Claims
- 1. A magnetic tape cassette comprising a lid structure pivotally mounted on a housing for movement by a coil spring from an open position exposing a tape run to a closed position in which the lid structure covers the tape run, said coil spring comprising an end portion cooperating with a latch element for releasably latching said lid structure in at least one of said open and closed positions, said latch element further including an abutment end for engaging an end portion of said coil spring the end portion of said coil spring further including a leg portion defining an effective area of contact with the abutment end of said latch member, which effective area is greater than that presented by a length of said leg portion to said abutment end for a given diameter of said leg portion.
- 2. The cassette as set forth in claim 1, wherein said leg portion is formed into a non-linear shape to define said effective area.
- 3. The cassette as set forth in claim 2, wherein said non-linear shape is semi-circular.
- 4. The cassette as set forth in claim 3, wherein the semi-circularly-shaped leg portion is located near a distal end of said leg portion, the portions of said leg portion on either side of same semi-circularly-shaped leg portion being colinear.
- 5. The cassette as set forth in claim 2, wherein said non-linear shape is defined by a first leg portion merging with a second leg portion obliquely-inclined relative to said first leg portion.
- 6. The cassette as set forth in claim 2, wherein said non-linear shape is circular.
- 7. The cassette as set forth in claim 2, wherein a plane containing said non-linear shape lies approximately parallel to a plane of the contacting surface on the abutment end of said latch element.
- 8. The cassette as set forth in claim 2 wherein said non-linear shape is semi-circular and a plane containing said non-linear shape lies approximately parallel to a plane of the contacting surface on the abutment end of said latch element.
- 9. The cassette as set forth in claim 1, wherein said abutment end said latch element for said lid structure further defines an enhanced area for surface contact with the effective area defined by said end portion of said coil spring.
- 10. The cassette as set forth in claim 1, wherein said abutment end defines a contacting surface which essentially lies in a plane, so that a plane containing said effective area of said leg portion of said coil spring lies approximately parallel to the plane of said contacting surface.
- 11. A magnetic tape cassette comprising a lid structure pivotally mounted on a housing for movement by a resilient member from an open position exposing a tape run to a closed position in which the lid structure covers the tape run, said resilient member comprising an end portion cooperating with a latch element for releasably latching said lid structure in at least one of said open and closed positions, said latch element further including an abutment end for engaging an end portion of said resilient member, the end portion of said resilient member further including a leg portion defining an effective area of contact with the abutment end of said latch member which effective area is greater than that presented by a length of said leg portion to said abutment end of a latch member for a given diameter of said leg portion.
Priority Claims (1)
Number |
Date |
Country |
Kind |
35-5576 |
Jan 1985 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of copending U.S. patent application, Ser. No. 651,452, filed Sept. 17, 1984, assigned to the assignee of this application.
US Referenced Citations (4)