# US 2023/0053771 A1 · Male terminal fitting and terminal fitting structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0053771 A1 - Document ID: US20230053771A1 - Status: Published application - Kind: A1 - Application number: 17/891,174 - Filed: 2022-08-19 - Published: 2023-02-23 - Earliest claimed: 2021-08-23 - Assignees: Sumitomo Wiring Systems, Ltd. - Applicants: Sumitomo Wiring Systems, Ltd. - Inventors: Yuma MAMIYA - Web page: https://patentgrep.com/patent/US20230053771A1 ## CPC - H01R 13/052: {co-operating with sockets having a circular transverse section} - H01R 13/055: {co-operating with sockets having a rectangular transverse section} - H01R 13/114: {co-operating with pins or blades having a square transverse section} - H01R 2101/00: One pole - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract The tab portion extends along a front-rear direction and includes a bottom wall portion, a first side wall portion continuously rising from one end part in a width direction intersecting the connecting direction, out of the bottom wall portion, a second side wall portion continuously rising from the other end part in the width direction, and an upper wall portion continuously extending from an upper end part of the first side wall portion toward an upper end part of the second side wall portion and overlapping the upper end part of the second side wall portion. A first recess extending along the connecting direction and recessed downward is provided in a central part in the width direction in an upper surface of the upper wall portion. ## Claims ### Claim 1 A male terminal fitting, comprising: a tab portion to be connected to a female terminal fitting; and a supporting portion continuous with the tab portion along a connecting direction to the female terminal fitting, wherein: the tab portion extends along the connecting direction and includes a bottom wall portion, a first side wall portion continuously rising from one end part in a width direction intersecting the connecting direction, out of the bottom wall portion, a second side wall portion continuously rising from the other end part in the width direction, and an upper wall portion continuously extending from an upper end part of the first side wall portion toward an upper end part of the second side wall portion and overlapping the upper end part of the second side wall portion, and a first recess extending along the connecting direction and recessed downward is provided in a central part in the width direction in an upper surface of the upper wall portion. ### Claim 2 (depends on 1) The male terminal fitting according to claim 1, wherein a dimension in the width direction of the first recess is 45% or more and 80% or less of a separation distance between the first and second side wall portions. ### Claim 3 (depends on 1) The male terminal fitting according to claim 1, wherein a thickness in the first recess of the upper wall portion is 60% or more and 95% or less of a maximum thickness in a corner part between the upper wall portion and the first side wall portion. ### Claim 4 (depends on 1) The male terminal fitting according to claim 1, wherein: a dimension in the width direction of the bottom wall portion is larger than a dimension in a vertical direction of the first side wall portion, a second recess extending along the connecting direction and recessed upward is provided in a central part in the width direction in a lower surface of the bottom wall portion, and a dimension in the width direction of the second recess is smaller than that of the first recess. ### Claim 5 (depends on 4) The male terminal fitting according to claim 4, wherein the dimension in the width direction of the second recess is 55% or more and 85% or less of the dimension in the width direction of the first recess. ### Claim 6 (depends on 1) The male terminal fitting according to claim 1, comprising: a first tip part continuous with a front end of the upper wall portion and inclined downward toward a front side; and a second tip part continuous with a front end of the bottom wall portion, inclined upward toward the front side and in contact with the first tip part, the first recess extending up to an upper surface of the first tip part. ### Claim 7 (depends on 1) The male terminal fitting according to claim 1, wherein a step portion recessed upward is provided in a region overlapping the upper end part of the second side wall portion, out of a lower surface of the upper wall portion. ### Claim 8 (depends on 1) The male terminal fitting according to claim 1, wherein a dimension in a vertical direction of an upward rising part of the second side wall portion from an upper surface of the bottom wall portion is larger than a dimension in the width direction of the second side wall portion. ### Claim 9 (depends on 1) A terminal fitting structure, comprising: the male terminal fitting according to claim 1; and a female terminal fitting to be connected to the male terminal fitting, wherein: the female terminal fitting includes a connecting tube portion, the male terminal fitting being inserted into the connecting tube portion, and a resiliently deformable resilient connection piece disposed inside the connecting tube portion, the connecting tube portion has a connecting wall at a position facing the resilient connection piece, and the male terminal fitting is sandwiched and electrically connected between the resilient connection piece and the connecting wall. ### Claim 10 (depends on 9) The terminal fitting structure according to claim 9, wherein the upper wall portion comes into contact with the resilient connection piece when the male terminal fitting is inserted into the connecting tube portion. ### Claim 11 (depends on 9) The terminal fitting structure according to claim 9, wherein the bottom wall portion comes into contact with the connecting wall when the male terminal fitting is inserted into the connecting tube portion.