Attaching Device for End of Spring

Abstract

There is disclosed an attaching device (6) for fixing an end portion (7a) of at least one spring (7) for supporting a cushion for a seat, to a seat frame of the seat, wherein the seat frame includes opposing seat frame sections, one of the opposing seat frame sections being formed from a round shaft (3), the at least one spring being stretched between the opposing seat frame sections, and the end portion of the at least one spring being formed substantially in a U-shape in outline. The attaching device (6) comprises a resin-made collar (6a) of a substantially reverse U-shape in cross-section adapted to be fitted over the round shaft (3) and a metal-made retainer (6b) including a body (60) having a geometry of similar figure with the collar and adapted to be fitted over the collar on the round shaft, and at least one pair of inner and outer spring engagement pieces (61, 62) provided at both edges of the body, the inner and outer spring engagement piece extending downward from the both edges of the body and bent laterally outwardly at lower ends thereof. A first axial region (71) and second axial region (72) of the substantially U-shaped end portion (7a) of the at least one spring (7) are adapted to be engaged with the inner spring engagement piece (61) and the outer spring engagement piece (62), respectively, whereby the end portion of the at least one spring is adapted to be fixed to the round shaft through the attaching device.

Description

TECHNICAL FIELD[0001]The present invention relates to an attaching device for fixing end portions of springs to be stretched between opposing frame sections of a seat cushion frame for a seat and, more particularly, to an attaching device for fixing end portions of springs, each of which has a substantially U-shape in outline, to a round shaft which is employed as a frame section constituting one of opposing frame sections of a seat cushion frame for a seat.BACKGROUND ART[0002]As a vehicle seat, there has been proposed a vehicle seat in which a metal-made round shaft is employed as a rear frame section of a seat cushion frame for the seat, zigzag springs for supporting a cushion thereon are stretched between the round shaft and a forward frame section of the seat cushion frame, and end portions of the zigzag springs are fixed to the round shaft by a retainer (Japanese Patent Application Laid-Open No. 2006-14867).[0003]The retainer comprises a longitudinal body of a substantially U-s...

AI Technical Summary

Benefits of technology

[0005]It is therefore an object of the present invention to provide an attaching device for fixing end portions of springs to a round shaft, which can overcome the foregoing problem associated w

Problems solved by technology

Moreover, when the retainer which is formed of metal material is directly fitted over the metal-made round shaft, there is a possibility that noise will be produced by rubbing the metal-made retai

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