Title:
AUTOMATIC BLACKBOARD RAISING/LOWERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/020275
Kind Code:
A1
Abstract:
A blackboard raising/lowering device of the present invention is a blackboard raising/lowering device capable of raising or lowering a blackboard frame (78), the device comprising: a plurality of link arms (31, 32, 65) hinge-coupled to each other; screw shafts (35, 66) screw-coupled with at least one link arm among the plurality of link arms (31, 32, 65) so as to raise/lower at least one of the link arm; and a motor (40) for driving the screw shafts. Accordingly, the present invention: enables a user to safely and conveniently operate a terminal box since an entire blackboard frame, which is heavy, having an integrated structure of the blackboard and various functions is provided to be highly efficient and to have a reduction in noise according to the operation thereof; and has a simple structure so as to be easily produced.
Inventors:
LEE KYU HEUNG (KR)
Application Number:
PCT/KR2013/010342
Publication Date:
February 12, 2015
Filing Date:
November 14, 2013
Export Citation:
Assignee:
LEE KYU HEUNG (KR)
International Classes:
B43L1/04; A47B97/04
Foreign References:
| KR200285224Y1 | 2002-08-13 | |||
| KR200307131Y1 | 2003-03-15 | |||
| KR200297464Y1 | 2002-12-12 | |||
| KR200208432Y1 | 2001-01-15 |
Attorney, Agent or Firm:
JUNG, CHANG SU (KR)
정창수 (KR)
정창수 (KR)
Download PDF:
Previous Patent: INSERT, TOOL HOLDER, AND ASSEMBLY THEREOF
Next Patent: PREFABRICATED MODULAR PLATE AND MODULAR FOLDING STORAGE BOX USING SAME
Next Patent: PREFABRICATED MODULAR PLATE AND MODULAR FOLDING STORAGE BOX USING SAME