Knob operation assembly and household appliance

Abstract

The invention discloses a knob operation assembly and a household electrical appliance, and belongs to the technical field of household electrical appliances. The knob operation assembly comprises an operation rotary knob; an encoder which is provided with a base and a rotating shaft connected to the base, wherein the rotating shaft is driven by the operation knob to synchronously act, and the base responds to the action of the rotating shaft to generate a corresponding electrical signal; a limiting member which is connected with the base and used for radially limiting the operation knob, wherein the encoder indirectly and radially limits the operation knob through the limiting member, the limiting member is connected to the base of the encoder to form an assembly, and the limiting member and the base can keep good coaxiality; moreover, the fit tolerance between the limiting piece and the operation knob is not limited by the assembly tolerance of other parts, so the fit tolerance between the limiting piece and the operation knob can be reduced as much as possible on the premise of not influencing the action of the operation knob, the shaking feeling of the operation knob is reduced, and the operation experience is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of household appliances, in particular to a knob operation assembly and household appliances. 【Background technique】 [0002] With the improvement of living standards, people's pursuit of household appliances is getting higher and higher, hoping to quickly and accurately set the mode they need. The operation of many household appliances is realized through knob operation components, but the existing knob operation components Due to component processing errors and assembly methods, there is a problem of large shaking. [0003] In order to improve the above deficiencies, an operating assembly is disclosed in the utility model patent document of the authorized announcement number CN207987546U, which is called the operating assembly and the laundry treatment device equipped with the operating assembly, which includes an operating knob, a peripheral wall unit, a substrate supporting member, The encoder, the wi...

AI Technical Summary

Problems solved by technology

[0004] However, this utility model does not effectively solve the shaking of the matching part of the knob structure, and there is still a large shaking when the user operates the knob operation assembly. Large, mainly caused by two factors: 1. In this patent, through the radial limit operation knob of the peripheral wall unit, in actual assembly, it is difficult to achieve a perfect zero-distance fit between the two parts, and there are assembly tolerances. In this patent, The first assembly tolerance needs to be reserved when the encoder is matched with the back hole of the substrate support member, and the second assembly tolerance needs to be reserved when the inner peripheral surface of the peripheral wall unit is matched with the cylindrical part of the action shaft unit. Therefore, after actual assembly, if you want to realize the If the coaxiality between the unit and the encoder is matched, the limit gap between the peripheral wall unit and the cylindrical part of the action shaft unit must be enlarged, which is actually the accumulation of the first assembly tolerance and the second assembly tolerance

2. The action shaft of the operating knob is fully wrapped with the encoder rod. There is a tolerance deviation between the encoder rod and the encoder base in the axial direction. When the operating knob is assembled on the encoder rod, due to the wrapped The fixed way causes the concentricity of the operating knob relative to the encoder to be greatly affected by the tolerance of the rod part, which leads to a further increase in the design gap when designing the limit gap between the peripheral wall unit and the cylindrical part of the action shaft unit, considering the influence of this factor. As a result, the knob operation component shakes a lot during use, and the all-enveloping fit is not easy to install

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