Handlebar assembly

Abstract

A handlebar assembly comprises: drop bars; and transversely extendable and retractable flat bars. The drop bars can be used when a cyclist using the handlebar assembly wishes to cycle aerodynamically at high speeds. The flat bars can be extended when the cyclist wishes to have more control over the bicycle to which the handlebar assembly is attached, for example in more technical gravel / mountain biking terrain. The flat bars can then be retracted when they are no longer required.

Description

[0001] HANDLEBAR ASSEMBLY

[0002] Field of the invention

[0003] The present invention relates to a handlebar assembly, a bicycle comprising the handlebar assembly and a method of using the handlebar assembly.

[0004] Background to the invention

[0005] It is known to use different types of handlebars for different types of cycling. The different types of cycling are typically defined by terrain / ground type and activity. For road cycling and cycling races, cyclists often use drop handlebars (which typically drop down and curve initially away from and then towards the rider at the ends), which are suitable for cycling in aerodynamic form to increase speed. For mountain biking, cyclists often use flat or riser handlebars which extend transversely, i.e. crosswise relative to the direction of travel. The flat or riser handlebars can be used in cycling where the cyclist wants to have wide handlebars to improve control over the bicycle, particularly on rough terrain. The term “gravel biking” is relatively recent terminology, and refers to cycling which can combine elements of both types of cycling mentioned above. Typically, a gravel bike may be designed to be used on a range of terrains, and may be best suited to tracks or other types of terrain (such as gravel tracks or similar rough trails) which are not metalled roads (a “metalled road” is also known as a “paved road” or “sealed road” in some countries) but which are also not extremely technically challenging. Summary of the invention

[0006] From a first aspect the present invention provides a handlebar assembly comprising drop bars and transversely extendable and retractable flat bars.

[0007] Advantageously, the drop bars can be used when a cyclist using the handlebar assembly wishes to cycle aerodynamically at high speeds. The flat bars can be extended when the cyclist wishes to have more control over the bicycle to which the handlebar assembly is attached, for example in more technical gravel / mountain biking terrain. The flat bars can then be retracted when they are no longer required. The extension and retraction of the flat bars can be performed when the cyclist is cycling (i.e. without stopping).

[0008] The handlebar assembly can be retroactively fitted to existing bicycles.

[0009] The drop bars and the transversely extendable and retractable flat bars are fully operational meaning that each type of handlebar can be used as they would be if only one type of handlebar was present.

[0010] It may be that the drop bars and the transversely extendable and retractable flat bars each have respective brake and gear controls associated with each type of handlebar.

[0011] The drop bars are intended to be gripped by the cyclist’s right and left hands (at right and left sides of the drop bars, respectively). Typically, the drop bars are gripped when the flat bars are retracted. The drop bars are often symmetrical, such that the left side of the drop bars mirrors the right side of the drop bars, at least in the areas where the drop bars are intended to be gripped.

[0012] The drop bars may comprise several sections. One of the sections may be a crosspiece which extends in a generally transverse direction relative to the direction of travel. The design of many conventional drop bar crosspiece sections (which are commonly substantially straight tubular bars) permits the hands to rest on the top of the right-hand side and the top of the left-hand side of the crosspiece (this hand position may be referred to as the “tops”) though the hands typically spend more time in other positions. The crosspiece of the present invention may optionally be designed to permit this hand position.

[0013] The left and right side of the crosspiece may extend into side sections each of which extend away from the cyclist (i.e. longitudinally, in the direction of travel), may bend downwardly, may curve back towards the cyclist to form a hook portion, and may further extend, optionally in a horizontal, or substantially horizontal, longitudinal direction, further back towards the cyclist, to comprise a drop portion which is the end of the drop bars. The drop portion of the drop bars is at a lower height than the crosspiece of the drop bars.

[0014] In one example, the hooks may extend in the vertical direction, in use, which is towards the ground. Typically, the hooks comprise a curved profile, which may comprise a ‘C’ shape. The drops may extend in a (e.g. substantially) backward direction, towards from the cyclist in use.

[0015] It may be that the drop bars are flared. Flared drop bars have hooks (and possibly drops) which are angled outwards, away from the crosspiece.

[0016] It may be that the drop bars enable several different hand positions. In addition to the “tops” hand position, the bars may optionally be shaped be held at any or all of the following positions: the “hooks” (i.e. with the hands pushed into the throat of the hooks or the inside of the bends of the hooks); or the ’’drops” (i.e. at or towards the bottom of the bars). Additionally, as discussed further below, braking controls may be, and commonly are, present on drop bars, often in or near to the top of the hooks: this enables a further position termed the “hoods” in which the hands are on top of the brake hoods or holding onto sections which attach the braking mechanisms to the drop bars.

[0017] It will be appreciated that there are numerous possibilities for drop bar shapes and geometries. The vertical distance (sometimes referred to as the “drop”) between the crosspiece and the drops may vary. The horizontal distance (sometimes referred to as the “reach”) between the crosspiece and the hooks may vary. The extent, tightness and location of curvatures may vary, as may the presence of any straight or angular sections. The flare, if any, may vary. Nevertheless, what all drop bars have in common is that they allow a hand position below the height of the crosspiece. Conventionally, drop bars are typically relatively narrow compared to the width of flat or riser bars, and this applies to the drop bars of the present invention. This brings a number of advantages, including good aerodynamics, an effective racing position, and an ability to manoeuvre in small gaps or within groups of other riders. Where the drop bars do not flare outwards, the width of the drop bars may equate to the width of the crosspiece.

[0018] It may be that the drop bars have a width between 36cm and 44cm. It may be that the drop bars have a width of 36cm, 38cm, 40cm, 42cm or 44cm. It may be that the diameter of the hooks of the drop bars is between 22mm and 24mm.

[0019] The flat bars are intended to be gripped by the cyclist when they are extended, but typically not when they are retracted. The flat bars comprise a left flat bar and a right flat bar, intended to be gripped by the cyclist’s left and right hands respectively. The flat bars are adjustable to vary the width of the handlebar assembly by extending and retracting the flat bars. The flat bars may be straight bars or rods.

[0020] It may be that the handlebar assembly, when the flat bars are extended, has a width between 60cm and 80cm. It may be that the drop bars have a width of 60cm, 65cm, 70cm, 75cm or 80cm. It may be that the diameter of the flat bars is between 20mm and 24mm.

[0021] It may be that the diameter of the handlebar assembly is greater in a central portion than at the end portions. In other words, the diameter of the handlebar assembly may be narrower in regions which are intended to be gripped by the cyclist in use.

[0022] It may be that the handlebar assembly is configured such that there is only one “extended” position, in other words that when the flat bars are deployed they assume one position of fixed width. Similarly it may be that the handlebar assembly is configured such that there is only one “retracted” position, in other words that when the flat bars are retracted they assume one position in which they are not intended to be gripped (or are not able to be gripped, e.g. are not accessible to be gripped).

[0023] Nevertheless, it is possible, in accordance with the present invention, for the handlebar assembly to be configured such that there is more than one extended position such that more than one width is possible when the flat bars are deployed. Two or more discrete positions are possible. It is also possible that the apparatus could be configured to allow continuous variation of width.

[0024] The term “flat bars” herein refer to bars which are generally flat and generally transverse at the hand gripping portions, regardless of the height, geometry or shape elsewhere. This therefore can include bars in which the hand gripping portions are higher than or otherwise offset from the location where the handlebar assembly is attached to the bicycle (e.g. via the stem or steering post). Therefore, the term “flat bars” herein includes “riser bars”. Riser bars are a type of flat bars in which the hand gripping portions are higher, e.g. slightly higher, e.g. up to about 100 mm higher, e.g. up to about 50mm higher, e.g. about 15 to 50 mm higher than the bicycle stem or other central attachment or clamp point.

[0025] The terms “generally flat” and “generally transverse” in relation to the hand gripping portions of the “flat bars” denote that they are approximately flat and approximately transverse but not necessarily exactly flat nor exactly transverse. The hand gripping portions may be slightly angled so that rather than being exactly flat (horizontal) they may be at an angle (e.g. upwards) of (e.g. may have an up sweep of) up to 15 degrees, for example up to 10 degrees, for example between 2 and 8 degrees, for example between 3 and 7 degrees, for example between 4 and 6 degrees, for example about 5 degrees from the horizontal. Alternatively or additionally the hand gripping portions may be slightly angled so that rather than being exactly transverse (perpendicular to the direction of travel) they may be at an angle (e.g. backwards) of (e.g. may have a back sweep of) up to 20 degrees, for example up to 15 degrees, for example up to 10 degrees, for example between 5 and 10 degrees, for example between 7 and 10 degrees, for example between 7 and 9 degrees, for example about 8 degrees from the horizontal.

[0026] It should be noted that, whereas conventional flat bars are generally formed from a single bar or tube, this is not necessarily the case with the flat bars of the present invention. The handlebar apparatus of the present invention comprises fixed drop bars as well as extendable and retractable flat bars. The handlebar apparatus only needs one attachment point to the bicycle, and that attachment point can be on the crosspiece of the drop handlebars, which means that the flat bar components do not need to be attached directly to the bicycle but can be affixed to the crosspiece. The flat bars of the present invention need to be extendable and retractable on both sides, and this can be achieved by attaching separate left and right flat bar components. Attaching separate left and right flat bar components to the crosspiece is convenient and utilises the strength, rigidity and convenient geometry of the crosspiece.

[0027] It may be that the extension and / or retraction of the extendable and retractable flat bars is coupled.

[0028] It may be that the left and right flat bars are coupled such that they retract and extend simultaneously. It may be that extension and retraction of the extendable and retractable flat bars is dependent on one another. Retraction of the left flat bar may cause corresponding retraction of the right flat bar, and vice versa. Similarly, extension of the left flat bar may cause corresponding extension of the right flat bar, and vice versa. Alternatively, it may be that the left and right flat bars are each independently extendable and retractable.

[0029] The handlebar assembly is used to steer the bicycle to which the handlebar assembly is attached. The handlebar assembly may include other components, such as braking controls, gear controls, bicycle seat controls, light controls and / or a bell. Some components may be positioned on the crosspiece, the drop bars or the flat bars. In some examples, there will be multiple controls for the same purpose on the handlebar assembly.

[0030] The width of the handlebar assembly in the transverse direction is greater when the extendable and retractable flat bars are extended than when the extendable and retractable flat bars are retracted.

[0031] Advantageously, the width of the handlebar assembly is adjustable, to enable to a cyclist to change the width of the handlebar assembly, when required. The width of the handlebar assembly is quickly changed by extending or retracting the flat bars. The cyclist may adjust the width of the handlebar assembly during cycling and without stopping. Alternatively, the width of the handlebar assembly may be adjusted by the cyclist when the cyclist has stopped cycling, if so desired. This is particularly advantageous for gravel biking or competitive cycling, where it may be desired to conveniently switch from handlebars suitable for achieving higher speeds (e.g. drop bars) to handlebars suitable for increased control over the bicycle (e.g. flat bars). The width of the handlebar assembly refers to the transverse direction from the left to the right side (or right to left) of the handlebar assembly. The width of the handlebar assembly is perpendicular to the forward direction of travel. Typically, the width of the central portion corresponds to the approximately the width of a cyclist’s shoulders.

[0032] It may be that the drop bars comprise a crosspiece and the extendable and retractable flat bars extend from the crosspiece.

[0033] It may be that the left flat bar extends outwards from the left side of the crosspiece and away from the crosspiece (i.e. in the left direction). Similarly, it may be the that right flat bar extends outwards from the right side of the crosspiece and away from the crosspiece (i.e. in the right direction).

[0034] Optionally, the crosspiece may be at least partially hollow or tubular to house various other components of the handlebar assembly, as will be discussed below.

[0035] As mentioned above, the crosspiece may be considered a component of the drop bars. Typically, crosspiece is a structure or frame, and it (or part of it) may be in the shape of a rod or bar. The crosspiece (or part of it) may have a circular or oval cross-section. It may be that the cross-section of the crosspiece varies with width. However, other shapes of the central portion will be envisaged.

[0036] It may be that the extendable and retractable flat bars extend linearly from the crosspiece.

[0037] It may be that the extendable and retractable flat bars are linearly extended (and retracted) in that the extension of the width of the handlebar assembly is caused by extension (and retraction) of the left and right flat bars in a straight line (i.e. in the left and right directions, respectively). The extension and retraction of the flat bars may be telescopic, e.g. from within the housing of the crosspiece. The extension and retraction may be in linear directions which are within the angular limits specified above for the hand gripping portions of the “flat bars”, relative to the horizontal and relative to the transverse. By comparison, it will be appreciated that rotation about a pivot is different to linear extension, even if the width of the handlebar assembly is increased through rotation about a pivot. It may be that the flat bars are also rotated when they are extended and retracted. For example, the flat bars may also be rotated towards or away from the ground or towards or away from the cyclist.

[0038] It may be that the extendable and retractable flat bars are housed in the crosspiece when retracted. It may be that the extendable and retractable flat bars are at least partially housed in the crosspiece when retracted.

[0039] It may be that the crosspiece has a left cavity and a right cavity. The left flat bar may be housed in (or retracted within) the left cavity when the left flat bar is retracted. The right flat bar may be housed in (or retracted within) the right cavity when the right flat bar is retracted.

[0040] In the example where the flat bars are linearly extendable and are housed in the crosspiece, the linear extension may be a telescopic extension. In this way, the flat bars may slide out of the crosspiece when extended and slide into the crosspiece when retracted.

[0041] It may be that the handlebar assembly comprises one or more first braking controls positioned on the drop bars.

[0042] The one or more first braking controls are typically positioned near the top of the hooks of the drop bars. As previously discussed, the one or more first braking controls typically form “hoods” when attached to the drop bars. Each first braking control may optionally comprise a brake lever and a brake housing, the brake housing also attaching the braking control to the bar. The brake housing may be covered with a brake hood. The brake hood also provides a further place for the cyclist to grip when cycling.

[0043] It may be that a front first braking control to control the front wheel of the bicycle is positioned on one side of the drop bars and a rear first braking control to control the rear wheel of the bicycle is positioned on the other side of the drop bars. Advantageously, the first braking controls are within easy reach of the cyclist’s hands when the cyclist is gripping the drop bars, so the cyclist is able to quickly apply the brakes as required.

[0044] It may be that the position of the one or more first braking controls with respect to the drop bars is fixed and not adjustable. The position of the one or more first braking controls is independent of the position of the flat bars. Therefore, it may be that the one or more first braking controls are always accessible to the cyclist.

[0045] Advantageously, the cyclist is able to quickly access braking controls even when the flat bars are retracted, which is important for safety when cycling.

[0046] It may be that the handlebar assembly comprises one or more second braking controls positioned on the transversely extendable and retractable flat bars.

[0047] The one or more second braking controls are typically connected to the flat bars with an attachment such as clamps, clips or screws. The position of the one or more second braking controls relative to the flat bar to which it is attached may be adjustable. However, the one or more first braking controls are typically positioned near the ends of the flat bars to reduce the reach required between the cyclist’s hands when gripping the ends of the flat bars and the second braking controls.

[0048] It may be that a front second braking control to control the front wheel of the bicycle is positioned on the flat bar on one side and a rear second braking control to control the rear wheel of the bicycle is positioned on the flat bar on the other side. Advantageously, the second braking controls are within easy reach of the cyclist’s hands when the cyclist is gripping the flats bars, when extended, so the cyclist is able to quickly apply the brakes as required.

[0049] It may be that the second braking control is coupled to the flat bar to which it is positioned on (e.g. connected to or attached to). It may be that the position of the one or more second braking controls in space is dependent on the position of the flat bars. That is, retraction or extension of the flat bars may cause corresponding movement of the respective second braking control. Advantageously, the cyclist is able to quickly access braking controls even when the flat bars are extended, which is important for safety when cycling. It may be that the one or more second braking controls are only accessible to the cyclist when the flat bars are extended. In the example where the extendable and retractable flat bars are housed within the crosspiece when retracted, when the left flat bar is extended, the second braking control is typically also extended from within the crosspiece, and likewise for the right flat bar. Similarly, when the left flat bar is retracted, the second braking control is typically also retracted into the crosspiece, and likewise for the right flat bar.

[0050] Advantageously, the cyclist is able to access two different braking controls when the flat bars are extended, which is important for safety when cycling. If the cyclist were provided with braking controls on only either the drop bars or the flat bars, then the cyclist would not be able to quickly brake when gripping the bars to which the brake controls are not attached. As a result, the use of brakes of both the drop and flat bars enables quick braking regardless of which bar is being gripped.

[0051] Typically, the one or more first and second braking controls may comprise a lever. However, other braking controls, which require user input and operate on demand, will be envisaged.

[0052] It may be that the one or more first braking controls and / or the one or more second braking controls are mechanical, e.g. use cables.

[0053] It may be that the one or more first braking controls and / or the one or more second braking controls are hydraulic.

[0054] It may be that the one or more first braking controls and / or the one or more second braking controls are electronic.

[0055] The first and / or second braking controls may wirelessly communicate with the brakes on the front and rear wheels of the bicycle to which the handlebar assembly is attached.

[0056] It may be that the handlebar assembly comprises one or more first gear controls positioned on the drop bars.

[0057] The one or more first gear controls are configured to control the gear of the bicycle to which the handlebar assembly is attached. The one or more first gear controls are typically positioned near the top of the hooks of the drop bars. Typically, where the drop bars comprise both braking controls and gear controls, the one or more first gear controls are connected to the drop bars near the brake hoods. Advantageously, the cyclist is able to control the gears and brakes without removing their hand completely from the drop bars. It may be that a gear control may be adjacent to a braking control: the two may form part of the same unit, for example there may be a brake lever and a gear lever connected to the same housing.

[0058] Typically, the handlebar assembly comprises a first gear control on the left side of the drop bars and a further first gear control positioned on the right side of the drop bars. It may be that the first gear control or further first gear control controls a front derailleur. It may be that the other gear control controls a rear derailleur. Advantageously, the first gear controls are within easy reach of the cyclist’s hands when the cyclist is gripping the drop bars, so the cyclist is able to quickly change gears as required.

[0059] It may be that the position of the one or more first gear controls with respect to the drop bars are fixed and not adjustable. It may be that the position of the one or more first gear controls are independent of the position of the flat bars. It may be that the one or more first gear controls are always accessible to the cyclist. Advantageously, the cyclist is able to quickly access gear controls even when the flat bars are retracted, which is important for control of the bicycle when cycling.

[0060] It may be that the handlebar assembly comprises one or more second gear controls positioned on the extendable and retractable flat bars.

[0061] The one or more second gear controls are configured to control the gear of the bicycle to which the handlebar assembly is attached. The position of the one or more second gear controls relative to the flat bar to which it is attached may be adjustable. However, the one or more second gear controls are typically positioned within reach of the cyclist’s hands (e.g. typically the cyclist’s thumb), when gripping the flat bars. It may be that the one or more second gear controls are positioned between the end of the flat bars and the crosspiece.

[0062] Typically, the handlebar assembly comprises a second gear control on the left flat bar and a further second gear control positioned on the right flat bar. It may be that the second gear control or the further second gear control controls a front derailleur. It may be that the other second gear control controls a rear derailleur. Advantageously, the second gear controls are within easy reach of the cyclist’s hands when the cyclist is gripping the flat bars, so the cyclist is able to quickly change gears as required.

[0063] It may be that the one or more second gear controls are coupled to the flat bar to which it is positioned on (e.g. connected to or attached to). It may be that the position of the one or more second gear controls in space are dependent on the position of the flat bars in space. That is, retraction or extension of the flat bars may cause corresponding movement of the respective second gear control. Advantageously, the cyclist is able to quickly access gear controls even when the flat bars are extended, which is important for safety when cycling.

[0064] It may be that the one or more second gear controls are only accessible to the cyclist when the flat bars are extended. In the example where the extendable and retractable flat bars are housed within the crosspiece when they are retracted, when the right flat bar is extended, the second braking control is typically also extended from within the crosspiece, and likewise for the left flat bar (if there is also a gear control connected to the left flat bar). Similarly, when the right flat bar is retracted, the second gear control is typically also retracted into the crosspiece, and likewise for the left flat bar (if there is also a gear control connected to the left flat bar).

[0065] Advantageously, the cyclist is able to access two different gear controls when the flat bars are extended, which is important for safety when cycling. If the cyclist were provided with gear controls on only either the drop bars or the flat bars, then the cyclist would not be able to quickly change gear when gripping the bars to which the gear controls are not attached. As a result, the use of gears of both the drop and flat bars enables quick gear changes regardless of which bar is being gripped.

[0066] Typically, the one or more first and second gear controls may comprise one or more buttons, a dial, one or more levers or a switch. However, other gear controls, which require user input and operate on demand, will be envisaged.

[0067] It may be that the one or more first gear controls and / or the one or more second gear controls are mechanical, e.g. use cables. It may be that the one or more first gear controls and / or the one or more second gear controls are hydraulic.

[0068] It may be that the one or more first gear controls and / or the one or more second gear controls are electronic.

[0069] The first and / or second gear controls may wirelessly communicate with the gears on the bicycle to which the handlebar assembly is attached.

[0070] It may be that the handlebar assembly comprises an attachment member for attaching the handlebar assembly to a bicycle.

[0071] The handlebar assembly is attached to a bicycle via the attachment member. Typically, the attachment member is formed on the drop bars, e.g. the crosspiece. The attachment member may couple with a corresponding portion of a bicycle to attach the handlebar assembly to the bicycle. The attachment member may be configured to attach the handlebar apparatus to a bicycle stem or a bicycle head tube. The attachment member may comprise at least one of: a recess on the drop bars, a hole (e.g. threaded) in the drop bars, a rail on the drop bars, a clamp mechanism and a screw.

[0072] Typically, the attachment member allows the handlebar assembly to be removable from the bicycle to which it is attached. Advantageously, this means the handlebar assembly is easily removable for cleaning, maintenance, and repairs. The handlebar assembly can be swapped to another bicycle, as required by the cyclist, with ease.

[0073] It may be that the handlebar assembly comprises an extension and retraction mechanism to extend and retract the extendable and retractable flat bars.

[0074] Typically, the extension and retraction mechanism comprises one or more components configured to adjust the position of the flat bars by way of extension and retraction. It may be that the extension and retraction mechanism comprises an actuator coupled to each flat bar. It may be that the extension and retraction mechanism comprises a latching mechanism to lock each respective flat bar into a retracted position (e.g. within the crosspiece). It may be that the handlebar assembly comprises a controller and the extension and retraction mechanism is electronically controlled. It may be that the flat bars are extended and retracted in dependence on an electronic control signal.

[0075] It may be that the extension and retraction mechanism comprises one or more resiliently deformable members.

[0076] It may be that the one or more resiliently deformable members are compressed when the flat bars are retracted. It may be that the one or more resiliently deformable members are relaxed (or expanded) when the flat bars are extended.

[0077] It may be the one or more resiliently deformable members comprise a left resiliently deformable member to extend and retract the left flat bar. It may be the one or more resiliently deformable members comprise a right resiliently deformable member to extend and retract the right flat bar.

[0078] It may be that the one or more resiliently deformable members comprise one or more springs.

[0079] It may be that the one or more resiliently deformable members comprise one or more air springs.

[0080] Typically, the one or more air springs are relaxed (or expanded) when the flat bars are extended. Typically, the one or more air springs are compressed when the flat bars are retracted. Advantageously, the air springs are lightweight, which is a desirable for bicycle manufacturing materials.

[0081] It may be that the extendable and retractable flat bars are extendable in dependence on a first user input.

[0082] It may be that the flat bars are extended in dependence on the same first user input. Alternatively, it may be that each flat bar is extended in dependence on a separate first user input. Typically, the first user input is a physical input to thereby cause the left and / or right flat bar to extend. The first user input causes actuation of the respective flat bar(s) to extend the respective flat bar. Advantageously, the cyclist is able to extend the flat bars during cycling and as required (potentially without stopping).

[0083] It may be that the handlebar assembly comprises a first user input device to receive the first user input. Typically, the first user input device comprises at least one of: a button and a lever.

[0084] It may be that the handlebar assembly comprises a single first user input device for the first user input to extend both flat bars. Alternatively, in the example where each flat bar is extended in dependence on a separate first user input, it may be that the handlebar assembly comprises a first user input device for each flat bar. It may be that the first user input device(s) is positioned within reach of a cyclist’s hand when gripping the drop bars.

[0085] It may be that the extendable and retractable flat bars are retractable in dependence on a second user input.

[0086] It may be that the flat bars are retracted in dependence on the same second user input. Alternatively, it may be that each flat bar is retracted in dependence on a separate second user input. Typically, the second user input is a physical input to thereby cause the left and / or right flat bar to retract. Typically, the second user input causes actuation of the respective flat bar to retract the respective flat bar.

[0087] Advantageously, the cyclist is able to retract the flat bars during cycling and as required (potentially without stopping).

[0088] It may be that the second user input comprises exertion of a force by a user on the extendable and retractable flat bars and / or wherein the handlebar assembly comprises a second user input device to receive the second user input. It may be that the second user input device comprises at least one of: a button and a lever.

[0089] It may be that the flat bars are retracted in dependence on the cyclist exerting a force on the flat bars. That is, the cyclist may push the flat bars towards one another to retract the flat bars. If the flat bars are coupled, the cyclist may only need to push one of the flat bars in order to retract both flat bars. It may be that the exertion of the force by the cyclist (i.e user) is to push the extended flat bars into the respective cavities in the crosspiece.

[0090] It may be that the handlebar assembly comprises a single second user input device for the second user input to retract both flat bars. Alternatively, in the example where each flat bar is retracted in dependence on a separate second user input, it may be that the handlebar assembly comprises a second user input device for each second user input. It may be the that the second user input device(s) is positioned within reach of a cyclist’s hand when gripping the left flat bar and / or the right flat bar.

[0091] In some examples, the first and second user input devices may the same.

[0092] Other forms of user input devices will be envisaged.

[0093] It may be that the drop bars are gravel or road or racing handlebars.

[0094] Typically, the first and second drop gripping portions may have a profile corresponding to gravel or road or racing handlebars.

[0095] It may be that the extendable and retractable flat bars are mountain bike handlebars.

[0096] According to an aspect of the present invention, there is provided a bicycle comprising a handlebar assembly as discussed above.

[0097] The handlebar assembly may be used on a gravel bike, a road bike or a mountain bike. It will be appreciated that this list is not exhaustive and other types of bicycle for which this handlebar assembly is suitable for use will be envisaged.

[0098] According to an aspect of the present invention, there is provided a method of using a handlebar assembly as discussed above comprising extending or retracting the extendable and retractable flat bars.

[0099] It may be that the method is performed by a cyclist on a bicycle with the handlebar assembly attached, during cycling, to extend the width of the handlebar assembly for increased control. It may be that the method comprises inputting the first user input. It may be that the method is performed by a cyclist on a bicycle with the handlebar assembly attached, during cycling, to reduce the width of the handlebar assembly for increased speed. It may be that the method comprises inputting the second user input.

[0100] It may be that at least one of the drop bars and the flat bars are formed of at least one of: metal (e.g. aluminium or titanium), metal alloy (e.g. steel) and carbon fibre.

[0101] It may be that at least one of: the drop bars and the flat bars comprise gripping material. It may be that the gripping material is in the form of a tape or wrap around the supporting structure of the drop bars and / or flat bars. It may be that the gripping material is moulded around the supporting structure of the drop bars and / or flat bars. The gripping material may be removable from the supporting structure. It may be that the gripping material comprises at least one of: leather, rubber, padding, polyurethane and foam. This list is not exhaustive, and the skilled person will envisage other suitable gripping materials which provide comfort and support for the cyclist when holding the drop or flat bars.

[0102] It may be that the crosspiece comprises a left end and a right end. The left end may be capped by a left end cap and the right end may be capped by a right end cap. It may be that the left end cap encloses the left cavity of the crosspiece when the left flat bar is retracted. It may be that the right end cap encloses the right cavity of the crosspiece when the right flat bar is retracted.lt may be that the left and right end caps are coupled to the respective left and right flat bars. As such, when the right flat bar is extended, the right end cap may move outwards, away from the crosspiece and likewise for the left flat bar.

[0103] Description of the Drawings

[0104] Example embodiments of the present invention will now be illustrated with reference to the following Figures in which:

[0105] Figure 1 illustrates a perspective view of an apparatus according to an embodiment of the present invention;

[0106] Figure 2 illustrates another perspective view of an apparatus according to an embodiment of the present invention; Figure 3 illustrates a bicycle comprising an apparatus according to an embodiment of the present invention;

[0107] Figure 4 illustrates a cross section of an apparatus according to an embodiment of the present invention; and

[0108] Figure 5 illustrates a flow chart of a method according to an embodiment of the invention.

[0109] Detailed Description of an Example Embodiment

[0110] Figure 1 illustrates a handlebar assembly 100 according to an aspect of the present invention. Figure 1 shows the handlebar assembly 100 in a configuration in which the flat bars are retracted. The handlebar assembly 100 comprises a crosspiece 110. The crosspiece 110 has cavities (not shown) to allow components to be housed within the crosspiece. The crosspiece 110 comprises an attachment member 115 for attaching the handlebar assembly 100 to a bicycle. The attachment member 115 is a rail around which a clamp can be used to attach the handlebar assembly 100 to the bicycle.

[0111] The crosspiece 110 extends from a right end 111 to a left end 112. The right end 111 is capped by a right end cap 113. The left end 112 is capped by a left end cap 114. The right end cap 113 has a right button 180a, functioning as the first user input device, which can be pressed by the cyclist to cause extension of a right flat bar which is shown in Figure 2. When the cyclist is riding the bicycle with the flat bars retracted, the cyclist grips the drop bars 120a, 120b. The first button 180a is easily accessible and within reach of the cyclist’s hand on the right drop bar 120a. The cyclist can press the button 180a to extend the right flat bar when it is desired to have more control over the bicycle (e.g. when cycling over rough terrain). When the cyclist wants to retract the right flat bar, the cyclist can push the right flat bar inside the crosspiece 110. The cyclist can retract the right flat bar when it is desired to just use the drop bars 120a, 120b, e.g. to achieve an aerodynamic position.

[0112] Although not shown in Figure 1 , it will be appreciated that a left flat bar is housed within the crosspiece 110 and can be extended as required. The left end cap 114 comprises a second button (not shown), also functioning as the first user input device, to control extension of the left flat bar and the rear second braking control (which are not shown).

[0113] A right drop bar 120a extends from the right end 111 in a curved ‘c’ shape. A left drop bar 120b extends from the left end 112 in a curved ‘c’ shape. The right drop bar 120a has a first right braking control 160a to control braking of the front wheel. The left drop bar 120b has a first left braking control 160b to control braking of the rear wheel. The right drop bar 120a has a first right gear control 190a to control one of the derailleurs. The left drop bar 120b has a first left gear control 190b to control the other derailleur.

[0114] Figure 2 illustrates a handlebar assembly 100 according to an aspect of the present invention. Figure 1 shows the handlebar assembly 100 in a configuration in which the flat bars are extended. The handlebar assembly 100 comprises a right flat bar 130a and a left flat bar 130b.

[0115] The right end cap 113 is spaced apart from the right end 111 of the crosspiece 110. When the right flat bar 130 is extended, it is accessible (e.g. able to be gripped) by the cyclist. That is, the right flat bar 130 can be gripped because it is not housed in the crosspiece 110. The left end cap 114 is spaced apart from the left end 112 of the crosspiece 110. When the left flat bar 130 is extended, it is accessible (e.g. able to be gripped) by the cyclist. That is, the left flat bar 130 can be gripped because it is not housed in the crosspiece 110.

[0116] A second right braking control 165a is positioned on the right flat bar 130a. Therefore, when the right end cap 113 is spaced apart from the crosspiece 110, the second right braking control 165a is also accessible by the cyclist. The second right braking control 165a controls braking of the front wheel of the bicycle to which the handlebar assembly 100 is attached. A second left braking control 165b is positioned on the left flat bar 130b. Therefore, when the left end cap 114 is spaced apart from the crosspiece 110, the second left braking control 165b is also accessible by the cyclist. The second left braking control 165b controls braking of the rear wheel of the bicycle to which the handlebar assembly 100 is attached.

[0117] The right flat bar 130a also has a second right gear control 195a to control one of the derailleurs. The left flat bar 130b has a second left gear control 195b to control the other derailleur. When the flat bars 130a, 130b are extended (Figure 2), the width of the handlebar assembly 100 (from one end cap to the other) is greater than the width of the handlebar assembly 100 (from one end cap to the other) when the flat bars 130a, 130b are retracted (Figure 1).

[0118] Figure 3 illustrates an apparatus according to an aspect of the present invention. In particular, Figure 3 illustrates a bicycle 300 comprising the handlebar assembly 100. The bicycle 300 comprises a stem 305 for attachment to the handlebar assembly 100..

[0119] The handlebar assembly 100 is attached to the bicycle 300 via the attachment member 115 on the crosspiece 110 being attached to a stem 305 of the bicycle 300. However, it could be that the handlebar assembly includes a stem, and the handlebar assembly is attached to the bicycle via the stem (of the handlebar assembly) being attached to a head tube of the bicycle.

[0120] Figure 4 illustrates a cross section of an apparatus according to an aspect of the present invention. The drop bars 120a, 120b are not shown in Figure 4 for simplicity. Figure 4 illustrates the crosspiece 110 which extends from the right end 111 to the left end 112. The right flat bar 130a, the second right braking control 165a, the second right gear control 195a and the first end cap 113 are shown extended from the crosspiece 110. The left flat bar 130a, the second left second braking control 165a, the second left gear control 195b and the second end cap 114 are shown retracted within the crosspiece 110.

[0121] Figure 4 illustrates an example of a retraction mechanism for extending and retracting the flat bars 130a, 130b. The extension and retraction mechanism comprises a right air spring 171a and a left air spring 171 b. The right air spring 171a actuates and is coupled to the right flat bar 130a. The left air spring 171 b actuates and is coupled to the left flat bar 130b. The right and left air springs 171a, 171b are separated by the stopping member 173 which prevents movement of the air springs towards one another.

[0122] In relation to the left flat bar 130b, which is shown retracted, the left air spring 171 b is compressed. The left flat bar 130b is held in the retracted position by way of first and second latching members 172a, 172b. The first latching member 172a is a hinged bar which is connected to the inside of the crosspiece 110 and is rotatable about a pivot. The second latching member 172b is a rigid bar. The first latching member 172a is only rotatable in the clockwise direction in response to the button 180a being pressed. The first latching member 172a prevents movement of the second latching member 172b out of the crosspiece 110. When the cyclist actuates the second button 180b, the first latching member 172a is caused to rotate clockwise to fold up clockwise against the inside of the crosspiece 110. The left air spring 171 b expands and pushes the left flat bar 130b out of the crosspiece 110 to extend the left flat bar 130b.

[0123] In relation to the right flat bar 130a, which is shown in the extended position, the right air spring 171a is compressed. The right flat bar 130a is held in the extended position by pressure from the right air spring 171a. When the cyclist wishes to retract the right flat bar 130a, the cyclist pushes the right flat bar 130a into the crosspiece 110. This causes the right air spring 171a to compress.

[0124] The handlebar assembly 100 comprises third and fourth latching members 172c, 172d. The third latching member 172c is a hinged bar which is connected to the inside of the housing and is rotatable about a pivot. The fourth latching member 172d is a rigid bar. The third latching member 172c is only rotatable in the anticlockwise direction in response to the button 180b being pressed. The third latching member 172c is rotatable in the clockwise direction in response to the user pushing the right flat bar 130a into the crosspiece 110. When the right flat bar 130a is pushed towards the crosspiece 110, the fourth latching member 172d pushes the third latching member 172c, thereby causing the third latching member 172c to fold up clockwise against the inside of the crosspiece. The right air spring 171a compresses and the right flat bar 130a is retained in the crosspiece 110 in the retracted position.

[0125] Figure 5 illustrates a flowchart showing method 500 according to an aspect of the present invention. In some examples, the method may comprise only one of the method steps 510 and 520. The method 500 comprises extending 510 the flat bars 130a, 130b. Method step 510 may be performed by a cyclist on a bicycle with the handlebar assembly attached, during cycling, to extend the width of the handlebar assembly for increased control. Method step 510 is performed in response to a user input. The cyclist may press the right button 180a (and a left button on the left end cap that is not shown) to extend each of the corresponding left and right flat bars 130a, 130b. The method 500 comprises retracting 520 the flat bars 130a, 130b. Method step 520 may be performed by a cyclist on a bicycle with the handlebar assembly attached, during cycling, to reduce the width of the handlebar assembly to allow the cyclist to have a more aerodynamic riding position. Method step 520 is performed in response to a user input. The cyclist may press buttons to retract the flat bars 130a, 130b, or push the flat bars 130a, 130b towards one another (i.e. towards the crosspiece 110).

[0126] In summary, there is provided a handlebar assembly (100) comprising drop bars (120a, 120b) and transversely extendable and retractable flat bars (130a, 130b).

[0127] Throughout the description and claims of this specification, the words “comprise” and “contain” and variations of them mean “including but not limited to”, and they are not intended to and do not exclude other components, integers, or steps. Throughout the description and claims of this specification, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.

[0128] Features, integers, characteristics, or groups described in conjunction with a particular aspect, embodiment, or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and / or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and / or steps are mutually exclusive. The invention is not restricted to the details of any foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims

Claims1 . A handlebar assembly comprising: drop bars; and transversely extendable and retractable flat bars.

2. The handlebar assembly of claim 1 , wherein the width of the handlebar assembly in the transverse direction is greater when the extendable and retractable flat bars are extended than when the extendable and retractable flat bars are retracted.

3. The handlebar assembly of any preceding claim, wherein the drop bars comprise a crosspiece and the extendable and retractable flat bars extend from the crosspiece.

4. The handlebar assembly of claim 3, wherein the extendable and retractable flat bars extend linearly from the crosspiece.

5. The handlebar assembly of claim 3 or claim 4, wherein the extendable and retractable flat bars are housed in the crosspiece when retracted.

6. The handlebar assembly of any preceding claim, comprising one or more first braking controls positioned on the drop bars.

7. The handlebar assembly of any preceding claim, comprising one or more second braking controls positioned on the transversely extendable and retractable flat bars.

8. The handlebar assembly of claim 6 or claim 7, wherein the one or more first braking controls and / or the one or more second braking controls are hydraulic.

9. The handlebar assembly of any preceding claim, comprising one or more first gear controls positioned on the drop bars.

10. The handlebar assembly of any preceding claim, comprising one or more second gear controls positioned on the extendable and retractable flat bars.

11. The handlebar assembly of claim 9 or claim 10, wherein the one or more first gear controls and / or the one or more second gear controls are electronic.

12. The handlebar assembly of any preceding claim, comprising an attachment member for attaching the handlebar assembly to a bicycle.

13. The handlebar assembly of any preceding claim, comprising an extension and retraction mechanism to extend and retract the extendable and retractable flat bars.

14. The handlebar assembly of claim 13, wherein the extension and retraction mechanism comprises one or more resiliently deformable members.

15. The handlebar assembly of claim 14, wherein the one or more resiliently deformable members comprise one or more air springs.

16. The handlebar assembly of any preceding claim, wherein the extendable and retractable flat bars are extendable in dependence on a first user input.

17. The handlebar assembly of claim 16, comprising a first user input device to receive the first user input, optionally wherein the first user input device comprises at least one of: a button and a lever.

18. The handlebar assembly of any preceding claim, wherein the extendable and retractable flat bars are retractable in dependence on a second user input.

19. The handlebar assembly of claim 18, wherein the second user input comprises exertion of a force by a user on the extendable and retractable flat bars and / or wherein the handlebar assembly comprises a second user input device to receive the second user input, optionally wherein the second user input device comprises at least one of: a button and a lever.

20. The handlebar assembly of any preceding claim, wherein extension and / or retraction of the extendable and retractable flat bars is coupled.

21. The handlebar assembly of any preceding claim, wherein the drop bars are flared.

22. The handlebar assembly of any preceding claim, wherein the drop bars are gravel or road or racing handlebars.

23. The handlebar assembly of any preceding claim, wherein the extendable and retractable flat bars are mountain bike handlebars.

24. A bicycle comprising a handlebar assembly of any preceding claim.

25. A method of using a handlebar assembly according to any one of claims 1 to 23 comprising extending or retracting the extendable and retractable flat bars.

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