Device for moderating movement of lid

• US 4,342,135 A
• Filed: 09/30/1980
• Issued: 08/03/1982
• Est. Priority Date: 10/03/1979
• Status: Expired due to Term

• Current Assignee: Sharp Corporation (Hon Hai Precision Industry Co., Ltd.), Nifco Incorporated
• Original Assignee: Sharp Corporation (Hon Hai Precision Industry Co., Ltd.), Nifco Incorporated
• Inventors: Matsuo, Hiroshi, Omata, Nobuaki
• Primary Examiner(s): Reynolds, Wm. Carter
• Application Number:
  US06/192,644
• Time in Patent Office: 672 Days
• Field of Search: 16/51, 16/54, 16/55, 16/82, 16/83, 16/84, 16/DIG. 13, 16/225, 16/76, 16/77, 188/290, 188/306
• US Class Current: 16/82
• CPC Class Codes: F16F 9/12 Devices with one or more rotary vanes turning in the fluid any throttling effect being immaterial, i.e. damping by viscous shear effect only F16F9/53 takes precedence; pivoting supports for apparatus or articles placed on stands or trestles F16M11/06
• CPC Class Codes: G11B 15/67589 with ejection damping means
• CPC Class Codes: Y10S 16/09 Hydraulic actuated checks, closers

Abstract

The movement of a lid such as for a cassette holder in a cassette tape recorder is moderated by a device comprising only two component parts. At least one disc which is interlocked with a roller held in frictional engagement with part of the lid is contained together with damping oil within a housing composed of a pair of halved portions connected to each other through the medium of a hinge. The moderation of the lid movement is accomplished by the damping oil functioning to slow the rotation of the roller.

Claims

1. A device for moderating the movement of a lid, comprising:

a rotary member composed of a rotary shaft, a roller integrally formed at one terminal side of said rotary shaft and adapted to be held in frictional engagement with a member imparted motion by the lid and at least one disc formed at the other terminal side of said rotary shaft; and

a housing composed of a pair of halved portions connected to each other through the medium of a hinge, said halved portions being provided with complementary engaging means adapted to come into mutual engagement when the halved portions are rotated about said hinge toward each other and brought into intimate contact with each other, and said halved portions containing semicircular grooves adapted to form empty spaces for accommodating the rotary shaft and the discs of said rotary member and damping oil when the halved portions are joined to each other.

2. The device according to claim 1, wherein a small disc is disposed around the rotary shaft between the roller and the disc of said rotary member and an empty space for admitting forced insertion of said small disc is formed in the housing, whereby the housing ensures prevention of oil leakage.

3. The device according to claim 1, wherein at least one disc of said rotary member is provided with perforations adapted to regulate the damping force exerted by the oil.