A car encoder knob

Abstract

The invention provides a vehicle-mounted encoder knob, including a shaft handle of an encoder and a shaft sleeve nested on the shaft handle. A side wall of the shaft handle is provided with a transverse cutting groove and at least one longitudinal guide rail; the shaft sleeve includes a knob cover and a knob core, the knob core is provided with a sleeve connected with the shaft handle in a clamping manner, the upper part of the sleeve is provided with at least one gap stretching upwards, the sleeve is separated by the gap to form at least one sleeving section, an inner wall of the sleeving section is provided with a buckle matched with the transverse cutting groove of the shaft handle, and the lower part of the sleeve is provided with at least one guiding piece mounted opposite to the longitudinal guide rail of the shaft handle. Through the arrangement of the transverse cutting groove and longitudinal guide rail on the shaft handle of the encoder and arrangement of the buckle and the guiding piece matched with the transverse cutting groove and the longitudinal guide rail on the shaft sleeve nested on the shaft handle, easy installation of the vehicle-mounted encoder knob is realized, and manpower and material resources for installation of the encoder shaft sleeve are greatly saved.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted knobs, in particular to a vehicle-mounted encoder knob. Background technique [0002] After the durability test of the encoder knob of the car audio, the pull-out force is required to be 40-60N. Such as figure 1 As shown, it is an existing encoder, and the existing encoder shaft is tooth-shaped or D-shaped. Such as figure 2 As shown, it is the existing shaft sleeve that cooperates with the shaft shaft of the encoder, and the cooperation between the shaft shaft and the shaft sleeve is an interference fit. Since the pull-out force of the knob bushing will decrease after the durability test, it is necessary to ensure that the pull-out force of the knob bushing is 80-100N during the design process. Since the push-in force of the knob bushing is about 20N greater than the pull-out force, to ensure that the pull-out force of the knob bushing is 80-100N, the push-in force of the knob bushing...

AI Technical Summary

Problems solved by technology

If the preload of the knob sleeve deviates, the knob may be crushed

Moreover, the tooling is pressed in place by the stroke control knob of the indenter, and the force acting on the shaft handle of the encoder will increase by about 20N to ensure that the knob sleeve is pressed in place. Due to the existence of manufacturing deviation, the shaft of some knobs The press-in force of the sleeve will be greater than 150N, while the maximum axial pressure allowed by the encoder shaft is less than 150N. Therefore, the existing technical solution not only consumes manpower and material resources, but also has the risk of crushing the encoder.

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