# US 2017/0284522 A1 · Deformation motion mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284522 A1 - Document ID: US20170284522A1 - Status: Published application - Kind: A1 - Application number: 15/089,866 - Filed: 2016-04-04 - Published: 2017-10-05 - Earliest claimed: 2016-04-04 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Minoru KUROSE; Yoshihiko KATSUYAMA; Kazuo HAMADA; Takuro KOBAYASHI; Naoto TANIMICHI; Tsui HAPPY - Web page: https://patentgrep.com/patent/US20170284522A1 ## CPC - F16H 25/20: Screw mechanisms (with automatic reversal F16H25/12) - B25J 7/00: Micromanipulators {(specimen supports for investigating or analysing materials G01N23/2204; associated with microscopes G02B21/32; means for supporting or positioning the objects or the material in discharge tubes H01J37/20)} - F16H 37/122: {for interconverting rotary motion and oscillating motion} - F16H 19/001: {for conveying reciprocating or limited rotary motion} - F16H 2025/2059: {Common movement by two screws or two nuts, e.g. two connected screws with opposite thread direction} - F16H: GEARING - B25J: MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ({manipulators specially adapted for use in surgery A61B34/70; manipulators used in cleaning hollow articles B08B9/04}; manipulators associated with rolling mills B21B39/20; manipulators associated with forging machines B21J13/10; {manipulators associated with picking-up and placing mechanisms B23P19/007}; means for holding wheels or parts thereof B60B30/00; {vehicles with ground-engaging propulsion means, e.g. walking members B62D57/02, B62D57/032; devices for picking-up and depositing articles or materials between conveyors B65G47/90, B65G47/91; manipulators with gripping or holding means for transferring packages B65H67/065}; cranes B66C; {manipulators used in the protection or supervision of pipe-line installations F17D5/00; walking equipment adapted for nuclear steam-generators F22B37/006}; manipulators specially adapted for, or associated with, nuclear reactors G21C; {apparatus used for handling wafers during manufacture or treatment of semiconductor H10P72/50}) ## Abstract A novel deformation motion mechanism with precise motion precise motion and structural robustness is achieved. A deformation motion mechanism includes: an elastic ring member shaped symmetrically with respect to a center line, wherein one end of the elastic ring member is fixed and the other end is movable along the center line; a drive unit which is placed within the elastic ring member and is arranged to rotate a feed screw engaged with both ends of the elastic ring member along an operating line orthogonal to the center line, to press or stretch the elastic ring member along the center line; and a plurality of flexible arms which connects the drive unit to the elastic member in at least a direction of the center line. ## Claims ### Claim 1 A deformation motion mechanism comprising: an elastic ring member shaped symmetrically with respect to a center line, wherein one end of the elastic ring member is fixed and the other end is movable along the center line; a drive unit which is placed within the elastic ring member and is arranged to rotate a feed screw engaged with both ends of the elastic ring member along an operating line orthogonal to the center line, to press or stretch the elastic ring member along the center line; and a plurality of flexible arms which connects the drive unit to the elastic member in at least a direction of the center line. ### Claim 2 (depends on 1) The deformation motion mechanism according to claim 1, wherein the plurality of flexible arms are arranged symmetrically about a point at which the center line and the operating line intersect. ### Claim 3 (depends on 1) The deformation motion mechanism according to claim 1, wherein each of the plurality of flexible arms is flexible in the direction of the center line but rigid in a direction orthogonal to a ring plane of the elastic ring member. ### Claim 4 (depends on 1) The deformation motion mechanism according to claim 1, wherein each of the plurality of flexible arms is formed from an elastic plate of a predetermined width, wherein the flexible arm is installed such that a width direction of the elastic plate is the same as a direction orthogonal to a ring plane of the elastic ring member. ### Claim 5 A deformation motion method comprising: preparing an elastic ring member shaped symmetrically with respect to a center line, wherein one end of the elastic ring member is fixed and the other end is movable along the center line wherein a drive unit is placed within the elastic ring member and is arranged to rotate a feed screw engaged with both ends of the elastic member along an operating line orthogonal to the center line; connecting the drive unit to the elastic ring member through a plurality of flexible arms in at least a direction of the center line; and by the drive unit, rotating the feed screw to press or stretch the elastic ring member along the operating line. ### Claim 6 (depends on 5) The deformation motion method according to claim 5, wherein the plurality of flexible arms are arranged symmetrically about a point at which the center line and the operating line intersect. ### Claim 7 (depends on 5) The deformation motion method according to claim 5, wherein each of the plurality of flexible arms is flexible in the direction of the center line but rigid in a direction orthogonal to a ring plane of the elastic ring member. ### Claim 8 (depends on 5) The deformation motion method according to claim 5, wherein each of the plurality of flexible arms is formed from an elastic plate of a predetermined width, wherein the flexible arm is installed such that a width direction of the elastic plate is the same as a direction orthogonal to a ring plane of the elastic ring member.