SE1551248A1 - Monolithic releasing slider for curtains - Google Patents

Abstract

5 12 ABSTRACT The present invention discloses a slider (100) for Weight dependent release of athereto attached load (400) When being in cooperation With a stationary guide (200). The slider(100) comprises an internal element (110), an intermediate element (120) and a releasing element (130). A slider assembly (500) and a curtain assembly are also described. To be published With Pig. 3.

Description

MONOLITHIC RELEASING SLIDER TECHNICAL FIELDThe present invention relates to a monolithic releasing Slider, more particular for release of a thereto attached curtain.

BACKGROUND Institutions housing persons with an increased probability of being in a state of despairhas to undertake suitable measures to prevent suicides. For example, housing facilities ofpsychiatric hospitals, political refugee accommodations and prisons are typically devoid offumiture and equipment that could be employed for committing suicide. Curtains are oftenused in suicide attempts and suicides as means for strangulation by hanging therefrom in a tiedsling. Such attempts are often successful if the curtain is fastened to the ceiling or wall to sucha degree that it may support the weight of a person. Means in the form of curtain hangers witha pre-defined upper limit of support weight, i.e. a release weight, above which the curtainhanger will come loose from the curtain, wall or ceiling, minimizes the usability of theretoattached curtains in the act of suicide.

GB2359480 A describes a curtain hanger having a head which can be insertedupwards into the track of a curtain rail. The head has semicircular resilient parts which enablesmounting of the runner by an upwards push into the track.

WO94249l2 discloses a curtain hanger with sliding body. The sliding body is made ofan elastic material and has two holding members hooked inside a reception slot of a curtain rodhollow rail.

The release weight of the curtain hangers of GB2359480 A, WO94249l2 and othersimilar curtain hangers of the prior-art, is highly dependent on the interaction and interplaybetween the curtain rail and the part of the curtain hanger which is contacting the curtain railduring operation. For example, such curtain hangers may have a release weight which issignificantly higher when mounted in a curtain rail with horizontal contacting surfaces ascompared to the case of downwards slanting contacting surfaces. This brings about onedisadvantage of today°s common curtain hangers when such are considered for use in abovementioned institutions. The user would have to make sure that the particular combination oftype of rail and hanger is appropriate in each case. Other disadvantages of present hangersinclude, for example, a significant dependence between the release weight and the angle relative the horizontal plane by which the weight is applied. ln view of at least above mentioned disadvantages, improved curtain hangers in the form of releasing sliders, are highly needed.

SUMMARY It is an object of the invention, considering the disadvantages mentioned above, toprovide a releasing slider with a release weight which is not dependent, or only dependent to alimited degree, on the detailed design of the curtain rail which it cooperates with.

It is another object of the invention, to provide a releasing slider with a release weighthaving a dependence on the angle relative the horizontal plane of the applied weight, whichdependence is minimized.

It is yet another object of the invention, to provide a releasing slider which can be produced as one monolithic unit by molding of a thermoplastic material.

These and other objects, which will appear from the following description, have nowbeen achieved by a slider for weight dependent release of a thereto attached load when being incooperation with a stationary guide, comprising an internal element, an intermediate elementand a releasing element, wherein the internal element being adapted to prevent movement ofthe slider towards a lower position relative the stationary guide, when the slider is mounted inor to the stationary guide; the intemal element being adapted to allow movement of the sliderin both of a proximal direction and a distal direction relative the stationary guide, when theslider is mounted in or to the stationary guide; the lower side of the internal element beingprovided with at least two contact points or contact areas which are facing downwards andcontacting the stationary guide, when the slider is mounted in or to the stationary guide; theupper end of the intermediate element being attached to the lower side of the intemal element,and the lower end of the interrnediate element being attached to the upper end of the releasingelement, for the provision of a distance between the upper end of the releasing element and thestationary guide, when the slider is mounted in or to the stationary guide; the releasing elementcomprises a first grabber and a second grabber defining an open space there in between; theopen space being adapted to receive a mechanical element which provides transfer of the forceof the weight of the attached load; one end of the first grabber and one end of the secondgrabber being separated by a cessation located essentially at the lowest end of the slider; and atleast one of the first grabber and the second grabber being resilient and existing in one state ofa relaXed state, which relaXed state is attained in the absence of any extemal force on the firstgrabber or the second grabber, and a separated state, which separated state is attained in thepresence of an extemal separating force on the first grabber and on the second grabber, inwhich separated state the one end of the first grabber and the one end of the second grabberbeing separated by a distance being greater than the corresponding distance in the relaXed stateand eXceeding the maximal distance during which the releasing element is able to support theattached load.

According to another aspect, there is disclosed a slider assembly, comprising the sliderand a stationary guide, wherein the stationary guide having an elongated shape being straightor curved, and having an intemal hollow space; the stationary guide being provided with a leftrail, a right rail and an open track between the furthermost right end of the left rail and the furtherrnost left end of the right rail; the stationary guide being adapted to enclose the intemal element within the internal hollow space; the open track being adapted to enclose theintermediate element; and the open track being adapted to prevent passage of the internal element from its upper side to its lower side and from its lower side to its upper side.

Further features of the invention and its embodiments are set forth in the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects, features and advantages of which the invention is capablewill be apparent and elucidated from the following description of non-limiting embodiments,reference being made to the accompanying drawings, in which Fig. 1 is a view from a lower 3b proXimal la side of a slider 100 having a rectangularshaped projection from the upper 3a side, comprising an intemal element 110, an interrnediateelement 120 eXtending downwards from a part of the lower 3b side of the intemal element 110,a releasing element 130 in a relaxed state eXtending downwards from a part of the lower 3bside of the intermediate element 120 and being constituted by a first grabber 131 and a secondgrabber 132, and a cessation 133 between the lower 3b ends of the first grabber 131 and thesecond grabber 132 located at the lower 3b end of the releasing element 130, according to oneembodiment; Fig. 2 is a view of the slider 100 of Fig. 1 from the (Az) distal lb lower 3b left 2b sideand (Bz) from the proXimal la upper 3a left 2b side showing the intemal element 110 and theinterrnediate element 120 together forrning T-shaped proXimal 1a and distal 1b projections withessentially horizontal lower 3b sides, according to one embodiment; Fig. 3 is a view of a slider assembly 500 from a lower 3b proXimal la left 2b side,comprising the slider 100 of Fig.1 mounted with its internal element 110 inside the internalhollow space of a stationary guide 200 having a left rail 211, a right rail 212 and an open track220 there in between, through which open track 220 the interrnediate element 120 is eXtendingdownwards and into the space outside of the stationary guide 200, according to oneembodiment; Fig. 4 is a view of the slider assembly of Fig. 3 in an interrnediate state showing aweight transfer element 310 having a distorted circular shape being thread through an openspace between the first grabber 131 and the second grabber 132, which weight transfer element310 is providing transfer of the force of the thereto attached load 400 in the form of a curtain300 to the first grabber 131 and the second grabber 132 to slightly increase the cessation 133,whereby eXit from a relaXed state and entrance of an intermediate state is achieved, accordingto one embodiment; Fig. 5 is a view of the slider assembly of Fig. 3 in an interrnediate state showing aweight transfer element 310 in the form of a hook with an open end being thread through anopen space between the first grabber 131 and the second grabber 132, according to one embodiment; Figs. 6 A-B are perspective views of a slider 100 With a lower 3b side of the internalelement 110, which internal element 110 has an angle relative the horizontal plane, accordingto one embodiment; and Figs. 7 A-B are perspective views of a slider 100, comprising a restrictor 134 locatedat the junction between the interrnediate element 120 and the releasing element 130, and a circular disc shaped internal element 110, according to one embodiment.

DETAILED DESCRIPTION Embodiments of the present invention will be described in more detail below withreference to the accompanying drawings (Figs. 1 to 7) in order for those skilled in the art to beable to carry out the invention. The invention may, however, be embodied in many differentforms and should not be construed as limited to the embodiments set forth herein. Rather, theseembodiments are provided so that this disclosure will be thorough and complete, and will fullyconvey the scope of the invention to those skilled in the art. The embodiments do not limit theinvention, but the invention is only limited by the appended patent claims. Furthermore, theterrninology used in the detailed description of the particular embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention.

The present slider 100 comprises various parts and may form part of assemblies thatcomprise the present slider. For the purpose of aiding the understanding of the relationship, e. g.the spatial relationship, between such various parts and parts of assemblies, a referencecoordinate system depicted in Fig. 1, which is spatially arranged in accordance with the thereinshown example of the present slider, will be used herein unless otherwise noted. With length L,L-axis, distal-proximal axis, central axis or the like is to be understood the extension in adirection from a proximal la point to a distal lb point or from a distal lb point to a proximal lapoint. With width W,W-axis, left-right axis or the like is to be understood the extension in adirection from a right 2a point to a left 2b point or from a left 2b point to a right 2a point. Withheight H, H-axis, bottom-top axis or the like is to be understood the extension in a directionfrom an upper 3a point to a lower 3b point or from a lower 3b point to an upper 3a point. TheL-axis and the W-axis of the coordinate system depicted in Fig. 1 both reside in a “LW-plane”.The L-axis and the H-axis of the coordinate system depicted in Fig. 1 both reside in a “LH-plane”. The LH-plane is perpendicular to the LW-plane and vice versa. When in use, thepresent slider 100 may typically, but not limited to, be spatially arranged such that the LW-plane is essentially equivalent with the horizontal plane of the surrounding. Descriptive use ofthe terms “horizontal” or “vertical”, or the similar, is not to be understood as absolute andlimiting throughout the description as these terms may be used for the explanatory descriptionof intra-system spatial relationships.

The present slider 100 essentially comprises an intemal element 110, a releasingelement 130 and an intermediate element 120. It is adapted to slide along a stationary guide 200, e. g. a curtain rail, for the movement of a load 400, e.g. a curtain, in a direction, such as a direction in e. g. the horizontal plane. Furthermore, it is adapted to release the load 400 if theeffective Weight of the load 400, which is held by the slider 100, eXceeds a threshold. Theinternal element 110 may be held within a continuous open space of the stationary guide 200,which open space defines the route along which the slider 100 may be moved, such asvoluntarily by a user. The internal element 110 may typically consist of a body which issmaller than the continuous open space of the stationary guide 200, to be able to move therein,but simultaneously larger than any opening or slot thereof along the intended path ofmovement, to not fall out of the stationary guide 200. Hence, the internal element 110 preventsmovement of the slider 100 towards a lower position relative the stationary guide 200, butallows movement of the slider 100 in both of a proXimal direction and a distal direction relativethe stationary guide 200, when mounted in or to the same. When being still or moved along thestationary guide 200, the intemal element 110 of the slider 100 may be brought in contact withthe stationary guide 200 via two contact points or contact areas. These two contact points orcontact areas may be located at lower side of the intemal element 110 and facing downwards.Preferably, such contact points or contact areas may be adapted to facilitate movement of theslider 100 along the stationary guide 200, for example by employment of a low frictionmaterial, as known in the art, or by provision of a smooth rounded surface devoid of roughedges. The releasing element 130 may comprise two curved elongations, i.e. a first grabber 131and a second grabber 132, which are eXtending downwards and which lower ends meet or faceeach other in a thereby defined cessation 133, analogously to a finger grip in which the fingerscorrespond to the elongations and the cessation 133 to the interface or opening between thefingertips. An open space is surrounded and defined by the inner surface of first grabber 131and by the inner surface of the second grabber 132, through which an elongated object carryingthe load 400, e. g. a hook or any other kind of mechanical element which provides transfer ofthe force of the weight of the attached load 400 to the first grabber 131 and to the secondgrabber 132, may be threaded. Hence, the open space has an entrance, through which theelongated load 400 carrying object is entering the open space when threaded there through, andan eXit, through which the elongated load 400 carrying object is eXiting the open space whenthreaded there through. An imaginary aXis through the central point of the entrance and thecentral point of the eXit may eXtend essentially in a plane parallel with the plane in which thecentral aXis of the slider 100 is eXtending. At least one, such as both, of the first grabber 131and the second grabber 132 is resilient. When no force is applied to the first grabber 131 and tothe second grabber 132, they exist in a relaXed state and the cessation 133 is minimized orclosed, i.e. the lower endings of the first grabber 131 and the second grabber 132 are brought incontact with each other, by the inherent resiliency. When a large enough force is applied to thefirst grabber 131 and/or to the second grabber 132, a separated state is entered. In the separatedstate, the grabbers are slightly bent and the cessation 133 is maximized to such a degree thatthe elongated load 400 carrying object may fall through the same, whereby the load 400 isreleased from the slider 100. Hence, in a separated state, one end of the first grabber 131 and one end of the second grabber 132 are separated by a distance being greater than the corresponding distance in the relaxed state and exceeding the maximal distance during whichthe releasing element 130 is able to support the attached load 400. An infinite number ofintermediate states exist between the relaxed state and the separated state. In any of thoseinterrnediate states, a force originating from the carried load 400 is applied to the releasingelement 130, which force is not large enough to enable transition into the separated state. Thecessation 133 may be located near or essentially at the lowest end of the slider 100. Forexample, the cessation may be located within the lower one third of the extension of thereleasing element 130 along a vertical axis. Advantages of such a relatively low placement ofthe cessation 133 include e. g. a minimized variability of the force needed to release the load400, i.e. the release weight, in comparison to designs in which the cessation 133 is placed at ahigher position of the releasing element 130. The interrnediate element 120 has, at least, adual function of transferring the force of the carried load 400 from the releasing element 130 tothe internal element 110, and to provide a spatial separation, i.e. a distance, between thereleasing element 130 and the stationary guide 200. Such a spatial separation mayadvantageously minimize the risk of mechanical interaction between the releasing element 130and the stationary guide 200, which could otherwise adventure the intended function of thereleasing element 130. The upper end of the intermediate element 120 is attached to the lowerside of the internal element 110, and the lower end of the intermediate element 120 is attachedto the upper end of the releasing element 130. Furthermore, the interrnediate element 120 isadapted such that it provides a mechanical connection between the releasing element 130 andthe internal element 110 without, or only to a limited degree, interfering with the slidingfunction of the slider 100 along the stationary guide 200. For example, the width of theinterrnediate element 120 may be slightly smaller than the width of an open track 220 betweena left rail 211 and a right rail 212 of the stationary guide 200.

According to one embodiment, the internal element 110 may have a distance from itsproximal end to its distal end which is greater than the corresponding distance from itsfurtherrnost left end to its furtherrnost right end. When such an intemal element 110 is used incombination with e.g. a stationary guide 200 comprising a left rail 211, a right rail 212 and anopen track, the intemal element 110 may not freely rotate within the inner space of thestationary guide 200. Advantages of such a restricted ability to rotate include the achievementof a reduced force needed for release of the carried load 400 when the mechanical element ontowhich this is attached is twisted. For example, a suicidal patient may often try to collect acurtain into a rope-like assembly for tying around the neck and hang therefrom. A twistingforce is then applied to curtain hangers, which will come loose easier if adapted in accordancewith the present embodiment and thus reduce the risk of a successful suicide attempt.

According to one embodiment, the intermediate element 120 may have a distancefrom its proximal end to its distal end which is greater than the corresponding distance from itsfurtherrnost left end to its furtherrnost right end, for prevention of rotation of said intemalelement 110. For example, the length of the intermediate element 120 may exceed the width of an open track 220.

According to one embodiment, the slider 100 may be provided with a restrictor 134 atthe junction between the lower end of the interrnediate element 120 and the upper end of thereleasing element 130. The restrictor 134 may have a distance from the furthermost left end tothe furthermost right end which is greater than the corresponding distance from the furtherrnostleft end to the furthermost right end of the intermediate element 120. For example, the distancefrom the furthermost left end to the furthermost right end of the restrictor 134 may eXceed thewidth of an open track 220. The slider 100 is thereby prevented to move towards a higherposition relative the stationary guide 200. Advantages which this technical effect brings aboutinclude the decreased risk of malfunction due to mechanical interaction between the releasingelement 130 and the stationary guide 200, which may otherwise occur upon application of anupwards directed force on the slider 100.

According to one embodiment, transition from the relaXed state, or any intermediatestate, to the separated state, may occur at a force provided by an applied weight of the attachedload 400 which corresponds to a supported weight of 0.1 to 3.0 kg, such as 0.1 to 2.0 kg, 0.1 to2.0 kg or, preferably 0.2 to 2.0 kg. Such an interval of transition into the separated state isoptimal for the application of the slider 100 as curtain hanger in curtain arrangements designedto minimize the risk of suicide.

According to one embodiment, at least a part of the lower side of the intemal element110 may eXtend in a plane with an angle of 0 to 60 °, such as 10 to 60 ° or 20 to 50 °, relative aplane defined by a furthermost left central point, a furthermost right central point, a furthermostproXimal central point and a furtherrnost distal central point of the slider 100. For example, thelower sides 110 of the intemal element 110 may lean inwards. The contact points or contactareas with a stationary guide 200 comprising a horizontally located left rail 211, a horizontallylocated right rail 212 and an open track there in between will then be biased towards the rightedge of the left rail 211 and the left edge of the right rail 212. The effective sliding area, i.e. thesum of the area of the contact points or contact areas, will then be smaller in comparison to thecase when the lower sides are not leaning inwards. Such a smaller effective sliding area bringsabout the advantageous effect of facilitated sliding due to a smaller frictional counter force.

According to one embodiment, the slider 100 may be made of a suitable plastic orpolymeric material having properties for application as a part of a curtain hanger assembly.Preferably, the plastic material may have a suitable combination, for its intended purpose, oftenacity, rigidity, fatigue resistance, elasticity, and creep deformation resistance. The selectionof a suitable plastic material may easily be made by the one skilled in the art. The one skilled inthe art may also perform standard eXperiments in order to screen a range of plastic materials,whereby a suitable plastic material may be selected on the basis of the results of sucheXperiments. A suitable plastic material may have a high creep deformation resistance, i.e. ithas a low tendency to slowly move or deform permanently under the influence of an appliedextemal pressure. A suitable plastic material may have a friction coefficient which allowsfacile sideways movement of the slider 100 along the stationary guide 200. A suitable plastic material may, furthermore, have a suitable elasticity and high three-dimensional memory to allow for the first grabber 131 and the second grabber 132 to maintain the original dimensionsof the cessation 133 in the relaXed state, even after prolonged stay in an intermediate state.EXamples of suitable plastic materials include, but is not lin1ited to, polyoXymethylene andpolyamide, like e. g. nylon 6. Polyoxymethylene and polyamide may advantageously beinjection-molded in the production of the slider 100.

According to one embodiment, the slider 100 may be produced as one monolithicarticle by casting, e. g. by injection molding, an amorphous or liquid material, e. g. amorphousor liquid polyoXymethylene or polyamide. Advantages of this Way of production include areduced cost in comparison to other methods of production, e. g. methods comprising the stepof assembly of two separate parts.

According to one embodiment, a slider assembly 500 may comprise a slider 100 andstationary guide 200. The stationary guide 200 may be straight or curved and comprise anintemal holloW space, in Which the intemal element 110 resides. The stationary guide 200 maytypically comprise a left rail 211, a right rail 212 and an open track 220 between thefurtherrnost right end of the left rail 211 and the furthermost left end of the right rail 212. TheWidth of the open track 220 may be essentially equal to or larger than Width of the intermediateelement 120. The Width of the open track 220 may be smaller than Width of the internalelement 110, to prevent passage there through of the internal element 110.

According to one embodiment, a curtain assembly of the invention may comprise astationary guide 200, a plurality of sliders 100, such as 2 to 25 or 8 to 20, Which partly resideWithin the stationary guide 200 and partly outside the same and a curtain. The curtain may beattached at its upper end via hooks or circular elements to releasing elements 130 of theplurality of sliders 100. Each releasing element 130 may have a transition point into itsseparated state of 0.2 to 2.0 kg. The stationary guide 200 may be mounted stationary to theceiling or Wall of a room. Such a curtain assembly may advantageously be used in rooms hosting persons With an increased suicidal behavior, to decrease the risk of suicide.

In the claims, the term “comprises/comprising” does not eXclude the presence of otherelements or steps. Additionally, although individual features may be included in differentclaims, these may possibly advantageously be combined, and the inclusion in different claimsdoes not imply that a combination of features is not feasible and/or advantageous. In addition, LL 77 LL singular references do not eXclude a plurality. The terms a , an", “first”, “second” etc do notpreclude a plurality. Reference signs in the claims are provided merely as a clarifying example and shall not be construed as limiting the scope of the claims in any Way.

Claims (10)

1. Slider (100) for weight dependent release of a thereto attached load (400) when being incooperation With a stationary guide (200), comprising an internal element (110), anintermediate element (120) and a releasing element (130), wherein - said internal element (110) being adapted to prevent movement of said slider (100) towards alower position relative said stationary guide (200), when said slider (100) is mounted in or tosaid stationary guide (200); - said internal element (110) being adapted to allow movement of said slider (100) in both of aproximal direction and a distal direction relative said stationary guide (200), when said slider(100) is mounted in or to said stationary guide (200); - the lower side of said intemal element (110) being provided with at least two contact pointsor contact areas which are facing downwards and contacting said stationary guide (200), whensaid slider (100) is mounted in or to said stationary guide (200); - the upper end of said interrnediate element (120) being attached to said lower side of saidintemal element (110), and the lower end of said interrnediate element (120) being attached tothe upper end of said releasing element (130), for the provision of a distance between saidupper end of said releasing element (130) and said stationary guide (200), when said slider(100) is mounted in or to said stationary guide (200); - said releasing element (130) comprises a first grabber (131) and a second grabber (132)defining an open space there in between; - said open space being adapted to receive a mechanical element which provides transfer of theforce of the weight of said attached load (400); - one end of said first grabber (131) and one end of said second grabber (132) being separatedby a cessation (133) located essentially at the lowest end of said slider (100); and - at least one of said first grabber (131) and said second grabber (132) being resilient andexisting in one state of a relaxed state, which relaxed state is attained in the absence of anyexternal force on said first grabber (131) or said second grabber (132), and a separated state,which separated state is attained in the presence of an extemal separating force on said firstgrabber (131) and on said second grabber (132), in which separated state said one end of saidfirst grabber (131) and said one end of said second grabber (132) being separated by a distancebeing greater than the corresponding distance in said relaxed state and exceeding the maximal distance during which said releasing element (130) is able to support said attached load (400).

2. Slider (100) according to claim 1, wherein said internal element (110) having a distancefrom its proximal end to its distal end which is greater than the corresponding distance from itsfurtherrnost left end to its furtherrnost right end, for prevention of rotation of said intemalelement (110) and said interrnediate element (120) relative said stationary guide (200), when said slider (100) is mounted in or to said stationary guide (200).

3. Slider (100) according to any one of the preceding claims, wherein said intermediate element(120) having a distance from its proXimal end to its distal end which is greater than thecorresponding distance from its furthermost left end to its furthermost right end, for preventionof rotation of said intemal element (110) and said intermediate element (120) relative said stationary guide (200), when said slider (100) is mounted in or to said stationary guide (200).

4. Slider (100) according to any one of the preceding claims, further provided with a restrictor(134), wherein - said restrictor (134) being mounted at the junction between the lower end of said interrnediateelement (120) and the upper end of said releasing element (130); and - said restrictor (134) having a distance from the furtherrnost left end to the furthermost rightend which is greater than the corresponding distance from the furthermost left end to thefurtherrnost right end of said intermediate element (120); for the prevention of movement of said slider (100) towards a higher position relative said stationary guide (200), when said slider (100) is mounted in or to said stationary guide (200).

5. Slider (100) according to any one of the preceding claims, wherein transition from saidrelaxed state, or any state being an intermediate state between said relaxed state and saidseparated state, to said separated state, occurs as at a force provided by an applied weight of said attached load (400), said applied weight eXceeding 0.1 to 3.0 kg.

6. Slider (100) according to any one of the preceding claims, wherein at least a part of saidlower side of said intemal element (110) eXtend in a plane with an angle of 0 to 60 ° relative aplane defined by a furtherrnost left central point, a furthermost right central point, a furthermost proXimal central point and a furtherrnost distal central point of said slider (100).

7. Slider (100) according to any one of the preceding claims, being monolithic and made of a polymeric material selected from the group consisting of polyoXymethylene and polyamide. ll

8. Slider assembly (500), comprising a slider (100) according to any one of claims 1 to 7 and astationary guide (200), wherein - said stationary guide (200) having an elongated shape being straight or curved, and having aninternal hollow space; - said stationary guide (200) being provided with a left rail (211), a right rail (212) and an opentrack (220) between the furtherrnost right end of said left rail (211) and the furtherrnost left endof said right rail (212); - said stationary guide (200) being adapted to enclose said internal element (110) within saidinternal hollow space; - said open track (220) being adapted to enclose said intermediate element (120); and - said open track (220) being adapted to prevent passage of said internal element (110) from its upper side to its lower side and from its lower side to its upper side.

9. Slider assembly (500) according to claim 8, further provided with a curtain attached directlyor indirectly to a plurality of said sliders (100), via the respective of said releasing elements(130), wherein said stationary guide (200) is mounted stationary to the ceiling or wall of a room, for the provision of a weight dependent releasable curtain.

10. Method for production of a slider (100) according to any one of claims 1 to 7, comprising the step of casting an amorphous or liquid material.