Patent Publication Number: US-11647847-B2

Title: Baby carrier

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a baby product and, more particularly, to a baby carrier capable of adjusting a width between two shoulder straps. 
     2. Description of the Prior Art 
     When a conventional forward-carrying baby carrier is used for a long time, the weight of a baby will force the baby carrier forward, thereby causing a larger load on the shoulders of a user. For users with different shoulder widths and different heights, if the baby carrier cannot adjust the position of the shoulder strap to the most suitable position for their shoulder width, the shoulder strap of the baby carrier cannot effectively and evenly distribute the load to two shoulders of the user to reduce the muscle tension or fatigue caused by using the baby carrier for a long time, thereby failing to achieve the purpose of reducing the load on the user. 
     SUMMARY OF THE INVENTION 
     An objective of the invention is to provide a baby carrier capable of being adaptively adjusted according to different shoulder widths of different users, such that the load can be evenly distributed to the shoulders of a user, so as to prevent the user from feeling fatigue too fast. 
     To achieve the aforesaid objective, the invention provides a baby carrier including a carrying assembly and a support sheet connected with the carrying assembly. The carrying assembly includes a waist member and two shoulder straps. A front end of the waist member is connected with a lower portion of the support sheet. An upper portion of a front end of each of the two shoulder straps is connected with an upper portion of the support sheet. A rear end of each of the two shoulder straps is connected with a middle portion of the support sheet. A lower portion of a front end of each of the two shoulder straps forms a circular structure. The circular structure is connected with the waist member. A fixing member is disposed on the front end of the waist member along a length direction. The lower portion of the front end of each of the two shoulder straps is slidably connected with the fixing member. A width between the two shoulder straps is adjusted by a slide of the front end of each of the two shoulder straps on the fixing member. 
     Compared to the prior art, the lower portion of the front end of each shoulder strap of the baby carrier of the invention forms a circular structure, the circular structure is slidably connected with the fixing member disposed on the front end of the waist member along the length direction, and the width between the two shoulder straps is adjusted by the slide of the circular structure of the front end of the shoulder strap on the fixing member. When the shoulder width of the user is wider, the positions of the two shoulder straps need to be adjusted to be further away from each other. At this time, the user may adjust the circular structures of the shoulder straps to slide toward opposite ends of the fixing member to adapt the baby carrier to the user with wider shoulder width. When the shoulder width of the user is narrower, the positions of the two shoulder straps need to be adjusted to be more concentrated with each other. At this time, the user may adjust the circular structures of the shoulder straps to slide toward the middle of the fixing member to adapt the baby carrier to the user with narrower shoulder width. When using the baby carrier of the invention, users can perform adaptive adjustment conveniently and quickly according to their own different shoulder widths, such that the load can be evenly distributed to the shoulders of the user and the user can keep an optimal posture of using the baby carrier, so as to prevent the user from feeling fatigue too fast. 
     Preferably, the circular structure is slidably sleeved on the fixing member. 
     Preferably, the lower portion of the front end of the shoulder strap is rolled and stitched to form the circular structure. 
     Preferably, the fixing member comprises a sliding member and a connecting plate fixedly connected with the front end of the waist member, and the sliding member is slidably connected with the connecting plate. 
     Preferably, an upper end of the sliding member forms a through hole for the circular structure to pass through. 
     Preferably, a lower end of the sliding member is recessed to form a sliding groove, the connecting plate has a sliding rail matched with the sliding groove, and the sliding member is slidably connected with the connecting plate by a slide of the sliding groove on the sliding rail. 
     Preferably, the connecting plate has a positioning hole and a lower end of the sliding member has a positioning protrusion matched with the positioning hole. 
     Preferably, the fixing member is a webbing structure. 
     Preferably, a middle segment of the fixing member is fixedly connected with a middle segment of the front end of the waist member and two circular structures of the two shoulder straps are respectively located at opposite sides of the middle segment of the fixing member. 
     Preferably, the middle segment of the fixing member is located at an inner side of the middle segment of the waist member. Since the fixing member is disposed at the inner side of the waist member, the middle segment of the fixing member and the circular structure are covered and hidden by the waist member, such that the appearance is simple. At the same time, when the baby carrier is used, the waist of the user is restrained by the waist member, such that the circular structure of the shoulder strap can be further stably restrained at the position of the adjusted fixing member, thereby preventing the circular structure from sliding on the fixing member due to waist-bending or body-tilt of the user. Accordingly, after the shoulder straps of the invention are adjusted, the width between the shoulder straps will not change due to the posture variation of the user. 
     Preferably, opposite ends of the fixing member respectively pass through opposite ends of the waist member. The slide of the circular structure is restrained between the fixed connection of the middle segments of the fixing member and the waist member and the intersection of the fixing member and the waist member, such that the circular structure will not slide excessively toward opposite ends of the fixing member, so as to prevent the shoulder strap from slipping off. 
     Preferably, the opposite ends of the fixing member respectively and slidably pass through the opposite ends of the waist member. Since the opposite ends of the fixing member respectively and slidably pass through the opposite ends of the waist member, the waist member and the fixing member will cross each other. When the fixing member is located at the inner side of the waist member, the middle segment of the fixing member and the circular structure of the shoulder strap are covered and hidden by the waist member. When the baby carrier is used, the waist member needs to be tightly tied to the waist of the user, such that the position of the circular structure after width adjustment is stably compressed and positioned between the waist member and the abdomen of the user, so as to prevent the adjusted shoulder strap from sliding during use. 
     Preferably, the opposite ends of the fixing member respectively pass through the opposite ends of the waist member and a portion of the fixing member passing through the waist member is fixedly stitched. Since the opposite ends of the fixing member respectively pass through the opposite ends of the waist member, the circular structure can be assembled on the fixing member conveniently. Since the portion of the fixing member passing through the waist member is fixedly stitched, the invention can improve the firmness and stability of the fixing member, prevent the fixing member from deforming, and ensure that the circular structure slides smoothly on the fixing member, thereby enabling the shoulder strap to be adjusted smoothly and conveniently. 
     Preferably, the opposite ends of the fixing member are detachably connected with each other by a first fastener in an engagement manner and a length of the first fastener is adjustable. 
     Preferably, the circular structure is detachably connected with the waist member. 
     Preferably, the circular structure is detachably connected with the waist member by one of Velcro, buckle and snap button. 
     Preferably, the two shoulder straps are arranged in parallel. 
     Preferably, the two shoulder straps are detachably connected with each other by a plug-in buckle in an engagement manner and a length of the plug-in buckle is adjustable. 
     Preferably, the two shoulder straps are arranged in a cross manner. The cross arrangement not only well distributes the load from the shoulders to the back of the user, but also effectively prevents the shoulder straps from slipping off. Accordingly, the invention improves the stability and firmness of the forward-carrying baby carrier and ensures that the baby is kept at a more stable position, thereby ensuring the safety of the baby. 
     Preferably, the baby carrier further comprises a shoulder strap fixing member, the two shoulder straps slidably pass through the shoulder strap fixing member in the cross manner, the two shoulder straps are arranged in the cross manner by the shoulder strap fixing member, a cross position between the two shoulder straps are adjusted by a slide of the shoulder strap fixing member. The users with different shoulder widths and different heights can perform adaptive adjustment for the cross position between the two shoulder straps according to their own practical conditions, such that the cross position between the two shoulder straps can be adjusted and fixed at a load-bearing position suitable for the their own conditions. Consequently, the load can be evenly distributed to the shoulder, back and waist of the user to reduce the load on the shoulder of the user and prevent the user from feeling fatigue too fast. 
     Preferably, the shoulder strap fixing member has two channels crossing each other for the two shoulder straps to slidably pass through, and the two shoulder straps correspondingly pass through the two channels in the cross manner. 
     Preferably, the shoulder strap fixing member is a hollow structure, the shoulder strap fixing member has a plurality of ports penetrating through the hollow structure on two cross directions, and two of the ports opposite to each other allow the same shoulder strap to pass through. 
     Preferably, the shoulder strap fixing member is a diamond structure. 
     Preferably, the shoulder strap fixing member is a ring-shaped structure. 
     Preferably, the ring-shaped structure is divided into four ports and each of the ports forms a skidproof hook extending inward. The skidproof hook prevents the two shoulder straps from sliding with respect to each other on the shoulder strap fixing member and further fixes the cross position between the two shoulder straps, so as to improve the stability of the baby carrier. 
     Preferably, a cross angle formed between the two shoulder straps at the ring-shaped structure is 90°. Accordingly, when the baby carrier is used, the two shoulder straps will be closer to the shoulder blades, so as to reduce the concentration of force and enable the user to feel comfort. 
     Preferably, the upper portion of the support sheet and the upper portions of the front ends of the two shoulder straps are detachable structures. 
     Preferably, the upper portion of the front end of the shoulder strap is detachably connected with the upper portion of the support sheet by a second fastener in an engagement manner and a length of the second fastener is adjustable. By means of the second fastener, the user can conveniently and quickly detach the upper portion of the support sheet from the upper portions of the front ends of the two shoulder straps. The user only needs to hold the baby in front of the body, wraps the baby with the support sheet, and then closes the second fastener. The whole operation of carrying the baby can be completed by a single person. 
     Preferably, the shoulder strap is a length-adjustable structure. The users with different shoulder widths and different heights can perform adaptive adjustment for the length of the shoulder strap according to their own practical conditions, so as to achieve an optimal posture. 
     Preferably, the rear end of the shoulder strap is detachably connected with the middle portion of the support sheet by a third fastener in an engagement manner and a length of the third fastener is adjustable. 
     Preferably, the rear end of the shoulder strap is fixedly connected with the middle portion of the support sheet. 
     Preferably, the rear end of the shoulder strap is a webbing structure, the middle portion of the support sheet is connected with another webbing structure, the webbing structure of the rear end of the shoulder strap is fixedly connected with the another webbing structure of the middle portion of the support sheet by a buckle. 
     Preferably, the shoulder strap has a wing portion extending outward and the wing portion has an expanding position and a folding position with respect to the shoulder strap. When the wing portion is located at the expanding position, the contact area between the shoulder strap and the shoulder of the user increases, so as to reduce the concentration of force and improve the comfort of use. When the wing portion is located at the folding position, the wing portion is folded inward and stored between the shoulder strap and the shoulder of the user, so as to keep the appearance simple and beautiful. 
     These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic rear view illustrating a baby carrier of the invention in an expanded state. 
         FIG.  2    is a schematic front view illustrating the structure of the baby carrier of the invention worn by a user. 
         FIG.  3    is a schematic rear view illustrating the structure of the baby carrier of the invention worn by the user. 
         FIG.  4    is a schematic view illustrating two shoulder straps of the baby carrier of the invention located at first positions. 
         FIG.  5    is a schematic view illustrating the two shoulder straps of the baby carrier of the invention located at second positions. 
         FIG.  6    is a schematic view illustrating a shoulder strap of a baby carrier of a second embodiment of the invention located at first positions. 
         FIG.  7    is a schematic view illustrating the shoulder strap of the baby carrier of the second embodiment of the invention located at second positions. 
         FIG.  8    is a schematic assembly view illustrating the structure of a fixing member of the second embodiment of the invention. 
         FIG.  9    is a schematic exploded view illustrating the structure of the fixing member of the second embodiment of the invention. 
         FIG.  10    is a schematic rear view illustrating the structure of a shoulder strap of the baby carrier of the second embodiment of the invention. 
         FIG.  11    is a schematic side view illustrating the structure of the shoulder strap of the baby carrier of the second embodiment of the invention. 
         FIG.  12    is a schematic perspective view illustrating the structure of a shoulder strap fixing member of the second embodiment of the invention. 
         FIG.  13    is a schematic sectional view illustrating the structure of the shoulder strap fixing member of the second embodiment of the invention. 
         FIG.  14    is a schematic view illustrating the structure of a shoulder strap fixing member of a third embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     In order to explain the disclosure and structural features in detail, the invention will be further described with the embodiments and drawings in the following. 
     As shown in  FIGS.  1  to  5   , a baby carrier  100  of the invention comprises a carrying assembly  1  capable of being worn by a user  101  and a support sheet  2  connected with the carrying assembly  1  for carrying a baby. In general, the support sheet  2  may be made of flexible materials, such as fabrics, especially breathable fabrics, skin-friendly fabrics, etc., so as to enhance the comfort of the baby. The carrying assembly  1  comprises a waist member  12  configured to be tied to the waist of the user  101  and two shoulder straps  11  configured to be tied to the shoulders of the user  101 . It should be noted that the “front end” mentioned in the invention refers to the front side of the user  101 , and the “rear end” mentioned in the invention refers to the back side of the user  101 . A front end of the waist member  12  is connected with a lower portion of the support sheet  2 . An upper portion of a front end of each of the two shoulder straps  11  is connected with an upper portion of the support sheet  2 . A rear end of each of the two shoulder straps  11  is connected with a middle portion of the support sheet  2 . A lower portion of a front end of each of the two shoulder straps  11  forms a circular structure  111 . The circular structure  111  is connected with the waist member  12 . Specifically, a fixing member  121  is disposed on the front end of the waist member  12  along a length direction, the lower portion of the front end of each of the two shoulder straps  11  is slidably connected with the fixing member  121 , and a width between the two shoulder straps  11  is adjusted by a slide of the front end of each of the two shoulder straps  11  on the fixing member  121 . Specifically, the lower portion of the front end of the shoulder strap  11  forms the circular structure  111 , the circular structure  111  is slidably sleeved on the fixing member  121 , and the lower portion of the front end of the shoulder strap  11  is rolled and stitched to form the circular structure  111 . Specifically, the circular structure  111  is detachably connected with the waist member  12 . More specifically, the circular structure  111  is detachably connected with the waist member  12  by Velcro  50 . Needless to say, the circular structure  111  may also be detachably connected with the waist member  12  by buckle, snap button or the like, and the invention is not so limited. In the first embodiment, the fixing member  121  is a webbing structure. Specifically, a middle segment of the fixing member  121  is fixedly connected with a middle segment of the front end of the waist member  12  and two circular structures  111  are respectively located at opposite sides of the middle segment of the fixing member  121 . More specifically, the middle segment of the fixing member  121  is located at an inner side of the middle segment of the waist member  12 . Since the fixing member  121  is disposed at the inner side of the waist member  12 , the middle segment of the fixing member  121  and the circular structure  111  are covered and hidden by the waist member  12 , such that the appearance is simple. At the same time, when the baby carrier  100  is used, the waist of the user is restrained by the waist member  12 , such that the circular structure  111  of the shoulder strap  11  can be further stably restrained at the position of the adjusted fixing member  121 , thereby preventing the circular structure  111  from sliding on the fixing member  121  due to waist-bending or body-tilt of the user  101 . Accordingly, after the shoulder straps  11  of the invention are adjusted, the width between the shoulder straps  11  will not change due to the posture variation of the user  101 . Specifically, opposite ends of the fixing member  121  respectively pass through opposite ends of the waist member  12 . More specifically, the opposite ends of the fixing member  121  respectively and slidably pass through the opposite ends of the waist member  12 . The slide of the circular structure  111  is restrained between the fixed connection of the middle segments of the fixing member  121  and the waist member  12  and the intersection of the fixing member  121  and the waist member  12 , such that the circular structure  111  will not slide excessively toward opposite ends of the fixing member  121 , so as to prevent the shoulder strap  11  from slipping off. Furthermore, since the opposite ends of the fixing member  121  respectively and slidably pass through the opposite ends of the waist member  12 , the waist member  12  and the fixing member  121  will cross each other. When the fixing member  121  is located at the inner side of the waist member  12 , the middle segment of the fixing member  121  and the circular structure  111  of the shoulder strap  11  are covered and hidden by the waist member  12 . When the baby carrier  100  is used, the waist member  12  needs to be tightly tied to the waist of the user  101 , such that the position of the circular structure  111  after width adjustment is stably compressed and positioned between the waist member  12  and the abdomen of the user  101 , so as to prevent the adjusted shoulder strap  11  from sliding during use. More specifically, after the opposite ends of the fixing member  121  respectively pass through the opposite ends of the waist member  12 , a portion of the fixing member  121  passing through the waist member  12  is fixedly stitched. Since the opposite ends of the fixing member  121  respectively pass through the opposite ends of the waist member  12 , the circular structure  111  can be assembled on the fixing member  121  conveniently. Since the portion of the fixing member  121  passing through the waist member  12  is fixedly stitched, the invention can improve the firmness and stability of the fixing member  121 , prevent the fixing member  121  from deforming, and ensure that the circular structure  111  slides smoothly on the fixing member  121 , thereby enabling the shoulder strap  11  to be adjusted smoothly and conveniently. More specifically, the opposite ends of the fixing member  121  are detachably connected with each other by a first fastener  41  in an engagement manner and a length of the first fastener  41  is adjustable. Specifically, the first fastener  41  comprises a male buckle  41   a  and a female buckle  41   b  engaged with the male buckle  41   a . The opposite ends of the fixing member  121  are respectively connected with the male buckle  41   a  and the female buckle  41   b . There is a buckle  44  connected with the bottom of the male buckle  41   a  (the buckle  44  is a common buckle for adjusting a length of a webbing). The opposite ends of the fixing member  121  may be detachably connected with each other by the engagement between the male buckle  41   a  and the female buckle  41   b . Preferably, the buckle  44  may be connected with a webbing structure  45 , such that a connecting length of the fixing member  121  may be adjusted by a slide of the buckle  44  on the webbing  45 . 
     As shown in  FIG.  2   , the upper portion of the support sheet  2  and the upper portions of the front ends of the two shoulder straps  11  are detachable structures. More specifically, the upper portion of the front end of the shoulder strap  11  is detachably connected with the upper portion of the support sheet  2  by a second fastener  42  in an engagement manner and a length of the second fastener  42  is adjustable. The second fastener  42  comprises a male buckle  42   a  and a female buckle  42   b  engaged with the male buckle  42   a . Opposite ends of the upper portion of the support sheet  2  are respectively connected with the male buckle  42   a . There is a buckle  44  connected with the bottom of the male buckle  42   a . The female buckle  42   b  engaged with the male buckle  42   a  is fixed on the upper portion of the front end of the shoulder strap  11 . The upper portion of the support sheet  2  may be detachably connected with the upper portions of the front ends of the two shoulder straps  11  by the engagement between the male buckle  42   a  and the female buckle  42   b . Preferably, a connecting length between the upper portion of the support sheet  2  and the upper portion of the front end of the shoulder strap  11  may be adjusted by a slide of the buckle  44  on the webbing  45 . By means of the second fastener  42 , the user  101  can conveniently and quickly detach the upper portion of the support sheet  2  from the upper portions of the front ends of the two shoulder straps  11 . The user  101  only needs to hold the baby in front of the body, wraps the baby with the support sheet  2 , and then closes the second fastener  42 . The whole operation of carrying the baby can be completed by a single person. Specifically, in the first embodiment, the rear end of the shoulder strap  11  is detachably connected with the middle portion of the support sheet  2  by a third fastener  43  in an engagement manner and a length of the third fastener  43  is adjustable. The third fastener  43  comprises a male buckle  43   a  and a female buckle  43   b  engaged with the male buckle  43   a . The rear end of each shoulder strap  11  is connected with the male buckle  43   a  by a buckle  44 . A length of the shoulder strap  11  is adjusted by a slide of the buckle  44  on the webbing structure  45 . The female buckle  43   b  engaged with the male buckle  43   a  is fixed at opposite sides of the middle portion of the support sheet  2 . The rear end of the shoulder strap  11  may be detachably connected with the middle portion of the support sheet  2  by the engagement between the male buckle  43   a  and the female buckle  43   b.    
     As shown in  FIG.  3   , the two shoulder straps  11  are arranged in a cross manner at a back of the user  101 . The cross arrangement not only well distributes the load from the shoulders to the back of the user  101 , but also effectively prevents the shoulder straps  11  from slipping off. Accordingly, the invention improves the stability and firmness of the forward-carrying baby carrier and ensures that the baby is kept at a more stable position, thereby ensuring the safety of the baby. More specifically, the baby carrier  100  further comprises a shoulder strap fixing member  3 . The shoulder strap fixing member  3  of the first embodiment is a diamond structure. The two shoulder straps  11  slidably pass through the shoulder strap fixing member  3  in the cross manner. The two shoulder straps  11  are arranged in the cross manner at the back of the user  101  by the shoulder strap fixing member  3 . A cross position between the two shoulder straps  11  are adjusted by a slide of the shoulder strap fixing member  3 . The users  101  with different shoulder widths and different heights can perform adaptive adjustment for the cross position between the two shoulder straps  11  according to their own practical conditions, such that the cross position between the two shoulder straps  11  can be adjusted and fixed at a load-bearing position suitable for the their own conditions. Consequently, the load can be evenly distributed to the shoulder, back and waist of the user  101  to reduce the load on the shoulder of the user  101  and prevent the user  101  from feeling fatigue too fast. More specifically, the shoulder strap fixing member  3  has two channels crossing each other for the two shoulder straps  11  to slidably pass through, and the two shoulder straps  11  correspondingly pass through the two channels in the cross manner. More specifically, the shoulder strap fixing member  3  is a hollow structure. The shoulder strap fixing member  3  has four ports penetrating through the hollow structure on two cross directions. The four ports consist of a first port  31 , a second port  32 , a third port  33  and a fourth port  34 , wherein the first port  31  is opposite to the second port  32 , the third port  33  is opposite to the fourth port  34 , and two of the ports opposite to each other allow the same shoulder strap  11  to pass through. 
     Specifically, the shoulder strap  11  is a length-adjustable structure. The users  101  with different shoulder widths and different heights can perform adaptive adjustment for the length of the shoulder strap  11  according to their own practical conditions, so as to achieve an optimal posture. In another embodiment (not shown), the two shoulder straps  11  may be further arranged in parallel at the back of the user  101 . More specifically, the two shoulder straps  11  are detachably connected with each other by a plug-in buckle in an engagement manner and a length of the plug-in buckle is adjustable. However, the detachable connection between the two shoulder straps  11  is not limited to the aforesaid manner. 
     As shown in  FIGS.  4  and  5   , when the baby carrier  100  is used, the circular structure  111  needs to be adjusted to a position suitable for the shoulder width of the user  101 . When the shoulder width of the user  101  is narrower, the positions of the two shoulder straps  11  need to be adjusted to be more concentrated with each other. At this time, the user may adjust the circular structures  111  of the shoulder straps  11  to slide toward the middle of the fixing member  121 , such that the shoulder straps  11  are located at first positions shown in  FIG.  4   , so as to adapt the baby carrier  100  to the user  101  with narrower shoulder width. When the shoulder width of the user  100  is wider, the positions of the two shoulder straps  11  need to be adjusted to be further away from each other. At this time, the user  101  may adjust the circular structures  111  of the shoulder straps  11  to slide toward opposite ends of the fixing member  121 , such that the shoulder straps  11  are located at second positions shown in  FIG.  5   , so as to adapt the baby carrier  100  to the user  101  with wider shoulder width. After adjusting the shoulder straps  11  to the suitable positions, the circular structures  111  are fixedly connected with the waist member  12  by Velcro  50  and the waist member  12  is tied to the waist of the user  101 , such that the position of the circular structure  111  after width adjustment is stably compressed and positioned between the waist member  12  and the abdomen of the user  101 . Then, the opposite ends of the fixing member  121  are engaged with each other by the first fastener  41 . Then, the user  101  holds the baby in front of the body and wraps the baby with the support sheet  2 . Then, the upper portions of the front ends of the shoulder straps  11  are engaged with the upper portion of the support sheet  2  by the second fastener  42 , and the rear ends of the shoulder straps  11  are engaged with the middle portion of the support sheet  2  by the third fastener  43 . Consequently, the whole operation of carrying the baby can be completed by a single person. 
     As shown in  FIGS.  6  to  9   , the fixing member  121 ′ of the second embodiment comprises a sliding member  60  and a connecting plate  70  fixedly connected with the front end of the waist member  12 , and the sliding member  60  is slidably connected with the connecting plate  70 . An upper end of the sliding member  60  forms a through hole  63  for the circular structure  111  to pass through. A lower end of the sliding member  60  is recessed to form a sliding groove  61 . The connecting plate  70  has a sliding rail  71  matched with the sliding groove  61 . The sliding member  60  is slidably connected with the connecting plate  70  by a slide of the sliding groove  61  on the sliding rail  71 . The connecting plate  70  has a positioning hole  72  and a lower end of the sliding member  60  has a positioning protrusion  62  matched with the positioning hole  72 . 
     As shown in  FIGS.  10  and  11   , in the second embodiment, the rear end of the shoulder strap  11  is fixedly connected with the middle portion of the support sheet  2 . More specifically, the rear end of the shoulder strap  11  is a webbing structure  45 , the middle portion of the support sheet  2  is connected with another webbing structure  45 , the webbing structure  45  of the rear end of the shoulder strap  11  is fixedly connected with the another webbing structure  45  of the middle portion of the support sheet  2  by a buckle  44 . Specifically, the shoulder strap  11  has a wing portion  112  extending outward and corresponding to a shoulder of the user  101 . The wing portion  112  has an expanding position and a folding position with respect to the shoulder strap  11 . When the wing portion  112  is located at the expanding position, the contact area between the shoulder strap  11  and the shoulder of the user  101  increases, so as to reduce the concentration of force and improve the comfort of use. When the wing portion  112  is located at the folding position, the wing portion  112  is folded inward and stored between the shoulder strap  11  and the shoulder of the user  101 , so as to keep the appearance simple and beautiful. 
     As shown in  FIGS.  12  and  13   , the shoulder strap fixing member  3 ′ of the second embodiment is a ring-shaped structure. The ring-shaped structure is divided into four ports consisting of a first port  31 ′, a second port  32 ′, a third port  33 ′ and a fourth port  34 ′, wherein the first port  31 ′ is opposite to the second port  32 ′, the third port  33 ′ is opposite to the fourth port  34 ′, and two of the ports opposite to each other allow the same shoulder strap  11  to pass through. As shown in  FIG.  14   , each of the ports of the shoulder strap fixing member  3 ″ of the third embodiment forms a skidproof hook  35  extending inward. The skidproof hook  35  prevents the two shoulder straps  11  from sliding with respect to each other on the shoulder strap fixing member  3 ″ and further fixes the cross position between the two shoulder straps  11 , so as to improve the stability of the baby carrier  100 . Specifically, a cross angle α formed between the two shoulder straps  11  at the ring-shaped structure is 90°. Accordingly, when the baby carrier  100  is used, the two shoulder straps  11  will be closer to the shoulder blades, so as to reduce the concentration of force and enable the user  101  to feel comfort. 
     As shown in  FIGS.  1  to  14   , compared to the prior art, the lower portion of the front end of each shoulder strap  11  of the baby carrier  100  of the invention forms a circular structure  111 , the circular structure  111  is slidably connected with the fixing member  121  disposed on the front end of the waist member  12  along the length direction, and the width between the two shoulder straps  11  is adjusted by the slide of the circular structure  111  of the front end of the shoulder strap  11  on the fixing member  121 . When the shoulder width of the user  101  is wider, the positions of the two shoulder straps  11  need to be adjusted to be further away from each other. At this time, the user  101  may adjust the circular structures  111  of the shoulder straps  11  to slide toward opposite ends of the fixing member  121  to adapt the baby carrier  100  to the user with wider shoulder width. When the shoulder width of the user  101  is narrower, the positions of the two shoulder straps  11  need to be adjusted to be more concentrated with each other. At this time, the user  101  may adjust the circular structures  111  of the shoulder straps  11  to slide toward the middle of the fixing member  121  to adapt the baby carrier  100  to the user  101  with narrower shoulder width. When using the baby carrier  100  of the invention, users can perform adaptive adjustment conveniently and quickly according to their own different shoulder widths, such that the load can be evenly distributed to the shoulders of the user  101  and the user  101  can keep an optimal posture of using the baby carrier  100 , so as to prevent the user  101  from feeling fatigue too fast. At the same time, the slide of the circular structure  111  is restrained between the fixed connection of the middle segments of the fixing member  121  and the waist member  12  and the intersection of the fixing member  121  and the waist member  12 , such that the circular structure  111  will not slide excessively toward opposite ends of the fixing member  121 , so as to prevent the shoulder strap  11  from slipping off. Furthermore, since the opposite ends of the fixing member  121  respectively and slidably pass through the opposite ends of the waist member  12 , the waist member  12  and the fixing member  121  will cross each other. When the fixing member  121  is located at the inner side of the waist member  12 , the middle segment of the fixing member  121  and the circular structure  111  of the shoulder strap  11  are covered and hidden by the waist member  12 . When the baby carrier  100  is used, the waist member  12  needs to be tightly tied to the waist of the user  101 , such that the position of the circular structure  111  after width adjustment is stably compressed and positioned between the waist member  12  and the abdomen of the user  101 , so as to prevent the adjusted shoulder strap  11  from sliding during use. The position of the shoulder strap  11  of the baby carrier  100  of the invention can be adjusted conveniently and quickly, the operation is easy, and the baby carrier  100  of the invention is suitable for the users with different shoulder widths. The baby carrier  100  of the invention is more flexible in use and suitable for widespread use. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.