| 摘要 |
The adjustment unit (105) fitted to a vehicle seat, to adjust the pitch of the backrest, gives a relative movement between the upper (111) and lower (109) sections of the seat to give a free central swing movement to the backrest through a swing section (114). The free swing section is at a locking unit (135) at the upper seat section, secured to the lower seat section by a slit and pin system (145,147). The locking unit is a ring around the swing axis of the free swing section.
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