26
`
`202 1-00004/0S0 (TFM-PFLGS59US801)
`
`What is claimed is:
`
`1. Aseat sliding device comprising:
`
`a lower rail extending in a vehicle front-rear direction;
`
`an upper rail configured io move relative to the lower rail in a longitudinal
`
`direction:
`
`alock member attachedto the upper rail, and including lock portions configured
`
`io engage with locked portions formed in the lower rail and to be biased im a lock
`
`direction;
`
`16
`
`a lock release lever turnably supported about an axis in a lefi-right direction with
`
`respect to the upper rail, and contigured to move the lock portions from alock position
`
`io a lock release position in accordance with a lock release operation;
`
`an operation handle connected to a front end of the lock release lever; and
`
`a biasing member configured to bias the front end ofthe lock release lever inthe
`
`lock release direction with a biasing force weaker than a biasing force biasing the lock
`
`portions in the lock direction, wherein
`
`a front upper support surface and a rear upper support surface facing an upper
`
`surface of an end of the operation handle are provided at the front end of the lock release
`
`lever with a gap between the front upper support surface and the rear upper support
`
`surface in the vehicle front-rear direction, and front lower support surfaces facing a lower
`
`surface of an end of the operation handle are provided belowthe front upper support
`
`surface,
`
`the upper rail is provided with a rear lower support surface facing the lower
`
`surface of the end of the operation handle, and the rear lower support surface is positioned
`
`belowthe rear upper support surface,
`
`the biasing member has one end fixed to the upper rail, and another end engaged
`
`with the lowersurface of the end ofthe operation handle from belowat a position between
`
`the front upper support surface and the rear upper support surface, and biases the
`
`operation handle upward, and
`
`30
`
`a clearance is provided in an up-downdirection between the front lower support
`
`

`

`202 1-00004/US0 (TFM-F 1059U801)
`
`surface provided in the lock release lever and the lowersurface ofthe end ofthe operation
`
`handic, and a clearance is provided in the up-down direction between the rear lower
`
`support surface provided in the upperrail and the lower surface ofthe end of the operation
`
`handle.
`
`2. The seat sliding device according to claim 1, wherein
`
`a fixing member for fixing a plate spring to a lower surface of the upperrail is
`
`provided, the plate spring being configured to bias the lock portions in the lock direction,
`
`and
`
`in the biasing member, a base is fixed to the lower surface of the upper rail by
`
`the fixing member together with the lock member, a folded portion of an intermediate
`
`portion extends rearward of the vehicle from the base andis folded forward of the vehicle
`
`in the middle, and a distal end extends forward ofthe vehicle by passing below the fixing
`
`member to form a substantially U-shape.
`
`3. The seat shding device according to claim 2, wherein
`
`a recessed groove extending in the vehicle front-rear direction is providedin the
`
`lower surface of a rear end of the operation handle,
`
`the upper rail is provided with a pair of left and right side walls,
`
`20
`
`the rear lower support surface is formed on protrusions protruding fromthe pair
`
`ofleft and right side walls inwardlyin the left-right direction, and a gap is formed between
`
`distal ends of the pair ofleft and right protrusions, and
`
`the base of the biasing member is provided with a fixing hole into which the
`
`fixing merober is mserted, and a width ofthe distal end of the biasing memberin the lefi-
`
`right direction is formed narrower than the gap between the pair of left and right
`
`protrusions.
`
`4. The seat sliding device according to claim 1, wherein
`
`a shit is provided in the lower surface of the end of the operation handle,
`
`a lock protrusion engaging with the slit is provided at the other end ofthe biasing
`
`

`

`28
`
`202 3-00004/US6 (TFM-FLG59US0))
`
`member, and
`
`the lock protrusion is formed so as to protrude upward of a pressing protrusion,
`
`which is provided at the other end of the biasing member and presses the lower surface
`
`ofthe rear end of the operation handle.
`
`or
`
`5. The seat siding device according to claim 1, whereim
`
`the upper surface of the end of the operation handle is provided with a lock hole,
`
`the lock member or the biasing member includes a biasing portion extending
`
`from a fixed position with respect to the upperrail toward a vehicle front side, and a lock
`
`1d
`
`clawprovided ai a disial end of the biasing portion and engaged with the lock hole,
`
`the rear upper support surfaces of the lock release lever are provided with a gap
`
`between the rear upper support surfaces in the left-right direction, and
`
`a width of the biasing portion im the left-right directionis formed narrower than
`
`the distance between the pair of left and right rear upper support surfaces.
`
`

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