U.S. patent application number 11/174612 was filed with the patent office on 2007-01-11 for shoulder strap.
This patent application is currently assigned to CASE PAX INTERNATIONAL CO., LTD.. Invention is credited to Tien-Lai Lin.
Application Number | 20070007314 11/174612 |
Document ID | / |
Family ID | 37617388 |
Filed Date | 2007-01-11 |
United States Patent
Application |
20070007314 |
Kind Code |
A1 |
Lin; Tien-Lai |
January 11, 2007 |
Shoulder strap
Abstract
A shoulder strap includes a strap unit and an anti-slip unit.
The anti-slip unit includes a sleeve portion, through which the
strap unit is extended, and a bendable wing portion outward
extended from one side of the sleeve portion. The wing portion
increases the bearing and contact area of the shoulder strap with a
user's shoulder to produce good anti-slip effect.
Inventors: |
Lin; Tien-Lai; (Taipei,
TW) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
CASE PAX INTERNATIONAL CO.,
LTD.
|
Family ID: |
37617388 |
Appl. No.: |
11/174612 |
Filed: |
July 6, 2005 |
Current U.S.
Class: |
224/264 ;
224/578; 224/617 |
Current CPC
Class: |
A45F 3/12 20130101 |
Class at
Publication: |
224/264 ;
224/578; 224/617 |
International
Class: |
A45F 3/12 20060101
A45F003/12 |
Claims
1. A shoulder strap comprising a strap unit and an anti-slip unit;
said anti-slip unit further comprising a sleeve portion and a wing
portion, and said strap unit being extended through and fitted in
said sleeve portion of said anti-slip unit.
2. The shoulder strap as claimed in claim 1, wherein said wing
portion of said anti-slip unit is provided at one side with a loop
tape of a magic tape, and said sleeve portion of said anti-slip
unit is provided at one side with a hook tape of the magic tape
corresponding to said loop tape, such that when said loop tape is
turned toward said sleeve portion to connect to said hook tape, and
said anti-slip unit is bent over said strap unit, said anti-slip
unit is caused to have an outer edge higher than an inner edge
thereof.
3. The shoulder strap as claimed in claim 2, wherein said strap
unit has two opposite end portions extended from two ends of said
sleeve portion of said anti-slip unit, and said two extended
portions of said strap unit could be folded toward said sleeve
portion of the anti-slip unit and held thereto by said hook tape
and loop tape of said magic tape that have been connected to each
other.
4. The shoulder strap as claimed in claim 1, wherein said anti-slip
unit is provided with an anti-slip pad.
5. The shoulder strap as claimed in claim 1, wherein said anti-slip
unit is provided with a cushion pad.
6. The shoulder strap as claimed in claim 1, wherein said strap
unit is provided at two opposite ends with a connector each for
connecting to a load.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a shoulder strap, and more
particularly to a shoulder strap with an anti-slip unit.
BACKGROUND OF THE INVENTION
[0002] Please refer to FIGS. 1 and 2, in which a conventional
shoulder strap 11 having an anti-slip member put thereon is shown.
When the shoulder strap 11 is in use, the anti-slip member 12 works
to prevent the shoulder strap 11 from slipping down the user's
shoulder.
[0003] The anti-slip member is generally made of a soft material
with elasticity, and is slidable relative to the shoulder strap 11.
When the user moves with a heavy load connected to the shoulder
strap 11, the shoulder strap 11 tends to deform and laterally slide
outward in the anti-slip member 12, as shown in FIG. 2. When the
shoulder strap 11 slides down a shoulder, particularly a slanting
shoulder, it generates a relatively small downward component but a
considerably large outward component. While the anti-slip member 12
provides an increased frictional force for the shoulder strap 11,
the increased frictional force is still small due to the small
downward component. In other words, it is still possible the
shoulder strap 11 slips down the user's shoulder when it is in
use.
[0004] Taiwanese New Utility Model Patent Published under No.
M260147 and entitled "Back Anti-slip Pad" discloses an anti-slip
pad fixed to a rear side of a backpack and an inner side of
shoulder straps thereof. The anti-slip pads fixed to the inner side
of the shoulder straps deform in contacting with different areas of
human body so as to increase their bearing and contacting area with
the human body and resistance to move. However, it is found the
anti-slip pads fixed to the shoulder straps of the backpack only
provides an increased frictional force without producing
significant effect in increasing the bearing and contacting area of
the shoulder straps with the user's shoulders. Therefore, the
shoulder straps still tend to slip off the user's shoulders.
[0005] The disadvantages of the conventional shoulder strap are as
follows: [0006] (1) The bearing and contacting area of the shoulder
strap does not significantly increase. [0007] (2) The conventional
shoulder strap produces a relatively small downward component but a
considerably large outward component to very possibly slip down the
user's shoulder.
[0008] It is therefore tried by the inventor to develop an improved
shoulder strap to eliminate the disadvantages existed in the
conventional shoulder straps.
SUMMARY OF THE INVENTION
[0009] A primary object of the present invention is to provide a
shoulder strap that has increased bearing and contact area with a
user's shoulder.
[0010] Another object of the present invention is to provide a
shoulder strap that produces increased downward component.
[0011] A further object of the present invention is to provide a
shoulder strap that produces increased frictional force.
[0012] A still further object of the present invention is to
provide a shoulder strap that does not easily slip down a user's
slanting shoulder.
[0013] A still further object of the present invention is to
provide a shoulder strap that could be folded for easy storage.
[0014] To achieve the above and other objects, the shoulder strap
according to the present invention includes a strap unit and an
anti-slip unit. The anti-slip unit includes a sleeve portion and a
wing portion; and the strap unit is extended through and fitted in
the sleeve portion of the anti-slip unit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The structure and the technical means adopted by the present
invention to achieve the above and other objects can be best
understood by referring to the following detailed description of
the preferred embodiments and the accompanying drawings,
wherein
[0016] FIG. 1 is a perspective view of a conventional shoulder
strap with an anti-slip member;
[0017] FIG. 2 shows the shoulder strap of FIG. 1 in use;
[0018] FIG. 3 is a perspective view of a shoulder strap with an
anti-slip unit according to a first embodiment of the present
invention;
[0019] FIG. 4 shows the shoulder strap of FIG. 3 in use;
[0020] FIG. 5 is a perspective view of a shoulder strap with an
anti-slip unit according to a second embodiment of the present
invention;
[0021] FIG. 6 shows the shoulder strap of FIG. 5 in use; and
[0022] FIG. 7 is a perspective view of a shoulder strap with an
anti-slip unit according to a third embodiment of the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0023] Please refer to FIG. 3 that is a perspective view of a
shoulder strap according to a first embodiment of the present
invention. As shown, the shoulder strap includes a strap unit 21
and an anti-slip unit 22. The anti-slip unit 22 is provided at an
inner side with an anti-slip pad 223, and includes a sleeve portion
221 and a wing portion 222. The strap unit 21 is provided at two
opposite ends with a connector 224 each, such as a spring catch, so
that a user may connect the shoulder strap at two ends to a
load.
[0024] A cushion pad (not shown) may be provided between the sleeve
portion 221 of the anti-slip unit 22 and the strap unit 21 to
reduce the force acted on the user's shoulder at the instant the
strap unit 21 is connected to a load, so that the user's shoulder
is well protected against the discomfort of supporting the shoulder
strap and the load long.
[0025] Please refer to FIG. 4. To use the shoulder strap of the
present invention, the strap unit 21 is extended through and fitted
in the sleeve portion 221 of the anti-slip unit 22. The strap unit
21 with a load connected thereto is supported on the user's
shoulder with the wing portion 222 of the anti-slip unit 22 located
at an outer side of the user's shoulder. As having been mentioned
earlier, when the strap unit 21 is hung on a user's slanting
shoulder and tends to slip down therefrom, there is produced a
relatively small downward component but considerably large outward
component. At this point, the wing portion 222 of the anti-slip
unit 22 located at the outer side of the user's shoulder is in the
direction of the outward component and generates a resistance to
the outward component and increases an overall frictional force of
the anti-slip unit 22 at the instant the anti-slip unit 22 is going
to slip outward, preventing the anti-slip unit 22 from slipping off
the user's shoulder.
[0026] Please refer to FIG. 5, in which a shoulder strap according
to a second embodiment of the present invention is shown. As shown,
the shoulder strap of the second embodiment is generally
structurally similar to the first embodiment, except that a loop
tape 222a of a magic tape is provided on the wing portion 222 of
the anti-slip unit 22, and a hook tape 221a of the magic tape is
provided on the sleeve portion 221 of the anti-slip unit 22
corresponding to the loop tape 222a.
[0027] FIG. 6 shows the use of the shoulder strap of the second
embodiment. As shown, the wing portion 222 with the loop tape 222a
is bent toward the sleeve portion 221 of the anti-slip unit 22. The
strap unit 21 having a load connected thereto is supported on the
user's shoulder with the wing portion 222 of the anti-slip unit 22
located at an outer side of the shoulder. Since the anti-slip unit
22 has an outer edge 222b longer than an inner edge 221b thereof,
the outer edge 222b would have a bending larger than that of the
inner edge 221b when the anti-slip unit 22 is bent over the strap
unit 21. As a result, the outer edge 222b of the anti-slip unit 22
has a thickness larger than that of the inner edge 221b.
[0028] Again, the strap unit 21 is extended through and fitted in
the sleeve portion 221 of the anti-slip unit 22. The strap unit 21
with a load connected thereto is supported on the user's shoulder
with the wing portion 222 of the anti-slip unit 22 located at an
outer side of the shoulder. With the outer edge 222b of the
anti-slip unit 22 being thicker than the inner edge 221b, the strap
unit 21 hung on a slanting shoulder produces an increased downward
component and a reduced outward component to thereby increase an
overall frictional force of the strap unit 21, preventing the same
from slipping down the user's shoulder.
[0029] FIG. 7 shows a shoulder strap according to a third
embodiment of the present invention The third embodiment is
generally structurally similar to the first and the second
embodiment, except that two portions 211 of the strap unit 21
separately extended from two ends of the sleeve portion 221 of the
anti-slip unit 22 could be folded toward the sleeve portion 221 and
held thereto by the hook tape 221a and the loop tape 222a on the
anti-slip unit 22, enabling the shoulder strap to be conveniently
stored.
[0030] The shoulder strap of the present invention is superior to
that of prior art for the following reasons: [0031] 1. The wing
portion of the anti-slip unit of the shoulder strap of the present
invention is extended in the direction of an outward component of
the strap unit, and gives the shoulder strap an increased bearing
and contact area with a user's shoulder. [0032] 2. The loop tape of
the magic tape on the wing portion of the anti-slip unit is turned
toward the sleeve portion to connect to the hook tape of the magic
tape, causing the anti-slip unit bent over the strap unit to have
an outer edge higher than an inner edge thereof, resulting in
increased downward component and frictional force of the shoulder
strap. [0033] 3. The two opposite end portions of the strap unit
can be folded toward the sleeve portion of the anti-slip unit and
held thereto to allow convenient storage of the shoulder strap.
[0034] The present invention has been described with some preferred
embodiments thereof and it is understood that many changes and
modifications in the described embodiments can be carried out
without departing from the scope and the spirit of the invention
that is intended to be limited only by the appended claims.
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