EP0420824B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A backrest for a seat, particularly a motor-vehicle seat
Assignee: Fiat Auto SpA
•
Filing: 1990-09-18
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Granted: 1994-01-05
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Expires: 2010-09-18
Abstract
No abstract record available.
Inventors
- 👤 Giovanni Acuto
- 👤 Antonio Dal Monte
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:53
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/64; B60N2/66; B60N2/667
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
167 words
A backrest (B) for supporting the back of the occupant of a seat (S), comprising a frame (1), a mass of padding (2) fitted to the frame and a spring structure (3 to 5) for supporting the padding mass (2) on the frame (1) in a resiliently yielding manner, the spring structure comprising a strip-member (5) arranged in such a position as to provide lumbar support for the back of the occupant of the seat (S), characterised in that - the strip member (5) is generally butterfly-shaped with a central portion and two opposite ends (6), its height increasing from the central portion towards the ends, and - the strip member (5) comprises two parts (51, 52) hinged to each other (7) along a hinge axis which extends substantially in the central vertical plane of the backrest (B), whereby they can conform as a whole to the back of the occupant of the seat (S) so as to achieve a fit of the lumbar support member (5).
Claim 2
Dependent Claim
23 words
A backrest according to Claim 1 characterised in that the strip member (5) is supported resiliently (61 to 63) on the frame (1).
Claim 3
Dependent Claim
50 words
A backrest according to Claim 2, characterised in that the strip member (5) is generally elongate and extends between two opposite ends along a principal axis transverse the frame (1) and in that spring support means (61 to 63) are interposed between each of the ends and the frame (1).
Claim 4
Dependent Claim
28 words
A backrest according to any one of Claims 1 to 3, characterised in that the mass of padding (2) has recesses (8) for housing the strip member (5).
Claim 5
Dependent Claim
91 words
A backrest according to claim 1, characterised in that the strip member (5) is constituted by at least two parts (51, 52) which are mounted on the frame (1) by respective support means (100) and can pivot relative to the frame (1) so that the overall profile of the strip member (5) can be varied in order to adjust the lumbar support member (5), and in that means (102, 104; 107; 109; 112, 115) are provided for varying the distance between the two parts (51, 52) at their facing inner ends.
Claim 6
Dependent Claim
37 words
A backrest according to Claim 5, characterised in that the strip member (5) is generally butterfly-shaped with a central portion and two outer ends (6) which increase in depth from the central portion towards to the ends.
Claim 7
Dependent Claim
29 words
A backrest according to any one of the preceding claims, characterised in that the parts (51, 52) of the strip member (5) are made of a substantially rigid material.
Claim 8
Dependent Claim
54 words
A backrest according to any one of Claims 5 or 6, characterised in that the respective support means (100) can allow the strip member (5) to effect a general rocking movement about a horizontal axis in order for the strip member (5) to adjust itself to the vertical curvature of the seat occupant's back.
Claim 9
Dependent Claim
32 words
A backrest according to Claim 5, characterised in that the parts (51, 52) of the strip member (5) are connected to the frame (1) by means of substantially inextensible support elements (100).
Claim 10
Dependent Claim
24 words
A backrest according to Claim 5 or Claim 9, characterised in that the respective support means (100) are generally filament-like and extend substantially horizontally.
Claim 11
Dependent Claim
41 words
A backrest according to any one of the Claims 5 to 10, characterised in that the two parts (51, 52) of the strip member (5) are interconnected at their facing inner ends with the interposition of resiliently extensible elements (102, 107).
Claim 12
Dependent Claim
54 words
A backrest according to Claim 10, characterised in characterised in that the generally filament-like support means (100) are interconnected so as to form a single tie for supporting the strip member (5) with the interposition of at least one spring (102) for enabling the distance between the two parts (51, 52) to be varied.
Claim 13
Dependent Claim
67 words
A backrest according to Claim 5, characterised in that the two parts (51, 52) of the strip member (5) are interconnected at their facing inner ends by a tie element (103) whose opposite ends (105) each face a respective part (51) and in that resilient means (104) are interposed between each of the opposite ends (105) of the tie element (103) and the respective part (51, 52).
Claim 14
Dependent Claim
18 words
A backrest according to Claim 13, characterised in characterised in that the resilient means (104) operate under compression.
Claim 15
Dependent Claim
27 words
A backrest according to Claim 11, characterised in that the two parts (51, 52) are interconnected at their facing inner ends by a resilient annular element (107).
Claim 16
Dependent Claim
37 words
A backrest according to Claim 5, charcterised in that it includes adjustment means (108 to 114) for positively varying the relative inclination and/orthe relative spacing of the two parts (51, 52) of the strip member (5) selectively.
Claim 17
Dependent Claim
30 words
A backrest according to Claim 16, characterised in that the adjustment means comprise eccentric means (109) which cooperate with the two parts (51, 52) and can be rotated selectively (108).
Claim 18
Dependent Claim
37 words
A backrest according to Claim 13 and Claim 17, characterised in that the eccentric means (108) are keyed to the tie element (103), and in that means (108) are provided for selectively rotating the tie element (103).
Claim 19
Dependent Claim
31 words
A backrest according to Claim 16, characterised in that it includes traction elements (111 to 117) acting between the frame (1) and the parts (51, 52) of the strip member (5).
Claim 20
Dependent Claim
30 words
A backrest according to Claim 19, characterised in that it includes separate traction elements (112) for each of the at least two parts (51, 52) of the strip member (5).
Claim 21
Dependent Claim
26 words
A backrest according to Claim 19 or Claim 20, characterised in that the traction elements are operated by a rotatable shaft (114) with gooseneck parts (114a).
Claim 22
Dependent Claim
32 words
A backrest according to any one of claims 19 to 21, characterised in that the frame (1) includes a structural element (110) with holes (111) through which the traction elements (112) pass.
Claim 23
Dependent Claim
25 words
A backrest according to Claim 19, characterised in that it includes a single traction element (115) with a pass extending around the band element (5).
Claim 24
Dependent Claim
46 words
A backrest according to Claim 1 or Claim 5, characterised in that the respective support means (100 - Figure 19 to 21) are formed as resilient elements for biasing the two parts (51, 52) to a relative position in which they are closed and close together.
References Cited (Backward Citations)
No citation records indexed.
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