conductive through hole 23 from the side of the inner shell 20 far away from the outer shell 30 to the other side of the inner shell 20 facing the outer shell 30, and connecting with the outer shell 30.

[0033] Specifically, the conductor 21 includes a touch end 211 and a connecting body 212 fixedly connected to the touch end 211; the connecting body 212 passes through the conductive through hole 23 and is connected to the inner side of the outer shell 30, so that when a finger touches the outer shell 30, an electrical connection of a coupling capacitor is formed through the conductor 21 and the capacitive button block 62.

[0034] Specifically, the conductor 21 further includes a spring 213. The connecting body 212 passes through the conductive through hole 23 after being sleeved on the spring 213, so that the conductor can expand and contract along the direction of the conductive through hole.

[0035] Optionally, the diameter of the touch end 211 is larger than the diameter of the connecting body 212, so that the spring 213 will not fall off. Optionally, the top surface of the touch end 211 is hemispherical, so that it is easy to slide when transferring from one capacitive button block 62 to another capacitive button block 62. The performance of precise touch and sliding is improved.

[0036] As shown Figure 1 in the figure, the inner shell 20 is further provided with a screw through hole 25, and a screw 24 passes through the screw through hole 25 and is connected to the outer shell 30. The number of screws 24 is set according to the size of the knob assembly, preferably 3, and the angle between them is 120°, so that it can be more stably fixed on the outer shell 30. Through the screw 24, the outer shell 30 and the inner shell 20 can be fixedly connected, so that when the outer shell 30 rotates, it drives the rotation of the conductor 21 at the bottom of the inner shell 20. Preferably, the rotation axes of the outer shell 30 and the inner shell 20 are the same, and the conductor 21 can make a circular motion on the bottom surface of the inner shell.

[0037] As shown Figure 1As shown, the outer shell 30 includes an annular outer side surface 31 and an inner ring 32 with a diameter smaller than that of the outer side surface 31. The inner diameter of the outer side surface 31 is adapted to the outer diameter of the inner shell 20. A conductor positioning hole 33 is provided on the side of the inner ring 32 facing the inner shell 20 for connecting with the connecting body 212. Specifically, the conductor 21 passes through the conductive through hole 23 and is connected to the conductor positioning hole 33, realizing the connection between the conductor 21 and the outer shell 30. Since both the conductor 21 and the outer shell 30 are made of conductive materials, when the knob assembly 1 is magnetically connected to the capacitive button assembly 6 and the user rotates the outer shell 30 by hand, a coupling capacitance is formed between the human body electric field, the outer shell 30, the conductor 21 and the capacitive button block 62 as shown in Figure 4 The current generated by the human body is coupled to the static capacitance, making the capacitance value of the capacitive button reach the maximum. At this time, the changing capacitance value will transmit and convert the signal, converting the capacitive signal into a certain control signal. Other control structures and circuit modules on the electrical appliance receive the signal, thereby realizing the control of the electrical appliance (not shown).

[0038] Specifically, a screw positioning hole 34 is also provided on the side of the inner ring 32 facing the inner shell 20 for connecting with the screw 24, realizing the connection between the outer shell 30 and the inner shell 20. The screw 24 passes through the screw through hole 25 and is connected to the screw positioning hole 34, thereby connecting the outer shell 30 and the inner shell 20 together. Preferably, the connection between the outer shell 30 and the inner shell 20 can also be achieved by bonding. As shown in Figure 2 Shown is the bottom view of the combined state of the knob assembly. The base 10 is in the innermost circle, the inner shell 20 is in the middle circle, the outer shell 30 is in the outermost circle, and the bottom surface of the inner shell 20 shows the screw 24 and the touch end 211 of the conductor 21.

[0039] Specifically, a bearing 40 is placed inside the inner ring 32. The base 10 passes through the inner shell through hole 22 and is sleeved in the inner diameter of the bearing. The outer shell 30 can rotate around the bearing. When in use, the base 10 is stationary due to the suction and limit of the adsorption magnet 13, and the bearing 40 is also stationary accordingly. However, the outer shell 30 drives the inner shell 20 and the conductor 21 to make a circular motion under the rotation of the user's finger, thereby realizing the contact between the conductor 21 and different capacitive button blocks.

[0040] As shown in Figure 3 Shown is the side view of the combined state of the knob assembly. The knob assembly 1 further includes an anti-slip pad 50. The anti-slip pad 50 is provided on the bottom surface of the base 10 on the side away from the inner shell 20, that is, on the side facing the capacitive button assembly 6. The height of the touch end 211 is slightly lower than that of the anti-slip pad, making the touch end 211 convenient for sliding.

[0041] As shown in Figure 4 Shown is the plan view of the capacitive button assembly 6, including a positioning magnet 61 and a capacitive button block 62.

[0042] Specifically, the adsorption magnet 13 and the positioning magnet 61 can be magnetically connected, so as to realize the detachable connection between the knob assembly 1 and the capacitive button assembly 2.

[0043] Specifically, the conductor 21 is installed on the side of the knob assembly 1 facing the capacitive button assembly 2. One end is connected to the housing 30 of the knob assembly 1, and the other end contacts the capacitive button block 62 of the capacitive button assembly 6, so that the knob assembly 1 can touch-control the capacitive button block 62. Specifically, the arrangement of the capacitive button blocks 62 depends on the rotation law of the conductor 21, which can be circular circumferential motion or square circumferential motion, and can be designed according to actual needs.

[0044] For the magnetic adsorption type knob based on capacitive buttons in this application, there is no integrated circuit inside the knob assembly 1, and there is no magnetic force control caused by wireless signal matching and magnet strength change. Therefore, the usage restrictions are small. It only needs to achieve control through conductive materials and capacitive buttons, with a simple structure, convenient use, strong anti-interference ability, low cost, and easy expansion.

[0045] Optionally, one housing can match two or more inner housings. The housing can be designed as a two-ring rotatable housing, which can drive two conductors on two inner housings respectively, so as to realize one knob assembly controlling two groups of capacitive button assemblies and optimize the magnetic adsorption type knob based on capacitive buttons. Specifically, different magnetic adsorption type knobs can be designed according to actual needs.

[0046] In the second aspect of this application, an electrical appliance is provided, including a panel and a control circuit. The inner side of the panel is installed with a capacitive button assembly 6, and the control circuit is electrically connected to the capacitive button assembly to sense and process signals caused by capacitance changes. The outer side of the electrical appliance is designed as an integral body, and the selected material can be a material that does not affect magnetic adsorption. When the knob assembly is adsorbed on the panel, the capacitive button assembly 6 can be controlled by the knob assembly 1, so as to generate a signal and send it to the control circuit, and the function of controlling the electrical appliance is realized through other structures of the electrical appliance (not shown in the figure). As Figure 5 shown, it is a schematic diagram of an electric kettle 7 adopting the magnetic adsorption type knob of this application, including a kettle body 71 and a heating base 72. A display screen 721 is arranged at one end of the heating base 72 to display the temperature change. A capacitive button assembly 6 is installed on one side of the display screen 721 and is connected to the temperature indicator light on the display screen through an internal control circuit (the internal structure is not shown in the figure). Specifically, the capacitive button assembly 6 can position and adsorb the knob assembly 1. The figure shows the state where the adsorbed knob assembly 1 is not adsorbed. After magnetically connecting the knob assembly 1 to the capacitive button assembly 6 and rotating the knob, the heating temperature can be controlled.

[0047] Specifically, in one embodiment, the electrical appliance is a health care kettle, and the capacitive button assembly represents regulation buttons for different functions. For example, 10 functional capacitive buttons are set, respectively representing functions such as boiling water, disinfection, flower tea, cooking porridge, making milk powder, tremella, steaming eggs, cooking noodles, keeping warm, and reservation. The base of the health care kettle is provided with a heat-resistant tempered glass panel. A control circuit is arranged inside the base of the health care kettle, and the control circuit is respectively connected to the capacitive buttons and the function indicator lights on the glass panel. The knob assembly of the magnetic suction type knob based on capacitive buttons of the present application is magnetically connected to the capacitive button assembly. When in use, the user rotates the outer shell by hand to make the conductor contact a certain functional capacitive button, and a coupling capacitor is formed among the user, the conductor, and the capacitive button. The current generated by the human body is coupled to the static capacitive button, making the capacitance value of the capacitive button reach the maximum. At this time, the changing capacitance value will transmit and convert the signal, converting the capacitive signal into a certain control signal. The control circuit inside the base of the health care kettle receives the control signal, controls the temperature and duration of the heating element, and at the same time, controls the corresponding function indicator light to turn on, and the base of the health care kettle starts to work. The tempered glass panel of the entire base can be set as an integral type. In this way, since there is no circuit structure or module inside the knob, it is easy to clean and not easily damaged. When cleaning, as long as the magnetic suction type knob is removed, the base of the health care kettle and the magnetic suction type knob can be easily cleaned.

[0048] In summary, the present application provides a magnetic suction type knob based on capacitive buttons, including: a knob assembly and a capacitive button assembly; the knob assembly includes an adsorption magnet, a conductor, and a conductive outer shell; the capacitive button assembly includes a positioning magnet and a capacitive button block; the adsorption magnet and the positioning magnet can be magnetically connected, so as to realize the detachable connection between the knob assembly and the capacitive button assembly; the conductor is installed on one side of the knob assembly facing the capacitive button assembly, one end is connected to the outer shell of the knob assembly, and the other end contacts the capacitive button block of the capacitive button assembly, so as to realize the knob assembly touching and controlling the capacitive button block. The magnetic suction type knob based on capacitive buttons of the present application aims to solve the deficiencies of the existing magnetic suction type knobs, such as being restricted by magnetic fields, having high temperature dependence, and low sensitivity, and proposes a knob that combines magnetic adsorption and capacitive button control. It can not only ensure the advantages of magnetic adsorption, such as being convenient for disassembly and cleaning, waterproof, dustproof, and oil-proof, but also can realize capacitive control without being restricted by temperature and magnetic fields, with high sensitivity and high scalability, and is widely applicable to various electrical appliances.

[0049] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not essentially depart from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A magnetic knob based on a capacitive button, characterized in that: include: Knob assembly and capacitive button assembly; The knob assembly includes an adsorption magnet, a conductor and a conductive shell; The capacitive button assembly includes a positioning magnet and a capacitive button block; The adsorption magnet and the positioning magnet are magnetically connected, thereby realizing a detachable connection between the knob assembly and the capacitive button assembly; The conductor is installed on a side of the knob assembly facing the capacitive button assembly, one end of which is connected to the housing of the knob assembly, and the other end of which is in contact with the capacitive button block of the capacitive button assembly, so as to enable the knob assembly to touch and control the capacitive button block.

2. The magnetic knob based on a capacitive button according to claim 1, characterized in that: The knob assembly also includes a base and an inner shell sleeved on the periphery of the base; wherein the outer shell sleeved on the periphery of the inner shell.

3. The magnetic knob based on a capacitive button according to claim 2, characterized in that: The base is provided with a base through hole, and the adsorption magnet is arranged in the base through hole.

4. The magnetic knob based on a capacitive button according to claim 2, characterized in that: The inner shell is an annular body, the inner wall of the inner shell is surrounded to form an inner shell through hole, and the inner shell through hole is sleeved on the periphery of the base; The inner shell is provided with a conductive through hole along the axial direction, and the conductor passes through the conductive through hole from one side of the inner shell away from the outer shell to the other side of the inner shell facing the outer shell, and is connected to the outer shell; The inner shell is also provided with screw through holes, through which screws pass to be connected with the outer shell.

5. The magnetic knob based on a capacitive button according to claim 4, characterized in that: The conductor includes a touch end and a connector fixedly connected to the touch end; the connector passes through the conductive through hole and is connected to the inner side of the housing, so that when a finger touches the housing, an electrical connection of a coupling capacitor is formed through the conductor and the capacitive button block.

6. The magnetic knob based on a capacitive button according to claim 5, characterized in that: The conductor further comprises a spring, and the connector is sleeved on the spring and passes through the conductive through hole, so that the conductor can be extended and retracted along the direction of the conductive through hole.

7. The magnetic knob based on a capacitive button according to claim 5, characterized in that: The inner side of the housing comprises: A conductor positioning hole, used for connecting with the connector; and The screw positioning hole is used to connect with the screw to achieve the connection between the outer shell and the inner shell.

8. The magnetic knob based on a capacitive button according to claim 6, characterized in that: The outer shell also includes a bearing inside, and the outer shell rotates around the central axis of the bearing; the bearing passes through the through hole of the inner shell and is connected to the base.

9. The magnetic knob based on a capacitive button according to claim 3, characterized in that: The knob assembly further includes an anti-skid pad, which is disposed on a side of the base facing the capacitive button assembly.

10. An electrical appliance, characterized in that: It comprises a magnetic knob based on a capacitive button as described in any one of claims 1 to 9.

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