Cassette holder moving mechanisms
AssigneeFuji Photo Film Co., Ltd.
InventorTakeshi Fujishiro
Life of this patent
Estimating the term…
Abstract
In a magnetic recording and reproduction apparatus in which a cassette holder 11 is supported movably relative to a slide chassis 15 by two moving mechanism 16 and 17, the number of teeth of a pinion 40 at the moving mechanism 16 side is increased compared to a pinion 41 at the moving mechanism 17 side to prevent the cassette holder from coming up at the moving mechanism 16 side at the descending end of the cassette holder 11 to obtain a stable holding force. Further, racks 38 and 39 engaging with the pinions 40 and 41 at the descending end position of the cassette holder 11 is increased in tooth thickness to reduce backlash between the racks 38 and 39 and the pinions 40 and 41 at the descending end of the cassette holder 11, thereby obtaining improved operability.
Claims3
A magnetic recording and reproduction apparatus having a main unit with a base chassis, and a cassette holder defining front, rear, and opposite sides and adapted to hold a box-type cassette case having a wound magnetic tape, comprising:
- a slide chassis slidably provided in said main unit for holding said cassette holder such that said cassette holder is capable of being vertically moved between an up position and a down position, wherein said cassette holder remains substantially level while ascending and descending between said up and down positions;
- a first moving mechanism and a second moving mechanism which are operatively connected between said cassette holder and said slide chassis and are disposed at respective opposite sides of said cassette holder, wherein said first moving mechanism and said second moving mechanism guide said cassette holder between said up and down positions while maintaining said cassette holder substantially level;
- connecting means for synchronizingly connecting said first and second moving mechanisms, and ensuring that said cassette holder remains substantially level and substantially parallel to said slide chassis, comprising:
- a rack and pinion engaging with said rack and provided at one end of each moving mechanism;
- and
- a connecting rod rotatably supported on said cassette holder and having said pinions mounted to both ends of said connecting rod;
- wherein said racks each comprise a plurality of teeth in line, the tooth thickness of said racks engaging with said pinions at the ascending end position of said cassette holder being greater than that of said racks engaging with said pinions at the descending end of said cassette holder.
Dependencies are inferred from the claim text.