Backpack frame

Abstract

A backpack comprising: a pocket bounded by a rear wall that faces the back of a user when the backpack is worn; and a frame partially secured to the rear wall, the frame including a structural portion that enables the rear wall to be shaped. The frame includes an extension connected to the structural portion extending from the structural portion toward the back of the user, the extension being designed and arranged to define a support section located at the level of the waist region of the user when the backpack is worn. A structural portion of the frame is formed in an arch shape such that a middle portion of the structural portion is farther away from a user's back than top and bottom portions of the structural portion.

Description

Technical Field

[0001] A backpack in the sense of the invention is an article for carrying a load, provided with a main shoulder pocket delimited by a rear wall facing the user's back when the backpack is worn, and two shoulder straps secured to a rear wall. Background Art

[0002] In order to improve the load bearing and ventilation of the back, some backpacks integrate a frame for shaping the rear wall of the main backpack. Thus, documents EP 2275000 and DE 19932498 propose a frame partially fixed to the rear wall, which is designed to shape the rear wall on the one hand so as to form a ventilation space between the middle wall intended to cover the user's back and the rear wall, and on the other hand to allow the load to be transferred via the ilium to the pelvic bones, more specifically to the buttocks. Summary of the invention

[0003] The object of the present invention is to provide a backpack with improved load carrying.

[0004] Another object is to provide a backpack that allows good load transfer.

[0005] Another object is to provide a backpack that ensures good ventilation of the back when loaded.

[0006] To this end, the present invention relates to such a backpack, comprising:

[0007] - a pocket delimited by a rear wall facing the back of the user when the backpack is worn,

[0008] - a frame partially fixed to the rear wall, said frame comprising structural parts enabling the rear wall to be shaped.

[0009] The backpack is characterized in that the frame comprises an extension connected to the structural part, extending from the structural part towards the back of the user, the extension being designed and arranged to define a support section located at the level of the waist area of ​​the user when the backpack is worn. In addition, the structural part of the frame is formed in an arch shape so that the middle part of the structural part in the projection in the sagittal plane is further away from the back of the user than the top and the bottom of the structural part.

[0010] Thus, the frame allows, on the one hand, a ventilation space to be formed between the back and the backpack, and, on the other hand, a load transfer at the waist level, which is an advantageous support area to improve the carrying comfort and reduce fatigue pain caused by long-term carrying. This construction allows pressure to be applied in the waist area through the extension. The extension also provides a certain elasticity to the frame in order to allow cushioning the movement of the backpack, especially in the direction of the backpack moving away and approaching. This leads to better carrying comfort.

[0011] Optionally, the present invention may have any of the following optional features taken alone or in combination:

[0012] -The frame is made of shaped cylindrical metal bars.

[0013] - The backpack includes a middle panel connected to the lower and upper portions of the rear wall.

[0014] - An intermediate panel extends between the lower and upper parts of the rear wall.

[0015] - A frame is inserted between said wall and the intermediate wall.

[0016] - the backpack comprises a belt connected to the lower part of the rear wall, the belt comprising an inner wall and an outer wall opposite the inner wall, the inner wall being intended to come into contact with the user's body when the belt is closed, and the extension being designed so that the support section comes into contact with the outer wall of the belt at the level of the user's waist area when the backpack is worn.

[0017] The support section of the extension extends laterally by at least three centimetres.

[0018] - The frame comprises a lower part forming two open lower loops arranged vertically at the same level and laterally spaced from each other, the two lower loops being connected by a lower middle part defining the extension, the lower middle part being arranged so that, in projection in the longitudinal plane, it is closer to the back of the user than the structural parts of the frame.

[0019] - The frame is removably mounted on the rear wall.

[0020] - In the projection in the sagittal plane, the support section is offset upwards relative to the bottommost part of the frame by a distance between 60 and 140 millimeters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be better understood by reading the following description and accompanying drawings, in which:

[0022] Figure 1 It is a perspective view of a backpack according to a first embodiment of the present invention.

[0023] Figure 2 yes Figure 1 Back view of backpack.

[0024] Figure 3 yes Figure 1 Side view of the backpack being worn.

[0025] Figure 4 yes Figure 1 Side view of the backpack being worn.

[0026] Figure 5 is a front view of a first embodiment of a backpack frame.

[0027] Figure 6 yes Figure 5 Side view of the frame.

[0028] Figure 7 is a front view of a second embodiment of a backpack frame.

[0029] Figure 8 yes Figure 7 Side view of the frame.

[0030] Fig. 9 is a front view of a third embodiment of a backpack frame.

[0031] Fig.10 yes Fig. 9 Side view of the frame. DETAILED DESCRIPTION

[0032] In the following description, a coordinate system is used in which the direction from the outer wall of the bag to the boundary wall with the back of the user corresponds to the X axis, the transverse direction or right to left direction corresponds to the Y axis, and the vertical direction or bottom to top direction corresponds to the Z axis. This coordinate system needs to be interpreted relative to the backpack being placed upright in front of the user, with the back of the bag facing the user as seen from the outer wall of the bag. The longitudinal plane XZ is a plane including the X axis and the Z axis. The frontal plane YZ is a plane including the Y axis and the Z axis. The transverse plane XY is a plane including the X axis and the Y axis.

[0033] The present invention relates to a backpack 1, comprising:

[0034] a backpack 2 delimited by an outer wall 22 and by a rear wall 21 facing the back of the user when the backpack is worn, the rear wall 21 being defined by an upper part 21U and a lower part 21D,

[0035] - two straps 3a, 3b fixed to the rear wall 21, each comprising a first end connected to the upper part 21U of the rear wall 21 and a second end connected to the lower part 21D of the rear wall 21, and

[0036] A frame 4 partially fixed to the rear wall 21 , said frame 4 comprising structural portions 41 to enable the rear wall 21 to be shaped.

[0037] More precisely, the invention relates to a specific configuration of the frame 4 and more specifically to an extension 42 connected to the structural portion 41, extending from the structural portion 41 towards the back of the user, said extension being designed and arranged to form a support 421 at the level of the user's waist zone ZL when the backpack is worn. The support area, bearing area or pressure area mentioned refers to the contact portion located at the lower part of the user's back when the backpack is worn. This corresponds to the transfer or recovery of the load between the load carried by the backpack and the user.

[0038] Figures 1 to 6 A first embodiment is illustrated. In this example, in addition to the aforementioned components, the backpack 1 also includes an intermediate panel 5 connected to the lower part 21D and the upper part 21U of the rear wall 21. The intermediate panel 5 is intended to contact or be close to the back of the user, being a boundary wall. The intermediate panel includes a central area 51 with a ventilation structure to allow air to pass through, for example, a porous fabric. The backpack 1 also includes a belt 6 connected to the bottom of the intermediate panel 5 and therefore to the lower part 21D of the rear wall 21. The belt 6 is defined by an inner wall 61 and an outer wall 62 opposite to the inner wall 61, the inner wall being intended to contact the user's body when the belt is closed. According to one embodiment, the lower part of the intermediate panel 5 forms the rear part of the belt 6.

[0039] In this example, the frame 4 is inserted between the rear wall 21 and the middle wall 5. The structural portion 41 of the frame 4 enables the rear wall 21 to be shaped. The structural portion is in an arched shape so as to be able to separate the middle portion of the rear wall 21 from the back. In other words, the projection of the structural portion 41 on the longitudinal plane XZ forms a concave curve with respect to the back. In addition, the middle panel 5 extends between the lower portion 21D and the upper portion 21U of the rear wall 21. Therefore, this configuration enables the formation of a ventilated space behind the user's back, between the middle panel 5 and the rear wall 21 arched by the structural portion 41 of the frame 4. The ventilated central area 51 of the middle panel 5 enables the sweat generated in the back to be discharged and / or the air to pass through to dry the sweat.

[0040] In this first embodiment, the frame 4 includes an upper portion 43, a lower portion 44, and a connecting portion 41 connecting the lower portion to the upper portion. Here, the connecting portion 41 of the frame defines a structural portion that allows the rear wall 21 to be formed. The structural portion 41 is formed in an arch shape so that the middle portion of the connecting portion is farther from the back of the user than the top and bottom of the structural portion 41 in the projection in the longitudinal plane XZ.

[0041] In this example, in its lower portion 44, the frame 4 forms two open lower loops 441a, 441b arranged vertically at the same level and laterally spaced apart from each other. The two lower loops 441a, 441b are connected by a lower intermediate portion 442 defining an extension 42. This extension 42 is arranged so that, in its projection in the sagittal plane XZ, it is closer to the back of the user than the structural portion 41 of the frame 4. In other words, whatever the transverse plane XY, along the height of the backpack, the extension 42 is always closer to the back of the user than the structural portion 41 of the frame 4.

[0042] Here, the extension 42 rises towards the upper part of the bag and comprises a support section 421 delimiting the upper part of the extension. The support section 421 extends over a width Y421 between 10 mm and 90 mm in the transverse direction Y. The width Y421 is preferably at least three centimeters. Figure 4 As illustrated, the support section is sized and arranged to be located at the level of the waist region ZL of the user when the backpack is worn. According to one embodiment, the support section 421 is arranged so that, in the projection in the transverse plane XY, it is closer to the back of the user than the bottommost part 443 of the frame 4. Advantageously, in the projection in the transverse plane XY, the distance X 421 of the support section 421 relative to the bottommost part 443 of the frame 4 is greater than 10 mm, preferably less than 90 mm. Furthermore, in the projection in the sagittal plane XZ, the support section 421 is advantageously offset upwards by a distance Z 421 between 60 and 140 mm relative to the bottommost part 443 of the frame 4.

[0043] According to one embodiment, the extension 42 is designed such that a projection of the extension 42 on the sagittal plane XZ forms an angle A42 between 0° and 20° with a projection of the bottom of the structural portion 41 on the same sagittal plane, and the angle A42 is preferably greater than 5°.

[0044] As seen before, the frame 4 is advantageously inserted between the rear wall 21 and the intermediate wall 5 and therefore the belt 6. In this example, the extension 6 is designed so that when the backpack is worn, a portion, the support section 421, is in contact with the outer wall 62 of the belt 6 at the level of the user's waist zone ZL.

[0045] Thus, at least by means of the support section 421, the frame 4 generates support at the level of the user's lumbar region ZL when the backpack is worn. Other parts of the extension 42 of the frame 4 may also exert support at the level of the bottom of the user's back. For example, parts of the lower middle part 442 other than the support section 421 may also be in contact with the outer wall 62 of the belt 6 and thereby generate additional support on the bottom of the user's back when the backpack is worn.

[0046] In this example, the frame 4 is a shaped cylindrical rod. The cross section of the rod may be circular, square or other geometrical patterns. The frame may be a tubular structure to reduce the weight of the structure in order to improve the carrying comfort. Advantageously, the frame is metal in order to obtain good rigidity for shaping the rear wall, but also to obtain good elasticity to provide pressure at waist level and good cushioning. However, it is possible to consider using other types of materials to make the frame, such as plastic.

[0047] In this example, the frame 4 is partially fixed to the rear wall 21 by means of four open pockets 215Ua, 215Ub, 215Da, 215Db (upper right 215Ua, upper left 215Ub, lower right 215Da and lower left 215Db) formed by the rear wall 21 and the intermediate wall 5 connected to each other at the four corners of the rear wall 21. These four pockets 215Ua, 215Ub, 215Da, 215Db are intended to receive corresponding parts of the frame which, once placed in place, will shape the rear wall 21 and stretch the intermediate wall 5. In addition, the frame 4 is fixed to the rear wall 21 by a central hook 211 connected to the connecting part 41 of the frame 4.

[0048] Figure 7 and Figure 8 A second embodiment of the frame 4 is illustrated. In this example, the extension 42 is connected at the level of the middle part of the structural part 41 of the frame 4, instead of at the level of the bottom of the structural part 41 of the frame 4 as in the first embodiment. As in the first embodiment, the extension 42 is designed and dimensioned to form a support section 421 positioned at the level of the waist zone ZL of the user when the backpack is worn.

[0049] Fig. 9 and Fig.10 A third embodiment of the frame 4 is illustrated. In this example, the middle portion of the structural portion 41 of the frame 4 forms an extension 42. Thus, the middle portion will extend towards the back of the user to form a support section 421 positioned at the level of the user's waist zone ZL when the backpack is worn. At this level, the middle portion will move away from the rear wall 21. Below the support section, at its bottom, the structural portion 41 returns towards the rear wall 21 in order to ensure the desired shaping of the rear wall.

[0050] Other configurations of the frame 4 are conceivable as long as they include an extension 42 connected to the structural portion 41 extending therefrom towards the user's back, said extension being designed and arranged to form a support 421 at the level of the user's lumbar region ZL when the backpack is worn.

[0051] In the embodiment described above, the frame 4 is removably mounted on the rear wall 21. This allows the frame to be replaced when it is damaged. In addition, if the bag is to be stored after removing the frame, it allows the bag to be compressed.

[0052] The invention is not limited to the embodiments described above as examples, but is intended to protect any equivalent configurations.These embodiments may therefore be combined.

[0053] The invention is not limited to the embodiments described previously but extends to all embodiments covered by the appended claims.

[0054] Reference numerals:

[0055] 1-Backpack;

[0056] 2-Back bag;

[0057] 21 - posterior wall;

[0058] 21U-Upper;

[0059] 21Ua-upper right pocket;

[0060] 21Ub-upper left pocket;

[0061] 21D-lower part;

[0062] 21Da-right lower pocket;

[0063] 21Db-lower left pocket;

[0064] 22-Outer wall;

[0065] 3-belt;

[0066] 4-Framework;

[0067] 41-Structural part;

[0068] 42- extension;

[0069] 421-support section;

[0070] 43 - upper part;

[0071] 44 - lower part;

[0072] 441-open ring;

[0073] 442 - lower middle part;

[0074] 443 - bottom part;

[0075] 5- Middle panel;

[0076] 51-ventilated central area;

[0077] 6-belt;

[0078] 61-inner wall;

[0079] 62-Exterior wall.

Claims

1. A backpack (1), comprising: - a pocket (2) delimited by a rear wall (21) facing the back of the user when the backpack is worn, - a frame (4) partially fixed to the rear wall, the frame comprising a structural portion (41) for enabling the rear wall to be shaped, It is characterized in that The frame comprises an extension (42) connected to the structural portion, extending from the structural portion towards the back of the user, the extension being designed and arranged to define a support section (421) located at the level of the user's lumbar region (ZL) when the backpack is worn, and, The structural portion of the frame is formed in an arch shape such that, in projection in the sagittal plane (XZ), a middle portion of the structural portion is further away from the back of the user than a top and a bottom portion of the structural portion.

2. The backpack according to claim 1, characterized in that: The frame is constructed from shaped cylindrical metal bars.

3. The backpack according to claim 1, characterized in that: The backpack comprises an intermediate panel (5) connected to the lower (21D) and upper (21U) portions of the rear wall, the intermediate panel extending between the lower and upper portions of the rear wall.

4. Backpack according to the preceding claim, characterized in that The frame is interposed between the wall and the intermediate wall.

5. The backpack according to claim 1, characterized in that: The backpack comprises a belt (6) connected to the lower part (21D) of the rear wall, the belt comprising an inner wall (61) and an outer wall (62) opposite the inner wall, the inner wall being intended to come into contact with the user's body when the belt is closed, and the extension being designed so that when the backpack is worn the support section (421) comes into contact with the outer wall of the belt at the level of the user's waist area, the belt being preferably connected to the intermediate panel.

6. The backpack according to claim 1, characterized in that: The frame comprises a lower part forming two open lower rings (441) arranged vertically at the same level and laterally spaced from each other, the two lower rings being connected by a lower middle part (442) defining the extension (42), the lower middle part being arranged so that in projection in the longitudinal plane (XZ) it is closer to the back of the user than the structural part (41) of the frame.

7. The backpack according to claim 1, characterized in that: The frame is removably mountable on the rear wall.

8. The backpack according to claim 1, characterized in that: In the projection in the sagittal plane (XZ), the support section is offset upwards by a distance (Z421) between 60 and 140 millimeters relative to the bottommost part (443) of the frame.

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