Knob structure for a food processor

Abstract

The utility model discloses a kind of knob structure for food processing machine, it is related to food processing equipment technical field, the structure includes body, knob module and circuit board, knob module is constituted by fixed bolster and rotating module;Fixed bolster is fixedly connected with body, its side towards rotating module is provided with containing cavity, and there are several limit buckles in containing cavity along rotating module rotating direction circumferential array;Rotating module is at least partially inserted in containing cavity and is provided with connecting convex ring, limit buckle is matched with the joint of connecting convex ring;Rotating module can rotate relative to fixed bolster, and with the adjusting shaft of circuit board insert joint cooperation.This structure is matched by the joint of limit buckle and connecting convex ring, without accurate control tight fit gap, both simplify assembly process, improve production efficiency, also avoid knob loose and fall off, guarantee use stability and security, applicable to various food processing machines.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a knob structure for a food processing machine. Background Technology

[0002] In the food processing machine industry, the knob, as a core component of human-machine interaction, directly affects the operational reliability and user experience of the equipment due to the stability of its assembly structure. Currently, the mainstream assembly method for food processing machine knobs in the industry generally adopts a direct plug-in connection structure between the knob and the circuit board. Specifically, a plug hole is pre-set on the inside of the knob to match the adjustment shaft on the circuit board. Through the tight fit between the adjustment shaft and the plug hole, the knob is fixed on the adjustment shaft, thereby enabling the user to adjust the working mode (such as stirring, juicing, grinding, etc.) or parameters (such as speed, time, etc.) of the food processing machine when turning the knob.

[0003] While this type of tight-fitting assembly structure boasts advantages such as simple design principles and low initial manufacturing costs, leading to its application in miniaturized, low-frequency food processing machines, its structural defects have gradually become apparent during actual production and use. The core issue lies in the difficulty of precisely controlling the tightness of the fit between the adjusting shaft and the insertion hole, specifically manifested in the following two aspects:

[0004] On the one hand, if the fit clearance is designed to be too tight to avoid the knob from becoming loose or falling off during use, it will require operators to apply a large amount of external force to insert the adjustment shaft into the insertion hole during the production and assembly stage. This not only significantly increases the difficulty of the assembly process and reduces production efficiency, but may also cause structural damage to the adjustment shaft or insertion hole due to excessive external force (such as deformation of the adjustment shaft or wear of the inner wall of the insertion hole), which may lead to secondary problems such as knob jamming and reduced adjustment accuracy, thus affecting the product's factory qualification rate.

[0005] On the other hand, if the fitting clearance is appropriately widened in order to reduce assembly difficulty and improve production efficiency, the adjusting shaft can be easily inserted into the insertion hole. However, during the daily use of the food processing machine, as the user repeatedly turns the knob or the slight vibration generated during the operation of the equipment, the knob and the adjusting shaft are prone to loosening. In severe cases, the knob may even be pulled off the adjusting shaft. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a knob structure for a food processing machine.

[0007] A knob structure for a food processing machine designed for this purpose includes a body, a knob module, and a circuit board. The knob module includes a fixed bracket and a rotating module. The fixed bracket is fixedly connected to the body. The rotating module is rotatably disposed relative to the fixed bracket and is plugged into the adjustment shaft of the circuit board.

[0008] The fixed bracket has a receiving cavity on the side facing the rotating module; the rotating module is at least partially inserted into the receiving cavity; a plurality of limiting buckles are arranged in a circumferential array in the receiving cavity along the rotation direction of the rotating module; the rotating module is provided with a connecting protrusion; the limiting buckles are engaged with the connecting protrusion.

[0009] Preferably, the rotating module includes a rotating knob and a knob support that are connected to each other, and the connecting protrusion is disposed on the knob support;

[0010] The rotary knob is provided with a mating shaft, and the mating shaft is provided with a mating hole that is mated with the adjustment shaft.

[0011] The adjusting shaft is provided with a limiting step, and the end face of the mating shaft facing the circuit board abuts against the limiting step for limitation.

[0012] Preferably, the circuit board is fixedly disposed inside the body; the body is provided with a mating interface at the position corresponding to the adjustment shaft, and a plurality of card interfaces are provided on the body around the mating interface; the fixed bracket is provided with connecting buckles of the card interfaces; the connecting buckles are engaged with the card interfaces.

[0013] The fixed bracket is provided with a shaft hole, and the adjusting shaft extends through the shaft hole into the receiving cavity.

[0014] Preferably, the knob bracket is provided with a positioning ring extending toward the rotating knob, and the positioning ring is provided with a positioning groove; the mating shaft is movably inserted into the positioning ring, and the rotating knob is provided with a positioning protrusion that engages with the positioning groove.

[0015] Preferably, the knob bracket is provided with a plurality of threaded posts, and the rotating knob is provided with mounting holes corresponding to the threaded posts, and screws that are threadedly connected to the threaded posts are inserted through the mounting holes.

[0016] Preferably, a decorative cover is provided on the side of the rotating knob facing away from the knob support.

[0017] Preferably, the cavity is provided with a first limiting engagement part, and the rotating module is connected to a second limiting engagement part that abuts against and limits the first limiting engagement part.

[0018] Compared with the prior art, the specific beneficial effects of this utility model are as follows:

[0019] Firstly, it significantly improves the convenience and efficiency of production and assembly. Compared to existing tight-fitting structures that require precise control of tightness, this solution achieves a snap-fit ​​connection between the rotating module and the fixed bracket through limit buckles and connecting protrusions. During assembly, simply insert the rotating module into the receiving cavity of the fixed bracket, and the automatic engagement of the limit buckles and connecting protrusions completes the fixation. This eliminates the need for applying significant external force or repeatedly adjusting the fit clearance, significantly reducing the difficulty of assembly operations and the time spent on assembly processes. It also avoids damage to the adjusting shaft or insertion hole due to excessive external force, effectively improving the product's factory qualification rate.

[0020] Secondly, it significantly enhances structural stability during use. Existing tight-fitting structures are prone to loosening or detachment due to repeated rotation or equipment vibration. However, the circumferential array of limiting buckles in this solution can stably limit the connecting protrusions of the rotating module from multiple directions. Even when the user rotates the knob frequently or when the food processor vibrates during operation, the limiting buckles can firmly engage the connecting protrusions, effectively preventing relative loosening between the rotating module and the fixed bracket. This ensures that the knob can always stably drive the adjustment shaft of the circuit board to adjust parameters, avoiding equipment interruption due to loosening or detachment of the knob, and improving the reliability of equipment use. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is one of the exploded structural diagrams of this utility model;

[0023] Figure 3 This is the second exploded structural diagram of the present invention;

[0024] Figure 4 This is the third exploded structural diagram of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the rotating module;

[0026] Figure 6 This is one of the exploded structural diagrams of the rotating module;

[0027] Figure 7 This is the second exploded structural diagram of the rotating module. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] See Figures 1-7A knob structure for a food processing machine includes a body 10, a knob module 20, and a circuit board 30. The knob module 20 includes a fixed bracket 210 and a rotating module 220. The fixed bracket 210 is fixedly connected to the body 10. The rotating module 220 is rotatably disposed relative to the fixed bracket 210 and is inserted into the adjustment shaft 310 of the circuit board 30. The fixed bracket 210 has a receiving cavity 211 on the side facing the rotating module 220. The rotating module 220 is at least partially inserted into the receiving cavity 211. A plurality of limiting buckles 212 are arranged in a circumferential array in the receiving cavity 211 along the rotation direction of the rotating module 220. The rotating module 220 is provided with a connecting protrusion 241. The limiting buckles 212 are engaged with the connecting protrusion 241.

[0030] The adjustment shaft 310 is the shaft of the adjustment switch 300 integrated on the circuit board 310.

[0031] The installation principle of this utility model is as follows:

[0032] First, align the mounting bracket in the knob module with the preset installation position on the machine body, and use conventional fixing methods such as screw locking, snap-fit, or welding to make the mounting bracket firmly connected to the machine body. Before this, the circuit board has been fixedly installed in the machine body according to the preset assembly position, and the adjustment shaft on the circuit board faces the receiving cavity of the mounting bracket, providing a precise reference for the subsequent assembly and functional docking of the rotating module. At this time, the receiving cavity of the mounting bracket facing the rotating module is in the assembly state.

[0033] Secondly, align the side of the rotating module with the connecting protrusion with the receiving cavity of the fixed bracket, while ensuring that the preset insertion hole on the rotating module is aligned with the adjustment shaft of the pre-installed circuit board inside the machine. Then, push the rotating module into the receiving cavity along the common axial direction of the receiving cavity and the adjustment shaft. During the pushing process, on the one hand, the connecting protrusion of the rotating module will contact the limiting buckles of the circumferential array inside the receiving cavity. As the pushing force increases, the limiting buckles will deform slightly due to their own elasticity, providing space for the connecting protrusion to pass through, until the rotating module is pushed to the preset position and the connecting protrusion is fully engaged in the locking area of ​​the limiting buckles. The limiting buckles will then return to their original deformation, limiting the connecting protrusion from the circumferential direction, preventing the rotating module from detaching from the fixed bracket along the axial direction and allowing it to rotate freely around the central axis, thus completing the snap-fit ​​assembly of the rotating module and the fixed bracket. On the other hand, at the same time as the rotating module is pushed in, the adjustment shaft of the pre-installed circuit board inside the machine will be simultaneously inserted into the insertion hole of the rotating module, forming a stable insertion fit, realizing the linkage structure of the rotating module and the adjustment shaft.

[0034] At this point, the entire installation process of the knob structure is complete. The user can then rotate the rotating module, which, through the connection of the insertion hole and the adjustment shaft, drives the adjustment shaft to rotate synchronously. This allows for precise adjustment of the food processor's operating mode or parameters, eliminating the need for a separate docking process between the rotating module and the adjustment shaft, significantly simplifying the assembly process.

[0035] See Figures 4 to 7 The rotating module 220 includes a rotating knob 230 and a knob support 240 connected to each other. The connecting protrusion ring 241 is disposed on the knob support 240. The rotating knob 230 is provided with a mating shaft 231, and the mating shaft 231 is provided with a mating hole 232 that is mated with the adjusting shaft 310. The adjusting shaft 310 is provided with a limiting step 311, and the end face of the mating shaft 231 facing the circuit board 30 abuts against the limiting step 311 for limitation. The rotating module is divided into a rotating knob and a knob bracket, with corresponding structures to precisely adapt to assembly and functional requirements: the connecting protrusion ring on the knob bracket can stably engage with the limiting buckle of the fixed bracket cavity, providing a reliable installation foundation for the entire rotating module without affecting rotational flexibility; the mating shaft and insertion hole of the rotating knob can precisely connect with the adjustment shaft of the circuit board, ensuring that the rotation of the knob can drive the adjustment shaft synchronously, realizing the parameter adjustment function of the food processing machine; the limiting step of the adjustment shaft abuts against the end face of the mating shaft, which can limit the rotating module axially, preventing the mating from loosening due to axial movement of the rotating module during long-term use, further improving structural stability.

[0036] See Figure 2 and Figure 3 The circuit board 30 is fixedly disposed inside the body 10. The body 10 has a mating interface 110 at a position corresponding to the adjusting shaft 310. Several locking interfaces 120 are provided around the mating interface 110 on the body 10. The fixing bracket 210 is provided with connecting buckles 214 for the locking interfaces 120. The connecting buckles 214 engage with the locking interfaces 120. The fixing bracket 210 has a shaft hole 215 through which the adjusting shaft 310 extends into the receiving cavity 211. The circuit board is fixed inside the body, providing a stable mounting base for the adjusting shaft and ensuring its precise functional positioning. The mating interface of the body provides a channel for the extension of the adjusting shaft, and the locking interfaces around the body engage with the connecting buckles of the fixing bracket, enabling quick and stable assembly of the fixing bracket and the body without the need for additional fasteners. The shaft hole of the fixing bracket allows the adjusting shaft to pass through and extend into the receiving cavity, ensuring precise docking of the adjusting shaft with the rotating module and laying the foundation for subsequent rotational linkage.

[0037] See Figure 6 and Figure 7The knob bracket 240 is provided with a positioning ring 243 extending toward the rotating knob 230, and the positioning ring 243 is provided with a positioning groove 244. The mating shaft 231 is movably inserted into the positioning ring 243, and the rotating knob 230 is provided with a positioning protrusion 233 that engages with the positioning groove 244. The positioning ring 243 has a through space inside, which allows the mating shaft 231 to engage with the adjusting shaft 310. The positioning ring of the knob bracket provides a movable insertion space for the mating shaft of the rotating knob, and its through space allows the mating shaft and the adjusting shaft to be smoothly mated. On the other hand, the positioning groove of the positioning ring engages with the positioning protrusion of the rotating knob to prevent the two from misaligning during assembly, restrict relative rotation, and ensure that the rotating knob can drive the knob bracket synchronously when rotating, thus ensuring transmission stability and assembly firmness.

[0038] See Figure 6 and Figure 7 The knob bracket 240 is provided with a plurality of threaded posts 245, and the rotating knob 230 is provided with mounting holes 234 corresponding to the threaded posts 245. The mounting holes 234 are provided with screws 260 that are threadedly connected to the threaded posts 245.

[0039] See Figure 6 and Figure 7 A decorative cover 250 is provided on the side of the rotating knob 230 facing away from the knob support 240.

[0040] See Figure 6 and Figure 7 The receiving cavity 211 is provided with a first limiting engagement part 213, and the rotating module 220 is connected to a second limiting engagement part 242 that abuts against and limits the first limiting engagement part 213. The abutting engagement of the two parts constrains the rotation angle of the rotating module, preventing excessive rotation from causing failure of the insertion engagement with the circuit board adjustment shaft, or exceeding the functional adjustment range of the food processor. This ensures that the rotating module always rotates stably within a preset angle, further improving the reliability and functional accuracy of the knob structure.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A knob structure for a food processing machine, comprising a body (10), a knob module (20), and a circuit board (30), characterized in that: The knob module (20) includes a fixed bracket (210) and a rotating module (220); the fixed bracket (210) is fixedly connected to the body (10); the rotating module (220) is rotatably arranged relative to the fixed bracket (210) and is plugged into the adjustment shaft (310) of the circuit board (30); The fixed bracket (210) is provided with a receiving cavity (211) on the side facing the rotating module (220); the rotating module (220) is at least partially inserted into the receiving cavity (211); a plurality of limiting buckles (212) are arranged in a circumferential array in the receiving cavity (211) along the rotation direction of the rotating module (220); the rotating module (220) is provided with a connecting protrusion (241); the limiting buckles (212) are engaged with the connecting protrusion (241).

2. The knob structure for a food processing machine according to claim 1, characterized in that: The rotating module (220) includes a rotating knob (230) and a knob bracket (240) connected to each other, and the connecting protrusion (241) is disposed on the knob bracket (240); The rotary knob (230) is provided with a mating shaft (231), and the mating shaft (231) is provided with a mating hole (232) that is mated with the adjusting shaft (310); The adjusting shaft (310) is provided with a limiting step (311), and the end face of the mating shaft (231) facing the circuit board (30) abuts against the limiting step (311) for a limiting position.

3. The knob structure for a food processing machine according to claim 1, characterized in that: The circuit board (30) is fixedly disposed inside the body (10); the body (10) is provided with a docking interface (110) at the position corresponding to the adjustment shaft (310), and a plurality of card interfaces (120) are provided on the body (10) around the docking interface (110); the fixed bracket (210) is provided with a connecting buckle (214) for the card interface (120); the connecting buckle (214) engages with the card interface (120); The fixed bracket (210) is provided with a shaft hole (215), and the adjusting shaft (310) extends through the shaft hole (215) into the receiving cavity (211).

4. The knob structure for a food processing machine according to claim 2, characterized in that: The knob bracket (240) is provided with a positioning ring (243) extending toward the rotating knob (230), and the positioning ring (243) is provided with a positioning groove (244); the mating shaft (231) is movably inserted into the positioning ring (243), and the rotating knob (230) is provided with a positioning protrusion (233) that engages with the positioning groove (244).

5. A knob structure for a food processing machine according to claim 2, characterized in that: The knob bracket (240) is provided with a plurality of threaded posts (245), and the rotating knob (230) is provided with mounting holes (234) corresponding to the threaded posts (245). The mounting holes (234) are provided with screws (260) that are threadedly connected to the threaded posts (245).

6. A knob structure for a food processing machine according to claim 5, characterized in that: A decorative cover (250) is provided on the side of the rotary knob (230) facing away from the knob bracket (240).

7. The knob structure for a food processing machine according to claim 1, characterized in that: The cavity (211) is provided with a first limiting engagement part (213), and the rotating module (220) is connected to a second limiting engagement part (242) that abuts against and limits the first limiting engagement part (213).

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