Patent EP0509865A2 successfully refreshed from Google Patents.
EP0509865A2
Expired / Lapsed
EP
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Emergency lock mechanism for vehicular seat
Assignee: JTEKT Column Systems Corp
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Filing: 1992-03-27
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Granted: —
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Expires: 2012-03-27
Abstract
Abstract The emergency lock mechanism (8,80,180) is to be attached to a vehicular seat of which a seatback is locked at one side by a seat reclining device and hinged at the other side with respect to a seat cushion, for locking the rotation of the hinged side of the seatback subjected to an impulsive load in an emergency, and comprises a lower tooth member (50,150,350) attachable to the seat cushion at the hinged side and having engaging teeth, an upper tooth member (20,250,251,251A,251B,324,325,325B) provided for rotating with reclining of the seatback and having engaging teeth (22,258,259, 259B,324a,325a,325c) for facing and engaging the teeth of the lower tooth member, an arm (40,140,340) rotatably provided, with respect to the seat cushion, and a limiting member (30,56,121,254B,345a,345b,328A,328B) disposed adjacent to the upper tooth member, for normally preventing the upper tooth member from engaging the lower tooth member, the limiting member being moved by rotation of the arm in the emergency to allow the upper and lower tooth members to engage each other.
Inventors
- 👤 Mitsuji C/O Fujikiko K.K. Yamamura
- 👤 Keisuke c/o Fujikiko K.K. Kino
- 👤 Hatsuo c/o Fujikiko K.K. Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 14:05
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/24; B60N2/42; B60N2/433
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
An emergency lock mechanism (8, 80, 180) attachable to a vehicular seat of which a seatback is locked at one side by a seat reclining device and hinged at the other side with respect to a seat cushion, for locking rotation of the hinged side of the seatback subject to an impulsive load in an emergency, comprising: a lower tooth member (50, 150, 350, 350) attachable to the seat cushion and having engaging teeth (52, 152, 252, 352); an upper tooth member (20, 250, 251, 251A, 251B, 324, 325, 325B) provided with teeth (22, 258, 259, 259B, 324a, 325a, 325c) for facing and engaging the teeth of the lower tooth member; an arm (40, 140, 340) rotatably provided, with respect to the lower tooth member; and a limiting member (30, 56, 121, 254B, 345a, 345b, 328A, 328B) disposed adjacent to the upper tooth member, for normally preventing the upper tooth member and the lower tooth member from engaging each other, the limiting member being moved by rotation of the arm in the emergency to allow the upper and lower tooth members to engage each other.
Claim 2
Dependent Claim
123 words
The lock mechanism (8) of Claim 1, wherein the arm (40) has teeth (42) facing the engaging teeth (52) of the lower tooth member (50), each tooth (42) of the arm (40) being normally positioned between the teeth (22) of the upper tooth member (20), and the lower tooth member (50) being energized to press the teeth (52) thereof against the teeth (42, 22) of the arm (40) and the upper tooth member (20), thereby the upper and lower tooth members (20, 50) are normally prevented from engaging each other and allowed to engage each other in the emergency by rotation of the arm (40), which causes the teeth (42) of the arm to superimpose the teeth (22) of the upper tooth member.
Claim 3
Dependent Claim
95 words
The lock mechanism (8) of Claim 1, wherein the arm (40) has a cam pin (46), and the limiting member is a cam follower plate (30) formed with a mountain-shaped cam groove (36) which engages the cam pin (46), the cam follower plate (30) being normally positioned between the teeth (22) of the upper tooth member (20) and the teeth (52) of the lower tooth member (50) in order to prevent the upper and lower tooth members (20, 50) from engaging each other and moved in the emergency by means of the cam (36, 46).
Claim 4
Dependent Claim
105 words
The lock mechanism (8) of Claim 1, wherein the limiting member is a cam follower plate (30) formed with a mountain-shaped cam groove (36) and connected to the arm (40) through an intermediate link plate (60) provided with a cam pin (61) for engaging the mountain-shaped cam groove (36), the cam follower plate (30) being normally positioned between the teeth (22) of the upper tooth member (20) and the teeth (52) of the lower tooth member (50) in order to prevent the upper and lower tooth members (20, 50) from engaging each other and moved in the emergency by means of the cam (36, 61).
Claim 5
Dependent Claim
95 words
The lock mechanism (8) of Claim 1, wherein the arm (40) is provided with a cam groove (46b), and the limiting member is a cam follower plate (30) provided with a pin (36b) for engaging the cam groove (46b), the cam follower plate (30) being normally positioned between the teeth (22) of the upper tooth member (20) and the teeth (52) of the lower tooth member (50) in order to prevent the upper and lower tooth members (20, 50) from engaging each other and moved in the emergency by means of the cam (36b, 46b).
Claim 6
Dependent Claim
105 words
The lock mechanism (80) of Claim 1, wherein the upper tooth member (250, 251, 251A) is provided with cam surface (260, 261, 261A) and rotatably mounted on the arm (140), and the limiting member is a cam pin (121) fixed to the locked side of the seatback, for engaging the cam surface (260, 261, 261A) of the upper tooth member (250, 251, 251A), the fixed cam pin (121) normally preventing the upper and lower tooth members (250, 251, 251A, 150) from engaging each other and causing in the emergency the upper tooth member (250, 251, 251A) to rotate and engage the lower tooth member (150).
Claim 7
Dependent Claim
102 words
The lock mechanism (180) of Claim 1, wherein the lower tooth member (350) has internal teeth (352), and the upper tooth member (320) and the arm (340) have cam portions (324b, 345a, 345b) for engaging each other, the engaging teeth (324a) and the cam portion (324b) of the upper tooth member (320) and the cam portion (345a, 345b) of the arm (340) being disposed inside the internal teeth (352) of the lower tooth member (350) and normally preventing the upper and lower tooth members (320, 350) from engaging each other and being moved in the emergency by rotation of the arm (340).
Claim 8
Dependent Claim
82 words
The lock mechanism (80, 180) of Claim 1, wherein the limiting member (254B, 328A, 328B) energizes the upper tooth member (251B, 325, 325B) to recede away from the lower tooth member (250, 350), and the upper tooth member (251B, 325, 325B) and the arm (140, 340) have cam portions (253B, 145; 346, 325b; 346b, 325d) for engaging each other, thereby the upper tooth member is moved in the emergency by means of the cam and is engaged with the lower tooth member.
Claim 9
Dependent Claim
59 words
The lock mechanism (180) of Claim 8, wherein the lower tooth member (350) has internal teeth (352), and the engaging teeth (325a, 325c) and the cam portion (325b, 325d) of the upper tooth member (325, 325B) and the cam portion (346, 346B) of the arm (340) are disposed inside the internal teeth (352) of the lower tooth member (350).
References Cited (Backward Citations)
No citation records indexed.
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