# US 10,865,061 B2 · Driving force transmission mechanism and image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,061 B2 - Document ID: US10865061B2 - Status: Granted - Kind: B2 - Application number: 16/241,546 - Filed: 2019-01-07 - Published: 2019-07-11 - Granted: 2020-12-15 - Earliest claimed: 2018-01-10 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Masaki Amemiya; Norio Tomita - Web page: https://patentgrep.com/patent/US10865061B2 ## CPC - B65H 3/0669: {Driving devices therefor} - B41J 23/02: Mechanical power drives - F16D 7/048: {with parts moving radially between engagement and disengagement (F16D7/10 takes precedence)} - F16D 13/08: with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band (F16D13/02 takes precedence; {similar slip couplings F16D7/022; similar clutches electromagnetically actuated F16D27/025, F16D27/105} ; similar free-wheel clutches F16D41/20; similar brakes F16D49/02) - G03G 15/6511: {Feeding devices for picking up or separation of copy sheets} - G03G 21/1647: {Mechanical connection means} - H02K 7/108: with friction clutches - B65H 2403/72: Clutches, brakes, e.g. one-way clutch +F204 - G03G 15/2053: {Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating} - G03G 15/6529: {Transporting (G03G15/6555 takes precedence)} - G03G 2221/1657: transmitting mechanical drive power - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A driving force transmission mechanism includes a first transmission member and a second transmission member that are arranged on an identical rotational center axis. The first transmission member includes one or more transmission claws engaged with the second transmission member. The transmission claw includes, at a position away from the rotational center axis, a fixing portion with respect to the first transmission member, and extends in a direction crossing a direction directed from the fixing portion to the rotational center axis. The second transmission member includes one or more stoppers engaged with a tip end of the transmission claw and one or more holding portions engaged with a side of the transmission claw, which faces the rotational center axis. ## Claims ### Claim 1 A driving force transmission mechanism that transmits a driving force in one direction, the driving force transmission mechanism comprising a first transmission member and a second transmission member that are arranged on an identical rotational center axis, wherein the first transmission member includes a transmission claw engaged with the second transmission member, the transmission claw includes, at a position away from the rotational center axis, a fixing portion of the first transmission member, and extends in a direction crossing a direction directed from the fixing portion to the rotational center axis, and the second transmission member includes a stopper engaged with a tip end of the transmission claw and one or more holding portions engaged with a side of the transmission claw, which faces the rotational center axis, wherein the holding portion includes a holding groove that is recessed from a position where the holding portion is engaged with the transmission claw to a side of the rotational center axis. ### Claim 2 (depends on 1) The driving force transmission mechanism according to claim 1, wherein the side of the transmission claw, which faces the rotational center axis, is formed planarly, and the holding portion is formed planarly. ### Claim 3 (depends on 1) The driving force transmission mechanism according to claim 1, wherein a locking projection that locks a side of the tip end of the transmission claw, which is opposite to the rotational center axis, is provided at an end of the stopper. ### Claim 4 (depends on 3) The driving force transmission mechanism according to claim 3, wherein the transmission claw includes a claw inclined portion that is provided on a side facing the locking projection and is inclined so that a thickness decreases toward an end, and the locking projection includes an inclined portion that is inclined so as to be engaged with the claw inclined portion. ### Claim 5 (depends on 1) The driving force transmission mechanism according to claim 1, wherein the holding groove holds lubricant. ### Claim 6 (depends on 1) The driving force transmission mechanism according to claim 1, wherein the first transmission member includes a plurality of transmission claws that are arranged in parallel with the rotational center axis therebetween, and the second transmission member includes a plurality of holding portions that are arranged in parallel with the rotational center axis therebetween and a plurality of stoppers that are arranged in parallel with the rotational center axis therebetween. ### Claim 7 (depends on 1) An image forming apparatus comprising the driving force transmission mechanism according to claim 1.