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Rotation clutch device and paper advance apparatus made by the device

A clutch device and rotary technology, which is applied in the field of rotary clutch devices and paper feeders, can solve the problem that the click and impact sound cannot be eliminated.

Inactive Publication Date: 2004-05-19
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the engaging claw of the engaging lever engages the engaging shoulder of the cam body (the latter facing the drive gear at the toothless portion of the partially toothless gear so that the mesh between the partially toothless gear and the driving gear is released After being subjected to the initial rotation force of the thrust spring), the clicking sound generated by the thrust spring cannot be eliminated

Method used

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  • Rotation clutch device and paper advance apparatus made by the device
  • Rotation clutch device and paper advance apparatus made by the device
  • Rotation clutch device and paper advance apparatus made by the device

Examples

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Embodiment Construction

[0024] Embodiments of the present invention will be described below. figure 1 is a schematic sectional view of a laser printer as an image forming apparatus according to an embodiment of the present invention. figure 2 is a front view of a single rotary clutch unit for the hopper. image 3 is a front view of a single-rotary clutch in the immediately disengaged state.

[0025] Such as figure 1 As shown, near the bottom of the synthetic resin main case 2 of the laser printer 1 is provided a partition wall 2a which is integral with the main case 2 but divides the main case 2 into two vertically. The control boards 14, 15 and 16 are disposed under the partition wall 2a, and their lower sides are covered with a bottom cover 50 composed of a sheet metal or the like. A paper feeding section 4 that feeds paper (cut paper) 3 as a recording medium is provided under the bottom cover body 50 . A processing unit 18 as an image forming means for forming an image on a supplied sheet, a ...

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PUM

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Abstract

A rotary clutch device includes: a tooth-partially-lacking gear that can mesh with a drive gear and is given initial rotation force; a rotatable cam body that is concentric with the tooth-partially-lacking gear, having an engagement step; and an elastic body. An engagement lever is engaged with and disengaged from the engagement step according to an intermittent operation of an actuator so that the tooth-partially-lacking gear starts and stops to rotate. Rotation force of the tooth-partially-lacking gear is transmitted to the cam body via the elastic body.

Description

technical field [0001] The present invention relates to a rotary clutch device and a paper feeder made of the device. The present invention also relates to an image forming apparatus such as a laser printer, copier or facsimile machine. Background technique [0002] As we all know, in the rotary clutch device equipped in the paper feeder of the laser printer, there is a cam body with an engaging shoulder on its outer peripheral surface and a part of the toothless gear connected to the D-shaped paper feed roller to form a whole. For engaging and releasing the snap shoulder, a snap lever is provided. When the engagement between the partially toothless gear and the drive gear is released, the engaging lever engages the engaging shoulder so that the partially toothless gear and the paper feed roller stop. (eg JP-A-11-190410) [0003] The engaging lever is intermittently actuated by an actuator such as a solenoid at a prescribed timing. A thrust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H3/06F16H21/10F16H27/08
CPCB65H3/0669B65H2403/72B65H2403/421
Inventor 中野宏
Owner BROTHER KOGYO KK