A joint

Abstract

A joint for a portable structure for proving temporary protection for at least one person from environmental conditions, the joint comprising: a body having a first section and a second section configured to be pivotable relative to each other about a pivot axis between a collapsed position and an erected position; a first support pole and a second support pole pivotable relative to the first support pole, wherein the first pole is connected to the first section and the second pole is connected to the second section; and a latching mechanism configured to releasably secure the first section to the second section in the erected position, wherein the latching mechanism comprises: a retention arrangement located on the second section; and the first support pole; and wherein the first support pole is axially moveable relative to the first section between a retracted position and an extended position, and wherein in the extended position the first support pole is configured to extend within the second section of the body to engage with the retention arrangement and achieve latching.

Description

FIELD

[0001] The present teachings relate to a joint for a portable structure for providing temporary protection for at least one person from environmental conditions, and to a portable structure.BACKGROUND

[0002] Portable structures such as tents or umbrellas (known as a "bivvy" or a "brolly") are often used in relation to outdoor sporting activities such as fishing to provide shelter from the weather. Currently available bivvies often include a series of support poles connected to a fabric sheet to support the bivvy in an erect or open position, and the bivvy provides a shelter for a user by virtue of the fabric sheet. The series of support poles are commonly connected at a first end to a mounting block. Each support pole may be connected at a second end to an adjacent support pole such that the support poles are angled, which helps to define the domed shape of the bivvy in the erected open position. The support poles are typically pivotable relative to the adjacent support pole so that the bivvy can be collapsed and stored compactly. In order to maintain the support poles in the erected open position, the support poles can be locked into place. EP0704586 discloses a tent frame and hinge.

[0003] Portable structures for anglers are known and in many situations conflicting constraints exist in terms of portability, easy erection, strength and affordability. Current support poles can be cumbersome and time consuming to erect, thereby increasing complexity of the erection process. This may be particularly problematic when the portable structure is being erected in adverse weather conditions, where the angler may have, for example, limited visibility or limited mobility due cold conditions. In these conditions, the disadvantages associated with complex locking mechanisms with a plurality of parts are exacerbated.

[0004] The present teachings seek to overcome or at least mitigate one or more problems associated with the prior art.SUMMARY

[0005] A first aspect of the teachings provides joint for a portable structure for proving temporary protection for at least one person from environmental conditions, the joint comprising: a body having a first section and a second section configured to be pivotable relative to each other about a pivot axis between a collapsed position and an erected position; a first support pole and a second support pole pivotable relative to the first support pole, wherein the first pole is connected to the first section and the second pole is connected to the second section; and a latching mechanism configured to releasably secure the first section to the second section in the erected position, wherein the latching mechanism comprises: a retention arrangement located on the second section; and the first support pole; wherein the first support pole is axially moveable relative to the first section between a retracted position and an extended position, and wherein in the extended position the first support pole is configured to extend within the second section of the body to engage with the retention arrangement and achieve latching; and wherein the latching mechanism is configured to automatically retract the first support pole when moving from the collapsed to the erected position.

[0006] Advantageously, using the support pole as part of the retention arrangement minimises the number of parts required for the joint and helps to facilitate quicker erection of the portable structure, thereby improving easy of erection and collapse of the portable structure. Further, using the support pole provides a large surface area for the user to grip and actuate the mechanism. In addition the mechanism uses a similar action to traditional end-to end interconnected poles and therefore it is straightforward for experienced users to adapt to using this joint.

[0007] Additionally, the overall joint is robust. The support pole being located within the second section of the body in the erected position helps to reduce exposure to environmental conditions. The support pole forming part of the latching mechanism also helps to ensure the latching mechanism is strong, because the support pole inherently also has the strength to perform the function of supporting the portable structure.

[0008] Optionally, the latching mechanism includes a resilient member configured to bias the first support pole into the extended position, optionally wherein the resilient member is a spring.

[0009] Advantageously, the resilient member exerts a force on the first support pole to bias the first support pole into the extended position, thereby helping to achieve a secure and robust latch engagement.

[0010] The latching mechanism is configured to automatically retract the first support pole when moving from the collapsed to the erected position.

[0011] A guide formation may be provided on the support pole and / or the second section to achieve this.

[0012] Advantageously, automatic retraction of the first support pole helps to improve both ease and speed of erection because the number of steps required to erect the portable structure are reduced, and the user does not need to manually retract the first support pole.

[0013] Optionally, the latching mechanism is configured to automatically extend the first support pole when the first support pole is axially aligned with the retention arrangement during erection.

[0014] Advantageously, automatic extension of the first support pole helps to improve both ease and speed of erection because the number of steps required to erect the portable structure are reduced, and the user does not need to manually extend the first support pole.

[0015] Optionally, the retention arrangement comprises a retention bore located within the second section. The retention bore may be substantially coaxial with the first support pole when the joint is in the erected position.

[0016] Advantageously, the retention bore provides the space into which the first support pole can extend and retract. Additionally, the retention bore reduces the overall weight of the joint.

[0017] Optionally, the retention bore comprises a chamfered edge located towards the first section of the body and / or optionally the first support pole comprises a corresponding chamfered edge located towards the second section of the body. The optionally chamfered edge of the retention bore may be configured to guide the optionally chamfered edge of the support pole into the retention bore when the body is moved between the collapsed position and the erected position.

[0018] Advantageously, guiding of the chamfered edge of the support pole over the chamfered edge of the retention bore helps to facilitate smooth sliding when the body moves between the collapsed and the retracted positions. The chamfered edges may be particularly advantageous when the first support pole is retracted, and the body moves between the collapsed position and the erected position because the corresponding chamfers prevent the second section from obstructing the first support pole when the first section is pivoted.

[0019] Optionally, the first support pole is confined in a first axial direction towards a second free end of the first section

[0020] Optionally the first support pole is confined in a second axial direction towards a first end of the first section located towards the second section

[0021] Optionally the first support pole comprises a confinement feature configured to confine movement of the support pole in the first and / or second axial direction..

[0022] Advantageously, confinement of the first support pole in the first and / or second axial direction helps to confine the first support pole within the first section to prevent the first support pole from retracting / extending out of the first section of the body.

[0023] Optionally, the confinement feature comprises a radial protrusion extending transverse relative to a central longitudinal axis of the first support pole.

[0024] Advantageously, a radial protrusion is simple to manufacture and provides a compact arrangement for locating inside the first section.

[0025] Optionally, the first section comprises a mounting arrangement configured to mount the first support pole to the first section, optionally wherein the first support pole is releasably mounted to the first section, optionally wherein the mounting arrangement comprises a mounting body configured to be mounted to the first section, and wherein the first support pole extends through the mounting body.

[0026] Advantageously the mounting arrangement helps to securely mount the first support pole to the first section to provide a robust joint. The releasable mounting may be useful to disassemble the first section from the first support pole to replace or repair a part.

[0027] Advantageously, providing a mounting body helps to facilitate mounting of the first support pole to the first section without requiring a complex mounting arrangement provided directly on the first support pole.

[0028] Optionally, the mounting arrangement comprises a first mounting formation located on the first section, and a second mounting formation located on the mounting body, and wherein the first mounting formation is configured to engage with the second mounting formation to mount the first support pole to the first section.

[0029] Advantageously, engagement of the first and second mounting formations helps to securely mount the first support pole to the first section.

[0030] Optionally the first mounting formation is configured to receive the second mounting formation in a clip-fit arrangement.

[0031] Optionally, the first and second mounting formations are circumferentially offset from the confinement feature relative to a central longitudinal axis of the first support pole.

[0032] Advantageously, the circumferentially offset helps to prevent the confinement formation from obstructing engagement of the first and second mounting formations.

[0033] Optionally, the second mounting formation is a tooth configured to engage with the first mounting formation

[0034] Optionally the tooth is arranged on a tongue extending from the mounting body in a direction parallel to a central longitudinal axis of the first support pole.

[0035] Advantageously, the tooth engages with the first mounting formation, thereby locking the mounting body relative to the first section. The tongue is simple to manufacture and provides a compact mounting formation as the tongue extends parallel to the first support pole. Additionally, the use of a tongue facilitates quick and simple mounting of the first support pole to the first section, as well as quick and simple disassembly, for example for repair or replacement of a part by being able to flex to allow for engagement and disengagement of the tooth with the first mounting formation.

[0036] Optionally, the first mounting formation is a groove, channel, recess or hole configured to receive the second mounting formation.

[0037] Advantageously, the groove, channel, recess or hole is simple to manufacture. Additionally, the use of a groove, channel, recess or hole facilitates quick and simple mounting of the first support pole to the first section, as well as quick and simple disassembly, for example for repair or replacement of a part.

[0038] Optionally, the mounting body defines a mounting bore for receiving the first support pole therethrough, and the mounting bore comprises an anti-rotation feature configured to interface with a corresponding anti-rotation feature of the first support pole.

[0039] Optionally the anti-rotation feature comprises at least one flat.

[0040] The first section may comprise a first end located towards the second section, and the second section may comprise a first end location towards the first section, and the first end of the first section may abut against the first end of the second section when the body is in the erected position.

[0041] Advantageously, the abutting of the first ends helps to create a cover over the latching mechanism, including the retention arrangement and the first support pole, thereby helping to prevent ingress of moisture and / or dirt from the external environment. This may help to improve lifespan of the joint, as well as facilitating smoother movement between the collapsed and erected positions.

[0042] The joint may comprise an attachment feature configured to attach a component of the portable structure to the joint, for example a sheet.

[0043] Advantageously, the attachment feature helps to facilitate assembly of the portable structure by providing a location to attach, for example, a sheet or another component of the portable structure without requiring a separate body with the attachment location. This helps to provide a more compact arrangement and requires fewer parts.

[0044] The second section may comprise a first end located towards the first section, and the attachment feature may be located at or towards the first end of the second section.

[0045] Advantageously, locating the attachment feature on the second section helps to ensure the attachment of the component of the portable structure to the attachment feature does not cover or obstruct the erection and collapse of the body. Locating the attachment feature towards the first section is particularly advantageous when the component of the portable structure is a sheet, because the location of the attachment feature helps to keep the sheet taught when the portable structure is erected.

[0046] The attachment feature may be a protrusion extending from an exterior surface of the second section of the body, optionally the protrusion may define a loop, or a hook configured to receive the component of the portable structure therethrough.

[0047] Advantageously, a protrusion is simple to manufacture and provides a surface to which components of the portable structure can be attached.

[0048] The first and / or second support pole may be manufactured from a corrosion resistant material Optionally the corrosion resistant material may be an aluminium alloy.

[0049] Advantageously, the corrosion resistant material helps to improve the lifespan of the first and / or second support poles, thereby improving the lifespan of the overall joint.

[0050] The body may be at least partially manufactured from a polymer material, optionally the body may be injection moulded.

[0051] Advantageously, polymer materials such as polyamide are light weight and structurally strong.

[0052] The body may comprise a fibre reinforcement arrangement configured to increase the strength of the body, optionally wherein the fibre reinforcement arrangement comprises glass fibre reinforcement.

[0053] Advantageously, the reinforcement arrangement helps to improve the strength of the joint, thereby reducing the likelihood of the joint failing.

[0054] The first and / or second support pole may define a cross-sectional profile, and wherein the cross-sectional profile defines at least one anti-rotation feature, optionally the anti-rotation feature may comprise at least one flat.

[0055] Advantageously, the anti-rotation features help to prevent the first and / or second support pole from rotating relative to the joint, and therefore relative to the first section. This helps to improve ease of erection of the portable structure, in particular if the poles are curved.

[0056] A further aspect of the teachings provides a portable structure for providing temporary protection for at least one person from environmental conditions, the portable structure comprising: a joint as described above; and a sheet attachable to the joint.

[0057] The sheet may be attachable to the attachment feature of the joint.BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Embodiments will now be described with reference to the accompanying drawings, in which: Figure 1 is an isometric view of a portable structure of the present teachings in an erected position, the portable structure including a joint according to the present teachings; Figure 2 is a back view of the portable structure of Figure 1 in the erected position; Figure 3 is an isometric view of the joint of Figure 1 in an erected and latched position; Figure 4 is an isometric view of the joint of Figure 1 in a collapsed position; Figure 5 is a partially exploded side view of a mounting arrangement of the joint of Figure 1; Figure 6 is a partially exploded isometric view of the mounting arrangement of Figure 5; Figure 7 is a cross-sectional view of the joint of Figure 1 in the collapsed position of Figure 4; Figure 8 is a cross-sectional view of the joint of Figure 1 being moved between the collapsed position of Figure 4 and the erected position of Figure 3; and Figure 9 is a cross-sectional view of the joint of Figure 1 in the erected and latched position of Figure 3. DETAILED DESCRIPTION OF EMBODIMENT(S)

[0059] Referring firstly to Figure 1, a portable structure 10 is illustrated. The portable structure 10 provides a robust shelter under environmental conditions, and additionally may provide sufficient space for a bed. The portable structure 10 is typically stored between uses in a storage bag. Furthermore, it may be necessary to assembly the structure in less than ideal conditions. Therefore, the assembly procedure aims to be relatively straightforward while at the same time, the structure is robust and resilient to extreme weather.

[0060] It shall be appreciated that the term "erected" refers to the portable structure when it has been assembled by the angler and is ready for use, and the term "collapsed" refers to the portable structure when it not in a state for use by the angler.

[0061] The portable structure 10 includes a joint 12, a plurality of support poles 14, 15 a mounting block 16 (e.g. of the type disclosed in the earlier patent GB2474031B or application GB2597483) and a waterproof fabric sheet 18 attached to said support poles 14, 15. It shall be appreciated that for reasons of clarity, only support poles 14, 15 are labelled in Figures 1 and 2. However, it shall be appreciated that each of the joints 12 includes support poles associated therewith and the teachings hereafter are relevant to each of the joints 12. The portable structure 10 is illustrated in the erected position in Figures 1 and 2. In order to store the portable structure 10, the support poles are folded away such they are substantially parallel to each other.

[0062] In the embodiment of Figures 1 and 2, the portable structure 10 has a total of eight second support poles 15 connected at a first end to the mounting block 16. Of the seven second support poles 15, five of the second support poles 15 are pivotably connected to a first support pole 15 at a second end thereof opposing the first end. The first and second support poles 14, 15 are each connected by a joint 12, as illustrated in Figures 1 and 2. There are five joints 12 illustrated in Figure 2, one associated with each of the five sets of first and second support poles 14, 15. It shall be appreciated that in alternative embodiments, any suitable number of first and second support poles 14, 15 may be used to construct the portable structure 10, and therefore any suitable number of joints 12 may be used.

[0063] It shall be appreciated that the joint 12 may be used to connect support poles 14, 15 forming the body of the portable structure 10, or forming alternative sections of the portable structure 10 such as a porch. A first end of each of the first support poles 14 is connected to the joint 12. A second end of each of the first support poles 14 may engage with a ground surface in the erected position, and may be releasably mounted thereto.

[0064] The fabric sheet 18 has a plurality of open-ended sleeves, such as sleeve 20, in which a respective first or second support pole 14, 15 resides, so that the first and second support poles 14, 15 support the fabric sheet when the structure is erect.

[0065] The joint 12, illustrated in detail in Figure 3 in the erected position, is used to connect each of the first and second support poles 14, 15 at a non-zero angle relative to each other. Put another way, a longitudinal axis of the first support pole 14 is non-parallel relative to a longitudinal axis of the second support pole 15. It shall be appreciated that in alternative embodiments, the joint 12 may be used to connect first and second support poles in a substantially parallel relationship. The angled first and second support poles 14, 15 help to increase the space available in the portable structure 10 and help to define a substantially domed shape of the portable structure 10. The fabric sheet 18 is suspended from the first and second support poles 14, such that the fabric sheet 18 is located internally with respect to said first and second support poles 14, 15. However, in an alternative embodiment, the fabric sheet 18 is attached such that it lies external to the first and second support poles 14, 15.

[0066] Although not illustrated, the portable structure 10 may further include a fabric sheet overlying the outside of said support poles 14, 15 referred to hereafter as a cover sheet, but in the angling equipment industry as a "skull cap". The cover sheet lies substantially in parallel with the fabric sheet 18 which lies under the first and second support poles 14, 15. In this way, the portable structure 10 is provided with a double skin which, when required for relatively long durations, such as for overnight use, significantly reduces problems associated with condensation. The cover sheet may extend over the second support poles 15. The cover sheet may be connected to the joint 12, the mounting block 16 and / or the second support poles 15.

[0067] The cover sheet may be arranged to extend radially outward of the fabric sheet 18, the outwardly extending portion of the cover sheet acting as a peak to inhibit rainwater entering the portable structure 10. For example, a portion of the second sheet may extend radially outward of the sheet 18 between any two of the second support poles 15 in order to inhibit rainwater from entering the open side of the portable structure 10.

[0068] In the embodiment of the Figures, each of the first and second support poles 14, 15 consists of a single length of aluminium tubing which extends from the joint 12. The first and / or second support poles 14, 15 may be manufactured from any material that is inherently corrosion resistant or coated / treated so as to be corrosion resistant. The corrosion resistant material helps to improve the lifespan of the first and / or second support poles 14, 15, which are subjected to external environmental conditions in use. A thickness defined by each of the first and second support poles 14, 15 may be in the range 0.3mm to 3mm, for example in the range 0.5mm to 2mm. Thicknesses in these ranges have been found to reduce the weight of the first and second support poles 14, 15 and the amount of material required, whilst providing sufficient strength to the portable structure 10.

[0069] The first and second support poles 14, 15 are preformed and attached to the joint 12 and / or the mounting block 16 such to provide the dome-shape of the portable structure 10. Additionally or alternatively, the first and / or second support poles 14, 15 may be single lengths of carbon fibre, glass fibre, reinforced rod, or flexible aluminium alloy tubes which flex to a degree to adopt the required shape of the portable structure 10 during the erection process.

[0070] The first and / or second support poles 14, 15 define a cross-sectional profile. In this embodiment, the cross-sectional profile defines at least one anti-rotation feature 22a, 22b, illustrated in Figure 6. The anti-rotation feature 22a, 22b is configured to help prevent rotation of the first and / or second support pole 14, 15 relative to the joint 12. The anti-rotation feature 22a, 22b therefore helps to improve ease of erection of the portable structure 10, in particular if the poles are curved, to ensure the correct overall shape of the structure 10 can be easily achieved during the erection process. In the embodiment of Figure 6, the anti-rotation feature includes a flat 22a, 22b. The remainder of the cross-section of the support pole 14 is circular, such that the flat 22a, 22b intersects the circle to form a chord. It shall be appreciated that in alternative embodiments, any suitable anti-rotation formation may be used, such as a protrusion or a notch, or no anti-rotation feature may be provided.

[0071] Although multiple joints are illustrated in Figures 1 and 2, for reasons of conciseness and brevity only one joint 12 will be described hereafter. It shall be appreciated that any combination of the features of joint 12 may be applicable to any of the remaining joints 12.

[0072] A detailed isometric view of the joint 12 is shown in Figure 3. The joint 12 includes a body 24 with a first section 26a and a second section 26b, the first support pole 14, the second support pole 15 and a latching mechanism 28 (see Fig. 5). In the embodiment of Figure 3, the joint 12 further includes a mounting arrangement 30, an attachment feature 32 and a hinge 34. It shall be appreciated that in alternative embodiments, any combination of these features may be included.

[0073] The first and second sections 26a, 26b are manufactured from a polymer material, for example a polyamide polymer. It shall be appreciated that in alternative embodiments, the first and second sections 26a, 26b are injection moulded, however it shall be appreciated that in alternative embodiments, any suitable manufacturing process may be used. The first and or second sections 26a, 26b include a fibre reinforcement arrangement. The fibre reinforcement arrangement may be glass fibre reinforcement, or in alternative embodiments carbon fibre reinforcement, for example. In other embodiments the sections may be manufactured from other suitable material, e.g. die cast metal.

[0074] The first section 26a and the second section 26b are configured to be pivotable relative to each other about a pivot axis between a collapsed position, illustrated in Figure 4, and an erected position, illustrated in Figure 3. The first section 26a includes a first end located towards the second section, and a second free end. The second section 26b includes a first end located towards the first section 26a, and a second free end. When the body 24 is in the erected position, the first end of the first section 26a abuts against the first end of the second section 26b. The abutting first ends helps to create a cover over the internal components of the joint 12, thereby helping to inhibit ingress of moisture and / or dirt from the external environment.

[0075] The hinge 34 pivotably connects the first and second sections 26a, 26b about a pivot axis that is laterally offset from the longitudinal axes of each of the poles 14, 15. As illustrated in Figures 3 and 4, the hinge 34 includes a pin 34a extending through holes in the first section 26a and the second section 26b. As illustrated in Figure 6, the second section 26b includes a first and second wing 34b, 34c on which the holes are located and the pin 34a is received. The first and second wing 34b, 34c sandwich a portion of the first section 26a therebetween, and the portion of the first section 26a includes a hole that is axially aligned with the holes of the first and second wings 34b, 34c. The pivot pin 34 extends through the axially aligned holes.

[0076] It shall be appreciated that in alternative embodiments, the hinge pin 34a may be in the form of a nut and bolt. In alternative embodiment, any suitable mechanism may be used to pivotably connect the first and second sections 26a, 26b. Alternatively, the first and / or second wings 34b, 34c may be located on the first section 26a.

[0077] The first pole 14 is connected to the first section 26a. The second pole 15 is connected to the second section 26b. This facilitates the pivoting of the first and second pole 14, 15 relative to each other. As illustrated in Figures 7 to 9, the first support pole 14 extends through the first section 26a and the second support pole 15 extends into the second section 26b.

[0078] The first section 26a includes the mounting arrangement 30 configured to mount the first support pole 14 to the first section 26a, and a first bore 27a for receiving the first support pole 14 therein. The first support pole 14 is axially moveable relative to the first section 26a between a retracted position and an extended position, as will be described in more detail below. In alternative embodiments, the first support pole 14 may be fixed relative to the first section 26a and the second support pole 15 may instead be axially moveable relative the second section 26b. In the extended position, the first support pole 14 is configured to be received in the second section 26b. In the extended position, the first support pole 14 extends through the bore of the first section 26a.

[0079] The mounting arrangement 30 is illustrated in Figures 5 and 6. The mounting arrangement 30 includes a mounting body 36a configured to be mounted to the first section 26a, a first mounting formation 36b, 36c, a second mounting formation 36d, 36e and a mounting bore 36f for receiving the first support pole 14. It shall be appreciated that in alternative embodiments, any of these features may be included and / or omitted. The mounting arrangement 30 facilities releasable mounting of the first support pole 14 to the first section 26a.

[0080] The mounting body 36a defines the mounting bore 36f for receiving the first support pole 14 therethrough. The mounting bore 36f includes an anti-rotation feature (not visible) configured to help prevent rotation of the first support pole 14 relative to the first section 26a. It shall be appreciated that when the mounting body 36a is mounted to the remainder of the first section 26a to form the first section 26a, the mounting bore 36f and the first bore 27a define one bore through which the first support pole 14 is axially moveable.

[0081] The anti-rotation feature of the mounting body 36a corresponds to the anti-rotation feature 22a of the first support pole 14. Accordingly, the anti-rotation feature includes a flat. The cross-sectional profile of the mounting bore 36f is substantially circular, such that the flat intersects the circle to form a chord. It shall be appreciated that in alternative embodiments, any suitable anti-rotation formation may be used to correspond to the anti-rotation feature 22a of the first support pole 14. For example, if the anti-rotation feature 22a of the first support pole 14 is a protrusion, the anti-rotation feature of the mounting bore 36f may be a notch, and vice-versa.

[0082] The first mounting formation 36b, 36c is located on the first section 26a. The second mounting formation 36d, 36e is located on the mounting body 36a. The first mounting formation 36b, 36c is configured to engage with the second mounting formation 36d, 36e to mount the first support pole 14 to the first section 26a.

[0083] In the embodiment of Figures 5 and 6, the first mounting formation 36b, 36c is configured to receive the second mounting formation 36d. 36e in a clip-fit arrangement. It shall be appreciated that in alternative embodiment, a snap-fit arrangement or a push-fit arrangement may be used. Alternatively, the first and second mounting formations 36b-36e may be corresponding threads, and the mounting body 36a may be screwed into the first section 26a or complementary bayonet fittings, for example.

[0084] The first mounting formation 36b, 36c is a groove, channel, recess or hole configured to receive the second mounting formation 36c. A pair of first mounting formations 36b, 36c are provided on opposing lateral sides of the first section 26a. It shall be appreciated that in alternative embodiments, any suitable number of first mounting formations 36b, 36c may be provided at any suitable location on the first section 26a. As illustrated in Figure 6, by way of example, each of the first mounting formations 36b, 36c may include an axial groove located on an interior surface of the first section 26a configured to guide the second mounting formations 36d, 36e therein, and a hole configured to receive the second mounting formations 36d, 36e in the clip-fit arrangement. The groove is located in between the mounting body 36a and the hole. The groove includes a chamfered opening configured to facilitate guiding of the second mounting formation 36d, 36e in the groove.

[0085] The second mounting formation comprises a tooth located on a tongue (in this embodiment two teeth 35a, 35b on two corresponding tongues 36d, 36e) extending from the mounting body 36a in a direction parallel to a central longitudinal axis of the first support pole 14. The teeth 35a and 35b are configured to engage with the first mounting formation 36b, 36c. The teeth 35a and 35b extend away from the first support pole 14 in a direction substantially perpendicular to the longitudinal axis of the first support pole 14. The pair of second mounting formations 36d, 36e are provided on opposing lateral sides of the mounting body 36a, corresponding to the pair of first mounting formations 36b, 36c. The tongues 36d, 36e are arranged to flex resiliently to facilitate engagement and disengagement of the teeth 35a, 35b in this embodiment. It shall be appreciated that in alternative embodiments, any suitable number of second mounting formations 36c, 36d may be provided at any suitable location on the mounting body 36a.

[0086] It shall be appreciated that in alternative embodiments, the arrangement may be reversed - i.e. the first mounting formation may include the tongue and / or tooth 36c, 36d, and the second mounting formation may include the groove, channel recess or hole.

[0087] The second section 26b includes a second bore 27b for receiving the second support pole 15, the attachment feature 32, and a retention arrangement 40. The retention arrangement 40 defines a longitudinal axis, and the second bore 27b defines a longitudinal axis, and the longitudinal axes are arranged at a non-zero angle. This helps to facilitate the non-zero angle of the first and second support poles 14, 15 when the joint 12 is in the erected position. It shall be appreciated that in alternative embodiment wherein the first and second support poles 14, 15 are parallel, the second bore 27b and the retention arrangement 40 may be substantially parallel.

[0088] The second bore 27b includes an anti-rotation feature (not visible) configured to help prevent rotation of the first support pole 14 relative to the first section 26a. The anti-rotation feature of the second bore 27b corresponds to anti-rotation feature 22b of the second support pole 15. Accordingly, the anti-rotation feature includes a flat. The cross-sectional profile of the second bore 27b is substantially circular, such that the flat interests the circle to form a chord.

[0089] The second support pole 15 is fixed relative to the second section 26b. The second support pole 15 is fixed in an axial direction relative to the second section 26b. A diameter of the second support pole 15 is approximately equal to a diameter of the second bore 27b. This helps to radially restrict the second support pole 15 relative to the second bore 27b.

[0090] The second support pole 15 is fixed to the second section 26b by a rivet 31, illustrated in Figure 7 to 9. The rivet 31 extends through the second section 26b and through the second support pole 15. It shall be appreciated that in alternative embodiments, any suitable mechanism may be used to fix the second support pole 15 to the second section 26b, for example, a nut. The fixing mechanism may be embedded in the second section 26b.

[0091] The retention arrangement 40 engages with the first support pole 14 when the support pole 14 is in the extended position and the body 24 is in the erected position. The retention arrangement is illustrated in Figures 7 to 9. The retention arrangement 40 includes a retention bore 40a located within the second section 26b and a chamfered edge 40b. It shall be appreciated that in alternative embodiments, any suitable retention arrangement may be used.

[0092] The retention bore 40a is coaxial with the first support pole 14 when the joint 12 is in the erected position. This provides a space into which the first support pole 14 can extend and retract, as well reducing the overall weight of the joint 12. The retention bore 40a includes the chamfered edge 40e. The chamfered edge 40b is located towards the first section 26a of the body. The chamfered edge 40b corresponds to a chamfered edge 14a of the first support pole 14. The chamfered edge 40b of the retention bore 40a is configured to guide the chamfered edge 14a of the support pole 14 into the retention bore 40a when the body 24 is moved between the collapsed position and the erected position. It shall be appreciated that in alternative embodiments, the chamfered edge may be omitted. Alternative, any suitable profile of edge may be used to facilitate relative guiding, for example a curved edge.

[0093] Guiding of the chamfered edge 14a of the support pole 14 over the chamfered edge 40b of the retention bore 40a helps to facilitate smooth sliding when the body 24 moves between the collapsed and retracted positions. The chamfered edges 14a, 40b may be particularly advantageous when the first support pole 14 is retracted and the body 24 moves between the collapsed position and the erected position, as illustrated in Figure 9, because the corresponding chamfers prevent the second section 26b from obstructing the first support pole 14 when the first section 26a is pivoted, as will be described in more detail below.

[0094] The latching mechanism 28 is configured to releasably secure the first section 26a to the second section 26b in the erected position of the body 24. The latching mechanism 28 includes the first support pole 14, the retention arrangement 40, a resilient member 42 and a confinement feature 44. It shall be appreciated that in alternative embodiments, any combination of these features may be included and / or omitted. When the support pole 14 is in the extended position and the first bore 27a of the first section is aligned with the retention bore 40a of the second section 26b, the support pole 14 extends within the second section 26b of the body to engage with the retention arrangement 40 and achieve latching.

[0095] In this embodiment, the resilient member is a compression spring 42 mounted such that a coil of the spring encircles the first support pole 14, and is axially restrained relative to the first support pole 14 at a first end and to the first section 26a at a second end. The compression spring 40 is coupled to the first support pole 14 in such a way that when the first support pole 14 is in the retracted position, the compression spring 40 deforms from its relaxed state due to the force exerted on the first support pole 14 by the user. The compression spring 42 biases the first support pole 14 into the extended position when there are no external forces acting on the first support pole 14, i.e. the force exerted by the user.

[0096] In alternative embodiments, any suitable resilient member may be used, for example an elastomeric element. A stiffness value of the resilient member 42 is selected such that the resilient member exerts a sufficient biasing force to achieve secure latching, whilst the user is able to overcome the biasing force to move the body from the erected position into the collapsed position.

[0097] The resilient member 42 is configured to bias the first support pole 14 into the extended position, illustrated in Figure 6. Thus, when latching is achieved between the first and second section 26a, 26b, the first support pole 14 performs the function of a latching member and is biased into the extended position within the retention arrangement 40.

[0098] The first support pole 14 is confined in a first axial direction towards the second free end of the first section 26a. The first support pole 14 is confined in a second axial direction towards the first end of the first section 26a located towards the second section 26b. The confinement of the first support pole 14 in the first and / or second axial direction helps to confine the first support pole 14 within the first section 26a to prevent the first support pole 14 from retracting / extending out of the first section 26a of the body.

[0099] The confinement feature 44 is configured to confine movement of the first support pole 14 in the first and / or second axial direction. The confinement feature 44 is located a predetermined distance from the first end of the first support pole 14. The predetermined distance defines a latching portion of the first support pole 14. The confinement feature 44 is a radial protrusion 44. In the embodiment of the Figures, as illustrated in Figures 7 to 9, the confinement feature 44 is a pin 44. The pin 44 extends through the cross section of the first support pole 14. The pin 44 extends through a first side and a second side of the first support pole 14, however in alternative embodiment the pin may only extend through one side. Any alternative radial protrusion may be used, for example at least one leg extending from the first support pole 14, or a radial ring mounted to the exterior surface of the first support pole 14.

[0100] The mounting bore 36f defines a first shoulder 46a, and the first shoulder 46a defines a diameter. The diameter of the first shoulder 46a is less than a diameter of the radial protrusion 44, such that when the first support pole 14 is in the retracted position of Figure 8, the radial protrusion 44 abuts against the first shoulder 46a. As the diameter of the first shoulder 46a is less than the diameter of the radial protrusion 44, the first support pole 14 is axially confined in this direction.

[0101] The first bore 27a of the first section 26a is stepped and a second shoulder 46b defines the transition from a smaller diameter and larger diameter portion thereof. The larger diameter portion of the first bore 27a defines a diameter greater than the diameter of the radial protrusion 44 such that axial movement therebetween in facilitated. The smaller diameter is approximately the same diameter as that of the first support pole 14. The diameter of the second shoulder 46b is less than the diameter of the radial protrusion 44, such that when the first support pole 14 is in the extended position of Figure 9, the radial protrusion 44 abuts against the second shoulder 46b and the first support pole 14 is axially confined in this direction.

[0102] The pin 44 extending through the first support pole 14 is particularly advantageous, because it helps to fix the position of the pin 44 relative to the first support pole 14 even when a force is exerted thereon by the first or second shoulders 46a, 46b. As illustrated in Figure 5, the first and second mounting formations 36b-e are circumferentially offset from the pin 44 relative to the longitudinal axis of the first support pole 14. The circumferential offset helps to prevent the pin 44 from obstructing engagement of the first and second mounting formations 36b-e. The circumferential offset may be any suitable angle, for example approximately 90°.

[0103] Due to the relative diameters of the smaller diameter part of the first bore 27a and the mounting bore 36f compared with the diameter of the first support pole 14 being a running fit (e.g. a free running fit), the first bore 27a and the mounting bore 36f maintain the co-axial relationship of the first support pole 14 with the first section 26a, whilst permitting the axial movement. This helps to improve the stability of the joint 12, and helps to reduce unwanted movement of the first support pole 14 relative to the second support pole 15 both during erection of the portable structure 10 and when the portable structure 10 is erected and in use.

[0104] The latching mechanism 28 is configured to automatically retract the first support pole 14 when moving from the collapsed position of Figure 7 to the erected position of Figure 9. The retention arrangement 40 is configured to automatically retract the first support pole 14. The automatic retraction of the first support pole 14 is illustrated in Figure 8. As the first section 26a is rotated towards the second section 26b, i.e. from the position of Figure 7 to that of Figure 8, due to the biasing of the first support pole 14 into the extended position by the resilient member 42, the first support pole 14 extends axially from the first end of the first section 26a.

[0105] Accordingly, the first end of the second section 26b engages with the first end of the first support pole 14 before abutting against the first end of the first section 26a. As the first end of the second section 26b engages the first end of the first support pole 14 and continues to be rotated by the user, the first support pole 14 is automatically retracted by the force exerted by the second section 26b, because the force overcomes the biasing force from the resilient member 42. The rotation also causes the first support pole 14 to slide over the first end of the first section. In the embodiment of Figures 7 to 9, it is the chamfered edge 40b that engages the corresponding chamfered edge 14a of the first support pole 14 and pushes the first support pole 14 from the extended position towards the retracted position, thereby acting as a guide formation.

[0106] In the embodiment illustrated in Figures 7 to 9, the chamfered edge 14a of the first support pole 14 is provided on a bung or a plug 13. The chamfered edge 14a is provided on an enlarged head of the bung. The bung 13 is inserted into the tubular profile of the first end of the first support pole 14. The bung 13 is particularly advantageous because it can be manufactured from a different material to the first support pole 14, for example an elastomeric material. This helps to facilitate smoother relative sliding between the chamfered edge 14a and the chamfered edge 40b, and may help to reduce surface damage.

[0107] The bung 13 may be mounted to the first end of the first support pole 14 by any suitable mechanism. In the embodiment of Figures 7 to 9 wherein the confinement feature is a pin 44, the pin 44 extends through the bung 13 and mounts the bung 13 to the first support pole 14. This helps to reduce the number of mounting components. Alternatively, the bung 13 may be push-fitted or screwed into the first support pole 14.

[0108] In an alternative embodiment, the confinement feature 44 may be provided on the bung 13. The bung 13 may include a radial protrusion, for example a stepped radial protrusion extending radially outwardly through a hole of the first support pole 14. The radial protrusion of the bung 13 would function in substantially the same way as the pin 44 and abut against the first and second shoulders 46a, 46b to achieve axial confinement.

[0109] The latching mechanism 28 is configured to automatically extend the first support pole 14 when the first support pole 14 and the retention arrangement 40 are coaxial and there is no external force exerted on the first support pole 14, as illustrated in Figure 9. Once the first section 26a has been rotated into the position of Figure 9, and the chamfered edge 14a of the first support pole 14 has been guided over the chamfered edge 40b of the retention arrangement 40, the first support pole 14 and the retention bore 40a of the retention arrangement 40 are coaxial. In the coaxial position, the first end of the second section 26b no longer exerts a force on the first end of the first support pole 14. Due to the biasing of the first support pole 14 into the extended position by the resilient member 42, the first support pole 14 automatically extends into the retention bore 40a.

[0110] The attachment feature 32 is configured to attach a component of the portable structure 10 to the joint 12. For example, the attachment feature 32 may be used to attach the cover sheet, described above, to the joint 12. In the embodiment of the Figures, the attachment feature 32 is located on the second section 26b. The attachment feature 32 is located at or towards the first end of the second section 26b. Locating the attachment feature 32 on the second section 26b helps to ensure the attachment of the second sheet to the attachment feature 32 does not cover or obstruct the erection and collapse of the body 24. Locating the attachment feature 32 towards the first section 26a is particularly advantageous when the component of the portable structure is the cover sheet, because the location of the attachment feature 32 helps to keep the sheet taut when the portable structure 10 is erected.

[0111] The attachment feature 32 is a protrusion extending from an exterior surface of the second section 26a. The protrusion 32 defines a loop or hook configured to receive the cover sheet therethrough. For example, the cover sheet may include a corresponding attachment feature, such as a tie, for tying to the protrusion, or a hook. In alternative embodiments, the protrusion may be for, example, a protrusion with an enlarged head, and the tie may be tied around the protrusion such that the enlarged head acts as a stopper. Alternatively, the attachment feature 32 may be in the form of holes or grooves, and the tie may be threaded through the holes or grooves. It shall be appreciated that any suitable attachment feature 32 may be used.

[0112] A method of assembly the first support pole 14 and the first section 26a of the Figures will be described hereafter. The bung 13 is inserted into the first end of the first support pole 14 such that the enlarged head of the bung 13 abuts against the first end of the first support pole 14. A bore is drilled through the bung 13 and the first support pole 14 (or pre-formed bores are aligned during insertion). The bore is arranged transverse to the central longitudinal axis of the first support pole 14. The mounting body 36a and spring are then slid onto the first support pole from the bung end past the bore. The pin 44 is located in the bore to secure the bung 13 to the first support pole 14.

[0113] The first section 26a is then slid onto the first support pole 14 from the bung end until it abuts the pin 44. The mounting body 36a is slid axially relative to the support pole 14 back towards the bung 13 until the tongues 36d, 36e of the second mounting formation engage in a clip-fit with the grooves 36b, 36c of the first mounting formation. Due to the anti-rotation features of the bores 27a, 36a and the support pole 14, the first and second mounting formations 36b-d are in alignment and engage in the clip-fit without the need for manual alignment.

[0114] In alternative embodiments wherein the anti-rotation features are omitted, the first support pole 14 may be rotated such that the first and second mounting formations 36b-d are in alignment. The clip-fitting of the first and second mounting formations 36b-d releasably mounts the first support pole 14 to the first section 26a.

[0115] A method of erecting and collapsing the portable structure 10 will be described hereafter. The portable structure 10 is typically firstly removed from the storage bag, and the portable structure 10 is laid out such that the second support poles 15 are moved circumferentially so as to spread them out. The user forms the basic arrangement of the structure by aligning and holding together the two halves of the mounting block 16. In the aligned position, the second support arms 15 extend generally radially from said mounting block 16.

[0116] In order to move each joint 12 from the collapsed into the erected position, the first section 26a is pivoted from the collapsed position of Figure 7 about the hinge 34 towards the second section 26b. As illustrated in Figure 8, the chamfered edge 40b of the retention arrangement 40b automatically retracts the first support pole 14 relative to the first section 26a. The first section 26a is rotated until the first end of the first section 26a abuts against the first end of the second section 26b. In this position, illustrated in Figure 9, the first support pole 14 is axially aligned with the retaining bore 40a. The spring 42 biases the first support pole 14 into the extended position within the retention arrangement 40 and latching is achieved. The steps are repeated for each of the joints 12, for example for four more joints 12 in the embodiments of Figures 1 and 2.

[0117] In order to collapse the joint 12, an axial force is exerted by the user on the first support pole 14. The force overcomes the biasing force of the spring 42, and the first support pole 14 is retracted. Once the first support pole 14 is retracted out of the retention arrangement 40, the first section 26a is rotated away from the second section 26b. The user releases the first support pole 14, and the first support pole 14 moves into the extended position under the biasing force of the spring 42. The steps are repeated for each of the joints 12, for example four more joints 12 in the embodiments of Figure 1 and 2.

[0118] Although the teachings have been described above with reference to one or more preferred embodiments, it will be appreciated that various changes or modifications may be made without departing from the scope as defined in the appended claims. For example a similar joint may be used for other structures such as fishing pole supports, chair legs and table legs.

Claims

1. A joint (12) for a portable structure (10) for providing temporary protection for at least one person from environmental conditions, the joint (12) comprising: a body (24) having a first section (26a) and a second section (26b) configured to be pivotable relative to each other about a pivot axis between a collapsed position and an erected position; a first support pole (14) and a second support pole (15) pivotable relative to the first support pole (14), wherein the first support pole (14) is connected to the first section (26a) and the second support pole (15) is connected to the second section (26b); and a latching mechanism (28) configured to releasably secure the first section (26a) to the second section (26b) in the erected position, wherein the latching mechanism (28) comprises: a retention arrangement (40) located on the second section (26b); and the first support pole (14); wherein the first support pole (14) is axially moveable relative to the first section (26a) between a retracted position and an extended position, and wherein in the extended position the first support pole (14) is configured to extend within the second section (26b) of the body (24) to engage with the retention arrangement (40) and achieve latching; characterised in that: the latching mechanism (28) is configured such that the first support pole (14) is automatically retracted when moving from the collapsed to the erected position.

2. The joint (12) according to claim 1, wherein the latching mechanism (28) includes a resilient member (42) configured to bias the first support pole (14) into the extended position, optionally wherein the resilient member (42) is a spring (42).

3. The joint (12) according to any preceding claim, wherein the latching mechanism (28) is configured to automatically extend the first support pole (14) when the first support pole (14) is axially aligned with the retention arrangement (40) during erection.

4. The joint (12) according to any preceding claim, wherein the retention arrangement (40) comprises a retention bore (40a) located within the second section (26b), and wherein the retention bore (40a) is substantially coaxial with the first support pole (14) when the joint (12) is in the erected position.

5. The joint (12) according to claim 4, wherein the retention bore (40a) comprises a chamfered edge (40b) located towards the first section (26a) of the body (24).

6. The joint (12) according to claim 5, wherein the first support pole (14) comprises a corresponding chamfered edge (14a) located towards the second section (26b) of the body (24), and optionally wherein the chamfered edge (40b) of the retention bore (40a) is configured to guide the chamfered edge (14a) of the first support pole (14) into the retention bore (40a) when the body (24) is moved between the collapsed position and the erected position.

7. The joint (12) according to any preceding claim, wherein the first support pole (14) is confined in a first axial direction towards a second free end of the first section (26a), optionally wherein the first support pole (14) is confined in a second axial direction towards a first end of the first section (26a) located towards the second section (26b), optionally wherein the first support pole (14) comprises a confinement feature (44) configured to confine movement of the first support pole (14) in the first and / or second axial direction.

8. The joint (12) according to claim 7, wherein the confinement feature (44) comprises a radial protrusion (44) extending transverse relative to a central longitudinal axis of the first support pole (14).

9. The joint (12) according to any preceding claim, wherein the first section (26a) comprises a mounting arrangement (30) configured to mount the first support pole (14) to the first section (26a), optionally wherein the first support pole (14) is releasably mounted to the first section (26a), optionally wherein the mounting arrangement (30) comprises a mounting body (36a) configured to be mounted to the first section (26a), and wherein the first support pole (14) extends through the mounting body (36a).

10. The joint (12) according to claim 9, wherein the mounting arrangement (30) comprises a first mounting formation (36b, 36c) located on the first section (26a), and a second mounting formation (36d, 36e) located on the mounting body (36a), and wherein the first mounting formation (36b, 36c) is configured to engage with the second mounting formation (36d, 36e) to mount the first support pole (14) to the first section (26a), optionally wherein the first mounting formation (36b, 36c) is configured to receive the second mounting formation (36d, 36e) in a clip-fit arrangement.

11. The joint (12) according to claim 10, wherein the first and second mounting formations (36b-e) are circumferentially offset from the confinement feature (44) relative to a central longitudinal axis of the first support pole (14).

12. The joint (12) according to claim 10 or claim 11, wherein the second mounting formation (36d, 36e) is a tooth (35a, 35b) configured to engage with the first mounting formation (36b, 36c), optionally wherein the tooth (35a, 35b) is arranged on a tongue (36d, 36e) extending from the mounting body (36a) in a direction parallel to a central longitudinal axis of the first support pole (14).

13. The joint (12) according to any one of claims 10 to claim 12, wherein the first mounting formation (36b, 36c) is a groove, channel, recess or hole configured to receive the second mounting formation (36d, 36e).

14. The joint (12) according to claim 9, wherein the mounting body (36a) defines a mounting bore (36f) for receiving the first support pole (14) therethrough, and wherein the mounting bore (36f) comprises an anti-rotation feature configured to interface with a corresponding anti-rotation feature (22a) of the first support pole (14), optionally wherein the anti-rotation feature (22a) comprises at least one flat.

15. A portable structure (10) for providing temporary protection for at least one person from environmental conditions, the portable structure (10) comprising: a joint (12) according to any preceding claim; and a sheet (18) attachable to the joint (12).

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