TW200839081A - Spring motor and drag brake for drive for coverings for architectural openings - Google Patents

Abstract

A spring motor and drag brake for use in coverings for architectural openings.

Description

200839081 IX. Description of the Invention: [Technical Field] The present invention relates to a spring motor and a drag brake that can be used to open and close or tilt a mortise opening cover, such as a blind, a pleated shade. , vertical curtains, other expandable materials and other mechanical devices. [First as technology] Throughout the system, the blind transport system will have a slab cover and a head rail that obscures the mechanism for raising and lowering or opening and closing the hood. This blind system is described in U.S. Patent No. 6,536,503 "Modular Transp〇rt

System f0r Coverings f〇r 八池咖 (4) "Μ喂", the case is hereby incorporated by reference. In a typical top-down product, it is suspended by self-sustaining and attached to Lifting ropes for sill rails (also known as moving guides or bottom slats) to raise and lower the covering. Opening and closing of the covering is usually done by stacking the front and back trapezoidal straps (4) or diagonally along the slats. The illusion is achieved. The hoisting rope usually travels along the through holes in the front and back of the slat pile f or in the slats. In these types = 盍 ' 'When it is completely lowered (fully extended), the hoisting cover Matter: The force is the smallest, because the weight of the slats is supported by the trapezoidal belt, so that one: bottom 'two: the bottom guide I is further raised due to the cover, the slats are stacked so that the weight of the slats is transferred from the trapezoidal belt To lift, rope, cover close to fully raised (fully retracted) position requires a large lift to raise the cover. - Some window covering products are built in the opposite direction (bottom up), which moves 126756. Doc 200839081 moving rails in Asia and Africa in the window covering the bundle But at the top of the window covering bundle between the beam and the head guide, such that the bundle is usually concealed at the bottom of the window when the covering is retracted and the moving rail is at the top of the window covering The ram is accumulated near the head guide. There are also composite products that can be pulled from top to bottom and/or bottom-up. In horizontal window covering products, there is external gravity, and the operator resists the external gravity. Move the expandable material from one of its extended and retracted positions to the other. 々Compared with the blind, in the top-down curtain (such as the horizontal shade of the knife) The blocking material flux f is wound around the rotor rail as the curtain rises. Therefore, the weight of the curtain is transferred to the rotor guide 2 as the curtain is raised, and the force required for the curtain is thus accompanied by the curtain (Light blocking element) gradually decreases as it approaches the full-lift (fully open) position. Of course, there are also bottom-up curtains and composite curtains that can be pulled from top to bottom and/or bottom-up. In the case of a bottom-up curtain, the curtain The weight is transferred to the rotor guide as the curtain is lowered, emulating the weight-operating style of the top-down shade. In the case of vertically oriented window coverings that move left and right instead of moving up and down, they are usually used. a first rope to pull the cover to the retracted position, and then a second rope (or second end of the first rope) is used to pull the cover to the extended position. In this case, the operator does not resist heavy h " "The window coverings may also be configured to have another external force or load than gravity, such as spring force, which the operator will resist to move the expandable material from one position to another. 126756.doc 200839081 A wide variety of drive mechanisms for extending and retracting the covering - moving the covering or tilting the slat vertically or horizontally are known. A plurality of such drive mechanisms may use a spring-loaded motor to provide catalytic force (and/or supplement the catalytic force supplied by the operator) to move the cover. Embodiments FIGS. 1 to 20 illustrate various embodiments of a spring motor. These spring motors can be used to extend and retract window coverings by raising and lowering window coverings, moving window coverings left and right, or opening and closing their slats obliquely. Window coverings or coverings for building openings are also more specifically referred to herein as blinds or curtains. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partially exploded perspective view of a first embodiment of a honeycomb curtain 1 利用 2 using a spring motor and a drag brake assembly 1 〇 2 . The curtain 100 of FIG. 1 includes a head guide 1〇8, a bottom guide 11〇, and a honeycomb curtain structure 2, the honeycomb curtain structure 112 is suspended from the head rails 1〇8 and attached to the head guide 108. And the bottom guide 110. The covering material 112 has substantially the same width as the length of the head guide 108 and the lifting bar 118, and has a hoisting rope when fully extended (not shown in this view but shown in Figure 6A). The heights are substantially the same height, the hoisting ropes are attached to the bottom guide 11 〇 and attached to the lifting table i 6 such that when the lifting bar 118 rotates, the lifting reel on the lifting table 6 also rotates, and the sling rope is wound around The lift table 116 is unfastened or lifted from the lift table 116 to raise or lower the bottom guide 11 and thus raise or lower the curtain 100. These lifting stations 116 and their operating principles are disclosed in the US Patent Case No. 6,536,503 issued March 25, 2003. Modular Transport System for Coverings for 126756.doc 200839081

In Architectural Openings 11, the case is hereby incorporated by reference. End cap 120 encloses the end of head guide 108 and can be used to mount honeycomb product 100 to a building opening. The bouncing motor and the towed brake assembly 102' disposed between the two lifting platforms 116 are functionally interconnected to the lifting platform via the lifting bars 118!丨6, let us know in more detail below. When the spring motor rotates, the reel 118 and the reel on the lifting table π 6 also rotate and vice versa. The use of a magazine motor to raise the surface and lower the curtain is also disclosed in the aforementioned US Patent No. 5 36 503 "Modular Transport System for Coverings for Architectural Openings." To raise the curtain, the user lifts the bottom rail 110. The magazine motor The auxiliary user raises the curtain. At the same time, the drag portion of the spring motor and the drag brake combination 1〇2 exerts resistance to this upward movement of the curtain. As explained below, the drag brake applies two different torques to resist rotation, Depending on the direction of rotation, as explained in more detail below, in this embodiment, the resistance to the upward motion applied by the drag brake is the smaller of the two torques (referred to as the release torque). This release torque, along with the system friction and the torque attributed to the weight of the curtain, is sufficiently large to prevent the spring motor from slamming the curtain up once the curtain 1 is released by the user. To reduce the curtain, the user Pulling down the bottom guide 11G, the gravity assists the user to perform this task. When the bottom rail 1 下拉 is pulled down, the magazine motor rotates to increase The potential energy of the leaf spring (as explained in more detail below, the sheet spring of the stirrup is wound onto its output reel 122). As explained in more detail below, the drag portion of the combination (10) is directed to the curtain 126756 .doc 200839081 The lower movement exerts resistance, and this resistance is the larger of the two torques applied by the drag brake (called the holding torque). This holding torque combined with the torque applied by the spring motor and the system friction is large enough to prevent the curtain Curtain 1〇() falls. Therefore, the curtain is kept in its position released by the operator, regardless of where the curtain is released along the entire range of the curtain; it is neither upwardly moved when released. Referring now to Figure 2, the spring motor and drag brake assembly 1 2 includes a motor output spool 122, a leaf spring 124 (also referred to as motor spring 124), a stepped coil spring 126, and a motor housing. The portion 128 and a brake outer casing portion 13 are. The two outer casing portions 128, 130 are joined together to form a complete outer casing. In the embodiment, the brake outer casing portion 13 extends out of the brakes. The motor output spool 122 (see also FIG. 5) includes a spring take-up portion 132 at the flank of the inclined left shoulder 134 and the right shoulder 136, respectively, and defines a An axially oriented flat recess 138 includes a raised button 140 (see FIG. 5) for securing the first end 142 of the leaf spring 124 to the motor output spool 122. The first end 142 of the spring 124 is threaded into the flat recess 138 of the spring take-up portion 132 until the raised button 14 of the spring take-up portion 132 snaps through the opening 144 at the first end 142 of the leaf spring 124. Thus, the leaf spring 124 is releasably fastened to the motor output spool 122. Motor output spool 122 further includes a drag brake drum portion 146 that extends axially to the right of right shoulder 136. As will be described later, the stub shafts 148, 150 extend axially from each end of the motor output spool 122 for 126756.doc • 10 - 200839081 to rotatably support the motor output spool 122. The leaf spring 124 is a flat metal strip that is itself tightly wound as depicted in FIG. As noted above, the first end 142 of the spring 124 defines a through-port 144 for releasably securing the leaf spring 124 to the motor output spool 122. As seen from the advantages of FIG. 2, the path of the leaf spring 124 is selected such that the end 142 of the leaf spring 124 is below the motor output spool 122 and into the flat recess 138 until the button 140 snaps to the leaf spring 124. It passes through the opening 144. ,

Referring now to the coil spring 126' which resembles a conventional coil spring, it defines two different coil diameters. (Note that the tape roll diameter is only one of the tape rolls. Another feature is its wire diameter or wire cross-sectional dimension.) The first tape roll portion 15 2 has a smaller tape roll diameter and defines a just slightly smaller drag. The inner diameter of the outer diameter of the brake drum 146. As described in more detail below, the second coil portion 154 has a larger coil diameter and defines a corresponding cavity 156 (also referred to as housing aperture 156 or drag wheel 156) that is just slightly larger than the brake housing 130. The outer diameter of the inner diameter. The brake housing portion 130 defines a cylindrical cavity 156 (also referred to as the drag brake housing bore 156 as previously indicated) that is just slightly smaller in diameter than the second coil portion 154 of the stepper coil spring 26 Outer diameter. The brake outer casing cutter 130 has an inner hollow shaft projection 158 that is similar to one of the motor housing portions 128 and that matches the inner hollow shaft projection 160 (see FIG. 5). A spool 162 is defined that defines a through opening 164 that extends through the outer casing portions 128, 13A. As explained later, this through opening 164 can be used as a rod (such as a lifting rod or a diagonal rod) 126756.doc • 11 · 200839081 By position, 'allows two independent drives n to be connected to each other in parallel directions

Almost embedded in the dragging drum portion 146, and a belt roll portion 152 is shown and similarly shown as being embedded in the dragline hole 56. In fact, the coil portions 152, 154 are not actually post-into their respective portions 146, 156, and are shown in this manner to indicate the coil portions 152, 154 and their respective drums and housing apertures 156. There is a fact of interference coordination. The amount of the fit and the line diameter or line cross-sectional dimension of the stepped disk 126 indicate the release torque that must be overcome in order to rotate the brake drum 146 relative to the outer casing 130 in a first direction and a second direction, respectively. And holding torque. These two torques may also be referred to as component torque because it is the torque applied by the drag brake assembly or the torque applied to the drag brake assembly as opposed to the system torque, which is exhibited by the system as a whole. Torque and it may also include torque due to the spring motor portion of the combination 102, friction torque, torque due to the weight of the curtain, and the like. The coil spring 126 applies a torque that resists both the brake drum 146 and the bore 156 of the outer casing 130, and these torques resist rotation of the brake drum 146 relative to the outer casing 130 in a clockwise and counterclockwise direction. The amount of torque applied by the coil spring 126 against the brake drum 146 and the hole 156 varies depending on the direction in which the brake drum 146 rotates relative to the casing 13 and the position at which the slip occurs changes depending on the direction of rotation. To facilitate this description, the coil spring torque that must be overcome in order to rotate the brake drum relative to the housing in one direction will be referred to as the holding torque and must be overcome with 126756.doc -12-200839081 to cause the brake drum to be in the other direction. The coil spring torque that rotates relative to the outer casing will be referred to as the release torque. When the take-up spool and the brake drum rotate in a counterclockwise direction relative to the outer casing 13 (as seen from the vantage point of Figure 2), a holding torque occurs which tends to move the coil spring 126 away from the drum portion 146 and toward the outer casing 13 The hole 156 of the cymbal expands or expands. In this case, the dragging drum portion 146 is slid through the first coil portion 152 of the coil spring 126, and the second coil portion 154 of the coil spring 126 is locked to the housing hole 156. This holding torque is the higher of the two component torques of the drag brake assembly, and in this embodiment the leaf spring 124 is wound on the output spool 122 (and unwound from the storage spool 162, adding device 1) When the potential energy of 〇2 occurs, it is also when the user pulls down the curtain 100 with the aid of gravity. Therefore, when the user pulls down the bottom rail 11 () to overcome the holding torque, the leaf spring 124 is wound around the output spool, and the drum 146 is slid relative to the coil spring 126. The holding torque is designed to prevent the curtain 1 from falling when the curtain 1 is released at any point along the travel distance of the curtain ι 2 . (Of course, this configuration can be reversed such that a counterclockwise rotation occurs when the user lifts the bottom guide). Similarly, when the bottom rail 110 of the curtain 100 is raised, the output spool 122 and the brake drum 146 rotate in a clockwise direction relative to the aperture 156 of the housing 13 (as seen in Figure 2). The sheet magazine 124 is wound on the storage reel 162 and unwound from the output reel 132 to assist the user in raising the curtain. Also, the stepped disc 126 is rotated in the same clockwise direction so that the coil spring 丄% is tightened away from the housing bore 156 and toward the drum 146. This causes the first reel portion 152 to clamp 126756.doc -13 - 200839081 tightly on the dragging drum portion 146 and to contract the second reel portion 154 away from the aperture 156. When the stepper coil spring 126 slips relative to the housing aperture ι 56, the release torque (the lower of the two torques of the drag brake assembly) occurs. Therefore, when the operator lifts the bottom guide 110, the leaf spring 124 is rolled up on the storage reel 162, and as the curtain is raised, the coil spring slides relative to the hole 156. The total holding torque is the larger of the two torques of the drag assembly and it occurs as the disk yellow 126 grows or expands such that the second coil portion 154 expands against the aperture 156 of the outer casing 130 and "Lock" on the bore 156 of the outer casing 13 and the first coil portion 152 extends from the dragging drum portion 146 and slides relative to the dragging drum portion 146. The release torque is the lesser of the two torques of the towing brake assembly, and it is deflated on the day of the drag brake spring 126, causing the second coil portion 1 54 to be tightened away from the aperture 156 of the housing 13 and relative to the housing The hole 1S6 of 130 is slipped, and the first reel portion 152 is shrunk and "lock" on the dragging drum portion 丨46. The two torques of the drag brake assembly provide resistance to rotation of the drum 146 relative to the outer casing 13 and rotation of the output spool 122 relative to the outer casing 13 . The amount of torque used to pull each direction of rotation of the brake and which torque is greater depends on the particular application. In order to assemble the spring motor and the drag brake assembly 1 2, the sheet spring κ 124 is fastened to the output spool 22 as already described. The stepped coil spring slides over the dragging drum portion 146 of the output spool 122, and the assembly is placed inside the brake housing portion 130, and the central opening 166 of the leaf spring 124 is at the hollow shaft projection of the brake housing portion 130. A sliding 158 and stepped coil spring 126 is disposed inside the drag 156. Motor housing portion 128 is then mated to 126756.doc -14-200839081 to brake housing portion 130. U.S. Patent Application Serial No. S/N 11/382, 089 ", which is incorporated herein by reference. Snap-

In the context of Together Design for Component Assembly, the case is hereby incorporated by reference.) The short shafts 48, 15 of the output spool 122 are placed in respective portions of the motor housing portion 128 and the drag brake drum portion 146. Openings 172, 174 (see Fig. 5) are provided for rotatably supporting the output spool 122. As seen in Fig. 5, the leaf springs ι24 are shown in the "displaced" position, which are all wound up in storage. On the reel 162. The stepped coil spring 126 is shown in an intermediate position wherein the first coil portion 152 is tightly wound around the dragging drum portion 146 and the second coil portion 154 is also tightly wound against the drag wheel 156 . As explained earlier, as the bottom rail no of the curtain 1 is pulled downward by the user, the stepped coil spring 126 expands or unfolds, so that the second coil portion 154 is tightly locked to the drag wheel 156, The first reel portion 152 extends away from the dragging drum portion 146, which allows the brake to slip at the brake drum portion 146 at the higher of the two torques of the towing brake assembly, which is referred to as the holding torque. The user must overcome this holding torque and the torque required to wind the leaf spring 24 on the output spool 122 and any other system torque to reduce the curtain 1 〇〇, and such torque is also once the user releases the curtain 100 Then prevent the torque from falling off the curtain. Figure 1 shows how the combination of the spring motor and the drag brake unit 1〇2 can be installed in the curtain H). Since the lifting rod 118 is completely integrated by the spring motor and the drag brake 1 (via the axially aligned through opening I26756.doc 200839081 176 in the output spool 22), the spring motor and the drag brake assembly 1〇2 can be Mounted anywhere along the length of the head rail, between the lifting sills 6 or on either side of the lifting platform 116. This design offers more installation flexibility than the mounting flexibility offered by prior art designs. Note that in Figure 4, the through opening 176 in the output spool 122 has a non-circular cross section. In fact, in this particular embodiment, it has a 'V' notch profile 176 that matches a lift bar 118 having a similar profile. Thus, rotation of the output spool 122 causes a corresponding rotation of the lift bar 118, and vice versa The storage reel 162 is also a hollow reel defining a through opening 164 through which another rod (such as another lifting rod 118) can extend. However, this opening 164 does not cooperate with the rod for driving engagement. Only one channel is provided for the rod to pass through. As shown in Fig. 6B, this results in a non-closed configuration for two independent parallel drives. For bottom-up/top-down as shown in Figure 6A This is especially required for the operation of the curtain 1 。 2. As shown in Figure 6B, the ability to mount a type of drive control element (such as a spring motor or brake) anywhere along a plurality of axes allows for wide The functionality of the range. The configuration shown in Figure 6B uses one axis 1 22 to raise and lower one portion of the cover and the other axis 1024 parallel to the first axis 22 to raise and lower another portion of the cover. But make Two or more axes also permit other functions. For example, as described in U.S. Patent No. 6,536,503, one shaft can be used to raise and lower the covering and the other shaft can be used to slant the slats on the covering. Figure 6B depicts a top-down/bottom-up curtain (7), 126756.doc -16·200839081 using two spring motors and a drag brake combination 102, one for each lift bar 1022, 1024. Curtain 1〇〇2 includes a top rail 1004 having an end cap 1〇〇6, an intermediate guide 1008 having an end cap 1010, a bottom guide 1012 having an end cap 1〇14, a honeycomb curtain structure 1〇16, a spring motor and a drag Brake combination 102M, 102B, two bottom rail lifting platforms 1〇18, two intermediate rails k幵1020, bottom guide lifting rods 1〇22, and intermediate guiding lifting rods 1024 自 in the top-down of Figure 6B In the case of a bottom-up curtain 1〇〇2, the spring motor and the drag brake combination 1〇2Μ, 102B, the lifting tables 1018, 1020 and the lifting bars 1022, 1024 are housed in the top guide 1〇〇4 Lifting rods or shafts 1022, 1024 are completely passed through the spring motor and drag The vehicle combination is 1〇2Μ, 1〇2Β, but each of the lifting rods or shafts 1〇22, 1〇24 is only one of the spring motor and the drag brake combination and does not engage the other. In the case of passing the other, the front lifting bar 24 operatively interconnects the two lifting tables 1〇2〇, the magazine motor and the drag brake combination 102M and the intermediate rail 1008 via the hoisting rope 1030 (see FIG. 6A). But only by another spring motor and the drag brake combination 102B. The rear lift bar 1022 interconnects the two lift tables 1018, the spring motor and the drag brake combination 102B and the bottom rail 1〇12 via the hoisting rope 1032 (see Fig. 6A), but The combination 102M is only pulled by the other spring motor and the drag brake. In this case, the intermediate rail 1008 can travel all the way up until it is stationary just below the top guide 1004, or it can travel all the way down until it is stationary directly above the bottom guide 1012, or the intermediate guide 1〇 〇8 can be kept anywhere between these two extreme positions. The bottom rail 1〇12 can travel straight up until it is stationary below the intermediate rail 1008 (regardless of where the intermediate rail 1008 is now), or it can travel all the way down until it extends The entire length of the curtain 1002, or the bottom guide 1〇12, can be maintained anywhere between the two extreme positions. Each lifting bar 1022, 1024 operates independently of one another using its respective components in the same manner as described above with respect to a single bar system, the front bar 1024 being operatively coupled to the intermediate rail 1008, and the rear bar 1 The cymbal 22 is operatively coupled to the bottom rail. Referring briefly to Figure 6B, the spring motor and the drag brake combination i 〇 2B, 102M may be identical, or they may have differences. The stepped discs may have different line diameters (or different line cross-sectional dimensions) so that Customized holding torque and release torque for each brake. The larger diameter wire (or larger wire cross-sectional dimension) used in the stepped coil spring 126 results in higher holding torque and release torque. Regardless of whether it is equivalent or not, the spring motor and the drag brake combination ι〇2Β are “turned over” with respect to the spring motor and the drag brake assembly during installation. The lift bar 1022 for the bottom guide 1012 is passed through the spring motor and the drag brake. The through opening 176 in the output spool 122 of the combination 102B (and engages the output spool 122). It is also coupled to the through opening 164 of the storage spool 162 of the drag pulley by a spring motor. Similarly, for the intermediate rail 1 The lifting rod 1024 of the 〇〇8 is combined with the pulling opening 176 of the output reel 122 by the spring motor and the drag brake (and engages the output reel 122). It is also coupled to the drag brake 102B by another spring motor. The through opening 164 of the storage reel 162. Note that it is possible to add more spring motors or more springs when necessary. 126756.doc -18· 200839081 Dragging the brake combination, and (10) these components are used for the shaft or rod H) 22 4 yuan all through its core, (4) it can be donated along the bar, deleted in the place of the place. Also pay attention to make two or more axes completely through a magazine = as the outer casing of the drive assembly The ability (at least - the shaft operatively tampers the η and at least - the other shaft does not operatively fit the spring) permits a combination of the width of the piece within a system. The material (4) for the drive assembly can be a separate motor, Separate magazine, combination of spring motor and yoke as shown here, or other components. Other embodiments of spring motor and drag brake combination FIGS. 7 to 11 depict a spring motor and drag brake combination 1 〇 2 Another actual addition. The comparison with this embodiment highlights the difference between this embodiment 1-2 and the previously disclosed embodiment 1-2. This embodiment includes functional linking by the spring # connector m Two "practical" coil springs 126S, 126L together instead of a single stepped disc yellow 126. The first coil spring 126S has a smaller coil diameter and the second coil spring 126L has a larger coil diameter. The spring coupler 127 is a washer-type device that defines a longitudinal slot 178' that receives the extended ends 180', 182' of the coil springs 126S, 126L, respectively. Since the coil spring 1268 has a smaller coil diameter, as shown in Fig. 1, it fits inside the coil spring 1261 having a larger diameter, and the extended ends 180', 1821 are adjacent to each other within the slot 178. The spring coupler 127' defines a central opening 1841 that allows the spring lighter 127 to slide over the minor axis 1 50' of the output spool 122'. Spring | horse connector 127, allowing the two springs 126S, 126L to be made of wires having different diameters (or different wire cross-sectional dimensions 'because the wires do not need to be so circular) to have a line 126756.doc -19- < S 3 200839081 and still acts as a single spring when the output reel 122' is rotated. The figure "shows two coil springs 126S, 126L functionally linked by spring coupler 127' and mounted on output spool 122. This spring motor is combined with a drag brake 1'2 to interact with the above described camcene motor The drag brake assembly 102 operates in the same manner except that the use of the two coil springs ^^, 126L allows for flexibility in individually selecting the wire cross-sectional dimensions for each of the coil springs 126S, 12". In this manner, for each The application selects the correct (or desired) braking torque more precisely. For example, Figure 7 depicts a larger cross-sectional dimension than the larger disk yellow 126L used to clamp the drag wheel 156, for clamping to Dragging the brake drum portion 146, the cross-sectional dimension of the surrounding small coil spring 1268. Due to the slip torque (the torque of the coil spring slipping through the surface it grips) is the direct control of the line rank section for the coil spring The function (the larger the line cross-sectional dimension, the higher the slip torque, everything else is equal), so the embodiment shown in Figure 7 has a smaller coil spring 丨26S than has a smaller cross-sectional line. Smaller spring motor and dragging brake The holding torque with a large holding torque (the larger of the two torques). Fig. 12 and Fig. 13 to Fig. 15B depict another embodiment of the spring motor and the drag brake combination 1, 2, compared with Fig. 2. The difference between this embodiment 1 〇 2" and the previously disclosed embodiment 1 〇 2 is quickly highlighted. This embodiment 丨〇 2" includes a plurality of identical or very similar components, such as motor output spool 122", leaf spring 124" (or motor spring 124"), motor housing portion 128", brake housing portion 130f', drag Brake drum portion 146M and coil spring 126". As described below, 'some of these items are slightly different from 126756.doc -20* 200839081 described with respect to the previous embodiment, and this embodiment 1 〇 2" There is also a mounting sleeve 127", the mounting sleeve 127 is desirable but not absolutely necessary for the operation of the bomb I motor and the tow (4) car - 1G2". (Figure 19 is shown again - Example 1〇2* does not use a casing.)

The obvious difference is that the dragging drum portion 146" is a separate piece that is rotatably supported on the motor output spool 122, the shaft extension portion 148. As can be seen from Figure 15A, the motor output spool 122" is rotatably supported on the outer trowel 128, 130 and the dragging drum portion 146 is rotatably supported on the motor output spool 122"48" on. The motor output spool shaft 122" and the drag brake drum portion 146" has a hollow vehicle consisting of μ", 186, which has a non-circular cross section (see also Figs. 12 and 14) to engage the lift rod ι8. The brake peripheral portion 130, 'includes two "ear"188", which define an axially aligned slotted opening to releasably secure the coil spring 126, as described below, with a crimped end 190" . The female sleeve 127" is a discontinuous cylindrical ring having a longitudinal slit 192" which allows the loops to collapse to a smaller diameter. For example, the coil spring 126 is equally (although if necessary) In order to achieve the desired torque, the coil springs 126" may have different wire diameters, and the sleeves 127 are equally equated. As explained in the explanation of the operation of the spring motor and the drag brake combination 102", when necessary and appropriate It is possible to use only one set of mounting sleeves 127, and coil springs 126". Figure 102, showing two sets of mounting sleeves 127" and discs for achieving greater holding torque (more braking power) Spring 126, of course, additional sets may be used if necessary (and if can be accommodated on the dragging drum portion 146"), again, as in the embodiment 1〇2* of Fig. 16 described in more detail later Proof that the placement of the 126756.doc -21 - 200839081 tube 127" is optional. The tray 126" can be placed directly on the outer diameter of the dragging drum portion 146", but the use of the sleeve 127" For hauling Portion 146, and mounting sleeve 127" more flexible selection of suitable material. For example, mounting sleeve 127" may advantageously be provided with some flexibility (so that it can be crimped to the dragging drum portion 146" Made of outer diameter and a material with self-lubricating properties. In addition, if the sleeve 127" is used, it is possible to replace only the sleeve 127" in the case of high wear between the coil spring 126" and the sleeve 127" rather than having to replace the drag drum portion 146". The remainder of the description describes only a set of mounting sleeves 127 " and coil springs 126" (unless otherwise noted), it should be understood that two or more sets may be used, the principle of operation being substantially the same as described above but having the advantage of The result. The sheet spring t 124" is assembled to the motor output spool 122" in the same manner as described for the motor output spool 122 of FIG. The assembled leaf spring 124" and the motor output spool 122" are then assembled to the motor housing portion 128'' and the brake housing portion 13A, the plate spring 124, the opening I%, respectively in the motor housing The portion 128" and the outer casing portion 13〇, the hollow shaft projections 158" and 160" slide. Next, as shown in FIG. 15B, the mounting sleeve 127" and the coil spring 126 are assembled to the dragging drum portion 146, 'on which the sleeve 127 is placed, and the coil spring 126 is mounted in series on the dragging drum portion. 146" on the outer diameter. The coil spring 126" is mounted on its corresponding mounting sleeve 127" such that the coil spring 126, the crimped end 19〇!, protrudes through the sleeve 127, the slotted opening 192,. Each-mounting sleeve 127" includes a circumferential flange 194" at the end of the female to assist in preventing the coil spring Ha 126756.doc • 22 - 200839081 200839081 from being placed between the spring motor and the drag brake combination 02, Period casing 127 " slip. Then, the "Tray (4) tilting portion 146 ", the coil spring 126" and the mounting sleeve 127" are mounted on the extension shaft (4) of the motor output spool 122", thereby ensuring the curl of each-spring spring U6, The end 19〇" is fastened to the slot opening 188 of the outer casing portion of the brake. Tow the brake drum portion 146 "spins' until the motor output spool 122' and the dragging drum portion 146"

The profiles m,, 186, are aligned so that the lift bar 8 can be inserted through the entire assembly as shown in FIG.

During operation, as shown in the vantage point of Figure 12, as the motor output spool 122" rotates counterclockwise (corresponding to the reduction of the curtain (10) and the sheet spring 124" from the storage reel j 62, ι to the motor output Reel 122, transfer), motor output reel 122, and drag the brake drum part! 46, in this counterclockwise rotation. The sleeve 127 is placed in the same direction (due to the friction between the sleeve 127 and the dragging drum portion 146" and also causes the disc κ 126 to rotate in this same direction (due to The friction between the sleeve up and the coil spring 126" is placed. However, the curled end of the coil spring 126, is clear, fastened to the brake housing portion 13" and prevented from rotating, so with the coil spring 126 The remainder begins to rotate in a counterclockwise direction, and the coil spring 126" is tightened onto the mounting sleeve 127" the sleeve 127 is placed, slightly crimped over the outer diameter of the dragging drum portion 146", thus providing a drag The increase in the rotation of the brake drum portion 146 " (and the lifting and pulling drum portion 146, the lifting rod 118) is a combination of the yellowing motor and the dragging brake when lifting the curtain 100. 102"Auxiliary 126756.doc • 23 - 200839081 The user 'because the slab 田士丨士士 κ 124 from the motor output reel 122" unwinding (rotating the drum) and winding on the storage reel 162, on. Drag the brake 2: also rotate clockwise, 126 Shunri Rotation of the needle , due to the coil spring 126, the curled end 190 is tight... the shell portion 130·, the groove shape 88,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, For the casing 127 Μ and the drum part 146|! teach the car; ^ @ ..., dry torque. In the 'month condition from the coil spring 126, drag the brake drum part 146, so the motor can be rotated The user can easily raise the curtain 1 UU ° to ride the same spring motor and drag brake combination 102 as in Fig. 12, in addition to the coil spring, and the dragging brake group 1〇2" ^, . One of the 126" is turned over m degrees relative to the coil spring 126" and it is made of a wire material having a thinner cross section. Now, when the dragging drum portion 146" is rotated clockwise, the sleeve 127&quot And the two springs m" also rotate clockwise. In this case, turn clockwise: so that the two coil springs 126'' end close to the sleeve 127", thereby reducing the placement of the sleeve 127'' The inner diameter and therefore the clamping on the dragging drum portion "... on this second coil spring 126" The cross-sectional diameter is smaller than the cross-sectional diameter of the first coil spring 126", so when the dragging drum portion 146" is rotated in a clockwise direction, the drag torque is less than when the dragging portion 146" is rotated counterclockwise The drag torque applied to it. If the cross-sectional dimension of the line of the second coil spring is greater than the cross-sectional dimension of the line of the first disc yellow 126", the braking torque in the clockwise direction will be larger. If the two coil springs U6" are identical but still opposite each other, the braking torque in both directions will be the same. 126756.doc -24- 200839081 Figures 16 and 17 depict another embodiment of a spring motor and drag brake combination 1〇2*. This embodiment 1〇2* is shown to be substantially identical to the previously disclosed embodiment 102", as compared to Figure 12, except that this embodiment does not have a mounting sleeve 127, and it has only a single disk 126*. As in the case of the embodiment 102n previously described, two or more of these coil springs 126* may be used as necessary. The coil spring 126* is directly placed on the outside of the dragging drum portion 146*. The non-use mounting sleeve 127". In addition to these differences, the spring motor and the drag brake assembly 102* operate in substantially the same manner as the previously described embodiment 1 〇 2". Please note that the combination of all spring motors and drag brakes as described in this article 'in this spring motor and drag brake combination 丨〇 2*, has become the elliptical I26** or the plate springs 124· **. If the disc 126** is omitted, the spring motor and the drag brake assembly 102* operate only as a spring motor, without dragging the brake performance. Similarly, if the leaf spring 124** is omitted, the spring motor and the drag brake combination 1 〇 2 * operate only as if the brake is being pulled, and there is no motor performance. Figure 18 depicts another embodiment of a combination of a spring motor and a drag brake. Comparing with FIG. 5, this embodiment 1〇2** is substantially identical to the embodiment 102' except that in this spring motor and drag brake combination 1〇2**, the storage reel 162* is not as in the previously described embodiment 1 The case of 〇2 is a hollow reel. Therefore, in this case, the lifting bar cannot pass through the storage reel 162*°. In addition to this difference, the spring motor and the drag brake assembly 102** operate in substantially the same manner as in the embodiment 102. 19 and 20 depict an embodiment of a leaf spring (or motor spring) that is 126756.doc -25-200839081 which may be used in the embodiments described herein. The leaf spring 124 shown in the step #丨 is made by tightly winding a flat metal strip on itself, and then the coil is subjected to stress relief. The leaf spring defines an inner diameter 196 which, in this embodiment, is 〇25 inches. The spring I24 shown at the end of step #1 can be used in the above embodiment, or as shown in Fig. 19, the spring can be subjected to an additional step. e In step #1, the meal 124 is first wound so that the first end 200 of the magazine 124 is inside the coil and the second end 2〇2 of the spring 124 is in the outer portion of the belt. The coil spring 124 is then stress relieved, so that it employs the coil set shown in Figure 1, the spring having a smaller radius of curvature at its first (inner) end and gradually and continuously increasing to its second ( Outer) end. Next, in step #2, the coil spring 124 is reversely wound until it reaches the position shown in step #3, wherein the end 200 of the spring 124 (having a smaller radius of curvature of the coil group) is now in the coil Externally, and the end 2〇2 of the spring 124 (having a larger radius of curvature of the coil set) is now inside the coil, the radius of curvature of the coil set is gradually and continuously reduced from the inner end to the outer end. This reverse wound coil 124R is no longer stress relieved. Again, the reverse wound coil 124R defines an inner diameter 198 that is preferably slightly larger than the inner diameter 196 of the original leaf spring 124. In this embodiment 124R, the inner diameter was 〇·29 inches. Figure 20 graphically depicts the power assisted torque curve for a standard wound sheet spring 124 (as it is at the end of step #1) and is applied to the reverse wound leaf spring 124R at the end of step #3 of Figure 19. The torque curve is compared. It is drawn from the moment when the spring begins to unwind (at the extreme left of the graph) until it is completely unwound (toward the middle of the graph, this is the curve showing a sharp drop of 126756.doc -26·200839081 points) and then returns until Torque until the spring is completely re-wound (extreme right of the graph). It can be appreciated that the power assisted torque curve of the reverse wound leaf spring 124R is a flat curve that is flatter than the curve of the standard wound plate spring 124 over the entire operating range of the spring. This flatter torque curve is typically the desired characteristic for the type of spring motor used to raise and lower the window covering. Referring briefly to Figure 2, if the leaf spring 124 is replaced by the reverse wrap spring 124R of Figure 19, the end 20 〇 of the reverse wrap spring 124 (which has a smaller radius of curvature of the T-volume set) has holes At the end 142 of the 144, the aperture allows the reverse wrap spring 124 to be attached to the output spool 122. The lever arm acting on the output spool 122 is defined as the distance from the axis of rotation of the output spool 122 to the surface 132 of the output spool 122. This lever arm is minimized when the reverse wrap spring i24R is substantially unwound from the output spool 122 and is substantially wound on itself. Therefore, in the case of this configuration, the portion of the reverse winding spring i24R having the highest spring rate (minimum coil group radius of curvature) acts on the minimum lever when the reverse winding spring 124R is substantially wound on the output spool 122 At this time, the lever arm acting on the output spool 122 will increase the thickness of the spring coil that is now wound on the output winding 122. Therefore, when the reverse winding spring 124 and the lowest spring rate (the portion having the largest radius of curvature of the coil group) act on the output spool, the lever arm will be the largest. The end result is a smoothed output of the power assisted torque curve, as shown in Figure 20. The procedure for the reverse wrap spring 124 depicted in Figure 19 is only one way to vary the spring rate along the length of the spring while maintaining the uniform thickness and width of the metal strip forming the spring. Similar results can be obtained using other procedures, and 126756.doc • 27· 200839081 It is possible to design the coil set curvature of the spring 124 to obtain a torque curve with a negative slope or any other desired slope.

For example, the metal strip forming the spring Η# can be dragged over the anvil at varying angles to change the curl of the coil set (and thus the spring rate) of the various portions of the spring 124 without changing other physical parameters of the spring . By changing the angle of the metal over the anvil, the spring rate can be continuously increased or continuously reduced from one end of the spring to the other end, or it can be increased from one end to an intermediate point, in the coil It remains constant for a particular length and then decreases, or increases and then decreases, or changes step by step or in any other desired pattern, depending on the application for which it will be used. The radius of curvature of the coil of the spring can be manipulated as necessary to produce the desired spring force at each point along the spring to produce the desired power assisted torque curve for any particular application. First, the radius of curvature of the coil set in the technique is on the board. The leaf spring is generally constant throughout its length or continuously increases from the inner end 2〇〇 to the outer end 202, which is connected to the output spool of the spring motor. However, as explained above, the reverse wrap springs shown in step #3 of Figure 19 have the same conditions as many of the other well-designed leaf spring configurations described above, The leaf spring can be subtly designed such that a portion of the leaf spring that is remote from the end of the output spool can have a larger radius of curvature than a portion of the leaf spring that is closer to the end of the output spool. With a volume group. The swivelling radius of curvature may have a third portion that is still far from the end connected to the output reel, the third portion being smaller than the larger radius portion, or it may remain strange from the larger radius portion to the other end 126756.doc -28- 200839081 And so on. It will be apparent to those skilled in the art that the above-described embodiments can be modified without departing from the fourth paragraph (4) as defined in the scope of the patent application. For example, a towing brake mechanism can be attached to a spring motor (10) mounted to rotate relative to the housing, which will still be functionally attached to the output spool of the spring motor and still achieve (4) Results 1

Many other modifications. T [Simple diagram description]

Figure 1 is a partially exploded perspective view of the shade and the spring; the driver for the shade of the motor; Figure 2 is an exploded perspective view of the spring motor of Figure 1; Figure 3 is a perspective view of the assembled motor of Figure 2. Figure 4 is an end view of the spring motor of Figure 3; Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4; top-down/bottom-up curtain

Figure 6 is a perspective view of the self-curtain of the spring motor of Figure 3; Figure 6 is a partially exploded perspective view of the head rail of Figure 6 in the head guide with two sets of drive pins; Figure 7 is 8 is a perspective view of the assembled motor of FIG. 7; FIG. 9 is an end view of the spring motor of FIG. 8; FIG. 10 is a line 10-10 along the line of FIG. 1 is a perspective view of the assembled motor output vehicle of FIG. 7; I26756.doc -29- 200839081 FIG. 12 is an exploded perspective view of another embodiment of a spring motor; Figure 12A is an exploded perspective view similar to Figure 12 of another embodiment of the spring motor; Figure 13 is an assembled view of the spring motor of Figure 12; Figure 14 is an end view of the spring motor of Figure 13; Figure 15A is along Figure 15B is a perspective view of the assembled dragging drum, mounting sleeve and coil spring of Figure 12;

Figure 16 is an exploded perspective view of another embodiment of the spring motor; Figure 17 is an assembled view of the spring motor of Figure 16; Figure 18 is a cross-sectional view similar to Figure 15 but with respect to the spring motor of Figure 17; Schematic diagram of the three steps involved in the reverse winding of the piece of the yellow motor; and the standard winding of the second figure* and a reverse winding - [Major component symbol description] 100 102 102B 102M 102, 102" 102* 102** Honeycomb / Honeycomb spring motor and drag brake combination / device Spring motor and drag brake combination spring motor and drag brake combination spring motor and drag brake combination spring motor and drag brake combination spring motor and drag brake combination spring Motor and drag brake combination 126756.doc -30- 200839081

108 Head Guide 110 Bottom Guide 112 Curtain / Honeycomb Curtain Structure / Honeycomb Curtain Structure 116 Lifting Table 118 Lifting Rod 120 End Cap 122 Motor Output Reel 1221 Output Reel 122" Motor Output Reel 124 Plate Spring 124 R Reverse Roll Winding/Reverse Winding Plate Spring 124” Plate Spring 124* * Plate Spring 126 Spring 126L Coil Spring 126S Coil Spring 126" Coil Spring 126* Coil Spring 126** Coil Spring 127, Spring Coupling 127M Mounting sleeve 128 Motor housing portion 128" Motor housing portion 130 Brake housing portion - 31 126756.doc <s> 200839081 130" Brake housing portion 132 Output spool/spring take-up portion/surface 134 Left shoulder 136 Right shoulder 13 8 flat recess 140 raised button 142 first end 144 through opening / hole

146 Dragging the drum section 146» Dragging the drum section 146" Dragging the drum section 146* Dragging the drum section 148 Short shaft 148'' Shaft extension/extension shaft 150 Short shaft 150' Short shaft 152 First coil section 154 Two-roll portion 156 cavity/shell hole/pull brake hole 156' drag wheel 158 inner hollow shaft protrusion 158" hollow shaft protrusion 160 inner hollow shaft protrusion 160" hollow shaft protrusion 126756.doc -32- 200839081

162 leaf spring storage reel 162" storage reel 162* storage reel 164 through opening 166 central opening 166M opening 168 nail 170 bridge 172 through opening 174 through opening 176 through opening / πνπ notch profile 176, f hollow axis / non-circular Profile 178, longitudinal slot 180f extension end 182, extension end 184, central opening 186" hollow shaft/non-circular profile 188u ear/groove opening 190 crimped end 190, f crimped end 192" longitudinal slit/grooved opening 194&quot ; circumferential flange 196 inner diameter 198 inner diameter 126756.doc -33 - 200839081 200 first end 202 second end 1002 bottom-up / top-down curtain 1004 top rail 1006 end cover 1008 intermediate guide 1010 end Cover 1012 bottom guide

1014 End cap 1016 Honeycomb curtain structure 1018 Bottom guide lifter 1020 Intermediate guide lifter 1022 First axle/bottom guide lifter 1024 Axle/intermediate guide lifter 1030 Lifting rope 1032 Lifting rope

126756.doc -34-

Claims (1)

200839081 X. Patent application scope · 1. A combination of a spring motor and a tow (four) vehicle, which comprises a rotating wheel reel, which is mounted in a clockwise direction and a counterclockwise direction: a motor spring wound around itself And defining a first + a 篥-s, a first end and a one end, the first end is fastened to the output reel; and a brake, which includes a win, m is connected to the output reel, Rotating the 丨 丨 reel to cause the brake drum to rotate; ^ a coil spring assembly mounted on the brake drum; and an outer casing; wherein the coil spring assembly resists the coil spring assembly煞: The clockwise direction and the counterclockwise direction are mounted relative to the housing: the garment member, and the torque required to overcome the rotational resistance is greater than the torque required in the other direction in the other direction. 2. The combination of the spring motor and the drag brake, wherein the outer casing defines an inner bore, and the coil spring assembly includes a smaller diameter spring portion and a larger diameter spring portion; Timekeeping When one of the needle direction and the counterclockwise direction is rotated relative to the outer casing, the smaller diameter spring portion is collapsed = the brake drum is mounted and the larger diameter spring portion is retracted away from the inner bore; and μ When the brake drum rotates relative to the outer casing in the clockwise direction and the counterclockwise direction, the smaller diameter spring portion expands away from the brake drum and the larger straight (four) expands. Reaching the internal hole and 3. The spring motor of claim 2 and the dragging and unloading package > _ # # # ^ , '' 1 2 3, wherein the coil spring total k is for the smaller diameter magazine portion第二 the second complex-capture of the larger diameter spring portion - the catching coil spring and the second disk 箬 are: 2 and - functionally connected to the rotating material (four) device (four) 4 (four) as a "single" assembly a 4. a combination of a brake motor and a blanket brake, wherein the total moment of the coil spring resists a torque applied to the (four) hole of the outer casing, the twisting drum being in a clockwise direction and the direction of the needle relative to (4); and wherein the coil spring The assembly is allowed to slip relative to the brake drum 1 to allow the brake Rotating relative to the housing in response to one of the clockwise direction and the counterclockwise direction, and the coil spring assembly slips relative to the aperture of the housing to allow the brake drum to be relative to the other of the directions Rotate the outer casing. 126756.doc 1. In combination with the spring motor of the item 4 and the dragging brake, the motor spring is wound as the smaller diameter flat portion is extended away from the #$ knife to retreat from the brake drum. On the output reel. 2 6. The combination of the spring motor of claim 5 and the dragging brake, wherein the smaller diameter spring portion is made of a wire having a dimension of the "cross" plane, and the rut is straight The us portion is made of a wire having a second cross-sectional dimension different from the first cross-sectional dimension. 3. The combination of the spring motor of claim 1 and the drag brake, and further comprising a cover for the opening of the building, the cover functionally connecting the 200839081^the drum so that the brake drum is extended with the cover Rotating (4) the sliding direction and the counterclockwise direction (4), the cover is returned, and the other of the clockwise direction and the counterclockwise direction is used to operate the two items of the item 2, the motor and the dragging brake Combination, wherein the outer casing boundary, the '24 axial alignment opening σ and the two parallel opening passages, each opening completely extending through the outer casing and through the respective axial alignment 10 ^ alignment And adapted to receive - a shaft extending through the outer casing, the 9 such as the passage extending axially through the output spool. • Two: Two combination of the impeller motor and the drag brake, where the smaller is straight. a knife and the larger diameter spring portion are a single spring part of the spring motor and the drag brake combination, wherein the disc is integrated with the first disc mounted on the brake drum, the first disc is clockwise ^ W The first end of the outer casing, wherein when the output reel rotates in the direction of the == direction and the counterclockwise direction, the first disc is only level, % on the brake drum. • Two: the combination of the elastic motor and the drag brake, wherein the disc 2 includes a second disc mounted on the brake drum, the second shaft being attached to the first end of the outer casing, wherein When the output volume rotates in the direction of the feed and the other of the counterclockwise directions, a plate of yellow wrinkles on the brake drum. •::: The spring motor of item 10 is combined with a towing brake, wherein the coil spring is always a shrinkable sleeve between the brake drum and the first coil spring. 126756.doc 200839081 The spring motor of claim 10, in combination with a drag brake, wherein the outer casing I, the two axially aligned openings and the two parallel open passages each extend through the outer casing and through One or more of the axially aligned pairs are adapted to receive a shaft extending through the outer casing, one of the open passages extending axially through the output spool. 14. A covering system for covering a building opening, comprising: a movable covering; and a magazine motor operatively coupled to the movable covering, the motor comprising an output reel and a a leaf spring having a first end connected to the output spool, wherein at least a portion of the leaf spring that is further from the first end has a coil set, the coil set having a distance from the leaf spring The first end is relatively close and has a large radius of curvature of a second portion of the coil set having a smaller radius of curvature. 15. The covering system of claim 14 for covering a building opening, wherein a radius of curvature of the leaf spring is continuously increased from a smaller radius of curvature at the first end to a second end A large radius of curvature. 16. The covering system of claim 14 for covering a building opening, wherein the sheet spring is located further from the third portion of the first end than the portion, the third portion having a ratio A small volume group with a small radius of curvature. 17. The covering system of claim I4 for covering a building opening, wherein the output spool is rotated in a clockwise direction and a counterclockwise direction by a women's wear, and further comprises a one-piece drum, functionally connected Up to the output reel, such that the rotation of the reel 126756.doc -4- 200839081 causes the brake drum to rotate; an outer casing; a disc yellow assembly that is mounted on the brake drum by causing the coil spring assembly to resist the mounting member of the brake drum that rotates in the clockwise direction and the counterclockwise direction relative to the outer casing, overcoming the rotational resistance The required torque is greater in these directions than in the other direction. 18. The covering system of claim 17 for covering a building opening, wherein the outer casing defines an inner bore; wherein the coil spring assembly includes a smaller diameter spring portion and a larger diameter spring portion, wherein Brake drum according to: in the clockwise direction and the counterclockwise direction, the smaller straight spring portion is shrunk on the brake drum and the larger diameter magazine portion is tightened against the inner hole and Wherein the smaller diameter spring portion expands away from the brake drum when the brake drum rotates in the clockwise direction 2 counterclockwise direction, and the larger diameter spring portion expands against the bore . 19. The covering of the item 14 is used for covering - the opening of the building opening. The output spool is mounted in a clockwise direction and counterclockwise and further comprises: a system in which a rotation is made, and an eight-knife is violently connected to the output reel Having the rotation of the take-up reel causes the brake drum to rotate; an outer casing; and a disc-spring mounted to the brake-fastened to the first end of the outer casing, the disc-shaped bag Ms. In the direction of the reel (4) and the hour hand (4) - when it is light, 126756.doc 200839081 shrinks on the brake drum. 20. A covering system for covering a building opening, comprising: a movable covering; a first shaft 'operably coupled to the covering; a second shaft operatively coupled to a cover; a housing; and a spring in the housing; wherein the first shaft and the second shaft extend completely through the housing, the first shaft operatively engages the spring, and the second shaft does not operate The spring is sexually engaged. 21. The covering system of claim 20, wherein the magazine is a sheet spring, and further comprising an output reel coupled to one end of the sheet yellow, wherein the A shaft operatively sprays the spring by halving the reel. 22. The covering system of claim 20 for covering a building opening, wherein the spring is a coil spring; and further comprising: engaging a drum of the cartridge, wherein the first shaft is coupled by a ring The brake drum operably shouts the spring. 23. The covering system of claim 20 for covering a building opening, the first axis and the second axis being parallel to each other. A cover system for covering a building opening of claim 23, wherein the cover has a width dimension and a height 庳 n degree dimension, and wherein the substantially spans the width dimension and One of the height dimensions 126756.doc -6- •i .S >