Closing device for original cover

• US 6,158,085 A
• Filed: 05/12/1998
• Issued: 12/12/2000
• Est. Priority Date: 05/15/1997
• Status: Expired due to Term

• Current Assignee: Kem HongKong Limited
• Original Assignee: Katoh Electrical Machinery Company Limited
• Inventors: Oshiro, Kazuhiko
• Primary Examiner(s): Knight, Anthony
• Assistant Examiner(s): Pickard, Alison K.
• Application Number:
  US09/076,536
• Time in Patent Office: 945 Days
• Field of Search: 16/72, 16/341, 16/303
• US Class Current: 16/72
• CPC Class Codes: E05D 11/1064 with a coil spring perpendicular to the pivot axis
• CPC Class Codes: E05F 1/1261 for counterbalancing
• CPC Class Codes: E05Y 2201/638 Cams; Ramps
• CPC Class Codes: E05Y 2600/46 in or on the wing
• CPC Class Codes: E05Y 2999/00 Subject-matter not otherwise provided for in this subclass

Abstract

In order to provide a closing device for an original cover in which a spring case is not cracked or broken during use even if zircon by which the spring case can be cheaply manufactured and which has excellent mechanical characteristics is especially used, the closing device has the spring case made of a synthetic resin provided for either an attaching member attached to a machine body or a supporting member for holding the original cover rotatably connected to the attaching member via a hinge pin and the rotation moment of the original cover attached to the supporting member is controlled by using a compression force of a compression coil spring housed in the spring case, wherein a reinforcing frame member made of a metal for reinforcing the spring case is attached to the spring case.

Claims

1. A closing device for an original cover, comprising a spring case having a bottom portion and opposite side portions and made of a synthetic resin provided for either an attaching member attached to a machine body or a supporting member for holding an original cover rotatably connected to the attaching member via a hinge pin, for controlling a rotation moment of the original cover attached to said supporting member by using a compression force of compression coil springs housed in the spring case, wherein a reinforcing frame member made of a metal for reinforcing said spring case comprises a base plate portion for covering the bottom portion of said spring case and having opposite ends, side plate portions bent from both opposite ends of said base plate portion to a direction away from a plane of the base plate portion for covering the opposite side portions of said spring case, and attaching holes opened at said side plate portions for connecting to said hinge pin, so that said reinforcing frame member is fastened to said spring case by inserting said hinge pin to said attaching holes.

2. A closing device for an original cover, comprising:

an attaching member attached to a machine body;

a cam part mounted on the attaching member;

a supporting member made of a synthetic resin which faces the cam part and supports an original cover rotatably connected to said attaching member via a hinge pin;

a spring case made of a synthetic resin integrally formed with the supporting member and having a bottom portion and opposite side portions;

a slider housed in the spring case so as to be slidable toward said cam part;

a compression spring compressedly provided between the slider and the bottom of said spring case in order to press said slider toward said cam part; and

a reinforcing frame member made of a metal for reinforcing said spring case and comprising a base plate portion for covering the bottom portion of said spring case and having opposite ends, side plate portions bent from both opposite ends of said base plate portion to a direction away from a plane of the base plate portion for covering the opposite side portions of said spring case, and attaching holes opened at said side plate portions for connecting to said hinge pin, so that said reinforcing frame member is fastened to said spring case by inserting said hinge pin to said attaching holes.

3. A closing device for an original cover, comprising:

an attaching member attached to an upper part of a spring case having a bottom portion and opposite side portions and made of a synthetic resin also serving as a leg attached to a machine body;

a supporting member for supporting an original cover rotatably connected to said attaching member via a hinge pin;

a cam part provided for the supporting member;

a slider slidably housed in said spring case so as to face the cam part;

a compression spring compressedly provided between the slider and said spring case in order to energize said slider to slide toward said cam part; and

a reinforcing frame member made of a metal for reinforcing said spring case and comprises a base plate portion for covering the bottom portion of said spring case, side plate portions bent from opposite ends of said base plate portion to a direction away from a plane of the base plate portion for covering the opposite side portions of said spring case, and attaching holes opened at said side plate portions for connecting to said hinge pin, so that said reinforcing frame member is fastened to said spring case by inserting said hinge pin to said attaching holes.