BACKPACK AND HEIGHT ADJUSTMENT MECHANISM

Description

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation of International Patent Application No. PCT/EP2023/072638, filed on Aug. 17, 2023, entitled BACKPACK AND HEIGHT ADJUSTMENT MECHANISM, and claims the benefit of priority thereof under 35 U.S.C. § 120.

INCORPORATION BY REFERENCE

The disclosure of International Patent Application No. PCT/EP2023/072638, filed on Aug. 17, 2023, entitled, BACKPACK AND HEIGHT ADJUSTMENT MECHANISM, is hereby incorporated by reference for all purposes as if set forth in its entirety.

FIELD

The technology relates to the field of backpacks, specifically those designed to carry and store power tools and power tool batteries. This field focuses on providing ergonomic, adjustable, and secure carrying solutions for users who need to transport power tools and related equipment while maintaining comfort and ease of use.

BACKGROUND

Backpacks are commonly used for carrying various items, including power tools and batteries, for both professional and recreational purposes. A comfortable and well-fitting backpack is essential for users to carry heavy loads for extended periods without experiencing discomfort or strain on their body. Traditional backpacks often have fixed shoulder and hip elements, which do not allow for customization based on the user's body size and height. This can result in discomfort and poor weight distribution, especially when carrying heavy loads such as power tools and batteries.

Some backpacks have adjustable components to accommodate users of different body sizes and heights. However, these adjustable components may have cumbersome locking mechanisms that are not easily adjusted. This can lead to an ill-fitting backpack during use, causing discomfort and instability for the user.

The process of adjusting some backpacks can be complicated and time-consuming, discouraging users from customising the backpack to their individual needs. For example, some backpacks may offer adjustable components as shown in EP3073855 and WO2019202315, but the difficulty of adjusting the backpack means the user is discouraged from doing so. This results in a suboptimal fit and reduced comfort for some users. For example, in EP3073855 and WO2019202315 the user must adjust the backpack with two hands and the adjustment mechanism may not be intuitive.

SUMMARY

In a first aspect of the disclosure there is provided a backpack for a power tool battery comprising a frame extending along a longitudinal axis; a harness mounted to the frame; and a height adjustment mechanism configured to adjust the position of at least a portion of the harness with respect to the frame, the height adjustment mechanism having a locking mechanism configured to selectively secure the portion of the harness with respect to the frame and a height adjustment mechanism actuator operatively coupled to the locking mechanism, wherein the height adjustment mechanism actuator is configured to be actuated in the same direction as the required movement of the portion of the harness with respect to the frame.

Optionally, the portion of the harness comprises a hip belt configured to engage a user's hip and/or lower back.

Optionally, the hip belt is moveable with respect to the frame along a direction parallel to the longitudinal axis.

Optionally, the height adjustment mechanism actuator is configured to move from a neutral position towards a first actuated position in a first actuator direction and release the locking mechanism, and to move from the neutral position towards a second actuated position in a second actuator direction and release the locking mechanism.

Optionally, the first actuator direction is parallel with the longitudinal axis and the second actuator direction is opposite to the first actuator direction.

Optionally, a lumbar support assembly is mounted to the frame, the lumbar support assembly being moveable between a first support position and a second support position along a direction parallel to the longitudinal axis.

Optionally, the height adjustment mechanism is mounted to the lumbar support assembly.

Optionally, the locking mechanism retractable locking fingers moveable between a locked position and a released position, the retractable locking fingers being configured to engage with reciprocal locking holes in the frame when in the locked position.

Optionally, the height adjustment mechanism actuator is operatively coupled to the retractable locking fingers and configured to move the retractable locking fingers between the locked position and the released position.

Optionally, the height adjustment mechanism actuator comprises an actuator biassing mechanism configured to bias the height adjustment mechanism actuator towards a neutral position away from the first or second actuated position.

Optionally, the actuator biassing mechanism comprises a first actuator spring and a second actuator spring wherein the first actuator spring and a second actuator spring are integral with the actuator body.

Optionally, the locking mechanism comprises a locking biassing mechanism configured to bias the retractable locking fingers into the locked position.

Optionally, the height adjustment mechanism actuator comprises slide ramps configured to engage and move slide pins parallel with a locking direction when the height adjustment mechanism actuator moves in the first actuator direction or the second actuator direction, the movement of the slide pins causing the retractable locking fingers to move between the locked position and the released position.

Optionally, the centre of gravity of the backpack remains substantially static with respect to the user when worn by the user when the portion of the harness moves with respect to the frame.

Optionally, the height adjustment mechanism is mounted to a housing rear cover and comprises a first actuator limiting stop and a second actuator limiting stop configured to limit the movement of the height adjustment mechanism actuator in the first actuator direction and the second actuator direction, respectively.

Optionally, the height adjustment mechanism actuator comprises a finger recess configured to allow a user to insert their fingers and push in the desired direction to unlock the locking mechanism and adjust the height of the backpack.

Optionally, the frame comprises a frame slot configured to receive a lumbar support housing, the lumbar support housing being slidably engaged with the frame slot and having different relative positions with respect to the frame slot.

Optionally, the frame slot comprises the reciprocal locking holes positioned in both a first slot side and a second slot side.

Optionally, the harness comprises shoulder straps and a hip belt, the shoulder straps being coupled to an upper frame portion and the hip belt being coupled to a lower frame portion.

In a second aspect of the disclosure there is provided a height adjustment mechanism for a backpack comprising: a locking mechanism configured to selectively secure a portion of a harness with respect to a frame of the backpack; and a height adjustment mechanism actuator operatively coupled to the locking mechanism, wherein the height adjustment mechanism actuator is configured to be actuated in the same direction as the required movement of the portion of the harness with respect to the frame.

In a third aspect of the disclosure there is provided a backpack for a power tool battery comprising: a frame extending along a longitudinal axis and a lower frame portion engageable with the ground; a harness mounted to the frame; and a height adjustment mechanism configured to adjust the position of at least a portion of the harness with respect to the frame, the height adjustment mechanism having a locking mechanism configured to selectively secure the portion of the harness with respect to the frame and a height adjustment mechanism actuator operatively coupled to locking mechanism, wherein the height adjustment mechanism is operatively coupled to a moveable foot and the moveable foot is moveable between an extended position when the moveable foot is engageable with the ground at the same time as the lower frame portion and a retracted position.

Optionally, the moveable foot is connected to a lumbar support assembly mounted to the frame, the lumbar support assembly being moveable between a first support position and a second support position along a direction parallel to the longitudinal axis.

Optionally, the height adjustment mechanism is mounted to the lumbar support assembly.

Optionally, the moveable foot projects away from the lumbar support assembly in a direction parallel with the longitudinal axis.

Optionally, the moveable foot and the lower frame portion are in contact with the ground when the lumbar support assembly is in the second support position, and the hip belt is raised above the ground and not in contact with the ground.

Optionally, the centre of gravity of the backpack is positioned above a footprint defined by the moveable foot and the lower frame portion when the moveable foot and the lower frame portion are in contact with the ground.

BRIEF DESCRIPTION OF THE DRAWINGS

Examples are described in more detail below with reference to the appended drawings.

FIG. 1 is an exploded perspective view of a backpack having a frame and a harness according to an example;

FIG. 2a is a perspective view of the backpack with a lumbar support assembly in a first support position, and FIG. 2b shows the backpack with the lumbar support assembly in a second support position according to an example;

FIG. 3 is an exploded perspective view of a height adjustment mechanism for the lumbar support assembly of the backpack according to an example;

FIG. 4a is a perspective view of a height mechanism actuator, FIG. 4b is a plan view of the height adjustment mechanism without the height mechanism actuator or a front cover, and FIG. 4c shows the height adjustment mechanism without a front cover according to an example;

FIG. 5a shows a perspective view of the height adjustment mechanism with the height mechanism actuator in a neutral position, FIG. 5b shows the height adjustment mechanism with the height mechanism actuator in a first actuator position, and FIG. 5c shows the height adjustment mechanism with the height mechanism actuator in a second actuator position according to an example;

FIGS. 6a, 6b, and 6c respectively show a sequence of close-up views of a locking mechanism of the height adjustment mechanism as the height mechanism actuator moves from the neutral position to the first actuator position or the second actuator position;

FIGS. 6d, 6e, and 6f respectively show a sequence of close-up views of a locking mechanism of the height adjustment mechanism as the height mechanism actuator moves from the second actuator position to the neutral position according to an example;

FIG. 7a is a perspective view of the height adjustment mechanism mounted in the backpack, and FIG. 7b is a plan view of the height adjustment mechanism mounted in the backpack according to an example;

FIG. 8a is an exploded perspective view of an alternative height adjustment mechanism, and FIG. 8b is a close-up perspective view of the alternative height adjustment mechanism according to an example;

FIGS. 9a, 9b, and 9c show cross-sectional views of the alternative height adjustment mechanism when the height mechanism actuator is in different positions according to an example;

FIG. 10a is a side view of the backpack with a moveable foot in a first position, and

FIG. 10b shows the backpack with the moveable foot in a second position according to an example; and

FIG. 11a is a side view of the backpack and the centre of gravity with a moveable foot in a first position, and FIG. 11b shows the backpack and the centre of gravity with the moveable foot in a second position according to an example.

DETAILED DESCRIPTION

FIG. 1 shows an exploded perspective view of a backpack 100 having a frame 102 and a harness 120 according to an example. The frame 102 has a backpack longitudinal axis 118 configured to receive a battery (not shown) for a power tool (not shown). In this way, when the battery is mounted to the backpack 100, the backpack 100 is a portable power source for the power tool.

The power source mounted in the backpack 100 can be any suitable power source configured to provide electrical power to the power tool. For example, the power source can be one or more battery packs. Additionally, or alternatively the power source can be a mains power source.

The power tool is connected to the backpack 100 via an electrical hose (not shown). The electrical hose comprises at least one electrical wire and electrically connects a power source (not shown) mounted on the backpack 100 with at least one electrical component in the power tool. The electrical hose is durable and flexible. This means that the power tool can be used remotely from the backpack 100 whilst still being powered from the power source mounted in the backpack 100. The electrical hose in some examples comprises an outer sheath configured to protect the internal electrical wires from caustic or corrosive materials and other mechanical damage.

In some examples, the power tool is a vibrating tool which comprises a motor (not shown) and is configured to drive an oscillating mass (not shown) to cause the power tool to vibrate. The use of a motor operatively connected to an oscillating mass to vibrate the power tool is known and will not be discussed in any further detail.

In use, the user inserts the vibrating tool into a wet concrete mix that has been poured at a worksite. The user grips the electrical hose with one or both hands as required. As the vibrating tool vibrates, the air bubbles in the wet concrete mix rise up in the wet cement mix and are expelled. The vibrating tool is connected via the electrical hose and is remote from the backpack 100.

However, the power tool can be any suitable power tool that is powered by a portable power source e.g., a battery (not shown). For example, the power tool can be an inspection light (not shown). Alternatively, the power tool can be a leaf blower or a vacuum cleaner with an integrated motor fan assembly configured to generate an air flow. In some other examples, the power tool can be any electrically powered tool such as a string trimmer, a hedge trimmer, a chain saw, grass shears, an angle grinder, a hammer drill, a reciprocating saw, a demolition hammer, a rammer, a plate compactor etc.

Hereinafter, the term power tool will be used to describe any suitable power tool powered by the battery (not shown) mounted on the backpack 100.

The harness 120 is designed to provide support and comfort to the user while wearing the backpack 100. The harness 120 is mounted to a shoulder panel 152 mounted on the frame 102 and the harness 120 includes shoulder straps e.g. a first shoulder strap 122 and a second shoulder strap 124 and a hip belt 128. The shoulder panel 152 is a separate component from the frame 102, however in other examples, the shoulder panel 152 is integral with the frame 102. The first and second shoulder straps 122, 124 are coupled to the shoulder panel 152 located on an upper frame portion 108, while the hip belt 128 is coupled to a lower frame portion 110. Optionally, in other examples, the first and second shoulder straps 122, 124 can be coupled to other parts of the frame 102 or e.g. directly to the upper frame portion 108 of the frame 102. FIG. 1 shows dotted lines from the harness 120 to where the first and second shoulder straps 122, 124 are coupled to the upper frame portion 108 and where the hip belt 128 is coupled to the lower frame portion 110.

As shown in FIG. 1, the frame 102 of the backpack 100 has a backpack longitudinal axis 118 and the frame 102 extends along the backpack longitudinal axis 118. In one or some examples, the frame 102 includes various components that contribute to the overall structure and functionality of the backpack 100.

The backpack 100 comprises a backpack housing 104. The backpack housing 104 is constructed from a clamshell type arrangement in some examples. The backpack housing 104 is arranged to house one or more components of the backpack 100 therein. The backpack housing 104 extends along the backpack longitudinal axis 118. The frame 102 is fixed to the backpack housing 104 and together the frame 102 and the backpack housing 104 form a rigid structure.

One such component mounted to the backpack housing 104 is a battery mounting 106. The battery mounting 106 is configured to securely receive a battery for powering the power tool remotely from the backpack 100. Other components such as electronics e.g. a battery controller (not shown) is mounted within the backpack housing 104. Battery controllers are known and will not be discussed in any further detail. The battery mounting 106 is configured to electrically and mechanically couple one or more batteries to the backpack 100. The battery mounting 106 provides a convenient and secure location for the user to store the power tool battery while using the backpack 100.

The frame 102 may optionally comprise a power tool mounting configured to securely receive a power tool. For example, the power tool mounting may be configured to receive and securely mount the power tool to the backpack 100 when not in use.

The frame 102 may comprise an upper frame portion 108 and a lower frame portion 110. The upper frame portion 108 is positioned near the user's shoulders when the backpack 100 is worn by the user. The lower frame portion 110 is positioned near the user's hips when worn by the user. Furthermore, the lower frame portion 110 is engageable with the ground 1002 (best shown in FIG. 10). This engagement with the ground 1002 provides additional stability to the backpack 100 when the user is not wearing it or when the user is adjusting the backpack 100. The harness 120 will be discussed in more detail below.

In one or some examples, the frame 102 may define a protective cage 112. The frame 102 and hence the protective cage 112 is optionally constructed with tubular struts. The tubular struts may be manufactured from metal e.g., aluminium, or other suitable material such as plastic. The battery mounting 106 is positioned within the protective cage 112 such that the protective cage 112 provides protection for the battery when the battery is mounted to the battery mounting 106. The protective cage 112 may also contribute to the overall structural integrity of the backpack 100. Accordingly, the frame 102 defines a volume within the protective cage 112 where one or more elements e.g., the battery, the battery mounting 106, and the backpack housing 104 are protected from shocks and impacts which may occur on a worksite environment.

The frame 102 may further comprise a first frame side 114 and a second frame side 116. The first frame side 114 is adjacent to a first user side when worn by the user, while the second frame side 116 is adjacent to a second user side when worn by the user.

As shown in FIG. 1, the harness 120 comprises various components that contribute to the overall comfort and adjustability of the backpack 100 which will now be discussed in more detail.

As mentioned above, the harness 120 may comprise the first shoulder strap 122 and the second shoulder strap 124. The first shoulder strap 122 and the second shoulder strap 124 are arranged to be worn on the shoulders of a user. The harness 120 may also comprise a hip belt 128 arranged to engage the hips and lower back of the user. The hip belt 128 comprises a first hip belt arm 136 and a second hip belt arm 138.

The first shoulder strap 122 is coupled to the upper frame portion 108 and the first hip belt arm 136, while the second shoulder strap 124 is coupled to the upper frame portion 108 and the second hip belt arm 138. The first shoulder strap 122 comprises a first shoulder strap adjustment buckle 132 and the second shoulder strap 124 comprises a second shoulder strap adjustment buckle 134. The first and second shoulder strap adjustment buckles 132, 134 allow the user to customise the fit and tightness of the backpack 100 for optimal comfort and support.

As mentioned above, the harness 120 may comprise a hip belt 128 that includes a first hip belt arm 136 and a second hip belt arm 138. The first hip belt arm 136 is coupled to a lumbar support assembly 202 on the first frame side 114, while the second hip belt arm 138 is coupled to the lumbar support assembly 202 on the second frame side 116. The lumbar support assembly 202 is shown in more detail with respect to FIGS. 2a and 2b and will be discussed in more detail below.

The hip belt 128 may comprise at least one hip belt adjustment buckle 140 mounted on a first hip belt strap 142 connected to the first hip belt arm 136. The hip belt 128 may comprise another one hip belt adjustment buckle 140 mounted on a second hip belt strap 144 connected to the second hip belt arm 138. The hip belt adjustment buckle 140 allows the user to customise the fit and tightness of the hip belt 128 on the backpack 100. The first hip belt strap 142 and the second hip belt strap 144 respectively comprise a first hip belt connecting part 148 and a second hip belt connecting part 150 forming a hip belt connecting buckle 146. The hip belt connecting buckle 146 releasably secures the hip belt 128 around the user's hips.

In one or some examples, the harness 120 may comprise a sternum strap 126 that includes a sternum connecting buckle 130. The sternum strap 126 and the sternum connecting buckle 130 are designed to keep the first and second shoulder straps 122, 124 in place while the user wears the backpack 100.

Turning to FIGS. 2a and 2b, the lumbar support assembly 202 will now be discussed in more detail. In FIG. 2a, the backpack 100 is shown with a lumbar support assembly 202 in a first support position. In FIG. 2b, the backpack 100 is shown with the lumbar support assembly 202 in a second support position. The lumbar support assembly 202 is mounted to the frame 102 and is moveable between the first support position and the second support position along a direction parallel to the backpack longitudinal axis 118.

In one example, the backpack 100 comprises a lumbar support assembly 202 and a height adjustment mechanism 300 that work together to provide optimal support and comfort for the user while wearing the backpack 100. The height adjustment mechanism 300 is best shown in FIGS. 3, 4, 5a to 5c, 6a to 6f and 7a, 7b and is discussed in more detail with respect to these Figures below.

Turning back to FIGS. 2a and 2b, the lumbar support assembly 202 is mounted to the frame 102 and is moveable along a direction parallel to the backpack longitudinal axis 118. This allows the user to adjust the position of the lumbar support assembly 202 to better suit their body shape and size, ensuring a comfortable and secure fit.

In some examples, the lumbar support assembly 202 comprises a lumbar support 204 configured to engage a user's back. The lumbar support 204 is moveable between a first support position and a second support position along a direction parallel to the backpack longitudinal axis 118. When the lumbar support 204 is in the first support position as shown in FIG. 2a, the lumbar support assembly 202 is in position closest to the upper frame portion 108. This means that the backpack 100 is in a compact arrangement when the lumbar support assembly 202 and the lumbar support 204 is in the first support position. The user may choose to place the backpack 100 with the lumbar support assembly 202 in the first support position when transporting the backpack 100 e.g. in a vehicle.

FIGS. 2a and 2b do not show the harness 120 for the purposes of clarity. Although not shown in FIG. 2a or 2b, the hip belt 128 e.g., the first hip belt arm 136 and the second hip belt arm 138 are fixed with respect to the lumbar support assembly 202. FIG. 10b shows the hip belt 128 connected to the lumbar support 204. This means that when the lumbar support assembly 202 and the lumbar support 204 move, so does the hip belt 128. In this way, both the hip belt 128 and the lumbar support 204 together support the user's back and hips.

When the lumbar support 204 is in the second support position as shown in FIG. 2b, the lumbar support assembly 202 is in position furthest from the upper frame portion 108. This means that the backpack 100 is in an extended arrangement when the lumbar support assembly 202 and the lumbar support 204 is in the second support position. In some examples there can be any suitable number of intermediate support positions between the first support position and the second support position respectively shown in FIGS. 2a and 2b.

The lumbar support assembly 202 may also comprise a lumbar support connection element 206 connected between the lumbar support 204 and the lumbar support housing 208. The lumbar support connection element 206 projects in a direction perpendicular from the backpack longitudinal axis 118 and is configured to move together with the lumbar support 204 when moving between the first support position and the second support position. In this way, the lumbar support 204 projects towards the user's back from the backpack 100 when the user wears the backpack 100.

In some examples, the lumbar support assembly 202 optionally comprises a moveable foot 1000 (best shown in FIGS. 10a, 10b, 11a and 11b). The moveable foot 1000 is configured to engage the ground 1002 and increase the stability of the backpack 100 when resting on the ground 1002. The moveable foot 1000 is discussed in more detail below.

In order to adjust the position of the lumbar support assembly 202 and the hip belt 128 with respect to the frame 102, the user actuates a height adjustment mechanism 300. FIG. 3 illustrates an exploded perspective view of a height adjustment mechanism 300 for the lumbar support assembly 202 of the backpack 100 according to an example.

The height adjustment mechanism 300 is configured to adjust the position of at least a portion of the harness 120 with respect to the frame 102. As mentioned above, the portion of the harness 120 is the hip belt 128 mounted to the lumbar support assembly 202 and the hip belt 128 moves together with the lumbar support assembly 202 when the height adjustment mechanism 300 is actuated.

The examples discussed in reference to the Figures show the portion of the harness 120 is the hip belt 128 which is moved with respect to the frame 102 when the height adjustment mechanism 300 is actuated. However, in other examples, the position of other portions of the harness 120 can be adjusted with the height adjustment mechanism 300. For example, the position of the first and second shoulder straps 122, 124 with respect to the frame 102 can be adjusted alternatively or additionally with the height adjustment mechanism 300. In this case, the first and second shoulder straps 122, 124 can alternatively or additionally be mounted to the lumbar support assembly 202.

The backpack 100 is designed to maintain a substantially static centre of gravity 1004 with respect to the user when worn, even when the portion of the harness 120, such as the hip belt 128, is adjusted with respect to the frame 102. This feature provides optimal support and comfort for the user, as the backpack 100 remains balanced and does not shift its weight distribution during adjustments. This means that the user can adjust backpack 100 whilst wearing the backpack 100.

Turning back to FIG. 3, the height adjustment mechanism 300 will be discussed in reference to the example wherein the hip belt 128 is mounted to the lumbar support assembly 202. The height adjustment mechanism 300 is shown in isolation in FIG. 3, however, the height adjustment mechanism 300 is mounted to the lumbar support assembly 202 and selectively adjusts the position of the lumbar support assembly 202 with respect to the frame 102. The height adjustment mechanism 300 can be secured to the lumbar support assembly 202 via one or more screw fastenings (not shown). In some other examples one or more other fastenings alternatives can be used e.g. clamps, clips, adhesive, ultrasonic welding etc. In other examples, the height adjustment mechanism 300 can be alternatively integral (not shown) with the lumbar support assembly 202.

The height adjustment mechanism 300 comprises a locking mechanism 312 configured to selectively secure the portion of the harness 120 with respect to the frame 102 and a height adjustment mechanism actuator 310 operatively coupled to the locking mechanism 312.

The height adjustment mechanism actuator 310 is configured to be actuated in the same direction as the required movement of the portion of the harness 120 with respect to the frame 102. This provides a more intuitive and natural method for users to adjust the height of the portion of the harness 120, simplifying the adjustment process and enhancing user control and precision.

FIGS. 5a, 5b, and 5c respectively show a perspective view of the height adjustment mechanism 300 with the height adjustment mechanism actuator 310 in a neutral position, a first actuator position, and a second actuator position according to an example.

In some examples, the height adjustment mechanism actuator 310 is configured to move from a neutral position towards a first actuated position in a first actuator direction along an actuator movement axis 314 and release the locking mechanism 312. The neutral position of the height adjustment mechanism actuator 310 is shown in FIG. 5a. The first actuated position and the first actuator direction of the height adjustment mechanism actuator 310 are shown in FIG. 5b. In this way, the user moves the height adjustment mechanism actuator 310 in the first actuator direction towards the upper frame portion 108 along the actuator movement axis 314 and moves the lumbar support 204 and the hip belt 128 towards the upper frame portion 108.

The height adjustment mechanism actuator 310 is also configured to move from the neutral position as shown in FIG. 5a towards a second actuated position in a second actuator direction along the actuator movement axis 314 and release the locking mechanism 312. The second actuated position and the second actuator direction of the height adjustment mechanism actuator 310 are shown in FIG. 5c. Similarly, the user moves the height adjustment mechanism actuator 310 in the second actuator direction along the actuator movement axis 314 away from the upper frame portion 108 and moves the lumbar support 204 and the hip belt 128 away from the upper frame portion 108.

The extent of the movement of the height adjustment mechanism actuator 310 along the actuator movement axis 314 is shown by the distance X1 in FIG. 4c.

In some examples, the movement of the height adjustment mechanism actuator 310 is limited within the adjustment mechanism housing 302. In some examples, the housing rear cover 306 comprises a first actuator limiting stop 418 and a second actuator limiting stop 420. The first actuator limiting stop 418 and the second actuator limiting stop 420 are configured to limit the movement of the height adjustment mechanism actuator 310 in the first actuator direction and the second actuator direction, respectively. The first actuator limiting stop 418 and a second actuator limiting stop 420 are part of an adjustment mechanism housing 302 in some examples. The first and second actuator limiting stops 418, 420 ensure that the height adjustment mechanism actuator 310 does not move beyond its intended range of motion, preventing damage to the height adjustment mechanism actuator 310 or the locking mechanism 312 and maintaining the overall integrity and functionality of the height adjustment mechanism 300.

The height adjustment mechanism actuator 310 comprises an actuator body 404 with a first limiting edge 414 and a second limiting edge 416. The first limiting edge 414 is configured to engage the first actuator limiting stop 418 to limit the movement of the height adjustment mechanism actuator 310 in the first actuator direction. Similarly, the second limiting edge 416 is configured to engage the second actuator limiting stop 420 to limit the movement of the height adjustment mechanism actuator 310 in the second actuator direction.

The actuator body 404 further comprises guiding edges 412 as shown in FIG. 4a which are configured to engage the housing rear cover side walls 424. This means that the guiding edges 412 are configured to guide the height adjustment mechanism actuator 310 in the first actuator direction or the second actuator direction along the actuator movement axis 314. In combination, the guiding edges 412 and housing rear cover side walls 424 prevent the sideways movement of the height adjustment mechanism actuator 310 in a direction perpendicular to the actuator movement axis 314.

In some examples, the height adjustment mechanism actuator 310 is positioned in the adjustment mechanism housing 302 with one or more projecting ribs 422. The projecting ribs 422 project from the housing rear cover 306. The projecting ribs 422 are configured to position the height adjustment mechanism actuator 310 from the housing rear cover 306 so that the locking mechanism 312 is mounted between the housing rear cover 306 and the height adjustment mechanism actuator 310.

The first actuator direction is parallel with the backpack longitudinal axis 118. The second actuator direction also is parallel with the backpack longitudinal axis 118. The second actuator direction is opposite to the first actuator direction. As mentioned above, the first actuator direction and second actuator direction are along the actuator movement axis 314. In some examples, the actuator movement axis 314 is optionally coaxial or in the same plane as the backpack longitudinal axis 118.

The height adjustment mechanism 300 comprises an adjustment mechanism housing 302 which is mounted to the lumbar support assembly 202. In some other examples (not shown), the height adjustment mechanism 300 can be integral with the lumbar support assembly 202. The adjustment mechanism housing 302 comprises a housing front cover 304 and a housing rear cover 306. The housing front cover 304 and the housing rear cover 306 are connected together by one or more fastenings e.g. screws, clips or adhesive. The adjustment mechanism housing 302 secures and guides the height adjustment mechanism actuator 310 and locking mechanism 312, which are described in more detail below.

The housing front cover 304 comprises a user interface window 308. The user interface window 308 is configured to provide access to the height adjustment mechanism actuator 310 for the user. The user can insert their fingers through the user interface window 308 in order to actuate the height adjustment mechanism actuator 310.

In some examples, the height adjustment mechanism actuator 310 comprises a finger recess 406, which is configured to allow the user to insert their fingers and push in the desired direction to unlock the locking mechanism 312 and adjust the height of the hip belt 128.

The height adjustment mechanism 300 will also be described in reference to FIGS. 4a, 4b and 4c. In FIG. 4a, a perspective view of a height adjustment mechanism actuator 310 is shown. FIG. 4b presents a plan view of the height adjustment mechanism 300 without the height adjustment mechanism actuator 310 or the housing front cover 304. FIG. 4c displays the height adjustment mechanism 300 including the height adjustment mechanism actuator 310 and the locking mechanism 312 but without the housing front cover 304 according to an example.

In some examples, the locking mechanism 312 comprises first and second locking fingers 426, 428 which are moveable between a locked position and a released position. The first and second locking fingers 426, 428 are configured to engage with reciprocal locking holes 704 in the frame slot 200 when in the locked position. The frame slot 200 receives the lumbar support assembly 202 and the lumbar support assembly 202 is slidable within the frame slot 200 when the lumbar support assembly 202 is moved between the first support position and the second support position.

FIG. 4b shows two first locking fingers 426 and two second locking fingers 428. However, in other examples there can be any number of first and second locking fingers 426, 428. For example, there can be one, three, four etc, first and second locking fingers 426, 428.

The plurality of reciprocal locking holes 704 define a plurality of different positions for the lumbar support assembly 202 with respect to the frame 102.

When the first and second locking fingers 426, 428 are engaged with the reciprocal locking holes 704 in the frame slot 200, this secures the lumbar support assembly 202 with respect to the frame 102. This ensures that the lumbar support assembly 202 remains securely fixed with respect to the frame 102 during use.

The height adjustment mechanism actuator 310 is operatively coupled to the locking mechanism 312 and the first and second locking fingers 426, 428. Accordingly, the height adjustment mechanism actuator 310 is configured to move the retractable first and second locking fingers 426, 428 between the locked position and the released position. This allows the user to easily adjust the position of the lumbar support assembly 202 by actuating the height adjustment mechanism actuator 310.

In some examples, the height adjustment mechanism actuator 310 comprises an actuator biassing mechanism 316 configured to bias the height adjustment mechanism actuator 310 towards a neutral position away from the first or second actuated positions. That is, when the user does not exert a force on the height adjustment mechanism actuator 310, the height adjustment mechanism 300 returns to the neutral position arrangement as shown in FIG. 5a. This ensures that the height adjustment mechanism actuator 310 returns to a neutral position when not being actively adjusted, maintaining stability and preventing accidental movement.

The actuator biassing mechanism 316 may comprise a first actuator spring 400 and a second actuator spring 402, both integral with the actuator body 404. The first actuator spring 400 biases the height adjustment mechanism actuator 310 towards a neutral position away from the first actuated position, while the second actuator spring 402 biases the height adjustment mechanism actuator 310 towards a neutral position away from the second actuated position. However, in other examples, the first actuator spring 400 and the second actuator spring 402 can be any suitable biassing element such as a compression spring. In this case, the actuator biassing mechanism 316 may not be integral with the actuator body 404 and formed as a separate component.

In some examples, the locking mechanism 312 may comprise a locking biassing mechanism 436 configured to bias the first and second locking fingers 426, 428 into the locked position. This ensures that the locking mechanism 312 remains engaged and securely holds the lumbar support assembly 202 in place, preventing unintentional release or movement of the lumbar support assembly 202 during use.

The locking biassing mechanism 436 may include a first locking spring 432 and a second locking spring 434, both integral with the first locking fingers 426 and the second locking fingers 428. The first locking spring 432 and the second locking spring 434 are connected between the first locking fingers 426 and the second locking fingers 428.

Since the first locking spring 432, the second locking spring 434, the first locking fingers 426 and the second locking fingers 428 are integral, the locking mechanism 312 is a single unitary element. However, in other examples, the first locking spring 432 and the second locking spring 434 can be any suitable biassing element such as a compression spring. In this case, the first locking fingers 426 and the second locking fingers 428 would be separate elements.

The first locking fingers 426 and the second locking fingers 428 are configured to move parallel to the locking mechanism movement axis 430 as shown in FIG. 4b. The locking mechanism movement axis 430 is a dotted line through the centre of one of the first locking fingers 426 and the second locking fingers 428, however all the first and second locking fingers 426, 428 are configured to move parallel to the locking mechanism movement axis 430.

The locking mechanism 312 comprises a locking guide mechanism 438 as shown in FIG. 4b. The locking guide mechanism 438 is configured to guide the first locking fingers 426 and the second locking fingers 428 along a locking direction parallel with the locking mechanism movement axis 430. The locking direction is the direction of movement of the first and second locking fingers 426, 428 between the locked position and the released position.

The locking guide mechanism 438 may comprise a central tongue portion 440 and a locking guide slot 442 configured to engage the central tongue portion 440. The central tongue portion 440 is fixed to the housing rear cover 306. In some examples, the central tongue portion 440 is integral with the housing rear cover 306 and projects therefrom. This engagement ensures that the first and second locking fingers 426, 428 move smoothly and accurately between the locked and released positions, providing a reliable and precise adjustment mechanism for the user.

The extent of the movement of the first locking fingers 426 and the second locking fingers 428 along locking mechanism movement axis 430 is shown by the distance X2 in FIG. 4b. In some examples, the movement of the first locking fingers 426 and the second locking fingers 428 into retracted position results in the first locking fingers 426 and the second locking fingers 428 being retracted into the adjustment mechanism housing 302. The first locking fingers 426 and the second locking fingers 428 retract though the housing finger holes 318.

As mentioned, the height adjustment mechanism actuator 310 is operatively coupled to the locking mechanism 312. This will now be discussed in more detail with respect to FIGS. 6a to 6f.

FIGS. 6a, 6b, and 6c respectively show a sequence of close-up views of the locking mechanism 312 of the height adjustment mechanism 300 as the height adjustment mechanism actuator 310 moves from the neutral position to the first actuator position or the second actuator position. FIGS. 6d, 6e, and 6f present a sequence of close-up views of the locking mechanism 312 of the height adjustment mechanism 300 as the height adjustment mechanism actuator 310 moves from the second actuator position to the neutral position. The locking mechanism 312 includes retractable locking fingers that move between a locked and a released position along the locking mechanism movement axis 430.

The height adjustment mechanism actuator 310 is operatively coupled to the locking mechanism 312 via a first guiding ramp surface 408 and a second guiding ramp surface 410 mounted on the height adjustment mechanism actuator 310 with one or more slide pins 444 mounted on the first locking fingers 426 and the second locking fingers 428. Each first and second locking finger 426, 428 optionally has a respective slide pin 444 and a corresponding first guiding ramp surface 408 and a second guiding ramp surface 410. In some alternative examples, the one or more slide pins 444 can be mounted remote from the first locking fingers 426 and the second locking fingers 428. For example, the one or more slide pins 444 can be mounted in any suitable position.

The first guiding ramp surface 408 is configured to engage and move the slide pin 444 parallel with the locking direction when the height adjustment mechanism actuator 310 moves in the second actuator direction as shown in FIG. 6b. This causes the first locking fingers 426 and the second locking fingers 428 to retract as shown in FIG. 6b.

The second guiding ramp surface 410 is configured to engage and move the slide pin 444 parallel with the locking direction when the height adjustment mechanism actuator 310 moves in the first actuator direction as shown in FIG. 6c. This also causes the first locking fingers 426 and the second locking fingers 428 to retract as shown in FIG. 6c.

Since the slide pins 444 are fixed with respect to first locking fingers 426 and the second locking fingers 428, the movement of the slide pin 444 causes the first locking fingers 426 and the second locking fingers 428 to move between the locked position and the released position.

When the user lets go of the height adjustment mechanism actuator 310, the height adjustment mechanism actuator 310 is urged to the neutral position as shown in FIG. 6e. The first guiding ramp surface 408 or the second guiding ramp surface 410 is now no longer in contact with the slide pin 444 and the locking biassing mechanism 436, urges the first and second locking fingers 426, 428 back into the locked position.

In FIG. 7a, a perspective view shows the height adjustment mechanism 300 mounted in the backpack 100. FIG. 7b shows a plan view of the height adjustment mechanism 300 mounted in the backpack 100. In FIGS. 7a and 7b, the different reciprocal locking holes 704 are shown.

As mentioned above, in some examples, the backpack 100 comprises a frame slot 200 and a lumbar support assembly 202 that interact with each other to provide adjustable support and comfort for the user. The frame slot 200 is configured to receive the lumbar support housing 208 of the lumbar support assembly 202, allowing the lumbar support assembly 202 to be slidably engaged with the frame slot 200 and have different relative positions with respect to the frame slot 200.

In one example, the frame slot 200 comprises reciprocal locking holes 704 positioned in both a first slot side 700 and a second slot side 702. The reciprocal locking holes 704 are configured to engage with the first and second locking fingers 426, 428 of the height adjustment mechanism 300 when the first and second locking fingers 426, 428 are in the locked position. This configuration allows the lumbar support assembly 202 to be securely fixed with respect to the frame 102 at various mounting heights, providing customizable support for the user.

The frame slot 200 may comprise a first slot side 700 and a second slot side 702, which are adjacent to the first and second user sides, respectively, when the backpack 100 is worn by the user. The first and second slot sides 700, 702 may be configured to receive the lumbar support housing 208 and guide its movement along the backpack longitudinal axis 118.

The reciprocal locking holes 704 in the frame slot 200 define a plurality of different mounting heights for the hip belt 128, allowing the user to adjust the position of the hip belt 128 with respect to the frame 102 for optimal support and comfort. The different mounting heights provide a range of adjustability to accommodate users of various body sizes and shapes, ensuring a comfortable and secure fit for a wide range of users.

FIGS. 8a and 8b illustrate an exploded perspective view and a close-up perspective view, respectively, of an alternative height adjustment mechanism 800 according to another example. The alternative height adjustment mechanism 800 includes an alternative height adjustment mechanism actuator 802 that is operatively coupled to an alternative locking mechanism 816 within the backpack 100.

FIGS. 9a, 9b, and 9c present cross-sectional views of the alternative height adjustment mechanism 800 when the alternative height adjustment mechanism actuator 802 is in different positions. The alternative height adjustment mechanism actuator 802 is configured to move between a neutral position and a first and second actuated position.

The alternative height adjustment mechanism 800 is similar to the previously discussed height adjustment mechanism 300. That is, the height adjustment mechanism actuator 802 of the alternative height adjustment mechanism 800 is configured to be actuated in the same direction as the required movement of the portion of the harness 120 with respect to the frame 102.

In some examples, the backpack 100 may comprise an alternative height adjustment mechanism 800 configured to adjust the position of at least a portion of the harness 120 with respect to the frame 102. The alternative height adjustment mechanism 800 may include an alternative height adjustment mechanism actuator 802 operatively coupled to an alternative locking mechanism 816.

In one example, the alternative height adjustment mechanism actuator 802 may be configured to move from a neutral position towards a first actuated position in a first actuator direction and release the alternative locking mechanism 816. The actuator may also be configured to move from the neutral position towards a second actuated position in a second actuator direction and release the alternative locking mechanism 816. The first actuator direction may be parallel with the backpack longitudinal axis 118, and the second actuator direction may be opposite to the first actuator direction.

The alternative height adjustment mechanism actuator 802 comprises an alternative first guiding surface 900 and alternative second guiding surface 902. The alternative first guiding surface 900 is configured to engage and move the first and/or second locking bits 818, 820 when the alternative height adjustment mechanism actuator 802 moves in the first actuator direction. The alternative second guiding surface 902 is configured to engage and move the first and/or second locking bits 818, 820 when the alternative height adjustment mechanism actuator 802 moves in the second actuator direction. In this way, functionally the alternative height adjustment mechanism 800 is similar to the height adjustment mechanism 300 except that how the alternative height adjustment mechanism actuator 802 is operatively couples with the alternative locking mechanism 816 differs.

The alternative locking mechanism 816 may comprise retractable locking bits e.g. a first locking bit 818 and a second locking bit 820 that are moveable between a locked position and a released position. In the locked position, the first and second locking bits 818, 820 may engage with reciprocal locking bit holes 904 in the frame 102, and in the released position, the first and second locking bits 818, 820 may disengage with the reciprocal locking bit holes 904 in the frame 102. The direction of movement of the first and second locking bits 818, 820 between the locked position and the released position may be perpendicular to the direction of movement of the alternative height adjustment mechanism actuator 802. Figures show the first and second locking bits 818, 820 e.g. two locking bits 818, 820 however, in other examples there can be any suitable number of locking bits 818, 820. For example, alternative locking mechanism 816 may comprise a single locking bit 818. This may make the construction of the alternative locking mechanism 816 simpler. Alternatively, in other examples, the alternative locking mechanism 816 can comprise a larger number of locking bits 818, 820 e.g. three, four, five, six, etc. Providing a larger number of locking bits 818, 820 may provide a more secure connection for the alternative locking mechanism 816.

The alternative locking mechanism 816 may comprise a locking bit camming surface 824 as shown in FIGS. 9a, 9b, and 9c. The locking bit camming surface 824 is configured to urge the first and second locking bits 818, 820 into the released position from the locked position when the alternative height adjustment mechanism actuator 802 is moved. Movement of the alternative height adjustment mechanism actuator 802 is shown between FIGS. 9a, 9b, and 9c. The arrangement as shown in FIGS. 8a, 8b, 9a, 9b, 9c does not require a locking mechanism biassing mechanism.

In some examples, the alternative height adjustment mechanism actuator 802 may comprise an actuator biassing mechanism 804 configured to bias the alternative height adjustment mechanism actuator 802 towards a neutral position away from the first or second actuated position. The actuator biassing mechanism 804 may comprise a first actuator spring 806 and a second actuator spring 808. The first actuator spring 806 and the second actuator spring 808 are retained with a spring holder 810. The spring holder 810 is fixed with respect to the alternative height adjustment mechanism actuator 802. The spring holder 810 ensures that the first actuator spring 806 and the second actuator spring 808 remain secured with respect to the alternative height adjustment mechanism actuator 802. The first actuator spring 806 may bias the alternative height adjustment mechanism actuator 802 towards a neutral position away from the first actuated position, while the second actuator spring 808 may bias the alternative height adjustment mechanism actuator 802 towards a neutral position away from the second actuated position.

In one example, the alternative locking mechanism 816 may comprise first locking bits 818 arranged on a side of the alternative height adjustment mechanism 800 facing the backpack 100 and configured to engage with reciprocal locking bit holes 904 in the frame 102. The alternative locking mechanism 816 may also comprise second locking bits 820 arranged on a side of the alternative height adjustment mechanism 800 facing the backpack 100 and configured to engage with reciprocal locking bit holes 904 in the frame 102. The first and second locking bits 818, 820 may be mounted in locking bit pockets 822 in the lumbar support assembly 202 to guide the movement of the locking bits.

In some examples, the alternative height adjustment mechanism actuator 802 may comprise a finger recess 814 configured to allow a user to insert their fingers and push in the desired direction to unlock the alternative locking mechanism 816 and adjust the height of the backpack 100. The finger recess 814 may provide a more intuitive and natural method for users to adjust the height of the hip belt 128, simplifying the adjustment process and enhancing user control and precision.

The finger recess 814 may be configured to provide access to the alternative height adjustment mechanism actuator 802 for the user. The user can insert their fingers through the finger recess 814 in order to actuate the alternative height adjustment mechanism actuator 802 and release the alternative locking mechanism 816, allowing the user to adjust the height of the backpack 100. This is similar to the height adjustment mechanism 300 as previously discussed.

FIGS. 10a and 10b provide side views of the backpack 100 including a movable foot 1000 in a first position (FIG. 10a) and in a second position (FIG. 10b) according to an example. The movable foot 1000 is designed to engage the ground 1002 when the lower frame portion 110 is in contact with the ground 1002, providing an overall increase in stability for the backpack 100.

The moveable foot 1000 is connected to the lumbar support 204 The moveable foot 1000 is operatively coupled to the height adjustment mechanism 300 and is moveable between an extended position, when the moveable foot 1000 is engageable with the ground 1002 at the same time as the lower frame portion 110, and a retracted position. The moveable foot 1000 provides additional stability to the backpack 100 when engaged with the ground 1002, preventing the backpack 100 from toppling over during use or adjustment.

FIGS. 11a and 11b respectively illustrate a side view of the backpack 100 and the centre of gravity 1004 with a movable foot 1000 in a first and second position. The movable foot 1000 is configured to provide stability to the backpack 100 by ensuring that the centre of gravity 1004 of the backpack 100 is positioned over a footprint 1006, which is defined by the contact area between the movable foot 1000 and the lower frame portion 110. The footprint 1006 is expandable when the movable foot 1000 engages the ground 1002 along with the lower frame portion 110.

In one example, the backpack 100 may comprise a moveable foot 1000 that is connected to the lumbar support assembly 202 and is operatively coupled to the height adjustment mechanism 300. The moveable foot 1000 is configured to move between an extended position, where it is engageable with the ground 1002 at the same time as the lower frame portion 110, and a retracted position, where it is not in contact with the ground 1002.

When the moveable foot 1000 and the lower frame portion 110 are in contact with the ground 1002, the footprint 1006 of the backpack 100 is expanded, providing increased stability. This ensures that the backpack 100 remains stable and does not topple over, even when the user is moving or adjusting the backpack 100. The moveable foot 1000 may be designed to project away from the lumbar support assembly 202 in a direction parallel with the backpack longitudinal axis 118 when in the extended position.

In some examples, when the moveable foot 1000 and the lower frame portion 110 are in contact with the ground 1002, the hip belt 128 is raised above the ground 1002 and not in contact with the ground 1002. This feature prevents the hip belt 128 from getting dirty or damaged from contact with the ground 1002 and provides additional comfort and convenience for the user.

The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms “comprises,” “comprising,” “includes,” and/or “including” when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

Relative terms such as “below” or “above” or “upper” or “lower” or “horizontal” or “vertical” may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealised or overly formal sense unless expressly so defined herein.

It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.