FR3072865A1 - PECTORAL STRAP - Google Patents

Abstract

Adjusting system (1) for the spacing between the front portion (211) of a first shoulder strap (21) of a backpack (2) and the front portion (221) of a second shoulder strap (22) of the backpack, the adjusting system comprising: - an upper link (101) delimited by a first (1011) and second ends (1012), - a lower link (102) delimited by a first (1021) and second ends (1022) ), a first attachment element (11) intended to be fixed on a shoulder strap (21, 22), the first attachment element being secured to the upper link at its first end, - a second attachment element ( 12) intended to be fixed on a shoulder strap (21, 22), the second attachment element being secured to the lower link at its second end, - a third attachment element (13) intended to be fixed on the first strap (21), the third attachment element being secured to the upper link, close to its s end end, the third attachment element comprising a first adjusting device (1321) for adjusting the relative position of the connection between the upper link and the third attachment element. The lower link cooperates with a second adjusting device (1322) provided on the third attachment element, close to the first end of the lower link, the second adjusting device for adjusting the relative position of the link between the lower link and the third attachment element.

Description

Chest strap

The present invention relates to a backpack, in particular a backpack for a sporting practice such as hiking or running, in particular in the mountains. This backpack is intended in particular for athletes, such as hikers, runners, mountaineers or followers of orienteering, climbing or cycling. Within the meaning of the invention, a backpack is a carrying item provided with two straps fixed on a back panel and with one or more pockets, anterior (s) or dorsal (s). The shoulder straps can comprise several elements assembled via an adjustment loop or they can constitute a continuous panel with the back panel so as to form a bolero type structure. The invention also relates to sleek backpacks, lacking back pocket.

Most backpacks include a simple chest strap connecting the anterior part of each strap respectively. Generally, the chest strap comprises a band, often elastic, one end of which is fixed to a first strap and the other end is fixed to the second strap. The chest strap includes means for changing the length of the strap between the two attachment points of the suspenders. This function is important because it allows the shoulder straps to be positioned transversely so as to greatly improve the carrying comfort of the backpack. The chest strap also includes means for splitting the band in half or detaching one end of the band from a shoulder strap to facilitate placement of the backpack.

In recent years, the Salomon © company has marketed backpack models comprising two identical independent tightening systems, one at the chest and the other between the sternum and the belly. Each tightening system consists of an elastic band, a first hooking element intended to be fixed on a first strap, the first hooking element being secured to the elastic band at its first end, d '' a second attachment element intended to be fixed on a second strap, the second attachment element forming a loop for the elastic band, and a third attachment element intended to be fixed on the first strap, the third attachment element being integral with the elastic band at its second end, the third attachment element comprising an adjustment device making it possible to adjust the position of the connection between the elastic band and the third attachment element. Thus, each elastic band forms an inclined "V", the point of which is located at the level of the second attachment element.

These two tightening systems allow the straps to be properly wedged against the body and, consequently, ensure excellent support of the backpack against the body when the user is moving and more particularly when running. When practicing running, the runner may wish to quickly and simply adjust the positioning of the straps against his chest. The double clamping system is not optimal in terms of speed because the user must act on two independent adjustment devices and distant from each other. In addition, these adjustment systems are located in an area close to the user's field of vision, which does not make it easy to grasp an operating member. Thus, in this zone, finding two actuators and manipulating them makes the adjustment operation inconvenient.

The object of the invention is to provide an improved system for adjusting the spacing between the front part of a first strap of a backpack and the front part of a second strap of the backpack.

One goal is in particular to propose a simple and easy to handle adjustment system.

Another object is to allow rapid adjustment of the spacing between the front part of a first strap of a backpack and the front part of a second strap of the backpack.

The invention provides a system for adjusting the distance between the front part of a first strap of a backpack and the front part of a second strap of the backpack, the adjustment system comprising:

an upper link delimited by a first and second ends, a lower link delimited by a first and second ends, a first attachment element intended to be fixed on a strap, the first attachment element being integral with the upper link at the level of its first end, a second attachment element intended to be fixed on a strap, the second attachment element being integral with the lower link at its second end, a third attachment element intended to be attached to the first strap , the third attachment element being integral with the upper link, close to its second end, the third attachment element comprising a first adjustment device making it possible to adjust the relative position of the connection between the upper link and the third element d 'grip.

The adjustment system is characterized by the fact that the lower link cooperates with a second adjustment device formed on the third attachment element, at the level of the first end of the lower link, the second adjustment device making it possible to adjust the position of the link between the lower link and the third hook.

This particular construction makes it possible to group the two adjustment devices at the level of the third attachment element. Thus, due to the proximity of the operating members of the two adjustment devices, this greatly facilitates the gripping thereof. This advantage is all the more marked when the adjustment devices are located in an hardly appreciable zone of the field of vision. In addition, this rapprochement makes it possible to envisage the simultaneous actuation of the adjustment devices with a single simple and intuitive gesture.

According to advantageous but not compulsory aspects of the invention, such an adjustment system can incorporate one or more of the following characteristics, taken in any technically admissible combination:

- The adjustment system comprises a fourth attachment element intended to be fixed on the second strap, the fourth attachment element forming a loop for the upper link, and / or, a fifth attachment element intended to be fixed on the second strap, the fifth attachment element forming a loop for the lower link,

the fourth attachment element comprises a guide element designed to receive, in a removable manner, a portion of the upper link and / or in that the fifth attachment element comprises a guide element designed to receive, in a removable manner, a portion of the lower link.

the upper link and the lower link form a single continuous link, the second end of the upper link constituting the first end of the lower link,

- the adjustment system comprises a gripping means secured to the continuous link, at a loop formed by the continuous link between the first adjustment device and the second adjustment device,

- the lower link and / or the upper link are elastic,

- the lower link and / or the upper link are cords,

- The first adjustment device and the second adjustment device form a single blocker comprising two jaws between which pass the upper link and the lower link, the two jaws being movable relative to each other so that, when the jaws are close together, the upper link and the lower link are wedged between the two jaws and, when the jaws are distant, the upper link and the lower link are free to slide inside the single blocker,

- the single blocker comprises an elastic means allowing the jaws to be brought together and in that the jaws are designed so that an action on a link in one direction keeps the jaws away while an action in the other direction keeps the clamps jaws.

The invention also relates to a backpack comprising an adjustment system as described above.

Other characteristics and advantages of the invention will be better understood with the aid of the description which will follow, with reference to the appended drawings illustrating, according to non-limiting embodiments, how the invention can be implemented, and in which :

Figure 1 is a front view of an adjustment system according to a first embodiment of the invention;

Figure 2 is a front view of a backpack equipped with the adjustment system of Figure 1, the backpack being in a configuration for which the adjustment system is inoperative;

Figure 3 is a front view of the backpack of Figure 2 in a configuration for which the adjustment system is operating;

Figures 4 to 6 are respectively a perspective view, a top view and a side view, of a first type of attachment element of the adjustment system;

Figures 7 to 9 are respectively a perspective view, a top view and a side view of a second type of attachment element of the adjustment system;

Figure 10 is a sectional view of a first embodiment of an adjustment device of the adjustment system;

Figures 11 to 13 are respectively a top view and sectional views in thickness showing different configurations of a second embodiment of an adjustment device of the adjustment system;

Figures 14 to 16 are respectively a top view and sectional views along XV-XV of Figure 14 showing different configurations of a third embodiment of an adjustment device of the adjustment system;

Figure 17 is a front view of a backpack equipped with the adjustment system according to a second embodiment;

Figure 18 is a front view of a backpack equipped with the adjustment system according to a third embodiment.

In the following, the notions of "top >>," bottom >>, "upper >>," lower >>, "left >>," right >>, "horizontal >>," vertical >>, "before> >, "Rear >>," anterior >>, "posterior" are defined from the point of a user who is standing on a horizontal ground and who carries the backpack 2 on his back.

The invention relates to an adjustment system 1 for a backpack 2. For the purposes of the invention, a backpack is a carrying article provided with two straps 21, 22 fixed on a back panel 23, indicated in dotted lines in Figures 2 and 3, and one or more pockets, anterior (s) or dorsal (s). Thus, a single strap, each strap and / or the back panel can carry one or more pockets. For example, according to one embodiment, the backpack has no back pocket and only includes pockets carried by the suspenders. Each strap 21, 22 includes a front part 211, 221 intended to cover a front part of the user's trunk. In the embodiments illustrated in the figures, the straps constitute a continuous panel with the back panel so as to form a bolero type structure. As a variant, the straps can comprise several elements assembled via an adjustment loop making it possible to adjust the length of the straps.

Advantageously, each front part 211, 221 of a strap 21, 22 carries fixing elements 212, 222 for hanging the adjustment system 1. The fixing elements 212, 222 are distributed, vertically, along the strap 21, 22. In these examples, the fastening elements 212, 222 consist of a succession of loops produced by cords sewn at the medial edge of each strap and distributed regularly over the height of the strap. Other fastening elements can be envisaged, such as, for example, flexible vertical bars or perforated vertical strips.

To adjust the spacing between the front part 211 of a first strap 21 and the front part 221 of a second strap 22, the backpack 2 includes an adjustment system 1. This adjustment allows good positioning and plating of the straps against the body of the user and therefore good support of the backpack, especially when the user is running.

FIG. 1 illustrates a first embodiment of such an adjustment system 1. It includes:

an upper link 101 delimited by a first upper end 1011 and a second lower end 1012, a lower link 102 delimited by a first upper end 1021 and a second lower end 1022, a first attachment element 11 intended to be fixed on the first strap 21, the first attachment element 11 being secured to the upper link 101 at its first end 1011, a second attachment element 12 intended to be fixed on the first strap 21, the second attachment element 12 being integral of the lower link 102 at its second end 1022.

a third attachment element 13 intended to be fixed on the first strap 21, the third attachment element 13 being integral with the upper link 101, close to its second end 1012, and the lower link 102, close to its first end 1021 , the third attachment element comprising:

a first adjustment device 1321 making it possible to adjust the relative position of the connection between the upper link 101 and the third attachment element 13, and a second adjustment device 1322 making it possible to adjust the relative position of the connection between the link lower 102 and the third attachment element 13,

According to this first embodiment, the adjustment system also includes:

a fourth attachment element 14 intended to be fixed on the second strap 22, the fourth attachment element 14 forming a loop for the upper link 101, a fifth attachment element 15 intended to be fixed on the second strap 22, the fifth attachment element 15 forming a loop for the lower link 102,

The attachment elements 11, 12, 13, 14 and 15 are all intended to be fixed on a strap 21, 22 and in particular by cooperating with a fastening element 212, 222 of a strap. Advantageously, as described above, each strap is provided with several fastening elements distributed vertically along the strap which allows the adjustment of the vertical position of each hooking element 11, 12, 13, 14 and 15 on the straps. Thus, the user can adapt his adjustment system to his morphology and target the areas where he wishes to hold / tighten. Advantageously, the attachment elements 11, 12, 13, 14 and 15 are removably mounted on the fastening elements 212, 222 of the straps. Again, this allows customization of the adjustment system according to its needs. It also allows you to reverse the configuration of the adjustment system so that it is versatile, suitable for right-handers and left-handers. The assembly of the adjustment system is then reversed. Thus, depending on the desired configuration, each attachment element 11-15 is mounted either on the left strap or on the right strap. Consequently, in the description, the first strap 21 can be either the left strap or the right strap. In the figures, arbitrarily, the first strap 21 designates the right strap.

In a variant, some or all of the attachment elements 11, 12, 13, 14 and 15 are fixed in a non-removable manner on the straps. This is to avoid losing an element of grip.

In this example, the lower link and / or the upper link are cords. By being in the form of cords, the links have good tensile strength while being light. They are easy to set up and do not require any particular orientation when they are connected to an element of the adjustment system.

Alternatively, other types of links can be used. For example, it can be ribbons, straps or laces.

Advantageously, the lower link and / or the upper link are elastic. The elasticity brings a "dynamic" tension at the connection between the straps. This allows good support while providing flexibility so as not to interfere with breathing. Alternatively, part of the lower link and / or part of the upper link are elastic. Indeed, it is not necessary that the whole link is elastic and it may be desirable to have a little stiffness / support locally. Finally, the links may not be elastic.

In the example illustrated, the upper link 101 and the lower link 102 form a single continuous link 10, the second end 1012 of the upper link 101 constituting the first end 1021 of the lower link 102. The upper link 101 then constitutes the upper part of the continuous link 10 while the lower link 102 constitutes the lower part of the continuous link 10. Due to this construction, the continuous link 10 forms a loop 103, at the level of the third attachment element 13, between the two adjusting devices 1321 , 1322. This loop 103 facilitates the gripping of the link 10 locally in order to actuate the adjustment devices 1321, 1322. In addition, this allows simultaneous action on the adjustment devices 1321, 1322.

To improve actuation ergonomics, the adjustment system comprises a gripping means 104 integral with the continuous link 10, at the level of a loop 103. The gripping means 104 may be a strip folded back on itself surrounding the link continuous 10 or a plastic tip surrounding or molded around the continuous link 10.

Alternatively, the upper 101 and lower 102 links are separate and independent. The user can thus easily operate the adjustment devices 1321, 1322 independently. Gripping means can be provided at the free ends 1012 and 1021 of the links 101 and 102.

In the following, we consider the tightening part of a link 101, 102, the part of the link included between the attachment element 11 and the attachment element 13 or the part of the link included between the element hooks 13 and the hooking element 12. Similarly, the actuation part of a link 101, 102 is considered, the part extending beyond the hooking element 13. The actuation part includes ends 1012 and 1021 and / or loop 103.

In this example, there are three types of hooking elements constituting the adjustment system 1. A first type of hooking element 11, 12 makes it possible to connect one end of a link to a strap. A second type of attachment element 14, 15 makes it possible to guide part of a link. This second type of hooking element comprises link guiding element 142, 152. A third type of hooking element 13 makes it possible to ensure, simultaneously or not, the tension in the two links 101, 102.

Figures 4 to 6 illustrate a construction used for the attachment elements 11 and 12. The end 1011; 1022 of a link 101; 102 is directly integral with the body of the attachment element 11; 12. This connection can be obtained by overmolding, gluing, welding or using a knot at the end of the link, the link having previously passed through an orifice formed in the body of the attachment element 11; 12. The hanging element 11; 12 also includes a clip 111; 121 in the form of hooks defining a passage for receiving a fastening element 212 of a strap 21, here, in this case a loop. These hooks 111; 121 are arranged so as to be able to disengage the hooking element from the strap fastening element. We can consider other fastening solutions 111; 121 for securing, in a removable manner or not, the attachment element with the attachment element of the strap.

According to one embodiment, the attachment elements 11 and 12 are a particular shaping of an end 1011, 1022 of a link 101, 102. It can be a simple knot. For example, the link 101, 102 passes through an eyelet forming a fastening element 212, 222 of a strap and a knot is formed at the end of the link to prevent it from disengaging from the eyelet. Alternatively, the end of the link can form a loop, with a slip knot, the strand of the loop passing through the eyelet.

According to another embodiment, the end 1011, 1022 of a link 101, 102 is directly secured to the corresponding strap, for example, by sewing. In this case, the hooking elements 11 and 12 correspond to the connecting element between the link and the strap, for example, the thread of the seam.

Figures 7 to 9 illustrate a construction used for the attachment elements 14 and 15. Like the attachment elements 11 and 12, the attachment element 14; 15 includes a clip 141; 151 in the form of hooks defining a passage for receiving a fastening element 222 of a strap 22, here, in this case a loop. These hooks 141; 151 are arranged so as to be able to disengage the hooking element from the strap fastening element. We can consider other solutions of fasteners 141; 151 to removably or not secure the attachment element with the strap attachment element. In addition, the hanging element 14; 15 also includes a hook 142; 152 defining a passage, an open sheath or a split sheath to receive a portion of the tightening part of a link 101; 102. Thus, the link 101; 102 can slide through this passage, the attachment element 14; 15 then forms a passer-by for the corresponding link 101; 102. The passer-by is a kind of guide for the corresponding link. This hook solution 142; 152 makes it easy to disengage the link 101; 102 of the hooking element 14; 15 to remove the connection between the front parts of the straps which facilitates the establishment or removal of the backpack. This construction is simple and light. The hooks 142; 152 remain permanently on the shoulder strap 22. When the link is disengaged from the hooking element, the adjustment system does not include a rigid part freely floating and likely to hinder / injure the user or to catch on. Alternatively, one can envisage other solutions for securing in a removable manner or not the link 101; 102 with the hanging element 14; 15. For example, one can use a nozzle, integral with a link 101; 102, intended to be assembled by clipping or by magnet with the attachment element 14; 15.

Thus, the fourth attachment element comprises a guide element 142 designed to removably receive a portion of the upper link and / or in that the fifth attachment element comprises a guide element 152 designed to receive, from removably, a portion of the lower link.

The third type of construction concerns the central attachment element 13, the main object of the invention. Like the other attachment elements described above, the attachment element 13 comprises a fastener 131 in the form of hooks defining a passage for receiving a fastening element 221 of a strap 21, here, in this case a loop . These hooks 131 are arranged so as to be able to disengage the attachment element from the attachment element of the strap. One can envisage other solutions of fasteners 131 for securing in a removable manner or not the attachment element with the attachment element of the strap.

The particularity of this attachment element 13 comes from the fact that it supports a first adjustment device 1321 and a second adjustment device 1322.

The first adjustment device 1321 makes it possible to adjust the relative position of the connection between the upper link 101 and the third attachment element 13. It therefore comprises a fixed jaw 1323 secured to the body of the attachment element 13, a movable jaw 1324 relative to the fixed jaw, an actuator 1325 secured to the movable jaw and, optionally, an elastic means 1326 acting on the movable jaw to move it towards the fixed jaw. The first adjustment device 1321 is designed to receive a portion of the upper link 101, close to the end 1012, so that this portion is inserted between the fixed jaw 1323 and the movable jaw 1324. Thus, when the movable jaw 1324 is urged to move towards the fixed jaw 1323, for example, thanks to the elastic means 1326, this has the effect of wedging the upper link 101 between the jaws. This pinching fixes the relative connection of the connection between the upper link 101 and the third attachment element 13. The upper link 101 is therefore secured to the third attachment element 13. The position of the third attachment element 13 on the upper link is fixed and cannot be changed without user action. This makes it possible to fix the length of the tightening part of the upper link, that is to say, the part of the link between the first attachment element 11 and the third attachment element 13. Conversely, when the user acts on the actuator 1325 so as to cause the spacing of the movable jaw relative to the fixed jaw, the upper link is released which can then slide freely between the jaws. By pulling on the end 1012 of the upper link 101, the user slides the upper link inside the first adjusting device 1321 until the desired length of the tightening part of the upper link is obtained, that is to say -to say, the part of the link between the first attachment element 11 and the third attachment element 13. Consequently, the user can release the actuator 1325 which has the effect of bringing the jaws together, for example, by virtue of by elastic means 1326. The upper link 101 is then again secured to the third hooking element 13. The first adjustment device 1321 thus allows the length of the tightening part of the upper link to be adjusted, that is to say say, the part of the link between the first attachment element 11 and the third attachment element 13. Consequently, it allows the adjustment of the spacing between the front part 211 of a first strap 21 e t the front part 221 of a second strap 22, at the upper link, when the upper link is engaged with the fourth hooking element 14. The user can modify the tightening / plating of the backpack around his chest as he wishes.

The second adjustment device 1322 makes it possible to adjust the relative position of the connection between the lower link 102 and the third attachment element 13. The construction of this second device 1322 is similar to the first adjustment device 1321. It includes a jaw fixed 1323 secured to the body of the hooking element 13, a movable jaw 1324 relative to the fixed jaw, an actuator 1325 secured to the movable jaw and, optionally, an elastic means 1326 acting on the movable jaw to move it towards the fixed jaw. The second adjustment device 1322 is designed to receive a portion of the lower link 102, close to the end 1021, so that this portion is inserted between the fixed jaw 1323 and the movable jaw 1324. Thus, when the movable jaw 1324 is urged to move towards the fixed jaw 1323, for example, by means of elastic means 1326, this has the effect of wedging the lower link 102 between the jaws. This pinching fixes the relative connection of the connection between the lower link 102 and the third attachment element 13. The lower link 102 is therefore secured to the third attachment element 13. The position of the third attachment element 13 on the lower link is fixed and cannot be changed without user action. This makes it possible to fix the length of the tightening part of the lower link, that is to say, the portion of the link between the second attachment element 12 and the third attachment element 13. Conversely, when the user acts on the actuator 1325 so as to cause the spacing of the movable jaw relative to the fixed jaw, the lower link is released which can then slide freely between the jaws. By pulling on the end 1021 of the lower link 102, the user slides the lower link inside the second adjusting device 1322 until the desired length of the tightening part of the lower link is obtained, that is to say -to say, the part of the link between the second attachment element 12 and the third attachment element 13. Therefore, the user can release the actuator 1325 which has the effect of bringing the jaws together, for example, by by elastic means 1326. The lower link 102 is then again secured to the third hooking element 13. The second adjustment device 1322 thus allows the length of the tightening part of the lower link to be adjusted, that is to say say, the part of the link between the second attachment element 12 and the third attachment element 13. Consequently, it allows the adjustment of the spacing between the front part 211 of a first brete lle 21 and the front part 221 of a second strap 22, at the level of the lower link, when the lower link is engaged with the fifth hooking element 15. The user can modify the tightening / plating of the backpack around the lower region of the trunk as desired.

Because the first and second adjustment devices 1321, 1322 are arranged on the third attachment element 13, this makes it possible to position the operating members of the two adjustment devices in a reduced area. The user can easily grab them for manipulation, even when they are in an area of the near field of vision. Thanks to this proximity, the gripping of these operating devices is more intuitive and can be done by touch, "blind". This advantage is all the more marked when the user wants to act simultaneously on the first and second adjusting devices 1321, 1322.

The first and second adjustment devices 1321, 1322 can be two independent devices, operating independently. This makes it easy to get differential tightening between the top link and the bottom link.

Advantageously, the first and second adjustment devices 1321, 1322 share common parts in order to form a single blocker 132. This construction turns out to be more compact, light with a reduced number of parts. It allows simultaneous, fast and balanced adjustment of the upper and lower links. With a common actuator, the actuation of the adjustment devices is simple, ergonomic and more intuitive, in particular for manipulation by touch, "blind".

In this case, the first adjustment device and the second adjustment device form a single blocker 132 comprising two jaws 1323, 1324 between which pass the upper link 101 and the lower link 102, the two jaws being movable, one relative to the other, so that when the jaws are brought together, the upper link and the lower link are wedged between the two jaws and, when the jaws are distant, the upper link and the lower link are free to slide at the inside the single blocker.

According to one embodiment, the single blocker 132 comprises an elastic means 1325 making it possible to bring the jaws together and the jaws are designed so that an action on a link in one direction moves the jaws away while an action in the other direction maintains the clamping of the jaws.

There are a multitude of technical solutions to achieve these two adjustment devices. In a non-exhaustive manner, the documents US4328605, W0200912081 or EP1495691 illustrate examples of applicable embodiments.

FIG. 10 represents a first embodiment of these two adjustment devices. In this case, the single blocker 132 comprises a housing, a push button, inserted in the housing, and a spring 1326 interposed between the button and the housing. The push button includes a transverse through hole through which the two links 101, 102 pass. The housing also comprises two transverse coaxial through holes through which the two links 101, 102 also pass. The button and the housing are indexed so that the holes transverse can be coaxial when the button is pressed in the housing. When the button is not pressed by the user, the spring pushes the button out of the housing. This movement of the button causes the axes of the transverse holes to be misaligned. As a result, the links get stuck at the interface between these cross holes. The links thus join with the housing. By pressing the button, the cross holes tend to line up which results in the release of the links. These can then slide freely in the transverse holes. In this example, the actuator 1325 is produced by the push button, the fixed jaw 1323 is produced by an internal edge of the coaxial transverse holes in the housing and the movable jaw 1324 is produced by an external edge of the transverse hole in the button. The same fixed jaw and the same movable jaw are used to block the upper and lower links. This embodiment is described in document US4328605.

Figures 11 to 13 show a second embodiment of these two adjustment devices. FIG. 11 represents a hooking element 13 integrating a single blocker 132. FIG. 12 represents a section of the single blocker 132 in a configuration for blocking the links while FIG. 13 represents the same section of the single blocker 132 but in a configuration release links.

In this example, the single blocker 132 comprises a body in which is formed a V-shaped housing, bordered by two side walls 1323a, 1323b, a disc 1324 inserted in the housing, and a spring 1326, shown diagrammatically on the figure 12, acting on the disc to push it towards the bottom of the housing. The disc 1324 is extended by an extension 1325 projecting from the housing. The single blocker 132 is designed to receive a portion of the upper link 101, close to the end 1012, so that this portion is inserted between a first side wall 1323a of the housing and a first edge 1324a of the disc 1324 opposite. -screw of the first side wall 1323a and a portion of the lower link 102, close to the end 1022, so that this portion is inserted between the second side wall 1323b of the housing and a second edge 1324b of the disc 1324 in screw- opposite the second side wall 1323b. The links 101, 102 thus pass, on either side of the disc 1324. In the absence of stress on the disc 1324 and its extension 1325, the spring 1326 pushes the disc 1324 to the bottom of the housing. Consequently, the links 101, 102 are wedged between the disc 1324 and a side wall 1323a, 1323b of the housing, as seen in FIG. 12. When the user pulls on the extension 1325, it causes the disc to move. 1324 relative to the housing so as to move the disc away from the bottom of the housing. The distance between the side walls 1323a, 1323b and the edges 1324a, 1324b of the disc 1324 increases, causing the release of the links 101, 102, as seen in Figure 13. These can then slide freely in the single blocker . In this example, the actuator 1325 is produced by the extension, the fixed jaw 1323 is produced by a side wall 1323a, 1323b of the housing and the movable jaw 1324 is produced by an edge 1324a, 1324b of the disc. Unlike the previous embodiment, the upper link and the lower link are blocked in separate zones. The upper link 101 is inserted between a part of the first side wall 1323a of the housing and a part 1324a of the first edge of the disc facing the first side wall. The lower link 102 is inserted between a part of the second side wall 1323b of the housing and a part 1324b of the second edge of the disc facing the second side wall. By separating these two blockages, the reliability of the single blocker is improved by reducing the risk of tangling the links between them and the risk of slipping one link along the other. In addition, these dissociated tightenings make it possible to maintain a tightening even if one of the blockages fails. This embodiment is described in document EP1495691.

FIGS. 14 to 16 show a third embodiment of these two devices for adjusting the third attachment element 13.

As described above, the attachment element 13 comprises a fastener 131 in the form of hooks defining a passage for receiving a fastening element 221 of a strap 21, here, in this case a loop. These hooks 131 are arranged so as to be able to disengage the attachment element from the attachment element of the strap. One can envisage other solutions of fasteners 131 for securing in a removable manner or not the attachment element with the attachment element of the strap.

A special feature of this blocker is that it does not include elastic means for bringing the movable jaw towards the fixed jaw. This reduces the number of parts of the blocker. The blocker is robust (less wear) and easy to use.

In this example, the single blocker 132 comprises a body 1325 in which is formed a through opening 1327 delimited by two longitudinal walls 1325u, 1325v and two side walls 1325a, 1325b, as well as a movable jaw 1324 arranged so as to partially close off the opening 1327. The movable jaw 1324 is able to translate longitudinally in the opening 1327, from one longitudinal wall 1325u, 1325v towards the other 1325v, 1325u. Thus, this construction makes it possible to create a passage 1327u between the movable jaw 1324 and a longitudinal wall 1325u and a passage 1327v between the movable jaw 1324 and a longitudinal wall 1325v. To define the blocker, we consider the "upper" / "lower", "upper" / "lower" parts, with reference to the position of the blocker as shown in FIG. 15. The movable jaw 1324 comprises a longitudinal rib central 1324c extending vertically, upwards, so as to delimit two housings arranged on either side of the rib 1324c. Each of these housings is delimited by the rib 1324c, an upper face of the jaw 1324 and a side wall 1325a, 1325b of the body 1325 of the blocker. The single blocker 132 is designed to accommodate a portion of the upper link 101, close to the end 1012, and a portion of the lower link 102, close to the end 1021. For this embodiment, upstream, the upper link 101 passes through the passage 1327v, from bottom to top, then into the housing delimited by the rib 1324c, an upper face of the jaw 1324 and the side wall 1325a of the body 1325 of the blocker and then passes through the passage 1327u, from the top at the bottom, to continue, downstream, to its end 1012. This arrangement is illustrated in Figures 15. With regard to the lower link 102, it passes through the passage 1327v, from bottom to top, then into the housing delimited by the rib 1324c, an upper face of the jaw 1324 and the side wall 1325b of the body 1325 of the blocker and then passes through the passage 1327u, from top to bottom, to continue until its end 1021. This arrangement tion is not illustrated but is identical to that shown in Figure 15.

In the case of a continuous link 10, the ends 1012 and 1021 are connected so as to form a loop 103 as we have seen previously. The loop 103 is thus produced at the outlet of the single blocker 132, after the passage of the links 101, 102 through the passage 1327u.

The blocking configuration of the blocker links is illustrated in FIG. 15. In this configuration, the body 1325 of the blocker is substantially aligned with the orientation of the links 101, 102 upstream and downstream of the blocker. At the passage 1327u, the links are bent at an angle close to 90 ° against an edge of the longitudinal wall 1325u of the body 1325 of the blocker which makes it possible to slow the movement of the links relative to the body 1325, at this edge . Furthermore, in this configuration of orientation of the links, in particular upstream, the more a link is tensioned at its clamping part, the more it will exert a force on the movable jaw 1324 to push it towards the longitudinal wall 1325u of the body 1325 of the blocker, as shown by the arrow F in FIG. 15. This translation of the movable jaw 1324 causes the links 101, 102 to be pinched between a part 1324a, 1324b of the movable jaw 1324 and a part 1323a, 1323b the longitudinal wall 1325u of the body 1325 of the blocker. These parts 1323a, 1323b of the longitudinal wall 1325u correspond to the fixed jaw 1323. The links are then blocked, secured to the body 1325 of the blocker. The higher the tension of the tightening part of the links, the more the links are clamped between the jaws 1323, 1324 of the blocker. To tension the tightening part of a link, simply reduce the length of the tightening part of the link while the backpack is worn. Therefore, the perimeter of the trunk at this level will exert a force on the tightening part of the link, perpendicular to the trunk, and, as the length of the tightening part of the link is fixed, this results in an increase in the tension of the link .

The release configuration of the blocker links is illustrated in Figure 16. Thus, to release the links, simply rotate the body 1325 around the axis of the clip 131 as shown by the arrow R in Figure 16 Here, it is considered that the body 1325 corresponds to the actuator of the single blocker 132. By thus lifting the actuator 1325, the links 101, 102 are reoriented relative to the blocker 132, upstream and downstream of the blocker. This new orientation of the links makes it possible to free the links at the level of the passage 1327u. In this configuration, the orientation of the downstream link is substantially aligned with the passage 1327u, the link is therefore no longer retained at this level. It can therefore slide freely through passage 1327u. Furthermore, the orientation of the link downstream relative to the movable jaw 1324 is such that the link no longer exerts a significant force on the movable jaw 1324 to push it towards the longitudinal wall 1325u of the body 1325 of the blocker. There is therefore no more pinching between the jaws 1323, 1324 of the blocker. The links are then released and can slide freely in the passages 1327u, 1327v.

To adjust the tightening of the links against the body of the user, the user switches the blocker in its release configuration, as illustrated in FIG. 16. In a second step, he pulls on the ends 1012, 1021 of the links 101, 102 or energizes the tightening part of the links 101, 102, until the desired upper link length of the tightening parts of the links is obtained, that is to say, the parts of the links between the element of hooks 13 and the hooking element 11 and the desired length of the lower link between the hooking element 13 and the hooking element 12. Then it folds down the actuator 1325 (movement in the opposite direction of the arrow R represented in FIG. 16) to switch the blocker into its blocking configuration illustrated in FIG. 15.

Advantageously, the central rib 1324c is pierced by a transverse hole 1324d so as to be able to attach a cord, not shown, to the movable jaw. Thus, the user can grasp the cord and pull it in a direction which makes it possible to cause the movable jaw to move away from the fixed jaw, thereby releasing the links. This construction facilitates the tilting of the two adjustment devices in a release configuration with a simple gesture.

In FIGS. 15 and 16, the operation of the blocker acting on the upper link 101 is illustrated. This operation is directly transposed to the operation of the blocker acting on the lower link 102.

In this embodiment, the upper link and the lower link are blocked in separate zones. By separating these two blockages, the reliability of the single blocker is improved by reducing the risk of tangling the links between them and the risk of slipping one link along the other. In addition, these dissociated tightenings make it possible to maintain a tightening even if one of the blockages fails.

Advantageously, the first and second adjustment devices 1321, 1322 are self-tightening devices in the sense that if the actuator is not stressed, if the links are pulled upstream, that is to say , if one exerts a tension on the tightening part of the links, one blocks more the links between the jaws. This secures tightening and adjustment.

According to one embodiment, if the pulling links are pulled down, that is to say, at the level of the actuating part, the links can be slid in the blocker. This facilitates adjustment because the user does not need to act on the actuator.

Advantageously, the first and second adjustment devices 1321, 1322 are self-locking devices in the sense that in the rest position, in the absence of stress from the user, they block the links passing through them. This characteristic is obtained thanks to an elastic means 1326 as is the case with the first two embodiments illustrated above. Alternatively, this characteristic can be achieved by a specific construction as is the case with the third embodiment illustrated above. This specificity of the adjustment devices makes the unique blocker 132 also self-locking.

The adjustment of the carrying of the backpack will now be explained through the example illustrated in Figures 2 and 3.

First, the user installs the adjustment system on the backpack as shown in FIG. 2. This operation consists in connecting the attachment elements 11, 12 and 13 with one of the fixing elements 212 of the first strap 21 and to connect the hooking elements 14 and 15 respectively with one of the fixing elements 222 of the first strap 22. The connection is made via the fasteners 111, 121, 131, 141, 151 of the hooking elements 11 , 12, 13, 14, 15. As described above, each strap comprises a succession of fastening elements 212, 222 distributed vertically, along each strap. The user then chooses the fastening elements 212, 222 to which he wants to connect the fastening elements 11, 12, 13, 14 and 15 according to his desire for carrying comfort. It can thus adjust the vertical positions of the attachment points of the adjustment system.

In this configuration, the upper link 101 and the lower link 102 are disconnected from the attachment elements 14 and 15. Thus, the user can easily put his backpack in place. He is not shy about putting on the suspenders.

In a second step, the user connects the upper link 101 with the attachment element 14 and / or the upper link 102 with the attachment element 15, as required, as shown in FIG. 3. The connection is made via the hooks 142, 152 of the hooking elements 14, 15.

Thirdly, the user grasps the loop 103 or the gripping means 104 and pulls on it. Due to the fact that the hooking element 13 is fixed on the first strap 21, via the connection 131 / fixing element 212, this traction on the upper and lower links results in the release of the links in the blocker 132. The user pulls until the desired tightening / adjustment is achieved. As soon as it obtains the desired setting, it releases the loop. The blocker reacts by blocking the links, which makes it possible to freeze the length of the tightening part of the upper link, that is to say, the part of the link between the attachment element 13 and the attachment element 11. and the length of the tightening part of the lower link, that is to say, the part of the link between the attachment element 13 and the attachment element 12. This adjustment operation is simple and intuitive. It allows fast, simultaneous, balanced and comfortable tightening. It is always possible for the user to have a dissociated tightening between the upper link and the lower link. For this, it must pull on a single strand 1012, 1021 of the loop 103 and not on the loop.

During this operation, by pulling on the ends of the links 101, 102, the user firstly brings these anterior parts of the backpack together, then, in a second step, it increases the plating, the tightening of the bag against the user's body.

The backpack is then configured for good carrying comfort.

To modify this holding configuration, the user acts on the actuator 1325 to release the links of the blocker 132. Consequently, it suffices to exert a force on the links to relax them, to increase the length of the tightening part of the upper link, that is to say, the part of the upper link between the hooking element 13 and the hooking element 11 and the length of the tightening part of the lower link, that is to say , the part of the lower link between the attachment element 13 and the attachment element 12. This thus makes it possible to adjust the spacing between the front part 211 of a first strap 21 of the backpack 2 and the part front 221 of a second strap 22 of the backpack.

To remove the backpack, the user disengages the upper link 101 from the attachment element 14 and the upper link 102 from the attachment element 15. He can then easily remove his backpack.

This first embodiment of the adjustment system comprising five attachment elements 11-15 has the advantage of being practical for the installation and removal of the backpack. In fact, the use of the fourth 14 and fifth hooking elements 15 fixed on the second strap 22 makes it possible to easily couple or uncouple the links 101, 102 with the second strap. With a simple gesture, the user can connect a link 101, 105 with the corresponding hooking element 14, 15. In this embodiment, this connection is made using simple hooks 141,151.

The invention is not limited to the use of five hooks 11-15.

According to a second embodiment, illustrated in FIG. 17, the adjustment system comprises only three hooking elements 11, 12 and 13. In this case, the third hooking element 13 is intended to be fixed on the first strap 21 while the first 11 and second attachment elements 12 are intended to be fixed to the second strap 22. This construction is simple and requires only two types of attachment elements.

According to a third embodiment, illustrated in FIG. 18, the adjustment system comprises only four attachment elements 11, 12, 13 and 14. In this case, the first 11 and third attachment elements 13 are intended to be attached to the first strap 21 while the second 12 and fourth attachment elements 14 are intended to be attached to the second strap 22. In this example, three types of attachment elements are used.

The adjustment system can comprise more than five hooking elements and in particular arranged with more hooking elements similar to the fourth 14 and fifth hooking elements 15. Each link 101, 102 then forms as much zigzag as desired.

Thus, according to certain embodiments, the first attachment element 11 and / or the second attachment element 12 can be connected to the second strap 22 and therefore not necessarily to the same strap as that to which the third element is connected. hook 13.

According to a variant, the attachment elements 14; 15 are directly secured to the corresponding strap, for example, by gluing or sewing. In this case, they mainly comprise a hook 142; 152. According to one embodiment, the backpack can comprise a succession of hooks / hooking elements distributed vertically along a strap, permanently fixed to the strap. Thus, the user can very quickly choose which of the hooking elements he wishes to use in relation to his need.

As mentioned above, the adjustment system advantageously comprises at least one attachment element 14, 15 provided with a guide element 141, 151 designed to removably receive a portion of a link. This feature facilitates the connection and disconnection of a portion of a link with a strap which can facilitate the installation and removal of the backpack.

The invention is not limited to these embodiments. It is possible to combine these embodiments.

The invention is not limited to the embodiments previously described but extends to all the embodiments covered by the appended claims.

Nomenclature

1- Adjustment system

10- Continuous link

101- Top link

1011- First end

1012- Second end

102- Lower link

1021- First end

1022- Second end

103- Loop

104- Gripping means

11- First hook

111- Attachment

12- Second hooking element

121- Attachment

13- Third hook

131- Attachment

132- Single blocker

1321 - First adjustment device

1322- Second adjustment device

1323- Fixed jaw

1323a- Part in engagement with the upper link

1323b- Part engaged with the lower link

1324- Movable jaw

1324a- Part in engagement with the upper link

1324b- Part engaged with the lower link 1324c- Rib

1324d- Cross hole

1325- Actuator; Body

1325a, b- Side wall

1325u, v- Longitudinal wall

1326- Elastic medium

1327, u, v- Passage

14- Fourth hook

141- Attachment

142- Hook

15- Fifth hook

151- Attachment

152- Hook

2- Backpack

21-First strap

211- Front part

212- Fasteners

22- Second strap

221- Front part

222- Fastening elements

23- Back panel

Claims (10)

1- Adjustment system (1) for the spacing between the front part (211) of a first strap (21) of a backpack (2) and the front part (221) of a second strap (22 ) of the backpack, the adjustment system comprising: an upper link (101) delimited by a first (1011) and second ends (1012), a lower link (102) delimited by a first (1021) and second ends (1022), a first attachment element (11) intended to be attached to a strap (21, 22), the first attachment element being integral with the upper link at its first end, a second attachment element (12) intended to be attached to a strap (21, 22 ), the second attachment element being integral with the lower link at its second end, a third attachment element (13) intended to be fixed on the first strap (21), the third attachment element being integral with the upper link, close to its second end, the third attachment element comprising a first adjustment device (1321) making it possible to adjust the relative position of the connection between the upper link and the third attachment element, ca characterized in that the lower link cooperates with a second adjustment device (1322) formed on the third attachment element, close to the first end of the lower link, the second adjustment device making it possible to adjust the relative position of the connection between the lower link and the third hook. 2- Adjustment system (1) according to claim 1, characterized in that it comprises: a fourth hooking element (14) intended to be fixed on the second strap, the fourth hooking element forming a loop for the upper link, and / or a fifth hooking element (15) intended to be fixed on the second strap, the fifth hook element forming a loop for the lower link, 3- adjustment system (1) according to the preceding claim, characterized in that the fourth attachment element comprises a guide element (142) designed to removably receive a portion of the upper link and / or in that the fifth attachment element comprises a guide element (152) designed to removably receive a portion of the lower link. 4- Adjustment system (1) according to one of the preceding claims, characterized in that the upper link and the lower link form a single continuous link (10), the second end of the upper link constituting the first end of the lower link. 5- adjustment system (1) according to the preceding claim, characterized in that it comprises a gripping means (104) integral with the continuous link, at a loop (103) formed by the continuous link between the first device and the second adjuster. 6- Adjustment system (1) according to one of the preceding claims, characterized in that the lower link and / or the upper link are elastic. 5 7- Adjustment system (1) according to one of the preceding claims, characterized in that the lower link and / or the upper link are cords. 8- Adjustment system (1) according to one of the preceding claims, characterized in that the first adjustment device and the second adjustment device form a single blocker (132) comprising two jaws (1323, 1324) between which pass the link 10 upper and lower link, the two jaws being movable relative to each other so that, when the jaws are brought together, the upper link and the lower link are wedged between the two jaws and, when the jaws are distant, the upper link and the lower link are free to slide inside the single blocker. 9- Backpack (2) comprising an adjustment system (1) according to one of the preceding claims 15. 10- Backpack (2) according to the preceding claim, characterized in that it comprises fastening elements (212, 222), arranged on the straps, making it possible to fix the hooking elements of the adjustment system at different positions , along each strap.