Adjustment device for backpacks or schoolbags

Abstract

The invention relates to an adjustment device for a backpack or schoolbag, in which height adjustment is particularly comfortable and simple for the carrier of the backpack or schoolbag, which adjustment device is cost-effective and simple to manufacture and has a long service life.

Description

Adjustable device for backpacks or school bags Technical Field

[0001] This invention relates to a backpack or schoolbag with a shoulder strap that can be fixed or secured to the outer side of the back wall of the backpack or schoolbag by means of an adjustment device. The adjustment device of the backpack or schoolbag has a housing with a basic rectangular shape, the housing having a housing bottom and a housing cover, wherein the housing bottom has a longitudinally extending guide bridge extending into the housing interior, the guide bridge forming a guide rail along which a slider is movable and lockable. The slider is indirectly connected to the shoulder strap by means of a carrier plate, and the shoulder strap is movably adjusted along the guide rail between two end positions or locked at the guide rail or the housing bottom in different positions, wherein the adjustment and / or locking is achieved by means of an operating element that is adjustable from a locked position to a released position and vice versa, wherein the slider is adjustable inside the housing, and the carrier plate is movable outside the housing cover along a slit-like recess constructed in the housing cover. Background Technology

[0002] Such backpacks or school bags are widely popular and highly sought after in the current technology.

[0003] Typically, two shoulder straps are positioned here for wearing and carrying the backpack or sack, making it possible for the wearer to carry the backpack or sack in an ergonomic and comfortable manner. Often, the two shoulder straps are close to each other in their upper region and therefore have a significantly smaller gap between them in the upper connection region with the backpack or sack compared to their lower region.

[0004] To enable comfortable and ergonomic carrying of the backpack or schoolbag, an adjustment mechanism is provided that allows for height adjustment of the shoulder strap relative to the backpack or schoolbag. This height adjustment allows the shoulder strap, or the backpack or schoolbag connected to the shoulder strap, to be positioned according to the wearer's height.

[0005] An adjustment device of this type is known, for example, from DE 10 2014 006 194 A1. This solution has proven effective. Here, height adjustment is achieved by manipulating an operating element that adjusts a deformable spring-locking element from a locking shape to a releasing shape and vice versa. In the locking shape, the spring-locking element secures the slider to the locking rail, while in the releasing shape, the spring-locking element releases the slider relative to the locking rail, thereby making the slider movable relative to the locking rail.

[0006] Here, height adjustment is achieved by means of an operating element arranged on the adjustment device on the outside, i.e., facing the back of the wearer.

[0007] Here, the operating element can be adjusted from the release position to the lock position by means of a coin and can be adjusted back, so as to first set the desired height and then fix the desired height in the lock position.

[0008] However, this adjustment can only be achieved when the backpack or schoolbag is not on the wearer's back, because the access to the operating elements located at or above the adjustment device is covered by the wearer's back in this carrying position. In practice, this means that the backpack or schoolbag must be removed from the back for height adjustment, then the height adjustment can be performed, and after being fixed in the currently set position, the backpack must be put back on the wearer's back.

[0009] If the set position is still unsatisfactory after wearing the garment, the process must be repeated.

[0010] This is both time-consuming and often perceived by consumers as undesirable.

[0011] Such a high degree of matching may be necessary, for example, in situations where clothing needs to be changed (e.g., a thicker jacket or similar). Summary of the Invention

[0012] Based on the prior art mentioned at the beginning, the present invention aims to create a backpack or schoolbag of the form mentioned at the beginning, wherein height adjustment is particularly comfortable and easy to achieve for the wearer of the backpack or schoolbag, and is cost-effective, easy to manufacture, and has a long service life.

[0013] To achieve this objective, the present invention proposes that the adjustment device, together with the slider, the carrier plate and the operating element, is not only arranged on or at the rear wall of the backpack or schoolbag, but also operable or operable from outside the backpack or schoolbag, wherein the adjustment of the carrier plate and therefore the shoulder strap relative to the adjustment device and therefore the height adjustment of the backpack or schoolbag is achieved steplessly and is also achieved even in the use position on the back of the wearer.

[0014] With the aid of such an adjustment device according to the invention, the backpack can be height-adjusted as desired at any time, even in the carrying position (that is, where the backpack is on the wearer's back). If, for example, the user notices that the backpack is positioned too high or too low due to the clothing, then even in the position worn on the back, a height match can be achieved for the wearer, thus resulting in a significant improvement in comfort.

[0015] The wearer is no longer forced to first remove the backpack or schoolbag from their back, then change the height, and then lock it in the corresponding position, as is the case in solutions known in the prior art.

[0016] This matching is usually done multiple times because the height adjustment cannot be set immediately in such a position on the back so that the backpack or schoolbag is in the optimal position for use on the wearer's back.

[0017] The height can be affected at any time by means of the solution according to the invention, that is, the operating element is manipulated even in the use position and thus the height adjustment is performed as desired.

[0018] Particularly preferably, each of the transverse side edges near the bottom of the housing has a recess and a ball receiving shaft arranged in the recess, wherein the two ball receiving shafts are surrounded by a ball chain extending between two parallel longitudinally extending guide bridges on the front side of the bottom of the housing and extending near the bottom of the housing on the rear side of the bottom of the housing, wherein the ball chain is force-fitted to the slider and adjusts the slider between terminal positions, wherein at least one of the ball receiving shafts has an actuation point or through-hole for an operating element, which twists the ball receiving shaft and thus adjusts the ball chain together with the slider, wherein the operating element can be locked in any position.

[0019] In this solution according to the invention, one of the ball-receiving shafts is twisted by means of an operating element, thereby indirectly adjusting the slider along with the carrier plate along the adjusting device between terminal positions via a ball chain. For this purpose, the user only needs to twist the operating element in the desired direction to achieve upward or downward height adjustment. In the case where the operating element is twisted by the user, the slider along with the carrier plate is adjusted. If, for example, a user of a backpack or schoolbag according to the invention wants to adjust the position of the backpack or schoolbag on their back, they only need to rotate the operating element in the corresponding direction to cause upward or downward adjustment. Once the user has set the desired height position by twisting the operating element, they can lock the operating element in that position to prevent undesirable adjustments.

[0020] It is particularly preferred that the actuating part is formed by a through hole with four or more edges, and the part of the operating element with a shape complementary to the through hole can be inserted into or be inserted into the through hole or arranged through the through hole.

[0021] This construction of not only the actuating element but also the operating element enables a particularly reliable and durable force transmission from the operating element to the ball receiving shaft, which adjusts the ball chain along with the slider and carrier plate disposed therein. Furthermore, such an operating element can be inserted into the through-hole according to the invention in a particularly quick and simple manner, so as to be shaped-fitted there and to transmit force by twisting the operating element, thus enabling the adjustment of the slider along with the carrier plate.

[0022] Alternatively, it can be particularly preferably configured such that the force of the operating element relative to the spring is held in the locked position.

[0023] This reliably prevents unintended adjustments to the height of the backpack or schoolbag because the operating element is locked in the locked position by the force of the spring according to the invention when not operated by the user. In practice, this means that to adjust the height, the user must move the operating element from the locked position (e.g., by pulling) against the force of the spring into the adjustable position. Once the user releases the operating element, it is automatically held in the locked position by the force of the spring, thus effectively preventing unintended adjustments.

[0024] Furthermore, it is particularly preferably configured that the operating element is composed of an operating shaft with an operating handle extending from the side of the housing of the adjusting device, wherein the operating shaft has a shape of a through hole that is complementary to a quadrangular or polygonal shape at its free end opposite to the operating handle and is arranged in and through the through hole in accordance with the shape of the end region, wherein a locking profile is arranged or constructed on the side of the ball receiving shaft opposite to the operating handle, the free end engaging into the locking profile in the locked position and being held anti-torsional by the locking profile therein.

[0025] With the aid of such an operating element according to the invention, the user can, even when the backpack or schoolbag is in the carrying position on the user's back, additionally adjust the height of the backpack or schoolbag at any time in such a simple form and manner by means of a handle to adjust the operating element extending from the adjustment device on the side. The operator only needs to turn the handle in the desired direction to achieve upward or downward height adjustment depending on the direction of the turn. Here, the operating element according to the invention is intuitive and therefore particularly easy to operate even for untrained users, exhibiting a particularly high level of comfort. The user no longer needs to remove the backpack or schoolbag from their back, adjust it, and then put it back on to adjust its height. The particularly quick and comfortable adjustment in the carrying position is therefore achieved quickly and easily even, for example, when changing clothes (which requires a corresponding match in the height of the backpack or schoolbag).

[0026] It is particularly preferable that the operating elements are arranged orthogonally to the adjustment direction of the slider and the carrier plate.

[0027] With this arrangement of the operating element, it can be particularly easy for the carrier of the backpack or schoolbag to grab and manipulate, because the operating element extends from the side by the adjustment device and can be grabbed at any time even when the backpack or schoolbag is worn on the back.

[0028] Furthermore, it is particularly preferred that the ball receiving shaft is composed of a hollow truncated cone-shaped section having grooves annularly on the outside and recesses evenly distributed around the periphery along the direction of the grooves, which is suitable for receiving and guiding the ball chain and the balls of the ball chain.

[0029] This ball-receiving shaft enables particularly reliable and durable adjustment of the carrier plate, which is fixed to the ball chain with a slider, and provides a long service life. Furthermore, the grooves and recesses distributed around the periphery enable reliable and precise guidance of the ball chain and the balls within it.

[0030] Furthermore, it is particularly preferred that the slider has a groove with a recess extending approximately in the middle of the slider and approximately parallel to the longitudinal extension of the adjusting device, wherein the balls of the ball chain are arranged in the groove and in the recess of the ball chain connecting the balls.

[0031] This design of the slider enables optimal force transmission from the ball chain to the slider and thus indirectly to the carrier plate.

[0032] Similarly, it is particularly preferred that the carrier plate and the shoulder strap be connected inseparably, especially by sewing, tightening, riveting or gluing.

[0033] This unbreakable connection between the carrier plate and the shoulder strap is a particularly durable solution and has proven effective in practice.

[0034] It is also particularly preferred that the slider be detachable and connected to or connected to the carrier plate, for example by means of a clamp.

[0035] Similarly, such a detachable connection between the slider and the carrier plate (which is usually achieved in practice by clamping) has proven to be an effective, cost-effective, and durable solution.

[0036] Finally, it is particularly preferably configured that a second cover is arranged on the rear side of the bottom of the housing facing the backpack or schoolbag, the second cover at least covering the ball chain, the second cover having a clamping device or clamping and guiding device that contacts and clamps the ball chain in the direction of the bottom of the housing.

[0037] The second cover according to the invention, located on the rear side of the bottom of the housing, protects the ball chain passing there on one hand and provides a certain self-braking effect to prevent undesirable adjustment in cases where the operating element is not in the locked position, for example, in the event of damage to the operating element or the like. Through the second cover, pressure is thus applied to the ball chain and brings it close to the bottom of the housing on the rear side. Consequently, the ball chain is pre-tensioned approximately against the rear side of the bottom of the housing, thereby creating resistance for adjusting the ball chain. Attached Figure Description

[0038] An embodiment of the present invention is shown in the accompanying drawings and is further described below.

[0039] in:

[0040] Figure 1 shows, in top view, the adjustment device according to the invention with the assembled carrier plate;

[0041] Figure 2 shows the adjustment device according to the present invention without a carrier plate;

[0042] Figure 3 shows the adjustment device according to the invention as viewed from the rear;

[0043] Figure 4 shows the adjustment device according to the invention in an exploded view taken at an angle from the front;

[0044] Figure 5 shows an exploded view of a backpack with shoulder straps and an adjustment device according to the invention. Detailed Implementation

[0045] The accompanying drawings show an adjustment device 1 for a backpack or schoolbag 18 with a shoulder strap 19. Here, the shoulder strap 19 is indirectly secured to the outer side of the rear wall of the backpack or schoolbag 18. The adjustment device 1 has a housing with a basic rectangular shape, including a housing bottom 2 and a housing cover (not shown in the drawings). The housing bottom 2 of the adjustment device 1 has a longitudinally extending guide bridge 3 extending into the interior of the housing, which forms a guide rail. Along this guide rail formed by the guide bridge 3, a slider 4 is movable and can be locked in a desired position. The slider 4 is connected to or can be connected to the shoulder strap 19 of the backpack or schoolbag 18 by means of a carrier plate 5. The carrier plate 5, together with the slider 4, is adjustable along the guide rail, wherein the adjustment is achieved between and limited by two end positions. Furthermore, the slider 4, together with the carrier plate 5, can be locked in a desired position to prevent undesirable adjustment. Here, adjustment and / or locking are achieved by means of an operating element adjustable from a locked position to a released position and vice versa.

[0046] The slider 4 is adjustable inside the housing, while the carrier plate 5 is adjustable outside the housing cover. Here, the adjustment of the carrier plate 5 is achieved along a slit-like recess constructed in the housing cover.

[0047] In this embodiment, the adjustment device 1, along with the slider 4, the carrier plate 5, and the operating element 6, is arranged on the outer side of the rear wall of the backpack or schoolbag 18, and can be operated from outside the backpack or schoolbag 18 when it is in the use position on the back of the wearer. Furthermore, according to the invention, the height adjustment of the carrier plate 5, and therefore the shoulder strap 19, relative to the adjustment device 1 is steplessly achieved. In this solution, the rear wall does not have openings or similar areas through which parts of the adjustment device 1 penetrate, thus completely protecting it from water or contaminant intrusion.

[0048] Alternatively, and not shown in the accompanying drawings, the adjusting device 1, together with the slider 4, can also be constructed on the inside of the rear wall of the backpack or schoolbag 18 or as part of the rear wall of the backpack or schoolbag 18. In this solution, not only the operating element 6 but also the carrier plate 5 extends outward through the rear wall.

[0049] With the aid of such a backpack or schoolbag 18 according to the invention, in particular, the additional height adjustment of the backpack or schoolbag 18 in the use position, i.e., in the position where the backpack or schoolbag 18 is on the back of the wearer, is achieved in a particularly quick and simple form and manner. Therefore, the backpack or schoolbag 18 can be fitted in the use position without having to remove the backpack or schoolbag 18 from the wearer's back.

[0050] According to the invention, as is particularly evident from FIG. 4, a recess and a ball-receiving shaft 7 are arranged on each of the rectangular lateral side edges or short side edges near the bottom of the housing 2. Here, the two ball-receiving shafts 7 are surrounded by a ball chain 8. The ball chain 8 extends on the front side of the bottom of the housing 2 between two parallel longitudinally extending guide bridges 3 and on the rear side of the bottom of the housing 2 near the bottom of the housing 2. Here, the ball chain 8 is force-fittedly connected to a slider 4 and adjusts the slider 4 between its end positions. Here, at least one of the ball-receiving shafts 7 has an actuation point or through-hole for the operating element 6. Therefore, by means of the operating element 6, force transmission to the corresponding ball-receiving shaft 7 is possible, which in turn adjusts the ball chain 8, which adjusts the slider 4 between its end positions through its force-fitted connection with the slider 4. After reaching the desired position, the operating element 6 can be locked in that position.

[0051] In this embodiment, the functional area is formed by a through hole 9 with four edges.

[0052] Alternatively, and not shown in the accompanying drawings, the through-hole 9 may also have a shape different from the quadrangular shape. In this embodiment, a portion of the operating element 6 with a shape complementary to that of the through-hole 9 is inserted into or can be inserted into the through-hole 9 and is arranged to pass through the through-hole 9. The operating element 6 is held in the locked position by the force of the spring 10, as is particularly evident in Figure 4. This ensures that the operating element 6 remains in the locked position when the adjusting device 1 or its operating element 6 is not operated, in order to prevent undesirable adjustments of the backpack or bag 18 relative to the shoulder strap 19.

[0053] According to the invention, the operating element 6 comprises an operating shaft with an operating handle 11 extending laterally from the housing of the adjusting device 1. This handle 11 can be operated manually at any time, even when the backpack or schoolbag 18 is in its use position on the back of the wearer, to facilitate height adjustment of the backpack or schoolbag 18. As is further apparent, particularly from FIG. 4, the operating shaft is constructed with a through-hole 9, complementary to the four-sided edges, at its free end opposite to the operating handle 11, and its shape fits through the through-hole. A locking profile 12 is arranged on the side of the ball-receiving shaft 7 opposite to the operating handle 11, into which the free end of the operating shaft of the operating element 6 engages and is held anti-torsional by its shape complementary to the through-hole 9. For adjustment, the user must slightly withdraw the operating element 6 from the locking profile 12 and then immediately adjust the adjusting device 1 to the desired height by twisting. The operating element 6 is then automatically locked by a spring 10, which forces the operating element 6 into the locking profile 12. This ensures that the operating element 6 is always in the locked position, thus preventing undesirable height adjustments.

[0054] For ease of operation, the operating element 6 is arranged orthogonally to the adjustment direction of the slider 4 and the carrier plate 5. Thus, the user can operate the operating element 6 or its operating handle 11, which extends from the side of the adjustment device 1, in a particularly simple manner around their body toward the backpack or schoolbag 18.

[0055] According to the present invention, the ball receiving shaft 7 is composed of a hollow truncated cone-shaped section, which has a groove 13 annularly on the outside and recesses 14 evenly distributed around the periphery along the direction of the groove 13. Here, not only the groove 13 but also the recesses 14 are used to receive and guide the ball chain 8 or the balls of the ball chain 8.

[0056] Furthermore, the slider 4 has a groove 15 extending approximately in the middle of the slider 4 and approximately parallel to the longitudinal extension of the adjusting device 1, with a recess 16. The portion of the ball chain 8 connecting the ball is arranged in the groove 15, and the ball of the ball chain 8 is arranged in the recess 16.

[0057] This makes it possible to transmit force particularly efficiently from the ball chain to the slider 4.

[0058] In known forms and methods, the carrier plate 5 and the shoulder strap 19 can be inseparably connected, for example by means of sewing, tightening, riveting, or gluing. Similarly, in known forms and methods, the slider 4 can be detachably connected to or attached to the carrier plate 5, for example by means of clamping.

[0059] As is particularly evident from Figure 4, according to the invention, a second cover 17 may be arranged on the rear side of the bottom 2 of the housing facing the backpack or schoolbag 18. Here, the second cover 17 at least covers the ball chain 8 to protect it from contact with or, for example, contaminants. Furthermore, the second cover 17 may have a clamping device or a clamping and guiding device that contacts and clamps or tightens the ball chain 8 in the direction of the bottom 2 of the housing. This creates a certain degree of self-locking during movement, thus preventing undesirable adjustment of the ball chain 8, thereby requiring a certain force to be applied to adjust the ball chain 8 together with the slider 4 and the carrier plate 5.

[0060] The invention is not limited to this embodiment, but is subject to repeated variations within the scope of this disclosure.

[0061] All individual and combined features disclosed in the specification and / or drawings are considered essential to the invention.

[0062] List of reference numerals

[0063] 1) Adjustment device

[0064] 2) Bottom of the casing

[0065] 3) Guide bridging section

[0066] 4) Slider

[0067] 5) Carrier plate

[0068] 6) Operating elements

[0069] 7) Sphere-containing axis

[0070] 8) Ball chain

[0071] 9) Through hole

[0072] 10) Spring

[0073] 11) Control handle

[0074] 12) Lock the outline

[0075] 13) The groove at 7)

[0076] 14) The concave area at point 7)

[0077] 15) The groove at position 4)

[0078] 16) The concave area at point 4)

[0079] 17) The second cover at 2)

[0080] 18) Schoolbag

[0081] 19) Shoulder straps.

Claims

1. A backpack or schoolbag with shoulder straps, the shoulder straps being fixable or secured to the outer side of the rear wall of the backpack or schoolbag by means of an adjustment device, the adjustment device having a housing with a basic rectangular shape, the housing having a housing bottom and a housing cover, wherein, The bottom of the housing has a longitudinally extending guide bridge that extends into the interior of the housing, the guide bridge forming a guide rail along which a slider is movable and lockable. The slider is indirectly connected to the shoulder strap via a carrier plate, which allows the carrier plate to be movably adjusted along the guide rail between two end positions or locked at the guide rail or the bottom of the housing in different positions. The adjustment and / or locking are achieved by means of an operating element that is adjustable from a locked position to a released position and vice versa. The slider is adjustable within the housing, and the carrier plate is movable outside the housing cover along a slit-like recess constructed in the housing cover. The adjustment device (1), together with the slider (4), the carrier plate (5), and the operating element (6), is not only arranged on the outside of the rear wall of the backpack or schoolbag (18), but also operable or operable from outside the backpack or schoolbag (18). The adjustment of the carrier plate (5) and therefore the shoulder strap (19) The height adjustment of the backpack or schoolbag (18) relative to the adjustment device (1) is steplessly achieved, even in the use position on the back of the carrier. Each of the two ball receiving shafts (7) is arranged with a recess and a ball receiving shaft (7) arranged in the recess on the lateral side edge near the bottom of the housing (2). The two ball receiving shafts (7) are surrounded by a ball chain (8), which extends on the front side of the bottom of the housing (2) between two parallel longitudinally extending guide bridges (3) and on the rear side of the bottom of the housing (2) near the bottom of the housing. The ball chain (8) is forcefully connected to the slider (4) and adjusts the slider between the terminal positions. At least one of the ball receiving shafts (7) has an actuation point or through-hole for the operating element (6), which twists the ball receiving shaft (7) and thus adjusts the ball chain (8) together with the slider (4). The operating element (6) can be locked in any position.

2. The backpack or schoolbag (18) according to claim 1, characterized in that, The actuating part or through-hole is formed by a four-sided or multi-sided through-hole (9), and the part of the operating element (6) with a shape complementary to the through-hole (9) can be inserted into or be inserted into the through-hole (9) or arranged through the through-hole (9).

3. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The operating element (6) is held in the locked position against the force of the spring (10).

4. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The operating element (6) is composed of an operating shaft with an operating handle (11) extending from the side of the housing of the adjusting device (1), wherein the operating shaft has a shape of a through hole (9) that is complementary to a quadrangular or polygonal shape at its free end opposite to the operating handle (11) and is arranged in the through hole (9) in accordance with the shape of the end region and passes through the through hole, wherein a locking profile (12) is arranged or constructed on the side of the ball receiving shaft (7) opposite to the operating handle (11), the free end engaging in the locking profile (12) in the locked position and being anti-torsionally held there by the locking profile (12).

5. The backpack or schoolbag (18) according to claim 4, characterized in that, The operating element (6) is arranged orthogonally to the adjustment direction of the slider (4) and the carrier plate (5).

6. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The ball receiving shaft (7) is composed of a hollow truncated cone-shaped section having a first groove (13) annularly on the outside and having first recesses (14) evenly distributed on the periphery of the hollow truncated cone-shaped section along the direction of the first groove (13), which is suitable for receiving and guiding the ball chain (8) and the balls of the ball chain (8).

7. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The slider (4) has a second groove (15) extending approximately in the middle of the slider (4) and approximately parallel to the longitudinal extension of the adjusting device (1), wherein the portion of the ball chain (8) connecting the ball is arranged in the second groove (15) and the ball of the ball chain (8) is arranged in the second recess (16).

8. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The carrier plate (5) is inseparably connected to the shoulder strap (19).

9. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, The slider (4) can be detachably connected to or connected to the carrier plate (5).

10. The backpack or schoolbag (18) according to claim 1 or 2, characterized in that, A second cover (17) is arranged on the rear side of the bottom (2) of the housing facing the backpack or schoolbag. The second cover covers at least the ball chain (8). The second cover has a clamping device or a clamping and guiding device that contacts and clamps the ball chain (8) in the direction of the bottom (2) of the housing.

11. The backpack or schoolbag (18) according to claim 8, characterized in that, The carrier plate (5) and the shoulder strap (19) are inseparably sewn, tightened, riveted or glued together.

12. The backpack or schoolbag (18) according to claim 9, characterized in that, The slider (4) can be detachably connected to or linked to the carrier plate (5) by means of clamping.

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