# US 12,600,051 B2 · Razor assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,600,051 B2 - Document ID: US12600051B2 - Status: Granted - Kind: B2 - Application number: 18/356,575 - Filed: 2023-07-21 - Published: 2024-01-25 - Granted: 2026-04-14 - Earliest claimed: 2022-07-25 - Assignees: Dorco Co., Ltd. - Applicants: Dorco Co., Ltd. - Inventors: Sung Jin Park; Ji Hun Ki; Kyong Sik Lee - Web page: https://patentgrep.com/patent/US12600051B2 ## CPC - B26B 21/521: {Connection details, e.g. connection to razor heads} - B26B 21/225: {the changeable unit being resiliently mounted on the handle} - B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H) ## Abstract A razor assembly is proposed. The razor assembly may include a razor cartridge including at least one razor blade, and a razor handle pivotably coupled to the razor cartridge. The razor cartridge may include a blade housing accommodating the razor blade so that at least a portion of a cutting edge of the at least one razor blade is exposed toward a front side and a handle coupling part provided on one side of the blade housing and pivotably coupled to the razor handle. The handle coupling part may include a separation preventing protrusion protruding to prevent the razor handle from being separated from the handle coupling part. The razor handle may include a connecting arm that moves along one surface of the handle coupling part. ## Claims ### Claim 1 A razor assembly comprising: a razor cartridge including at least one razor blade; and a razor handle pivotably coupled to the razor cartridge, wherein the razor cartridge comprises: a blade housing accommodating the razor blade, the blade housing comprises a first side and a second side opposite to the first side; and a handle coupling part provided on the second side of the blade housing and pivotably coupled to the razor handle, wherein the handle coupling part comprises a separation preventing protrusion protruding to prevent the razor handle from being separated from the handle coupling part, wherein the razor handle includes a connecting arm configured to move along one surface of the handle coupling part, wherein the connecting arm is configured to position the separation preventing protrusion inside of an inner wall of the connecting arm in response to the connecting arm moving along the one surface of the handle coupling part, wherein the connecting arm includes an accommodating groove recessed from the inner wall to receive the separation preventing protrusion in response to the connecting arm being coupled to the handle coupling part, wherein the handle coupling part further comprises a lateral support part that is spaced apart from the separation preventing protrusion and protrudes from the second side of the blade housing, and wherein the connecting arm is positioned between the lateral support part and the separation preventing protrusion. ### Claim 2 (depends on 1) The razor assembly of claim 1, wherein: the razor handle is pivotably coupled to the razor cartridge between a neutral position and a pivot limit position, and in response to the razor handle being in the neutral position, at least a portion of the separation preventing protrusion is positioned not to be aligned with the accommodating groove. ### Claim 3 (depends on 1) The razor assembly of claim 1, wherein: the razor handle is pivotably coupled to the razor cartridge between a neutral position and a pivot limit position, and in response to the razor handle being in the pivot limit position or between the neutral position and the pivot limit position, the separation preventing protrusion and the accommodating groove are aligned with each other. ### Claim 4 (depends on 1) The razor assembly of claim 1, wherein the connecting arm is configured to move along the one surface of the handle coupling part in a state where a first side of the connecting arm is supported by the separation preventing protrusion and a second side of the connecting arm is supported by the lateral support part. ### Claim 5 (depends on 1) The razor assembly of claim 1, wherein the lateral support part further comprises a hook support part configured to support the connecting arm toward the first side of the blade housing so that the connecting arm is prevented from being separated rearward of the razor cartridge. ### Claim 6 (depends on 1) The razor assembly of claim 1, wherein: the separation preventing protrusion is disposed eccentrically from a central portion of the razor cartridge and the accommodating groove is disposed eccentrically from a central portion of the connecting arm so as to prevent the razor cartridge from being reversely coupled to the razor handle. ### Claim 7 (depends on 1) The razor assembly of claim 1, wherein the accommodating groove is formed at a periphery of the inner wall of the connecting arm. ### Claim 8 (depends on 1) The razor assembly of claim 1, wherein the separation preventing protrusion has an asymmetrical shape with respect to a direction in which the razor handle is coupled to the razor cartridge so as to prevent the razor cartridge from being reversely coupled to the razor handle. ### Claim 9 (depends on 1) The razor assembly of claim 1, wherein the separation preventing protrusion comprises: a first inclined surface protruding from a first location of the handle coupling part and having a predetermined angle relative to the first location of the handle coupling part; and a second inclined surface protruding from a second location of the handle coupling part and inclined in a direction toward the first inclined surface. ### Claim 10 (depends on 9) The razor assembly of claim 9, wherein a length of the second inclined surface is longer than a length of the first inclined surface. ### Claim 11 (depends on 1) The razor assembly of claim 1, wherein the accommodating groove is recessed from the inner wall of the connecting arm, so that a space accommodating the separation preventing protrusion has a shape corresponding to a shape of the separation preventing protrusion. ### Claim 12 (depends on 1) The razor assembly of claim 1, wherein the razor handle further comprises: a return force providing unit comprising an elastic material to elastically support the blade housing in a state in which the razor handle is coupled to the handle coupling part. ### Claim 13 A razor assembly comprising: a razor cartridge including at least one razor blade; and a razor handle pivotably coupled to the razor cartridge, wherein the razor cartridge comprises: a blade housing accommodating the razor blade; and a handle coupling part provided on one side of the blade housing and pivotably coupled to the razor handle, wherein the handle coupling part comprises a separation preventing protrusion protruding to prevent the razor handle from being separated from the handle coupling part, wherein the razor handle includes a connecting arm configured to move along one surface of the handle coupling part, wherein the connecting arm is configured to position the separation preventing protrusion inside of an inner wall of the connecting arm in response to the connecting arm moving along the one surface of the handle coupling part, wherein the connecting arm includes an accommodating groove recessed from the inner wall to receive the separation preventing protrusion in response to the connecting arm being coupled to the handle coupling part, wherein the handle coupling part further comprises an arc-shaped support configured to guide a pivoting motion of the razor handle, the arc-shaped support comprises the one surface, and wherein the connecting arm is configured to slide along the one surface of the arc-shaped support. ### Claim 14 (depends on 13) The razor assembly of claim 13, wherein: the separation preventing protrusion protrudes from the arc-shaped support, and the inner wall of the connecting arm is configured to accommodate the separation preventing protrusion in response to the connecting arm sliding along the one surface of the arc-shaped support. ### Claim 15 (depends on 13) The razor assembly of claim 13, wherein the separation preventing protrusion is spaced apart from a most protruding point of the arc-shaped support. ### Claim 16 A razor assembly comprising: a razor cartridge including at least one razor blade; and a razor handle pivotably coupled to the razor cartridge, wherein the razor cartridge comprises: a blade housing accommodating the razor blade; and a handle coupling part provided on one side of the blade housing and pivotably coupled to the razor handle, wherein the handle coupling part comprises a separation preventing protrusion protruding to prevent the razor handle from being separated from the handle coupling part, wherein the razor handle includes a connecting arm configured to move along one surface of the handle coupling part, wherein the connecting arm is configured to position the separation preventing protrusion inside of an inner wall of the connecting arm in response to the connecting arm moving along the one surface of the handle coupling part, wherein the connecting arm includes an accommodating groove recessed from the inner wall to receive the separation preventing protrusion in response to the connecting arm being coupled to the handle coupling part, wherein the separation preventing protrusion comprises: a first inclined surface protruding from a first location of the handle coupling part and having a predetermined angle relative to the first location of the handle coupling part; and a second inclined surface protruding from a second location of the handle coupling part and inclined in a direction toward the first inclined surface, and wherein a width between the first inclined surface and the second inclined surface decreases as it goes in a protruding direction of the separation preventing protrusion.