# US 12,006,743 B2 · Door lock, in particular motor vehicle door lock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,743 B2 - Document ID: US12006743B2 - Status: Granted - Kind: B2 - Application number: 17/438,974 - Filed: 2020-03-06 - Published: 2022-04-28 - Granted: 2024-06-11 - Earliest claimed: 2019-03-21 - Assignees: Kiekert AG - Applicants: Kiekert AG - Inventors: Ömer Inan; Holger Schiffer; Michael Scholz; Peter Szegeny; Thomas Schönenberg - Web page: https://patentgrep.com/patent/US12006743B2 ## CPC - E05B 85/20: Bolts or detents - E05B 85/26: Cooperation between bolts and detents - E05B 77/02: for accident situations - E05B 79/08: Mounting of individual lock elements in the lock, e.g. levers - E05B 85/24: Bolts rotating about an axis - E05B 85/243: {with a bifurcated bolt} - F16C 11/04: Pivotal connections (hinges for doors, windows or wings E05D) - E05B 77/36: Noise prevention; Anti-rattling means - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A door lock, in particular a motor vehicle door lock, which is equipped with a locking mechanism that substantially consists of a rotary latch and at least one pawl. Each of the two locking mechanism parts is rotatably supported on a base about a respective axis. For this purpose, a bearing surface of each locking mechanism part slides along a fixed support body. According to the invention, the support body is provided with an open bearing trough for receiving the bearing surface. ## Claims ### Claim 1 A door lock for a motor vehicle door, the door lock comprising: a locking mechanism including a rotary latch and a pawl, wherein each of the rotary latch and the pawl is rotatably supported on a base about a respective axis; and a fixed support body having a resistance radius from a center of gravity of the support body to a periphery of the support body associated with a modulus of resistance and a bearing trough formed in the periphery, wherein the pawl has a bearing surface with a bearing radius, wherein the pawl engages the bearing trough via the bearing surface, and wherein the resistance radius is larger than the bearing radius, wherein at least one guide surface is provided, wherein the at least one guide surface is provided on a casing of the pawl, and wherein the at least one guide surface is configured to engage at least one corresponding mating guide surface to ensure that the bearing surface remains in contact with the bearing trough. ### Claim 2 (depends on 1) The door lock according to claim 1, wherein the pawl has a bearing pin comprising the bearing surface. ### Claim 3 (depends on 2) The door lock according to claim 2, wherein the bearing surface is formed at a front side of the bearing pin. ### Claim 4 (depends on 1) The door lock according to claim 1, wherein the fixed support body comprises at least one stop that is arranged on a side of the open bearing trough. ### Claim 5 (depends on 4) The door lock according to claim 4, wherein the at least one stop interacts with at least one counter stop of the pawl. ### Claim 6 (depends on 5) The door lock according to claim 5, wherein the at least stop and the at least one counter stop limit a pivoting movement of the pawl with respect to the fixed support body to pivoting angles up to 90°. ### Claim 7 (depends on 1) The door lock according to claim 1, wherein at least one additional bearing body is provided in an engagement region between the rotary latch and the pawl in order to realize a rolling friction. ### Claim 8 (depends on 1) The door lock according to claim 1, wherein the base is formed as a metallic lock case. ### Claim 9 (depends on 1) The door lock according to claim 1, wherein the bearing surface is arc-shaped. ### Claim 10 (depends on 1) The door lock according to claim 1, wherein the pawl comprises a casing made of plastic. ### Claim 11 (depends on 1) The door lock according to claim 1, wherein the at least one guide surface is provided in or on a casing of the pawl and/or a plastic housing. ### Claim 12 (depends on 1) The door lock according to claim 1, wherein the at least one guide surface interacts with a mating guide surface, which is formed on the pawl and/or a casing and/or a plastic housing. ### Claim 13 (depends on 6) The door lock according to claim 6, wherein the pivoting angles are up to 60°. ### Claim 14 (depends on 13) The door lock according to claim 13, wherein the pivoting angles are up to 50°. ### Claim 15 (depends on 1) The door lock according to claim 1, wherein the at least one mating guide surface is formed on the fixed support body. ### Claim 16 (depends on 1) The door lock according to claim 1, wherein the at least one mating guide surface is formed on a plastic housing of the lock. ### Claim 17 (depends on 10) The door lock according to claim 10, wherein the casing includes an opening shaped to rotatably receive the fixed support body. ### Claim 18 A door lock for a motor vehicle door, the door lock comprising: a locking mechanism including a rotary latch and a pawl, wherein each of the rotary latch and the pawl is rotatably supported on a base about a respective axis; and a fixed support body having a resistance radius from a center of gravity of the support body to a periphery of the support body associated with a modulus of resistance and a bearing trough formed in the periphery, wherein the pawl has a bearing surface with a bearing radius, wherein the pawl engages the bearing trough via the bearing surface, and wherein the resistance radius is larger than the bearing radius, wherein the pawl comprises a casing made of plastic, and wherein the casing includes an opening shaped to rotatably receive the fixed support body.