US20130008934A1

US20130008934A1 - Dual shoulder strap side-carrying bag and double shoulder strap harness

Info

Publication number: US20130008934A1
Application number: US13/214,839
Authority: US
Inventors: Kelvin Jordan LIU; Ching-Lan Hsu
Original assignee: Individual
Current assignee: LIU KELVIN JORDAN
Priority date: 2011-07-05
Filing date: 2011-08-22
Publication date: 2013-01-10
Also published as: US20140069977A1; CN202819945U; TWM424061U

Abstract

A dual shoulder strap side-carrying bag includes a bag body, a connection ring coupled to one lateral side of the bag body, and a shoulder strap inserted through the connection ring and connected to the other lateral side of the bag body. The shoulder strap defines a loop structure formed of a first shoulder strap portion and a second shoulder strap portion thereof. When a user carries the dual shoulder strap side-carrying bag, the first shoulder strap portion and the second shoulder strap portion are respectively rested on the user's two shoulders.

Description

BACKGROUND OF THE INVENTION

1. Technical Field
The present invention is related to side-carrying bags and more particularly, to a dual shoulder strap side-carrying bag, which provides a double-shoulder side-carrying function subject to the arrangement of a shoulder stand.
2. Description of the Prior Art
Regular commercial shoulder bags include two types, namely, the back-carrying type and the side-carrying type. A back-carrying type shoulder bag, for example, backpack, has two shoulder straps for enabling the weight of the shoulder bag to be evenly distributed through the user's two shoulders, facilitating carrying heavy items or long-time carrying application.
When using a back-carrying bag, the user will carry the back-carrying bag on the back. When going to pick up a storage item from the back-carrying bag, the user may need to remove the back-carrying bag from the shoulders. In other words, the user cannot easily pick up storage items from the back-carrying bag that is carried on the back.
A side-carrying bag has a single shoulder strap connected to the bag body thereof. By means of the shoulder strap, a user can carry the side-carrying bag on one shoulder. When carrying the side-carrying bag on one shoulder, the user can adjust the position of the bag body to the user's front side, one lateral side or back side conveniently when desired. In other words, the user can pick up storage items from the side-carrying bag easily without removing the side-carrying bag from the shoulder.
However, when using a side-carrying bag, the shoulder bears all the weight of the side-carrying bag. Therefore, a side-carrying bag is not suitable for carrying heavy items or for a long-time application.

SUMMARY OF THE PRESENT INVENTION

It is, therefore, an object of the present invention to provide a dual shoulder strap side-carrying bag, which enables the shoulder strap to be rested on the user's two shoulders when the user carries the dual shoulder strap side-carrying bag, eliminating the drawback of conventional side-carrying bags that are not suitable for carrying heavy items or long period carrying application.
It is another object of the present invention to provide a dual shoulder strap side-carrying bag, which enables the user to access to the storage items in the bag body conveniently when the user is carrying the dual shoulder strap side-carrying bag on the shoulders.
It is still another object of the present invention to provide a dual shoulder strap side-carrying bag, which uses at least one connection ring to connect the shoulder strap to the bag body thereof in such a manner that the shoulder strap defines a first shoulder strap portion and a second shoulder strip portion at two opposite sides relative to the at least one connection ring, and the first shoulder strap portion and the second shoulder strip portion form a loop structure. Thus, the first shoulder strap portion and the second shoulder strip portion are respectively rested on the user's two shoulders when the user carries the dual shoulder strap side-carrying bag. Further, the connection ring is movable along the shoulder strap to change the length of the first shoulder strap portion and the length of the second shoulder strip portion, enhancing the convenience of use.
It is still another object of the present invention to provide a dual shoulder strap side-carrying bag, which uses at least one extension strap and at least one connection ring to connect the shoulder strap to the bag body, allowing adjustment of the center of gravity of the bag body relative to the use so that the user's two shoulders can bear approximately the equal weight, avoiding falling of the shoulder strap from the user's shoulders.
It is still another object of the present invention to provide a dual shoulder strap side-carrying bag, which uses a supplementary strap to connect the shoulder strap and the bag body so that the bag body can be positively kept at the user's one lateral side or back side, facilitating carrying.
To achieve these and other objects of the present invention, the present invention provides a dual shoulder strap side-carrying bag, comprising: a bag body having a first lateral side and a second lateral side; a first connection ring coupled to the first lateral side of the bag body; and a shoulder strap inserted through the first connection ring and connected to the second lateral side of the bag body, the shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to the first connection ring, wherein the first shoulder strap portion and the second shoulder strap portion form a loop structure, and the total length of the shoulder strap is greater than 170 cm.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the shoulder strap has two distal ends thereof connected to the second lateral side of the bag body.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a supplementary strap, the supplementary strap having one end thereof connected to the bag body and an opposite end thereof connected to the shoulder strap.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a second connection ring connecting the shoulder strap to the second lateral side of the bag body.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the shoulder strap has two distal ends thereof connected together and is inserted through the first connection ring and the second connection ring.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a plurality of snap rings coupled to the shoulder strap, wherein the shoulder strap connects to the first connecting ring and the second connecting ring via the snap rings.
To achieve these and other objects of the present invention, the present invention provides another dual shoulder strap side-carrying bag, comprising: a bag body having a first lateral side and a second lateral side; an extension strap connected to the first lateral side of the bag body; a first connection ring coupled to one end of the extension strap; and a shoulder strap inserted through the first connection ring and connected to the second lateral side of the bag body, the shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to the first connection ring, wherein the first shoulder strap portion and the second shoulder strap portion form a loop structure, and the total length of the shoulder strap plus the double of the length of the extension strap are greater than 170 cm.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the shoulder strap has two distal ends thereof connected to the second lateral side of the bag body.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a supplementary strap, the supplementary strap having one end thereof connected to the bag body and an opposite end thereof connected to the shoulder strap.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a second connection ring connecting the shoulder strap to the second lateral side of the bag body.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the shoulder strap has two distal ends thereof connected together and is inserted through the first connection ring and the second connection ring.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a second extension strap connected to the second lateral side of the bag body and the shoulder strap.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, further comprising a second connection ring connected to the second extension strap and the shoulder strap.
To achieve these and other objects of the present invention, the present invention provides another dual shoulder strap side-carrying bag, comprising: a bag body having a first lateral side and a second lateral side; a connection ring coupled to the first lateral side of the bag body; and an adjustable shoulder strap inserted through the connection ring and connected to the second lateral side of the bag body, wherein the adjustable shoulder strap comprises an adjustment slide for allowing adjustment of the length of the adjustable shoulder strap, and the adjustable shoulder strap have a total length greater than 170 cm.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the adjustable shoulder strap has one end thereof connected to the second lateral side of the bag body and an opposite end thereof connected to the adjustable shoulder strap by the adjustment slide.
In one embodiment of aforesaid dual shoulder strap side-carrying bag, wherein the adjustable shoulder strap comprises a loop structure.
To achieve these and other objects of the present invention, the present invention provides a double shoulder strap harness, comprising: an extension strap; a first connection ring connected to one end of the extension strap; and a shoulder strap inserted through the first connection ring, the shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to the first connection ring, wherein the first shoulder strap portion and the second shoulder strap portion form a loop structure, and the combined length of the total length of the shoulder strap and the double of the length of the extension strap is greater than 170 cm.
In one embodiment of aforesaid double shoulder strap harness, further comprising a first snap ring coupled to the extension strap and a second snap ring coupled to the shoulder strap.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective structural view of a dual shoulder strap side-carrying bag in accordance with a first embodiment of the present invention;

FIG. 2 is schematic applied view of the dual shoulder strap side-carrying bag in accordance with the first embodiment of the present invention;

FIG. 3 is a schematic perspective structural view of a dual shoulder strap side-carrying bag in accordance with a second embodiment of the present invention;

FIG. 3A is a schematic exploded structural view of a dual shoulder strap side-carrying bag in accordance with a third embodiment of the present invention;

FIG. 4A is a schematic applied view of a dual shoulder strap side-carrying bag in accordance with a fourth embodiment of the present invention;

FIG. 4B illustrates another application example of the dual shoulder strap side-carrying bag in accordance with the fourth embodiment of the present invention;

FIG. 5 is a schematic perspective structural view of a dual shoulder strap side-carrying bag in accordance with a fifth embodiment of the present invention;

FIG. 6 illustrates an application example of the dual shoulder strap side-carrying bag in accordance with the fifth embodiment of the present invention;

FIG. 7 is a schematic perspective structural view of a dual shoulder strap side-carrying bag in accordance with a sixth embodiment of the present invention;

FIG. 8 is a schematic perspective structural view of a dual shoulder strap side-carrying bag in accordance with a seventh embodiment of the present invention; and

FIG. 9 is an elevational view of a double shoulder strap hardness for dual shoulder strap side-carrying bag in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 1 and 2, a dual shoulder strap side-carrying bag in accordance with a first embodiment of the present invention is shown. The dual shoulder strap side-carrying bag 10 comprises a bag body 11, a first connection ring 131 and a shoulder strap 15. The first connection ring 131 is coupled to a first lateral side 111 of the bag body 11. The shoulder strap 15 is inserted through the first connection ring 131 and connected to a second lateral side 113 of the bag body 11.
The shoulder strap 15 is defined as a first shoulder strap portion 151 and a second shoulder strap portion 153 at two opposite sides relative to the first connection ring 131. The first shoulder strap portion 151 and the second shoulder strap portion 153 form a loop structure 152. Further, the shoulder strap 15 has a total length greater than 170 cm. In this first embodiment, the two distal ends of the shoulder strap 15 are directly connected to the second lateral side 113 of the bag body 11.
When using the dual shoulder strap side-carrying bag 10, as illustrated in FIG. 2, sleeve the loop structure 152 onto the user's head 12 to let the first shoulder strap portion 151 and the second shoulder strap portion 153 be respectively rested on the user's left and right shoulders. When carrying the dual shoulder strap side-carrying bag 10, the total weight of the dual shoulder strap side-carrying bag 10 is evenly distributed through the user's left and right shoulders. Thus, the user can carry the dual shoulder strap side-carrying bag 10 for a long period of time, or use the dual shoulder strap side-carrying bag 10 to carry heavy items.
As the shoulder strap 15 is inserted through the first connection ring 131 and connected to the second lateral side 113 of the bag body 11, the connection ring 131 can be moved along the shoulder strap 15 to adjust the length of the first shoulder strap portion 151 and the length of the second shoulder strap portion 153. In other words, the length of the first shoulder strap portion 151 and the length of the second shoulder strap portion 153 are not fixed, however the total length of the shoulder strap 15 (i.e., the combined length of the first shoulder strap portion 151 and the second shoulder strap portion 153) is fixed.
Further, when carrying the dual shoulder strap side-carrying bag 10, the user 12 can adjust the length of the first shoulder strap portion 151 and the length of the second shoulder strap portion 153 to keep the first shoulder strap portion 151 and the second shoulder strap portion 153 in positive contact with the respective shoulders, enhancing positioning and enabling the total weight of the dual shoulder strap side-carrying bag 10 to be evenly distributed through the left and right shoulders of the user 12.
Further, when carrying the dual shoulder strap side-carrying bag 10, the user 12 can also adjust the relative position of the bag body 11 of the dual shoulder strap side-carrying bag 10 without removing the dual shoulder strap side-carrying bag 10 from the shoulders, for example, the user 12 can adjust the bag body 11 to the user's front side, one lateral side or back side, facilitating access to storage items in the bag body 11 of the dual shoulder strap side-carrying bag 10.
Thus, the dual shoulder strap side-carrying bag 10 has the advantages of conventional side-carrying bags and back-carrying bags, suitable for a long period carrying application and facilitating the user 12 to access to the storage items in the bag body 11.
There is a relationship between the length of the shoulder strap 15 and the body height of the user 12. When the user 12 is carrying the dual shoulder strap side-carrying bag 10, the bag body 11 of the dual shoulder strap side-carrying bag 10 is preferably kept around the waist. In one embodiment of the invention, the optimal length of the shoulder strap 15 is greater than the body height of the user 12.
In a second embodiment of the present invention, as illustrated in FIG. 3, the shoulder strap 15 is coupled to the first lateral side 111 and second lateral side 113 of the bag body 11 by a first connection ring 131 and a second connection ring 133 respectively, and the two distal ends of the shoulder strap 15 are connected together. Further, after insertion through the first connection ring 131 and the second connection ring 133, the shoulder strap 15 can be moved relative to the first connection ring 131 and the second connection ring 133 to adjust the length of the first shoulder strap portion 151 and the length of the second shoulder strap portion 153, facilitating carrying by the user 12.
In a third embodiment of the present invention, as illustrated in FIG. 3A, the shoulder strap 15 is detachably coupled to the bag body 11 by snap rings 16. The shoulder strap 25 is inserted through the first connection ring 231 and connected to the second lateral side 213 of the bag body 21.
The shoulder strap 25 is defined as a first shoulder strap portion 251 and a second shoulder strap portion 253 at two opposite sides relative to the first connection ring 231. The first shoulder strap portion 251 and the second shoulder strap portion 253 form a loop structure 252. In this fifth embodiment, the two distal ends of the shoulder strap 15 are directly connected to the second lateral side 213 of the bag body 21.
When using the dual shoulder strap side-carrying bag 20, sleeve the loop structure 252 onto the user's head 12, as illustrated in FIG. 6, to let the first shoulder strap portion 251 and the second shoulder strap portion 253 to be respectively rested on the user's left and right shoulders. Further, the first connection ring 231 can be moved along the shoulder strap 25 to adjust the length of the first shoulder strap portion 251 and the length of the second shoulder strap portion 253, enabling the first shoulder strap portion 251 and the second shoulder strap portion 253 to be respectively and positively kept in contact with the shoulders of the user 12.
Through the use of the extension strap 29, the user can change the center of gravity of the dual shoulder strap side-carrying bag 20 to balance the pressure applied by the first shoulder strap portion 251 and the second shoulder strap portion 253 to the left and right shoulders of the user 12, avoiding falling of the first shoulder strap portion 251 from the user's shoulder and enhancing the convenience of use of the dual shoulder strap side-carrying bag 20.
In this fifth embodiment, the total length of the shoulder strap 25 (the combined length of the first shoulder strap portion 251 and the second shoulder strap portion 253) is defined to be (a), the length of the extension strap 29 is defined to be (b), wherein a+2b>170 cm, i.e., the combined length of the total length of the shoulder strap 25 and the double of the length of the extension strap 29 is greater than 170 cm.
In an alternate form of this fifth embodiment, the shoulder strap 25 can be connected to the second lateral side 213 of the bag body 21 by means of a second connection ring 133, as illustrated in FIG. 3, and the two distal ends of the shoulder strap 25 can be connected together. Further, the supplementary strap 17 used in the fourth embodiment, as illustrated in FIGS. 4A and 4B, can also be employed to the dual shoulder strap side-carrying bag 20 of this fifth embodiment.
FIG. 7 illustrates a dual shoulder strap side-carrying bag in accordance with a sixth embodiment of the present invention. As illustrated, the dual shoulder strap side-carrying bag 30 comprises a bag body 31, a first connection ring 331, a second connection ring 333, a shoulder strap 35, a first extension strap 391 and a second extension strap 393. The first extension strap 391 has its one end connected to the first lateral side 311 of the bag body 31, and its other end connected to the first connection ring 331. Further, the second extension strap 393 has its one end connected to the second lateral side 313 of the bag body 31, and its other end connected to the second connection ring 333.
The shoulder strap 35 of the dual shoulder strap side-carrying bag 30 is inserted through the first connection ring 331 and the second connection ring 333. Further, shoulder strap 35 is defined as a first shoulder strap portion 351 and a second shoulder strap portion 353 at two opposite sides relative to the first connection ring 331 and the second connection ring 333. The first shoulder strap portion 351 and the second shoulder strap portion 353 form a loop structure 352. Further, the two distal ends of the shoulder strap 35 are connected together so that the shoulder strap 35 can be moved relative to the first connection ring 331 and the second connection ring 333 to adjust the length of the first shoulder strap portion 351 and the length of the second shoulder strap portion 353, facilitating carrying of the dual shoulder strap side-carrying bag 30 by the user 12.
In this sixth embodiment, the total length of the shoulder strap 35 (the combined length of the first shoulder strap portion 351 and the second shoulder strap portion 353) is defined to be (a), the length of the first extension strap 391 is defined to be (b), and the length of the second extension strap 393 is defined to be (c), wherein a+2b+2c>170 cm, i.e., the combined length of the total length of the shoulder strap 35 and the double of the length of the first extension strap 391 and the double of the length of the second extension strap 393 is greater than 170 cm.
In an alternate form of this sixth embodiment, the supplementary strap 17 used in the fourth embodiment, as illustrated in FIGS. 4A and 4B, can also be employed to the employed to the dual shoulder strap side-carrying bag 30 of this sixth embodiment and connected between the bag body 31 and the shoulder strap 35.
FIG. 8 illustrates a dual shoulder strap side-carrying bag in accordance with a seventh embodiment of the present invention. As illustrated, the dual shoulder strap side-carrying bag 40 comprises a bag body 41, a connection ring 43, and an adjustable shoulder strap 45. The connection ring 43 is coupled to the first lateral side 411 of the bag body 41. The length adjustable shoulder strap 45 is inserted through the connection ring 43 and connected to the second lateral side 413 of the bag body 41. Further, the total length of the adjustable shoulder strap 45 is greater than 170 cm.
According to this seventh embodiment, the adjustable shoulder strap 45 has its one end connected to the second lateral side 413 of the bag body 41 and its other end adjustably connected to the adjustable should strap 45 by an adjustment slide 455. For example, the adjustable shoulder strap 45 is defined as a first shoulder strap portion 451 and a second shoulder strap portion 453 at two opposite sides relative to the connection ring 43. The first shoulder strap portion 451, the second shoulder strap portion 453, and the adjustment slide 455 form a loop structure 452. When using the dual shoulder strap side-carrying bag 40, sleeve the loop structure 452 onto the user's head 12 to let the first shoulder strap portion 451 and the second shoulder strap portion 453 be respectively rested on the user's left and right shoulders.
The adjustment slide 455 is movable along the adjustable shoulder strap 45 to adjust the size of the loop structure 452 and the length of the adjustable shoulder strap 45 subject to the body height of the user 12. Further, the connection ring 43 can also be moved along the adjustable shoulder strap 45 to adjust the length of the first shoulder strap portion 451 and the length of the second shoulder strap portion 453, facilitating carrying of the dual shoulder strap side-carrying bag 40 by the user 12.
FIG. 9 illustrates a double shoulder strap harness for dual shoulder strap side-carrying bag in accordance with the present invention. As illustrated, the dual double shoulder strap harness 50 comprises a shoulder strap 55, a first connection ring 531 and an extension strap 59. The extension strap 59 is connected to the first connection ring 531. The shoulder strap 55 is inserted through the first connection ring 531, defining a first shoulder strap portion 551 and a second shoulder strap portion 553 at two opposite sides relative to the first connection ring 531. Further, the first shoulder strap portion 551 and the second shoulder strap portion 553 form a loop structure 552. Further, the combined length of the total length of the shoulder strap 55 and the double of the length of the extension strap 59 is greater than 170 cm.
Further, a first snap ring 561 and a second snap ring 563 are respectively coupled to the extension strap 59 and the shoulder strap 55. Same as the use of the snap rings 16 shown in FIG. 3, the first snap ring 561 and the second snap ring 563 are respectively coupled to the connection rings 131 and 133 at the two opposite lateral sides of the bag body 11. Thus, when the user carries the shoulder bag on the shoulders, the total weight of the bag body 11 is equally distributed through the user's two shoulders.

Claims

1. A dual shoulder strap side-carrying bag, comprising:

a bag body having a first lateral side and a second lateral side;

a first connection ring coupled to said first lateral side of said bag body; and

a shoulder strap inserted through said first connection ring and connected to said second lateral side of said bag body, said shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to said first connection ring, wherein said first shoulder strap portion and said second shoulder strap portion form a loop structure, and the total length of said shoulder strap is greater than 170 cm.

2. The dual shoulder strap side-carrying bag as claimed in claim 1, wherein said shoulder strap has two distal ends thereof connected to said second lateral side of said bag body.

3. The dual shoulder strap side-carrying bag as claimed in claim 1, further comprising a supplementary strap, said supplementary strap having one end thereof connected to said bag body and an opposite end thereof connected to said shoulder strap.

4. The dual shoulder strap side-carrying bag as claimed in claim 1, further comprising a second connection ring connecting said shoulder strap to said second lateral side of said bag body.

5. The dual shoulder strap side-carrying bag as claimed in claim 4, wherein said shoulder strap has two distal ends thereof connected together and is inserted through said first connection ring and said second connection ring.

6. The dual shoulder strap side-carrying bag as claimed in claim 4, further comprising a plurality of snap rings coupled to said shoulder strap, wherein said shoulder strap connects to said first connecting ring and said second connecting ring via said snap rings.

7. A dual shoulder strap side-carrying bag, comprising:

a bag body having a first lateral side and a second lateral side;

an extension strap connected to said first lateral side of said bag body;

a first connection ring coupled to one end of said extension strap; and

a shoulder strap inserted through said first connection ring and connected to said second lateral side of said bag body, said shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to said first connection ring, wherein said first shoulder strap portion and said second shoulder strap portion form a loop structure, and the total length of said shoulder strap plus the double of the length of said extension strap are greater than 170 cm.

8. The dual shoulder strap side-carrying bag as claimed in claim 7, wherein said shoulder strap has two distal ends thereof connected to said second lateral side of said bag body.

9. The dual shoulder strap side-carrying bag as claimed in claim 7, further comprising a supplementary strap, said supplementary strap having one end thereof connected to said bag body and an opposite end thereof connected to said shoulder strap.

10. The dual shoulder strap side-carrying bag as claimed in claim 7, further comprising a second connection ring connecting said shoulder strap to said second lateral side of said bag body.

11. The dual shoulder strap side-carrying bag as claimed in claim 10, wherein said shoulder strap has two distal ends thereof connected together and is inserted through said first connection ring and said second connection ring.

12. The dual shoulder strap side-carrying bag as claimed in claim 7, further comprising a second extension strap connected to said second lateral side of said bag body and said shoulder strap.

13. The dual shoulder strap side-carrying bag as claimed in claim 12, further comprising a second connection ring connected to said second extension strap and said shoulder strap.

14. A dual shoulder strap side-carrying bag, comprising:

a bag body having a first lateral side and a second lateral side;

a connection ring coupled to said first lateral side of said bag body; and

an adjustable shoulder strap inserted through said connection ring and connected to said second lateral side of said bag body, wherein said adjustable shoulder strap comprises an adjustment slide for allowing adjustment of the length of said adjustable shoulder strap, and said adjustable shoulder strap have a total length greater than 170 cm.

15. The dual shoulder strap side-carrying bag as claimed in claim 14, wherein said adjustable shoulder strap has one end thereof connected to said second lateral side of said bag body and an opposite end thereof connected to said adjustable shoulder strap by said adjustment slide.

16. The dual shoulder strap side-carrying bag as claimed in claim 14, wherein said adjustable shoulder strap comprises a loop structure.

17. A double shoulder strap harness, comprising:

an extension strap;

a first connection ring connected to one end of said extension strap; and

a shoulder strap inserted through said first connection ring, said shoulder strap defined as a first shoulder strap portion and a second shoulder strap portion at two opposite sides relative to said first connection ring, wherein said first shoulder strap portion and said second shoulder strap portion form a loop structure, and the combined length of the total length of said shoulder strap and the double of the length of said extension strap is greater than 170 cm.

18. The double shoulder strap harness as claimed in claim 17, further comprising a first snap ring coupled to said extension strap and a second snap ring coupled to said shoulder strap.