CN217423312U - Ignition knob and cooking utensils - Google Patents

Abstract

The utility model provides an ignition knob and cooking utensils. The ignition knob comprises a winding knob assembly, a potentiometer and a circuit board, the potentiometer further comprises a contact, a conductive piece and a pin, the contact comprises a first contact, the pin comprises a first switch pin and a second switch pin, one of the first switch pin and the second switch pin is electrically connected with the first contact, the other of the first switch pin and the second switch pin is electrically connected with the conductive piece, and the conductive piece is electrically connected with the first contact when the rotation angle of the knob assembly is within the fire power adjusting range and is disconnected with the first contact when the rotation angle is outside the fire power adjusting range; the circuit board comprises a first power supply end and a second power supply end, the circuit board is further provided with a main control chip, the main control chip comprises a first power supply pin and a second power supply pin, the first power supply end is electrically connected with the first switch pin, the second switch pin is electrically connected with the first power supply pin, and the second power supply pin is electrically connected with the second power supply end. The ignition knob having this arrangement can reduce the loss of electric power.

Description

Ignition knob and cooking utensils

Technical Field

The utility model relates to a kitchen appliance's technical field specifically relates to an ignition knob and cooking utensils that have it.

Background

The linkage of the smoke stove is one of the development trends of smart home. In the use, the cigarette machine can bring great facility for the user according to the firepower automatically regulated fan gear of cooking utensils.

The existing mode for realizing the linkage of the smoke stove is to install an ignition knob for the linkage of the smoke stove on the stove. The ignition knob, when turned, may send a signal to the range hood related to the angle of rotation. The cigarette machine adjusts according to the signal, wherein the signal sent by the ignition knob also comprises a signal for indicating shutdown.

However, when the ignition knob sends a signal indicative of shutdown, the ignition knob is not actually de-energized. Therefore, the ignition knob is actually still in operation during a period of time when the cigarette machine is shut down, and thus, the electric energy of the ignition knob is consumed.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems occurring in the prior art, according to an aspect of the present invention, there is provided an ignition knob, including a knob assembly rotatable around a central axis, a potentiometer and a circuit board, the potentiometer further including a contact, a conductive piece and a pin, the contact including a first contact, the pin including a first switch pin and a second switch pin, one of the first switch pin and the second switch pin being electrically connected with the first contact and the other being electrically connected with the conductive piece, wherein one of the conductive piece and the contact is provided on the knob assembly, the conductive piece being electrically connected with the first contact when a rotation angle of the knob assembly is within a fire adjustment range and disconnected from the first contact when the rotation angle is outside the fire adjustment range; the circuit board comprises a first power end and a second power end, a main control chip is further arranged on the circuit board, the main control chip comprises a first power pin and a second power pin, the first power end is electrically connected with the first switch pin, the second switch pin is electrically connected with the first power pin, and the second power pin is electrically connected with the second power end.

Therefore, the embodiment of the present invention provides an ignition knob can control whether the main control chip is powered on or not through the potentiometer. Taking the cigarette machine controlled by the ignition knob as an example, when a user rotates the knob assembly out of the fire adjusting range, the main control chip is powered off and stops working. When the existing ignition knob is used for rotating the knob assembly to be out of the firepower adjusting range, the main control chip is still in the power-on state, and only the main control chip generates an electric signal for controlling the cigarette machine to be shut down. Although the cigarette machine stops working, the main control chip is still in a power-on state and still generates an electric signal, which causes the loss of electric energy. For equipment which is similar to a cigarette machine and has the running time less than the shutdown time, because the ignition knob needs less time for controlling the ignition knob, the main control chip of the ignition knob is powered off when the equipment is shut down, the loss of electric energy is reduced, the energy is saved, and the service life of the ignition knob can be prolonged.

Illustratively, the potentiometer further comprises a fixed part and a rotating part, the rotating part is arranged on the knob assembly, one of the conductive piece and the contact is arranged on the knob assembly by being arranged on the rotating part, and the potentiometer is used for outputting potential information based on the rotation angle of the rotating part relative to the fixed part. With the ignition knob provided with the setting, a user can output potential information related to the rotation angle by rotating the knob assembly, so that the rotation angle of the knob assembly is reflected.

Exemplarily, the circuit board further comprises a knob communication device, the knob communication device comprises a third power pin, a fourth power pin and a data receiving pin, the main control chip further comprises a data output pin, the third power pin is electrically connected with the first power pin, the fourth power pin is electrically connected with the second power pin, the data output pin is electrically connected with the data receiving pin, and the main control chip is further configured to control the knob communication device to transmit potential information at a predetermined frequency or determine a rotation angle of the knob assembly based on the potential information and control the knob communication device to transmit at the predetermined frequency. The embodiment of the utility model provides an ignition knob can still make the equipment under control stop work under the condition of master control chip outage.

Exemplarily, the contacts further include n second contacts, the pins further include n signal output pins electrically connected to the n second contacts in a one-to-one correspondence, where n is an integer greater than 1, the conductive members are electrically connected to different second contacts and correspond to different rotation angles of the knob assembly within the fire power adjustment range, the main control chip further includes n signal input pins, the n signal input pins are electrically connected to the n signal output pins in a one-to-one correspondence, and the rotation angle information is represented by potential information of the n signal output pins. The embodiment of the utility model provides an ignition knob can pass through the potentiometre with knob subassembly pivoted angle and transmit to main control chip. Under the condition that the gear to controlled equipment is not many, the signal output pin quantity of potentiometre can satisfy the application demand, for setting up angle detection subassembly, can reduce the operand, improves main control chip's arithmetic speed, moreover, for setting up angle detection subassembly, can also reduce product cost.

The pins are arranged on the rotating part, and the circuit board is arranged on the knob assembly, so that the pins can be conveniently connected with elements such as the circuit board.

Illustratively, the circuit board further includes a ground terminal and n first resistors electrically connected between the n signal output pins and the ground terminal in a one-to-one correspondence. Therefore, the voltage value input to the signal input pin can be reduced, and the use of the main control chip is met.

Illustratively, the circuit board further comprises n second resistors, and the n second resistors are electrically connected between the n signal input pins and the n signal output pins in a one-to-one correspondence. Therefore, the current limiting function can be achieved on the corresponding signal input pins so as to meet the rated working current of each signal input pin of the main control chip, and meanwhile, the main control chip can also be protected.

Illustratively, n is 2, the fire adjustment range is 10 degrees to 240 degrees, the conductive member is not in electrical contact with any second contact when the rotation angle is within the range of 10 degrees to 125 degrees, the conductive member is in electrical contact with one second contact when the rotation angle is within the range of 125 degrees to 180 degrees, and the conductive member is in electrical contact with two second contacts when the rotation angle is within the range of 180 degrees to 240 degrees. With the ignition knob of this arrangement, the user can clearly understand the correlation of the ignition knob rotation angle with the transmitted electric signal.

Illustratively, the ignition knob further comprises a battery holder having two power output terminals and two battery contacts connected in one-to-one correspondence with the two power output terminals, the two power output terminals being electrically connected in one-to-one correspondence with the first power terminal and the second power terminal, respectively. Through setting up the battery holder, can reduce the restriction of ignition knob when using, facilitate the use.

According to another aspect of the utility model, a cooking utensils is provided, it includes cooking utensils panel and valve body subassembly, the valve body subassembly is including setting up the valve body in cooking utensils panel below and the valve rod that passes the cooking utensils panel, and cooking utensils still includes any kind of ignition knob in the above, and the knob subassembly is connected to the valve rod in the top of cooking utensils panel.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is an assembly view of an ignition knob and a cooktop panel according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the ignition knob shown in FIG. 1;

FIGS. 3-4 are schematic diagrams of potentiometers according to various exemplary embodiments of the present invention;

fig. 5 is a perspective view of a potentiometer according to an exemplary embodiment of the present invention;

fig. 6 is a schematic circuit diagram of an ignition knob according to an exemplary embodiment of the present invention;

fig. 7 is a schematic circuit diagram of a potentiometer according to an exemplary embodiment of the present invention;

fig. 8 is a circuit schematic diagram of a master control chip according to an exemplary embodiment of the present invention;

fig. 9 is a circuit schematic diagram of a knob communication device according to an exemplary embodiment of the present invention and

fig. 10 is a circuit schematic diagram of a battery holder according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an ignition knob; 100. a knob assembly; 200. a potentiometer; 210. a contact point; 211. a first contact; 212. a second contact; 220. a pin; 221. a first switch pin; 222. a second switch pin; 223. a signal output pin; 230. a conductive member; 250. a fixed part; 260. a rotating part; 300. a circuit board; 301. a first power supply terminal; 302. a second power supply terminal; 303. a ground terminal; 310. a main control chip; 311. a first power supply pin; 312. a second power supply pin; 313. a signal input pin; 314. a data output pin; 320. a knob communication device; 321. a third power supply pin; 322. a fourth power supply pin; 323. a data receiving pin; 330. a first resistor; 340. a second resistor; 400. a battery holder; 410. a power supply output terminal; 420. a battery contact; 510. a valve stem; 520. a cooking utensils panel.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

In accordance with one aspect of the present invention, an ignition knob 10 is provided, as shown in fig. 1-2. The ignition knob 10 may be mounted to the top of the cooktop panel 520 to facilitate its operation by a user.

The ignition knob 10 may include a knob assembly 100 rotatable about a central axis, a potentiometer 200, and a circuit board 300. The central axis may be the axis of rotation of the ignition knob 10.

Illustratively, the knob assembly 100 may be used in conjunction with a valve stem 510. The user may rotate the valve stem 510 by rotating the knob assembly 100. The knob assembly 100 may also serve as a carrier for connecting the potentiometer 200 and carrying the circuit board 300.

As shown in fig. 3-5, potentiometer 200 may include a contact 210, a conductive member 230, and a pin 220. The contacts 210 may include a first contact 211. The pins 220 may include a first switch pin 221 and a second switch pin 222, as shown in fig. 5. One of the first and second switch pins 221 and 222 may be electrically connected to the first contact 211, and the other may be electrically connected to the conductive member 230. Wherein one of the conductive member 230 and the contact 210 may be disposed on the knob assembly 100. That is, one of the conductor 230 and the contact 210 may rotate with the knob assembly 100. When the rotation angle of the knob assembly 100 is within the fire power adjustment range, the conductive member 230 may be electrically connected to the first contact 211. When the rotation angle of the knob assembly 100 is out of the fire power adjustment range, the conductive member 230 may be disconnected from the first contact 211. Take the example where the knob assembly 100 is rotated to adjust the fire power. If the fire power is adjusted in an angle range of 10 to 240 degrees, the conductive member 230 may be electrically connected to the first contact 211 when the knob assembly 100 is rotated in an angle range of 10 to 240 degrees. Beyond the range of 10-240 degrees, the conductive member 230 is disconnected from the first contact 211.

Fig. 3 and 4 show various exemplary ground diagrams of the potentiometer 200. In fig. 3, the conductive member 230 may have an arc-shaped plate shape, and a plurality of contacts 210 (which will be described in detail below) may be distributed around the potentiometer 200 around the central axis. The conductive member 230 may rotate around the central axis. The conductive member 230 may be electrically connected to the plurality of contacts 210 in sequence during the rotation.

In fig. 4, a plurality of contacts 210 may also be arranged in sequence along the radial direction of the potentiometer 200. The conductive elements 230 may be annular conductive strips having different widths. The conductive member 230 may sequentially contact one or more contacts 210 from the outside to the inside when rotating.

Of course, it is understood that in the potentiometer 200, the positions and shapes of the conductive member 230 and the contact 210 may also have various patterns, which are not illustrated, and those skilled in the art can reasonably select the positions and shapes according to the use requirement.

As shown in fig. 6-8, the circuit board 300 may include a first power supply terminal 301 and a second power supply terminal 302. The first power terminal 301 and the second power terminal 302 may be used to connect a power source for powering components on the circuit board 300. For example, the first power terminal 301 and the second power terminal 302 may connect the positive and negative poles of the power source. The circuit board 300 may further have a main control chip 310 disposed thereon. The main control chip 310 may include a first power pin 311 and a second power pin 312. When the first power pin 311 and the second power pin 312 are connected to a power source, the main control chip 310 is powered on to operate.

In the circuit board 300, the first power terminal 301 on the circuit board 300 may be electrically connected to the first switch pin 221 on the potentiometer 200. The second switch pin 222 on the potentiometer 200 may be electrically connected to the first power pin 311 on the main control chip 310. The second power pin 312 on the main control chip 310 may be electrically connected with the second power terminal 302 on the circuit board 300. The manner of connection may include the use of printed circuits, may include the use of wires, etc. The first power terminal 301 and the second power terminal 302 may be connected to a power source. The user can control whether the main control chip 310 is powered on to work by rotating the knob assembly 100. When the knob assembly 100 is rotated to a position outside the fire power adjustment range, the conductive member 230 is disconnected from the first contact 211, a loop cannot be formed in the circuit board 300, and the main control chip 310 cannot be powered on. When the knob assembly 100 is rotated to a fire power adjustment range, the conductive member 230 is electrically connected to the first contact 211, a loop can be formed among the first power supply terminal 301, the second power supply terminal 302, the potentiometer 200 and the main control chip 310, and the main control chip 310 can be powered on to operate.

The ignition knob 10 having the main control chip 310 may have various functions. If the main control chip 310 is connected to the ignition system of the cooking bench, the user may control the burner of the cooking bench to ignite when the knob assembly 100 is rotated to the fire power adjustment range. If the main control chip 310 is connected with the range hood system, the user can control the range hood to start when the knob assembly 100 is rotated to be within the fire power adjusting range. When the knob assembly is rotated to a position outside the fire power adjustment range, the main control chip 310 is in a power-off state and stops working, and thus the devices cannot be controlled.

Therefore, the ignition knob 10 of the embodiment of the present invention can control whether the main control chip 310 is powered on or not through the potentiometer 200. Taking the cigarette machine controlled by the ignition knob 10 as an example, when the user rotates the knob assembly 100 out of the fire power adjustment range, the main control chip 310 is powered off and stops working. In the conventional ignition knob 10, when the knob assembly is turned to a position outside the fire power adjustment range by the user, the main control chip 310 is still in the power-on state, but the main control chip 310 generates an electrical signal for controlling the cigarette machine to be turned off. Although the cigarette machine stops working, the main control chip is still in a power-on state and still generates an electric signal, which causes the loss of electric energy. For a device similar to a cigarette machine, in which the running time is less than the shutdown time, since the time required for controlling the ignition knob 10 is also very short, the main control chip 310 of the ignition knob 10 may be powered off when the device is shutdown, so as to reduce the power consumption, save energy, and prolong the service life of the ignition knob 10.

Illustratively, as shown in fig. 5, the potentiometer 200 may further include a fixed portion 250 and a rotating portion 260. The rotation part 260 may be provided on the knob assembly 100. One of the conductive member 230 and the contact 210 may be provided on the knob assembly 100 by being provided on the rotation part 260. The potentiometer 200 may be used to output potential information based on a rotation angle of the rotating part 260 with respect to the fixing part 250.

In some embodiments, the rotating portion 260 may be pivotably connected about the fixed portion 250. The contact 210 may be disposed on the rotating part 260, and the conductive member 230 may be disposed on the fixing part 250. Thus, when the knob assembly 100 is rotated, the user can rotate the rotating portion 260, so that the conductive member 230 and the contact 210 are relatively displaced. When the rotation angle of the knob assembly 100 is within the fire power adjustment range, the main control chip 310 is powered on, thereby realizing the functions of the ignition knob 10 hereinafter.

In some embodiments, multiple micro-switches may be disposed at different locations on the potentiometer 200, and may be turned on as the knob assembly 100 is rotated. The conductive micro switch can output a high level on the corresponding signal output pin 223, and the rotation angle of the fixing portion 250 relative to the rotating portion 260 can be reflected according to the potential information generated by the micro switches. In other embodiments, a hall sensor and a magnetic member for detecting a distance may be further provided on the potentiometer 200. Among them, one of the hall sensor and the magnetic member may be disposed on the fixing portion 250, and the other may be disposed on the rotating portion 260. The hall sensor may generate different potential information when the fixed portion 250 is rotated relative to the rotating portion 260 by a distance change, and may output potential information representing a knob angle on a signal output pin 223 to which the hall sensor is connected.

With the ignition knob thus provided, the user can output potential information relating to the rotation angle by rotating the knob assembly 100, thereby reflecting the rotation angle of the knob assembly 100.

Illustratively, as shown in fig. 9, the circuit board 300 may further include a knob communication device 320. The knob communication device 320 may include a third power pin 321, a fourth power pin 322, and a data receiving pin 323. The master chip 310 may also include data output pins 314. The third power pin 321 may be electrically connected to the first power pin 311. The fourth power pin 322 may be electrically connected with the second power pin 312. The data output pin 314 may be electrically connected with the data receiving pin 323. The main control chip 310 may also be used to control the knob communication device 320 to transmit the potential information at a predetermined frequency or determine the rotation angle of the knob assembly based on the potential information and control the knob communication device 320 to transmit at a predetermined frequency. The third power pin 321 and the fourth power pin 322 may be used to power up the knob communication device 320 when the main control chip 310 is powered up. The data receiving pin 323 can be used to receive the information transmitted by the data output pin 314 from the main control chip 310.

In some embodiments, the main control chip 310 may transmit the potential information related to the rotation angle to the knob communication device 320 through the data output pin 314, and control the knob communication device 320 to transmit the potential information. In other embodiments, the main control chip 310 may also calculate the potential information related to the rotation angle to generate rotation angle information, transmit the rotation angle information to the knob communication device 320 through the data output pin 314, and control the knob communication device 320 to transmit the rotation angle information.

The main control chip 310 may also control the knob communication device 320 to transmit the currently received potential information or rotation angle information (hereinafter, collectively referred to as information) at a predetermined frequency. After the receiver at the receiving end receives the information, the receiver at the receiving end can control the device at the receiving end. In embodiments where the cigarette machine is controlled with the ignition knob 10, the knob communication device 320 may send the received potential information at a frequency of once per minute after power-up. The receiver on the cigarette machine can control the starting and stopping or the rotating speed of the fan after receiving the potential information. If the potential information transmitted from the knob communication means 320 is not received within one minute, the range hood can determine that the ignition knob 10 is turned to a region outside the fire power adjustment range, the ignition knob 10 is in the off state, and the range hood will stop operating. It is understood that the knob communication device 320 may send default information, such as information indicating power-on, transmitted by the main control chip 310 after power-on operation. The embodiment of the present invention provides an ignition knob 10 that can still stop the controlled device when the main control chip 310 is powered off.

The knob communication device 320 may include any communication device that is or may come into existence in the future. In this embodiment, since the ignition knob 10 is close to the range hood, communication can be achieved using a short-range wireless communication technique. For example, communication between the range hood and the ignition knob 10 may be implemented using Bluetooth technology, Near Field Communication (NFC) technology, infrared communication (IrDA) technology, or the like. Through setting up knob communication device, can reduce the wiring, practice thrift cigarette machine design space, be favorable to improving the clean and tidy nature of cigarette machine and ignition knob.

Illustratively, the contacts 210 may also include n second contacts 212. The pin 220 may also include n signal output pins 223. The n signal output pins 223 may be electrically connected with the n second contacts 212 in a one-to-one correspondence. Wherein n may be an integer greater than 1. The conductive member 230 may be electrically connected with different second contacts 212 corresponding to different rotation angles of the knob assembly 100 within the fire power adjustment range. That is, when the knob assembly 100 is rotated to different angles, the conductors 230 may be electrically connected to different second contacts 212.

The main control chip 310 may further include n signal input pins 313. The n signal input pins 313 may be electrically connected with the n signal output pins 223 in a one-to-one correspondence. The rotation angle information may be represented by potential information of the n signal output pins 223. In some embodiments, the n signal output pins 223 may generate different levels when the knob assembly 100 is rotated to different angles. Then, the main control chip 310 will also receive the potential information of different rotation angles expressed by levels high and low through the n signal input pins 313.

Therefore, the ignition knob 10 according to the embodiment of the present invention can transmit the rotation angle of the knob assembly 100 to the main control chip 310 through the potentiometer 200. Under the condition that the gear positions of the controlled device are not too many, the number of the signal output pins 223 of the potentiometer 200 can meet the application requirement, and compared with the arrangement of the angle detection assembly, the calculation amount can be reduced, the calculation speed of the main control chip 310 is improved, and compared with the arrangement of the angle detection assembly, the product cost can be reduced.

Illustratively, the pins 220 may be all disposed on the rotating portion 260. The circuit board 300 may be disposed on the knob assembly 100. Thus, during rotation of the knob assembly 100, the rotation portion 260 is driven to rotate, so that the valve stem 510 rotates at the same angle as the ignition knob 10. In addition, the pins 220 are disposed on the rotating portion 260, so that the pins 220 can be conveniently connected to components such as the circuit board 300.

Illustratively, the circuit board 300 may further include a ground terminal 303 and n first resistors 330. The n first resistors 330 may be electrically connected between the n signal output pins 223 and the ground terminal 303 in a one-to-one correspondence. As shown in fig. 6 to 7, the first resistor 330 and the n signal input pins 313 on the main control chip 310 may be connected in parallel, and each first resistor 330 may perform a voltage division function on the corresponding signal input pin 313 to reduce the voltage value input to the signal input pin 313, so as to meet the usage of the main control chip 310.

Illustratively, the circuit board 300 may further include n second resistors 340. The n second resistors 340 may be electrically connected between the n signal input pins 313 and the n signal output pins 223 in one-to-one correspondence. The second resistors 340 may be connected in series with the signal input pins 313 on the main control chip 310, and each second resistor 340 may perform a current limiting function on the corresponding signal input pin 313, so as to satisfy a rated operating current of each signal input pin 313 of the main control chip 310, and simultaneously, may also perform a protection function on the main control chip 310.

Illustratively, n is 2. The fire power adjusting range can be 10-240 degrees. Conductive element 230 may not be in electrical contact with any of second contacts 212 when rotated through an angle in the range of 10-125 degrees. The conductive member 230 may electrically contact one of the second contacts 212 when rotated within a range of 125 degrees to 180 degrees. The conductive member 230 may also be in electrical contact with the two second contacts 212 when rotated within a range of 180-240 degrees.

The following description will be made in detail by taking the examples shown in table 1, fig. 3, and fig. 6 as examples.

The range of rotation of the knob assembly 100 may be 0-240. It should be noted that the first switch pin 221 may be commonly connected to the first power supply terminal 301 through the conductive member 230. The second switch pin 222 is commonly connected to the second power terminal 302.

As can be seen from table 1 and fig. 3, when the knob assembly 100 is rotated within the range of 0 ° to 10 °, the conductive member 230 is in an open state with the first contact 211, the first second contact, and the second contact. At this time, the main control chip 310 is in a power-off state, and the main control chip 310 will not send any signal to the cigarette machine.

When the knob assembly 100 is rotated to a range of 10 degrees to 125 degrees, the conductive member 230 may be connected to the first contact 211, and current may sequentially pass through the first contact 211 and the second switch pin 222 electrically connected to the first contact 211, so that the main control chip 310 is powered on to operate.

When the knob assembly 100 is rotated to a range of 125 deg. -180 deg., the conductive member 230 will also be connected to the first and second contacts, so that the signal output pin 223 correspondingly connected to the contacts generates a high level. When the signal input pin 313 correspondingly connected to the signal output pin 223 receives a high level, the main control chip 310 may generate information representing the rotation angle of the knob assembly 100.

Upon rotation of the knob assembly 100 to 10-125, the ignition knob may send an electrical signal to the range hood that is indicative of a fire. When the knob assembly 100 is rotated to 125-180, the ignition knob may send an electrical signal to the range hood that is indicative of a small fire. Of course, in cooktops where some valve stems can be rotated to 240 °, the knob assembly, when rotated to 180 ° -240 °, can also continue to send electrical signals indicative of small fires. Thereby, the knob assembly 100 can be suitable for various cookers.

TABLE 1

It will be appreciated that the description in table 1 is merely one example of electrical signals sent by the ignition knob at different angles of rotation. The person skilled in the art can also make reasonable selections according to the actual use requirements.

With the ignition knob thus provided, the user can clearly understand the correlation of the rotation angle of the ignition knob 10 with the transmitted electric signal.

Illustratively, as shown in fig. 10, the ignition knob 10 may further include a battery holder 400. The battery holder 400 may have two power outputs 410 and two battery contacts 420. The two power outputs 410 may be electrically connected to the two battery contacts 420 in a one-to-one correspondence. The two power supply output terminals 410 are also electrically connected to the first power supply terminal 301 and the second power supply terminal 302, respectively, in a one-to-one correspondence. The battery holder 400 may be used to mount a battery. In some embodiments, the battery contacts 420 may include metal tabs for connecting the positive and negative poles of the battery, respectively. By providing the battery holder 400, the restriction of the ignition knob 10 in use can be reduced, and the use is facilitated.

According to another aspect of the utility model, a cooking utensil is provided. The cooktop can include a cooktop panel 520, a valve body assembly, and any of the ignition knobs 10 described above. The valve body assembly may include a valve body disposed below the cooktop panel 520 and a valve stem 510 passing through the cooktop panel 520. The ignition knob 10 is connected to the valve stem 510 above the cooktop panel 520. The ignition knob 10 can operate the valve rod 510 to rotate so as to adjust the fire power of the stove. The ignition knob 10 can transmit corresponding rotation angle information corresponding to the current rotation angle while adjusting the fire power of the cooker.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

For ease of description, relative terms of regions such as "above … …", "above … …", "above … …", "above", and the like may be used herein to describe the regional positional relationship of one or more components or features with other components or features as illustrated in the figures. It is to be understood that the relative terms of the regions are intended to encompass not only the orientation of the element as depicted in the figures, but also different orientations in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that many variations and modifications may be made in accordance with the teachings of the present invention, all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An ignition knob is characterized by comprising a knob component which can rotate around a central axis, a potentiometer and a circuit board,

the potentiometer further comprises a contact, a conductive piece and a pin, wherein the contact comprises a first contact, the pin comprises a first switch pin and a second switch pin, one of the first switch pin and the second switch pin is electrically connected with the first contact, and the other of the first switch pin and the second switch pin is electrically connected with the conductive piece, wherein one of the conductive piece and the contact is arranged on the knob assembly, and the conductive piece is electrically connected with the first contact when the rotation angle of the knob assembly is within a fire power adjusting range and is disconnected with the first contact when the rotation angle is outside the fire power adjusting range; and is

The circuit board comprises a first power supply end and a second power supply end, a main control chip is further arranged on the circuit board and comprises a first power supply pin and a second power supply pin, the first power supply end is electrically connected with the first switch pin, the second switch pin is electrically connected with the first power supply pin, and the second power supply pin is electrically connected with the second power supply end.

2. The ignition knob according to claim 1, wherein the potentiometer further comprises a fixed portion and a rotating portion, the rotating portion is provided on the knob assembly, the one of the conductive member and the contact is provided on the knob assembly by being provided on the rotating portion, and the potentiometer is configured to output potential information based on a rotation angle of the rotating portion with respect to the fixed portion.

3. The ignition knob according to claim 2, wherein the circuit board further comprises a knob communication device, the knob communication device comprises a third power pin, a fourth power pin and a data receiving pin, the main control chip further comprises a data output pin, the third power pin is electrically connected to the first power pin, the fourth power pin is electrically connected to the second power pin, the data output pin is electrically connected to the data receiving pin, and the main control chip is further configured to control the knob communication device to transmit the potential information at a predetermined frequency or determine a rotation angle of the knob assembly based on the potential information and control the knob communication device to transmit at a predetermined frequency.

4. The ignition knob according to claim 2, wherein the contacts further include n second contacts, the pins further include n signal output pins electrically connected to the n second contacts in a one-to-one correspondence, where n is an integer greater than 1, the conductive members being electrically connected to different second contacts corresponding to different rotation angles of the knob assembly within the fire power adjustment range,

the main control chip further comprises n signal input pins, the n signal input pins are electrically connected with the n signal output pins in a one-to-one correspondence mode, and the rotation angle information is represented by potential information of the n signal output pins.

5. The ignition knob of claim 4 wherein said pins are each disposed on said turning portion and said circuit board is disposed on said knob assembly.

6. The ignition knob of claim 4, wherein said circuit board further comprises a ground terminal and n first resistors, said n first resistors being electrically connected between said n signal output pins and said ground terminal in a one-to-one correspondence.

7. The ignition knob of claim 4 wherein said circuit board further comprises n second resistors electrically connected between said n signal input pins and said n signal output pins in a one-to-one correspondence.

8. The ignition knob according to claim 4, wherein n is 2, said fire power adjusting range is 10 degrees to 240 degrees, said conductive member is not in electrical contact with any second contact when said rotation angle is within a range of 10 degrees to 125 degrees, said conductive member is in electrical contact with one second contact when said rotation angle is within a range of 125 degrees to 180 degrees, and said conductive member is in electrical contact with two second contacts when said rotation angle is within a range of 180 degrees to 240 degrees.

9. The ignition knob of claim 1 further comprising a battery holder having two power outputs electrically connected in one-to-one correspondence with said first power terminal and said second power terminal, and two battery contacts connected in one-to-one correspondence with said two power outputs.

10. A cooktop comprising a cooktop panel and a valve body assembly comprising a valve body disposed below the cooktop panel and a valve stem passing through the cooktop panel, characterized in that the cooktop further comprises an ignition knob of any of claims 1-9, the knob assembly being connected to the valve stem above the cooktop panel.

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