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Rotating sliding sleeve

A technology of a rotary shaft and a rotary part, which is applied to the electric recording process applying the charge pattern, the equipment and instruments of the electric recording process applying the charge pattern, etc. Smooth rotation, low cost effect

Inactive Publication Date: 2005-10-12
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If it is desired to reduce the wall thickness of the metal tube, secondary processing is required, and the processing cost is high. If the shaft diameter is thick, the driving load will increase, and the device itself that uses the resin shaft will increase in size.

Method used

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  • Rotating sliding sleeve
  • Rotating sliding sleeve
  • Rotating sliding sleeve

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0068] In the example shown in FIG. 1, an axially long protrusion 6b1 is formed on the side of the shaft portion 6b, and an axially long concave portion 20a is formed on the sleeve 20, and they cooperate with each other to realize the anti-rotation function.

[0069] This example is contrary to the example shown in FIG. 1. As shown in FIGS. 2A and 2B, a protrusion 40 with a radius r=0.3 to 0.5 mm is formed toward the inner side of the sleeve 20' as a sleeve-side anti-rotation portion, and on the circumference of the shaft portion 6b' An annular groove 41 is formed in the direction, and a flat portion 42 is formed in a part of the groove 41 to constitute a shaft side anti-rotation portion.

[0070] The cover 20' is made the same as the cover 20 in the above-mentioned embodiment except for the above-mentioned protrusion 40, and the abutting part of both ends of the bent circular metal plate includes a convex part 20c' and a concave part 20e' bent relative to the axial direction. ...

example 2

[0073] This example is a modified example of the above-mentioned example 1. As shown in FIGS. 3A and 3B, a protruding portion 50 with a height h=0.3~0.5mm is formed on the inner side of the sleeve 20 "to be used as a sleeve side anti-rotation part. A groove 51 including a flat portion 52 is formed in the shaft portion 6b″, and constitutes a shaft portion side anti-rotation portion.

[0074] The cover 20" is made the same as the cover 20 in the above-mentioned embodiment except for the above-mentioned protrusion 50, and the two ends of the metal plate bent into a circle include a convex part 20c" and a concave part 20e" bent relative to the axial direction.

[0075] In this example, when the sleeve 20 ″ is pressed onto the shaft portion 6 b ″, the protrusion 50 elastically deforms into the groove 51 , and the protrusion 50 contacts the flat portion 52 . In this way, through the cooperative relationship between the protrusion 50 and the groove 51, the position in the longitudina...

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PUM

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Abstract

The present invention relates to a rotating sliding sleeve, a revolution axis containing the sleeve, a developing device using the revolution axis and an image forming device using the developing device. The collar 20 for rotational slide to be mounted rigidly at a shank part 6b made of resin is configured so that the end joining part of a metal plate bent in circular form is curved with respect to the axial direction owing to engagement of a projection 20c with a recess 20e, and the shank part 6b using the collar 20 is used in the developing device, and the image forming device is formed. So provided is a simple, low-cost collar for the device without bringing about increase of the drive load or large-size construction of the device itself which uses a resin shaft.

Description

technical field [0001] The present invention relates to a rotary slide cover for protecting a resin rotary shaft, a rotary shaft protected by the rotary slide cover, a developing device using the rotary shaft, and an image forming apparatus using the same. Background technique [0002] Conventionally, in an image forming apparatus, an electrostatic latent image is formed on an image carrier, the electrostatic latent image is made visible by a developing device using a developer, and the visible image is transferred onto a sheet medium for recording. image. [0003] In the above-described developing device, a conveying screw is used as means for agitating and conveying the developer. In order to reduce the weight and reduce the operating load, in recent years, the conveying screw has been manufactured by integrally molding resin. [0004] The conveyor auger includes a rotary shaft portion that is supported to rotate on a bearing provided on a stationary member. The rotatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C35/02G03G15/08
CPCG03G15/0822Y10T29/49947
Inventor 中原知利西冈桂志伊藤寿幸
Owner RICOH KK