Position detection module for a hob knob

Abstract

The utility model provides a kind of position detection module of range hood knob, to more accurately detect the position when knob deflection adjusts fire size, and then control light-emitting component synchronous display fire size, or signal is transmitted to range hood and makes it linkage.The position detection module includes a positioning seat fixed around the knob, a magnet with knob synchronous deflection displacement, and a signal transmission component arranged in the positioning seat for detecting the deflection position of the magnet, characterized in that: the signal transmission component includes a Hall IC with a fixed distance from the magnet, and a magnetic conducting member fixed between Hall IC and magnet, when knob and magnet synchronous deflection, the magnetic field change when the magnet deflects can be strengthened and concentrated through the magnetic conducting member, so that the Hall IC can more accurately sense the deflection position of the magnet, to synchronously control the light-emitting state of light-emitting component, or provide detection signal to external electrical equipment linkage.

Description

Technical Field

[0001] This utility model relates to a position detection module for stove knobs. The technical content involves using a magnetic conductive component to overcome the problems of sensing distance and magnetic field strength between Hall IC and magnet, thereby enabling the light-emitting component or external electrical equipment to be linked with the knob deflection to adjust the flame size. Background Technology

[0002] Traditional stoves use a single knob to adjust the flame, requiring users to bend over and look down to observe the fire, making adjustments inconvenient. To address this, the designers created a series of illuminated knobs to improve usability. These knobs feature indicator lights that change color, brightness, or illuminated area depending on the knob's position, thus simultaneously displaying the flame size and enhancing visibility and convenience.

[0003] Unlike traditional knobs that use variable resistors to detect and control rotational position, the knob detection module designed in this case uses a Hall effect IC to sense changes in the magnetic field when a magnet moves. This method of detecting the knob position using a Hall effect IC and a magnet not only allows the light-emitting component to change its light pattern according to the knob's rotation, but the detection signal can also be linked to electrical equipment such as range hoods, causing the range hood to increase or decrease its fan speed according to the heat level, effectively enhancing its functionality.

[0004] When implementing the above design, considering that neodymium magnets are rare earth elements and less environmentally friendly, and that placing them on the stove may cause the magnetic field strength to decrease due to heat, theoretically, using ferrite magnets, which have better temperature resistance and are more environmentally friendly, would be a better choice. However, the magnetic field strength of ferrite magnets is relatively weak, and they may not be sensitive enough when sensing, especially due to structural issues, the distance between the magnet and the Hall IC cannot be close enough for sensing, which may lead to imperfections in the implementation.

[0005] As can be seen from the above research process, if the problems of distance and magnetic field strength between the magnet and the Hall IC can be overcome, then whether ferrite magnets or neodymium magnets are used, magnetic field changes can be sensed more sensitively and accurately, making position detection more accurate, and thus providing synchronous linkage for light-emitting devices or range hoods. Utility Model Content

[0006] The purpose of this invention is to provide a knob position detection module suitable for use in stoves. It mainly uses a magnetic guide to overcome the problems of sensing distance and magnetic field strength between the Hall IC and the magnet. When the magnet deflects synchronously with the knob, the magnetic guide strengthens and concentrates the magnetic field change when the magnet deflects, so that the Hall IC can more accurately sense the deflection position of the magnet, thereby accurately controlling the light-emitting state of the light-emitting component, or providing the detection signal to external electrical equipment for linkage.

[0007] To achieve the above objectives, this utility model provides a stove knob position detection module. The module includes a positioning base fixed around the knob, a magnet that deflects synchronously with the knob, and a signal transmission component disposed within the positioning base. The signal transmission component includes a Hall effect IC maintaining a fixed distance from the magnet. The Hall effect IC senses changes in the magnetic field when the magnet deflects and outputs a signal through the signal transmission component, causing a light-emitting component or external electrical device to adjust the flame size in conjunction with the knob's deflection. The module is characterized by:

[0008] The signal transmission component further includes a magnetic conductor fixed between the Hall IC and the magnet. When the magnet and the knob deflect synchronously to generate a change in magnetic field, the magnetic conductor can strengthen and concentrate the change in magnetic field of the magnet onto the Hall IC.

[0009] The following further explains the implementation methods of each component:

[0010] In practice, the knob shaft is located on a gas valve shaft of the stove. The bottom of the knob is provided with a magnet seat that rotates with the knob. The magnet seat surrounds the gas valve shaft. The magnet is fixed at the bottom of the magnet seat, and the magnetic conductor and Hall IC are fixed on the positioning seat at a position relative to the outside of the magnet seat and the magnet.

[0011] In practice, the magnet is a single sintered magnet in the shape of a ring or arc, or the magnet is composed of multiple small magnets arranged in the shape of a ring or arc.

[0012] In practice, the positioning base includes a ring surrounding the bottom of the magnet base and the outer periphery of the magnet, and a receiving groove disposed on one side of the ring. The Hall IC is disposed in the receiving groove, and the receiving groove has an opening adjacent to the magnet and the magnet base, and the magnetic conductor is fixed in the opening.

[0013] In practice, the signal transmission component includes a circuit board for mounting the Hall IC and the magnetic conductor, and a signal line electrically connected to the circuit board, wherein the signal line is electrically connected to the light-emitting component or an external electrical device to control the light-emitting state of the light-emitting component.

[0014] In practice, the light-emitting component is fixed on a lamp holder, which has a bushing surrounding the knob and the magnet base, and a groove for accommodating the light-emitting component is provided around the bushing.

[0015] In practice, the groove is hook-shaped or ring-shaped, and the light-emitting component includes an LED light panel with a corresponding shape embedded in the groove, and a light-blocking sheet that shields the LED light panel. The light-blocking sheet has a curved or ring-shaped light-transmitting part that corresponds to the shape of the LED light panel.

[0016] In practice, the groove is frame-shaped and surrounds the bushing. The light-emitting component includes a frame-shaped LED light plate embedded in the groove, a light guide plate above the frame-shaped LED light plate, and a light-blocking sheet above the light guide plate. Each of the four corners of the frame-shaped LED light plate is provided with an LED bead. The light guide plate is provided with a light-guiding recess extending towards the center relative to each LED bead. The light-blocking sheet is provided with an annular light-transmitting part. When the LED beads at the four corners of the frame-shaped LED light plate emit light, the light is refracted through the light-guiding recess to make the light guide plate emit light, and then the light is transmitted upward through the annular light-transmitting part on the light-blocking sheet.

[0017] In practice, the light-emitting component, the positioning seat, and the signal transmission component are located below a panel of the stove. The panel has at least one mounting hole for the knob to protrude, and the panel has an arc-shaped or ring-shaped light display area around the mounting hole relative to the top of the light-emitting component, so that the light emitted by the light-emitting component can shine upward from the light display area.

[0018] In practice, the stove is a double-burner stove with two mounting holes on the panel. Around the two mounting holes, there are arc-shaped or ring-shaped light display areas for two sets of knobs, light-emitting components, positioning seats and signal transmission components corresponding to the two burners.

[0019] Compared to previous technologies, this invention utilizes a magnetic conductive component to concentrate the magnetic field changes of the magnet, enabling the Hall IC to accurately detect the moving position of the magnet. This not only overcomes the problems of magnetic field strength and distance that may occur when the magnet is used in a stove, but also allows the magnet to be used without restriction, using a single sintered ferrite magnet, neodymium magnet, or multiple small magnets, thus making the application range of this invention more extensive.

[0020] The following describes embodiments suitable for this utility model, based on the technical means of this utility model, and in conjunction with the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is an exploded perspective view of the present invention.

[0022] Figure 2 This is a combined sectional view of the present invention.

[0023] Figure 3 This is a top view of the present invention.

[0024] Figure 4 This is a schematic diagram (1) showing the changes in the light when the fire intensity is adjusted according to the present invention.

[0025] Figure 5This is a schematic diagram (2) showing the changes in the light when the fire intensity is adjusted according to the present invention.

[0026] Figure 6 This is an exploded perspective view of another embodiment of the present invention.

[0027] Figure 7 for Figure 6 A schematic diagram of light emission.

[0028] Figure 8 This is a schematic diagram of the present invention installed on a stove.

[0029] Explanation of reference numerals in the attached drawings: Knob 10; Gas valve shaft 11; Magnet seat 12; Positioning seat 20; Ring 21; Receiving groove 22; Opening 23; Magnet 30; Signal transmission component 40; Circuit board 41; Signal line 42; Hall IC 43; Magnetic guide 44; Light-emitting component 50; LED light board 51; Light blocking sheet 52; Light-transmitting part 53; LED lamp bead 54; Light guide plate 55; Light guide recess 56; Lamp holder 60; Bushing 61; Groove 62; Panel 70; Mounting hole 71; Light display area 72. Detailed Implementation

[0030] Figures 1 to 3 An exploded perspective view, a combined sectional view, and a top view of the stove knob position detection module of this utility model are disclosed. As shown in the figure, the stove knob position detection module of this utility model includes a positioning base 20 fixed around the lower part of a knob 10, a magnet 30 that deflects synchronously with the knob 10, and a signal transmission component 40 disposed within the positioning base 20.

[0031] The accompanying drawings also include a light-emitting component 50 that is connected to the signal transmission component 40. The light-emitting component 50 is only one of the devices that are activated after the present invention obtains a position detection signal. In practice, it can also provide the signal to other external electrical devices, such as a range hood not shown in the figure. In the accompanying drawings, it is simply referred to as the light-emitting component 50.

[0032] As shown in the figure, during implementation, the knob 10 is mounted on a gas valve shaft 11 of the stove. The bottom of the knob 10 is provided with a magnet base 12 that rotates with the knob. The magnet base 12 surrounds the gas valve shaft 11, and the magnet 30 is fixed to the bottom of the magnet base 12. When the knob 10 rotates, the gas valve shaft 11 rotates synchronously to adjust the opening of the gas valve, thereby changing the size of the stove's firepower. At the same time, the magnet 30 rotates synchronously through the magnet base 12.

[0033] The positioning base 20 includes a ring 21 surrounding the bottom of the magnet base 12 and the outer periphery of the magnet 30, and a receiving groove 22 disposed on one side of the ring 21, wherein the receiving groove 22 has an opening 23 adjacent to the magnet 30 and the magnet base 12. The signal transmission component 40 is disposed within the receiving groove 22.

[0034] The signal transmission component 40 includes a circuit board 41 located in the receiving slot 22 and a signal line 42 electrically connected to the circuit board 41. The circuit board 41 is provided with a Hall IC 43 that maintains a fixed distance from the magnet 30, and the circuit board 41 is provided with a magnetic conductor 44 near the Hall IC 43. The signal line 42 is electrically connected to the light-emitting component 50, so that the signal transmission component 40 can transmit signals to the light-emitting component 50, so that the light-emitting component can synchronously change the light-emitting mode. Of course, if the signal transmission component 40 transmits the position signal to external electrical equipment such as a range hood, then such equipment can be linked with the knob 10.

[0035] As shown in the figure, the circuit board 41 and Hall IC 43 are set in the receiving groove 22, so that the magnetic guide 44 is located at the opening 23. Then, the knob 10 causes the magnet 30 to deflect synchronously through the magnet base 12. When the firepower of the stove changes, the magnetic field change generated by the displacement of the magnet 30 can be strengthened and concentrated by the magnetic guide 44 and applied to the Hall IC 43. This allows the signal transmission component 40 to output and control the light-emitting component 50, or to provide linkage to external electrical equipment such as the range hood.

[0036] The magnetic conductive component 44 is an important element in this invention. In practice, it can be a soft magnet or other magnetically conductive material. It can strengthen and concentrate the magnetic field changes of the magnet 30 onto the Hall IC 43, thereby overcoming the distance and magnetic field strength problems between the Hall IC 43 and the magnet 30. This allows the signal transmission component 40 to more accurately detect the deflection position of the magnet 30, thereby precisely controlling the luminous state of the light-emitting component 50 to synchronously display the size of the stove fire, or to link the range hood and automatically switch the exhaust intensity synchronously.

[0037] It is worth mentioning that by strengthening and concentrating the magnetic field through the magnetic conductor 44, the material, strength, shape, and distance between the magnet 30 and the Hall IC 43 are not limited. For example, the magnet 30 can be made of neodymium magnet or ferrite magnet, and its shape can be a single ring-shaped or arc-shaped sintered magnet, or it can be composed of multiple small magnets arranged in a ring or arc. In the attached figure, the magnet 30 is only an example of a single ring-shaped sintered magnet.

[0038] Other embodiments of this utility model are further described below:

[0039] In order to make the light display intuitive when the stove adjusts the fire level, the light-emitting component 50 is fixed on a lamp holder 60. The lamp holder 60 is provided with a bushing 61 surrounding the knob 10, the magnet seat 12, and the positioning seat 20. The lamp holder 60 is provided with a groove 62 for accommodating the light-emitting component 50 at the position of the bushing 61.

[0040] In practice, as shown in the accompanying drawings, the groove 62 is hook-shaped or ring-shaped. The light-emitting component 50 includes an LED light panel 51 with a corresponding shape embedded in the groove 62, and a light-blocking sheet 52 that shields the LED light panel 51. The light-blocking sheet 52 has a curved or ring-shaped light-transmitting portion 53 corresponding to the shape of the LED light panel 51. The light panel 51 has a plurality of spaced-apart LED beads 54. In the accompanying drawings, the groove 62 and the light-emitting component 50 are only shown as hook-shaped, while the plurality of arranged LED beads 54 and the light-transmitting portion 53 are shown as corresponding curved shapes.

[0041] Therefore, when the knob is 10... Figure 4 and Figure 5 When the deflection is adjusted to control the fire intensity, the magnetic field change caused by the deflection displacement of the magnet 30 is detected by the magnetic conductor 44 and Hall IC 43 on the aforementioned signal transmission component 40. This allows the light-emitting component 50 to change its light emission mode in different positions or colors, simultaneously displaying the fire intensity. In the attached figure, only the changing light emission position of different LED beads 54 is used as an example. When the knob 10 is rotated, the light emission position of the LED beads 54 is changed simultaneously, and the light emission position is then displayed to the user through the light-transmitting part 53.

[0042] Figure 6 and Figure 7 Another embodiment of the light-emitting component 50 is disclosed. In this embodiment, the groove 62 is frame-shaped and surrounds the outer periphery of the bushing 61. The LED light panel 51 of the light-emitting component 50 is also frame-shaped and embedded in the groove 62. An LED bead 54 is provided at each of the four corners of the frame-shaped LED light panel 51.

[0043] In order to concentrate the light emitted by the four LED beads 54, a light guide plate 55 is provided above the frame-shaped LED light plate 51. The light guide plate 55 has a light guide recess 56 extending towards the center relative to the position of each LED bead 54, and the light-transmitting part 53 on the light blocking sheet 52 is ring-shaped.

[0044] When the LED beads 54 at the four corners of the frame-shaped LED light panel 51 emit light, the light can be refracted through the light guide recess 56 to make the light guide plate 55 emit light, and then the light can be transmitted upward through the annular light-transmitting part 53 on the light blocking sheet 52.

[0045] In this embodiment, the changes in the light emission mode of the light-emitting component 50 can be indicated by different brightness or color to show the intensity of the fire. For example, low brightness or orange represents a small fire, medium brightness or red represents a medium fire, high brightness or bright white, and blue represents a large fire.

[0046] like Figure 1 and Figure 8 As shown, when this utility model is installed on a stove, the aforementioned positioning base 20, magnet 30, signal transmission component 40, light-emitting component 50, lamp holder 60, etc., are arranged below a panel 70 of the stove. The panel 70 is provided with at least one mounting hole 71 for the knob 10 to protrude. The panel 70 is provided with an arc-shaped or ring-shaped light display area 72 around the mounting hole 71, relative to the position above the light-emitting component 50, so that the light emitted by the light-emitting component 50 shines upward from the light display area 72, so that the user can observe the fire level from the changes in light.

[0047] in addition, Figure 8 It is also revealed that, in conjunction with a dual-burner stove of a general household stove, the panel 70 has two mounting holes 71 for two sets of knobs 10, positioning seats 20, magnets 30, signal transmission components 40, light-emitting components 50, and lamp holders 60 to be installed in corresponding positions, so as to display the firepower of the two burners respectively; in conjunction with this embodiment, the aforementioned lamp holders 60 can be integrally formed with two bushings 61 and two grooves 62 for installation.

[0048] The above descriptions and accompanying drawings are merely illustrative examples of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. For example, the signal transmission component provides signals to external electrical equipment such as a range hood (not shown in the figures) for linkage, allowing the range hood to automatically switch its ventilation intensity as the power is adjusted by a knob; any example that is similar or identical to the purpose, structure, device, or features of the present invention should fall within the patent scope of the present invention.

Claims

1. A stove knob position detection module, comprising a positioning base fixed around the lower part of a knob, a magnet that deflects synchronously with the knob, and a signal transmission component disposed within the positioning base, wherein the signal transmission component includes a Hall effect IC maintaining a fixed distance from the magnet, the Hall effect IC being able to sense changes in the magnetic field when the magnet deflects, and outputting a signal through the signal transmission component, causing a light-emitting component or external electrical device to operate in conjunction with the knob deflection to adjust the flame size, characterized in that: The signal transmission component also includes a magnetic conductor fixed between the Hall IC and the magnet. When the magnet and the knob deflect synchronously to generate a change in magnetic field, the magnetic conductor can strengthen and concentrate the change in magnetic field of the magnet onto the Hall IC.

2. The stove knob position detection module as described in claim 1, characterized in that: The knob shaft is located on a gas valve shaft of a stove. The bottom of the knob is provided with a magnet seat that rotates with the knob. The magnet seat surrounds the gas valve shaft. The magnet is fixed to the bottom of the magnet seat. The magnetic conductor and Hall IC are fixed on the positioning seat at a position relative to the outside of the magnet seat and the magnet.

3. The stove knob position detection module as described in claim 1, characterized in that: The magnet is a single sintered magnet in the shape of a ring or arc, or the magnet is composed of multiple small magnets arranged in the shape of a ring or arc.

4. The stove knob position detection module as described in claim 2, characterized in that: The positioning base includes a ring surrounding the bottom of the magnet base and the outer periphery of the magnet, and a receiving groove disposed on one side of the ring. The Hall IC is disposed in the receiving groove, and the receiving groove has an opening adjacent to the magnet and the magnet base, and the magnetic conductor is fixed in the opening.

5. The stove knob position detection module as described in claim 4, characterized in that: The signal transmission component includes a circuit board for mounting the Hall IC and the magnetic conductor, and a signal line electrically connected to the circuit board, wherein the signal line is electrically connected to the light-emitting component or an external electrical device for linkage of the light-emitting component or the external electrical device.

6. The stove knob position detection module as described in claim 2, characterized in that: The light-emitting component is fixed on a lamp holder, which has a bushing surrounding the knob and the magnet base. The bushing has a groove for accommodating the light-emitting component.

7. The stove knob position detection module as described in claim 6, characterized in that: The groove is hook-shaped or ring-shaped. The light-emitting component includes an LED light panel with a corresponding shape embedded in the groove, and a light-blocking sheet that shields the LED light panel. The light-blocking sheet has a curved or ring-shaped light-transmitting part that corresponds to the shape of the LED light panel.

8. The stove knob position detection module as described in claim 6, characterized in that: The groove is frame-shaped and surrounds the bushing. The light-emitting component includes a frame-shaped LED light plate embedded in the groove, a light guide plate above the frame-shaped LED light plate, and a light-blocking sheet above the light guide plate. Each of the four corners of the frame-shaped LED light plate is provided with an LED bead. The light guide plate is provided with a light-guiding recess extending towards the center relative to each LED bead. The light-blocking sheet is provided with an annular light-transmitting part. When the LED beads at the four corners of the frame-shaped LED light plate emit light, the light is refracted through the light-guiding recess to make the light guide plate emit light, and then the light is transmitted upward through the annular light-transmitting part on the light-blocking sheet.

9. The stove knob position detection module as described in any one of claims 2 to 8, characterized in that: The light-emitting component, positioning base, and signal transmission component are located below a panel of the stove. The panel has at least one mounting hole for the knob to protrude, and the panel has an arc-shaped or ring-shaped light display area around the mounting hole relative to the top of the light-emitting component, so that the light emitted by the light-emitting component can shine upward from the light display area.

10. The stove knob position detection module as described in claim 9, characterized in that: The stove is a double-burner stove. The panel has two mounting holes, and the two mounting holes are surrounded by arc-shaped or ring-shaped light display areas to accommodate two sets of knobs, light-emitting components, positioning seats and signal transmission components corresponding to the two burners.

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