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Patent Searching and Data


Title:
NEW TYPE OF CASTER
Document Type and Number:
WIPO Patent Application WO/2018/119982
Kind Code:
A1
Abstract:
Provided is a caster, comprising: a connection column (1), a metal slider (2), a support-column upper-half part (3), a linkage device (4), a plastic slider (5), a spring structure (6), gaps (7), and a rotary shaft (10); the rotary shaft (10) is mounted on the middle part of the support column of the lower part of the caster, such that the rotary shaft (10) is integrated with the support column and roller wheel (12) of the caster; the connection column (1) is fixedly connected to the upper part of the support column; two symmetrical gaps (7) are provided on the connection column (1); the support column above the rotary shaft (10) forms the core column of a hollow cylindrical column; two symmetrical gaps having appropriate sizes are provided on the core column, and the gaps are vertically aligned with the connection-column gaps (7); the metal slider (2) tightly joined with the gaps (7) is mounted in the connection-column gaps (7); the plastic slider (5) tightly joined with the gaps is mounted in the core column gaps; the metal slider (2) is linked to the plastic slider (5) by means of the linkage device (4) in the hollow part of the column, such that the metal slider (2) travels inward at the same time that the plastic slider (5) pushes inward; when the four sliders have traveled inward to the maximum extent, they form, with the column body, a cylindrical column having a fully smooth external surface, such that the caster is simple to mount and dismount; thus the problem of a caster being inconvenient to replace after becoming damaged during daily use is resolved.

Inventors:
LIU QINGHUA (CN)
Application Number:
PCT/CN2016/113374
Publication Date:
July 05, 2018
Filing Date:
December 30, 2016
Export Citation:
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Assignee:
LIU QINGHUA (CN)
International Classes:
B60B33/00
Foreign References:
EP1142729A22001-10-10
CN104453348A2015-03-25
CN2572118Y2003-09-10
CN203697860U2014-07-09
CN204812499U2015-12-02
CN203819147U2014-09-10
US6520598B12003-02-18
DE10214994A12003-10-16
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