A pull-rod type curtain operating mechanism and a curtain to which it is applied.

Abstract

The present invention provides a pull-rod type curtain operating mechanism that can withstand large torsional forces while remaining compact, and a curtain to which this mechanism is applied. [Solution] The pull-rod type curtain operating mechanism comprises a drive connector, a control lever, a lifting mechanism, a release mechanism, and an operating mechanism. The control lever comprises a fixed rod, a release rod, and a lifting operating member. The lifting mechanism comprises an annular rope wheel, a winding unit, and a driven member. When the lifting operating member extends relative to the release rod, the annular rope wheel and the driven member rotate synchronously in the positive rotational direction, causing the operating mechanism to transmit a torsional force to the roll bar and wind up the shielding material. When the release rod extends relative to the fixed rod, the driven member rotates the drive shaft of the operating mechanism in the negative rotational direction, releasing the engagement between the swing latch of the operating mechanism and the drive connector. At this time, the drive connector and the roll bar release the shielding material from the roll bar.

Description

Technical Field

[0001] The present invention relates to a drawbar-type curtain operating mechanism and a curtain to which the same is applied, and more particularly to a drawbar-type curtain operating mechanism that is small-sized, can withstand a large torsional force, has few restrictions in terms of appearance design, and can be applied to wide curtains, and a curtain to which the same is applied.

Background Art

[0002] Curtains are often used for adjusting lighting and ensuring privacy at openings of buildings such as windows and doors. Generally, curtains whose light-shielding area can be adjusted vertically can be divided into two forms depending on the curtain operating method: a curtain with an exposed operating cord and a curtain with a non-exposed operating cord. Among them, a curtain with an exposed operating cord is controlled to be deployed or folded by a circular control cord. By pulling both sides of the control cord downward by a user, the upward or downward movement of the light-shielding part of the curtain can be controlled respectively. However, the circular control cord may get tangled or wrapped, which can be troublesome.

[0003] Existing blinds have concealed operating cords, allowing the user to control the unfolding and folding of the curtain by operating an operating tube and a pull member at the bottom of the tube. When the curtain is folded, the user extends the operating tube to unfold the curtain downwards, and then repeatedly extends the hook member to fold the curtain upwards. However, such blinds have a large mechanism in the upper beam, which limits the overall appearance of the curtain. Furthermore, the only means of stopping the movement is to use a retaining spring to tighten and lock a hollow sleeve to prevent it from rotating due to the weight of the louvers, which limits the torsional force it can resist. Therefore, it cannot be used for wide curtains with heavy blackout sections. For this reason, the market is demanding a pull-rod type curtain with a thinner and smaller operating mechanism that can resist greater torsional forces and has fewer limitations on the applicable curtain width. [Overview of the project] [Problems that the invention aims to solve]

[0004] In view of the above-mentioned conventional problems, the present invention aims to provide a pull-rod type curtain operating mechanism and a curtain to which it is applied. The pull-rod type curtain operating mechanism can withstand large torsional forces while being miniaturized, thus reducing constraints on the overall appearance design of the curtain and making it applicable to wider curtains. Because the curtain has the pull-rod type curtain operating mechanism, there are fewer restrictions on the appearance design and width size selection. [Means for solving the problem]

[0005] According to the object of the present invention, a pull-rod type curtain operating mechanism and a curtain to which the same is applied are provided, the curtain having a roll bar and a shielding material having one end connected to the roll bar, and the pull-rod type curtain operating mechanism comprising a drive connector, a base, a control lever, a lifting mechanism, a release mechanism and an operating mechanism. The drive connector is fixed to one end of the roll bar, and when the drive connector rotates, the roll bar can rotate together with the drive connector. The inner wall surface of the drive connector has at least one first contact portion exhibiting a projection. The base is provided corresponding to the end of the roll bar to which the drive connector is connected. The control lever is provided below the base and comprises a fixed rod, a release rod and a lifting operating member. The fixed rod is fixed to the base, and the release rod is externally fitted below the fixed rod so as to be extendable relative to the fixed rod. Furthermore, the lifting operation member is connected below the unlocking rod so as to be extendable and retractable relative to the unlocking rod.

[0006] The lifting mechanism is located within the base and is configured to interlock with the lifting operating member of the control lever via a lifting cord. The lifting mechanism comprises an annular rope wheel, a winding unit, and a driven member. The annular rope wheel is rotatable in the axial direction of the roll bar and has a plurality of second contact portions that protrude on its inner circumferential surface. The winding unit is connected to the annular rope wheel and, when the force applied to the annular rope wheel is released, rotates the annular rope wheel to return it to its original position. The driven member has a plurality of teeth on its outer circumference and is located within the base coaxially with the annular rope wheel. The driven member comprises a plurality of elastic arms, each of which is configured to correspond positionally to a plurality of second contact portions. One end of the lifting cord is fixed to the annular rope wheel, and the other end extends from the base, is inserted into the control lever, and is fixed to the lifting operating member. When the lifting operation member receives force and extends relative to the unlocking rod, the lifting cord moves in accordance with the lifting operation member and rotates the annular rope wheel in the positive rotational direction.

[0007] The unlocking mechanism is provided within the base and is configured to interlock with the unlocking rod of the control lever via an unlocking cord. The unlocking mechanism includes a movable member that is movably disposed within the base. The movable member includes a pressing portion. One end of the unlocking cord is fixed to the movable member, and the other end extends from the base, is inserted into the control lever, and is fixed to the unlocking rod. When the unlocking rod is subjected to force and extends relative to the fixed rod, the unlocking cord moves together with the unlocking rod, thereby moving the movable member in a first direction, engaging the pressing portion of the movable member with a plurality of teeth provided on the outer circumference of the driven member, and rotating the driven member in a negative rotational direction.

[0008] The operating mechanism is connected between the lifting mechanism and the drive connector. The operating mechanism comprises a drive shaft and at least one swing latch. The drive shaft extends along the axial direction of the roll bar, with one end inserted into the drive connector and the other end fixed to the driven member so that the drive shaft follows the driven member and rotates together in the same direction. At least one of the swing latches is swingably provided between the drive shaft and the drive connector.

[0009] When the lifting operating member receives force and extends toward the unlocking rod, causing the annular rope wheel to rotate in the positive rotational direction, the plurality of elastic arms of the driven member engage with the plurality of second contact portions provided on the inner circumferential surface of the annular rope wheel, thereby causing the driven member to rotate in the positive rotational direction in synchronization with the annular rope wheel, and at the same time, the drive shaft of the operating mechanism rotates in synchronization with the positive rotational direction, and at least one of the swing latches engages with at least one of the first contact portions of the drive connector, thereby transmitting a torsional force to the roll bar and winding up the shielding material. Subsequently, when the force applied to the lifting operating member is released, the winding unit rotates the annular rope wheel in a negative rotational direction opposite to the positive rotational direction. When the annular rope wheel rotates in the negative rotational direction, the plurality of elastic arms of the driven member slide over the tops of the plurality of second contact portions, and the annular rope wheel is configured not to rotate together with the driven member.

[0010] On the other hand, when the unlocking rod receives force and extends relative to the fixed rod, causing the driven member to rotate in the negative rotational direction, the driven member rotates the drive shaft of the operating mechanism in sync with the negative rotational direction, thereby disengaging at least one of the swinging latches and preventing engagement with at least one of the first contact portions of the drive connector. At this time, the drive connector and the roll bar rotate freely relative to the drive shaft due to the weight of the shielding material, thereby allowing the shielding material to be deployed.

[0011] In one embodiment of the present invention, the unlocking mechanism further comprises a return spring provided between the base and the movable member. When the unlocking rod receives force and extends relative to the fixed rod, and the unlocking cord moves the movable member in the first direction, the return spring undergoes elastic deformation. Subsequently, when the force applied to the unlocking rod is released, the return spring provides the movable member with return elasticity, causing the movable member to return to its original position. During the return process, the pressing portion of the movable member slides over the tops of a plurality of teeth provided on the outer circumference of the driven member, and the movable member is configured not to rotate the driven member.

[0012] In one embodiment of the present invention, the movable member further comprises a main body and a pressing member, the main body having a groove and a locking edge, and the pressing member having a fixed end and an engaging end therewith. The fixed end is provided in the groove of the main body, and the engaging end is pivotable in a direction deviating from the fixed end after being subjected to force, but is restricted by the locking edge and cannot pivot in the direction opposite to the deviating direction when subjected to force in a stationary state. Preferably, the pressing portion of the movable member is located at the engaging end of the pressing member.

[0013] In another embodiment of the present invention, the pressing portion of the movable member is a rack structure, and the plurality of teeth of the rack structure are right-angle teeth.

[0014] In one embodiment of the present invention, the operating mechanism further comprises a sleeve. The sleeve is fitted onto the drive shaft and has an axial groove and at least one through groove. The drive shaft has a positioning rib, which is fitted into the axial groove and rotates the sleeve by contacting one of the groove walls on either side of the axial groove depending on different rotation directions of the drive shaft. The swing latch disengages from the first contact portion of the drive connector and becomes disengaged because the amount of rotation of the drive shaft when the driven member rotates it in the negative rotation direction is greater than the amount of rotation of the sleeve.

[0015] Preferably, the operating mechanism further comprises a retaining spring, and the base comprises a cylinder structure having a locking wall. The retaining spring is fitted onto the sleeve, with one end abutting against the locking wall of the cylinder structure and the other end abutting in such a manner that it is inserted into the axial groove and engages with the positioning rib of the drive shaft. When the swinging latch engages with the first contact portion of the drive connector, and the drive connector and the roll bar attempt to rotate in the negative rotational direction due to the weight of the shielding material, the retaining spring provides a restraining force to the roll bar.

[0016] In one embodiment of the present invention, the winding unit comprises a spring storage wheel and a spiral spring. The spring storage wheel is rotatably fitted onto the spring storage column of the base and is connected to the annular rope wheel, so that it can rotate together with the annular rope wheel. One end of the spiral spring is fixed to the spring storage column of the base, and the other end is fixed to the spring storage wheel, and the spiral spring is coiled with the spring storage column as its approximate axis. When the spring storage wheel rotates relative to the spring storage column, the spring storage wheel is tightened or loosened in accordance with the change in the rotation direction of the spring storage wheel. When the lifting operation member receives force and extends toward the unlocking rod and rotates the annular rope wheel in the positive rotation direction, the annular rope wheel gradually tightens the spiral spring by rotating the spring storage wheel in the energy storage direction. At this time, when the force applied to the lifting operation member is released, the spring storage wheel rotates in the opposite direction to the energy storage direction under the action of the rewinding elasticity of the spiral spring, causing the annular rope wheel to rotate in the negative rotation direction, and the spiral spring is gradually loosened by the spring storage wheel.

[0017] In one embodiment of the present invention, the driven member further comprises a main body and a plurality of support elastic sheets. Each of the plurality of elastic arms is elastically pivotable relative to the main body. The plurality of support elastic sheets are provided at positions corresponding to each of the plurality of elastic arms, ensuring that the plurality of elastic arms remain extended toward the plurality of second contact portions. This allows the plurality of elastic arms to contact the plurality of second contact portions in a manner that engages with each of them when the annular rope wheel is rotated in the positive rotational direction. One end of each support elastic sheet is integrally connected to the corresponding elastic arm, and the other end is in contact with the main body. Alternatively, one end of each support elastic sheet is integrally connected to the main body, and the other end is in contact with the corresponding elastic arm. [Effects of the Invention]

[0018] The pull-rod type curtain operating mechanism according to the present invention and the curtain to which it is applied have at least the following advantages in use.

[0019] 1) The pull-rod type curtain operating mechanism according to the present invention is compact and has a thin appearance, and when applied to a curtain, it can reduce constraints on the overall appearance design of the curtain.

[0020] 2) The operating mechanism of the pull-rod type curtain operating mechanism according to the present invention is equipped with a swing latch, and after the lifting operating member receives force and extends toward the unlocking rod, the swing latch engages with the first contact portion of the drive connector, so that the roll bar of the curtain can resist the downward tensile force due to the weight of the shielding material after the force applied to the lifting operating member is released, and is therefore maintained in a stationary state due to the engagement relationship between the operating mechanism and the drive connector. In the prior art, the hollow sleeve was tightened and locked by relying only on a retaining spring to prevent the hollow sleeve from rotating due to being pulled by the weight of the louvers, whereas the pull-rod type curtain operating mechanism according to the present invention is applicable to curtains with heavier shielding material, thus reducing the constraints on selecting the dimensions of the shielding material and width of the curtain to which it is applied.

[0021] The present invention will be described in detail below with reference to the drawings and specific embodiments, but these will not limit the present invention. [Brief explanation of the drawing]

[0022] [Figure 1] This is a partially exploded perspective view showing one embodiment of a pull-rod type curtain operating mechanism and a curtain to which the same is applied according to the present invention. [Figure 2] The curtain shown in Figure 1 is depicted with the shielding material and part of the upper beam omitted. [Figure 3] Figure 1 is an exploded perspective view of the pull-rod type curtain operating mechanism. [Figure 4]It is an exploded perspective view showing the draw-bar type curtain operating mechanism of FIG. 1 from another angle. [Figure 5] It is a top view of the draw-bar type curtain operating mechanism of FIG. 1. [Figure 6] It is a partial cross-sectional view taken along line A-A of FIG. 5. [Figure 7] It is a partial cross-sectional view taken along line B-B of FIG. 5. [Figure 8] It is a partial cross-sectional view taken along line A-A of FIG. 5. [Figure 9] It is a schematic diagram showing the operation of the lifting mechanism of the draw-bar type curtain operating mechanism. [Figure 10] It is a schematic cross-sectional view of the driven member of the draw-bar type curtain operating mechanism according to another embodiment of the present invention. [Figure 11] It is a cross-sectional view taken along line C-C of FIG. 5. [Figure 12] It is a cross-sectional view taken along line D-D of FIG. 5. [Figure 13] It is a partial cross-sectional view taken along line E-E of FIG. 5. [Figure 14] It is a schematic diagram showing the operation of the operating mechanism of the draw-bar type curtain operating mechanism. [Figure 15] It is a partial enlarged view of the draw-bar type curtain operating mechanism of FIG. 1, shown with the first casing omitted. [Figure 16] It is a schematic diagram showing the operation of the unlocking mechanism of the draw-bar type curtain operating mechanism. [Figure 17] It is a perspective view showing the main body of the moving member of the unlocking mechanism of FIG. 15. [Figure 18] It is a partial enlarged view of the draw-bar type curtain operating mechanism according to another embodiment of the present invention, shown with the first casing omitted.

Mode for Carrying Out the Invention

[0023] The technical content and features of the present invention will be described in detail below with reference to the drawings, with reference to several embodiments. Referring to Figures 1 and 2, in the first embodiment of the present invention, a pull-rod type curtain operating mechanism 100 is applied to a curtain 200. The curtain 200 has an upper beam 220, a roll bar 240 and a shielding material 260. The upper beam 220 is substantially rectangular in shape and houses the roll bar 240 inside. The roll bar 240 extends along an axis A1 and is rotatable about the axis A1 in a positive rotation direction D1 and in the opposite negative rotation direction D2. The curtain operating mechanism 100 is provided at one end of the roll bar 240. The upper beam 220 comprises two fixing brackets 222, two upper beam side covers 224, and one plate 226. Each fixing bracket 222 is substantially L-shaped, with its shorter side facing upward and fixed to the plate 226, and its longer side positioned perpendicular to the horizontal plane of the building and fixedly connected to the curtain operating mechanism 100 and the roll bar 240. More specifically, the short sides of the two fixing brackets 222 are fitted into both ends of the plate 226, the long side of one of the two fixing brackets 222 engages with a locking device inserted into a locking groove 110 provided in the base 1 of the curtain operating mechanism 100, and the long side of the other fixing bracket 222 engages with the other end of the roll bar 240 that does not have the curtain operating mechanism 100, and the plate 226 is fixed to the horizontal surface of the building, thereby supporting and fixing the curtain operating mechanism 100 and the roll bar 240. The two upper beam side covers 224 each cover the two fixing brackets 222, thereby improving the decorative appearance of the entire upper beam 220.

[0024] Here, rotation of a part around axis A1 in the positive rotational direction D1 is defined as "rotation in the positive rotational direction," and rotation of a part around axis A1 in the negative rotational direction D2 is defined as "rotation in the negative rotational direction." All subsequent explanations will follow these definitions, and redundant explanations will be omitted.

[0025] In this embodiment, the roll bar 240 is a tubular material made by aluminum extrusion molding, and hollow protruding columns extend vertically from its inner circumferential surface to form a non-circular inner circumferential edge. One end of the shielding material 260 is fixed to the roll bar 240. When the roll bar 240 rotates about the axis A1, the shielding material 260 is wound onto the roll bar 240 or released from the roll bar 240, thereby achieving the folding and unfolding of the curtain 200.

[0026] Referring to Figures 2 to 4, the curtain operating mechanism 100 comprises the base 1, a control lever 2, a drive connector 3, a lifting mechanism 4, an operating mechanism 5, and a lock release mechanism 6. The base 1 consists of a first casing 11 and a second casing 12 that are linked and locked together. The first casing 11 has a support shaft 111 extending along the axis A1. The second casing 12 has a shaft column 121 and a cylinder structure 122, the shaft column 121 located on the side of the second casing 12 facing the first casing 11, and the cylinder structure 122 located on the side of the second casing 12 opposite to the first casing 11 and extending away from the first casing 11, with a locking wall 1221 at the extended end of the cylinder structure 122. When the first casing 11 and the second casing 12 are placed together, a housing space is formed between the first casing 11 and the second casing 12, and the lifting mechanism 4, the operating mechanism 5, and the unlocking mechanism 6 are housed in the housing space.

[0027] Referring to Figures 1 and 2, as well as Figures 5 and 6, the control lever 2 is located below the base 1 and comprises a fixed rod 21, a release rod 22, a lifting / lowering operating member 23, and a universal joint 24. The fixed rod 21 is hollow and tubular, and its upper end is connected to the base 1 via the universal joint 24, thereby allowing the fixed rod 21 to swing or rotate relative to the base 1. The release rod 22 is hollow and tubular and is inserted through the fixed rod 21, with at least a portion of the release rod 22 extending from below the fixed rod 21, and the release rod 22 is extendable and retractable relative to the fixed rod 21. The lifting operation member 23 is also tubular and is inserted through the unlocking rod 22, with at least a portion of the lifting operation member 23 extending from below the unlocking rod 22, and the lifting operation member 23 is extendable and retractable relative to the unlocking rod 22. In this embodiment, the fixed rod 21, the unlocking rod 22, and the lifting operation member 23 are stacked sequentially from the outside to the inside, but in other embodiments of the present invention, it is possible to change to a different mounting configuration, and in order for the user to grasp and operate it, it is necessary to be able to contact at least a portion of the unlocking rod 22 and the lifting operation member 23 from the outside. In other embodiments of the present invention, the lifting operation member may be in a more ergonomically designed shape, as long as it is connected below the unlocking rod in a manner that allows it to extend and retract relative to the unlocking rod.

[0028] Referring to Figures 2 to 4, the drive connector 3 is generally cylindrical in shape and has a plurality of axially extending convex ribs 31 on its outer circumferential surface. As shown in Figure 2, the plurality of convex ribs 31 of the drive connector 3 are locked and fixed to the inner circumferential edge of the roll bar 240. In this way, the drive connector 3 is fixedly connected to one end of the roll bar 240. In this configuration, when the drive connector 3 rotates, the roll bar 240 follows and rotates together with the drive connector 3. As shown in Figure 3, the inner wall surface of the drive connector 3 further has a plurality of first contact portions 32 that protrude inward (only one of them is shown). Referring also to Figure 7, in this embodiment, when the first casing 11 and the second casing 12 are combined, the support shaft 111 of the first casing 11 protrudes from the locking wall 1221 of the cylinder structure 122 of the second casing 12, the cylindrical drive connector 3 is fitted onto the cylinder structure 122, and one end of the support shaft 111 that protrudes from the locking wall 1221 of the cylinder structure 122 further extends outside the drive connector 3. Preferably, a washer 300 made of abrasion-resistant material is provided between the drive connector 3 and the cylinder structure 122.

[0029] In this embodiment, the curtain 200 is a roller blind, but the curtain operating mechanism of the present invention is also applicable to other types of curtains such as blinds, Roman shades, and honeycomb shades. In another embodiment of the present invention, the curtain operating mechanism is applied to a blind, and the roller bar is used to fold or unfold the curtain body relative to the roller bar by winding or releasing a lifting cord connected to the lower end of the curtain body. In yet another embodiment of the present invention, the curtain operating mechanism is applied to a blind, and the roller bar of the blind is a solid shaft, and the folding and unfolding of the blind is achieved by winding or releasing a lifting cord in accordance with the winding shaft. The drive connector has a non-circular hole (not shown), and the solid shaft has a non-circular cross-section and is inserted into and connected to the non-circular hole of the drive connector so that the solid shaft cannot rotate relative to the drive connector. Furthermore, by inserting a pin at the overlapping position of the solid shaft and the drive connector, the solid shaft can be prevented from moving axially relative to the drive connector. As a result, the drive connector is fixedly connected to one end of the solid shaft, and when the drive connector rotates, it causes the solid shaft to rotate along with the drive connector.

[0030] Referring also to Figures 3 to 7, the lifting mechanism 4 is provided within the housing space of the base 1 and comprises an annular rope wheel 41, a winding unit 42, and a driven member 43. The annular rope wheel 41 is rotatable about the axis A1 and has a plurality of second contact portions 411 projecting inward on its inner circumferential surface. At the same time, as shown in Figure 4, an annular groove 412 is formed on the outer circular arc surface of the annular rope wheel 41 by radially inward recesses, and the outer circumference of the annular rope wheel 41 has teeth. The lifting mechanism 4 is configured to interlock with the lifting operating member 23 of the control lever 2 via a lifting cord 120. More specifically, one end 1201 of the lifting cord 120 is fixed to the annular rope wheel 41, and at least a portion of the lifting cord 120 is wound into the annular groove 412. The other end of the lifting cord 120, relative to the one end 1201, extends from the housing space of the base 1 and is inserted into the control lever 2, and is finally fixedly connected to the first end plug 231 of the lifting operating member 23. The lifting cord 120 is kept under tension. In this way, when the lifting operating member 23 is subjected to force and extends toward the unlocking rod 22, the lifting cord 120 moves in accordance with the lifting operating member 23, thereby rotating the annular rope wheel 41 in the positive direction.

[0031] Referring together to Figures 3, 4, 7, and 8, the winding unit 42 is connected to the annular rope wheel 41 and plays the role of storing unwinding elasticity when the annular rope wheel 41 is subjected to force and rotates, and releasing the unwinding elasticity after the force applied to the annular rope wheel 41 is released, thereby causing the annular rope wheel 41 to rotate in the reverse direction and return to its original position. The winding unit 42 comprises a spring storage wheel 421 and a spiral spring 422. The spring storage wheel 421 consists of a cylindrical wheel body and a toothed disc, the toothed disc engaging with the toothed outer surface of the annular rope wheel 41 and having an axial hole. The spring storage wheel 421 is fitted onto the spring storage column 112 of the first casing 11 of the base 1 via the axial hole and is rotatable relative to the spring storage column 112. The spiral spring 422 is housed within the cylindrical wheel body of the spring storage wheel 421. As shown in Figure 8, one end of the spiral spring 422 is locked and fixed to the cylindrical wheel body of the spring storage wheel 421, and the other end is fixed to the spring storage column 112 of the first casing 11 of the base 1. The spiral spring 422 is coiled with the spring storage column 112 as its axis and can be tightened or loosened in accordance with changes in the rotation direction of the spring storage wheel 421, thereby storing and releasing the unwinding elasticity. The driven member 43 comprises a body 431 and a plurality of elastic arms 432. The body 431 is arranged in the base 1 coaxially with the annular rope wheel 41 and has a plurality of teeth 4311 on its outer circumference. The multiple elastic arms 432 are arranged on the main body 431, each being elastically pivotable relative to the main body 431, and are positioned to correspond to the multiple second contact portions 411 provided on the inner circumferential surface of the annular rope wheel 41, as shown in Figure 8.

[0032] Referring again to Figures 6, 8, and 9, when the lifting operation member 23 receives force and extends toward the unlocking rod 22, the lifting cord 120 is pulled, causing the annular rope wheel 41 to rotate in the positive rotational direction. As a result, the multiple elastic arms 432 of the driven member 43 are locked to the multiple second contact portions 411 provided on the inner circumferential surface of the annular rope wheel 41, as shown in Figure 8. Subsequently, as the annular rope wheel 41 rotates in the positive rotational direction, the driven member 43 rotates in sync with the annular rope wheel 41, following the annular rope wheel 41, and the spring storage wheel 421 continues to rotate in the energy storage direction D3 following the annular rope wheel 41, thereby gradually tightening the spiral spring 422 and accumulating unwinding elasticity. At this time, when the force applied to the lifting operation member 23 is released, the spiral spring 422 releases its unwinding elasticity, causing the spring storage wheel 421 to rotate in the opposite direction to the energy storage direction D3, thereby rotating the annular rope wheel 41 in the negative rotation direction and returning it to its original position, and the spiral spring 422 is gradually loosened in the spring storage wheel 421. When the annular rope wheel 41 rotates in the negative rotation direction, the multiple elastic arms 432 of the driven member 43 slide over the tops of the multiple second contact portions 411, and as shown in Figure 9, at this time the annular rope wheel 41 does not rotate together with the driven member 43.

[0033] Referring to Figures 8 and 9, in this embodiment, the driven member 43 further comprises a plurality of support elastic sheets 433. Each of the plurality of support elastic sheets 433 is positioned corresponding to a plurality of elastic arms 432, with one end of each support elastic sheet 433 integrally connected and fixed to the corresponding elastic arm 432, and the other end being a free end that abuts against the main body 431. In this configuration, the plurality of support elastic sheets 433 ensure that when the annular rope wheel 41 rotates in the negative rotation direction, each elastic arm 432 slides over the tops of the plurality of second contact portions 411 and then returns to and is maintained in a state extending toward the plurality of second contact portions 411, so that it can effectively engage with each of the second contact portions 411 when the annular rope wheel 41 rotates in the positive rotation direction.

[0034] Referring to Figure 10, in another embodiment of the present invention, one end of each of the plurality of support elastic sheets 433' of the driven member 43' is integrally connected and fixed to the main body 431, and the other end is a free end that abuts against the corresponding elastic arm 432. This ensures that the plurality of support elastic sheets 433' also return to a state in which each elastic arm 432 slides over the tops of the plurality of second contact portions 411 and then extends toward the plurality of second contact portions 411 when the annular rope wheel 41 rotates in the negative rotation direction, while at the same time ensuring that the annular rope wheel 41 can be effectively locked onto each of the second contact portions 411 when it rotates in the positive rotation direction.

[0035] Returning to Figures 3, 4, and 7, and also referring to Figures 11 to 13, the operating mechanism 5 is connected between the lifting mechanism 4 and the drive connector 3, and comprises a drive shaft 51, a plurality of swing latches 52, a sleeve 53, and a retaining spring 54. As shown in Figure 4, the drive shaft 51 has a positioning rib 511 and a plurality of locking blocks 512. At the same time, the body 431 of the driven member 43 further comprises a plurality of engagement blocks 4312 that extend toward the plurality of locking blocks 512 of the drive shaft 51. As shown in Figures 7 and 11, the plurality of locking blocks 512 engage with the plurality of engagement blocks 4312, so that one end of the drive shaft 51 is locked and fixed to the driven member 43, and the other end extends along the axis A1 and is inserted into the drive connector 3. When the driven member 43 rotates, the drive shaft 51 follows the driven member 43 and rotates in the same direction in synchronization with the driven member 43. As shown in Figure 13, a plurality of the swing latches 52 are swingably provided between the drive shaft 51 and the drive connector 3, and one end of each swing latch 52 is pivotably fitted into a groove on the drive shaft 51 and abuts against it. The sleeve 53 is fitted onto the drive shaft 51. As shown in Figure 3, an axial groove 531 is provided at one end of the sleeve 53 that is fitted onto the drive shaft 51, and a plurality of through grooves 532 are provided at the other end. As shown in Figures 7, 12, and 13, when the sleeve 53 is fitted onto the drive shaft 51, the positioning rib 511 of the drive shaft 51 is fitted into the axial groove 531. When the drive shaft 51 rotates in different directions, the positioning rib 511 rotates the sleeve 53 by contacting one of the groove walls on either side of the axial groove 531. Because the circumferential width of the positioning rib 511 is slightly smaller than the circumferential width of the axial groove 531 and they do not perfectly match, when the drive shaft 51 rotates in different directions, there is initially a small amount of play, and then the positioning rib 511 comes into contact with the other groove wall on either side of the axial groove 531.This play allows the multiple swing latches 52 to follow the rotation of the drive shaft 51 in different directions, extending from their respective through grooves 532 and contacting the first contact portion 32 of the drive connector 3, or being fitted into the corresponding through grooves 532 without contacting the first contact portion 32. The retaining spring 54 is fitted onto the sleeve 53, with one end contacting the locking wall 1221 of the cylinder structure 122, and the other end being inserted into the axial groove 531 and in contact with the positioning rib 511 of the drive shaft 51 in a manner that it engages with.

[0036] Referring to Figures 15 to 17, as well as Figure 6, the unlock mechanism 6 is provided within the base 1 and is linked to the unlock rod 22 of the control lever 2 via the unlock cord 140. As shown in Figure 15, the unlock mechanism 6 comprises a movable member 61, a return spring 62, and an auxiliary spring 63. The movable member 61 comprises a main body 611 and a pressing member 612. As shown in Figure 17, the main body 611 has a groove 6111, a locking edge 6112, a flexible portion 6113, a protruding fixed portion 6114, a cord hole 6115, and a second contact surface 6116. Referring to Figures 15 to 17, one end of the unlock cord 140 is inserted into the cord hole 6115 of the main body 611 and fixed in a manner that forms a knot 141. The pressing member 612 has a fixed end FE and an engaging end EE therewith. The fixed end FE is fitted into the groove 6111 of the main body 611, thereby allowing the pressing member 612 to pivot relative to the main body 611 with the fixed end FE as its axis. When the pressing member 612 is stationary and not subjected to any force, it contacts the locking edge 6112. At this time, if a force is applied to the pressing member 612 in a direction away from the locking edge 6112, the engaging end EE of the pressing member 612 pivots in a bias direction D4 relative to the fixed end FE. When the pressing member 612 rotates in the deviation direction D4, the engaging end EE presses against the flexible portion 6113, causing it to elastically deform. Then, when the force applied to the pressing member 612 is released, the flexible portion 6113 releases its elastic force, causing the pressing member 612 to rotate and return to a position where it abuts against the locking edge portion 6112.

[0037] Referring together to Figures 6 and 15, the end of the unlocking cord 140 fixed to the movable member 61 extends from the cord hole 6115 of the main body 611, bypasses the arcuate surface of the shaft column 121, extends further downward from the base 1 and is inserted into the control lever 2, and finally is fixedly connected to the second end plug 221 of the unlocking rod 22. The unlocking cord 140 is kept taut. In this way, when the unlocking rod 22 is subjected to force and extends relative to the fixed rod 21, the unlocking cord 140 moves in accordance with the unlocking rod 22, moving the movable member 61 in the first direction D5.

[0038] Continuing with Figures 15 to 17, and also referring to Figures 4, 8, and 9, the lower end of the return spring 62 is fitted and fixed to the fixing column 113 of the first casing 11, and the upper end is fitted and fixed to the protruding fixing portion 6114 of the main body 611 of the movable member 61, as shown in Figure 17. The auxiliary spring 63 is fitted onto the unlocking cord 140, and as shown in Figure 17, its upper end abuts against the second contact surface 6116 of the main body 611 of the movable member 61, and its lower end is reduced in diameter and abuts against the knot 141 of the unlocking cord 140. When the unlocking rod 22 extends relative to the fixed rod 21 and moves the movable member 61 in the first direction D5, the pressing portion of the movable member 61 engages with the plurality of teeth 4311 provided on the outer circumference of the body 431 of the driven member 43, thereby rotating the driven member 43 in the negative rotational direction. At the same time, as the movable member 61 moves, the length of the return spring 62 is extended, accumulating return elasticity. In this embodiment, the pressing portion of the movable member 61 is the engaging end EE of the pressing member 612. Subsequently, when the force applied to the unlocking rod 22 is released, the return spring 62 provides the return elasticity to the movable member 61, thereby moving the movable member 61 in the opposite direction to the first direction D5 and returning it to its original position. The auxiliary spring 63 can prevent the movable member 61 from moving excessively in the opposite direction to the first direction D5, thus contributing to the accurate return of the movable member 61 to its original position. During the return process of the movable member 61, the engaging end EE of the pressing member 612 of the movable member 61 slides over the tops of the multiple teeth 4311 provided on the outer circumference of the main body 431 of the driven member 43, or does not contact the multiple teeth 4311, and in this case the movable member 61 is configured not to rotate the driven member 43.

[0039] Referring to Figure 18, in yet another embodiment of the present invention, the driven member 43a of the pull-rod type curtain operating mechanism 100a has a plurality of teeth 4311a on the outer circumference of the body 431a, and the plurality of teeth 4311a are ratchet teeth. The movable member 61a of the unlocking mechanism 6a comprises a body 611a and a rack structure 612a, one end of the unlocking cord 140 is inserted into the body 611a and fixed in such a way that it forms a knot, and the plurality of teeth provided on the rack structure 612a are right-angle teeth. In this embodiment, the pressing portion of the movable member 61a is the rack structure 612a, and both ends of the return spring 62a are in contact with a fixing part (not shown) provided on the base of the pull-rod type curtain operating mechanism 100a and the contact surface 6111a of the body 611a of the movable member 61a. When the control lever 2 of the pull-rod type curtain operating mechanism 100a is operated and the unlocking rod (not shown) receives force and extends relative to the fixed rod, the moving member 61a moves in the first direction D5a by the unlocking cord 140, causing the pressing portion of the moving member 61a (i.e., the rack structure 612a) to engage with the plurality of teeth 4311a provided on the outer circumference of the body 431a of the driven member 43a, causing the driven member 43a to rotate in the negative rotation direction. At the same time, the length of the return spring 62a is shortened to store return elasticity. Subsequently, when the force applied to the unlocking rod (not shown) is released, the return spring 62a imparts the return elasticity to the moving member 61a, causing the moving member 61a to move in the opposite direction to the first direction D5a and return to its original position. During the return process, the rack structure 612a of the moving member 61a either slides over the tops of the multiple teeth 4311a provided on the outer circumference of the main body 431a of the driven member 43a, or does not come into contact with the multiple teeth 4311a, and at this time the moving member 61a is configured not to rotate the driven member 43a.

[0040] The following describes in detail the method of operating the curtain 200 of the present invention and the operating process of the corresponding parts. Referring together to Figures 1 to 7 and Figures 11 and 12, the user can fold up the curtain 200 by repeatedly pulling the lifting operation member 23 downwards. Each time the user pulls the lifting operation member 23 outward from the initial position to the extended position relative to the unlocking rod 22, the lifting operation member 23 rotates the annular rope wheel 41 in the positive rotational direction via the lifting cord 120, causing the plurality of elastic arms 432 of the driven member 43 to contact the plurality of second contact portions 411 provided on the inner circumferential surface of the annular rope wheel 41, as shown in Figure 12, thereby rotating the driven member 43 in the positive rotational direction in synchronization with the annular rope wheel 41, and rotating the drive shaft 51 in the positive rotational direction in synchronization, causing the plurality of swinging latches 52 to extend from the through groove 532 and engage with the plurality of first contact portions 32 of the drive connector 3. In this case, the rotation of the annular rope wheel 41 in the positive rotational direction D1 sequentially transmits a torsional force in the same direction to the roll bar 240 via the driven member 43, the drive shaft 51, and the drive connector 3. Under the action of the torsional force, the roll bar 240 rotates and winds up at least a portion of the shielding material 260.

[0041] When the biasing force applied by the user is released, the winding unit 42 rotates the annular rope wheel 41 in the negative rotational direction to return it to its original position, thereby rewinding a portion of the lifting cord 120 that had previously been released from the annular rope wheel 41 onto the annular groove 412 of the annular rope wheel 41, thereby returning the lifting operation member 23 from the extended position to the initial position relative to the unlocking rod 22. At the same time, the driven member 43 and the drive shaft 51 stop rotating.

[0042] As shown in Figures 1, 2, 7, and 12, when the drive shaft 51 rotates in the positive rotational direction, the retaining spring 54 is locked to one end of the positioning rib 511 and moves together with the positioning rib 511, thereby reducing the radius of the portion of the retaining spring 54 fitted onto the sleeve 53, allowing it to follow the sleeve 53 and rotate together with it. At the same time, the rotation of the sleeve 53 can rotate the drive connector 3, and furthermore, the roll bar 240 is rotated to wind up a portion of the shielding material 260. When the drive shaft 51 stops rotating after the biasing force by the user is released, the drive connector 3 and the roll bar 240 rotate slightly in the negative rotation direction D2 due to the weight of the shielding material 260. As a result, one end of the retaining spring 54 that is locked to one end of the positioning rib 511 is pressed, and the radius of the portion of the retaining spring 54 fitted onto the sleeve 53 is increased. This increases the frictional force between the retaining spring 54 and the cylinder structure 122, thereby providing a restraining force to the roll bar 240 through the engagement relationship between the multiple swing latches 52 and the first contact portion 32, and contributing to maintaining the roll bar 240 in a stationary state.

[0043] By repeating the above operations, the user can intermittently apply a torsional force in the positive rotational direction D1 to the roll bar 240 until the lower edge of the shielding material 260 reaches the user's desired height, or until the shielding material 260 is completely wound onto the roll bar 240 and the curtain 200 is completely folded, thereby winding at least a portion of the shielding material 260 upward.

[0044] Referring to Figures 14 to 16 in addition to Figures 1 to 6, the user can deploy the curtain 200 of the present invention by pulling the unlocking rod 22 downward. When the user pulls the unlocking rod 22 out relative to the fixed rod 21, the unlocking rod 22 moves the movable member 61 in the first direction D5 via the unlocking cord 140, thereby engaging the pressing portion of the movable member 61 (i.e., the pressing member 612) with the plurality of teeth 4311 provided on the outer circumference of the body 431 of the driven member 43, and rotating the driven member 43 in the negative rotational direction, and further rotating the drive shaft 51 in sync with the negative rotational direction. Because the circumferential width of the positioning rib 511 of the drive shaft 51 is smaller than the circumferential width of the axial groove 531, as shown in Figure 14, the multiple swing latches 52 are each rotated to a retracted position where they do not extend out of the through groove 532 by an amount of rotation greater than the amount of rotation of the sleeve 53. As a result, the multiple swing latches 52 disengage from the multiple first contact portions 32 of the drive connector 3 and become unengaged. At this time, the drive connector 3 and the roll bar 240 can rotate relative to the drive shaft 51 of the operating mechanism 5 under the weight of the shielding material 260, releasing the shielding material 260 downward.

[0045] Preferably, the curtain 200 further includes a damper attached to the end of the roll bar 240 opposite to the end fixed to the drive connector 3, and more preferably, the damper is a unidirectional damper that applies a damping force to the roll bar 240 when the roll bar 240 rotates under the weight of the shielding material 260, thereby reducing the rotational speed of the roll bar 240 and causing the lower edge of the shielding material 260 to descend slowly, thus enabling the curtain 200 to unfold slowly.

[0046] In this embodiment, when the biasing force on the unlocking rod 22 is released by the user, the return spring 62 applies the return elasticity to the moving member 61, thereby moving the moving member 61 in the direction opposite to the first direction D5 and returning it to its original position via the unlocking cord 140. Because the moving member 61 does not rotate the driven member 43 during the return process, the multiple swinging latches 52 remain disengaged from the multiple first contact portions 32 of the drive connector 3, and the roll bar 240 continues to rotate until the shielding material 260 is fully deployed. In other words, the shielding material 260 can be fully deployed by the user pulling the unlocking rod 22 downward once. In some other embodiments of the present invention, once the biasing force on the unlocking rod by the user is released, the moving member rotates the driven member in the positive rotational direction during the return process, causing the plurality of the swinging latches of the operating mechanism to swing until they extend from the retracted position and engage with the plurality of the first contacts of the drive connector, thereby stopping the rotation of the roll bar and temporarily suspending the release of the shielding material. This allows the user to release the shielding material intermittently in several stages.

[0047] The above are merely embodiments of the present invention, and equivalent modifications made without departing from the specification and claims of the present invention should be included in the claims of the present invention.

[0048] Of course, the present invention may have various other embodiments, and a person skilled in the art could make various corresponding modifications and variations without departing from the spirit and essence of the invention, but these corresponding modifications and variations should be within the scope of protection of the claims of the present invention. [Explanation of symbols]

[0049] 100,100a: Pull-rod type curtain operating mechanism 110: Locking groove 120: Lifting cord 1201: One end 140: Unlock code 141: Knot 200: Curtains 220: Upper beam 222: Fixing bracket 224: Upper beam side cover 226: Plate 240: Roll bar 260: Shielding material 300: Washer 1: Bass 11: First casing 111: Support shaft 112: Spring storage support 113: Fixed pillar 114: First contact surface 12: Second casing 121: Axial column 122: Cylinder structure 1221: Section Wall 2: Control lever 21: Fixed rod 22: Unlock rod 221: Second end plug 23: Lifting and lowering operation member 231: First end plug 24: Flexible joint 3: Drive connector 31: Convex ribs 32: First contact part 4: Lifting mechanism 41: Circular Rope Wheel 411: Second contact section 412: Ring groove 42: Winding Unit 421: Spring storage wheel 422: Spiral spring 43, 43', 43a: Driven members 431,431a: Main unit 4311, 4311a: Teeth 4312: Engagement block 432: Elastic Arm 433,433': Support elastic sheet 5: Operating mechanism 51: Drive shaft 511: Positioning rib 512: Locking block 52: Oscillating latch 53: Sleeves 531: Axial groove 532: Through groove 54: Retaining spring 6,6a: Unlock mechanism 61,61a: Movable member 611, 611a: Main unit 6111: Groove 6111a: Contact surface 6112: Locking edge 6113:Flexible part 6114:Protruding fixed part 6115: Cable hole 6116: Second contact surface 612a: Rack structure 612: Pressing member 62,62a: Return spring 63: Auxiliary spring A1: Axis line D1: Positive rotation direction D2: Negative rotation direction D3: Energy storage direction D4: Biasing direction D5, D5a: First direction EE: Engaging end FE:Fixed end

Claims

1. The curtain is operated by a pull-rod type curtain operating mechanism that is applied to a curtain and operates the opening and closing of the curtain, and the curtain has a roll bar and a shielding material connected to the roll bar, The aforementioned pull-rod type curtain operating mechanism comprises a drive connector, a base, a control lever, a lifting mechanism, a lock release mechanism, and an operating mechanism. The drive connector is fixed to one end of the roll bar so that the roll bar can rotate together with the drive connector, and its inner wall surface has at least one first contact portion. The base is provided corresponding to the end of the roll bar, The control lever is provided below the base and comprises a fixed rod, a release rod, and a lifting / lowering operating member, wherein the fixed rod is fixed to the base, the release rod is extendable and retractable relative to the fixed rod by at least a portion of it extending from below the fixed rod, and the lifting / lowering operating member is extendable and retractable relative to the release rod by at least a portion of it extending from below the release rod. The lifting mechanism is located within the base and is configured to interlock with the lifting operation member of the control lever via a lifting cord. It comprises an annular rope wheel, a winding unit, and a driven member. The annular rope wheel is rotatable in the axial direction of the roll bar and has a plurality of second contact points on its inner circumferential surface. The winding unit is connected to the annular rope wheel and, when the force applied to the annular rope wheel is released, rotates the annular rope wheel to return it to its original position. The driven member has a plurality of teeth on its outer circumference, is located within the base coaxially with the annular rope wheel, and corresponds to each of the plurality of second contact points. The device comprises a plurality of elastic arms, one end of which the lifting cord is fixed to the annular rope wheel, and the other end extends from the base and is inserted into the control lever and fixed to the lifting operating member, and when the lifting operating member receives force and extends toward the unlocking rod, the lifting cord moves together with the lifting operating member and rotates the annular rope wheel in the positive rotation direction, and when the annular rope wheel rotates in the positive rotation direction, the plurality of elastic arms are each engaged with the plurality of second contact parts, thereby rotating the driven member in the positive rotation direction in synchronization with the annular rope wheel. The unlocking mechanism is disposed within the base and configured to interlock with the unlocking rod of the control lever via an unlocking cord, and includes a movable member, the movable member being movably disposed within the base and having a pressing portion, one end of the unlocking cord fixed to the movable member, the other end extending from the base and inserted into the control lever and fixed to the unlocking rod, and when the unlocking rod receives force and extends relative to the fixed rod, the unlocking cord moves together with the unlocking rod, thereby moving the movable member in a first direction, engaging the pressing portion of the movable member with a plurality of teeth provided on the outer circumference of the driven member, and rotating the driven member in a negative rotation direction opposite to the positive rotation direction. The operating mechanism is connected between the lifting mechanism and the drive connector and comprises a drive shaft and at least one swing latch, the drive shaft extending along the axial direction of the roll bar, one end of which is inserted into the drive connector and the other end of which is fixed to the driven member so that the drive shaft can rotate together with the driven member in the same direction, and at least one swing latch is swingably provided between the drive shaft and the drive connector. Eventually, the lifting operation member receives force and rotates the annular rope wheel, the driven member, and the drive shaft in the positive rotational direction, thereby engaging at least one of the swing latches with at least one of the first contact portions of the drive connector, transmitting a torsional force to the roll bar to wind up the shielding material. When the force applied to the lifting operation member is released, the winding unit rotates the annular rope wheel in the negative rotational direction. As the annular rope wheel rotates in the negative rotational direction, the multiple elastic arms of the driven member slide over the tops of the multiple second contact portions, and at this time, the annular rope wheel does not rotate together with the driven member. In this pull-rod type curtain operating mechanism, when the unlocking rod receives force and extends relative to the fixed rod and rotates the driven member in the negative rotational direction, the driven member rotates the drive shaft of the operating mechanism in sync with the negative rotational direction, thereby disengaging at least one of the swinging latches and preventing it from engaging with at least one of the first contact portions of the drive connector, at which point the drive connector and the roll bar rotate freely relative to the drive shaft under the weight of the shielding material, thereby enabling the shielding material to be deployed.

2. The unlocking mechanism further comprises at least one return spring provided between the base and the movable member, wherein when the unlocking rod receives force and extends relative to the fixed rod and the unlocking cord moves the movable member in the first direction, at least one of the return springs elastically deforms, and thereafter, when the force applied to the unlocking rod is released, at least one of the return springs imparts return elasticity to the movable member, thereby returning the movable member to its original position. The pull-rod type curtain operating mechanism according to claim 1, wherein, during the return process, the pressing portion of the moving member slides over the tops of a plurality of teeth provided on the outer circumference of the driven member, and the moving member is configured not to rotate the driven member.

3. The aforementioned moving member further comprises a main body and a pressing member, The pull-rod type curtain operating mechanism according to claim 2, wherein the main body has a groove and a locking edge, the pressing member has a fixed end and an engaging end therewith, the fixed end is provided in the groove of the main body, the engaging end is pivotable in a direction deviating from the fixed end after being subjected to force, but is restricted by the locking edge and cannot pivot in the direction opposite to the direction of deviation when subjected to force in a stationary state, and the pressing portion of the moving member is located at the engaging end of the pressing member.

4. The pull-rod type curtain operating mechanism according to claim 2, wherein the pressing portion of the moving member is a rack structure, and the plurality of teeth of the rack structure are right-angle teeth.

5. The pull-rod type curtain operating mechanism according to claim 1, wherein the base has a shaft column, and the unlocking cord extends from the end fixed to the moving member, then bypasses the arcuate surface of the shaft column, extends from the base, and is then inserted into the control lever and fixed to the unlocking rod.

6. The operating mechanism further comprises a sleeve, which is fitted onto the drive shaft and has an axial groove and at least one through groove. The drive shaft has a positioning rib that fits into the axial groove, and rotates the sleeve by contacting one of the groove walls on both sides of the axial groove depending on the different rotation directions of the drive shaft. The pull-rod type curtain operating mechanism according to claim 1, wherein at least one of the swing latches swivels to a retracted position where it does not extend out of the through groove, because the amount of rotation of the drive shaft when the drive shaft is rotated in the negative rotation direction by the driven member is greater than the amount of rotation of the sleeve, thereby disengaging from at least one of the first contacts of the drive connector and thus allowing the roll bar to spin freely relative to the sleeve of the operating mechanism and deploy the shielding material.

7. The aforementioned operating mechanism further comprises a retaining spring, and the base comprises a cylinder structure having a locking wall. The retaining spring is fitted onto the sleeve, with one end abutting against the locking wall of the cylinder structure, and the other end inserted into the axial groove and in contact with the positioning rib of the drive shaft in a manner that it engages with the rib. The pull-rod type curtain operating mechanism according to claim 6, wherein at least one of the swinging latches engages with the first contact portion of the drive connector, and when the drive connector and the roll bar attempt to rotate in the negative rotational direction due to the weight of the shielding material, the retaining spring applies a restraining force to the roll bar.

8. The winding unit comprises a spring storage wheel and a spiral spring, The spring storage wheel is rotatably fitted onto the spring storage support of the base and is connected to the annular rope wheel so as to rotate together with the annular rope wheel, one end of the spiral spring is fixed to the spring storage support of the base and the other end is fixed to the spring storage wheel, and the spiral spring is coiled with the spring storage support as its approximate axis. When the spring storage wheel rotates relative to the spring storage column, the spring storage wheel is tightened or loosened in accordance with the change in the direction of rotation of the spring storage wheel. In the pull-rod type curtain operating mechanism according to claim 1, when the lifting operating member receives force and extends toward the unlocking rod and rotates the annular rope wheel in the positive rotation direction, the annular rope wheel rotates the spring storage wheel in the energy storage direction, thereby gradually tightening the spiral spring, and when the force applied to the lifting operating member is released, the spring storage wheel rotates in the opposite direction to the energy storage direction under the action of the unwinding elasticity of the spiral spring, and rotates the annular rope wheel in the negative rotation direction, and the spiral spring is gradually loosened in the spring storage wheel.

9. The driven member further comprises a main body and a plurality of support elastic sheets, The main body is configured such that each of the multiple elastic arms is elastically pivotable relative to the main body, and the multiple support elastic sheets are provided at positions corresponding to each of the multiple elastic arms, so that when the multiple elastic arms extend toward the multiple second contact portions and the annular rope wheel is rotated in the positive rotational direction, the multiple elastic arms are in contact with the multiple second contact portions in a manner that they are locked to each other. The pull-rod type curtain operating mechanism according to claim 1, wherein one end of each of the support elastic sheets is integrally connected to the corresponding elastic arm, and the other end is in contact with the main body.

10. The driven member further comprises a main body and a plurality of support elastic sheets, The main body is configured such that each of the multiple elastic arms is elastically pivotable relative to the main body, and the multiple support elastic sheets are provided at positions corresponding to each of the multiple elastic arms, so that when the multiple elastic arms extend toward the multiple second contact portions and the annular rope wheel is rotated in the positive rotational direction, the multiple elastic arms are in contact with the multiple second contact portions in a manner that they are locked to each other. The pull-rod type curtain operating mechanism according to claim 1, wherein one end of each of the support elastic sheets is integrally connected to the main body, and the other end is in contact with the corresponding elastic arm.

11. A curtain comprising a roll bar, a shielding material, and a pull-rod type curtain operating mechanism, The shielding material is configured such that one end is connected to the roll bar and it is rolled up or released by the roll bar. The aforementioned pull-rod type curtain operating mechanism is provided for operating the opening and closing of the curtain and comprises a drive connector, a base, a control lever, a lifting mechanism, a lock release mechanism, and an operating mechanism. The drive connector is fixed to one end of the roll bar so that the roll bar can rotate together with the drive connector, and its inner wall surface has at least one first contact portion. The base is provided corresponding to the end of the roll bar, The control lever is provided below the base and comprises a fixed rod, a release rod, and a lifting / lowering operating member, wherein the fixed rod is fixed to the base, the release rod is extendable and retractable relative to the fixed rod by at least a portion of it extending from below the fixed rod, and the lifting / lowering operating member is extendable and retractable relative to the release rod by at least a portion of it extending from below the release rod. The lifting mechanism is disposed within the base and configured to interlock with the lifting operating member of the control lever via a lifting cord, and comprises an annular rope wheel, a winding unit, and a driven member, the annular rope wheel being rotatable in the axial direction of the roll bar and having a plurality of second contact portions on its inner circumferential surface, the winding unit being connected to the annular rope wheel and, when the force applied to the annular rope wheel is released, rotates the annular rope wheel to return it to its original position, the driven member having a plurality of teeth on its outer circumference, being disposed within the base coaxially with the annular rope wheel, and comprising a plurality of elastic arms, each corresponding to a plurality of the plurality of second contact portions, one end of the lifting cord being fixed to the annular rope wheel, and the other end extending from the base and being inserted into the control lever and fixed to the lifting operating member, when the lifting operating member receives force and extends toward the unlocking rod, the lifting cord moves in accordance with the lifting operating member and rotates the annular rope wheel in the positive rotational direction. The unlocking mechanism is disposed within the base and configured to interlock with the unlocking rod of the control lever via an unlocking cord, and includes a movable member, the movable member being movably disposed within the base and having a pressing portion, one end of the unlocking cord fixed to the movable member, the other end extending from the base and inserted into the control lever and fixed to the unlocking rod, and when the unlocking rod receives force and extends relative to the fixed rod, the unlocking cord moves together with the unlocking rod, thereby moving the movable member in a first direction, engaging the pressing portion of the movable member with a plurality of teeth provided on the outer circumference of the driven member, and rotating the driven member in a negative rotation direction opposite to the positive rotation direction. The operating mechanism is connected between the lifting mechanism and the drive connector and comprises a drive shaft and at least one swing latch, the drive shaft extending along the axial direction of the roll bar, one end of which is inserted into the drive connector and the other end of which is fixed to the driven member so that the drive shaft can rotate together with the driven member in the same direction, and at least one swing latch is swingably provided between the drive shaft and the drive connector. When the lifting / lowering operating member receives force and extends toward the unlocking rod, causing the annular rope wheel to rotate in the positive rotation direction, the plurality of elastic arms of the driven member engage with the plurality of second contact portions provided on the inner circumferential surface of the annular rope wheel, thereby rotating the driven member in sync with the annular rope wheel in the positive rotation direction, and simultaneously rotating the drive shaft of the operating mechanism in sync with the positive rotation direction, engaging at least one of the swing latches with at least one of the first contact portions of the drive connector, thereby transmitting a torsional force to the roll bar to wind up the shielding material. When the force applied to the lifting / lowering operating member is released, the winding unit rotates the annular rope wheel in the negative rotation direction, and when the annular rope wheel rotates in the negative rotation direction, the plurality of elastic arms of the driven member slide over the tops of the plurality of second contact portions, and at this time the annular rope wheel does not rotate together with the driven member. In this curtain, when the unlocking rod receives force and extends relative to the fixed rod and rotates the driven member in the negative rotational direction, the driven member rotates the drive shaft of the operating mechanism in sync with the negative rotational direction, thereby disengaging at least one of the swinging latches and preventing engagement with at least one of the first contact portions of the drive connector, at which point the drive connector and the roll bar rotate freely relative to the drive shaft under the weight of the shielding material, thereby allowing the shielding material to be deployed.

12. The unlocking mechanism further comprises at least one return spring provided between the base and the movable member, wherein when the unlocking rod receives force and extends relative to the fixed rod and the unlocking cord moves the movable member in the first direction, at least one of the return springs elastically deforms, and thereafter, when the force applied to the unlocking rod is released, at least one of the return springs imparts return elasticity to the movable member, thereby returning the movable member to its original position. The curtain according to claim 11, wherein, during the return process, the pressing portion of the moving member slides over the tops of a plurality of teeth provided on the outer circumference of the driven member, and the moving member is configured not to rotate the driven member.

13. The aforementioned moving member further comprises a main body and a pressing member, The curtain according to claim 11, wherein the main body has a groove and a locking edge, the pressing member has a fixed end and an engaging end therewith, the fixed end is provided in the groove of the main body, the engaging end is pivotable in a direction deviating from the fixed end after being subjected to force, but is restricted by the locking edge from pivoting in the direction opposite to the direction of deviation, and the pressing portion of the movable member is located at the engaging end of the pressing member.

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