Engaging device for a keyboard for a data processing unit

Claim 2

An engaging device in a data processing unit having a keyboard detachably mounted on a body of said data processing unit such engaging device comprising: engaging means formed at a front lower portion of said body of said data processing unit and extending rearwardly in said body; and leg members rotatably mounted on said keyboard and disengageably engaging with said engaging means.

Claim 3

An engaging device according to claim 1, wherein ther are two similar leg members and each of said leg members is mounted on rearward end of said keyboard end of said keyboard and comprises: an outer cylinder having a leg piece extending tangentially therefrom, and a circumferential step formed on an inner surface at one end thereof; a recess disposed in said step; and an inner cylinder housed in and coaxial with said outer cylinder.

Claim 4

An engaging device according to claim 2, wherein said keyboard includes a cylindrical shaft, said shaft being insertable into a hollow portion between said outer and inner cylinders of said leg member, rotatably supporting said leg member, and having a projection engagable in said recess of said projection of said outer cylinder on an outer surface thereof.

Claim 5

An engaging device according to claim 2 or 3 including a projection formed on a portion of the circumferential step and projecting towards said one end of the outer cylinder, the recess being in the centre of the projection.

Claim 6

An engaging device according to any preceding claim including a recess parallel with the outer cylinder axis and formed at the outer end of the leg piece.

Claim 7

An engaging device according to any preceding claim wherein there are two similar engaging means spaced from each other, and each of said engaging means comprises: a lateral engaging hole formed on a front lower portion of said body of said data processing unit and being slightly larger in size than leg pieces of said leg member; a locking plate attached at its front end on the inner surface of said body, extending rearwardly and downwardly and having a downward convex part, at rear end thereof, fittable in a recess of said leg pieces of said leg members when said leg piece is inserted in said engaging hole; two upper ribs extending rearwardly from an upper edge of said engaging hole, disposed on both sides of said locking plate and having respectively downward projecting portions; and a lower rib extending rearwardly from a lower edge of said engaging hole and disposed beneath said two upper ribs and a clearance between said two upper ribs and said lower rib, said clearance guiding said leg piece of said leg member upon its insertion therein.

Claim 8

An engaging device according to any one of claims 2 to 6 including a spring between said inner cylinder of said leg member and said keyboard to urge the leg member towards the keyboard.

Claim 9

An engaging device according to any one of claims 2 to 6 wherein said outer cylinder of said leg member is outwardly knurled and has a bottom and said inner cylinder is connected to said bottom.

Claim 10

An engaging device according to any one of claims 2 to 8 wherein said projection is inclined at each side of said recess.

Claim 11

An engaging device according to any one of claims 3 to 9, wherein said keyboard has a recess part for receiving said leg piece of said leg member when said leg member is rotated about said cylindrical shaft of said keyboard to a corresponding position.

Claim 12

An engaging device in a data processing unit having a keyboard detachably and tiltably mounted on a body of said data processing unit, such tilt device of said keyboard comprising: recesses formed at both rear corners of said keyboard; a tilting member supported in each of said recesses and rotatably and longitudinally movable along a shaft attached to said keyboard and having a leg piece projectable from a base surface of said keyboard when said tilting member is rotated; a resilient member urging said tilting member in the direction of said shaft, said resilient member being attached at its one end to said tilting member and its other end to said keyboard; and locking means for locking said tilting member against rotation around said shaft at a predetermined position by engaging two locking members with each other when said tilting member rotates, one of said two locking members being attached to said tilting member and the other attached to said shaft.

Claim 13

An engaging device in a data processing unit having a keyboard detachably and tiltably mounted on a body of said data processing unit, such tilt device of said keyboard comprising: recesses formed at both rear corners of said keyboard; a tilting member supported in each of said recesses and rotatably and longitudinally movable along a shaft attached to said keyboard and having a leg piece projectable from a base surface of said keyboard when said tilting member is rotated; a resilient member urging said tilting member in the direction of said shaft, said resilient member being attached at its one end to said tilting member and its other end to said keyboard; and locking means for locking said tilting member against rotation around said shaft at a predetermined position by engaging two locking members with each other when said tilting member rotates, one of said two locking members being attached to said tilting member and the other attached to said shaft.