# US 12,119,192 B2 · Hermetic terminal and contact device using the hermetic terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,192 B2 - Document ID: US12119192B2 - Status: Granted - Kind: B2 - Application number: 17/634,078 - Filed: 2021-03-16 - Published: 2022-08-18 - Granted: 2024-10-15 - Earliest claimed: 2020-03-18 - Assignees: SCHOTT Japan Corporation - Applicants: SCHOTT Japan Corporation - Inventors: Ko Mamiya; Masahiro Ito - Web page: https://patentgrep.com/patent/US12119192B2 ## CPC - H01H 50/023: {Details concerning sealing, e.g. sealing casing with resin} - H01H 50/14: Terminal arrangements {(for coils H01H50/443)} - H01H 50/546: {for contactors having bridging contacts} - H01H 50/641: {intermediate part performing a rectilinear movement (H01H50/645, H01H50/66 - H01H50/74 take precedence)} - 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 contact device according to the present disclosure includes: a metal container having a through hole and an opening; a pipe lead inserted into the through hole; an insulating material that seals the metal container and the pipe lead; and a terminal base made of a low-resistance metal, the terminal base penetrating the pipe lead and being fixed to the pipe lead. The pipe lead has a fragile portion that relieves external stress. ## Claims ### Claim 1 A hermetic terminal comprising: a metal container having a through hole; a pipe lead inserted into the through hole; an insulating material that seals the metal container and the pipe lead; and a terminal base made of a low-resistance metal, the terminal base penetrating the pipe lead and being fixed to the pipe lead, wherein the pipe lead has a main portion and a fragile portion that relieves external stress, and the insulating material seals the main portion of the pipe lead to the metal container, and does not seal the fragile portion of the pipe lead to the metal container. ### Claim 2 (depends on 1) The hermetic terminal according to claim 1, wherein rigidity of the fragile portion is lower than rigidity of the main portion, or proof stress of the fragile portion is lower than proof stress of the main portion. ### Claim 3 (depends on 1) The hermetic terminal according to claim 1, wherein rigidity of the fragile portion is lower than rigidity of the main portion, and proof stress of the fragile portion is lower than proof stress of the main portion. ### Claim 4 (depends on 1) The hermetic terminal according to claim 1, wherein the fragile portion includes a thin portion that is thinner than the main portion. ### Claim 5 (depends on 1) The hermetic terminal according to claim 1, wherein the pipe lead has a stepped portion. ### Claim 6 (depends on 1) The hermetic terminal according to claim 1, wherein the low-resistance metal is the terminal base is made of copper, aluminum, a copper-based alloy, or an aluminum-based alloy. ### Claim 7 (depends on 1) The hermetic terminal according to claim 1, wherein the insulating material is made of glass or an epoxy resin. ### Claim 8 A contact device that is opened and closed by an electromagnetic device, the contact device comprising: a metal container having a through hole and an opening; a pipe lead inserted into the through hole; an insulating material that seals the metal container and the pipe lead; a terminal base made of a low-resistance metal, the terminal base penetrating the pipe lead and being fixed to the pipe lead; a lid body that covers and seals a peripheral edge of the opening of the metal container; and a movable contact supported by a shaft penetrating the lid body, wherein the pipe lead has a main portion and a fragile portion that relieves external stress, the terminal base has a fixed contact point, and the movable contact has a movable contact point, and the insulating material seals the main portion of the pipe lead to the metal container, and does not seal the fragile portion of the pipe lead to the metal container. ### Claim 9 (depends on 8) The contact device according to claim 8, wherein rigidity of the fragile portion is lower than rigidity of the main portion, or proof stress of the fragile portion is lower than proof stress of the main portion. ### Claim 10 (depends on 8) The contact device according to claim 8, wherein rigidity of the fragile portion is lower than rigidity of the main portion, and proof stress of the fragile portion is lower than proof stress of the main portion. ### Claim 11 (depends on 8) The contact device according to claim 8, wherein the fragile portion includes a thin portion that is thinner than the main portion. ### Claim 12 (depends on 8) The contact device according to claim 8, wherein the pipe lead has a stepped portion. ### Claim 13 (depends on 8) The contact device according to claim 8, wherein the low-resistance metal is the terminal base is made of copper, aluminum, a copper-based alloy, or an aluminum-based alloy. ### Claim 14 (depends on 8) The contact device according to claim 8, wherein the insulating material is made of glass or an epoxy resin.