Knob assembly and food processor

Abstract

The invention relates to the technical field of household appliances, and discloses a knob assembly and a food processor. The knob assembly comprises a circuit board support which is connected to a shell of the household appliance, and a knob installation opening is formed in the circuit board support; the circuit board is detachably connected with the circuit board bracket; the encoder is arranged between the circuit board support and the circuit board, and the encoder is limited on the circuit board and electrically connected with the circuit board; and the adjusting knob passes through the knob mounting port to act on the encoder and is suitable for driving the encoder to generate angular displacement under the action of external force. According to the knob assembly, space distribution in the shell of the household appliance can be more reasonable, arrangement of other components is facilitated, the utilization rate of the space in the shell can be improved, and the structure of the household appliance can be more compact.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a knob assembly and a food processor. Background Art

[0002] The existing home appliances have a variety of function selection modes, such as bulge button type, knob type and touch button type. For example, home appliances such as humidifiers, microwave ovens, electric ovens, electric fans and food processors usually use knob components for function selection. Taking a food processor as an example, a knob-type food processor includes a housing, a circuit board, an encoder and an adjustment knob.

[0003] In the prior art, household appliances with knob assemblies need to provide a support structure inside the housing in order to limit the encoder and the circuit board. Since the outer ring of the encoder of the knob assembly needs to rotate with the adjustment knob, it is not convenient to provide a support structure between the housing and the encoder. The existing bracket for supporting and limiting the circuit board is generally arranged below the circuit board and supported between the circuit board and the bottom wall of the housing, which results in a large volume of the bracket, a large waste of internal space of the appliance, and is not conducive to the arrangement of other components. Summary of the invention

[0004] In view of this, the present invention provides a knob assembly and a food processor to solve the problem in the prior art that the circuit board bracket of the knob assembly occupies a large internal space of the appliance, which is not conducive to the arrangement of other components.

[0005] In a first aspect, the present invention provides a knob assembly, comprising: a circuit board bracket, which is connected to a housing of a household appliance, and a knob mounting opening is formed on the circuit board bracket; a circuit board, which is detachably connected to the circuit board bracket; an encoder, which is arranged between the circuit board bracket and the circuit board, the encoder is limited to the circuit board and is electrically connected to the circuit board; an adjusting knob, which passes through the knob mounting opening and acts on the encoder, and is suitable for driving the encoder to undergo angular displacement under the action of an external force.

[0006] Beneficial effects:

[0007] The knob assembly of the present invention uses a circuit board bracket arranged on the housing of the household appliance and around the adjustment knob to support and limit the circuit board, and fixes the encoder on the circuit board, thereby fully utilizing the space between the circuit board and the housing, and there is no need to set a bracket on the lower side of the circuit board or the side away from the encoder to support and limit it, thereby making a more reasonable allocation of the space inside the housing, avoiding the waste of space inside the housing caused by setting the circuit board bracket, which is not conducive to the arrangement of other components. Therefore, the knob assembly of the present invention can make the space distribution inside the housing of the household appliance more reasonable, which is conducive to the arrangement of other components, helps to improve the space utilization rate inside the housing, and can make the structure of the household appliance more compact.

[0008] In an optional embodiment, a first limiting column is formed on one of the circuit board bracket and the circuit board, and a first limiting hole suitable for being sleeved on the first limiting column is formed on the other of the circuit board bracket and the circuit board; and / or,

[0009] A first card and part are formed on one of the circuit board bracket and the circuit board, and a second card and part corresponding to the first card and part are formed on the other of the circuit board bracket and the circuit board, and the second card and part is suitable for engaging with the first card and part; and / or,

[0010] The circuit board bracket and circuit board screw connection.

[0011] Beneficial effects:

[0012] By such arrangement, the first limiting column and the first limiting hole can guide and pre-position the circuit board bracket and the circuit board to guide the first clamping part and the second clamping part to clamp with each other, and facilitate the operator to use screws to screw the circuit board bracket and the circuit board.

[0013] When the circuit board bracket and the circuit board are connected to each other through the cooperation between the first limiting column and the first limiting hole, the user can directly plug the circuit board into the circuit board bracket, and the operation is simple and convenient.

[0014] When the circuit board bracket and the circuit board are connected to each other through the snap-fitting between the first snap-fit ​​part and the second snap-fit ​​part, the operation is simple and fast, and the reliability is high.

[0015] When the circuit board bracket and circuit board screw are connected, the reliability is high.

[0016] In an optional embodiment, the knob assembly further includes a display assembly disposed on a side of the adjustment knob away from the circuit board.

[0017] Beneficial effects:

[0018] The circuit board assembly can be used to display the mode name and current usage status of the home appliance.

[0019] In an optional embodiment, the display component includes:

[0020] The display module bracket is at least partially disposed in the adjusting knob, a first through hole communicating with the knob mounting opening is formed on the adjusting knob, and the circuit board bracket passes through the first through hole and is connected to the inner ring of the encoder;

[0021] A display module is fixedly arranged on a side of the display module bracket away from the circuit board;

[0022] An elastic pad is sandwiched between the display module bracket and the display module;

[0023] The display window is covered on the display module and is fixedly connected to the display module bracket.

[0024] Beneficial effects:

[0025] Since a spike-shaped solder is formed on one side of the display module close to the display bracket, once the display window exerts a large pressing force on the display module, the spikes behind the display module may easily damage the display module bracket. This requires that the display window be set to have a certain distance from the display module to avoid damaging the display module bracket. Furthermore, since the display window is generally an injection molded part with a large dimensional tolerance, the distance consistency between the display module and the display window is poor, which may easily affect the display effect of the display component.

[0026] The knob assembly of the present invention is provided with an elastic pad, and when the display window is pressed against the display module, the elastic pad can be compressed and play a buffering role, thereby preventing the sharp thorns on the back of the display module from damaging the display module bracket. Therefore, the display module of the present invention can ensure zero gap assembly between the display window and the display module to ensure the display effect, and is not easy to damage the display bracket.

[0027] In an optional embodiment, a second via hole is formed on the circuit board, and the knob assembly further includes a wire, a first end of the wire is connected to the display module, and a second end of the wire passes through the first via hole and a second via hole in the inner ring of the encoder to connect to the circuit board.

[0028] In an optional embodiment, a mounting cavity communicating with the knob mounting opening is formed on a side of the adjusting knob away from the circuit board, and the display module bracket includes:

[0029] A support portion is disposed in the mounting cavity, and the display module is fixedly disposed on the support portion;

[0030] The connecting part is connected to one side of the supporting part, and the connecting part passes through the first through hole and is connected to the inner ring of the encoder through a circumferential limiting structure.

[0031] Beneficial effects:

[0032] Through such an arrangement, when the adjusting knob is manipulated and rotates along its own axis, the display module bracket can remain stationary, and the display module arranged thereon also remains stationary, so as to avoid the rotation of the display component and interfere with the user's reading of information on the display component, and at the same time prevent the wires behind the display module from being aged and damaged due to the rotation of the adjusting knob.

[0033] In an optional embodiment, the connecting portion includes a third clip and portion connected to a side of the supporting portion close to the circuit board, and the inner ring of the encoder is provided with a fourth clip and portion suitable for engaging with the third clip and portion; and / or,

[0034] The connecting portion includes a first arcuate supporting wall connected to a side of the supporting portion close to the circuit board. The inner ring of the encoder is arranged around the outer ring of the first arcuate supporting wall. The first arcuate supporting wall and the inner ring of the encoder are connected via a circumferential limiting structure.

[0035] Beneficial effects:

[0036] The third engaging portion can limit the connection portion along the axial direction of the knob assembly when engaging with the fourth engaging portion. The first arcuate supporting wall can abut against the inner ring of the encoder in a shape-matching manner, thereby preventing shaking between the connection portion and the encoder. The first arcuate supporting wall is connected to the inner ring of the encoder through a circumferential limiting structure, and the inner ring of the encoder can be used to limit the connection portion and even the display assembly.

[0037] In an optional implementation, the third clamping portion and the first arc-shaped supporting wall are spaced apart from each other along the circumference of the display module bracket.

[0038] Beneficial effects:

[0039] The third engaging portion can limit the connection portion along the axial direction of the knob assembly when engaging with the fourth engaging portion. The first arcuate supporting wall can abut against the inner ring of the encoder in a shape-matching manner, thereby preventing shaking between the connection portion and the encoder. The first arcuate supporting wall is connected to the inner ring of the encoder through a circumferential limiting structure, and the inner ring of the encoder can be used to limit the connection portion and even the display assembly.

[0040] In an optional embodiment, a plurality of first card slots are formed on a side of the support portion away from the display module, the plurality of first card slots are arranged around the edge of the support portion, and a plurality of first buckles are formed on the edge of the display module to pass through the edge of the support portion and engage with the first card slots; or,

[0041] A plurality of first card slots are formed on one side of the display module away from the support portion. The plurality of first card slots are arranged around the edge of the display module. A plurality of first buckles are formed on the edge of the support portion and pass through the edge of the display module and engage with the first card slots.

[0042] Beneficial effects:

[0043] The first buckle can constrain the distance between the display module and the display module bracket when engaging with the first slot, so that the display module compresses the elastic pad, while preventing the display module from shifting along its own plane, thereby damaging the display effect.

[0044] In an optional embodiment, a plurality of second card slots are formed on a side of the support portion away from the display window, the plurality of second card slots are arranged around the edge of the support portion, and a plurality of second buckles are formed at the edge of the display window that pass through the edge of the support portion and engage with the second card slots; or,

[0045] A plurality of second card slots are formed on one side of the display window away from the support portion, and the plurality of second card slots are arranged around the edge of the display window. A plurality of second buckles are formed on the edge of the support portion and pass through the edge of the display window and engage with the second card slots.

[0046] Beneficial effects:

[0047] The second buckle and the second slot are engaged with each other, which can not only restrict the distance between the display window and the display module bracket so that the display window is closely attached to the display module, but also prevent the display window from rotating to cause wear on the display module.

[0048] In an optional implementation, an annular groove suitable for accommodating the elastic pad and limiting the elastic pad is formed on the display module bracket.

[0049] Beneficial effects:

[0050] The annular groove can prevent the elastic pad from shifting during the assembly process, resulting in uneven force on the display module, or the elastic pad cannot completely cover the spikes of the display module.

[0051] In an optional embodiment, the adjustment knob includes:

[0052] The knob body is arranged on a side of the circuit board bracket away from the circuit board;

[0053] The operating part is connected to the side of the knob body close to the shell. The operating part passes through the knob installation opening and is connected to the outer side of the encoder through a circumferential limiting structure.

[0054] Beneficial effects:

[0055] The operator can hold and rotate the knob body to rotate the outer ring of the manipulation portion carrying the encoder, thereby converting the angular displacement into an electrical signal through the encoder.

[0056] In an optional embodiment, the operating portion includes a fifth clip and portion connected to a side of the knob body close to the circuit board, and the outer ring of the encoder is provided with a sixth clip and portion suitable for engaging with the fifth clip and portion; and / or,

[0057] The operating part also includes a second arc-shaped support wall connected to a side of the knob body close to the circuit board. The second arc-shaped support wall is arranged around the outer ring of the encoder. The second arc-shaped support wall is connected to the outer ring of the encoder through a circumferential limiting structure.

[0058] Beneficial effects:

[0059] The knob assembly can be axially limited by the fifth and sixth clamping parts. The second arc-shaped support wall can be used to abut against the outer ring of the encoder in a shape-matched manner, thereby preventing the knob assembly from shaking relative to the encoder. The circumferential limiting structure is preferably, but not limited to, a combination of a limiting convex portion and a limiting concave portion.

[0060] In an optional embodiment, the knob assembly further includes a knob decoration piece covering the circuit board bracket, a clearance opening is formed on the knob decoration piece, and the operating part passes through the clearance opening and is connected to the outer ring of the encoder.

[0061] Beneficial effects:

[0062] The knob decoration is used to cover the connection between the circuit board bracket and the housing, thereby improving the aesthetics of the appearance of the household appliance.

[0063] In an optional embodiment, the adjustment knob further includes an axial limiting structure passing through the avoidance opening and abutting against a side of the knob decoration component close to the circuit board; and / or,

[0064] The adjusting knob also includes a rotation support structure that abuts against the inner circumference of the avoidance opening.

[0065] Beneficial effects:

[0066] The axial limiting structure can be optionally an annular flange formed on the adjusting knob, which is suitable for passing through the avoidance opening of the knob decoration and abutting against a side of the knob decoration close to the circuit board. The rotation support structure is suitable for rotationally abutting against the inner circumference of the avoidance opening, which helps to improve the coaxiality of the adjusting knob.

[0067] In an optional embodiment, the middle portion of the knob decoration is inclined toward the direction close to the circuit board to form a support ring wall, and the support ring wall is suitable for forming an avoidance opening. The axial limiting structure includes a hook that extends into the avoidance opening and hooks the end of the support ring wall away from the knob body.

[0068] Beneficial effects:

[0069] By such arrangement, when the adjusting knob is inserted into the avoidance opening, the inner circumference of the supporting ring wall is suitable for guiding the hook and exerting pressure on the hook in the direction close to the rotating shaft of the adjusting knob. After the hook passes through the supporting ring wall, the hook loses the pressure of the supporting ring wall, and thus recovers its original shape by its own elastic restoring force, and hooks the end of the supporting ring wall away from the knob body.

[0070] In an optional embodiment, an abutment rib is formed at the position where the supporting ring wall abuts against the hook, and the abutment rib is suitable for interference fit with the hook.

[0071] Beneficial effects:

[0072] It can prevent the matching gap between the supporting ring wall and the hook from being too large, thereby affecting the hand feel when the adjusting knob is turned.

[0073] In an optional embodiment, the rotation support structure includes a third arcuate support wall connected to a side of the knob body close to the circuit board, a support ring wall is arranged around an outer circle of the third arcuate support wall, and the third arcuate support wall and the hook are arranged at intervals along the circumference of the knob body.

[0074] Beneficial effects:

[0075] By means of such an arrangement, it is possible to prevent the adjusting knob from shaking during the rotation process and ensure that the adjusting knob is not likely to fall off from the housing.

[0076] In a second aspect, the present invention further provides a food processor, comprising:

[0077] A housing, wherein a knob assembly opening is provided on the housing;

[0078] The knob assembly of the first aspect of the present invention is arranged at the knob assembly opening and connected to the housing.

[0079] Beneficial effects:

[0080] The food processor of the second aspect of the present invention includes or uses the knob assembly of the first aspect of the present invention, and thus has its beneficial effect, namely, it can make the space distribution inside the housing of the household appliance more reasonable, which is conducive to the arrangement of other components, helps to improve the space utilization inside the housing, and makes the structure more compact.

[0081] In an optional embodiment, a plurality of avoidance through holes arranged around the knob assembly opening are formed on the shell, the knob decoration of the knob assembly is arranged outside the shell, and the circuit board bracket of the knob assembly is arranged inside the shell, and a screw column suitable for passing through the avoidance through hole is formed on one of the knob decoration and the circuit board bracket, and a limiting groove suitable for accommodating the screw column and limiting it is formed on the other of the knob decoration and the circuit board bracket, and the screw column and the limiting groove are connected by screws.

[0082] Beneficial effects:

[0083] By such an arrangement, the screw column can first pass through the shell and be inserted into the limiting groove, thereby pre-positioning the knob decoration and the circuit board bracket on the shell, so that the operator can use the same screw to lock the knob decoration and the circuit board bracket on the shell at the same time, which not only helps to simplify the assembly process of the operator, but also can effectively fix the circuit board on the shell without adding a circuit board bracket, and use the shell as a carrier to form a sandwich-like structure between the circuit board bracket shell and the knob decoration, with good integrity.

[0084] In addition, the screws can apply a preload to the housing and circuit board bracket during tightening, thereby avoiding shaking caused by part size tolerances and assembly tolerances.

[0085] In an optional embodiment, a plurality of seventh clips and parts are formed on the knob decoration, a plurality of eighth clips and parts corresponding to the plurality of seventh clips and parts are formed on the housing, and the seventh clips and parts are suitable for being clipped with the eighth clips and parts; and,

[0086] A second limiting column is formed on one of the knob decoration piece and the shell, and a second limiting hole suitable for being sleeved on the second limiting column is formed on the other of the knob decoration piece and the shell.

[0087] In an optional embodiment, a plurality of ninth cards and parts are formed on the housing, and the ninth cards and parts are arranged around the knob assembly port, and a plurality of tenth cards and parts corresponding to the ninth cards and parts are formed at the edge of the circuit board bracket, and the ninth cards and parts are suitable for engaging with the tenth cards and parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0089] Figure 1 is a cross-sectional view of a food processor according to an embodiment of the present invention;

[0090] Figure 2 is a three-dimensional diagram of a food processor according to an embodiment of the present invention;

[0091] Figure 3 An exploded view of a food processor according to an embodiment of the present invention;

[0092] Figure 4 A three-dimensional diagram of a circuit board bracket of a food processor according to an embodiment of the present invention;

[0093] Figure 5 It is a rear view of the circuit board bracket of the food processor according to the embodiment of the present invention;

[0094] Figure 6 It is a front view of a circuit board bracket of a food processor according to an embodiment of the present invention;

[0095] Figure 7 It is a front view of the circuit board bracket and the circuit board of the food processor according to the embodiment of the present invention in the assembled state;

[0096] Figure 8A side view of a circuit board bracket and a circuit board of a food processor according to an embodiment of the present invention in an assembled state;

[0097] Fig. 9 It is a rear view of the circuit board bracket and the circuit board of the food processor according to the embodiment of the present invention in an assembled state;

[0098] Fig.10 It is a cross-sectional view of a food processor according to an embodiment of the present invention, with its adjustment knob hidden;

[0099] Fig.11 A front view of a housing of a food processor according to an embodiment of the present invention;

[0100] Fig.12 It is a front view of a knob decoration of a food processor according to an embodiment of the present invention;

[0101] Fig.13 It is a side view of a knob decoration of a food processor according to an embodiment of the present invention;

[0102] Fig.14 It is a rear view of the knob decoration of the food processor according to the embodiment of the present invention;

[0103] Fig.15 A rear view of a display assembly of a food processor according to an embodiment of the present invention;

[0104] Fig.16 is a side sectional view of a display assembly of a food processor according to an embodiment of the present invention;

[0105] Fig.17 A rear view of a display module bracket of a display assembly of a food processor according to an embodiment of the present invention;

[0106] Fig.18 A front view of a display module bracket of a display assembly of a food processor according to an embodiment of the present invention;

[0107] Fig.19 A side view of a display window of a display assembly of a food processor according to an embodiment of the present invention;

[0108] Fig. 20 It is a cross-sectional view of the adjustment knob and the knob decoration of the food processor according to the embodiment of the present invention in the assembled state;

[0109] Fig.21 An encoder of a food processor according to an embodiment of the present invention;

[0110] Fig. 22 It is a cross-sectional view of an adjustment knob of a food processor according to an embodiment of the present invention.

[0111] Description of reference numerals:

[0112] 1. Circuit board bracket; 101. First limiting column; 102. First clamping part; 103. Limiting groove; 104. Tenth clamping part;

[0113] 2. Circuit board; 201. First limiting hole; 202. Second clamping part;

[0114] 3. Encoder; 301. Fourth card and part; 302. Sixth card and part;

[0115] 4. Adjustment knob; 401. Installation cavity; 402. Knob body; 4031. Fifth clamping part; 4032. Second arc-shaped support wall; 404. Hook; 405. Third arc-shaped support wall;

[0116] 5. Display assembly; 501. Display module bracket; 5011. Support part; 50112. First card slot; 50113. Second card slot; 50114. Annular groove; 5012. Connecting part; 50121. Third card and part; 50122. First arc-shaped supporting wall; 502. Display module; 5021. First buckle; 503. Elastic pad; 504. Display window; 5041. Second buckle;

[0117] 6. Knob decoration; 601. Avoidance; 602. Support ring wall; 603. Screw column; 604. Seventh clamping part; 605. Second limiting column;

[0118] 7. Shell; 701. Knob assembly opening; 702. Avoidance through hole; 703. Eighth clip and part; 704. Ninth clip and part; 705. Second limit hole. DETAILED DESCRIPTION

[0119] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0120] Combine the following Figures 1 to 22 , describing an embodiment of the present invention.

[0121] According to an embodiment of the present invention, on the one hand, a knob assembly is provided, comprising a circuit board bracket 1, a circuit board 2, an encoder 3 and an adjusting knob 4. The circuit board bracket 1 is connected to a housing 7 of a household appliance. A knob mounting opening is formed on the circuit board bracket 1. The circuit board 2 is detachably connected to the circuit board bracket 1. The encoder 3 is arranged between the circuit board bracket 1 and the circuit board 2. The encoder 3 is limited to the circuit board 2 and is electrically connected to the circuit board 2. The adjusting knob 4 acts on the encoder 3 through the knob mounting opening, and is suitable for driving the encoder 3 to undergo angular displacement under the action of an external force.

[0122] The knob assembly of the present invention uses a circuit board bracket 1 arranged on the housing 7 of the household appliance and around the adjustment knob 4 to support and limit the circuit board 2, and the encoder 3 is fixedly arranged on the circuit board 2, thereby making full use of the space between the circuit board 2 and the housing 7, and there is no need to set a bracket on the lower side of the circuit board 2 or on the side away from the encoder 3 to support and limit it, thereby making a more reasonable allocation of the space inside the housing 7, avoiding the waste of space inside the housing 7 caused by setting the circuit board bracket 1 below the circuit board 2, which is not conducive to the arrangement of other components. Therefore, the knob assembly of the present invention can make the space distribution inside the housing 7 of the household appliance more reasonable, which is conducive to the arrangement of other components, helps to improve the space utilization rate inside the housing 7, and can make the structure of the household appliance more compact.

[0123] The encoder 3 is preferably, but not limited to, fixed to the circuit board 2 by riveting, clamping or threaded connection. In one embodiment, the encoder 3 is fixed to the circuit board 2 by soldering.

[0124] The circuit board bracket 1 can be detachably connected to the outer shell of the food processor, for example, the circuit board bracket 1 can be connected to the circuit board 2 by means of clamping, riveting or threading. With such a configuration, the operator can pre-install the circuit board 2 on the circuit board bracket 1, and then connect the circuit board bracket 1 to the outer shell 7.

[0125] As an alternative embodiment, the circuit board holder 1 is connected to the housing 7 in one piece.

[0126] In one embodiment, a first limiting column 101 is formed on one of the circuit board bracket 1 and the circuit board 2, and a first limiting hole 201 suitable for being sleeved on the first limiting column 101 is formed on the other of the circuit board bracket 1 and the circuit board 2; and / or,

[0127] A first clamping portion 102 (see FIG. Figure 4 and Figure 5 ), the other of the circuit board bracket 1 and the circuit board 2 is formed with a second card and part 202 (see Fig. 9), the second card and portion 202 is adapted to engage with the first card and portion 102; and / or,

[0128] The circuit board bracket 1 and the circuit board 2 are screwed together (see Fig. 9 ).

[0129] By such a configuration, the first limiting column 101 and the first limiting hole 201 can guide and pre-position the circuit board bracket 1 and the circuit board 2, so as to guide the first card and part 102 and the second card and part 202 to be engaged with each other, and facilitate the operator to use screws to screw the circuit board bracket 1 and the circuit board 2.

[0130] As a convertible embodiment, a first limiting column 101 is formed on one of the circuit board bracket 1 and the circuit board 2, and a first limiting hole 201 suitable for being sleeved on the first limiting column 101 is formed on the other of the circuit board bracket 1 and the circuit board 2. The circuit board bracket 1 and the circuit board 2 are connected to each other through the cooperation between the first limiting column 101 and the first limiting hole 201, and the user can directly plug the circuit board 2 into the circuit board bracket 1, which is simple and convenient to operate.

[0131] As another convertible embodiment, a first card and portion 102 is formed on one of the circuit board bracket 1 and the circuit board 2, and a second card and portion 202 corresponding to the first card and portion 102 is formed on the other of the circuit board bracket 1 and the circuit board 2. The circuit board bracket 1 and the circuit board 2 are connected to each other through the snap-fitting between the first card and portion 102 and the second card and portion 202, which is simple, fast and highly reliable.

[0132] The circuit board bracket 1 and the circuit board 2 are screw-connected, and the reliability is high. Preferably, there are at least two first limiting columns 101 , which are symmetrically arranged along the center of the knob installation opening, and the circuit board 2 can be reliably limited on the circuit board bracket 1 .

[0133] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment, the knob assembly further comprises a display assembly 5 disposed on a side of the adjusting knob 4 away from the circuit board 2. The circuit board 2 assembly can be used to display the mode name and current usage status of the household appliance.

[0134] Since a spike-shaped solder is formed on one side of the display module 502 close to the display bracket, once the display window 504 has a large pressing force on the display module 502, it is easy for the spikes behind the display module 502 to damage the display module bracket 501. This requires that the display window 504 be set to have a certain distance from the display module 502 to avoid damaging the display module bracket 501. Since the display window 504 is generally an injection molded part with a large dimensional tolerance, the distance consistency between the display module 502 and the display window 504 is poor, which easily affects the display effect of the display component 5.

[0135] In one embodiment, Fig.16 As shown, the display assembly 5 includes a display module bracket 501, a display module 502, an elastic pad 503 and a display window 504. The display module bracket 501 is at least partially arranged in the adjustment knob 4, and a first through hole connected to the knob installation port is formed on the adjustment knob 4. The display module bracket 501 is connected to the inner ring of the encoder 3 through the first through hole. The display module 502 is fixedly arranged on a side of the display module bracket 501 away from the circuit board 2. The elastic pad 503 is sandwiched between the display module bracket 501 and the display module 502. The display window 504 is covered on the display module 502 and fixedly connected to the display module bracket 501.

[0136] The knob assembly of the present invention is provided with an elastic pad 503, and when the display window 504 presses the display module 502, the elastic pad 503 can be compressed and play a buffering role, thereby preventing the sharp thorns on the back of the display module 502 from damaging the display module bracket 501. Therefore, the display module 502 of the present invention can ensure zero gap assembly between the display window 504 and the display module 502 to ensure the display effect, and is not easy to damage the display bracket.

[0137] The elastic pad 503 is preferably but not limited to being made of elastic materials such as rubber, sponge or foam. Preferably, a mask is also attached to the display module 502 for function display.

[0138] In one embodiment, the circuit board 2 is formed with a second via hole, and the knob assembly further includes a wire, a first end of the wire is connected to the display module 502 , and a second end of the wire passes through the first via hole, the inner ring of the encoder and the second via hole to connect to the circuit board 2 .

[0139] In one embodiment, a mounting cavity 401 communicating with the knob mounting port is formed on a side of the adjusting knob 4 away from the circuit board 2. The display module bracket 501 includes a supporting portion 5011 and a connecting portion 5012. The supporting portion 5011 is disposed in the mounting cavity 401. The display module 502 is fixedly disposed on the supporting portion 5011. The connecting portion 5012 is connected to one side of the supporting portion 5011 through a first via hole. The connecting portion 5012 is connected to the inner ring of the encoder 3 through a circumferential limiting structure.

[0140] Through such an arrangement, when the adjusting knob 4 is manipulated and rotates along its own axis, the display module bracket 501 can remain stationary, and the display module 502 arranged thereon also remains stationary, so as to avoid the display component 5 rotating and interfering with the user's reading of the information on the display component 5, and at the same time prevent the wires behind the display module 502 from being aged and damaged due to the rotation of the adjusting knob 4.

[0141] In one embodiment, the connecting portion 5012 includes a third clip portion 50121 connected to a side of the supporting portion 5011 close to the circuit board 2. The inner ring of the encoder 3 is provided with a fourth clip portion 301 suitable for engaging with the third clip portion 50121; and / or,

[0142] The connecting portion 5012 includes a first arcuate supporting wall 50122 connected to a side of the supporting portion 5011 close to the circuit board 2. The inner ring of the encoder 3 is arranged around the outer ring of the first arcuate supporting wall 50122. The first arcuate supporting wall 50122 is connected to the inner ring of the encoder 3 via a circumferential limiting structure.

[0143] like Fig.16 , Fig.17 and Fig.18 As shown, the third engaging portion 50121 can limit the connection portion 5012 along the axial direction of the knob assembly when engaging with the fourth engaging portion 301. The first arcuate supporting wall 50122 can abut against the inner ring of the encoder 3 in a shape-matching manner, thereby preventing the connection portion 5012 and the encoder 3 from shaking. The first arcuate supporting wall 50122 is connected to the inner ring of the encoder 3 through a circumferential limiting structure, and the connection portion 5012 and even the display assembly 5 can be limited by the inner ring of the encoder 3.

[0144] The circumferential limiting structure preferably includes, but is not limited to, a limiting groove 103 provided on one of the connecting portion 5012 and the inner ring of the encoder 3 and a limiting protrusion provided on the other of the connecting portion 5012 and the inner ring of the encoder 3 .

[0145] In one embodiment, the third clamping portion 50121 and the first arc-shaped supporting wall 50122 are arranged at intervals along the circumference of the display module bracket 501. By so arranging, the connecting portion 5012 can limit the display assembly 5 circumferentially and axially, and the inner ring of the encoder 3 is subjected to uniform force.

[0146] In one embodiment, a plurality of first slots 50112 are formed on one side of the support portion 5011 away from the display module 502. The plurality of first slots 50112 are arranged around the edge of the support portion 5011. The edge of the display module 502 is formed with a plurality of first buckles 5021 that pass through the edge of the support portion 5011 and are engaged with the first slots 50112; or,

[0147] A plurality of first card slots 50112 are formed on one side of the display module 502 away from the support portion 5011. The plurality of first card slots 50112 are arranged around the edge of the display module 502. A plurality of first buckles 5021 that pass through the edge of the display module 502 and engage with the first card slots 50112 are formed at the edge of the support portion 5011.

[0148] The first buckle 5021 can constrain the distance between the display module 502 and the display module bracket 501 when it is engaged with the first slot 50112, so that the display module 502 compresses the elastic pad 503, and prevents the display module 502 from shifting along its own plane, resulting in damage to the display effect.

[0149] In one embodiment, a plurality of second slots 50113 are formed on one side of the support portion 5011 away from the display window 504. The plurality of second slots 50113 are arranged around the edge of the support portion 5011. The edge of the display window 504 is formed with a plurality of second buckles 5041 that pass through the edge of the support portion 5011 and are engaged with the second slots 50113; or,

[0150] like Fig.19 As shown, a plurality of second slots 50113 are formed on one side of the display window 504 away from the support portion 5011, and the plurality of second slots 50113 are arranged around the edge of the display window 504. A plurality of second buckles 5041 passing through the edge of the display window 504 and engaging with the second slots 50113 are formed at the edge of the support portion 5011.

[0151] By engaging the second buckle 5041 and the second slot 50113 , the distance between the display window 504 and the display module bracket 501 can be restricted so that the display window 504 is tightly attached to the display module 502 , and the display window 504 can be prevented from rotating to wear the display module 502 .

[0152] In one embodiment, the display module bracket 501 is formed with an annular groove 50114 suitable for accommodating and limiting the elastic pad 503. The annular groove 50114 can prevent the elastic pad 503 from shifting during the assembly process, resulting in uneven force on the display module 502, or the elastic pad 503 cannot completely cover the spikes on the display module 502.

[0153] like Fig. 20 and Fig. 22 As shown, in one embodiment, the adjustment knob 4 includes a knob body 402 and an operating part. The knob body 402 is disposed on a side of the circuit board bracket 1 away from the circuit board 2. The operating part is connected to a side of the knob body 402 close to the housing 7. The operating part passes through the knob installation opening and is connected to the outer peripheral limit structure of the encoder 3.

[0154] The operator can hold and rotate the knob body 402 to rotate the manipulation portion carrying the outer ring of the encoder 3 , thereby converting the angular displacement into an electrical signal through the encoder 3 .

[0155] In one embodiment, the manipulation portion includes a fifth clip 4031 connected to the side of the knob body 402 close to the circuit board 2, and the outer ring of the encoder 3 is provided with a sixth clip 302 suitable for engaging with the fifth clip 4031 (see Fig.21 ); and / or,

[0156] The operating part also includes a second arc-shaped support wall 4032 connected to the side of the knob body 402 close to the circuit board 2. The second arc-shaped support wall 4032 is arranged around the outer ring of the encoder 3. The second arc-shaped support wall 4032 is connected to the outer ring of the encoder 3 through a circumferential limiting structure.

[0157] The knob assembly can be axially limited by the fifth locking portion 4031 and the sixth locking portion 302. The second arc-shaped support wall 4032 can be used to abut against the outer ring of the encoder 3 in a shape-matched manner, thereby preventing the knob assembly from shaking relative to the encoder 3. The circumferential limiting structure is preferably, but not limited to, a combination of a limiting convex portion and a limiting concave portion.

[0158] like Fig.10 and Fig.11 As shown, in one embodiment, the knob assembly further includes a knob decoration piece 6 covering the circuit board bracket 1. A clearance opening 601 is formed on the knob decoration piece 6. The operating part passes through the clearance opening 601 and is connected to the outer ring of the encoder 3.

[0159] The knob decoration 6 is used to cover the connection between the circuit board bracket 1 and the housing 7, thereby improving the aesthetics of the appearance of the household appliance.

[0160] In one embodiment, Fig.12 , Fig.13 and Fig.14 As shown, the adjusting knob 4 also includes an axial limiting structure that passes through the avoidance opening 601 and abuts against the side of the knob decoration 6 close to the circuit board 2. The adjusting knob 4 can be rotatably abutted against the rotating decoration through the axial limiting structure, and the knob decoration 6 can prevent the adjusting knob 4 from falling off.

[0161] The adjusting knob 4 further includes a rotation support structure that abuts against the inner circumference of the avoidance opening 601 .

[0162] The rotation support structure is suitable for rotationally abutting against the inner circumference of the avoidance opening 601 , which helps to improve the coaxiality of the adjustment knob 4 .

[0163] The axial limiting structure may be an annular flange formed on the adjusting knob 4 , which is suitable for passing through the avoidance opening 601 of the knob decoration 6 and abutting against a side of the knob decoration 6 close to the circuit board 2 .

[0164] In one embodiment, the middle portion of the knob decoration 6 is inclined toward the direction close to the circuit board 2 to form a support ring wall 602, and the support ring wall 602 is suitable for surrounding an avoidance opening 601. The axial limiting structure includes a hook 404 that extends into the avoidance opening 601 and hooks the side of the support ring wall 602 away from the knob body 402.

[0165] By such arrangement, when the adjusting knob 4 is inserted into the avoidance opening 601, the inner circumference of the supporting ring wall 602 is suitable for guiding the hook 404 and applying pressure in the direction close to the rotation axis of the adjusting knob 4 to the hook 404. After the hook 404 passes through the supporting ring wall 602, the hook 404 loses the pressure of the supporting ring wall 602, and thus recovers its original shape by its own elastic restoring force, and hooks the end of the supporting ring wall 602 away from the knob body 402.

[0166] Preferably, in one embodiment, the end surface of the support ring wall 602 is in a first plane, and the first plane is perpendicular to the rotation axis of the adjusting knob 4, so as to avoid the adjusting knob 4 from getting stuck during the rotation process. The end of the support ring wall 602 abutting against the hook 404 forms a contact rib, which is suitable for interference fit with the hook 404, so as to prevent the matching gap between the support ring wall 602 and the hook 404 from being too large, thereby affecting the feel of the adjusting knob 4 when it is rotated.

[0167] In one embodiment, the rotation support structure includes a third arc-shaped support wall 405 connected to a side of the knob body 402 close to the circuit board 2. The support ring wall 602 is arranged around the outer ring of the third arc-shaped support wall 405. The third arc-shaped support wall 405 and the hook 404 are arranged at intervals around the axis of the knob body 402.

[0168] By such arrangement, it is possible to prevent the adjusting knob 4 from shaking during the rotation process, and ensure that the adjusting knob 4 is not easy to fall off from the housing 7.

[0169] According to an embodiment of the present invention, on the other hand, a food processor is provided, comprising a housing 7 and a knob assembly. The housing 7 is provided with a knob assembly opening 701. The knob assembly is the knob assembly provided in the first aspect of the present invention, which is arranged at the knob assembly opening 701 and connected to the housing 7.

[0170] The food processor of the second aspect of the present invention includes or uses the knob assembly of the first aspect of the present invention, and thus has its beneficial effect, namely, it can make the space distribution inside the housing 7 of the household appliance more reasonable, which is conducive to the arrangement of other components, helps to improve the space utilization inside the housing 7, and makes the structure more compact.

[0171] In one embodiment, a plurality of avoidance through holes 702 are formed on the housing 7 and are arranged around the knob assembly opening 701. The knob decoration 6 of the knob assembly is arranged outside the housing 7. The circuit board bracket 1 of the knob assembly is arranged inside the housing 7. A screw column 603 suitable for passing through the avoidance through hole 702 is formed on one of the knob decoration 6 and the circuit board bracket 1. A limiting groove 103 suitable for accommodating and limiting the screw column 603 is formed on the other of the knob decoration 6 and the circuit board bracket 1. The screw column 603 is connected to the limiting groove 103 by screws.

[0172] By such a configuration, the screw column 603 can first pass through the shell 7 and be inserted into the limiting groove 103, thereby pre-positioning the knob decoration 6 and the circuit board bracket 1 on the shell 7, so that the operator can use the same screw to lock the knob decoration 6 and the circuit board bracket 1 on the shell 7 at the same time, which not only helps to simplify the assembly process of the operator, but also can effectively fix the circuit board 2 on the shell 7 without adding a circuit board bracket 1, and use the shell 7 as a carrier to form a sandwich-like structure between the circuit board bracket 1, the shell 7 and the knob decoration 6, with good integrity.

[0173] In addition, the screws can apply a pre-tightening force to the housing 7 and the circuit board bracket 1 during the tightening process, thereby avoiding shaking caused by part size tolerance and assembly tolerance.

[0174] The knob decoration 6 is preferably, but not limited to, fixed to the housing 7 by a riveting assembly, a clamping assembly, or a threaded connection assembly. Preferably, in one embodiment, a plurality of seventh clamps and portions 604 are formed on the knob decoration 6. A plurality of eighth clamps and portions 703 corresponding to the plurality of seventh clamps and portions 604 are formed on the housing 7, and the seventh clamps and portions 604 are adapted to be clamped with the eighth clamps and portions 703; and,

[0175] A second limiting column 605 is formed on one of the knob decoration 6 and the housing 7 . A second limiting hole 705 suitable for being sleeved on the second limiting column 605 is formed on the other of the knob decoration 6 and the housing 7 .

[0176] The second limiting column 605 can pass through the second limiting hole 705 and pre-position the knob decoration 6 on the housing 7 , while guiding the seventh engaging portion 604 to engage with the eighth engaging portion 703 .

[0177] The circuit board bracket 1 is preferably, but not limited to, connected to the housing 7 by a riveting assembly, a clamping assembly, or a threaded connection assembly. In one embodiment, a plurality of ninth clamps and parts 704 are formed on the housing 7. The ninth clamps and parts 704 are arranged around the knob assembly port 701, and a plurality of tenth clamps and parts 104 corresponding to the ninth clamps and parts 704 are formed at the edge of the circuit board bracket 1, and the ninth clamps and parts 704 are suitable for clamping with the tenth clamps and parts 104. The ninth clamps and parts 704 and the tenth clamps and parts 104 are preferably, but not limited to, the cooperation of a card slot and a buckle, the cooperation of a hook and a convex, etc.

[0178] Preferably, in one embodiment, the ninth clip portion 704 is at least two clip grooves evenly distributed around the knob assembly opening 701 , and the tenth clip portion 104 is at least two buckles arranged in one-to-one correspondence with the ninth clip portion 704 .

[0179] Next, the method of installing the knob assembly of the present invention on the housing 7 is described:

[0180] First, the encoder 3 is fixed to the circuit board 2 by soldering, and the circuit board bracket 1 is detachably connected to the circuit board 2 to form a circuit board 2 assembly, and the display module bracket 501, elastic pad 503, display module 502, mask and display window 504 are pre-installed together to form a display assembly 5.

[0181] Next, fix the circuit board bracket 1 of the circuit board 2 assembly on the inner side of the housing 7, assemble the knob decoration 6 to the outer side of the housing 7, and then install the operating part of the adjustment knob 4 on the knob decoration 6 through the knob installation opening.

[0182] Finally, the display assembly 5 is installed in the installation cavity 401 of the adjusting knob 4, and the assembly is completed.

[0183] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0184] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0185] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0186] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician in the field can easily make changes or modifications within the technical scope disclosed in the present invention, and such changes or modifications should be included in the protection scope of the present invention.

[0187] Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A knob assembly, characterized in that: include: A circuit board bracket (1) connected to a housing (7) of a household appliance, wherein a knob mounting opening is formed on the circuit board bracket (1); A circuit board (2) which is detachably connected to the circuit board bracket (1); An encoder (3) is arranged between the circuit board bracket (1) and the circuit board (2), the encoder (3) being located on the circuit board (2) and electrically connected to the circuit board (2); An adjusting knob (4) passes through the knob installation opening and acts on the encoder (3), and is suitable for driving the encoder (3) to cause angular displacement under the action of an external force.

2. The knob assembly according to claim 1, characterized in that: A first limiting column (101) is formed on one of the circuit board bracket (1) and the circuit board (2), and a first limiting hole (201) suitable for being sleeved on the first limiting column (101) is formed on the other of the circuit board bracket (1) and the circuit board (2); and / or, A first card and part (102) is formed on one of the circuit board bracket (1) and the circuit board (2), and a second card and part (202) corresponding to the first card and part (102) is formed on the other of the circuit board bracket (1) and the circuit board (2), and the second card and part (202) is suitable for engaging with the first card and part (102); and / or, The circuit board bracket (1) and the circuit board (2) are connected by screws.

3. The knob assembly according to claim 1, characterized in that: It also includes a display component (5) arranged on a side of the adjusting knob (4) away from the circuit board (2).

4. The knob assembly according to claim 3, characterized in that: The display component (5) comprises: a display module bracket (501), which is at least partially arranged in the adjusting knob (4), the adjusting knob (4) being formed with a first through hole connected to the knob mounting opening, and the circuit board bracket (1) passing through the first through hole and connected to the inner ring of the encoder (3); A display module (502) fixedly arranged on a side of the display module bracket (501) away from the circuit board (2); An elastic pad (503) sandwiched between the display module bracket (501) and the display module (502); A display window (504) is covered on the display module (502) and is fixedly connected to the display module bracket (501).

5. The knob assembly according to claim 4, characterized in that: A second via hole is formed on the circuit board (2), and the knob assembly also includes a wire, a first end of the wire is connected to the display module (502), and a second end of the wire passes through the first via hole and a second via hole in the inner ring of the encoder to be connected to the circuit board (2).

6. The knob assembly according to claim 4, characterized in that: A mounting cavity (401) communicating with the knob mounting opening is formed on a side of the adjusting knob (4) away from the circuit board (2), and the display module bracket (501) comprises: A support portion (5011) disposed in the mounting cavity (401), and the display module (502) is fixedly disposed on the support portion (5011); A connecting portion (5012) is connected to one side of the supporting portion (5011); the connecting portion (5012) passes through the first through hole and is connected to the inner ring of the encoder (3) via a circumferential limiting structure.

7. The knob assembly according to claim 6, characterized in that: The connecting portion (5012) comprises a third clip and part (50121) connected to a side of the supporting portion (5011) close to the circuit board (2), and the inner ring of the encoder (3) is provided with a fourth clip and part (301) suitable for engaging with the third clip and part (50121); and / or, The connecting portion (5012) comprises a first arc-shaped supporting wall (50122) connected to a side of the supporting portion (5011) close to the circuit board (2); the inner ring of the encoder (3) is arranged around the outer ring of the first arc-shaped supporting wall (50122); and the first arc-shaped supporting wall (50122) is connected to the inner ring of the encoder (3) via a circumferential limiting structure.

8. The knob assembly according to claim 7, characterized in that: The third clamping portion (50121) and the first arc-shaped supporting wall (50122) are arranged at intervals along the circumference of the display module bracket (501).

9. The knob assembly according to any one of claims 6 to 8, characterized in that: A plurality of first card slots (50112) are formed on a side of the support portion (5011) away from the display module (502); the plurality of first card slots (50112) are arranged around the edge of the support portion (5011); and a plurality of first buckles (5021) are formed on the edge of the display module (502) and pass through the edge of the support portion (5011) and engage with the first card slots (50112); or, A plurality of first card slots (50112) are formed on a side of the display module (502) away from the support portion (5011), and the plurality of first card slots (50112) are arranged around the edge of the display module (502), and a plurality of first buckles (5021) are formed on the edge of the support portion (5011) and pass through the edge of the display module (502) and engage with the first card slots (50112).

10. The knob assembly according to any one of claims 6 to 8, characterized in that: A plurality of second card slots (50113) are formed on a side of the support portion (5011) away from the display window (504); the plurality of second card slots (50113) are arranged around the edge of the support portion (5011); and a plurality of second buckles (5041) are formed on the edge of the display window (504) and pass through the edge of the support portion (5011) and engage with the second card slots (50113); or, A plurality of second card slots (50113) are formed on a side of the display window (504) away from the support portion (5011), and the plurality of second card slots (50113) are arranged around the edge of the display window (504), and a plurality of second buckles (5041) are formed at the edge of the support portion (5011) and pass through the edge of the display window (504) and engage with the second card slots (50113).

11. The knob assembly according to any one of claims 4 to 8, characterized in that: The display module bracket (501) is formed with an annular groove (50114) suitable for accommodating the elastic pad (503) and limiting its position.

12. The knob assembly according to any one of claims 1 to 8, characterized in that: The adjusting knob (4) comprises: A knob body (402) arranged on a side of the circuit board bracket (1) away from the circuit board (2); An operating portion is connected to a side of the knob body (402) close to the housing (7); the operating portion passes through the knob installation opening and is connected to the outside of the encoder (3) through a circumferential limiting structure.

13. The knob assembly according to claim 12, characterized in that: The operating portion comprises a fifth clip and part (4031) connected to a side of the knob body (402) close to the circuit board (2), and the outer ring of the encoder (3) is provided with a sixth clip and part (302) suitable for engaging with the fifth clip and part (4031); and / or, The operating portion also includes a second arc-shaped support wall (4032) connected to a side of the knob body (402) close to the circuit board (2), the second arc-shaped support wall (4032) being arranged around the outer ring of the encoder (3), and the second arc-shaped support wall (4032) and the outer ring of the encoder (3) being connected via a circumferential limiting structure.

14. The knob assembly according to claim 12, characterized in that: It also comprises a knob decoration (6) covering the circuit board bracket (1), a clearance opening (601) being formed on the knob decoration (6), and the operating part passes through the clearance opening (601) and is connected to the outer ring of the encoder (3).

15. The knob assembly according to claim 14, characterized in that: The adjusting knob (4) further comprises an axial limiting structure passing through the avoidance opening (601) and abutting against a side of the knob decorative component (6) close to the circuit board (2); and / or, The adjusting knob (4) further comprises a rotation support structure which abuts against the inner circumference of the avoidance opening (601).

16. The knob assembly according to claim 15, characterized in that: The middle portion of the knob decoration (6) is inclined in a direction close to the circuit board (2) to form a support ring wall (602), and the support ring wall (602) is suitable for surrounding the avoidance opening (601), and the axial limiting structure includes a hook (404) extending into the avoidance opening (601) and hooking the end of the support ring wall (602) away from the knob body (402).

17. The knob assembly according to claim 16, characterized in that: The supporting ring wall (602) is adapted to form an abutting convex rib at the position where it abuts against the hook (404), and the abutting convex rib is adapted to be interference fit with the hook (404).

18. The knob assembly according to claim 17, characterized in that: The rotation support structure comprises a third arc-shaped support wall (405) connected to a side of the knob body (402) close to the circuit board (2); the support ring wall (602) is arranged around the outer ring of the third arc-shaped support wall (405); the third arc-shaped support wall (405) and the hook (404) are arranged at intervals along the circumference of the knob body (402).

19. A food processor, characterized in that: include: A housing (7), wherein the housing (7) is provided with a knob assembly opening (701); The knob assembly according to any one of claims 1 to 18 is arranged at the knob assembly opening (701) and connected to the housing (7).

20. The food processor according to claim 19, characterized in that: The housing (7) is provided with a plurality of avoidance through holes (702) arranged around the knob assembly opening (701); the knob decoration (6) of the knob assembly is arranged outside the housing (7); the circuit board bracket (1) of the knob assembly is arranged inside the housing (7); a screw column (603) suitable for passing through the avoidance through hole (702) is formed on one of the knob decoration (6) and the circuit board bracket (1); a limiting groove (103) suitable for accommodating the screw column (603) and limiting the screw column (603) is formed on the other of the knob decoration (6) and the circuit board bracket (1); the screw column (603) and the limiting groove (103) are connected by screws.

21. The food processor according to claim 20, characterized in that: The knob decoration (6) is formed with a plurality of seventh clips and parts (604), the housing (7) is formed with a plurality of eighth clips and parts (703) corresponding to the plurality of seventh clips and parts (604) one by one, the seventh clips and parts (604) are suitable for being clipped with the eighth clips and parts (703); and, A second limiting column (605) is formed on one of the knob decoration (6) and the housing (7), and a second limiting hole (705) suitable for being sleeved on the second limiting column (605) is formed on the other of the knob decoration (6) and the housing (7).

22. The food processor according to claim 20, characterized in that: A plurality of ninth clips and parts (704) are formed on the housing (7), and the ninth clips and parts (704) are arranged around the knob assembly port (701). A plurality of tenth clips and parts (104) are formed at the edge of the circuit board bracket (1), and are arranged one-to-one with the ninth clips and parts (704), and the ninth clips and parts (704) are suitable for engaging with the tenth clips and parts (104).

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