# US 10,478,961 B2 · Hand-held power tool with a switching unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,961 B2 - Document ID: US10478961B2 - Status: Granted - Kind: B2 - Application number: 15/598,983 - Filed: 2017-05-18 - Published: 2017-12-07 - Granted: 2019-11-19 - Earliest claimed: 2016-06-02 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Daniel Barth; Cornelius Boeck; Sinisa Andrasic - Web page: https://patentgrep.com/patent/US10478961B2 ## CPC - B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} - B24B 23/02: with rotating grinding tools; Accessories therefor - B24B 23/028: {Angle tools} - H01H 3/20: wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling - H01H 3/14: adapted for operation by a part of the human body other than the hand, e.g. by foot - H01H 9/06: Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract A hand-held power tool, in particular an angle-grinding machine, includes a housing, a switching unit, a motor, and at least one first pivot unit and one second pivot unit. The switching unit includes a ratchet element arranged on the housing. The first and second pivot units are configured to mount the ratchet element on the housing so as to be movable. Each of the first and the second pivot units includes at least one housing-side bearing unit and one ratchet-side bearing unit. The hand-held power tool further includes a coupling unit configured to couple the first pivot unit with the one second pivot unit. ## Claims ### Claim 1 A hand-held power tool, comprising: a housing; a switching unit including a ratchet element arranged on the housing; a motor; at least one first pivot unit and one second pivot unit, the first and second pivot units configured to mount the ratchet element on the housing of the hand-held power tool so as to be movable; and a coupling unit configured to couple the first pivot unit with the second pivot unit, wherein each of the first and the second pivot units includes at least one housing-side bearing unit and one ratchet-side bearing unit. ### Claim 2 (depends on 1) The hand-held power tool according to claim 1, wherein: each of the first and the second pivot units includes a first arm configured to connect the housing-side bearing unit to the ratchet-side bearing unit, and the first arm of the first pivot unit and the first arm of the second pivot unit are configured such that first arm of the first pivot unit is always moved parallel to the first arm of the second pivot unit. ### Claim 3 (depends on 1) The hand-held power tool according to claim 1, wherein: each of the first and the second pivot units includes one second arm configured to connect the housing-side bearing unit to a further bearing unit, and the further bearing unit is configured to mount the coupling unit on the first and the second pivot units. ### Claim 4 (depends on 1) The hand-held power tool according to claim 1, wherein: an axial extent of the coupling unit corresponds to a distance between the housing-side bearing unit of the first pivot unit and the housing-side bearing unit of the second pivot unit. ### Claim 5 (depends on 1) The hand-held power tool according to claim 1, wherein: the coupling unit is one of: a rod element, a plastics material part, and a sheet metal bending part. ### Claim 6 (depends on 1) The hand-held power tool according to claim 1, wherein: the first and the second pivot units are rotatably mounted such that rotational movement of the first pivot unit follows rotational movement of the second pivot unit. ### Claim 7 (depends on 1) The hand-held power tool according to claim 1, wherein: at least one of the housing-side bearing units and/or at least one of the ratchet-side bearing unit of the first pivot unit and/or the second pivot unit includes a linear guide. ### Claim 8 (depends on 1) The hand-held power tool according to claim 1, wherein: the first pivot unit is spaced from the second pivot unit by at least a length of 25% of an axial extent of the ratchet element. ### Claim 9 (depends on 1) The hand-held power tool according to claim 1, wherein: in at least one state of the hand-held power tool, a switching element of the switching unit is actuated in a translatory manner by the ratchet element. ### Claim 10 (depends on 1) The hand-held power tool according to claim 1, wherein: the coupling unit includes a toothed wheel element. ### Claim 11 (depends on 10) The hand-held power tool according to claim 10, wherein: an angle between the first arm of the first pivot unit and a radial axis of the hand-held power tool is configured to be set to a value of between 60° and 120°. ### Claim 12 (depends on 11) The hand-held power tool according to claim 11, wherein: the value is between 70° and 110°. ### Claim 13 (depends on 1) The hand-held power tool according to claim 1, wherein: the coupling unit is a scissors lifting unit. ### Claim 14 (depends on 13) The hand-held power tool according to claim 13, wherein: an angle between the first arm of the first pivot unit and an axial axis of the hand-held power tool is configured to be set to a value of between 0° and 30°. ### Claim 15 (depends on 14) The hand-held power tool according to claim 14, wherein: the value is between 0° and 20°. ### Claim 16 (depends on 1) The hand-held power tool according to claim 1, further comprising: a resetting element configured to provide a resetting force in opposition to an actuating direction of the ratchet element, wherein the resetting element is arranged on at least one of the first pivot unit and the second pivot unit. ### Claim 17 (depends on 16) The hand-held power tool according to claim 16, wherein: the first and the second pivot units form one structural unit with the coupling unit and with the resetting element. ### Claim 18 (depends on 16) The hand-held power tool according to claim 16, wherein: the resetting element is a leg spring. ### Claim 19 (depends on 1) The hand-held power tool according to claim 1, wherein: the first and the second pivot units are rotatably mounted such that rotational movement of the first pivot is effected in an opposite direction as rotational movement of the second pivot unit. ### Claim 20 (depends on 1) The hand-held power tool according to claim 1, wherein: in at least one state of the hand-held power tool, a switching element of the switching unit is actuated in a rotational manner by at least one of the first pivot unit and the second pivot unit.