JP2022136760A - Two-way openable curtain - Google Patents

Abstract

To provide two-way openable curtain including an upper beam, a middle beam and a lower beam, in which a lifting control structure is installed at the upper beam, and a shielding structure is installed between the middle beam and the lower beam.SOLUTION: The lifting control structure operates a first rotating shaft or a second rotating shaft to rotary, and thereby a first pull cord or a second pull cord is rewound or pulled out at the same time, and the first pull cord moves a middle beam and the second pull cord moves a bottom beam. In addition, a one-way clutch and a preload unit are installed on the upper beam, and when the lower beam moves by pushing the middle beam upward, the one-way clutch disconnects interlocking of the first rotating shaft and the lift control structure. The driving force generated by the preload unit immediately rotates the first rotating shaft, and unwinds the first pull cord, thereby maintaining a strained situation of the pull cord.SELECTED DRAWING: Figure 3

Description

FIELD OF THE INVENTION The present invention relates to a curtain structure, and more particularly to a two-way opening and closing curtain capable of changing the light transmission (or shielding) area of the curtain.

The configuration of the two-way opening and closing curtain (top down, bottom up, TDBU) includes an upper beam, a middle beam and a lower beam, and a shielding structure is installed between the middle beam and the lower beam, and both ends of the shielding structure are connected to the middle and lower beams, respectively. The middle beam and the bottom beam are linked with different pulling cords to achieve vertical displacement and fixed position, respectively, to change the deployment or convergence state of the shielding structure, and to allow the two-way opening and closing curtain to transmit light. The purpose of changing the (or shielding) area arbitrarily can be achieved.

The conventional two-way opening and closing type curtain operates and moves the middle beam or the lower beam by pulling the exposed control cord, and the control cord combines the clutch, actuator and latch with the lifting control structure. to achieve the purpose of independently rotating the first rotating shaft or the second rotating shaft. The first rotating shaft rewinds or pulls out the pulling cord that moves the middle sill, and the second rotating shaft rewinds or pulls out the pulling cord that moves the lower sill. However, the conventional two-way opening and closing type curtain only works when the lower beam has completely converged the shielding structure in the process of actually manipulating and raising the lower beam to increase the translucent area (that is, the lower beam When the distance between the middle beam and the middle beam becomes minimum), when a person continues to pull the control cord consciously or unintentionally, the lower beam continues to move upward, further pushing the middle beam upward. In this case, since the distance between the upper beam and the middle beam is reduced, the cord portion that is positioned between the upper beam and the middle beam and moves the middle beam is compressed, and the first rotating shaft is driven to rotate. Therefore, the compressed cord portion cannot be rewound and becomes loose, not only spoiling the appearance of the entire curtain, but also, if the cord portion is exposed and tangled, it cannot be restored and the curtain will be damaged. There is also a potential safety hazard due to breakage and the possibility of other objects being caught.

In view of the above problems, the object of the present invention is to provide a two-way opening and closing curtain, which can reliably wind the pull cord between the upper beam and the middle beam when the lower beam moves upward to push up the middle beam. It can be returned to maintain the overall aesthetics of the curtain, ensure smooth operation of the curtain, and reduce the likelihood of other objects being caught on the pull cord.

To achieve the above objectives, the present invention provides a two-way openable curtain comprising upper beams, middle beams and lower beams, and including a shielding structure and a lifting control structure. In addition, a middle beam is movably positioned below the upper beam, a lower beam is movably positioned below the middle beam, and a shielding structure is installed between the middle beam and the lower beam to move up and down. A control structure is installed on the upper beam, the lifting control structure operates the first rotating shaft or the second rotating shaft to rotate, the first rotating shaft rewinds or pulls out the first pulling cord, and the first pulling One end of the cord is fixed to the middle beam, a second rotating shaft rewinds or pulls out the second pull cord, and one end of the second pull cord is fixed to the lower beam. In addition, the curtain further includes a pre-stress unit installed on the upper beam, and the pre-stress unit and the first rotating shaft are interlocked. The curtain further includes a one-way clutch, wherein the one-way clutch is positioned between the first rotating shaft and the elevation control structure, and when the lower beam pushes up the middle beam to move, the one-way clutch is engaged with the first One rotating shaft is disconnected from the lifting control structure, the pre-force unit provides a driving force to the first rotating shaft, the driving force causes the first rotating shaft to rotate, and the first pulling Unwind the code.

The pre-force unit includes a spring, and the spring is interlockably connected to the first rotating shaft to provide the driving force to the first rotating shaft.

The pre-force unit includes a shaft sleeve, the spring is connected to the shaft sleeve, the first rotating shaft passes through the shaft sleeve and is installed in conjunction with the shaft sleeve, and the spring passes through the shaft sleeve to the providing the driving force to the first rotating shaft;

The pre-force unit includes a box, the shaft sleeve is rotatably mounted in the box, the spring has a first end and a second end, and the first end is connected to the box to be fixed and immovable. and the second end interlocks with the shaft sleeve.

The pre-force unit includes a box, the shaft sleeve is rotatably installed in the box, and the spring includes an action part and a rewind part with which the spring is interlocked, the rewind part is located in the box, and the A working part is wound around the shaft sleeve, one end is connected to the shaft sleeve, and the spring provides the driving force to the first rotating shaft by the shaft sleeve.

The pre-force unit includes a box and a winding shaft, the winding shaft is rotatably installed in the box, the spring includes an action part and a rewinding part, and the rewinding part is located in the box. The action part is wound around the winding shaft, one end is connected to the winding shaft, the first tooth is set at one end of the winding shaft, and the second tooth is at one end of the shaft sleeve. installed, the first toothed portion and the second toothed portion are meshed, and the spring is interlocked with the shaft sleeve by the winding shaft to provide the driving force to the first rotating shaft;

A support is installed inside the box, and the unwinding part of the spring is wound around the support.

An interlocking shaft is included, one end of the interlocking shaft is connected to the lifting control structure, and both sides of the one-way clutch are aligned with the first rotating shaft and the interlocking shaft, respectively.

The effect of the present invention is that the pre-force unit provides a driving force to the first rotating shaft so that when the middle sill is pushed up by the lower sill, the driving force rotates the first rotating shaft in a timely manner. can be used to unwind the pull cord that pulls the middle sill and maintain the tension of the pull cord.

3 is a three-dimensional view of a two-way openable curtain according to the first embodiment of the present invention; FIG. Figure 2 is a top view of the curtain shown in Figure 1; FIG. 2 is an exploded view of a portion of the curtain shown in FIG. 1; FIG. 4 is an exploded view of the one-way clutch in FIG. 3; 5 is a cross-sectional view taken along line 5-5 of FIG. 2; FIG. 4 is an exploded view of the pre-force unit in FIG. 3; FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 2; FIG. Fig. 3 is a three-dimensional view of different preload units and winding sets according to the second embodiment of the present invention; 9 is an exploded view of a viewing angle with a pre-force unit in FIG. 8; FIG. 9 is an exploded view of another viewing angle of the pre-force unit in FIG. 8; FIG. FIG. 3 is a three-dimensional view of yet another pre-force unit and winding set according to the third embodiment of the present invention; 12 is an exploded view of a viewing angle with a pre-force unit in FIG. 11; FIG. 12 is an exploded view of another viewing angle of the pre-force unit in FIG. 11; FIG. Sectional drawing of the pre-force unit in FIG.

In order to illustrate the invention more clearly, preferred embodiments thereof are given below and will be described in detail with reference to the drawings. 1 to 3, the two-way openable curtain 100 of the first embodiment of the present invention includes an upper beam 10, a middle beam 12 and a lower beam 14, and between the middle beam 12 and the lower beam 14. A shielding structure 16 is installed to shield light. The shielding structure 16 may include, but is not limited to, Venetian blinds, honeycomb blinds, Roman blinds or roller blinds, and this embodiment is an example of honeycomb blinds. In addition, the two-way openable curtain 100 further includes a first winding set 20, a second winding set 30 installed on the upper beam 10, a lifting control structure 40, a one-way clutch 50 and a pre-force unit 60. Also, another shielding structure may be installed between the middle beam 12 and the upper beam 10, but it should be understood that it is not limited to this.

The first winding set 20 of this embodiment includes a first rotating shaft 22 and two first winding rolls 24, and the first rotating shaft 22 cannot idle relative to the two first winding rolls 24. , so that the first rotating shaft 22 and the two first winding rolls 24 can rotate simultaneously and in the same direction. The two first winding rolls 24 are each connected to one first pulling cord 26 (see FIG. 1), one end of the first pulling cord 26 passing through the upper beam 10 and extending downward to the middle beam. 12 is fixedly connected. The second winding set 30 includes a second rotating shaft 32 and two second winding rolls 34, and the second rotating shaft 32 is also non-idling with respect to the two second winding rolls 34. , the second rotating shaft 32 and the two second winding rolls 34 can rotate simultaneously and in the same direction through the two second winding rolls 34 . The two second winding rolls 34 are each connected to a single second pull cord 36 (see FIG. 1), one end of the second pull cord 36 passes through the upper beam 10 and extends downward to the middle beam. It is fixedly connected to the lower beam 14 after passing through 12 and the shielding structure 16 in turn. In this embodiment, the first rotating shaft 22 and the second rotating shaft 32 are polygonal bars, the first winding roll 24 has a polygonal hole 24a for passing the first rotating shaft 22, and the second The two-winding roll 34 has a polygonal hole 34a for passing the second rotating shaft 32, thereby realizing the purpose of preventing idle rotation with respect to each other.

The lifting control structure 40 is mounted on one side of the upper beam 10 and is rotated by operating the first rotating shaft 22 or the second rotating shaft 32 , and the first rotating shaft 22 rotates to rotate the first winding roll 24 . to rewind or withdraw the first pull cord 26 , and the rotating second rotating shaft 32 moves the second winding roll 34 to rewind or withdraw the second pull cord 36 . The lift control structure 40 for realizing the above objects of the present embodiment includes an exposed and looped control cord 42, which continues to pull down the front cord portion or the rear cord portion of the control cord 42, and further lifts and lowers. A combination of actuators and clutches included in the control structure 40 can independently operate and rotate the first rotatable shaft 22 or the second rotatable shaft 32 to selectively rotate the first winding roll 24 or the second winding roll 24 . The winding roll 34 can be moved to rotate and optionally the first pull cord 26 or the second pull cord 36 can be unwound to change the height of the middle beam 12 or the bottom beam 14 . After completing the action of pulling the control cord 42, a latch contained in the lift control structure 40 limits the rotation of the first and second rotary shafts 22, 32 and raises the middle beam 12 and the lower beam 14 to a non-operating height. ensure that the Since the lift control structure 40 belongs to the prior art, the actuators, clutches and latches installed therein will not be separately disclosed herein.

When the front cord portion or the rear cord portion of the control cord 42 is pulled downward when it is desired to operate the middle beam 12 or the lower beam 14 to move it downward, the latch selectively rotates the first rotating shaft 22 or the second rotating shaft 22. The restriction on the rotating shaft 32 is released, and the first rotating shaft 22 or the second rotating shaft 32 whose restriction is released can rotate freely, and at the same time, the first rotating shaft 22 or the second rotating shaft 32 is supported by the center beam. 12 or the lower beam 14 (and the shielding structure 16) rotates, and the first pulling cord 26 or the second pulling cord 36 is pulled out from the first winding roll 24 or the second winding roll 34, and the middle beam 12 or lower beam 14 can be lowered to the required position. Here, the rotation direction in which the first winding roll 24 unwinds the first pull cord 26 is defined as the first rotation direction, and the rotation direction in which the first pull cord 26 is pulled out is the second rotation direction opposite to the first rotation direction. and Such lift control structures take many different forms in the art, and motorized control structures may alternatively be used. In addition to the single elevation control structure installed on one side of the upper beam 10 and capable of controlling the middle beam 12 and the lower beam 14, which is illustrated in the present embodiment, each installed on both sides of the upper beam 10, Since there are also two lift control structures that can independently control the middle beam 12 and the lower beam 14, detailed description of the lift control structure will be omitted here.

In this embodiment, the first rotating shaft 22 is connected to the elevation control structure 40 by an interlocking shaft 44 and a one-way clutch 50, the interlocking shaft 44 being a polygonal rod and one end being connected to the elevation control structure 40. may be linked. Both sides of the one-way clutch 50 are respectively aligned with one end of the first rotating shaft 22 and one end of the interlocking shaft 44 , and one action of the one-way clutch 50 is that the interlocking shaft 44 is limited to the latch of the elevation control structure 40 . or when it rotates in the first rotational direction in conjunction with the actuator of the elevation control structure 40, the middle sill 12 (and the part suspended below the middle sill 12 and not supported by the lower sill 14) Due to the gravity of the shield structure 16), a force in the second rotation direction opposite to the first rotation direction is always applied to the first rotation shaft 22, and the middle beam 12 naturally hangs down without interference. When the one-way clutch 50 is engaged and ready for transmission, the lift control structure 40 at this time can rotate the first rotating shaft 22 in the first rotating direction through the interlocking shaft 44, and at the same time, the second A first winding roll 24 installed on one rotary shaft 22 is rotated to unwind a first pulling cord 26 wound thereon. On the other hand, when the limitation of the latch of the elevation control structure 40 received by the interlocking shaft 44 is released, the weight of the partially shielding structure 16 not supported by the middle beam 12 and the lower beam 14 causes the first rotation shaft 22 to rotate for the first time. When rotating in the opposite second direction of rotation, it simultaneously rotates the first winding roll 24 installed on the first rotating shaft 22 to pull out the first pulling cord 26 wound thereon. At the same time, the unrestricted interlocking shaft 44 becomes free and is moved by the first rotating shaft 22 to rotate simultaneously and in the same direction as the first rotating shaft 22 .

As shown in FIGS. 4 and 5, the one-way clutch 50 for realizing the above operation of this embodiment includes an outer ring 52, an inner ring 54 and a plurality of rotating pillars 56, wherein the outer ring 52 and the inner ring 54 are The plurality of rotating posts 56 are installed between the outer ring 52 and the inner ring 54 in a relatively rotatable manner. More specifically, by having a polygonal hole for inserting the first rotating shaft 22 at one end of the outer ring 52 , the outer ring 52 can be interlocked with the first rotating shaft 22 , and the outer ring 52 An annular frame 52a is formed at the end. Since one end of the inner ring 54 has a polygonal hole for inserting the interlocking shaft 44, the inner ring 54 can be interlocked with the interlocking shaft 44, and the other end of the inner ring 54 is formed with a protruding column 54a. A plurality of ribs 54b are integrally formed on the periphery of 54a. As shown in FIG. 5, after the inner ring 54 and the outer ring 52 are mated, the protruding posts 54a of the inner ring 54 are located in the annular frame 52a of the outer ring 52 and are aligned with the inner surface of the annular frame 52a and every two adjacent ribs 54b. A plurality of wedge-shaped spaces S are formed between them, and the sizes of both ends of these wedge-shaped spaces S are different.

When the interlocking shaft 44 is restricted by the latch of the lift control structure 40 and cannot move, the inner ring 54 is also kept stationary, or the interlocking shaft 44 rotates in the first rotational direction in conjunction with the actuator of the lift control structure 40. , and when the inner ring 54 is moved to rotate in the same direction, due to the gravitational action of the middle beam 12 (and the partial shielding structure 16 suspended below the middle beam 12 and not supported by the lower beam 14) , a force is always applied to the first rotating shaft 22 in a second rotating direction opposite to the first rotating direction. abutting on the rib 54b near one end and closely contacting the inner surface of the annular frame 52a and the peripheral surface of the projecting post 54a, as shown in FIG. 54 and the outer ring 52, relative rotation of the inner ring 54 in the first direction of rotation and the outer ring 52 in the second direction of rotation cannot occur. The tendency of relative rotation of the outer ring 52 in the second direction of rotation is maintained with respect to the direction of rotation, whereby the one-way clutch 50 engages and becomes ready for transmission. That is, in this state, when the interlocking shaft 44 is restricted by the latch of the elevation control structure 40, the user pulls the control cord 42 to control the interlocking shaft 44, rotate it in the first rotation direction, and rotate it one way. The inner ring 54 and the outer ring 52 of the clutch 50 are transmitted to the first rotating shaft 22, and the first rotating shaft 22 is also rotated in the first rotating direction to achieve the purpose of rewinding the first pulling cord 26. Conversely, after the latch of the lift control structure 40 releases the restriction on the interlocking shaft 44 , the user can pull out the first pull cord 26 to achieve the purpose of deploying the shielding structure 16 .

As can be seen from the above, when the rotary column 56 is in contact with the relatively small rib 54b near one end of the wedge-shaped space S (as shown in FIG. 5), the one-way clutch 50 can be engaged and transmitted as described above. In this state, the inner ring 54 and the outer ring 52 of the one-way clutch 50 do not rotate relative to the inner ring 54 in the first rotation direction and the outer ring 52 in the second rotation direction. , means that interlocking occurs and is maintained between the first rotating shaft 22 and the interlocking shaft 44 . On the other hand, what is emphasized in the present invention is that the one-way clutch 50 is disengaged when the rotary column 56 is in contact with the rib 54b near the relatively large end of the wedge-shaped space S (that is, the other end of the wedge-shaped space S). In this state, the inner ring 54 and the outer ring 52 of the one-way clutch 50 are independently rotated in the second direction, or the outer ring 52 is rotated in the first direction. It means that the interlocking relationship between the first rotating shaft 22 and the interlocking shaft 44 is cut off because it can rotate toward. A situation in which the one-way clutch 50 is disengaged and the interlocked state is disconnected will be described later.

In addition, it should be noted that in the present invention, taking the first embodiment as an example, if the one-way clutch 50 is not necessarily combined with the pre-force unit 60, when the lower beam moves upward to push up the middle beam, the upper Since the pull cord located between the beam and the middle beam cannot be reliably unwound, the pre-force unit 60 will be described first.

According to the first embodiment of the present invention, the pre-force unit 60 can apply the driving force to the first rotating shaft 22 of the first winding set 20 in the second rotating direction. 6 and 7, the pre-force unit 60 of this embodiment includes a box 62, a shaft sleeve 64, an idler 66 and a spring 68 as structures for achieving the above objectives. Here, the box 62 is configured by combining one first shell 621 and one second shell 622 so as to be separable. A stop wall 621b protruding from the outer periphery of the through hole 621a in the inner surface of the first shell 621 is integrally formed, and a supporting portion is formed by protruding one protruding column 621c near the stop wall 621b. Both the shaft sleeve 64 and the idler 66 are cylindrical bodies, and each have a shaft hole 64a and a shaft hole 66a. However, the hole shape of the shaft hole 64a and the cross-sectional profile of the first rotating shaft 22 are matched, so that the shaft sleeve 64 and the first rotating shaft 22 can rotate simultaneously. A spring 68 is wound in an S-shape, extends between an axle sleeve 64 and an idler 66, and is connected at one end to said axle sleeve 64, where the portion of said spring 68 wound around the axle sleeve 64. is defined as the acting portion 68a, and the portion wound around the idler 66 is defined as the unwinding portion 68b. Accordingly, at the same time that the amount of winding of the first pulling cord 26 by the first winding roll 24 is changed, the number of windings of the acting portion 68a and the unwinding portion 68b is correspondingly changed, and the spring 68 is changed as described above. An unwinding pull force on the shaft sleeve 64 is accumulated or released, said unwinding pull force being the driving force as defined in the present invention.

In addition, the direction in which the unwinding tensile force (that is, the driving force) of the spring 68 and the gravity of the central beam 12 and the shield structure 16 are applied to the first winding roll 24 and the first rotating shaft 22 are opposite. , the unwinding tensile force tends to rotate the first winding roll 24 along with the first rotation axis 22 in the first direction of rotation, while the gravity of the beam 12 and the shield structure 16 causes the first winding roll 24 to rotate in the first direction. It tries to rotate in the second rotation direction together with the rotating shaft 22 . When the user manipulates the control cord 42 to lower the beam 12 (ie, when the latch of the lift control structure 40 releases the restraint on the interlocking shaft 44), the beam 12 unwinds the spring 68 and pulls it. , the unwinding tensile force of the spring 68 is set smaller than the gravity of the middle beam 12 (or part of the shielding structure 16 is added) to prevent the lift control structure 40 from being unable to descend due to its own gravity. The latch allows the first pull cord 26 to be pulled out smoothly when the restriction on the interlocking shaft 44 is released.

Referring again to FIG. 6, the assembly of the pre-force unit 60 will be described in more detail. The shaft sleeve 64 around which the spring 68 is already wound is installed within the range surrounded by the stop wall 621b, and at the same time the protruding column 621c is passed through the shaft hole 66a of the idler 66, and then the second shell 622 is inserted into the The first shell 621 is engaged and fitted so that the shaft sleeve 64 and the idler 66 can be rotatably positioned in the box 62 and the purpose of modularizing the pre-force unit 60 can be achieved.

After the first rotating shaft 22 of the first winding set 20 passes through one first winding roll 24, the through hole 621a of the first shell 621 of the preload unit 60, the shaft hole 64a of the shaft sleeve 64, the second It passes through the through hole 622a of the two shells 622 in turn, and then passes through another first winding roll 24, and then the one-way clutch 50 is matched and interlocked by the end. The pre-force unit 60 of this embodiment is finally mounted between the two first winding rolls 24, but may be mounted outside any one of the first winding rolls 24 if desired.

As can be seen from the above description, before a person pulls the control cord 42 to raise the lower beam 14 and the middle beam 12 is pushed up by the movement of the lower beam 14, the middle beam 12 is supported by the first pull cord 26. During this period, the first pull cord 26 is in a taut state due to the weight of the center beam 12 and the shielding structure 16 below it, and this Since the unwinding tensile force of the spring 68 is restrained by the weight, the unwinding tensile force becomes insufficient, and the shaft sleeve 64 cannot move the first rotating shaft 22 to rotate.

However, when a person consciously or unintentionally continues to pull the control cord 42 to continue moving the lower sill 14 upward, and the upward movement of the lower sill 14 pushes the middle sill 12 upward, the middle sill 12 It means that the weight of itself and the shielding structure 16 added to it has been offset by the lower beam 14 already moving upward, in other words, the unwinding tensile force of the spring 68 at this time is released without restraint. be. Although the interlocking shaft 44 is held in a non-rotatable state by the latch limitation of the lift control structure 40 , the unwinding tension force exerted by the spring 68 against the shaft sleeve 64 causes the first rotating shaft 22 and the first winding roll 24 to be separated from each other. rotates in the first rotation direction, the first rotating shaft 22 and the interlocking shaft 44 rotate relatively, and the outer ring 52 and the inner ring 54 interlocking with the first rotating shaft 22 and the interlocking shaft 44, respectively, also rotate relatively It rotates, and this relative rotation moves the rotary column 56 to come into contact with the relatively large rib 54b near the one end of the wedge-shaped space S, and the one-way clutch 50 is engaged from a state in which transmission is possible. It is converted to a state in which it is separated and interlocking is disconnected. Up to this point, the interlocking shaft 44 is still limited by the latch of the lift control structure 40, but at this time the inner ring 54 and the outer ring 52 of the one-way clutch 50 rotate independently, so that the unwinding pulling force provided by the spring 68 is immediately acts on the shaft sleeve 64 and moves the shaft sleeve 64 to rotate in the first rotation direction (that is, the rotation direction in which the first winding roll 24 unwinds the first pull cord 26), and the interlocking second The one rotating shaft 22 simultaneously rotates in the first rotating direction together with the first winding roll 24 to unwind the first pulling cord 26 . With such a mechanism, in the case of the conventional structure, the cord portion of the first pulling cord 26 positioned between the upper beam 10 and the middle beam 12 in this state is inconveniently loosened, which can be improved. In the structure of the present invention, when the middle beam 12 is pushed up by the bottom beam 14, the cord portion located between the top beam 10 and the middle beam 12 of the first pulling cord 26 can be immediately unwound, To keep the pull cord 26 taut, to maintain the overall aesthetics of the curtain, and to prevent damage to the curtain or possible catching on other objects due to exposure and tangling of the pull cord irreversible. can be reduced.

Having described the two-way openable curtain 100 of the first embodiment of the present invention, the disclosed pre-force unit 60 includes an S-shaped coiled spring 68, whose working portion 68a and unwinding portion 68b The number of turns changes as the first rotating shaft 22 rotates the shaft sleeve 64 to generate (accumulate) the driving force necessary to pull the shaft sleeve 64 to rotate. In practice, the structural form of the reserve force unit is not limited to the above, and may be at least the structure shown in FIGS. 8 to 10 or the structure shown in FIGS. 11 to 13, which will be described later.

FIG. 8 shows the relative positions of another preload unit 70 disclosed in the second embodiment of the present invention and the first winding set 20 and the second winding set 30 illustrated in the first embodiment. The pre-force unit 70 is also mounted between the two first winding rolls 24 in a similar manner to generate a driving force and provide a first winding free from the gravitational action of the center beam 12 (and the shield structure 16). The rotating shaft 22 is rotated. 9 and 10, the pre-force unit 70 includes a box 71, a fixed seat 72, a winding shaft 73, a shaft sleeve 74 and a spring 75. As shown in FIG. Here, the box 71 is configured by detachably combining one housing 711 and one side lid 712, has a relatively large storage space inside the housing 711, and has two side walls. has corresponding through holes 711a, and two annular storage tanks 712a are integrally formed on one side surface of the side lid 712. As shown in FIG. A fixed seat 72 is installed between the housing 711 and the side cover 712, and two opposite sides of the fixed seat 72 are integrally formed with one shaft seat 721 and one cylinder 722, respectively. has a receiving hole 721 a , a cylinder 722 constitutes a support defined in the present invention, and a fixed seat 72 further has a through hole 723 .

The winding shaft 73 of the pre-force unit 70 has one disk 73a and one rotating shaft 73b, and the rotating shaft 73b extends outward from the rotation center of the disk 73a. passes through the through hole 723 of the fixed seat 72 and is then fixedly connected to the first tooth portion 76 made of a bevel gear, so that the first tooth portion 76 is installed at one end of the winding shaft 73 and the The first tooth portion 76 is located on the side of the fixed seat 72 having the shaft seat 721 , and the disk 73 a is located on the side of the fixed seat 72 having the cylinder 722 . After the winding shaft 73 is fixedly connected to the first tooth 76, both can rotate simultaneously. The shaft sleeve 74 has a pipe portion 74a and a second tooth portion 74b connected to one end of the pipe portion 74a and formed by a bevel gear. A shaft hole 74c passing through the portion 74b is provided, and the tubular portion 74a of the shaft sleeve 74 is rotatably inserted into a receiving hole 721a of the shaft seat 721 of the fixed seat 72. As shown in FIG. The shaft sleeve 74 and the second tooth portion 74b can rotate simultaneously. The shaft sleeve 74 and the winding shaft 73 are rotatably installed in the box 71 at the same time by meshing the second tooth portion 74 b with the first tooth portion 76 .

The structure of the spring 75 is similar to the structure of the spring 68 in the first embodiment, and has an interlocking working portion 75a and a rewinding portion 75b. , one end of which is connected to the disk 73a, and the rewinding portion 75b is wound around the cylinder 722 of the fixed seat 72. The number of turns can be changed to generate (accumulate) a corresponding driving force to rotate the winding shaft 73 .

The axial sleeve 74 and the first tooth portion 76 of the modularized pre-force unit 70 are positioned in the accommodation space of the housing 711, and the action portion 75a and the unwinding portion 75b of the spring 75 are located on the side lid 712, respectively. located in the corresponding storage tank 712a. The first rotating shaft 22 passes through the through hole 711a of the housing 711 and the shaft hole 74c of the shaft sleeve 74, and the through hole 711a does not affect the rotation of the first rotating shaft 22, but the first rotating shaft 22 and the shaft hole The arrangement of 74c is likewise non-idling relative to each other. Thus, when the lower beam 14 pushes up the middle beam 12, the unwinding tensile force (i.e., driving force) provided by the spring 75 rotates the winding shaft 73 via the acting portion 75a, causing the winding to rotate. The shaft sleeve 74 is rotated by meshing transmission of the shaft 73 with the second tooth portion 74 b through the first tooth portion 76 . Similarly, the first rotating shaft 22 rotates simultaneously and in the same direction as the shaft sleeve 74 so that the first winding roll 24 unwinds the first pulling cord 26 and the central beam 12 (and the shielding structure 16 it bears). ) is offset by the rising lower beam 14, the tension of the cord portion located between the upper beam 10 and the middle beam 12 of the first pulling cord 26 can be maintained.

FIG. 11 is another pre-force unit 80 disclosed by the third embodiment of the present invention and the relative positions of the first winding set 20 and the second winding set 30 shown by the first embodiment. The pre-force unit 80 is likewise mounted between the two first winding rolls 24 to generate the driving force to the second winding unaffected by the gravity of the center beam 12 (and the shield structure 16). One rotating shaft 22 is rotated. 12 and 13, the pre-force unit 80 includes a box 82, an axle sleeve 84 and a spring 86. As shown in FIG. Here, the box 82 is configured by detachably combining one first shell 821 and one second shell 822. The first shell 821 and the second shell 822 have through holes 821a and 822a, respectively. and the hole shapes of the through holes 821a and 822a and the cross-sectional profile of the first rotating shaft 22 do not interfere with each other, and the first rotating shaft 22 can freely rotate in the through holes 821a and 822a. . A stopping wall 821b projecting from the outer peripheral edge of the through hole 821a on the inner surface of the first shell 821 is integrally formed, and the stopping wall 821b has a notch 821c. The shaft sleeve 84 includes a shaft tube 841 having a shaft hole 841a, a disk 842 integrally connected to the outer peripheral surface of the shaft tube 841, and a localization projection block 842a on one side of the disk 842. The spring 86 has a first end 86a and a second end 86b, the first end 86a being connected to the box 82 to form a fixed and immovable support point, and the second end 86b interlocking with the shaft sleeve 84. do. Referring to FIG. 14, the spring 86 of this embodiment is a spiral spring, which is partially wound around the shaft tube 841 and positioned within the area surrounded by the stopping wall 821b. The first end 86a is fitted into the notch 821c of the stop wall 821b and fixedly positioned, and the second end 86b of the spring 86 is curved and engages the positioning projection block 842a. Thus, the unwinding force accumulated by the spring 86 can continuously act on the shaft sleeve 84 .

The first rotating shaft 22 passes through the through hole 821a on the box 82, the shaft hole 841a and the through hole 822a, and the arrangement relationship between the first rotating shaft 22 and the shaft hole 841a is such that they still cannot idle. Thus, when the lower beam 14 pushes up the middle beam 12 to move, the unwinding tensile force (i.e. driving force) provided by the spring 86 directly moves the shaft sleeve 84 and the first rotating shaft 22, simultaneously In addition, it is rotated in the same direction, and the first pull cord 26 is rewound by the first winding roll 24 to achieve the purpose of preventing loosening.

As can be seen from the above, the present invention utilizes the unwinding tensile force provided by the springs 68, 75, 86 to the first rotating shaft 22 to cause the first rotating shaft 22 to rotate the first winding roll 24 to the first pulling cord. 26 is rotated in the first rotational direction for rewinding, and by the one-way clutch function of the one-way clutch 50, the one-way clutch 50 is engaged and held in a state where transmission is possible in a state in which the center sill 12 naturally hangs down. , the interlocking shaft 44 and the first rotating shaft 22 maintain a simultaneous operation relationship, and the user operates the lifting control structure 40 to cause the first winding roll 24 to rewind or pull out the first pulling cord 26, and It is advantageous to change the height of the beam 12 at will. The movement of the lower sill 14 further lifted the middle sill 12, and the gravity action on the first winding roll 24 and the first rotating shaft 22 was offset by the middle sill 12 and the shielding structure 16 suspended thereunder. At the same time, the driving force provided by the springs 68, 75, 86 causes the first rotating shaft 22 to rotate in the first rotating direction, and at the same time, the one-way clutch 50 disengages and changes to the non-transmissible state, so that the first rotating Disconnect the interlocking relationship between the shaft 22 and the interlocking shaft 44, ensure that the rotation of the first rotating shaft 22 is not restricted by the latch of the lifting control structure 40, and let the driving force act freely, The first winding roll 24 can unwind the first pulling cord 26 and keep the first pulling cord 26 from loosening.

For the above purpose, the structure of the preload units 60, 70, 80 of each embodiment is such that the springs 68, 75, 86 and the first rotating shaft 22 are stably and interlocked with each other, and the central sill 12 moves up and down. When manipulated by the control structure 40, the unwinding tension force can be accumulated or released accordingly, and the springs 68, 75, 86 are driven smoothly when the middle beam 12 is lifted by the bottom beam 14. output force. In addition, the different embodiments are also to meet different spatial arrangement needs of the upper beam 10 . Therefore, it should be understood that all means variations including any structural arrangement, fixation or molding having the same function are within the scope of equivalence. Also, whether the structure has an idler for winding the unwinding portions 68b, 75b of the springs 68, 75, or a space corresponding to the box is formed to limit the position of the unwinding portions 68b, 75b. It is the same as the one changed to The use of constant force springs or variable force springs for springs 68, 75, 86 is a design choice and is not limiting. Also, it should be understood that there are many types of one-way clutches that can achieve a one-way clutch action, and are not limited to the one-way clutch 50 disclosed in the above embodiment, and other commonly used one-way clutches are also within the technically equivalent range. belongs to

The above are only preferred embodiments of the present invention, and all equivalent changes made in the specification and claims of the present invention are intended to be within the scope of the present invention.

100 Two-way openable curtain 10 Upper beam 12 Middle beam 14 Lower beam 16 Shielding structure 20 First winding set 22 First rotating shaft 24 First winding roll 24a Polygonal hole 26 First pulling cord 30 Second winding set 32 Second rotating shaft 34 Second winding roll 34a Polygonal hole 36 Second pulling cord 40 Elevation control structure 42 Control cord 44 Interlocking shaft 5-5 Wire 50 One-way clutch 52 Outer ring 52a Annular frame 54 Inner ring 54a Protruding column 54b Rib 56 Rotating column 60 Preload unit 62 Box 621 First shell 621a Through hole 621b Stop wall 621c Protruding column 622 Second shell 622a Through hole 64 Shaft sleeve 64a Shaft hole 66 Idler 66a Shaft hole 68 Spring 68a Acting portion 68b Unwinding portion 7- 7 wire 70 preload unit 71 box 711 housing 711a through hole 712 side lid 712a storage tank 72 fixed seat 721 shaft seat 721a storage hole 722 cylinder 723 through hole 73 winding shaft 73a disc 73b rotating shaft 74 shaft sleeve 74a pipe portion 74b Second tooth portion 74c Shaft hole 75 Spring 75a Actuating portion 75b Unwinding portion 76 First tooth portion 80 Preload unit 82 Box 821 First shell 821a Through hole 821b Stop wall 821c Notch 822 Second shell 822a Through hole 84 Shaft sleeve 841 Axial tube 841a Axial hole 842 Disk 842a Orientation projection block 86 Spring 86a First end 86b Second end S Wedge-shaped space

Claims (8)

A two-way openable curtain,
upper beam and
a middle beam movably positioned below the upper beam;
a lower beam movably positioned below the middle beam;
a shielding structure installed between the middle sill and the lower sill;
an elevation control structure installed on the upper beam for operating and rotating the first rotating shaft or the second rotating shaft;
a preload unit installed on the upper beam and interlocking with the first rotating shaft;
a one-way clutch positioned between the first rotating shaft and the lift control structure;
The first rotating shaft rewinds or pulls out the first pull cord, one end of the first pull cord is fixed to the middle beam,
The second rotating shaft rewinds or pulls out the second pull cord, one end of the second pull cord is fixed to the lower beam,
When the lower beam pushes the middle beam upward and moves, the one-way clutch disconnects the first rotating shaft and the elevation control structure, and the pre-force unit applies driving force to the first rotating shaft. and wherein said driving force rotates said first rotating shaft and unwinds said first pull cord. 2. The two-way openable curtain of claim 1, wherein the pre-force unit includes a spring, and the spring is interlockably connected to the first rotating shaft to provide the driving force to the first rotating shaft. . said pre-force unit comprising an axial sleeve, said spring being connected to said axial sleeve;
wherein the first rotating shaft passes through the shaft sleeve and is installed in conjunction with the shaft sleeve;
3. The two-way openable curtain of claim 2, wherein said spring provides said driving force to said first rotating shaft by means of said shaft sleeve. said pre-force unit comprising a box, said shaft sleeve being rotatably mounted in said box;
4. The spring as set forth in claim 3, wherein said spring has a first end and a second end, said first end being connected to said box to form a fixed and immovable support point, and said second end interlocking with said axle sleeve. Two-way retractable curtains as described. said pre-force unit comprising a box, said shaft sleeve being rotatably mounted in said box;
the spring comprises an interlocking working part and a rewinding part, the rewinding part is located in the box, the working part is wound around the shaft sleeve, and one end is connected to the shaft sleeve;
4. The two-way openable curtain of claim 3, wherein said spring provides said driving force to said first rotating shaft by means of said shaft sleeve. the pre-force unit includes a box and a winding shaft, the winding shaft being rotatably installed in the box;
The spring includes an action part and a rewinding part, the rewinding part being located in the box,
the action part is wound around the winding shaft and one end is connected to the winding shaft;
a first toothed portion is installed at one end of the winding shaft, a second toothed portion is installed at one end of the shaft sleeve, and the first toothed portion and the second toothed portion are meshed;
4. The two-way open/close curtain of claim 3, wherein the spring is associated with the axial sleeve by the winding axle to provide the driving force to the first rotating axle. The two-way openable curtain according to claim 5 or 6, wherein a support is installed inside the box, and the unwinding part of the spring is wound around the support. wherein the two-way openable curtain includes an interlocking shaft;
one end of the interlocking shaft is connected to the elevation control structure;
The two-way openable curtain according to any one of claims 1 to 6, wherein both sides of said one-way clutch are aligned with said first rotating shaft and said interlocking shaft respectively.

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