Knob and stove

Abstract

The utility model discloses a knob, which is applied to a kitchen range and comprises a knob shell, a knob cover, a plurality of fixed ribs and a plurality of fixed ribs, the knob shell comprises a knob ring and an opening for sealing one end of the knob ring, and the inner wall of the knob ring is provided with a plurality of fixed ribs which are parallel to the central axis of the knob shell and are arranged at intervals along the circumferential direction; and the knob inner core is located in the knob shell, and a plurality of fixing grooves which correspond to the fixing ribs and are clamped and matched with the fixing ribs are formed in the peripheral surface of the knob inner core. The utility model further discloses a kitchen range with the knob. The beneficial effects of the utility model lie in that the fixation of the knob housing and the knob inner core is firm and stable.

Description

Technical Field

[0001] This utility model relates to a knob and a stove, belonging to the technical field of kitchen appliances. Background Technology

[0002] In existing stoves, most knobs consist of a metal outer shell and a plastic inner core. The outer shell is cap-shaped and fixedly fitted over the inner core. Users manually rotate the outer shell to rotate the inner core, thereby controlling the stove's ignition, flameout, and flame intensity.

[0003] Currently, in existing technologies, the knob housing and the knob core are usually fixed together by adhesive. Although this fixing method simplifies the manufacturing and assembly process to some extent, it has the following drawbacks: after prolonged use, the adhesive may fail and lose its bonding effect, resulting in the user's inability to rotate the knob cover and the knob housing falling off the knob core. Utility Model Content

[0004] The purpose of this utility model is to provide a knob and a stove that make the knob shell and the knob core firmly and stably fixed.

[0005] This utility model is achieved through the following technical solution.

[0006] A knob, used in a stove, comprising:

[0007] The knob housing includes a knob ring and a knob cover that closes the opening at one end of the knob ring. The inner wall of the knob ring has a plurality of fixing ribs that are parallel to the central axis of the knob housing and are spaced apart in the circumferential direction.

[0008] The inner core of the knob is located inside the outer shell of the knob, and the outer circumferential surface of the inner core of the knob has a plurality of fixing grooves corresponding to the fixing ribs and engaging with them.

[0009] As a further improvement of this utility model, the width of the fixing groove gradually decreases from its opening to its bottom.

[0010] As a further improvement of this utility model, the fixing groove and the fixing rib are interference-fitted.

[0011] As a further improvement of this utility model, the inner wall of the knob ring has at least a portion of an annular gap between the axial direction of the knob housing and the outer peripheral surface of the knob core, and the annular gap forms an outer peripheral thermal buffer cavity.

[0012] As a further improvement of this utility model, the inner wall of the knob ring is formed with a stepped structure along its circumference, and the stepped structure divides the inner wall of the knob ring into a fitting surface that is close to the knob cover and fits against the outer peripheral surface of the knob core, and a gap surface that is away from the knob cover and has a gap with the outer peripheral surface of the knob core.

[0013] As a further improvement of this utility model, the bonding surface and the outer peripheral surface of the knob inner core are bonded together.

[0014] As a further improvement of this utility model, the inner core of the knob has multiple cavities to form an internal heat dissipation cavity.

[0015] As a further improvement of this utility model, the inner core of the knob includes a core column and an outer ring body surrounding the core column and spaced apart from it. Multiple reinforcing ribs are connected circumferentially between the core column and the outer ring body, and the space between the core column and the outer ring body is divided into multiple internal heat dissipation cavities by the reinforcing ribs.

[0016] As a further improvement of this utility model, the end face of the core column facing the knob cover is bonded to the inner wall of the knob cover.

[0017] A cooktop, including the knob.

[0018] The beneficial effects of this utility model are:

[0019] By using a combination of fixing ribs and fixing grooves to replace traditional glue bonding, the knob shell and knob core are firmly and stably fixed. First, it achieves the functions of mechanical interlocking, axial limiting, and circumferential torque transmission, effectively avoiding connection failure caused by glue aging. The mechanical interlocking method completely eliminates the risk of glue aging at high temperatures, making it especially suitable for the long-term hot environment of stoves. The structure of fixing ribs and fixing grooves simplifies the assembly process, eliminating the need for glue curing time and improving production efficiency.

[0020] The internal heat dissipation cavity of the knob core, together with the outer heat buffer cavity, forms a layered heat insulation system. The outer heat buffer cavity uses an air layer to block the direct conduction of external high temperature, while the internal heat dissipation cavity extends the path of heat transfer to the core through the cavity structure, and further weakens the penetration intensity of residual heat flow by taking advantage of the low thermal conductivity of air. The two work together to form a double thermal protection. Attached Figure Description

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0022] Figure 1 This is a schematic diagram of the knob in its split configuration;

[0023] Figure 2 This is a cross-sectional view of the knob;

[0024] Figure 3 This is a schematic diagram of the knob's outer casing;

[0025] Figure 4 This is a schematic diagram of the inner core of the knob. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0028] Implementation Case 1:

[0029] A knob, used in stoves, see reference. Figures 1-4 The appliance comprises a knob housing 1 and a knob core 2. The knob housing 1 is made of metal, and the knob core 2 is made of plastic. The knob housing 1 has a cap-like structure, including a knob ring 11 and a knob cover 12 that closes one end of the knob ring 11. These two components can be integrated or separate. The knob core 2 is located inside and connected to the knob housing 1. When the user rotates the knob housing 1, the knob core 2 rotates synchronously, thus controlling the ignition, extinguishing, and adjusting the flame intensity of the stove.

[0030] In this embodiment, the inner wall of the knob ring 11 has multiple fixing ribs 31. The fixing ribs 31 are strip-shaped and are parallel to the central axis of the knob housing 1 and are arranged at intervals along the circumference of the inner wall of the knob ring 11. The outer peripheral surface 2a of the knob inner core 2 has multiple fixing grooves 32. The fixing grooves 32 and the fixing ribs 31 are arranged correspondingly and are engaged with each other.

[0031] This implementation uses a locking mechanism between the fixing ribs 31 and the fixing grooves 32, replacing the traditional glue bonding method. This ensures a firm and stable fixation between the knob shell 1 and the knob core 2, significantly improving the reliability and lifespan of the stove knob. Specifically, the fixing ribs 31 on the inner wall of the knob ring 11 are parallel to the central axis of the knob shell 1 and lock into the fixing grooves 32 on the outer circumferential surface 2a of the knob core. This firstly achieves mechanical interlocking, axial limiting, and circumferential torque transmission, effectively avoiding connection failure caused by glue aging. The mechanical interlocking method completely eliminates the risk of glue aging at high temperatures, making it particularly suitable for the long-term hot environment of the stove and ensuring a firm connection. Secondly, the locking structure between the fixing ribs 31 and the fixing grooves 32 simplifies the assembly process, eliminating the need for glue curing time and improving production efficiency. Furthermore, the circumferentially distributed fixing ribs 31 and fixing grooves 32 ensure uniform stress distribution, enhancing structural strength while maintaining the feel of rotation operation.

[0032] In this embodiment, the width of the fixing groove 32 gradually decreases from its opening to its bottom. More specifically, the two walls of the fixing groove 32 have opposite inclination directions and the same inclination magnitude relative to the depth direction of the fixing groove 32, thus giving the fixing groove 32 a wedge-shaped structure with a wide opening and a narrow bottom. The gradual narrowing of the fixing groove 32 from its opening to its bottom allows the fixing rib 31 to easily slide into the groove when the knob core 2 is inserted into the knob housing 1, even with slight positional deviations. Preliminary positioning can be achieved without precise alignment, making the assembly operation of inserting the knob core 2 into the knob housing 1 more convenient.

[0033] In this embodiment, the fixing groove 32 and the fixing rib 31 are interference-fitted. During assembly, the fixing rib 31 is pressed into the fixing groove 32 with a dimension slightly larger than the width of the fixing groove 32, forcing the fixing groove 32 to undergo slight elastic expansion, forming a continuous radial compressive force. On the one hand, the elastic deformation of the material achieves a "self-locking" effect, eliminating the risk of loosening that may exist in traditional clearance fits, especially adapting to the thermal expansion and contraction changes in the high-temperature environment of the stove; on the other hand, the surface friction brought by the interference fit significantly improves the torsional resistance, ensuring that the knob housing 1 and the knob inner core 2 move synchronously when the user rotates the knob, avoiding slippage and failure.

[0034] In this embodiment, at least a portion of the inner wall of the knob ring 11 along the axial direction of the knob housing 1 and the outer peripheral surface 2a of the knob inner core 2 have an annular gap, which forms an outer peripheral heat buffer cavity r1. By setting an annular gap between the inner core and the knob ring 11 to form an outer peripheral heat buffer cavity r1, the direct thermal shock of the high-temperature environment of the stove to the knob structure is effectively mitigated. Specifically, the outer peripheral heat buffer cavity r1, through the low thermal conductivity of the air layer, blocks the heat transfer from the flame or high-temperature airflow to the knob inner core 2, effectively reducing the temperature of the knob inner core 2 area compared to the previous version, thereby avoiding the jamming or deformation problems caused by the thermal expansion difference of metal materials in the traditional one-piece structure. At the same time, the micro-airflow formed inside the outer peripheral heat buffer cavity r1 can generate a passive heat dissipation effect when the knob is rotated, further reducing the risk of heat accumulation.

[0035] In this embodiment, the inner wall of the knob ring 11 has a stepped structure 111 along its circumference. The stepped structure 111 is closer to the knob cover 12 than the opening of the knob housing 1. The stepped structure 111 divides the inner wall of the knob ring 11 into two parts: one part is a mating surface 11a that is close to the knob cover 12 and fits against the outer peripheral surface 2a of the knob inner core 2; the other part is a spacer surface 11b that is far from the knob cover 12 and has a gap with the outer peripheral surface 2a of the knob inner core 2. The gap between the spacer surface 11b and the outer peripheral surface 2a of the knob inner core 2 forms the outer peripheral heat buffer cavity r1. Because the stepped structure 111 is closer to the knob cover 12, the area of ​​the spacer surface 11b is larger than that of the mating surface 11a. This embodiment provides a mechanical interlock between the knob inner core 2 and the knob outer shell 1 through the snap-fit ​​engagement of the fixing rib 31 and the fixing groove 32, ensuring an effective and secure connection. The solid contact between the mating surface 11a and the outer peripheral surface 2a of the knob inner core 2 has several advantages. First, under high-temperature conditions, the mating surface 11a can compensate for the slight gaps that may be caused by thermal expansion in the snap-fit ​​engagement of the fixing rib 31 and the fixing groove 32, maintaining the overall structural rigidity. Second, it can effectively reduce the operational looseness caused by the relative micro-movement of the knob outer shell 1 and the knob inner core 2, making the force transmission of the snap-fit ​​more stable and reliable.

[0036] In this embodiment, the mating surface 11a and the outer peripheral surface 2a of the knob inner core 2 are bonded together, specifically using adhesive materials such as glue. The snap-fit ​​between the fixing rib 31 and the fixing groove 32 remains the main force transmission path, ensuring reliable torque transmission; the partial bonding between the mating surface 11a and the outer peripheral surface 2a of the knob inner core 2 eliminates microscopic gaps in the contact surfaces, suppresses minor displacements caused by material expansion differences at high temperatures, and makes the rotation operation more precise and tight.

[0037] In this embodiment, the knob core 2 has multiple cavities inside, which form an internal heat dissipation cavity r2. The internal heat dissipation cavity r2 of the knob core 2, together with the outer peripheral heat buffer cavity r1, constitutes a layered heat insulation system. The outer peripheral heat buffer cavity r1 uses an air layer to block the direct conduction of external high temperature, while the internal heat dissipation cavity r2 extends the path of heat transfer to the core through the cavity structure, and further weakens the penetration intensity of residual heat flow by taking advantage of the low thermal conductivity of air. The two work together to form a dual thermal protection.

[0038] In this embodiment, the inner core 2 of the knob further includes a core pillar 21 and an outer ring 22. The outer ring 22 surrounds the core pillar 21 and is spaced apart from it. The outer surface of the outer ring 22 is the outer peripheral surface 2a of the inner core 2 of the knob. Multiple reinforcing ribs 23 are connected between the core pillar 21 and the outer ring 22 in the circumferential direction. Generally, the connecting ribs are evenly distributed in the circumferential direction. The space between the core pillar 21 and the outer ring 22 is divided into multiple internal heat dissipation cavities r2 by the reinforcing ribs 23. Multiple independent internal heat dissipation cavities r2 are separated by reinforcing ribs 23, achieving dual optimization of structure and thermal management. On the one hand, the reinforcing ribs 23 form a circumferential support system between the core column 21 and the outer ring 22, which can significantly improve the torsional stiffness of the inner core, prevent structural deformation under rotational stress, and ensure the fitting accuracy of the fixing ribs 31 and fixing grooves 32. On the other hand, the separated independent cavities disperse and store heat, extend the heat conduction path, and form gradient insulation with the outer heat buffer cavity, reducing the penetration efficiency of high temperature into the core area. At the same time, the reinforcing ribs 23 themselves act as a local heat conduction blocking layer, enhancing the internal heat dissipation effect of the knob core 2 by increasing the heat dissipation surface area.

[0039] In this embodiment, the end face 2b of the core 21 facing the knob cover 12 is bonded to the inner wall of the knob cover 12, which is the same as the bonding surface 11a is bonded to the outer peripheral surface 2a of the inner core 2 of the knob. Specifically, adhesive materials such as glue can be used for bonding. The bonding surface 11a serves the same purpose as the outer peripheral surface 2a of the inner core 2 of the knob, further enhancing the technical effect of the bonding based on the snap-fit ​​cooperation of the fixing rib 31 and the fixing groove 32.

[0040] Implementation Case 2:

[0041] A cooktop includes a knob, as shown in Embodiment 1.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A knob, characterized in that, Applied to cooktops, including: The knob housing (1) includes a knob ring (11) and a knob cover (12) that closes the opening at one end of the knob ring (11). The inner wall of the knob ring (11) has a plurality of fixing ribs (31) that are parallel to the central axis of the knob housing (1) and are arranged circumferentially. The knob core (2) is located inside the knob shell (1). The outer peripheral surface (2a) of the knob core (2) has multiple fixing grooves (32) corresponding to the fixing ribs (31) and engaging with them.

2. The knob according to claim 1, characterized in that, The width of the fixed groove (32) gradually decreases from its opening to its bottom.

3. The knob according to claim 1 or 2, characterized in that, The fixing groove (32) and the fixing rib (31) are interference fit.

4. The knob according to claim 1, characterized in that, The inner wall of the knob ring (11) has at least a portion of an annular gap between the inner wall of the knob housing (1) and the outer peripheral surface (2a) of the knob core (2), and the annular gap forms an outer peripheral thermal buffer cavity (r1).

5. The knob according to claim 4, characterized in that, The inner wall of the knob ring (11) is formed with a stepped structure (111) along its circumference. The stepped structure (111) divides the inner wall of the knob ring (11) into a mating surface (11a) that is close to the knob cover (12) and fits against the outer peripheral surface (2a) of the knob core (2), and a gap surface (11b) that is far from the knob cover (12) and has a gap with the outer peripheral surface (2a) of the knob core (2).

6. The knob according to claim 5, characterized in that, The bonding surface (11a) and the outer peripheral surface (2a) of the knob inner core (2) are bonded together.

7. The knob according to claim 1, characterized in that, The inner core (2) of the knob has multiple cavities to form an internal heat dissipation cavity (r2).

8. The knob according to claim 7, characterized in that, The knob core (2) includes a core column (21) and an outer ring (22) surrounding the core column (21) and spaced apart from it. Multiple reinforcing ribs (23) are connected circumferentially between the core column (21) and the outer ring (22), and the space between the core column (21) and the outer ring (22) is divided by the reinforcing ribs (23) into multiple internal heat dissipation cavities (r2).

9. The knob according to claim 8, characterized in that, The end face (2b) of the core column (21) facing the knob cover (12) is bonded to the inner wall of the knob cover (12).

10. A stove, characterized in that, Includes the knob as described in any one of claims 1-9.

Images