Knob assembly, gas valve and gas stove

Abstract

This invention discloses a knob assembly, a gas valve, and a gas stove. The knob assembly includes a first knob, a second knob, ..., an Nth knob with successively decreasing diameters, where N is a positive integer greater than or equal to 2. The first knob is used to connect to a flow regulating device. The knob assembly has a coarse adjustment mode and N-1 fine adjustment modes. In coarse adjustment mode, the first knob rotates as the driving wheel. In the first fine adjustment mode, the second knob is connected to the first knob and can rotate synchronously, with the second knob acting as the driving wheel to rotate the first knob. In the (N-1)th fine adjustment mode, the Nth knob is connected to the first knob and can rotate synchronously, with the Nth knob acting as the driving wheel to rotate the first knob. When the knobs of different diameters rotate synchronously, the rotation angle of the knob with the larger diameter will be smaller than that of the knob with the smaller diameter, thus allowing the knob assembly to have a coarse adjustment mode and multiple fine adjustment modes.

Description

Technical Field

[0001] This invention relates to the field of gas equipment technology, specifically to a knob assembly, a gas valve, and a gas stove. Background Technology

[0002] Adjusting the flame level is an essential step in using a gas stove, as different flame levels cater to different cooking needs. The flame level of a gas stove is adjusted through the gas valve's flow regulator. Specifically, controlling the opening size of the flow regulator controls the gas flow, thereby adjusting the flame level.

[0003] Users typically adjust the flow rate control opening by rotating a knob on the gas stove panel, thus changing the flame intensity. However, even a small rotation angle can result in a significant change in the ventilation area, and the angle that is convenient for the hand to adjust is relatively large, making it difficult to adjust the ventilation volume accurately. This is especially true when there are special flame settings (such as low flame on the inner ring and high flame on the outer ring, or both inner and outer rings being low flame), making it difficult for users to precisely adjust to these special flame settings.

[0004] In existing technologies, knobs typically only have a coarse adjustment function. When users rotate the knob to adjust the heat level, the knob's poor rotation accuracy makes it easy to over-rotate or under-rotate, resulting in insufficient heat for cooking and affecting the user experience. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor rotation accuracy of the knob in the prior art, which is easy to over-rotate or under-rotate, and to provide a knob assembly, a gas valve and a gas stove.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A knob assembly includes a first knob, a second knob, ... an Nth knob with successively decreasing diameters, where N is a positive integer greater than or equal to 2, and the first knob is used to connect to a flow regulating device;

[0008] The knob assembly has N-1 fine-tuning modes;

[0009] When in the first fine-tuning mode, the second knob and the first knob are configured to have a transmission connection and be able to rotate synchronously, with the second knob acting as the drive wheel to drive the first knob to rotate.

[0010] When in the (N-1)th fine-tuning mode, the Nth knob and the first knob are configured to have a transmission connection and be able to rotate synchronously. The Nth knob acts as the driving wheel to drive the first knob to rotate.

[0011] In this design, by establishing a transmission connection between multiple knobs of different diameters, when these knobs rotate synchronously, the larger diameter knob will rotate at a smaller angle than the smaller diameter knob. This allows the knob assembly to have multiple fine-tuning modes. Specifically, by rotating any knob with a diameter smaller than the first knob, different degrees of fine-tuning can be achieved based on the diameter ratio of any knob to the first knob. This improves the accuracy of the knob assembly's rotation angle and, consequently, enables precise control of the gas flow rate.

[0012] Preferably, the first knob, the second knob, ... the Nth knob all have a working surface for engaging transmission, and the working surface is provided with a plurality of gear teeth, and the first knob, the second knob, ... the Nth knob are connected to each other through the gear teeth transmission.

[0013] In this solution, the transmission connection is achieved through gear meshing, which on the one hand improves the reliability and stability of the transmission, and on the other hand can transmit the movement between any two axes in space, thereby improving the design flexibility of the knob assembly.

[0014] Preferably, the first knob, the second knob...the Nth knob are sequentially meshed with each other via the gear teeth;

[0015] When the second knob is turned, the first knob rotates synchronously with the second knob;

[0016] When the Nth knob is turned, the first knob rotates synchronously with the Nth knob.

[0017] In this solution, compared to using other auxiliary structures to achieve transmission between knobs, the first knob, the second knob, ... the Nth knob are directly meshed with each other, which makes the transmission relationship simpler, helps to reduce the probability of transmission errors or transmission failures, and thus helps to ensure the reliability of the knob assembly.

[0018] Preferably, the first knob...the (N-1)th knob is provided with a receiving cavity for accommodating the second knob...the Nth knob, and the outer wall surface of the second knob...the Nth knob and the cavity wall of the receiving cavity are provided with the gear teeth, and the gear teeth on the outer wall surface of the second knob...the Nth knob respectively mesh with the gear teeth on the cavity wall of the receiving cavity of the first knob...the (N-1)th knob.

[0019] In this design, the internal space of a larger diameter knob is cleverly utilized to house a smaller diameter knob, which improves the structural compactness of the knob assembly and reduces its footprint.

[0020] Preferably, the knob assembly further includes a support rod, and the second knob...the Nth knob are all rotatably connected to the gas valve via the support rod. The bottom surface of the receiving cavity of the first knob...the (N-1)th knob is provided with a clearance groove, the clearance groove is for the support rod to pass through, and the shape of the clearance groove is adapted to the movement path of the support rod.

[0021] In this design, a support rod provides support for the knob, preventing instability when the second knob...the Nth knob is rotated. An obstacle groove is provided; firstly, the support rod can pass through the groove to connect with the gas valve below, facilitating positioning; secondly, the obstacle groove provides movement space for the support rod, ensuring smooth rotation of the knob when a smaller diameter knob rotates relative to a larger diameter knob, without being restricted by the support rod.

[0022] Preferably, the knob assembly further includes a baffle, and the baffle is provided between the bottom surface of the receiving cavity of the second knob and the first knob... and between the bottom surface of the receiving cavity of the Nth knob and the (N-1)th knob, and the baffle is fixedly connected to the second knob... and the Nth knob;

[0023] As the support rod moves along the clearance groove, the baffle moves synchronously with the support rod and always blocks the clearance groove.

[0024] In this design, the baffle moves synchronously with the support rod and always blocks the clearance groove, which helps to prevent liquid from the gas stove panel from flowing into the gas valve through the clearance groove, thereby improving safety.

[0025] Preferably, the sidewall of the receiving cavity is provided with an opening, and the moving path of the baffle is projected radially onto the first knob within the range of the opening.

[0026] In this design, the extension length of the opening depends on the movement path of the baffle. In this way, when the baffle moves with the knob, the situation where the knob cannot be turned due to the restriction of the cavity wall by the baffle can be avoided.

[0027] Preferably, the bottom surface of the receiving cavity gradually slopes away from the baffle from the side away from the opening toward the opening;

[0028] Alternatively, the bottom surface of the receiving cavity gradually slopes away from the baffle from the center outwards.

[0029] In this design, the opening on the side wall of the receiving cavity can also serve as an overflow outlet, allowing the liquid inside the receiving cavity to flow naturally along the sloping bottom surface to the opening, eliminating the need for the user to drain or clean the liquid. This improves the ease of use and lifespan of the knob assembly.

[0030] Preferably, the first knob, the second knob, ... the Nth knob are all provided with scale markings, and the scale markings are respectively arranged along the circumference of the first knob, the second knob, ... the Nth knob.

[0031] In this solution, by setting scale markings, on the one hand, the angle can correspond to the scale markings, which is beneficial to the convenience of users and makes it easier for users to adjust the knob to the corresponding scale according to the actual angle needs; on the other hand, since some changes in firepower will not show much change in the flame pattern, it is impossible to judge whether the adjustment is in place by the human eye, but the scale can clearly show the change in firepower.

[0032] Preferably, the knob assembly includes a transmission structure, wherein there is a gap between the first knob and the second knob... between the first knob and the Nth knob, and the first knob and the second knob... are connected by the transmission structure.

[0033] In this solution, the transmission structure is used to realize the transmission between knobs. It can also realize the turning of knobs with different diameters at different angles. Especially when there are many fine adjustment modes, the transmission structure helps to make the overall structure of the knob assembly more compact.

[0034] Preferably, the knob assembly also has a coarse adjustment mode, in which the first knob rotates as the drive wheel.

[0035] This solution features both coarse and fine adjustment modes, which not only ensures accuracy but also improves operational efficiency. Specifically, coarse adjustment allows the knob assembly to quickly approach the desired rotation angle, while fine adjustment refines the precision.

[0036] Preferably, the second knob...the Nth knob is configured to be movable relative to the first knob. When in coarse adjustment mode, the first knob and the second knob...the first knob and the Nth knob all have a non-transmission connection relationship.

[0037] In this design, the torque will not increase when the first knob is turned, and the addition of other knobs will not have a negative impact on the rotation of the first knob.

[0038] Preferably, the first knob, the second knob...the Nth knob are sequentially engaged with each other;

[0039] Along the axial direction of the first knob, there is at least a gap between the teeth of the first knob and the teeth of the second knob, and / or, along the radial direction of the first knob, there is at least a gap between the teeth of the first knob and the teeth of the second knob.

[0040] In this solution, by creating a gap between the teeth of the first knob and the teeth of the second knob in terms of height or horizontal direction, the first knob will not be affected by other knobs during coarse adjustment, thus avoiding negative impacts.

[0041] Preferably, the first knob...the (N-1)th knob has a receiving cavity inside for accommodating the second knob...the Nth knob respectively;

[0042] From the bottom of the receiving cavity toward the direction away from the bottom surface, at least the receiving cavity of the first knob sequentially includes a frame layer and a gear tooth layer, the gear tooth layer being provided with the gear teeth, and when in coarse adjustment mode, the gear teeth of the second knob are located in the frame layer.

[0043] In this solution, the height difference between the upper and lower levels of the frame is cleverly utilized to ensure that there is no transmission connection between the first knob and other knobs in the coarse adjustment mode.

[0044] A gas valve includes a flow regulating device, and the gas valve further includes a knob assembly as described above, the knob assembly being connected to the flow regulating device to regulate the gas flow rate.

[0045] In this solution, by controlling the flow regulating device of the gas valve through the aforementioned knob assembly, precise control of the gas flow rate can be achieved, enabling the gas valve to handle a wider range of gas flow rates.

[0046] A gas stove, the gas stove including the gas valve as described above.

[0047] In this solution, when the gas stove uses the aforementioned gas valve, it can simultaneously offer a coarse adjustment mode and multiple fine adjustment modes. Turning the largest diameter knob (the first knob) enables coarse adjustment; turning any knob with a smaller diameter allows for different degrees of fine adjustment based on the diameter ratio between each knob and the first knob. This improves the accuracy of the knob assembly's rotation angle, thereby enabling precise control of the gas flow. Furthermore, the simultaneous availability of coarse and fine adjustment modes, while ensuring accuracy, also improves operational efficiency. Specifically, coarse adjustment allows the knob assembly to quickly approach the desired rotation angle, followed by fine adjustment to refine the precision.

[0048] The positive and progressive effects of this invention are as follows:

[0049] This invention establishes a transmission connection between multiple knobs of different diameters. When these knobs rotate synchronously, the larger diameter knob rotates at a smaller angle than the smaller diameter knob, thus enabling the knob assembly to have multiple fine-tuning modes. Specifically, rotating any knob with a diameter smaller than the first knob allows for different degrees of fine-tuning based on the diameter ratio between any knob and the first knob. This improves the accuracy of the knob assembly's rotation angle and, consequently, enables precise control of the gas flow rate. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the knob assembly in Embodiment 1 of the present invention.

[0051] Figure 2 This is a structural schematic diagram of the knob assembly of Embodiment 1 of the present invention from another perspective.

[0052] Figure 3 This is a schematic diagram of the structure of the first knob in Embodiment 1 of the present invention.

[0053] Figure 4 This is a schematic diagram of the structure of the second knob in Embodiment 1 of the present invention.

[0054] Figure 5 This is a schematic diagram of the knob assembly in Embodiment 2 of the present invention.

[0055] Figure 6 This is a schematic diagram of the knob assembly in Embodiment 3 of the present invention.

[0056] Explanation of reference numerals in the attached figures

[0057] Knob assembly 100

[0058] First knob 1

[0059] Reception cavity 12

[0060] 121 high-rise buildings

[0061] Gear tooth layer 122

[0062] 13 clearance slot

[0063] Opening 14

[0064] Second knob 2

[0065] Support rod 21

[0066] baffle 22

[0067] Gear 11

[0068] Third knob 3

[0069] Track 4

[0070] Fourth knob 5

[0071] Synchronous belt 6 Detailed Implementation

[0072] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0073] Example 1

[0074] like Figures 1-4 As shown, this embodiment discloses a knob assembly 100, including a first knob 1, a second knob 2, ... an Nth knob with successively decreasing diameters, where N is a positive integer greater than or equal to 2. The first knob 1 is used to connect to the flow regulating device of the gas valve. The knob assembly 100 has a coarse adjustment mode and N-1 fine adjustment modes. In the coarse adjustment mode, the first knob 1 rotates as the driving wheel. In the first fine adjustment mode, the second knob 2 and the first knob 1 are configured to have a transmission connection and can rotate synchronously, with the second knob 2 acting as the driving wheel to drive the first knob 1 to rotate. In the (N-1)th fine adjustment mode, the Nth knob and the first knob 1 are configured to have a transmission connection and can rotate synchronously, with the Nth knob acting as the driving wheel to drive the first knob 1 to rotate.

[0075] It should be noted that when N equals 2, the knob assembly 100 includes only the first knob 1 and the second knob 2, which does not mean that the knob assembly 100 includes two second knobs 2.

[0076] By establishing a transmission connection between multiple knobs of different diameters, when the knobs of varying diameters rotate synchronously, the rotation angle of the knob with the larger diameter will be less than that of the knob with the smaller diameter. This allows the knob assembly 100 to have both a coarse adjustment mode and multiple fine adjustment modes. Specifically, rotating the first knob 1 with the largest diameter enables coarse adjustment; rotating any knob with a smaller diameter allows for different degrees of fine adjustment based on the diameter ratio of any knob to the first knob 1, thus improving the accuracy of the rotation angle of the knob assembly 100 and enabling precise control of the gas flow. Furthermore, the simultaneous presence of coarse and fine adjustment modes ensures accuracy while further improving operational efficiency. Specifically, coarse adjustment allows the knob assembly 100 to quickly approach the desired rotation angle, followed by fine adjustment to refine the precision.

[0077] The first knob 1, the second knob 2, ... the Nth knob all have a working surface for transmission, and the working surface is provided with a plurality of teeth 11. The first knob 1, the second knob 2, ... the Nth knob are connected by transmission through the teeth 11. The transmission connection achieved through the meshing of the teeth 11 is beneficial to improving the reliability and stability of the transmission, and can also transmit motion between any two axes in space, thereby improving the design flexibility of the knob assembly 100. Of course, the transmission connection is not limited to being achieved through teeth 11; in other embodiments, the transmission connection can be achieved in other ways.

[0078] In this embodiment, the first knob 1, the second knob 2, ... the Nth knob are sequentially meshed with each other via gear teeth 11; when the second knob 2 is rotated, the first knob 1 rotates synchronously with the second knob 2; when the Nth knob is rotated, the first knob 1 rotates synchronously with the Nth knob. Compared to using other auxiliary structures to achieve transmission between knobs, directly meshing the first knob 1, the second knob 2, ... the Nth knob simplifies the transmission relationship, reduces the probability of transmission errors or failures, and thus helps ensure the reliability of the knob assembly 100.

[0079] Preferred, such as Figure 1 As shown, each of the first knobs 1 through N-1 has a cavity 12 for accommodating the second knobs 2 through N. The outer walls of the second knobs 2 through N and the walls of the accommodating cavities 12 are provided with teeth 11. The teeth 11 on the outer walls of the second knobs 2 through N mesh with the teeth 11 on the walls of the accommodating cavities 12 of the first knobs 1 through N-1. In other words, the first knob 1 has a cavity 12 for accommodating the second knob 2, the second knob 2 has a cavity 12 for accommodating the third knob 3, and so on, with the N-1 knob having a cavity 12 for accommodating the Nth knob. This embodiment cleverly utilizes the internal space of a larger diameter knob to accommodate a smaller diameter knob, which improves the structural compactness of the knob assembly 100 and reduces its footprint.

[0080] In other embodiments, a smaller diameter knob can be placed outside a larger diameter knob. That is, a gear tooth 11 is provided on the outer wall surface of the first knob 1 to the Nth knob, so that the outer wall surface of the second knob 2 meshes with the outer wall surface of the first knob 1, the outer wall surface of the third knob 3 meshes with the outer wall surface of the second knob 2, and so on, with the outer wall surface of the Nth knob meshing with the outer wall surface of the (N-1)th knob.

[0081] To prevent instability when rotating the second knob (2...Nth knob), such as... Figure 2 , Figure 4As shown, the knob assembly 100 also includes a support rod 21. The second knob 2...the Nth knob are all rotatably connected to the gas valve via the support rod 21. The support rod 21 provides support for the knobs, preventing them from detaching from the first knob 1. Correspondingly, as... Figure 3 As shown, the bottom surface of the receiving cavity 12 of each of the first knob 1 to the (N-1)th knob is provided with a relief groove 13. The relief groove 13 allows the support rod 21 to pass through. The shape of the relief groove 13 is adapted to the moving path of the support rod 21. In this way, on the one hand, the support rod 21 can pass through the relief groove 13 to connect with the gas valve below, which is convenient for positioning. On the other hand, the relief groove 13 provides the support rod 21 with movement space. When the smaller diameter knob rotates relative to the larger diameter knob, the knob will not be unable to rotate due to the restriction of the support rod 21, which helps to ensure the smooth rotation of the knob. Here, the rotation of the support rod 21 does not directly affect the gas flow rate, but is transmitted to the larger diameter knob through the smaller diameter knob to indirectly change the gas flow rate.

[0082] In this embodiment, the smaller diameter knob rotates around the axis of the larger diameter knob, and the clearance groove 13 is arc-shaped. In other embodiments, the smaller diameter knob can also rotate around its own axis, in which case the clearance groove 13 can be circular, and the size of the circle is adapted to the size of the support rod 21.

[0083] like Figures 1-2 As shown, to prevent liquid from flowing from the gas stove panel into the gas valve through the clearance groove 13, the knob assembly 100 also includes a baffle 22. Baffles 22 are provided between the bottom surfaces of the receiving chambers 12 of the second knob 2 and the first knob 1, and so on, between the bottom surfaces of the receiving chambers 12 of the Nth knob and the (N-1th)th knob. When the support rod 21 moves along the clearance groove 13, the baffle 22 moves synchronously with the support rod 21 and always blocks the clearance groove 13. Specifically, the baffle 22 can be fixedly connected to the knob, so that when the knob is rotated, the baffle 22 can rotate synchronously with the knob. Especially when the clearance groove 13 is arc-shaped, the baffle 22 can always block the clearance groove 13. Specifically, the size of the baffle 22 can be set to be larger than the size of the clearance groove 13 by a certain proportion, so that the baffle 22 can always block the clearance groove 13 when it moves; or the baffle 22 can be set to be retractable along the radial direction of the knob assembly 100, so that the baffle 22 can always block the clearance groove 13 when it moves.

[0084] The side wall of the receiving cavity 12 is provided with an opening 14. The orthographic projection of the moving path of the baffle 22 along the radial direction of the first knob 1 is within the range of the opening 14. That is to say, the extension length of the opening 14 depends on the moving path of the baffle 22. In this way, when the baffle 22 moves together with the knob, the situation where the knob cannot be turned due to the restriction of the baffle 22 by the cavity wall of the receiving cavity 12 can be avoided. Especially when the size of the baffle 22 is set to be large, the opening 14 can ensure that the movement of the baffle 22 is not restricted.

[0085] The opening 14 on the side wall of the receiving cavity 12 can also serve as an overflow outlet. The bottom surface of the receiving cavity 12 gradually slopes away from the opening 14 towards the opening 14, thus allowing the liquid in the receiving cavity 12 to flow naturally along the sloped bottom surface to the opening 14 without requiring the user to drain or clean it, which improves the ease of use and service life of the knob assembly 100. In other embodiments, if multiple openings 14 are provided along the circumference of the knob, the bottom surface of the receiving cavity 12 can gradually slope away from the baffle 22 from the center outwards, so that the liquid can flow to multiple openings 14 respectively.

[0086] The receiving cavity 12 of the first knob 1 to the (N-1)th knob successively includes a frame layer 121 and a gear tooth layer 122. The gear tooth layer 11 is provided with gear teeth 11, and the opening 14 is provided in the frame layer 121. Therefore, the setting of the opening 14 will not affect the setting of the gear teeth 11, and will not affect the smooth meshing between the knobs.

[0087] In this embodiment, each of the first knob 1, the second knob 2, ..., the Nth knob is provided with scale markings, which are arranged circumferentially along the first knob 1, the second knob 2, ..., the Nth knob. By setting scale markings, on the one hand, the angle can be made to correspond with the scale markings, which is beneficial to the convenience of use, and makes it easier for users to adjust the knob to the corresponding scale according to the actual angle needs; on the other hand, since some changes in firepower may not show a significant change in the flame pattern, it is impossible to judge whether the adjustment is in place by the human eye, but the scale markings can clearly show the change in firepower.

[0088] Furthermore, in this embodiment, when in coarse adjustment mode, there is a non-transmission connection between the first knob 1 and the second knob 2, ... between the first knob 1 and the Nth knob. This non-transmission connection means that the knobs do not have a transmission connection. Therefore, the torque of the first knob 1 will not increase when it rotates, and the addition of other knobs will not negatively affect the rotation of the first knob 1. In other embodiments, in coarse adjustment mode, the first knob 1 can always have a transmission connection with other knobs.

[0089] Specifically, the second knob 2 is movable up and down along the axial direction of the first knob 1. Since multiple knobs engage sequentially in this embodiment, in coarse adjustment mode, there is a gap between the teeth 11 of the first knob 1 and the teeth 11 of the second knob 2 along the axial direction of the first knob 1, so that when the first knob 1 rotates, the other knobs will not rotate accordingly. When fine adjustment is needed, the second knob 2 is moved to engage with the first knob 1. Alternatively, the second knob 2 can be set to be movable radially along the first knob 1. In this case, in coarse adjustment mode, there is a gap between the teeth 11 of the first knob 1 and the teeth 11 of the second knob 2 along the radial direction of the first knob 1; when fine adjustment is needed, the second knob 2 is moved to engage with the first knob 1. Of course, there can also be gaps along both the axial and radial directions of the first knob 1.

[0090] In this embodiment, as Figure 2 As shown, in coarse adjustment mode, the gear teeth 11 of the second knob 2 are located at the upper level 121. That is, along the axial direction of the first knob 1, there is a gap between the gear teeth 11 of the first knob 1 and the gear teeth 11 of the second knob 2. When fine adjustment is required, moving the second knob 2 upward will engage it with the first knob 1. The height difference is cleverly utilized to ensure that there is no transmission connection between the first knob 1 and other knobs in coarse adjustment mode. In this embodiment, by setting the upper level 121, a height difference can exist between the first knob 1 and other knobs, and the setting of the opening 14 does not affect the setting of the gear teeth 11. Multiple effects are achieved with a single structure, which helps to simplify the structure of the knob assembly 100 and make the knob assembly 100 more compact.

[0091] The following describes the specific structure and usage of the knob assembly 100, taking an example that includes two knobs (first knob 1 and second knob 2):

[0092] For reference Figures 1-4 To understand, the knob assembly 100 has a coarse adjustment mode and a fine adjustment mode. The first knob 1 has an internal cavity 12 for accommodating the second knob 2. The cavity wall of the cavity 12 has teeth 11, and the outer wall of the second knob 2 also has teeth 11. In coarse adjustment mode, the first knob 1 rotates as the driving wheel. At this time, the teeth 11 of the second knob 2 are on the same horizontal line as the upper layer 121 of the cavity 12, and the second knob 2 does not rotate synchronously with the first knob 1. Moving the second knob 2 upwards moves the teeth 11 of the second knob 2 to the same horizontal line as the tooth layer 122 of the cavity 12, and makes the teeth 11 of the second knob 2 mesh with the teeth 11 of the tooth layer 122. This is the fine adjustment mode. When the second gear rotates as the driving wheel, the first gear rotates synchronously with the second gear, and the rotation angle of the first gear is smaller than that of the second gear, to achieve precise control.

[0093] One end of the support rod 21 is connected to the second knob 2, and the other end is rotatably connected to the flow regulating device. The bottom surface of the receiving cavity 12 of the first knob 1 is provided with a relief groove 13 for the support rod 21 to pass through. The shape of the relief groove 13 is adapted to the movement path of the relief groove 13, and the relief groove 13 is arc-shaped. The bottom of the second knob 2 extends outward to form a baffle 22, which blocks the relief groove 13 to prevent liquid from flowing into the gas valve from the relief groove 13. The side wall of the receiving cavity 12 of the first knob 1 is provided with an opening 14 to avoid restricting the movement of the baffle 22. At the same time, the opening 14 can also serve as an overflow port for liquid to flow out.

[0094] This embodiment also discloses a gas valve, including a flow regulating device. The gas valve further includes a knob assembly 100 as described above, which is connected to the flow regulating device to regulate the gas flow rate. When the flow regulating device of the gas valve is controlled by the knob assembly 100, precise control of the gas flow rate can be achieved, enabling the gas valve to handle a wider range of gas flow rates.

[0095] This embodiment also discloses a gas stove, which includes the gas valve described above. When the gas stove uses the gas valve, it can simultaneously provide a coarse adjustment mode and multiple fine adjustment modes. Coarse adjustment can be achieved by rotating the first knob 1 with the largest diameter; when rotating any knob with a smaller diameter than the first knob 1, different degrees of fine adjustment can be achieved according to the different diameter ratios of any knob to the first knob 1, thus improving the accuracy of the rotation angle of the knob assembly 100 and enabling precise control of the gas flow. In addition, having both coarse and fine adjustment modes ensures accuracy while further improving operational efficiency. Specifically, coarse adjustment allows the knob assembly 100 to quickly approach the required rotation angle, and then fine adjustment adjusts the accuracy.

[0096] Example 2

[0097] Example 2 discloses another possible implementation of the knob assembly 100, namely, the first knob 1, the second knob 2...the Nth knob are connected by a drive belt 4. In this case, the drive belt 4 is the transmission structure. For the specific structure, please refer to... Figure 5 , Figure 5 Taking two knobs as an example, the connection of the first knob 1 and the second knob 2 is shown. The outer wall surfaces of the first knob 1 and the second knob 2 are provided with gear teeth 11. The track 4 is provided with a hinge structure that can cooperate with the gear teeth 11 on the wall surface facing the first knob 1 and the second knob 2. When the second knob 2 is rotated, the first knob 1 can rotate together, and the rotation angle of the first knob 1 is smaller than that of the second knob 2.

[0098] In this embodiment, when in coarse adjustment mode, the first knob 1 and the second knob 2 can also be made without a transmission connection. Specifically, a groove can be made on the gas stove panel so that the track 4 can be movably engaged in the groove. When coarse adjustment is required, the second knob 2 can be moved in the vertical direction or in the horizontal direction so that the second knob 2 and the track 4 do not contact each other. At this time, when the first knob 1 is turned, the other knobs do not rotate synchronously with the first knob 1, and there is no negative impact on the rotation of the first knob 1.

[0099] In this embodiment, each knob can also be rotatably connected to the flow regulating device via the support rod 21.

[0100] Example 3

[0101] Example 3 discloses another possible implementation of the knob assembly 100, namely, the first knob 1, the second knob 2... the Nth knob are connected by a synchronous belt 6. In this case, the synchronous belt 6 is the transmission structure. For the specific structure, please refer to... Figure 6 , Figure 6 Taking a set of four knobs as an example, the connection of the first knob 1, the second knob 2, the third knob 3, and the fourth knob 5 is shown. The first knob 1, the second knob 2, the third knob 3, and the fourth knob 5 are respectively attached to the inner or outer wall of the synchronous belt 6. When the second knob 2, the third knob 3, or the fourth knob 5 is rotated, the first knob 1 can rotate together, and the rotation angle of the first knob 1 is smaller than that of the second knob 2, the third knob 3, and the fourth knob 5.

[0102] In this embodiment, when in coarse adjustment mode, there can be no transmission connection between the first knob 1 and the second knob 2, between the first knob 1 and the third knob 3, and between the first knob 1 and the fourth knob 5. Specifically, a groove can be made on the gas stove panel so that the synchronous belt 6 can be movably engaged in the groove. When coarse adjustment is needed, the second knob 2, the third knob 3, and the fourth knob 5 can be moved vertically or horizontally so that the second knob 2, the third knob 3, and the fourth knob 5 do not contact the synchronous belt 6. At this time, when the first knob 1 is rotated, the other knobs do not rotate synchronously with the first knob 1, and there is no negative impact on the rotation of the first knob 1. In this embodiment, each knob can also be rotatably connected to the flow regulating device via the support rod 21.

[0103] It should be noted that the specific structure of the knob assembly 100 is not limited to the structures disclosed in Embodiments 1, 2 and 3, and can also be other structures that can realize the transmission connection between knobs of different diameters.

[0104] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A knob assembly, characterized by It includes a first knob, a second knob, ... an Nth knob with successively decreasing diameters, where N is a positive integer greater than 2. The first knob is used to connect to the flow regulating device. The knob assembly has N-1 fine-tuning modes; When in the first fine-tuning mode, the second knob and the first knob are configured to have a transmission connection and be able to rotate synchronously, with the second knob acting as the drive wheel to drive the first knob to rotate. When in the N-1 fine-tuning mode, the Nth knob and the first knob are configured to have a transmission connection and be able to rotate synchronously. The Nth knob acts as the driving wheel to drive the first knob to rotate. The first knob, the second knob, ... the Nth knob all have a working surface for cooperating transmission. The working surface is provided with a plurality of gear teeth. The first knob, the second knob, ... the Nth knob are connected to each other through the gear teeth. The first knob, the second knob, ... the Nth knob mesh with each other sequentially via the gear teeth; When the second knob is turned, the first knob rotates synchronously with the second knob; When the Nth knob is turned, the first knob rotates synchronously with the Nth knob; The first knob...the (N-1)th knob each have a receiving cavity for accommodating the second knob...the Nth knob. The outer wall surface of the second knob...the Nth knob and the cavity wall of the receiving cavity are both provided with the gear teeth. The gear teeth on the outer wall surface of the second knob...the Nth knob respectively mesh with the gear teeth on the cavity wall of the receiving cavity of the first knob...the (N-1)th knob. The knob assembly also includes a support rod. The second knob...the Nth knob are all rotatably connected to the flow regulating device via the support rod. The bottom surface of the receiving cavity of the first knob...the (N-1)th knob is provided with a relief groove, through which the support rod passes. The shape of the relief groove is adapted to the moving path of the support rod.

2. The knob assembly of claim 1, wherein, The knob assembly further includes a baffle, and the baffle is provided between the bottom surface of the receiving cavity of the second knob and the first knob... and between the bottom surface of the receiving cavity of the Nth knob and the (N-1)th knob, and the baffle is fixedly connected to the second knob... and the Nth knob; As the support rod moves along the clearance groove, the baffle moves synchronously with the support rod and always blocks the clearance groove.

3. The knob assembly of claim 2, wherein The side wall of the receiving cavity is provided with an opening, and the moving path of the baffle is projected radially onto the first knob within the range of the opening.

4. The knob assembly of claim 3, wherein The bottom surface of the receiving cavity gradually slopes away from the baffle from the side away from the opening towards the opening; Alternatively, the bottom surface of the receiving cavity gradually slopes away from the baffle from the center outwards.

5. The knob assembly of claim 1, wherein, The first knob, the second knob, ... the Nth knob are all provided with scale markings, which are respectively arranged along the circumference of the first knob, the second knob, ... the Nth knob.

6. The knob assembly of any one of claims 1-5, wherein, The knob assembly also has a coarse adjustment mode, in which the first knob rotates as the drive wheel when in coarse adjustment mode; The second knob...the Nth knob is configured to be movable relative to the first knob. When in coarse adjustment mode, the first knob and the second knob...the first knob and the Nth knob all have a non-transmission connection relationship.

7. The knob assembly as claimed in claim 6, characterized in that, Along the axial direction of the first knob, there is at least a gap between the teeth of the first knob and the teeth of the second knob, and / or, along the radial direction of the first knob, there is at least a gap between the teeth of the first knob and the teeth of the second knob.

8. The knob assembly as claimed in claim 7, characterized in that, The first knob...the (N-1)th knob has internal receiving cavities for accommodating the second knob...the Nth knob; From the bottom of the receiving cavity toward the direction away from the bottom surface, at least the receiving cavity of the first knob sequentially includes a frame layer and a gear tooth layer, the gear tooth layer being provided with the gear teeth, and when in coarse adjustment mode, the gear teeth of the second knob are located in the frame layer.

9. A gas valve, comprising a flow regulating device, characterized in that, The gas valve further includes a knob assembly as described in any one of claims 1-8, the knob assembly being connected to the flow regulating device to regulate the gas flow rate.

10. A gas stove, characterized in that, The gas stove includes the gas valve as described in claim 9.

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