Looseleaf binder mechanism

In a looseleaf binder including means for holding looseleaf paper, said paper holding means including a member adapted to be latched to a portion of said binder;

• latching means for so latching said member, said latching means including a latching member shiftable along a given path to and from respective latching and unlatching positions;
• mounting means for securing said latching member to said binder and mounting said latching member for said shiftable movement;
• said mounting means including a mounting member secured to said binder and extending in a direction transverse to said given path;
• and means for detenting said shiftable latching member in each of its two positions;
• said detenting means including:
• a detent member separate from and movable relative to said latching member and mounted on said mounting member for movement therealong, in said transverse direction, relative to and towards and away from said latching member, said detent member comprising an annulus encircling said mounting member;
• abutment stop means engageable by said detent member in the course of the latter's movement away from said latching member;
• one of said detent member and said abutment stop means being of elastomeric material;
• said latching member being provided with a protuberance protruding in said transverse direction and arranged to engage and move said detent member into engagement with said abutment stop means and hold said detent member in squeezed, press-fitted relationship with, by, and between said protuberance and said abutment stop means, in the course of the shifting movement of said latching member between its latching and unlatching positions.