Coil spring unit, driving force transmitting device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorShota Kase
Life of this patent
Estimating the term…
Abstract
A coil spring unit includes a coil spring; and a metal plate supporting the coil spring, the metal plate including a plurality of supporting portions cooperative with each other to support the coil spring, wherein the supporting portions are provided by bending the metal plate at bending lines and have supporting surfaces substantially perpendicular to the bending lines, respectively, and wherein the supporting surfaces are substantially parallel with outside tangential lines of the coil spring and support the coil spring.
Claims21
A coil spring unit comprising:
- a coil spring;
- and
- a metal plate supporting said coil spring, said metal plate including a plurality of supporting portions cooperative with each other to support said coil spring,
- wherein said supporting portions are provided by bending said metal plate at bending lines and have supporting surfaces substantially perpendicular to the bending lines, respectively, and
- wherein said supporting surfaces are substantially parallel with outside tangential lines of said coil spring and support said coil spring.
A coil spring unit comprising:
- a coil spring;
- and
- a metal plate supporting said coil spring, said metal plate including a plurality of supporting portions cooperative with each other to support said coil spring,
- wherein said supporting portions are provided by bending said metal plate, and
- wherein each of said supporting portions has a surface substantially perpendicular to a tangent line of an outer periphery of said coil spring, the surface being provided by a flat surface portion of said metal plate before the bending.
A coil spring unit comprising:
- a coil spring;
- and
- a metal plate supporting said coil spring, said metal plate including a plurality of supporting portions cooperative with each other to support said coil spring,
- wherein said supporting portions includes portions projected from a flat surface portion of said metal plate, and
- wherein a flat surface portion of each of said projected portions is substantially perpendicular to a tangent line of an outer periphery of said coil spring.
A coil spring unit comprising:
- a coil spring;
- and
- a metal plate including a plurality of supporting portions which support said coil spring,
- wherein each of said supporting portions is formed by a bending process in which a punched portion of said metal plate is bent along a bending line, the punched portion of said metal plate being formed by a punching process resulting in at least one cut surface of the punched portion, and
- wherein each of said supporting portions are oriented in a direction such that the bending line extends in a radial direction of said coil spring and said coil spring is supported by a plurality of the cut surfaces resulting from said punching process on each of said supporting portions.
Dependencies are inferred from the claim text.