Knob operating assembly and household appliance

Abstract

The application discloses a knob operating assembly and a household appliance, and belongs to the technical field of household appliances. The knob operating assembly comprises an operating knob, an encoder, a limiting piece connected with the base of the encoder, and the like. The encoder generates corresponding electrical signals in response to the action of the rotating shaft. The limiting piece is used for limiting the operating knob in the radial direction. The encoder indirectly limits the operating knob in the radial direction through the limiting piece. Since the limiting piece is connected with the base of the encoder to form an assembly, the coaxiality between the two can be maintained well. Moreover, the cooperation tolerance between the limiting piece and the operating knob is not limited by the assembly tolerance of other components, so that the cooperation tolerance between the limiting piece and the operating knob can be reduced as much as possible without affecting the action of the operating knob, the shaking feeling of the operating knob is reduced, and the operation experience is improved.

Description

[0001] The present application relates to the technical field of household appliances, in particular to a knob operating assembly and a household appliance.

[0002] With the improvement of living standards, people's pursuit of household appliances is getting higher and higher, and they hope to quickly and accurately set the mode they need. The operation of many household appliances is realized through a knob operating assembly. However, the existing knob operating assembly has a problem of large shaking due to component processing errors and assembly methods.

[0003] In order to improve the above-mentioned deficiencies, an operating assembly is disclosed in the utility model patent document with the publication number CN207987546U and the name of operating assembly and clothes processing device provided with the operating assembly, which comprises an operating knob, a peripheral wall unit, a substrate support member, an encoder, and a wiring substrate. The operating knob comprises a knob part and an action shaft unit, and the action shaft unit comprises an action shaft unit cylindrical part and an action shaft. The assembly sequence is that the encoder is passed through and fixed from the rear hole of the substrate support member, the wiring substrate is fixed at the rear side of the substrate support member, the peripheral wall unit is inserted from the front side of the substrate support member, then the action shaft unit is pressed into the knob part from the rear side, thereby forming the operating knob, and finally the operating knob is inserted into the encoder rod part from the front side of the substrate support member, the action shaft is inserted into the encoder rod part, and after assembly, the inner circumferential surface of the peripheral wall unit and the outer circumferential surface of the action shaft unit cylindrical part are in sliding contact. It is expected that the above-mentioned assembly structure can suppress the shaking of the operating knob when the user rotates the operating knob left and right.

[0004] ​​However, this utility model did not effectively solve the problem of wobbling at the mating parts of the knob structure. The user still experiences significant wobbling when operating the knob. The main reason is that the radial limiting of the operating knob is mainly achieved through the peripheral wall unit, and its mating clearance design value is relatively large. This is mainly caused by two factors: 1. In this patent, the operating knob is radially limited by the peripheral wall unit. In actual assembly, it is difficult to achieve a perfect zero-distance fit between the two parts, resulting in assembly tolerances. In this patent, a first assembly tolerance needs to be reserved when the encoder mates with the rear face of the base plate support member, and a second assembly tolerance needs to be reserved when the inner peripheral surface of the peripheral wall unit mates with the cylindrical part of the action shaft unit. Therefore, after actual assembly, if coaxial fit between the peripheral wall unit and the encoder is to be achieved, the limiting clearance between the peripheral wall unit and the cylindrical part of the action shaft unit must be enlarged, which is actually the sum of the first and second assembly tolerances. 2. The operating knob's actuating shaft is fully enclosed with the encoder rod. There is an axial tolerance misalignment between the encoder rod and the encoder base. When the operating knob is assembled onto the encoder rod, the coaxiality of the operating knob relative to the encoder is greatly affected by the rod's tolerance due to the enclosed fixing method. This means that when designing the limiting clearance between the peripheral wall unit and the cylindrical part of the actuating shaft unit, the design clearance must be further increased to account for this factor. As a result, the knob operating assembly experiences significant wobbling during use, and the fully enclosed fit is inconvenient for installation. [Summary of the Invention]

[0005] The purpose of this invention is to provide a knob operation component that can at least partially solve the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The knob operating assembly includes:

[0008] Operation knob; and,

[0009] An encoder has a base and a rotating shaft connected to the base, wherein an operating knob drives the rotating shaft to move synchronously, and the base generates a corresponding electrical signal in response to the movement of the rotating shaft; and...

[0010] A limiting member connected to the base is used to radially limit the operation knob.

[0011] The beneficial effects of adopting this solution are:

[0012] Based on the problem of the encoder knob shaking caused by the accumulated tolerance in the prior art, the present application proposes a scheme that the limiting piece for radially limiting the operation knob is connected to the base of the encoder, in other words, the encoder indirectly limits the operation knob in the radial direction through the limiting piece. Since the limiting piece is connected to the base of the encoder to form an assembly, the assembly tolerance between the limiting piece and the operation knob is not limited by the assembly tolerance of other components (such as the assembly tolerance when the encoder is assembled to the operation panel of a household appliance), so that the assembly tolerance between the limiting piece and the operation knob can be reduced as much as possible without affecting the operation of the operation knob, reducing the shaking feeling of the operation knob, and improving the operation experience.

[0013] As a preferred, the limiting piece is coaxial with the base, thereby reducing the influence of the assembly tolerance between the limiting piece and the base.

[0014] As a preferred, the limiting piece is coaxial with the rotating shaft, thereby ensuring that the rotating shaft and the operation knob have better coaxiality.

[0015] As a preferred, the operation knob comprises an operation part and a transmission part axially extended from one side of the operation part, the transmission part is inserted into the rotating shaft, and the operation part drives the rotating shaft to move synchronously through the transmission part.

[0016] By rotating the operation part to select the working mode, the transmission part rotates synchronously with the operation part and drives the rotating shaft of the encoder to move synchronously in the base to generate corresponding electrical signals.

[0017] As a preferred, the limiting piece comprises an assembly part and a cylindrical limiting part, the assembly part is connected to the base, and the limiting part is sleeved outside the transmission part to radially limit the transmission part.

[0018] The limiting part adopts a cylindrical structure, thereby radially limiting the transmission part in the whole circumference, being symmetrical and balanced, and having better radial limiting effect, so that the operation knob keeps the shaft center fixed during use, and the operation is smoother.

[0019] As a preferred, the part of the transmission part close to the operation part is radially limited by the limiting part.

[0020] The rotating shaft of the encoder is generally made of metal material, and after a large number of rotations, deformation such as bending may occur, so that the shaft center changes, the rotation center of the rotating shaft does not coincide with the shaft center when the rotating shaft rotates, and the swing phenomenon occurs, which drives the transmission part connected with the rotating shaft to swing, thereby affecting the stability of the operation knob. The limiting portion limits the transmission portion in the radial direction to improve the swing phenomenon. The closer the transmission portion is to the limiting structure, the smaller the swing amplitude is. In the present scheme, the transmission portion extends axially from the operation portion, so the closer the limiting position is to the operation portion, the more effectively the swing of the operation portion can be reduced, thereby reducing the influence of the shaft center deviation of the rotating shaft on the entire operation knob.

[0021] As a preferred, the assembling part has a through hole matched with the base, and the assembling part and the base are connected by at least one of interference fit, threaded structure, keyway structure and clamping structure.

[0022] As a preferred, the limiting part has a boss extending radially outward from the upper end, and the operation part is provided with a clamping hook clamped with the boss.

[0023] With the structure, when the operation knob is pressed into the limiting part, the boss drives the upper end of the limiting part to elastically deform inwardly, and the clamping hook is clamped into the lower end surface of the boss to realize the axial limiting of the operation knob and prevent the operation knob from being pulled out.

[0024] As a preferred, the operation part and the upper end surface of the limiting part have an axial spacing, the rotating shaft can be axially displaced relative to the base in response to the pressing action of the operation part, and the axial spacing is greater than or equal to the axial displacement.

[0025] The operation of the operation part includes a rotating action and a pressing action. The rotating shaft generates relative rotation and axial movement in the base in response to the synchronous action of the operation part. When the rotating shaft moves axially in the base, the transmission part synchronously slides axially in the limiting part. The axial movement of the rotating shaft in the base has a maximum preset value, i.e. a pressing stroke value. In order to smoothly reach the pressing stroke value, the axial spacing between the operation part and the upper end of the limiting part must be greater than or equal to the pressing stroke value.

[0026] As a preferred, the limiting part and the base are integrally formed.

[0027] As a preferred, the transmission part has an axially arranged connecting hole, the connecting hole includes an emptying section and a transmission section, the rotating shaft penetrates the transmission section and is circumferentially fixedly matched with the transmission section, and the part of the rotating shaft entering the emptying section is all empty.

[0028] The circumferential relative fixation of the rotating shaft and the transmission section means that the two are kept relatively static in the circumferential direction.

[0029] As a preference, the rotating shaft has a fixed end connected to the base and a free end away from the fixed end, the free end is located in the avoidance section, and the part of the rotating shaft that cooperates with the transmission section is closer to the fixed end than the free end.

[0030] After the rotating shaft rotates many times, it may deform, such as bending, which changes the center axis and causes the transmission section to swing, the fixed end of the rotating shaft is connected to the base, the part of the rotating shaft closer to the fixed end swings less, the part closer to the free end swings more, and the influence on the transmission section is greater, therefore, in order to reduce the influence of the swing of the rotating shaft on the transmission section and the entire operating knob, the rotating shaft and the transmission section are arranged closer to the fixed end.

[0031] As a preference, the connecting hole has a protruding rib extending from the hole wall towards the connecting hole axis, the protruding rib surrounds the transmission section, and the protruding rib and the outer wall of the rotating shaft cooperate to transmit the circumferential movement of the operating knob.

[0032] As a preference, the rotating shaft also has a radially protruding limiting boss, the upper surface of the limiting boss stops the protruding rib in the axial direction.

[0033] The protruding rib and the limiting boss cooperate in the axial direction to transmit the axial movement of the operating knob.

[0034] As a preference, the limiting boss has an outer circumferential surface clamping a resilient member between the outer circumferential surface and the hole wall of the connecting hole.

[0035] After the above structure is adopted, the resilient member is clamped between the outer circumferential surface of the limiting boss and the hole wall of the connecting hole, and the transmission section and the rotating shaft are tightly connected through interference fit, so that the axial movement is not obviously felt during operation; radially, the resilient member has a self-recovery function, and when rotating, it can alleviate the influence of the deviation and inclination of the transmission section on the operating part.

[0036] Another technical solution adopted by the present application is as follows:

[0037] A household appliance includes an operating panel, and the operating panel is provided with the knob operating assembly according to any one of the above solutions.

[0038] Preferably, the operation panel is provided with an assembly hole for mounting the rotating shaft and the limiting member, and the operation knob is located outside the operation panel, and the inner side of the operation panel is provided with a circuit board electrically connected with the base.

[0039] With the structure, the user can quickly and accurately set the required mode of the household appliance, effectively suppresses the shaking of the operation knob during use, and improves the use feeling.

[0040] The features and advantages of the present application will be described in detail in the following specific embodiments and drawings.

DRAWINGS

[0041] The application will be further described in conjunction with the drawings below:

[0042] Figure 1 The assembly cross-sectional view of the knob operation assembly in the present application is assembled on the household appliance.

[0043] Figure 2 The Figure 1 The enlarged view of A in the present application.

[0044] Figure 3 The cross-sectional view of the operation knob assembly in the present application.

[0045] Figure 4 The perspective structure schematic view of the operation knob in the present application.

[0046] Figure 5 The encoder and circuit board connection structure schematic view in the present application.

[0047] Figure legend: operation knob 1; operation part 101; knob shell 101a; knob inner frame 101b; flange 1022; hook 1011; transmission part 102; clearance segment 1021a; transmission segment 1021b; convex rib 1022; encoder 2; transmission part 102; base 201; rotating shaft 202; limiting boss 2021; fixed end 202a; free end 202b; limiting member 3; assembly part 301; through hole 3011; limiting part 302; boss 303; elastic component 4; pin 5; screw 6; gap 7; operation panel 001; assembly hole 001a; circuit board 002; boss lower end surface a; limiting boss upper surface b; limiting boss outer peripheral surface c; connecting hole hole wall d; limiting part upper end surface e.

DETAILED DESCRIPTION

[0048] The technical solutions of the embodiments of the present application are explained and described below in combination with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0051] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, or the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] Embodiment one:

[0054] AsFigures 1 to 5 As shown, the knob operation component includes:

[0055] Operation knob 1; and

[0056] Encoder 2 has a base 201 and a rotating shaft 202 connected to the base 201. An operating knob 1 drives the rotating shaft 202 to move synchronously, and the base 201 generates a corresponding electrical signal in response to the movement of the rotating shaft 202; and...

[0057] The limiting member 3, which is connected to the base 201, is used to radially limit the operation knob 1.

[0058] To address the issue of encoder knob wobbling caused by accumulated tolerances in existing technologies, this invention proposes a solution where a limiting member 3 for radially limiting the operating knob 1 is connected to the base 201 of the encoder 2. In other words, the encoder indirectly radially limits the operating knob 1 via the limiting member 3. Since the limiting member 3 is connected to the base 201 of the encoder 2, forming a component, and the fit tolerance between the limiting member 3 and the operating knob 1 is not limited by the assembly tolerances of other components (such as the assembly tolerances when the encoder 1 is assembled to the control panel of a household appliance), the fit tolerance between the limiting member 3 and the operating knob 1 can be minimized as much as possible without affecting the operation of the operating knob 1, reducing the wobbling sensation of the operating knob 1 and improving the user experience. In this embodiment, the limiting member 3 is preferably made of metal, which has low deformation, high precision, good wear resistance, and long service life.

[0059] To reduce the impact of assembly tolerances between the limiting component 3 and the base 201, the limiting component 3 and the base 201 are coaxially arranged.

[0060] To ensure better coaxiality between the rotating shaft 202 and the operating knob 1 during operation, the limiting member 3 is coaxially set with the rotating shaft 202.

[0061] like Figures 1 to 4 As shown, the operation knob 1 includes an operation part 101 and a transmission part 102 extending axially from one side of the operation part 101. The transmission part 102 is inserted into the rotating shaft 202, and the operation part 101 drives the rotating shaft 202 to move synchronously through the transmission part 102.

[0062] Operations on the operating unit 101 include rotation and pressing actions. The rotating shaft 202 rotates relative to and moves axially within the base 201 in response to the synchronous movement of the operating unit 101. By rotating the operating unit 101, the operating mode is selected. The transmission unit 102 rotates synchronously with the operating unit 101, driving the rotating shaft 202 of the encoder 2 to move synchronously within the base 201 and generate corresponding electrical signals. The transmission unit 102 rotates or slides relative to the limiting member 3. The transmission unit can be made of materials with excellent moldability and sliding properties, such as POM resin.

[0063] The operating part 101 comprises a knob shell 101a exposed outside, the knob shell 101a is internally provided with a knob inner frame 101b, and the transmission part 102 extends axially from one side of the knob inner frame 101b. The knob shell 101a is frequently touched by hands, and therefore can be made of a material with high rigidity and excellent appearance, such as metal gold-plated material.

[0064] Of course, the knob shell 101a and the transmission part 102 can also be designed as an integral molding, and the transmission part 102 extends axially directly from the knob shell 101a.

[0065] In order to realize the installation and limiting function of the limiting part 3, as shown in Figure 3 , the limiting part 3 comprises an assembly part 301 and a cylindrical limiting part 302, the assembly part 301 is connected with the base 201, and the limiting part 302 is sleeved outside the transmission part 102 to limit the transmission part 102 in the radial direction. The limiting part 302 adopts a cylindrical structure, thereby limiting the transmission part 102 in the entire circumferential direction, being symmetrical and balanced, and having a better radial limiting effect, so that the operating knob 1 keeps the same axis during use and is more smooth to operate.

[0066] The assembly part 301 of the limiting part 3 is connected with the base 201, and after assembly is completed, the limiting part 3 is fixed and cannot move. In order to have a better limiting effect on the operating knob 1, as shown in Figure 1 and Figure 3 , the part close to the operating part 101 of the transmission part 102 is limited in the radial direction by the limiting part 302. The rotating shaft of the encoder is generally made of metal material, and after a large number of rotations, deformation such as bending may occur, so that the axis of the rotating shaft changes. When the rotating shaft rotates, the rotation center does not coincide with the axis, and the rotating shaft swings, thereby driving the transmission part to swing, so that the stability of the operating knob is affected. The limiting part limits the transmission part in the radial direction to improve the swinging phenomenon. The closer the transmission part is to the position of the limiting structure, the smaller the swinging amplitude is. In the embodiment, the transmission part extends axially from one side of the operating part, and therefore the closer the limiting position is to the operating part, the more effectively the swinging of the operating part is reduced, thereby reducing the influence of the axis deviation of the rotating shaft on the entire operating knob.

[0067] In order to improve the operability of the operating knob 1, in the embodiment, the outer periphery of the part close to the operating part of the transmission part 102 is provided with a flange 1022, the limiting part 302 limits the flange 1022 in the radial direction, and the limiting part 302 and the part of the transmission part 102 away from the operating part 101 have a gap 7, so that the lower end of the transmission part 102 is in a free state, thereby reducing the contact area between the inner wall of the limiting part 302 and the outer wall of the transmission part 102 during operation, reducing the resistance, and making the movement of the transmission part 102 more flexible.

[0068] In the embodiment, the assembly part 301 and the base 201 are matched in the following way. As shown in Figure 3 , the assembly part 301 has a through hole 3011 matched with the base 201. When assembled, the base 201 is inserted into the through hole 3011 of the assembly part 301, and the outer wall of the base 201 and the inner wall of the through hole 3011 are connected by at least one of interference fit, threaded structure, keyway structure, and clamping structure. The split structure has good assembly flexibility.

[0069] Of course, the limiting part 3 and the base 201 can also be integrally formed.

[0070] In order to realize the axial limiting of the operation part 101, as shown in Figure 1 and Figure 3 , the limiting part 302 extends outwardly in the radial direction at the upper end to form a boss 303, and the operation part 101 is provided with a clamping hook 1011 clamped with the boss 303. When the operation knob 1 is pressed into the limiting part 302, the boss 303 drives the upper end of the limiting part 302 to elastically deform inwardly, and the clamping hook 1011 is clamped into the lower end surface a of the boss 303, so as to realize the axial limiting of the operation knob 1 and prevent the operation knob 1 from being pulled out. However, in the embodiment, in order to realize the rotation function of the operation knob 1, the boss 303 and the clamping hook 1011 are only relative to the axial limiting and the radial limiting, and are not fixed relative to each other, so that the operation part 101 can still rotate relative to the limiting part 302.

[0071] In the embodiment, the transmission part 102 and the rotating shaft 202 are connected in the following way. As shown in Figures 1 to 4 , the transmission part 102 has an axially arranged connecting hole, which includes an empty section 1021a and a transmission section 1021b. The rotating shaft 202 penetrates the transmission section 1021b and is matched with the transmission section 1021b in a circumferential relative fixed manner. The part of the rotating shaft 202 entering the empty section 1021a is all empty. The rotating shaft 202 and the transmission part 102 are connected in a local fixed manner, which reduces the requirements for the machining precision and the matching precision of the two parts, and is more convenient for machining and installation. Specifically, as shown in Figure 3As shown, the rotating shaft 202 has a fixed end 202a connected with the base 201 and a free end 202b away from the fixed end 202a, the free end 202b is located in the clearance section 1021a, the part of the rotating shaft 202 matched with the transmission section 1021b is closer to the fixed end 202a than the free end 202b, the fixed end 202a of the rotating shaft 202 is connected with the base 201, the part of the rotating shaft 202 closer to the fixed end 202a has a smaller swing range, the part closer to the free end 202b has a larger swing range, and the influence on the transmission part 102 is also larger, therefore, in the embodiment, in order to reduce the influence of the swing of the rotating shaft 202 on the transmission part 102 and the whole operation knob 1, the rotating shaft 202 is arranged closer to the fixed end in the matched structure of the transmission section 1021b.

[0072] In the embodiment, the transmission section 1021b connected with the hole has a specific structure, as shown in Figure 2 and Figure 3 As shown, the convex rib 1022 extends to the center of the connecting hole from the hole wall of the connecting hole, the convex rib 1022 surrounds the transmission section 1021b, the circumferential transmission of the rotating action of the operation knob 1 is realized through the matching of the convex rib 1022 and the outer wall of the rotating shaft 202, in order to enable the rotating shaft 202 to respond to the pressing action of the operation part 101, as shown in Figure 2 the rotating shaft 202 also has a radial limiting boss 2021, the upper surface b of the limiting boss 2021 is axially stopped by the convex rib 1022, the axial transmission of the pressing action of the operation knob 1 is realized through the axial stopping matching of the convex rib 1022 and the limiting boss 2021.

[0073] The boss 2021 on the upper end of the limiting part 302 and the hook 1011 on the operation part 101, the convex rib 1022 and the limiting boss 2021 have the axial limiting and axial transmission functions for the operation knob 1 and the rotating shaft 202, but they are all hard contact and collision, the connection is not tight, and the transmission precision is not high, in order to improve the transmission precision, as shown in Figure 2 the outer circumferential surface c of the limiting boss 2021 and the hole wall d of the connecting hole are clamped with the elastic component 4, after the above structure, the elastic component 4 is clamped between the outer circumferential surface c of the limiting boss and the hole wall d of the connecting hole, the interference fit enables the transmission part 102 and the rotating shaft 202 to be tightly connected, and the axial movement is not obviously felt in the hand feeling during the operation; radially, the elastic component 4 has the function of restoring by itself, and when the rotating action is performed, the influence of the deviation and inclination of the transmission part 102 on the operation part can be relieved.

[0074] When the rotating shaft 202 moves axially in the base 201, the transmission part 102 moves axially in the limiting part 302 synchronously, therefore, as shown in Figure 1 and Figure 3As shown, the axial spacing between the operating part 101 and the upper end surface e of the limiting part 302 must be present, the axial movement of the rotating shaft 202 in the base 201 has a maximum preset value, i.e. the pressing stroke value, in order to smoothly reach the pressing stroke value, the axial spacing between the operating part 101 and the upper end of the limiting part 302 must be greater than the pressing stroke value, i.e. the axial spacing must be greater than or equal to the axial displacement of the axial movement.

[0075] Embodiment two:

[0076] As shown in Figure 1 and Figure 5 The household appliance comprises an operation panel 001, and the knob operation assembly in embodiment one is installed on the operation panel 001.

[0077] Specifically, as shown in Figure 1 The operation panel 001 is provided with an assembly hole 001a for mounting the rotating shaft 202 and the limiting part 3, the operation knob 1 is located outside the operation panel 001, and the inner side of the operation panel 001 is provided with a circuit board 002 electrically connected with the base 201.

[0078] With the above structure, during assembly, as shown in Figure 5 First, the base 201 of the encoder 2 is mounted on the circuit board 002 through the pin 5, then the rotating shaft 202 of the encoder 2 is inserted into the assembly hole 001a of the operation panel 001, the circuit board 002 and the operation panel 001 are fixedly connected through the screw 6 and the like, then the limiting part 3 is mounted on the base 201 from above and is fixedly connected with the base 201 in the same axis, then the operation knob 1 is pressed from above, the transmission part 102 of the operation knob 1 is inserted between the limiting part 302 and the rotating shaft 202, the part close to the operating part 101 on the transmission part 102 is gap-fitted with the inner wall of the limiting part 302, the transmission segment 1021b of the transmission part 102 is connected with the fixed end 202a of the rotating shaft 202, and at the same time, the clamping hook 1011 on the operating part 101 is clamped with the boss 303 on the upper end of the limiting part 302, so that the knob operation assembly is assembled on the household appliance. When repairing or replacing, the above steps are performed in reverse.

[0079] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and those skilled in the art should understand that the application includes but is not limited to the contents described in the drawings and the above specific embodiment. Any modification not deviating from the functional and structural principles of the application will be included in the scope of the claims.

Claims

1. A knob operation assembly, characterized in that, include: Operation knob; as well as, An encoder has a base and a rotating shaft connected to the base, wherein an operating knob drives the rotating shaft to move synchronously, and the base generates a corresponding electrical signal in response to the movement of the rotating shaft; and... The limiting member connected to the base is used to radially limit the operation knob. The operating knob includes an operating part and a transmission part extending axially from one side of the operating part. The transmission part has an axially arranged connecting hole. The connecting hole includes a clearance section and a transmission section. The rotating shaft passes through the transmission section and is engaged with the transmission section in a circumferentially fixed manner. The portion of the rotating shaft entering the clearance section is completely clearance-free. The rotating shaft has a fixed end connected to the base and a free end away from the fixed end. The free end is located within the clearance section. The portion of the rotating shaft that engages with the transmission section is closer to the fixed end than the free end.

2. The knob operation assembly according to claim 1, characterized in that, The limiting member is coaxial with the base.

3. The knob operation assembly according to claim 1, characterized in that, The limiting member is coaxial with the rotating shaft.

4. The knob operation assembly according to claim 1, characterized in that, The transmission unit is inserted into the rotating shaft, and the operating unit drives the rotating shaft to move synchronously through the transmission unit.

5. The knob operation assembly according to claim 4, characterized in that, The limiting member includes an assembly part and a cylindrical limiting part. The assembly part is connected to the base, and the limiting part is sleeved outside the transmission part to radially limit the transmission part.

6. The knob operation assembly according to claim 5, characterized in that, The portion of the transmission unit near the operating unit is radially limited by the limiting portion.

7. The knob operation assembly according to claim 5, characterized in that, The assembly part has a through hole adapted to the base, and the assembly part and the base are connected by at least one of the following: interference fit, threaded structure, keyway structure, and snap-fit ​​structure.

8. The knob operation assembly according to claim 5, characterized in that, The upper end of the limiting part extends radially outward to form a boss, and the operating part is provided with a hook that engages with the boss.

9. The knob operation assembly according to claim 5, characterized in that, There is an axial distance between the operating part and the upper end of the limiting part. The rotating shaft can generate an axial displacement relative to the base in response to the pressing action of the operating part. The axial distance is greater than or equal to the axial displacement.

10. The knob operation assembly according to claim 1, characterized in that, The limiting component is integrally formed with the base.

11. The knob operation assembly according to claim 1, characterized in that, A rib extends from the wall of the connecting hole toward the axis of the connecting hole, and the rib forms the transmission section.

12. The knob operating assembly according to claim 11, characterized in that, The rotating shaft also has a radially protruding limiting boss, the upper surface of which stops the protruding rib in the axial direction.

13. The knob operating assembly according to claim 12, characterized in that, An elastic component is held between the outer peripheral surface of the limiting boss and the wall of the connecting hole.

14. A household appliance, including an operation panel, characterized in that, The control panel is equipped with a rotary control assembly as described in any one of claims 1 to 13.

15. The household appliance according to claim 14, characterized in that, The operation panel is provided with mounting holes for mounting the rotating shaft and the limiting component. The operation knob is located on the outside of the operation panel, and the inner side of the operation panel is provided with a circuit board that is electrically connected to the base.

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