Magnetic recording-reproducing device

A magnetic recording-reproducing device comprising:

• a housing having a bottom plate and a cartridge containing a magnetic tape therein to be inserted and loaded or discharged, said cartridge having a side surface formed to have an engagement portion recessed therein;
• a first slide member arranged on the bottom plate of said housing and slidable in an insertion direction and discharging direction of said cartridge while mounting said cartridge thereon, the first slide member formed of a spring metallic plate and having a locking roller fitted to said engagement portion to lock the engagement portion, the first slide member having an arm portion to rotatable hold the locking roller in a horizontal state enabling said locking roller to move on the bottom plate of said housing as the first slide member is slid;
• and
• a second slide member arranged in said housing to cause said first slide member to be slid in the insertion direction and discharging direction of said cartridge, said second slide member causing said first slide member to be slid in the insertion direction of said cartridge while said locking roller of said first slide member is fitted to and locked at said engagement portion,
• said bottom plate of said housing having a window, said locking roller of said first slide member slidably disposed on said window such that when said first slide member is slidably disposed on said window, an insertion end portion of said cartridge abuts against said locking roller to cause said locking roller to be fitted to the engagement portion of said cartridge and locked while said arm portion pushes down said locking roller in said window against an upward biasing force of said first slide member, said cartridge being mounted on said first slide member and said first slide member slidable in said housing up to a predetermined position,
• said cartridge mounted to said first slide member being locked when said locking roller is positioned at said engagement portion in the position of said window, and when said locking roller is positioned at said engagement portion in the position of said window and said first slide member is slid in the inserting direction of said cartridge, said locking roller is moved from said window onto said bottom plate, thereby restricting a downward movement of said locking roller by said bottom plate, and
• when said cartridge is discharged, said first slide member having said cartridge mounted thereon is slid in the discharging direction, and when said locking roller having the engagement portion of said cartridge locked therein is positioned on said window and said cartridge is pulled in the discharging direction, said insertion end portion of said cartridge causes said locking roller to be pushed down within said window while resisting against the upward biasing force of said first slide member with said arm portion and moved away from said engagement portion.