CN103168146A

CN103168146A - Cord tension control for top down/bottom up covering for architectural openings

Info

Publication number: CN103168146A
Application number: CN2011800250980A
Authority: CN
Inventors: T·M·德鲁; J·C·费尔瑙; S·M·藤田; J·L·斯伯雷
Original assignee: Hunter Douglas NV
Current assignee: Hunter Douglas NV
Priority date: 2011-04-28
Filing date: 2011-05-11
Publication date: 2013-06-19
Also published as: AU2011367216A1; KR20140035227A; BR112012027712B1; WO2012150946A3; KR101814840B1; CA2797850A1; EP2702221A2; WO2012150946A2; BR112012027712A2; CA2797850C; EP2702221A4

Abstract

Cord tensioning systems are provided for top down/bottom up coverings to prevent entanglement of lift cords about associated wrap spools by correlating rotation of the wrap spools with translating threaded nuts mounted on threaded shafts rotating in unison with the wrap spools whereby abutment of nuts associated with lift spools prevent over movement of rails associated with the spools and thus entanglement of the lift cords associated therewith.

Description

Architectural opening top-down/curtain line tension of bottom-up abat vent controls

Background of invention

Technical field

The present invention relates generally to architectural opening top-down/bottom-up abat vent, and more specifically relate to a kind of for promoting between extended position and punctured position of preventing that this class abat vent from using with reduce the system that the lifting cord of the horizontal rail in abat vent tangles.

The description of relevant technologies

The telescopic sunshade curtain of architectural opening used many years.The old model of this class telescopic sunshade curtain refers to venetian shutter, wherein at a plurality of horizontal settings of cord ladder upper support, vertical separable slat, and utilize allow slat to promote or reduce with abat vent with respect to the architectural opening that described abat vent is installed and between punctured position and extended position mobile control system.Slat also can be around horizontal axis, vertical axis tilt, so that abat vent is moved between enable possition and fastening position.

Developed recently the honeycomb curtain, wherein the honeycomb of level or positioned vertical can be laterally folded, extends between horizontal rail or vertical rails respectively, make by with rail towards each other or leave each other and move, abat vent can shrink across architectural opening or extend.

Utilize horizontal rail usually to utilize the curtain-lifting wire system to promote or to reduce by one or more rail, to realize extension or the contraction with the collapsible curtain material of rail interconnection with the telescopic sunshade curtain of extension and contraction abat vent.In in early days telescopic sunshade curtain or curtain, an edge of collapsible curtain material can be fixed to first rail, it also comprises the control system of abat vent, the opposite edges of described curtain material are connected to rail of the removable end simultaneously, and rail of the described end can shrink respectively or extend abat vent by control system and is raised or reduces.In other words, by mentioning lower rail towards first rail, the curtain material will fold between it, until abat vent shrinks fully.By reducing end rail, the curtain material will extend across architectural opening.

Along with the differentiation of the scalable curtain of this class, developed top-down/bottom-up abat vent, it generally includes first rail, removable head track and rail of the removable end, and wherein the curtain material extends between head track and end rail.But the lifting cord group of the control system utilization independent lift of this class abat vent or reduction head track and end rail makes abat vent become the top-down abat vent that reduces towards end rail by with head track, or the bottom-up abat vent by end rail is promoted towards head track.In addition, for the diversity across the location of the curtain material of architectural opening, rail can be positioned on any height in architectural opening, and has the spacing of any selection between head track and end rail.

The problem that this class telescopic sunshade curtain meets with is the following fact: lifting cord itself spool in first rail usually is wound around, and when a removable rail moves through the position that is occupied by another removable rail, the lifting cord sometimes becomes and tangles on its related spool, causes the abat vent fault.Although made an effort to avoid this entanglement, still making an effort to process this problem, and the present invention developed into remedy.

Brief summary of the invention

Designed according to a kind of curtain line tension control system of the present invention, to avoid the entanglement of its winding spool in the first rail of the telescopic sunshade curtain of top-down/bottom-up type of curtain-lifting wire-wound.The present invention is by providing contiguous threaded rod to dealing with problems, and described threaded rod is to being adjusted as one man to rotate with the winding spool related with it, and it is also related with the attached specific rail of collapsible curtain material wherein to be wound around spool.Because rail is promote or reduce with related lifting cord, therefore to realize the rotation of cord spool and be wound around the lifting cord around it, thread spindle as one man rotates with it, and comprises in abutting connection with nut, the described rotation along with thread spindle in abutting connection with nut and along its length translation.Thread spindle is enough closely located (wherein every a pair of axle is related with every rail), make will be engaged with each other at the pre-selected locations of nut in abutting connection with nut on each axle, make at any desirable relative position place of described rail and can avoid a rail to surpass another movement, therefore avoid being wound around the related lifting cord of spool with each and tangle.

Can by the following detailed description with reference to preferred embodiment, in conjunction with figure, and understand more completely other side of the present invention, feature and details from the claim of enclosing.

The accompanying drawing summary

Fig. 1 be with complete extension state illustrate and integrate curtain line tension control system of the present invention top-down/isometric drawing of bottom-up abat vent.

Fig. 2 is the isometric drawing that is similar to Fig. 1, and wherein the head track of abat vent is lowered.

Fig. 3 A is used in first rail in the abat vent of Fig. 1 and Fig. 2 and the exploded isometric view of control system.

Fig. 3 B is the exploded isometric view that the foldable fabric of the abat vent shown in head track and end rail and the Fig. 1 that extends between it and Fig. 2 is shown.

Fig. 4 is the isometric drawing that the assembly of illustrated abat vent in Fig. 3 A and Fig. 3 B is shown, and has wherein removed some parts.

Fig. 5 A is that the abat vent of Fig. 1 and Fig. 2 is positioned in architectural opening and is in the elevation of the complete extended position of Fig. 1, the wherein contiguous first rail of head track, and the bottom of end rail adjacent building opening.

Fig. 5 B is the elevation that is similar to Fig. 5 A, and wherein head track is lowered, keeps simultaneously the bottom of end rail adjacent building opening.

Fig. 5 C is the elevation that is similar to Fig. 5 B, and wherein end rail has been thus lifted to the head track that reduces and has been the closely relation at interval.

Fig. 5 D is the elevation that is similar to Fig. 5 A, and wherein end rail has been promoted abat vent to be placed in complete contraction state fully.

Fig. 6 is the enlarged partial view that the line 6-6 along Fig. 4 obtains.

Fig. 7 be curtain line tension control system of the present invention the top-open type casing assembly overlook isometric drawing, wherein removed some parts.

Fig. 8 is the cross section that the line 8-8 along Fig. 6 obtains.

Fig. 9 is the cross section that the line 9-9 along Fig. 6 obtains.

Figure 10 is the cross section that the line 10-10 along Fig. 6 obtains.

Figure 11 is the cross section that the line 11-11 along Fig. 6 obtains.

Figure 12 looks down the isometric drawing of facing in abutting connection with nut that uses in curtain line tension of the present invention system.

Figure 13 is the backsight isometric drawing in abutting connection with nut of looking down curtain line tension of the present invention system.

Figure 14 is the isometric drawing of bellend of looking down the thread spindle assembly of curtain line tension control system.

Figure 15 is the isometric drawing than small end of looking down the thread spindle of curtain line tension control system.

Figure 16 A is the plan view from above of looking down curtain line tension control system of the present invention, its illustrate in abutting connection with nut when abat vent is settled as shown in Fig. 5 A its will the position.

Figure 16 B be illustrate in abutting connection with nut when being in the state of Fig. 5 B when abat vent its with the plan view from above of the position of adopting.

Figure 16 C is the plan view from above of curtain line tension control system, when wherein adopting abat vent to be in illustrated position in Fig. 5 C in abutting connection with nut its will the position.

Figure 16 D be illustrate in abutting connection with nut adopt when abat vent is in illustrated state in Fig. 5 D its will the plan view from above of position.

Figure 17 A illustrates and integrates the isometric drawing of the second embodiment of telescopic sunshade curtain of the second embodiment of curtain line tension of the present invention system with complete extension state.

Figure 17 B is the amplification isometric drawing that the abat vent of Figure 17 A is shown, and has wherein removed some parts.

Figure 18 is the isometric drawing that is similar to Figure 17 A, and wherein head track is promoted fully, and mid-rail is reduced overburden to be placed in holosystolic position fully.

Figure 19 A is the exploded isometric view of first rail and control system, and described control system is limited in the first rail of illustrated abat vent in Figure 17 A.

Figure 19 B illustrates the upper shade board of abat vent of Figure 17 A and the exploded isometric view of mid-rail, has wherein removed some parts.

Figure 19 C is the exploded isometric view of the mid-rail that the abat vent of Figure 17 A is shown, lower curtain plate and end rail.

Figure 20 is the isometric drawing of the control system of the abat vent that Figure 17 A is shown of head track, mid-rail and the end rail along abat vent, has wherein removed some parts.

Figure 21 A is the elevation that the abat vent of extension fully and Figure 17 A in architectural opening is shown.

Figure 21 B is the elevation that is similar to Figure 21 A, and it illustrates head track and is partly promoted, and mid-rail partly reduces.

Figure 21 C is the elevation of the abat vent of Figure 17 A, and it illustrates head track and is promoted fully, and mid-rail rises to head track and is adjacent relation.

Figure 21 D is the elevation of the abat vent of Figure 17 A, and it illustrates mid-rail and is reduced fully, and head track has been lowered to mid-rail and is neighbouring relations.

Figure 21 E is the elevation of the abat vent of Figure 17 A, and it illustrates head track and is promoted fully, and mid-rail reduces fully.

Figure 22 is the enlarged partial view that the line 22-22 along Figure 20 obtains.

Figure 23 is the elevation of the curtain line tension control module shown in Figure 22.

Figure 24 is the cross section that the line 24-24 along Figure 22 obtains.

Figure 25 is the cross section that the line 25-25 along Figure 22 obtains.

Figure 26 is the cross section that the line 26-26 along Figure 22 obtains.

Figure 27 be the curtain line tension control system shown in Figure 22 the top-open type shell overlook isometric drawing, wherein removed some parts.

Figure 28 is the isometric drawing of looking down the bellend of the thread spindle that uses in the curtain line tension control system shown in Figure 22.

Figure 29 is the isometric drawing than small end of looking down the axle shown in Figure 28.

Figure 30 A is the plan view from above of the curtain line tension control system shown in Figure 22, wherein in abutting connection with nut be positioned at when abat vent is in the position of Figure 21 A its will the position.

Figure 30 B is the plan view from above of the curtain line tension control system of Figure 22, when wherein being positioned at abat vent and being in the position of Figure 21 B in abutting connection with nut its will the position.

Figure 30 C is the plan view from above of the curtain line tension control system shown in Figure 22, when wherein being positioned at abat vent and being in the position of Figure 21 C in abutting connection with nut its will the position.

Figure 30 D is the plan view from above of the curtain line tension control system of Figure 22, wherein in abutting connection with nut when abat vent is in the position of Figure 21 D its with in the position of adopting.

Figure 30 E is the plan view from above of the curtain line tension control system shown in Figure 22, wherein in abutting connection with nut when abat vent is in the position of Figure 21 E its with in the position of adopting.

Figure 31 is the isometric drawing of top-open type shell of the 3rd embodiment of curtain line tension control system of the present invention, has wherein removed some parts.

Figure 32 is the isometric drawing of looking down the bellend of the thread spindle that uses in the curtain line tension control system of the 3rd embodiment.

Figure 33 is similar to the isometric drawing that Figure 32 looks down the opposite end of thread spindle.

Figure 34 is the plan view from above of looking down into the top-open type shell, and wherein a pair of thread spindle is fixed therein.

Figure 35 is the elevation of control system as shown in Figure 34.

Figure 36 is similar to Figure 34 to show the plan view from above in abutting connection with nut that is in syntople.

Figure 37 is similar to Figure 36 to show the plan view from above in abutting connection with nut separated from one another.

Figure 38 is the partial vertical cross section along the line 38-38 of Figure 37 intercepting, its show as the being seen lower shaft of dotted line in Figure 37 in abutting connection with nut.

Figure 39 is the partial vertical cross section along the line 39-39 of Figure 36 intercepting, its show as the being seen lower shaft of dotted line in Figure 36 in abutting connection with nut.

Figure 40 is the enlarged partial view along the line 40-40 intercepting of Figure 39.

The specific embodiment

Fig. 1 to Figure 16 D illustrates architectural opening 42(Fig. 5 A to Fig. 5 D) in use top-down/configuration of bottom-up abat vent 40, wherein abat vent has been integrated the first embodiment 64 according to curtain line tension of the present invention system.As seeing best in Fig. 1 to Fig. 4, top-down/bottom-up abat vent has first rail 46, head track 48, end rail 50, be positioned between head track and end rail and with the collapsible curtain material 52 of head track and the interconnection of end rail, and is used for promoting and reducing independently the control system 54 of head track and end rail.Although the curtain material can be any material that can be laterally folded, but the purpose for present disclosure, it is illustrated as the plate of the honeycomb 56 that comprises a plurality of horizontal-extendings, vertically connects, honeycomb 56 can laterally foldedly make plate to extend fully as illustrated in fig. 1, or shrinks fully as illustrated in fig. 2.The top 58 of plate or curtain material is fixed to the bottom surface of head track with any usual manner along its length, be positioned in the honeycomb of the top and the interior anchor bar 60(Fig. 3 B of passage (mapping) that provides in the soffit of head track is provided as use).Similarly, the honeycomb bottom in plate is attached to the end face of end rail, and wherein anchor bar 62 can insert by honeycomb bottom, and is trapped in passage in end tread face.By this way, head track and end rail leave each other or are unfolded or shrink towards each other the plate that causes respectively the curtain material that relatively moves.

See best in Fig. 3 A and Fig. 4, head track 48 and the end rail 50 of abat vent are raised and reduce, and keep horizontal setting and parallel to each other by control system 54 simultaneously.As understanding in following description, control system comprises two

same components

54A and 54B, and it is contrary in first rail, and one of them assembly 54B promotes and reduces first rail 48, and another 54A promotes and reduction end rail 50.For succinct purpose in detail, a 54A of these assemblies will only be described.Tension control system 64 of the present invention is subjected to sure control system with two assembly 54A and the 54B of the mode integrated control system that will be described below to provide, and its lifting cord 90 of a part that prevents each assembly of formation control system tangles.

With reference to figure 3A, will be described in the control system assembly 54A shown in another assembly left side or top, and can see the driving shaft 68 that it elongation level that comprises non-circular cross sections is settled, it extends to relative end cap 72 from an end cap 70 of first rail substantially.End cap 70 places of on the left side provide drive pulley 74, it has the circumferential channel that is defined by a plurality of clamping teeth 76 that radially extend, and makes the annular that is positioned in passage control cord 78 and can control cord and at any direction rotation drive pulley by turning at a direction or another directional ring.Control cord and have integration pendant line 80 within it, to promote that controlling cord is turned by the ring of system operator.As should be appreciated that, control system assembly 54A has its ring at the left end of first rail 46 and turns and control cord 78, and another control system 58B assembly has it at the right-hand member of first rail and controls cord.

Drive pulley 74 operationally is pivoted in conventional brake device or bidirectional clutch 82, makes when the control cord related with drive pulley 78 not when a direction or another direction pressed on ring turn, and brake makes drive pulley remain on the permanent position.Turned by ring as long as control cord, control the movement of cord on a direction or another direction and discharged brake to allow desirable rotation.An example of this brake can be at United States Patent (USP) the 7th, 571, finds in No. 756, and described case and the application's case belong to the coowner, and the disclosure in it is incorporated herein by reference.

Output at brake 82 provides gear reduction unit 84 to reduce to export rotary speed with respect to input speed.In other words, a complete rotation that is input to gear reduction unit may produce at output 1/3rd or 1/2nd rotation.Depend on curtain material weight and abat vent width that the length by first rail 46 determines, this gear reduction unit may be necessary or may be unnecessary.If utilize gear reduction unit, it can be general type well known in the art so.

The output of gear reduction unit 84 holds the left end of non-circular driving shaft 68, so as to depend on drive pulley 74 the speed of rotation and with predetermined speed of rotation rotating driveshaft.The rotation of driving shaft makes conventional cord be wound around spool 86C rotation, is wound around spool 86C and is arranged on described axle with rotation common with it, and rotatably be positioned at the carriage 88 that is fixed in a usual manner first rail 46.Can find typical winding spool and carriage in No. the 7th, 571,756, aforesaid United States Patent (USP), and at length be disclosed in described case, described case and the application's case belong to the coowner, and the disclosure in it is incorporated herein by reference.Can say for certain, cord is wound around the end of spool grappling lifting cord 90C, and its opposite end support base rail 50 makes the rotation of end rail by spool be raised or when reducing, the curtain-lifting wire-wound spool related with it is wound around or unties from spool.Spool is designed to along with the curtain-lifting wire material around its winding and automatically axially displacedly tangles preventing, but should be appreciated that, if spool excessively be wound around or the certain situation of very few winding under, related variable must the entanglement of lifting cord.Designed just curtain line tension control system of the present invention to reduce the possibility of this entanglement.

The thread spindle element 92 of curtain line tension of the present invention system 64 is on the right of aforementioned winding spool 86C, and is arranged on driving shaft 68 with rotation common with it, and this will be described in more detail below.Can say for certain, the thread spindle element has the longitudinal passage 94 by its non-circular cross sections identical with driving shaft, makes thread spindle and driving shaft as one man rotate.

The second cord that driving shaft 68 supports on the opposite side of curtain line tension system 64 is wound around spool 86E, is wound around spool 86C from aforesaid cord, and it is identical with first that the second cord is wound around spool, and still rotatably be arranged in the carriage 88 that is fixed on first rail 46.Along with lifting cord 90C is wound around spool out from the first cord, the lifting cord 90E related with the second winding spool is connected to end rail.For purposes of the present invention, and as will be described in more detail below, aforesaid to downward-extension and the lifting cord 90C that is fixed to end

rail

50 and 90E respectively with to be wound around

spool

86C and 86E related, to depend on driving shaft 68 and so to realize lifting and the reduction of end rail with the direction of rotation of the winding spool 86C of its operative association and 86E.The right-hand member of the driving shaft as shown in Fig. 3 A makes with any usual manner pivotable in the end cap 72 of first rail 46 right-hand members the ring veer that depends on the control cord 78 related with it, and driving shaft is for bidirectional rotary then in first rail inner support.

With reference to figure 4, being wound around spool 86C and the second cord with the first cord respectively is wound around the related aforementioned lifting cord 90C of

spool

86E and 90E and can sees from its related winding spool and extend through grommet 96 head track 48 downwards, and extend downwardly into subsequently end rail 50, it extends through the first grommet 98 herein, and then upwards return by the second grommet 100, can be tied a knot or additionally provide the attachment of rail on earth at the end of the second grommet 100 places lifting cord.By this way, will see that aforementioned driving shaft 68 will cause end rail be independent of head track and promote or reduce with related winding spool 86C and the rotation of 86E on a direction or another direction.

it does not clearly describe control system assembly 54B(, but shown in Fig. 3 A on the right of aforementioned control system assembly 54A) make its cord be wound around

spool

86B and 86D to support lifting cord 90B from the first and second lifting reels of the second control system assembly to downward-extension and 90D from, and extend through the first grommet 102 in head track, and subsequently upwards by contiguous grommet 104, the end of

cord

90B and 90D can be tied a knot or is fixed in addition head track 48 herein, make the rotation of second assembly (it is independent of the first assembly) of control system will cause head track along with lifting cord 90B is wound around or unties and promote or reduce from its

related spool

86B and 86D respectively with 90D.

From above should be appreciated that, if the operator wants to promote or reduce end rail 50, head track 48 is not moved, the first assembly 54A of control system will operate by the control cord 78 that rotates its association so.The control cord that head track can be similarly turns its association by ring is raised or reduces.By this way, the state that curtain material 52 can limited quantity and being positioned between head track and end rail, wherein four in these states are illustrated in Fig. 5 A to Fig. 5 D.In Fig. 5 A, described curtain extends fully across architectural opening 42, wherein the bottom by end rail being reduced to opening and with head track rise to contiguous abat vent first rail 46 and with its installation.In Fig. 5 B, end rail is left on architectural opening bottom, and head track has been lowered approximately half across described opening.Fig. 5 C illustrates head track and is left on the position shown in Fig. 5 B, but end rail has been thus lifted to head track and is contiguous relation.Fig. 5 D illustrates head track and is positioned at open top, and end rail moves to the relation that is contiguous with it, makes abat vent shrink fully in raised position.

See clearly now curtain line tension of the present invention system, it is provided to prevent that lifting cord 90 from tangling when controlling cord 78 operation, should be appreciated that from description above, each control system assembly 54A and 54B have be arranged on related driving shaft 68 with the assembly of the curtain line tension system of the form of the identical thread spindle 92 of its common rotation.Each thread spindle may see best in Figure 14 and Figure 15 and comprise threaded body 106, its have screw thread one end diameter reduce than small end 108 with in the bellend 110 of the opposite end of screw thread.Longitudinal passage 94 is depicted as the whole length by the thread spindle of non-circular cross sections (relevant to the cross section of driving shaft), so that the common rotation of thread spindle and driving shaft (thread spindle is arranged on driving shaft) to be provided.The bellend of each thread spindle has with the associated end of distance thread spindle integrates a large ring 112 formed thereon than short spacing, and the centre of an integration or the middle part ring 114 isolated distances of small end relatively that are in from described large ring towards thread spindle.Be in from described adapter ring or spaced apart towards the small end relatively of thread spindle with the interior ring 116 of the integration of adapter ring same diameter, wherein for the purpose that will be described below, interior ring is near the tooth or the hook 118 that are formed with radial taper on the face of thread spindle than small end.As seeing best in Fig. 3 A, the bellend 110 of each thread spindle is positioned on its related driving shaft 68, in order to be in the right-hand member as the thread spindle seen in Fig. 3 A.

Each thread spindle 92 has thereon identical in abutting connection with nut 120 of being threaded, and has in abutting connection with nut wherein that screw thread receives on thread spindle to be used for by its threaded pathway 122, and the upper end 124 and the lower end 126 that enlarge.For the purpose that will be described below, provide longitudinal fluting 128 in the soffit of lower end, and hooked scarf body 130 attaches in abutting connection with the face of the bellend 110 of nut surface double thread path 122 tops, so that in the face of the opposite face (being formed with hook 118 on it) of interior ring 116.By this way, ring in the adjacency nut is contiguous and locating when being subjected to prevent that for certain thread spindle is further rotated in one direction, hook can be in abutting connection with described block.

With reference to figure 3A, Fig. 6 and Fig. 7, can see that each thread spindle 92 rotatably is positioned in top-open type shell 132, described shell is connected to first rail 46 in any appropriate manner, in order to can't move with respect to it.The top-open type shell rotatably supports each thread spindle in the opposite end of thread spindle, and wherein carriage 134 is formed at enclosure in the opposite end of shell.Understand best with reference to figure 6 as passing through, thread spindle is vertically settled with small distance each other.At first see the axle 92A of the top as seen in Figure 6 or as the axle on the left side seen in Fig. 3 A, the space or the circumferential groove 136 that define between the large ring 112 of thread spindle and adapter ring 114 have held the guiding finger piece 138 that forms in the shell, with prevent thread spindle significantly vertical shift to the left side, as seen in Figure 6.Form similar finger piece 140 on the wall of shell, to project in the circuferential spacing 142 that defines between adapter ring and interior ring 116, with the longitudinal translation (especially when it rotates) that helps prevent thread spindle.With reference to lower thread spindle 92B as seen in Figure 6, or as the thread spindle on the right seen in Fig. 3 A, the groove 144 interior guiding of its large ring 112 in being provided in the inner surface of shell will be seen, and another finger piece 146 forms in the adjacent wall of shell, it projects in annular space 142 between adapter ring 114 and interior ring 116, and is vertical or axially displaced especially to prevent related thread spindle during the rotation of thread spindle.Can also recognize in Fig. 6, the large ring of lower thread spindle projects in the adapter ring and the gap 142 between interior ring of thread spindle, the sure shaft orientation relation that is subjected to that this has further guaranteed between two thread spindles makes it always to be subjected to for certain relative to each other axial location illustrated desirable precalculated position in Fig. 6.

With reference to figure 9, can see that each is installed on its related thread spindle 92 in abutting connection with nut 120 screw threads, and the longitudinal rib 148 that extends internally by the bottom surface along shell and in shell 132 guiding slidably.Therefore prevented in abutting connection with nut rotation when its related thread spindle rotates.On the contrary, depend on the direction of rotation of axle, nut is along the length translation of thread spindle.Should also be clear that in abutting connection with nut lateral overlap each other with reference to figure 9, make it can't be along the length of its related thread spindle and pass through each other.By this way, when the adjacency nut engages another in abutting connection with nut, be subjected to prevent for certain that thread spindle is further rotated on the direction of adjacency causing.Similarly, in case the block 130 on the face of nut has engaged hook or tooth 118 on the face of interior ring 116, be subjected to so to prevent for certain that each bellend 110 in abutting connection with nut towards thread spindle is further rotated.Even it is may be enough soft allowing nut to some compressions (this will so allow slightly over desirable rotation degree) of interior ring to make the material of nut and axle, described tooth engages with operation between block and also has been to provide the sure measure that is subjected to that prevents that immediately thread spindle is further rotated.

Should be appreciated that, tenslator 64 of the present invention is designed to keep the rotation of double thread axle 92 and driving shaft 68 and therefore to the very accurate of the lifting of lifting cord and its related rail and reduction and be subjected to sure control.This has improved when being wound around or untiing from the winding spool of its association along with the winding spool of its association of curtain-lifting wire-wound the control to the lifting cord, and there is no this sure control that is subjected to, and the entanglement of lifting cord has become problem in the system of prior art.Tangle and usually appear at a removable rail towards another movement, thereby and continue described movement that the removable rail of second is displaced from its position and produce when lax at the lifting cord related with the second rail, this sometimes is wound around spool at its related cord of curtain-lifting wire-wound of association and is wound around part and produces and tangle.

Overlapping due to adjacency nut 120, should be appreciated that, the control system assembly is that operation is relevant, and preferably and suitably locate described in abutting connection with nut by the assembly process at abat vent, can obtain the desirable control of lifting cord is tangled preventing, this is because can prevent that the rail from engaging another rail and another rail is displaced from the position.

For the operation of descriptive system best, Fig. 5 A to Fig. 5 D is relevant to Figure 16 A to Figure 16 D respectively, to be illustrated in as the position in abutting connection with nut 120 of illustrated head track 48 in Fig. 5 A to Fig. 5 D with the relative and corresponding position of end rail 50.Obviously, the relative position of head track and end rail has limited quantity, but for understanding purpose of the present invention, only illustrates four of these positions, and the state of architectural shading curtain 40 therefore.

As mentioned before, as related with end rail 50 in the screw top axle 92A seen in Figure 16 A to Figure 16 D, make its rotation cause end rail to promote or reduce.Seen in Figure 16 A and 16D, bottom thread axle 92B is related with head track 48, and its rotation is relevant to the movement of head track.At first 5A with the aid of pictures and Figure 16 A should be appreciated that, head track is positioned in the extreme higher position of its contiguous first rail 46, and related position in abutting connection with nut is close to the left end of related thread spindle 92B or lower shaft, seen in Figure 16 A.End rail is positioned in the extreme lower position of the bottom of its adjacent building opening, and its association be positioned in the right-hand member of its related thread spindle 92A or upper thread spindle in abutting connection with nut, seen in Figure 16 A.Thereby, forever can't be positioned at the more left side that presents than it in abutting connection with nut in Figure 16 A down because head track is at its highest point that can go, and due to end rail at its lowest part that may go, related with end rail in abutting connection with nut at its rightmost that can go.

Follow 5B with the aid of pictures and Figure 16 B, should be appreciated that, end rail 50 is still in its extreme lower position, makes related with it top nut seen in nut 120(such as Figure 16 B) also not mobile, and be in the right-hand member of its thread spindle 92A or upper thread spindle, seen in Figure 16 B.Yet upper rail 48 has been lowered, and along with it is lowered, its association moved to the right in abutting connection with nut (nut on lower thread spindle is seen in Figure 16 B).

Follow 5C with the aid of pictures and Figure 16 C, upper rail 48 remains in the position at its place in Fig. 5 B, and thereby as seen in Figure 16 C, its correspondence on lower thread spindle 92B in abutting connection with nut 120 with its same position place occupied in Figure 16 B.Yet end rail 50 has been raised, and along with it is raised, seen in Figure 16 C, its association on top axle 92A moved to the left side in abutting connection with nut, and in fact in abutting connection with time in abutting connection with nut, make on described direction and can not be further rotated.Certainly, this has provided any thread spindle and stopped by sure rotation, this will cause its association in abutting connection with nut towards being moved further each other, therefore and also stopped for certain the rotation that associated cord is wound around spool, this has prevented may tangling of being moved further of arbitrary rail and the lifting cord related with it.By suitably being positioned on its related thread spindle in abutting connection with nut, where no matter go up rail and lower rail is positioned in architectural opening itself, or can control spacing between rail and lower rail, and it is can't ratio as more approaching in illustrated preset space length in Fig. 5 C and Fig. 5 D.

With reference to figure 5D and Figure 16 D, should be appreciated that, upper rail 48 has been thus lifted to the top of opening 42, make its association in abutting connection with nut 120(on lower shaft 92B, seen in Figure 16 D) moved to its position occupied in Figure 16 A, and simultaneously as seen in Figure 16 D, be thus lifted to the desirable near the interval of end rail and head track with upper in abutting connection with the related end rail 50 of nut 120, this appears at when being engaged with each other in abutting connection with nut as previously mentioned certainly.As mentioned before, provide in abutting connection with the adjacency of nut and be subjected to very much certainly and the system of sudden change, to prevent that related driving shaft is further rotated, make the further compression of having avoided the fabric between upper rail and lower rail and worse rail from the position mobile opening inadvisablely, and therefore avoided the possible entanglement of lifting cord.

From above should be appreciated that, the system that utilizes is of use not only in upper rail and the lower rail that promotes and reduce top-down/bottom-up abat vent between infinite variable position, and by the described curtain line tension of use system, provide to be subjected to very much certainly and instant system, with the worthless movement that prevents to cause tangling and therefore causing the rail of abat vent fault.

Then referring to figs. 17A through Figure 30 E, illustrate the second embodiment 152 with curtain line tension control system top-down/the second configuration 150 of bottom-up abat vent.Yet, should be appreciated that from following description, control system 154 comprises

assembly

154A and 154B, even but its curtain line tension control section 152 and aforesaid curtain line tension control section something in common are that two different

compressible sheet

156 and 158 of removable rail and curtain material are related, still only have two rails removable in abat vent.

17A to Figure 18 with the aid of pictures can see that this configuration 150 of top-down/bottom-up abat vent comprises and configures described first rail identical first rail 46, the top plate 156 of collapsible curtain material and the bottom plate 158 of collapsible curtain material in conjunction with first.The top plate 156 of curtain material hangs its honeycomb topmost in a usual manner from first rail 46, as with anchor bar (mapping), and by using the anchor bar, its bottom margin is connected to head track 160 by the honeycomb bottom of top plate.The top honeycomb of bottom plate 158 is still used anchor bar (mapping) or is connected to the soffit of mid-rail 162 by any other suitable system, wherein the bottom of bottom plate or bottom honeycomb be connected in a similar fashion to end rail 164.The end rail of this configuration of abat vent is fixed to extreme 166(Figure 21 A to Figure 21 E of the framework of architectural opening 42), so it can't move.Similarly, first rail is installed on suitable support (not mapping), so it can't move.Yet head track 160 and mid-rail 162 can be by in conjunction with the first configuration control system 154A of described type of Fig. 1 to Figure 16 D or 154B and relative to each other and be independent of and move up and down each other, except curtain line tension system 152 is its second embodiments.

With reference to figure 17A, abat vent 152 is extended fully, and wherein top plate 156 is extended fully, and bottom plate 158 extends fully, and in this position, head track 160 is adjacent with mid-rail 162.Figure 18 illustrates head track and is raised, and upper plate being retracted to the folding position of contiguous first rail 46, and mid-rail has been lowered lower plate to be folded into the punctured position of rail of the contiguous end 164.Figure 17 B illustrates the enlarged drawing of abat vent in the position of Figure 17 A, wherein due to size restrictions, has removed some parts.

Follow 19A to Figure 20 with the aid of pictures, should be appreciated that, as mentioned above, for operating described abat vent, utilize to have two identical but the control system assembly 154A of contrary and the first rails 46 of 154B.The control system assembly of this configuration and the configuration of Fig. 1 to Figure 16 D unique different are the different curtain line tension 152(of system, and this will be described below), and static fixed guide cord 168(Figure 19 A, Figure 19 B and Figure 20) anchor station from first rail 46 extends to end rail 164 with the fact of the movement of guiding head track 160 and mid-rail 162 in the operation of abat vent.In this configuration of abat vent, shown in Figure 19 A another assembly 154B left side with above control system assembly 154A have related with its winding

spool

172C and 172F respectively lifting

cord

170C and 170F, wherein

cord

170C and 170F be to downward-extension, and make its lower end anchor to mid-rail 162(Figure 20 in the mode that is similar to the mode described in the present invention's the first configuration).

Illustrated in Figure 19 A, the lifting cord 170B related with another control system assembly or lower

control system assembly

154B and 170E be to downward-extension, and or in the mode identical with the present invention's the first described mode of configuration and anchor to head track.Thereby seen in Figure 19 A, the operation of upper control system assembly or left side control system assembly 154A promotes or has reduced mid-rail 162, simultaneously as seen in Figure 19 A, and the operation of lower assembly or the right assembly 154B lifting or reduced head track 160.Can understand, each is independent of head track and mid-rail each other and vertical mobile, and therefore can be positioned in any desirable position in architectural opening in the operating parameter of curtain line tension system 152.Yet, with this configuration of abat vent, the location of head track no matter, the upper plate section will always extend to head track from first rail, and the location of mid-rail no matter, and lower curtain component will always extend to mid-rail from end rail.

Then with reference to Figure 22 to Figure 29, curtain line tension control system 152 will be described.The curtain line tension control system of this embodiment of the present invention still comprise two identical thread spindles 174 and two identical in abutting connection with nut 120, it is identical with the parts shown in aforesaid and Figure 13 and Figure 14.As seeing best in Figure 28 and Figure 29, thread spindle has the screw thread body part 178 of elongation, smaller diameter end 180 and larger diameter end 182, has the longitudinal extension path 184 by the non-circular cross sections of thread spindle, driving shaft cross section with the control system assembly that it is related is relevant to it, makes thread spindle as one man rotate with related driving shaft 68.The larger diameter end of thread spindle has the outer shroud 186 of the first diameter formed thereon, and its adapter ring 188 from same diameter is spaced apart, to define circumferential channel 190 between it.Adapter ring is then spaced apart from larger diameter ring 192, forms another circumferential channel 194 between it, wherein the larger diameter ring have formed thereon in the face of thread spindle than the taper of small end 180 radially hook or tooth 196.Each has aligned tabs formed thereon 198 first ring and adapter ring, and it is not except promoting with relation desirable between driving shaft and thread spindle the operating function being assembled in thread spindle on driving shaft.

As mentioned curtain line tension control system 152 also be included on each thread spindle in abutting connection with nut 120, wherein as mentioned before, described described identical in abutting connection with nut with the first embodiment in conjunction with the curtain line tension control system in abutting connection with nut.Illustrate best in Figure 27, and illustrate with the operative relationship with

thread spindle

174A and 174B in Figure 24 to Figure 26, thread spindle rotatably supports in top-open type shell 200.Yet as seen in Figure 22, should be appreciated that, thread spindle is similar to described the first embodiment and vertical misalignment each other, and the opposite end of thread spindle rotatably is contained in carriage 202, and it is subjected to for certain thread spindle to be located with respect to shell.Certainly, shell is positioned in first rail 46 in any appropriate manner regularly.

At first with reference to upper thread spindle 174A, as seen in Figure 22, and with reference to Figure 24 to Figure 27, should be appreciated that, shell 200 has the setting finger piece 204 that is formed on diapire, it is adjusted to extend in outer shroud 186 and the gap between adapter ring 188 on thread spindle, is displaced to the left side to prevent upper thread spindle.Montant 206 is formed on the side wall of outer shell of the adapter ring of thread spindle on direct vicinity, wherein montant has the bias spring 208 that is mounted thereon, an arm 210 of its medi-spring extends through the hole 212 in side wall of outer shell, and be anchored in hole 212, and the opposite end of spring has engaged large ring 192 in the face of the surface of adapter ring.Therefore spring 208 is biased to the left side with thread spindle, as seen in Figure 22, outer shroud is held against adjacent fingers 204, to guarantee that axle is with respect to shell and the therefore desirable location of first rail itself.

See lower thread spindle 174B, as seen in Figure 22, and Figure 24 to 27, will see that another adjacent fingers 214 is provided in the diapire of shell, and locate in the face of the face of adapter ring 188 in abutting connection with large ring 192.This adjacent fingers prevents that lower thread spindle is displaced to the right.Lower thread spindle is biased to the right, wherein the second spring 216 is arranged on the second montant 218 on the opposing sidewalls of shell, wherein said spring is identical with the first spring, have the hole 220 that extends through in sidewall and be anchored at a finger piece in hole 220, and the relative arm 222 of spring has engaged the face of outer shroud 186 in the face of adapter ring, in order to lower thread spindle is biased to the right, and enter the sure adjacency that is subjected to adjacent fingers 214.Found that the spring bias system is desirable for being subjected to for certain thread spindle to be located with respect to shell, though make during the thread spindle rotation also not mobile and be mounted thereon in abutting connection with nut translation therefore.

Follow 21A to Figure 21 E with the aid of pictures, it illustrates five diverse locations of abat vent, with and relevant respectively at the view of the curtain line tension control system 152 shown in Figure 30 A to Figure 30 E, can understand the curtain line tension control system how to be provided for controlling thread spindle 68 and winding spool 172 therefore rotation be subjected to sure system, tangle to prevent the lifting cord related with being wound around spool 170.

At first 21A with the aid of pictures will see head track 160 approximate location in the centre of architectural opening 42, and the mid-rail 162 that wherein is adjacent the location is also at the approximate center of architectural opening.Seen in Figure 30 A, on upper axle 174A in abutting connection with the approximate longitudinal center of nut 176 at the thread spindle of association, and with lower thread spindle 174B in abutting connection with the nut adjacency, described in abutting connection with nut also in the approximate longitudinal center of its thread spindle.As shown in Figure 21 A, just when

rail

160 and 162 in abutting connection with the time, in abutting connection with nut also by in abutting connection with being desirable, with prevent the operator attempt with upper rail or mid-rail up the opposite side of rail or mid-rail more than preferably moving (this can cause the lifting cord related with being wound around spool to tangle).Thereby as seen in Figure 30 A, nut prevented for certain that to accepting rail is moved beyond its adjacency, as shown in Figure 21 A.

In Figure 21 B, upper rail 160 has been raised than short distance, and mid-rail 162 has been lowered by the distance of shortening, and this causes being displaced to the right in abutting connection with nut 176, and is displaced to the left side in abutting connection with nut down, enters independent position.

With reference to figure 21C, head track 160 has been thus lifted to the first rail 46 near abat vent, make lower to nut shown in its related nut 176(Figure 30 C) near the left end of thread spindle 174B, and mid-rail 162 has been thus lifted to and the head track adjacency, make in abutting connection with nut and still be engaged, because rail is not desirable towards being moved further each other, because it may cause the lifting cord to tangle.Certainly, be subjected to prevent for certain any being moved further in abutting connection with the adjacency of nut, and therefore prevent from tangling.

21D with the aid of pictures, mid-rail 162 has been lowered to quite near end rail 164, and head track 160 has been lowered by with mid-rail and is in abutting connection with neighbouring relations.Explanation again is although the nut 176 on its associated shaft has been displaced to the right, because head track and mid-rail are lowered, so nut 176 is just as head track and the such adjacency of mid-rail, to be subjected to preventing for certain rail court any being moved further each other.As mentioned above, this has prevented the possibility that the lifting cord tangles.

With reference to figure 21E, head track 160 has been thus lifted to contiguous first rail 46, and mid-rail 162 has been lowered to rail of the contiguous end 164, makes seen in the nut 176(such as Figure 30 E related with rail) determine and separate by the location of head track and mid-rail.

Thereby should be appreciated that, this embodiment with curtain line tension control system 152, by preventing that head track and mid-rail are towards further moving than desirable each other, the possibility that the lifting cord related with the winding spool on driving shaft 68 tangles is lowered, because a known rail can cause the lifting cord to tangle towards another compression movement, especially a moving rail shifts out the removable rail of second from the position, produces when relaxing on the lifting cord related with the removable rail of second.In addition in this embodiment, thread spindle is located for certain in order to be not subjected to its rotation or affect in abutting connection with the adjacency of nut by spring bias system (it is held against thread spindle the fixed fingers that is formed in shell).

Figure 31 to Figure 40 shows the 3rd embodiment according to curtain line tension control system of the present invention, wherein the present embodiment of curtain line tension control system can be applicable to previous described top-down/any of bottom-up abat vent configuration be combined with.In other words, the 3rd embodiment of curtain line tension control system will and be worked together with the configuration that has single collapsible plate between end rail at removable head track, perhaps exist two collapsible plates configuration in work, wherein collapsible upper plate extends to removable head track from fixing first rail, and base plate rail from removable moves to fixedly end rail.As in embodiment as described in first the first two of curtain line tension control system, the 3rd embodiment comprises the top-open type shell 240 that hereinafter will describe in detail, wherein two identical thread spindles 242 rotatably are positioned at wherein and are used for one of removable rail of abat vent by slotting key to associated drives axle 244, and wherein each thread spindle has screw thread adjacency or adjusting nut 246 thereon, and the nut of its overlapping adjacent threads axle is adjacent to each other when making one of described nut removable rail in abat vent not need to be moved further.

At first with reference to Figure 32 and Figure 33, illustrate the thread spindle 242 that uses in the 3rd embodiment, and visible described thread spindle 242 has thread segment 248 along quill shaft 250, wherein said quill shaft has the passage 252 of non-circular cross sections therein with related with the cross section of driving shaft 244, makes thread spindle and as one man rotates as the driving shaft in embodiment as described in first the first two.At the larger end of described thread spindle, outer shroud 254 and interior ring 256 are configured to have same diameter and spaced apart in order to define betwixt circumferential groove 258.Outer shroud has the radial teeth 260 of opening from interior ring extension on its outside, wherein said tooth defines the flat composition surface 262 that extends in the axial direction, and interior ring has the identical adjacent teeth 264 of avoiding outer shroud on its inside spigot surface simultaneously.Can see best as Figure 34, Figure 36 and Figure 37, thread spindle is adjusted to be used for fixing in the top-open type shell 240 of Figure 31, make described thread spindle extend in an opposite direction, that is, the larger end of axle (as the upper axle seen in Figure 34, Figure 36 and Figure 37) be in the right-hand member of shell and be in as the larger end of Figure 34, Figure 36 and the being seen lower thread spindle of Figure 37 as described in the left end of shell.Shell has suitable carriage 266 and carriage 268 rotatably to support the associated end of thread spindle at the place, opposite end, make described thread spindle to rotate in carriage and along with the rotation of described thread spindle, the length translation association of the thread spindle in the embodiment as discussed previously in abutting connection with nut 246.But rail 270 on the diapire 272 of shell prevents nut with respect to the shell rotation allows described nut along the length translation of thread spindle by the related thread spindle of related driving shaft rotation the time.

Can understand best as reference Figure 31, have the end of shell 240 that carriage 266 supports the larger end of thread spindles 242 and have the rib 274 of horizontal expansion, described horizontal expansion rib 274 has from the upwards projection and outwards separate or towards the rectangular cross section of the approach end of shell of the diapire 272 of shell, and vertical the extension in abutting connection with tab 276 is oriented to radial teeth 260 on the outer shroud 254 as will be described below.What cross rib 274 was inside is roughly that Z-shaped spring arm 278(can be metal or plastic cement), it has as for example Figure 38 and Figure 39 finding and is anchored into foot 280 under the level of shell, vertically extending middle foot 282 and extend upper foot 284 towards the opposite end of shell from the end of lower foot in the centre position.The opposing that the free edge 286 of upper foot is oriented to engage the interior ring 256 of related thread spindle and produce axle on the direction of the end of the larger end of support thread spindle in shell is moved.

With reference to Figure 36, be depicted as in abutting connection with nut 246 and be adjacent to each other, this will be the movable axle related with each thread spindle 242 situation when relative to each other close positioning and being in does not wish that they do any position that is moved further toward each other.Figure 34 show that rail as removable in association separates when separated from one another in abutting connection with nut, and Figure 37 show further separate in abutting connection with nut, and wherein with the adjacency in abutting connection with the interior ring 256 of nut thread spindle related with it of the tops of two removable rails related end thread spindle (as seen in Figure 37), and radial rib 288 adjacency on the nut that engage with radial teeth 264 with interior ring will cause it in abutting connection with nut being further rotated on the direction that interior ring moves to prevent any thread spindle.

With reference to Figure 38 and Figure 39, illustrate spring arm 278 and cross rib 274 and in abutting connection with the operation of tab 276.In other words, Figure 38 and Figure 39 are the cross sections by the upper thread spindle 242 seen in Figure 34, Figure 36 and Figure 37, and bottom of two removable rails in its thread spindle and abat vent is related.If causing on the direction that moves to the left side in abutting connection with nut 246 as Figure 38 and Figure 39 finding on thread spindle, rotates the control cord of removable lower rail, if perhaps the lower thread spindle rotation related with the most last removable rail in abat vent makes it be moved to as shown in figure 39 the right in abutting connection with nut, engage as nut will finally become as shown in figure 39 so.When this occurs, as shown in figure 39, to promote its related thread spindle towards its larger end of resisting the biasing of related spring arm 278 in an opposite direction by beginning in abutting connection with nut reacts, this allow thread spindle translation on the direction of its larger end a little, until the outer engagement of loops on thread spindle or engage substantially association in shell in abutting connection with tab 276, described tab 276 is then aimed at the radial engagement tooth 260 on outer shroud, as shown in Figure 39.Certainly, this can positioning threads axle, so rotate on the direction of the movement of its related rail that it can't be in causing its association therefore translation stops abat vent toward each other in abutting connection with nut.

Therefore; should be appreciated that; it is mobile that the curtain line tension control system of the 3rd embodiment allows removable rail to begin towards producing each other; but Once you begin produce mobilely, will there be very positive obstruction in rail owing to the correlation of relevant radial teeth 260 on tab 276 in described curtain line tension control system towards the movement of another rail.

According to above, should be appreciated that, in two different configurations and utilize and resist the lifting cord and tangle and show top-down/bottom-up abat vent in its three different embodiments that are wound around the curtain line tension control system on spool.By with on thread spindle in abutting connection with nut to be wound around spool and related lifting cord relevant to prevent that rail from having prevented entanglement towards excessively mobile each other, found this excessive mobile possibility that can the entanglement of increase lifting cord.

Although described the present invention with particularity to a certain degree, it should be understood that, present disclosure is to carry out by way of example, and in the situation that less than the spirit of the present invention that defines in breaking away from the claim of enclosing, can carry out detailed or structural variation.

Claims

One kind be used for architectural opening top-down/bottom-up abat vent, it comprises following combination:

First rail;

Article at least two, horizontal setting, vertically moving rail, it supports at least one plate of collapsible curtain material;

Attach at least two flexible lifting cords of every rail;

With the every control system assembly that rail is related, each assembly comprises: the driving shaft of elongation; Be used for described driving shaft around its longitudinal axis system of rotation back and forth and reversibly; Be wound around spool, it can and be connected to the lifting cord with described driving shaft rotation and make described lifting cord to be wound around or to untie from described winding spool around described winding spool, the vertical movement of described rail is subjected to the winding of the described spool of described curtain-lifting wire-wound and the impact of untiing, and

The curtain line tension control system, it is used for preventing that described lifting cord from becoming tangles at described winding spool place, described curtain line tension control system comprises: and the thread spindle that can with each driving shaft as one man rotate related with each driving shaft; Be threadedly connected to the nut to move along the axle translation of association on each of described thread spindle, described nut on described thread spindle is along the thread spindle of association and overlapping on its travel path, accordingly when described nut engages with contiguous nut, described driving shaft will be under an embargo and rotate in a predetermined direction, thereby forbid the described winding spool rotation on described driving shaft;

Described curtain line tension control system also comprises shell, wherein said thread spindle is rotatably installed in described shell, fixedly abutment in described shell engages with described thread spindle, to prevent moving axially of described axle scheduled volume in a predetermined direction, and the elastic component in described shell is setovered each of described axle against described fixedly abutment, described shell also has sidewall and diapire, and wherein said elastic component is installed on described diapire.
2. abat vent according to claim 1, wherein said thread spindle comprises the projection that engages for described fixedly abutment.
3. abat vent according to claim 2, wherein said projection is the radially extended loop of axially spaced-apart.
4. abat vent according to claim 1, wherein said fixedly abutment is on described diapire.
5., wherein there are at least two described rings in abat vent according to claim 3.
6. abat vent according to claim 5, at least one in wherein said fixedly abutment are positioned between in described ring two.
7. abat vent according to claim 3, at least one in wherein said ring comprises radial teeth, described radial teeth is used for engaging to prevent with fixing abutment the rotation of described thread spindle.
8. abat vent according to claim 3, at least one in wherein said ring comprises radial teeth, described radial teeth be used for described related thread spindle on described nut engage.