Elevation adjustment structure for upright lamp arm

• US 5,800,053 A
• Filed: 02/12/1997
• Issued: 09/01/1998
• Est. Priority Date: 02/12/1997
• Status: Expired due to Fees

• Current Assignee: Jonny Shen
• Original Assignee: Jonny Shen
• Inventors: Shen, Jonny
• Primary Examiner(s): Husar, Stephen F.
• Application Number:
  US08/799,417
• Time in Patent Office: 566 Days
• Field of Search: 362/285, 362/288, 362/413, 362/414, 362/418, 362/419, 362/431
• US Class Current: 362/413
• CPC Class Codes: F21S 6/006 for direct lighting only, e.g. task lighting
• CPC Class Codes: F21V 21/22 telescopic

Abstract

The present invention relates to an elevation adjustment structure for household upright lamp arm, and the structure has a cage ring with high-resilience fence ring body, and the cage ring has an open ring with axial notch, and the ring body is mounted near the end of inner rod of lamp arm, and the end of ring body with setting pieces is mounted on the end of inner rod; an end plug is screwed in the end of inner rod with cage ring by means of its thread plug; power cord is inserted through the outlet port near the base of outer rod of lamp arm and extending into the inner rod by means of axial hole of end plug, and an open end of inner rod is connected to the lamp; a screw is rotated into the thread hole on the flange of end plug for retaining the power cord in position; the end of inner rod with end plug is mounted in the outer rod and the distal end of outer rod is screwed with a screw cover; with such assembly the resilience of cage ring may enable the inner rod to move up and down for random positioning to achieve the purpose of easy adjustment of lamp arm elevation.

Claims

1. An elevation adjustment structure for lamp arm, including a cage ring and end plug wherein:

said cage ring made from high resilient material;

both ends of it having a small plate ring respectively and a fence ring formed between the two plate rings, said fence ring to form a cage ring by means of two plate rings expanding toward the intermediate section;

the end of said cage ring projected with a plurality of setting pieces distributed at equal distance on the inner ring;

said cage ring resembling an open ring body with axial notch;

end plug having connection flange, said flange having a thread hole and the center of end plug having an axial hole;

said cage ring and other parts mounted near the end of the inner rod of lamp arm and retained by setting pieces of cage ring;

said end plug screwed in the inner rod by means of thread plug;

the power cord inserted from the outlet port near the base of outer rod and then inserted in the axial hole of end plug and extending to the lamp connection through the other end of inner rod and screwed in the thread hole of end plug by means of a screw for fixing a length of power cord;

the inner rod of lamp arm mounted in the outer rod with the end having end plug, and the distal end of outer rod sealed with a screw cover for holding the cage ring and end plug to prevent the inner rod from separated with the outer rod.