KR101289531B1 - Soundless dualroll blind apparatus - Google Patents

Abstract

PURPOSE: A soundless dual roll blind device is provided to prevent safety accidents by a ball chain and to successively lift a screen. CONSTITUTION: A soundless dual roll blind device (100) comprises first and second winding rods (110,310), a driving unit, a gap unit, and a return unit. A first screen and a second screen are individually wound on the first winding rod and the second winding rod. A chain pulley is connected to a first gear and a second gear of the first winding rod and the second winding rod. The return unit reversely rotates the chain pulley through a clutch without movement of the first screen and the second screen by using a restitution force of a returning spring when a pulling force of the ball chain on the front and the rear is released.

Description

Noiseless dual roll blind device {SOUNDLESS DUALROLL BLIND APPARATUS}

The present invention is to control the first screen and the second screen formed by the transmissive portion and the light shielding portion in the horizontal direction up and down to block the inflow of sunlight into the room, to prevent the exposure of indoor privacy dual roll blind device In more detail, the lower part of the ball chain for raising and lowering the first and second screens, and after the ball chain is pulled down once, the home retracting operation is smoothly performed so that the user can easily repeat the first and second screens. The second screen can be continuously raised and lowered, the user has less effort to operate, less noise is generated during the operation of the ball chain, so that a quiet indoor atmosphere can be maintained, and the first and second of various standards The present invention relates to a noiseless dual roll blind device that is generally applicable to a screen.

In general, roll blinds are devices that are installed in transparent glass windows or glass walls to block the light from the outside to adjust the atmosphere of the room or to block the room from being seen from the outside.

Conventional roll blinds have a structure in which one roll screen having the same light transmittance as a whole can be wound around one winding rod to block light. Such a roll blind has a structure in which a roll screen is wound up on a winding rod fixed at an upper portion thereof, and only a method of adjusting the height of the roll screen is used to adjust the amount of light transmitted.

The method of controlling the amount of light emitted by adjusting the height of the roll screen is that a part (lower part) is completely transmitted and a part (upper part) is completely blocked. In general, a structure capable of adjusting the light emission amount was required.

In order to solve such a problem, conventionally, a method of adjusting the amount of light transmission by arranging two roll screens in which the light transmitting portion and the light blocking portion are alternately arranged in the horizontal direction or the vertical direction so as to overlap each other, and adjusting the overlapping amount is provided. Also presented.

For example, the "roll blind" of the Republic of Korea Patent Publication No. 10-0866344, is provided on the window frame, and provided with a support frame provided with a pair of end plates on both left and right ends, and rotatable to the end plate of the support frame And a winding driver configured to rotate and drive any one of the first and second winding rods and the first and second winding rods.

And first and second screens individually coupled to the first and second winding rods, a weight bar on which lower ends of the first and second screens are fixed, and the first and second winding rods are mutually restrained and And a clutch unit for releasing, wherein the clutch unit includes a gear fixedly coupled to the take-up driver and a driven gear restrained and releasably attached to the second winding rod, wherein an intermediate gear is disposed between the gear and the driven gear. Is interposed, the driven gear has an arc-shaped clutch groove on one surface, the clutch groove has both ends, the second winding rod is provided with a clutch projection, the clutch projection is guided in the clutch groove while the clutch By selectively engaging and contacting both ends of the groove, the driven gear is configured to selectively restrain or release the second winding rod.

Such a conventional roll blind can simultaneously open and close the roll screen and adjust the light emission amount by operating one ball chain. In particular, the opening and closing structure of the roll screen and the light emission control structure are manufactured in a simple and reliable machine structure, and the cost saving effect due to the simplification of the structure is excellent, and the durability is excellent even by repeated operation.

As another conventional technology, "Dual Roll Blind" of Korean Patent Publication No. 10-1037049 is presented. Such a prior art has a first screen and a second screen each including a light transmitting portion and a light shielding portion, and a first winding rod and a second winding rod respectively winding the first screen and the second screen. And a first gear for rotationally driving the first winding rod, a second gear that rotates in dependence on the first gear and rotates the second winding rod, and at least one of the first gear and the second gear. It is provided with a tooth holding portion for transmitting the elastic force in the direction parallel to.

And a clutch body configured to receive the first gear, the second gear, and the engagement retaining portion therein, wherein the clutch body includes a setting hole formed at a position corresponding to the engagement retaining portion; At least one of the second gear has a structure positioned between the setting hole and the engagement retaining portion.

Therefore, such a conventional dual roll blinds provide an advantage of enabling the opening and closing of the roll screen and adjusting the light emission amount of the roll screen with one ball chain, and facilitating the initial setting of the roll screen.

However, such conventional techniques have a ball chain that the user uses to actuate the first and second screens to roll up or down, which is an endless track, the bottom of which extends down. Therefore, such a ball chain can cause a very dangerous situation.

For example, young children often hide in the back of the first and second screens that hang down, often playing hide-and-seek in the house. This cold often causes accidents.

The neck chain safety accident of such a ball is very fatal, and it is known that children will easily suffocate when the ball chain is caught in the neck while playing.

In addition, the ball chain of the conventional roll blind device, which is hung in the caterpillar, is often injured by a child, or an elderly person who runs indoors, who is easily hung down by the caterpillar of the catapult. Safety accidents are often happening.

In order to fundamentally prevent such a problem, the conventional ball chains stretched in the caterpillar type are not connected to each other, and the ball chains are placed high and placed out of reach of the young children so that the children or the elderly may not It is desirable not to get caught.

However, conventional roll blinds are thus separated from the lower end of the ball chain to shorten its length and placed high at an unreachable height of the young children, pulling the ball chain to adjust the height of the first and second screens. Next, there is a problem that the ball chain does not have a function of returning to the original position, and thus the ball chain cannot repeatedly operate the first and second screens unless the ball chain has a crawler type.

In addition, the conventional techniques are to directly connect the chain pulleys directly to the gear to transfer the power directly when pulling the ball chain to adjust the first and second screen up and down, the user has a large force in operation and noise is generated There was a problem.

In the related art, the gap adjustments of the first and second screens of the first and second screens are uniformly formed to adjust the gaps of the first and second screens to coincide with each other or to shift the light shields. Different roll blind devices should be used to match the light shield and the light shield to each other or to shift the light shield, and the first and second screens having light and light shields of different sizes may be universally used by using one device. It was to have a structure difficult to use.

In addition, the related arts have a problem in that the balls of the ball chain generate excessive noise when the ball chain is in contact with the chain cover pulley during operation of the ball chain, thereby not maintaining a quiet indoor atmosphere.

An object of the present invention is to solve the conventional problems as described above, it is possible to completely prevent the safety accident by the ball chain in advance, and once the ball chain is pulled downward, the home retracting operation is made smoothly by SUMMARY OF THE INVENTION An object of the present invention is to provide a noiseless dual roll blind device that is improved so that a user can easily raise and lower the first and second screens repeatedly repeatedly and conveniently.

In addition, another object of the present invention is to drive by applying the reduction ratio in the process to adjust the first and second screen up and down by pulling the ball chain, the user less power to operate, less noise in the process of operating the ball chain An object of the present invention is to provide a noiseless dual roll blind device that is improved to maintain a quiet indoor atmosphere.

In addition, another object of the present invention can be universally used to adjust the light-emitting portion and the light-shielding portion of different sizes in the first and second screens of different specifications by using a single device, so as to be matched with each other, or to deviate from each other, A noiseless dual roll blind apparatus applicable to the first and second screens is provided.

In order to achieve the above object, the present invention, in the dual roll blind device to be used to adjust the position of the first screen and the second screen formed in the transverse direction and the light shielding portion in the horizontal direction, respectively,

First and second winding rods to which the first screen and the second screen are respectively wound;

A chain pulley geared to the first and second gears of the first and second winding rods through a reduction gear to impart rotational force to the first and second winding rods, and a ball chain is formed around the chain pulley. Wound, the lower end of the ball chain is separated, the user pulls the front ball chain or the rear ball chain downward, respectively, the drive unit to make the forward and reverse rotation of the chain pulley;

By simultaneously driving the first and second winding rods by pulling the ball chain, the first screen and the second screen are raised and lowered at the same time, or one of the first and second winding rods is driven. A clearance for adjusting the light projecting portion and the light shielding portion of the first screen and the second screen to coincide or shift; And

When the front and rear ball chains of the driving unit are pulled to the lower side, a return spring accumulates rotational force. When the pulling force of the front and rear ball chains is released, the first and the second ball chains are restored using the restoring force of the return springs. It provides a noiseless dual-roll blind device, characterized in that to adjust the room to the light-shielding or light-transmitting state, including; a return unit for rotating the chain pulley through the clutch without moving the screen position.

And the present invention is preferably, the first screen and the second screen is connected to the bottom of the weight bar is maintained in the pulled down state, the first and second winding rods are formed on the first and second brackets on both sides of the cover A noiseless dual roll blind device is provided that is rotatably mounted on a two base shaft.

In addition, the present invention preferably, the drive portion chain pulley is connected to the reduction gear via a clutch, and the first and second gears of the first and second winding rods of the same diameter are gear-coupled to the upper and lower parts of the reduction gear. The diameter of the chain pulley is formed to be larger than the diameter of the reduction gear, and the diameters of the first and second gears are also formed to be larger than the diameter of the reduction gear, thereby reducing gear reduction from the chain pulley to the first and second gear sides. The driving force is transmitted while being made, and the noiseless dual roll blind device is characterized in that the driving force of the chain pulley for rotating the first and second gears is reduced.

And preferably, the drive unit is a clutch is disposed between the chain pulley and the reduction gear, circumferential direction on the inner circumferential surface of the chain pulley so that the reduction gear rotates with the chain pulley by pulling the front and rear ball chain A bidirectional protrusion protruding at equal intervals, and a plurality of rollers disposed between the respective bidirectional protrusions and disposed at circumferential equal intervals on an outer circumferential surface of the drive shaft of the reduction gear; Protruding to one side of the clutch at a position corresponding to the projections are arranged at equal intervals in the circumferential direction, the plurality of rollers are respectively located between the arc-shaped hanger protruding to one side of the clutch so that the front and rear ball chain downward When pulled, the chain pulley rotates so that each bidirectional protrusion rolls The clutch is rotated while being in close contact with the arc-shaped latching side of the clutch, and at the same time, the rollers are pushed toward the center of the drive shaft of the reduction gear so that the plurality of rollers grip the drive shaft of the reduction gear therein. It provides a noiseless dual roll blind device, characterized in that configured to rotate with the pulley.

In addition, the present invention preferably, the driving portion has a front and rear inclined surface in which each of the bidirectional projections are inclined in both directions from the inner circumferential surface of the chain pulley, respectively, the front and rear inclined surfaces of the roller pulley When the front ball chain is pulled by being in close contact with the upper side, the rear inclined surfaces of each of the bidirectional protrusions are in close contact with the roller to grip the drive shaft of the reduction gear to rotate the reduction gear forward with the chain pulley, and the rear Noiseless dual roll blinds, characterized in that when the ball chain is pulled, the front inclined surfaces of each of the bidirectional projections are in close contact with the roller to grip the drive shaft of the reduction gear to rotate the reduction gear together with the chain pulley. Provide a device.

And the present invention preferably, the play portion is formed on the inner side of the first winding rod, the first winding rod is an angle adjustment drive gear is formed in the rear end of the first winding rod is disposed, the front end of the angle adjustment drive gear Is splined to the inside of the angle adjustment fixing guide fitted to the outside, the angle adjustment fixing guide is fitted to the inside of the angle adjustment cover fitted to the first winding rod, while the angle adjustment drive gear is an arcuate protrusion on the outer peripheral surface Is formed, and the arc-shaped protrusion of the angle adjusting drive gear is fitted in correspondence with the arc-shaped step of the angle adjusting fixed guide, and the arc-shaped protrusion and the arc-shaped stepping through the spline coupling of the angle adjusting drive gear and the angle adjusting fixed guide. The angle of rotation can be adjusted by adjusting the angle of rotation of the inner space of the angle adjusting cover. It provides a noiseless dual roll blind device characterized in that the lock.

In addition, the present invention preferably, the angle adjustment cover is formed with a locking jaw therein, the locking jaw is located between both ends of the locking spring fitted on the inner first base shaft of the first winding rod, Free rotation of the first winding rod is limited on the base shaft, and the arc-shaped protrusion and the arc-shaped step of the angle adjusting drive gear and the angle adjusting guide in the inner space of the angle adjusting cover are circumferential except for the locking jaw of the angle adjusting cover. The moving distance of the arc-shaped protrusion and the arc-shaped stepping portion rotatable in the angular range and rotating within the circumferential angle range coincides with the height of the light-transmitting portion or the light-shielding portion of the first screen and the second screen, and the first screen. And spline coupling of the angle adjusting drive gear and the angle adjusting fixed guide according to the height of the light transmitting part or the light blocking part of the second screen. Adjusting the degree to provide a noise-free dual roll blind apparatus characterized in that for controlling the travel of the projection and the arc-shaped stepped arcuate.

And preferably, the return portion has a chain return gear rotatable on a fixed shaft protruding from the chain pulley cover, the return shaft is fitted to the fixed shaft, one end of the return spring of the chain return gear It is fixed to one side, the other end is coupled to the arc-shaped stopper which is fitted on the fixed shaft and fixed inside the first base shaft of the bracket, the gear of the chain return gear is coupled to the clutch gear of the drive unit, whereby the return unit is When the chain pulley is rotated by pulling the rear ball chain, the chain return gear rotates through the clutch gear and the elastic restoring force is accumulated on the return spring, and when the rotation force of the chain pulley is stopped, the chain return is made using the elastic restoring force of the return spring. Rotate the gear and clutch gear and rotate the chain pulley to rotate the first and second screens. It provides a noiseless dual roll blind device, characterized in that the front and rear ball chain to the original position without moving the position.

In addition, the present invention preferably, the chain pulley cover is characterized in that the front and rear guide edges surrounding the front and rear ball chain is expanded so as not to contact the front and rear guide edges when moving the ball chain up and down, respectively. A noiseless dual roll blind device is provided.

According to the noiseless dual roll blind apparatus according to the present invention, the lower end of the ball chain for operating the first and second screen, and the front and rear ball chain can be operated to achieve the lifting operation of the first and second screen, respectively. By doing so, it is possible to completely prevent various safety accidents that may be caused by the ball chain indoors.

According to the present invention, once the ball chain is pulled downward, the returning operation is smoothly performed automatically by the return unit, so that the user can easily pull up and down the first and second screens continuously by repeatedly pulling the ball chain. An improved effect can be obtained for convenience.

And according to the present invention, the operation is made smoothly by driving by applying the reduction ratio between the chain pulley and the first and second drive gear in the process of the user pulls the ball chain to adjust the first and second screen up and down, The user has little effort to operate the ball chain.

In addition, according to the present invention, the ball chain in the process of operating the ball chain does not generate a rattling noise by not contacting the guide corner inside the extended front and rear guide corner of the chain pulley cover can maintain a quiet indoor atmosphere The improved effect can be obtained.

And according to the present invention by adjusting the spline coupling angle of the angle adjustment drive gear and the angle adjustment fixed guide in accordance with the height of the light transmitting portion or the light blocking portion of the first screen and the second screen arc-shaped projections and circles in the interior space of the angle adjustment cover Since the rotational movement distance of the arc step can be adjusted, it is possible to use it universally to match or shift the light emitting parts of different sizes to be matched with or different from each other on the first and second screens of different sizes using one device. Can be. Thus, an excellent effect applicable to the first and second screens of various specifications using one device is also obtained.

1 is a partial cutaway cross-sectional view showing the entire noiseless dual roll blind apparatus according to the present invention as a whole.
2 is an enlarged cross-sectional view illustrating a driving mechanism provided in the noiseless dual roll blind apparatus according to the present invention.
Figure 3a is a side view showing the chain pulley structure of the drive unit provided in the noiseless dual roll blind apparatus according to the present invention.
Figure 3b is a side view showing a reduction gear of the reduction gear and the first and second gear of the drive unit provided in the noiseless dual roll blind apparatus according to the present invention.
4 is an exploded view illustrating important parts of a driving part, a clearance part, and a return part provided in the noiseless dual roll blind device according to the present invention.
Figure 5a is an explanatory view showing in detail the angle adjustment drive gear provided in the noiseless dual roll blind apparatus according to the present invention.
Figure 5b is an explanatory view showing in detail the driving guide for the angle adjustment provided in the noiseless dual roll blind apparatus according to the present invention.
Figure 6a is shown in detail the operation of adjusting the movement distance of the arc-shaped projection and the arc-shaped step by adjusting the spline coupling angle of the angle adjustment drive gear and the angle adjustment fixed guide provided in the noiseless dual roll blind device according to the present invention It is explanatory drawing.
Figure 6b is an explanatory view showing in detail the operation in which the arc-shaped projection and arc-shaped stepped in the silent dual roll blind apparatus according to the present invention rotates within the angular range of the circumferential direction of the angle adjustment cover.
Figure 7a is an explanatory view showing in detail the angle adjustment cover provided in the noiseless dual roll blind apparatus according to the present invention.
Figure 7b is an explanatory view showing in detail the angle fixing cover provided in the noiseless dual roll blind apparatus according to the present invention.
8A is an explanatory view showing in detail a chain return gear provided in a noiseless dual roll blind apparatus according to the present invention.
Figure 8b is a side view showing in detail the front and rear guide edge expansion structure of the chain pulley cover provided in the noiseless dual roll blind apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In the noiseless dual roll blind apparatus 100 according to the present invention, as shown in FIG. 1, the first screen S1 and the second screen each having the light-transmitting portion P1 and the light-shielding portion P2 formed in the horizontal direction, respectively. It is a device that is used to adjust the position (S2) up and down.

Noiseless dual roll blind apparatus 100 according to the present invention, the weight bar 105 is connected to the lower end of the first screen (S1) and the second screen (S2) and is maintained in a pulled downward state, the first and The second winding rods 110 and 310 are rotatably mounted on the first and second base shafts 120a and 120b formed at both brackets B1 and B2 of the cover (not shown).

The present invention includes first and second winding rods 110 and 310 to which the first screen S1 and the second screen S2 are wound, respectively, and apply rotational force to the first and second winding rods 110 and 310. The driving unit 200 is provided.

As shown in FIGS. 2 and 3A and 3B, the driving unit 200 is angle fixed with the angle adjusting drive gear 120 of the first and second winding rods 110 and 310 through the reduction gear 210. A chain pulley 220 geared to the first and second gears 122 and 322 provided in the drive gear 320 is provided. The ball chain 230 is wound around the chain pulley 220, and the ball chain The lower end of the 230 is separated, and the user pulls the front ball chain 230a or the rear ball chain 230b downward to achieve forward and reverse rotation of the chain pulley 220.

The driving unit 200 is a chain pulley 220 is connected to the reduction gear 210 via the clutch 240, the first and second winding rods 110 and 310 of the same diameter on the upper and lower portions of the reduction gear 210. The first and second gears 122 and 322 provided in the angle adjusting drive gear 120 and the angle fixed driving gear 320 are gear-coupled.

In addition, the diameter (d1) of the chain pulley 220 is formed larger than the diameter (d2) of the reduction gear 210, as shown in Figs. 3a and 3b, the diameter of the first and second gears (122,322) The diameters d3 are also formed larger than the diameter d2 of the reduction gear 210 so that the driving force is transmitted while the gear reduction is made from the chain pulley 220 toward the first and second gears 122 and 322. And it is a structure for reducing the rotational driving force of the chain pulley 220 for rotating the second gear (122,322).

And the drive unit 200 is a clutch 240 is disposed between the chain pulley 220 and the reduction gear 210, the clutch 240 is shown in Figure 4, the front, rear ball chain The reduction gear 210 is rotated together with the chain pulley 220 by pulling 230a and 230b.

The chain pulley 220 is disposed between the plurality of bidirectional protrusions 222 formed on the inner circumferential surface at equal intervals in the circumferential direction, and the respective bidirectional protrusions 222, and the drive shaft 214 of the reduction gear 210. ) A plurality of rollers 224 disposed on the outer circumferential surface at equal intervals in the circumferential direction.

In addition, the clutch 240 has a plurality of arc-shaped hooks 242 protruding to one side of the clutch 240 at positions corresponding to the bidirectional protrusions 222 are disposed at equal intervals in the circumferential direction, the arc-shaped hooks 242 Inside the drive shaft 214 of the reduction gear 210 is located.

In addition, the plurality of rollers 224 are respectively located between the arc-shaped hanging bracket 242 protruding to one side of the clutch 240, so that the front and rear ball chain 230a, 230b is pulled downward to the chain pulley ( As the 220 rotates, the bidirectional protrusion 222 rotates the clutch 240 while closely contacting the roller 224 toward the arc-shaped latch 242 of the clutch 240.

At the same time, the rollers 224 are pressed toward the center of the drive shaft 214 of the reduction gear 210 by the bidirectional protrusion 222 so that the plurality of rollers 224 are driven on the inside of the drive shaft 214 of the reduction gear 210. ) Is configured to rotate the reduction gear 210 together with the chain pulley 220 at the same time.

In addition, the driving unit 200 has respective bidirectional protrusions 222 having front and rear inclined surfaces 224a and 224b which are inclined in both directions from the inner circumferential surface of the chain pulley 220, respectively, such front and rear inclined surfaces 224a. , 224b are in close contact with the upper side of the rollers 224 at the time of rotation of the chain pulley 220, respectively.

Therefore, when the front ball chain 230a is pulled, the rear inclined surfaces 224b of each of the bidirectional protrusions 222 adhere to the roller 224 to grip the drive shaft 214 of the reduction gear 210. When the reduction gear 210 is rotated forward together with the chain pulley 220 and the rear ball chain 230b is pulled, the front inclined surfaces 224a of the bidirectional protrusions 222 are in close contact with the roller 224. Thus, the drive shaft 214 of the reduction gear 210 is gripped to rotate the reduction gear 210 together with the chain pulley 220.

And the noiseless dual roll blind device 100 according to the present invention, by simultaneously driving the first and second winding rods (110,310) by the pulling operation of the ball chain 230, the first screen (S1) and the second The screen S2 is moved up and down at the same time, or one of the first and second winding rods 110 and 310 is driven to transmit the light emitting portion P1 of the first and second screens S1 and S2. The clearance 400 is adjusted to match or shift the light blocking portion P2.

Such a clearance 400 is formed inside the first winding rod 110, and as shown in FIGS. 2 and 4, the first winding rod 110 has a first gear 122 therein. The rear end of the angle adjustment drive gear 120 is disposed, the front end of the angle adjustment drive gear 120 is coupled to the splines (124, 424) inside the angle adjustment fixing guide 410 fitted to the outside.

In addition, the angle adjustment fixing guide 410 is fitted into the inside of the angle adjustment cover 430 fitted to the first winding rod 110, the angle adjustment drive gear 120, as shown in detail in Figure 5a, An arcuate projection 128 is formed on an outer circumferential surface, and the arcuate projection 128 of the angle adjustment drive gear 120 is formed on the arcuate step 428 of the angle adjustment fixing guide 410 as shown in FIG. 5B. Are fitted accordingly.

And as shown in Figure 6a the arc-shaped projection 128 and the arc stepped step 428, through the spline (124, 424) coupling of the angle adjustment drive gear 120 and the angle adjustment fixing guide 410 As shown in Figure 6b by adjusting the coupling angle, it is configured to adjust the angle range (W) rotated in the inner space of the angle adjusting cover 430.

The clearance 400 is such that the angle adjustment cover 430 is shown in Figure 6b and 7a, the locking jaw 434 is formed on the inside, the locking jaw 434 is the first winding Located between both ends 452a of the locking spring 450a fitted on the inner first base shaft 120a of the rod 110, the free rotation of the first winding rod 110 on the first base shaft 120a. This is limited.

The locking spring 450a is a structure commonly used in roll blind fields, and the angle adjusting drive gear 120 and the angle adjusting guide 410 coupled to each other narrow the both ends 452a of the locking spring 450a. When the locking spring 450 and the first winding rod 110 can be freely rotated on the first base shaft 120a, the angle adjusting drive gear 120 and the angle adjusting fixing guide 410 are not operated. It is a conventional structure to lock the angle adjusting cover 430 and the first winding rod 110 on the first base shaft (120a).

In addition, as shown in FIG. 6B, the clearance 400 is an arc-shaped protrusion 128 of the angle adjusting drive gear 120 and the angle adjusting fixing guide 410 in the inner space of the angle adjusting cover 430. ) And the arc-shaped stepped jaw 428 are rotatable in the circumferential angular range (W) except for the locking ledge 434 of the angle adjusting cover 430, and rotated within the circumferential angular range (W). The movement distance of the arcuate protrusion 128 and the arcuate step 428 coincides with the height of the light projecting portion P1 or the light shielding portion P2 of the first screen S1 and the second screen S2.

That is, when the arcuate projection 128 and the arcuate step 428 in the coupled state are rotated through the circumferential angle range W of the angle adjustment cover 430, the first screen S1 may be damaged. Although the copper is limited, the second screen S2 is moved up and down so that the light emitting portion P1 or the light blocking portion P2 of the second screen S2 is the light transmitting portion P1 or the light blocking portion (1) of the first screen S1. Relative to P2, and eventually the light emitting portions P1 or the light blocking portions P2 coincide with each other to be in a light transmitting state, or the light emitting portions P1 of the first screen S1 and the second screen S2 The light blocking portion P2 coincides with the light blocking position.

Therefore, according to the present invention, as shown in FIG. 6A in accordance with the height of the light transmitting portion P1 or the light blocking portion P2 of the first screen S1 and the second screen S2, the angle adjustment drive gear 120 And the splines 124 and 424 of the angle adjustment fixing guide 410 can adjust the coupling angle, the arc-shaped protrusion 128 and the arc-shaped step 428 within the circumferential angle range (W) of the angle adjustment cover 430. You can adjust the distance of travel.

By doing so, the present invention adjusts the light-emitting portions P1 and the light-shielding portions P2 of different sizes to be matched with or shifted from each other in the first and second screens S1 and S2 of different sizes using one device. It can be used universally. Therefore, an excellent effect applicable to the first and second screens S1 and S2 of various specifications is obtained by using one device.

The clearance 400 is such that the arcuate projection 128 and the arcuate step 428 of the state coupled to each other push the both ends 452a of the lock spring 450a to release the lock state of the lock spring 450a. In this case, free rotation of the angle adjusting cover 430 and the first winding rod 110 on the first base shaft 120a is possible, and at this time, the second winding rod (on the second base shaft 120b described later) 310 is also rotated, so that the first and second screens S1 and S2 are wound or unwound at the same time without the relative movement between the first and second winding rods 110 and 310, respectively, so that they can move simultaneously.

On the other hand, such a gap 400 is formed on the inner side of the first winding rod 110, the second winding rod 310 is shown in Figure 2 and 4 with the clearance 400 is omitted. As described above, the angle fixed drive gear 320 formed at the rear end of the second gear 322 is geared to the gear reduction gear 210, and the angle fixed cover (outside the angle fixed drive gear 320). 340 is fitted, the second winding rod 310 is fitted on the angle fixing cover 340 is connected.

In addition, as shown in FIGS. 4 and 7B, the angle fixing cover 340 has a fixing jaw 344 formed therein, and the fixing jaw 344 is an inner side of the second winding rod 310. Located between both ends 452b of the locking spring 450b fitted on the second base shaft 120b, the angle fixing cover 340 and the second winding rod 310 are freely disposed on the second base shaft 120b. Rotation is limited.

Such a locking spring 450b is also commonly used in roll blind applications. When the angular fixed drive gear 320 narrows both ends 452b of the locking spring 450b, the locking spring 450b is disposed on the second base shaft 120b. When the angle fixing cover 340 and the second winding rod 310 can be freely rotated, and the angle fixing drive gear 320 does not operate, the angle fixing cover 340 and the second winding are on the second base shaft 120b. Locking the rod 310 is a conventional structure for fixing.

And the noiseless dual roll blind device 100 according to the present invention, the front and rear ball chain 230a, 230b of the drive unit 200 is provided with a return spring 510 for accumulating rotational force, when pulled to the lower side, When the pulling force of the front and rear ball chains 230a and 230b is released, the clutch 240 may be moved without moving the positions of the first and second screens S1 and S2 by using the restoring force of the return spring 510. It includes a return unit 500 for rotating the chain pulley 220 reversely.

As shown in FIGS. 2 and 8A, the return unit 500 includes a chain return gear 520 rotatable on a fixed shaft 610 protruding from the chain pulley cover 600, and the fixed shaft ( The return spring 510 is fitted to 610.

One end of the return spring 510 is fixed to one side of the chain return gear 520, and the other end of the return spring 510 is fitted on the fixed shaft 610 so that the inside of the first base shaft 120a of the bracket B2 is fixed. It is coupled to the arc-shaped stopper 620 fixed to the, the gear of the chain return gear 520 is coupled to the clutch gear 246 of the drive unit 200 (see Figure 2).

Therefore, when the chain pulley 220 is rotated by pulling the front and rear ball chains 230a and 230b, the return unit 500 rotates the chain return gear 520 through the clutch gear 246 provided at the front end of the clutch 240. As the spring rotates, the return spring 510 is twisted between the chain return gear 520 and the arc stopper 620 to accumulate elastic restoring force.

When the rotational force of the chain pulley 220 is stopped, the chain return gear 520 and the clutch gear 246 are reversely rotated using the elastic restoring force of the return spring 510, and the chain pulley 220 is reversely rotated. Thus, the front and rear ball chains 230a and 230b are returned to their original positions without moving the first and second screens S1 and S2.

The operation of repositioning the front and rear ball chains 230a and 230b without moving the positions of the first and second screens S1 and S2 in the return unit 500 is as follows.

That is, when the chain return gear 520 and the clutch gear 246 reversely rotate by using the elastic restoring force of the return spring 510 of the return unit 500, the clutch 240 reversely rotates. 2) and 4), the clutch 240 may be rotated around the reduction gear 210 so that the reverse rotation of the clutch 240 reversely rotates the reduction gear 210. Without rotating, only the chain pulley 220 is rotated in reverse.

In this case, the reverse rotation of the clutch 240 causes the arc-shaped hanging bars 242 protruding to one side of the clutch 240 to move the roller 224 backward between the bidirectional protrusions 222 of the chain pulley 220, and the roller 224 pushes the bidirectional protrusions 222 of the chain pulley 220 to rotate the chain pulley 220, wherein the rollers 224 are not pressed in the direction of the drive shaft 214 of the reduction gear 210, The reduction gear 210 does not reverse rotation, only the chain pulley 220 is reversed.

Therefore, such a reverse rotation of the chain pulley 220 achieves the home position return operation of the front and rear ball chains 230a and 230b, and since the reduction gear 210 does not reverse, the first and second screens S1, S2) does not move position.

On the other hand, the noiseless dual roll blind apparatus 100 according to the present invention, the chain pulley cover 600 as shown in Figure 8b, the front, front and rear guide corners surrounding the front and rear ball chain (230a, 230b) 630a and 630b are enlarged so as not to contact the front and rear guide edges 630a and 630b when the ball chain 230 moves up and down.

Therefore, the ball chain 230 in the process of operating the ball chain 230 does not generate a rattling noise can maintain a quiet indoor atmosphere.

Reference numeral 700 is a central axis protruding from the chain pulley cover 600, the reduction gear 210 is rotatably mounted.

In the noiseless dual roll blind apparatus 100 according to the present invention configured as described above, first and second screens S1 and S2 are respectively wound around the first and second winding rods 110 and 310, for example. When the user pulls the front ball chain 230a downward, the ball chain 230 rotates the chain pulley 220 to rotate the drive shaft 214 of the reduction gear 210 through the clutch 240 and at the same time the clutch gear. The chain return gear 520 of the return unit 500 rotates through 246 to accumulate elastic restoring force in the return spring 510.

When the reduction gear 210 rotates, this rotates the angle adjusting drive gear 120 by meshing with the first gear 122 of the angle adjusting drive gear 120, and at the same time, the second gear of the angle fixing drive gear 320. Engage with 322 to rotate the angle fixed drive gear (320). At this time, the rotation direction of the angle adjustment drive gear 120 and the angle fixed drive gear 320 is the same.

Therefore, the angle adjustment drive gear 120 is spline 124, 424 is coupled to the angle adjustment fixed guide 410, thereby simultaneously rotating the angle adjustment fixed guide 410, the angle adjustment drive gear 120 and the angle adjustment The arcuate protrusions 128 and the arcuate step 428 coupled to each other of the fixing guide 410 may have an end portion 452a of the locking spring 450a on the first base shaft 120a as shown in FIG. 6B. Push to release the lock state, by pushing the locking jaw 434 of the angle adjustment cover 430 to rotate the first winding rod 110 to lower the first screen (S1).

Meanwhile, as shown in FIG. 7B, the angle fixed drive gear 320 releases the locked state by pushing the end portion 452b of the locking spring 450b on the second base shaft 120b and the angle fixed cover 340. The second screen (S2) is simultaneously lowered by rotating the second winding bar 310 by pushing the fixing jaw 344 of the).

Therefore, the first and second screens S1 and S2 wound on the first and second winding rods 110 and 310, respectively, are simultaneously lowered to a predetermined height.

And when the user releases the pulled state of the front ball chain 230a in this state, the ball chain 230 is raised to its original position by using the elastic restoring force of the return spring 510 provided in the return unit 500. The user pulls the front ball chain 230a again to further lower the first and second screens S1 and S2, raises the ball chain 230 again, and then repeats the pulling operation to repeat the first and second operations. Lower the screens S1 and S2 to the desired height.

When the first and second screens S1 and S2 are lowered to the desired heights, the first screen S1 and the second screen S2 are moved relative to the first screen S1. The light projecting portion P1 or the light shielding portion P2 of the screen S2 is adjusted to coincide with each other.

At this time, the user pulls the rear ball chain 230b to the lower side. In this case, the ball chain 230 rotates the chain pulley 220 in reverse to drive the drive shaft 214 of the reduction gear 210 through the clutch 240. At the same time, the chain return gear 520 of the return unit 500 is reversed through the clutch gear 246, and the elastic restoring force of the reverse rotation is accumulated in the return spring 510.

When the reduction gear 210 rotates in reverse, it engages with the first gear 122 of the angle control gear 120 to reversely rotate the angle control gear 120, and at the same time, 2 rotates the angle fixed drive gear 320 by meshing with the gear (322).

Therefore, the angle adjustment drive gear 120 has an angle adjusting fixing guide 410 and the arc-shaped protrusion 128 and the arc-shaped step 428 is the angle adjustment in the opposite direction of the locking step 434 of the angle adjustment cover 430 Reverse rotation in the circumferential angle range (W) of the cover 430, in this case, the angle adjustment drive gear 120 and the angle adjustment fixing guide 410 does not transmit the reverse rotation power to the angle control cover 430 As a result, the angle adjusting cover 430 does not rotate in reverse, and accordingly, the first winding rod 110 is also stopped and the first screen S1 does not move.

However, the angular fixed drive gear 320 is reversely rotated to release the locked state by pushing the end portion 452b of the locking spring 450b on the second base shaft 120b in the opposite direction, as shown in FIG. Pushing the fixing jaw 344 of the angle fixing cover 340 in the opposite direction to reverse the second winding rod 310 to raise the second screen (S2) by a certain height.

Accordingly, the second screen S2 moves upward, but the first screen S1 is stopped, and the movement of the second screen S2 is limited, so that the light projecting portion P1 or the light blocking portion P2 of the second screen S2 is the first screen S1. Relative to the light-transmitting part P1 or the light-shielding part P2), and thus, the light-transmitting parts P1 or the light-shielding parts P2 are adjusted to be in a light-transmitting state by coinciding with each other, or the light of the first screen S1 is transmitted. The light portion P1 and the light shielding portion P2 of the second screen S2 coincide with each other to be adjusted to the light shielding state.

At this time, the light transmitting state and the light blocking state can be selectively adjusted by pulling the rear ball chain 230b to the extent desired by the user.

In this state, if the first and second screens S1 and S2 are used, and then the first and second screens S1 and S2 are wound on the first and second winding rods 110 and 310 for storage, Continuously pulls the rear ball chain 230b downward.

Therefore, the ball chain 230 reversely rotates the chain pulley 220 to reversely rotate the drive shaft 214 of the reduction gear 210 through the clutch 240, and at the same time, the return unit 500 through the clutch tooth 246. The chain return gear 520 reversely rotates, and the elastic return force of the reverse rotation is accumulated in the return spring 510.

When the reduction gear 210 rotates in reverse, it engages with the first gear 122 of the angle control gear 120 to reversely rotate the angle control gear 120, and at the same time, The angle fixed drive gear 320 is also rotated by being engaged with the two gears 322.

Accordingly, the angle adjusting drive gear 120 has an arc-shaped protrusion 128 and an arc-shaped step 428 together with the angle adjusting fixing guide 410, as shown in FIG. 6B, on the first base shaft 120a. Push the end 452a of the spring 450a to the opposite side to release the lock state, and push the locking jaw 434 of the angle adjusting cover 430 in the opposite direction to rotate the first winding rod 110 to reverse the first screen. Raise S1.

Meanwhile, as shown in FIG. 7B, the angle fixing drive gear 320 releases the locking state by pushing the end portion 452b of the locking spring 450b on the second base shaft 120b in the opposite direction, and the angle fixing is performed. Pushing the fixing jaw 344 of the cover 340 in the opposite direction to reverse the second winding rod 310 to raise the second screen (S2) at the same time.

Therefore, the first and second screens S1 and S2 wound on the first and second winding rods 110 and 310, respectively, are simultaneously raised to a certain height.

In this state, when the user releases the pulled state of the rear ball chain 230b, the ball chain 230 returns to its original position by using the reverse rotation elastic restoring force of the return spring 510 provided in the return part 500. As a result, the user pulls the rear ball chain 230b again to further raise the first and second screens S1 and S2, raises the ball chain 230 again, and then repeats the pulling operation to repeat the first and second operations. The second screens S1 and S2 are raised to a desired height and wound around the first and second winding rods 110 and 310, respectively.

As described above, the noiseless dual roll blind apparatus 100 according to the present invention separates the lower end of the ball chain 230 for operating the first and second screens S1 and S2, and the front and rear ball chains 230a and 230b. By operating each of the user can achieve the desired lifting operation of the first and second screens (S1, S2) can be completely prevented in advance various safety accidents that may occur by the ball chain 230 in the room have.

In addition, according to the present invention, once the ball chain 230 is pulled downward, the returning operation is automatically performed by the return unit 500 so that the user can easily and repeatedly pull the first and second screens S1 and S2. It is easy to use because it can raise and lower continuously.

In addition, according to the present invention, between the chain pulley 220 and the first and second gears 122 and 322 in the process of the user pulling the ball chain 230 to adjust the first and second screens S1 and S2 up and down. By driving by applying the reduction ratio in the operation is made smoothly, the user less effort to manipulate the ball chain 230.

In addition, according to the present invention, in the process of operating the ball chain 230, the ball chain 230 has guide edges 630a and 630b inside the extended front and rear guide edges 630a and 630b of the chain pulley cover 600. ), You can maintain a quiet indoor atmosphere by not making rattling noises.

According to the present invention, the angle adjusting drive gear 120 and the angle adjusting fixing guide 410 of the angle adjusting drive gear 120 and the angle adjusting part P1 or the light blocking part P2 of the first screen S1 and the second screen S2 are adjusted. By adjusting the spline (124,424) engaging angle can be adjusted the rotational movement distance of the arcuate projection 128 and the arcuate step 428 in the circumferential angle range (W) formed in the inside of the angle adjustment cover 430 Therefore, by using one device, the first and second screens S1 and S2 of different sizes may be used to adjust the light-emitting portions P1 and the light-shielding portions P2 of different sizes to be matched with or offset from each other. Can be used as Therefore, by using a single device can be universally applicable to the first and second screens (S1, S2) of various standards can be used more industrially useful.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the accompanying drawings, the present invention is not limited to such specific structures. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the following claims. However, it is intended that the present invention cover modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: noiseless dual roll blind device 105: weight bar
110, 310: first and second winding rod 120: angle adjustment drive gear
120a, 120b: first and second base shafts 122, 322: first and second gears
124,424: Spline 128: Circular arc
200: drive unit 210: reduction gear
214: drive shaft 220: chain pulley
222: bidirectional protrusion 224: roller
230: ball chain 230a: front ball chain
230b: rear ball chain 240: clutch
242: arc hang 246: clutch gear
320: angle fixed drive gear 340: angle fixed cover
344: fixed jaw 400: play part
410: fixed angle guide 428: arc stepped
430: angle adjustment cover 434: locking jaw
450a, 450b: locking springs 452a, 452b: both ends
510: return spring 520: chain return gear
600: chain pulley cover 610: fixed shaft
620: arc stopper 630a, 630b: front and rear guide corner
700: central axis B1, B2: bracket
d1: diameter of chain pulley d2: diameter of reduction gear
d3: diameter P1 of the first and second gears: light transmitting part
P2: shading part S1: first screen
S2: second screen W: angle range

Claims (8)

In the dual roll blind device which is used to adjust the position of the first screen and the second screen formed by the transmissive portion and the light shielding portion in the horizontal direction up and down,
First and second winding rods to which the first screen and the second screen are respectively wound;
A chain pulley geared to the first and second gears of the first and second winding rods through a reduction gear to impart rotational force to the first and second winding rods, and a ball chain is formed around the chain pulley. Wound, the lower end of the ball chain is separated, the user pulls the front ball chain or the rear ball chain downward, respectively, the drive unit to make the forward and reverse rotation of the chain pulley;
By simultaneously driving the first and second winding rods by pulling the ball chain, the first screen and the second screen are raised and lowered at the same time, or one of the first and second winding rods is driven. A clearance for adjusting the light projecting portion and the light shielding portion of the first screen and the second screen to coincide or shift; And
When the front and rear ball chains of the driving unit are pulled to the lower side, a return spring accumulates rotational force. When the pulling force of the front and rear ball chains is released, the first and the second ball chains are restored using the restoring force of the return springs. Noiseless dual roll blind device, characterized in that to adjust the room to the light-shielding or light-transmitting state, including; a return unit for rotating the chain pulley through the clutch without moving the position of the screen. According to claim 1, The drive pulley chain is connected to the reduction gear via a clutch, the first gear and the second gear of the first and second winding rods of the same diameter are geared to the upper and lower parts of the reduction gear, The diameter of the chain pulley is formed larger than the diameter of the reduction gear, and the diameters of the first and second gears are also formed larger than the diameter of the reduction gear, whereby the gear reduction is performed from the chain pulley to the first and second gear sides. Noiseless dual roll blind device characterized in that the driving force is transmitted, reducing the rotational driving force of the chain pulley for rotating the first and second gears. According to claim 2, The drive unit is a clutch is disposed between the chain pulley and the reduction gear, circumferentially equal intervals on the inner circumferential surface of the chain pulley so that the reduction gear rotates together with the chain pulley by pulling the front and rear ball chain. And a plurality of rollers disposed between the two bidirectional protrusions, the plurality of rollers being disposed at equal intervals in the circumferential direction on the outer circumferential surface of the reduction gear, wherein the clutch has a plurality of arc-shaped hanging bars. When the front and rear ball chains are pulled downward by protruding to one side of the clutch at a position corresponding to and disposed at equal circumferential intervals, and the plurality of rollers are positioned between arc-shaped hangers protruding to one side of the clutch, respectively. As the chain pulley rotates, each bidirectional protrusion pushes the roller to the clutch. While close to the arc-shaped hanger side, the clutch is rotated, and at the same time the rollers are urged toward the center of the drive shaft of the reduction gear so that the plurality of rollers grip the drive shaft of the reduction gear therein to rotate together with the chain pulley. Noiseless dual roll blind device, characterized in that configured to. According to claim 3, The drive unit has a front and rear inclined surface in which each of the bidirectional projections are inclined in both directions from the inner peripheral surface of the chain pulley, respectively, The front and rear inclined surfaces are respectively the upper side of the rollers when the chain pulley rotates When the front ball chain is pulled in contact with each other, the rear inclined surfaces of each of the bidirectional protrusions adhere to the roller to grip the driving shaft of the reduction gear to rotate the reduction gear forward with the chain pulley, and the rear ball chain And the front inclined surfaces of each of the bidirectional protrusions are in close contact with the roller to grip the driving shaft of the reduction gear to rotate the reduction gear together with the chain pulley. According to claim 1, wherein the play portion is formed on the inside of the first winding rod, the first winding rod is provided with an angle adjustment drive gear is formed in the rear end of the first gear, the front end of the angle adjustment drive gear is Spline-coupled from the inside of the angle adjustment fixing guide fitted to the outside, the angle adjustment fixing guide is fitted to the inside of the angle adjustment cover fitted to the first winding rod, while the angle adjustment drive gear is formed with an arc-shaped protrusion on the outer peripheral surface The arc-shaped protrusion of the angle adjusting drive gear is fitted in correspondence with the arc-shaped step of the angle adjusting fixed guide, and the arc-shaped protrusion and the arc-shaped stepping are coupled through the spline coupling of the angle adjusting drive gear and the angle adjusting fixed guide. By adjusting the angle is configured to adjust the angle range rotated in the inner space of the angle adjusting cover Noise dual roll blind apparatus according to claim. The method of claim 5, wherein the angle adjustment cover has a locking jaw formed therein, the locking jaw is located between both ends of the locking spring fitted on the inner first base shaft of the first winding rod, In the free rotation of the first winding rod is limited, the arc-shaped projection and the arc-shaped step of the angle adjusting drive gear and the angle adjusting guide in the inner space of the angle adjusting cover is the angle range of the circumferential direction excluding the locking jaw of the angle adjusting cover The moving distance between the arcuate protrusion and the arcuate step which is rotatable in the circumferential angle range is equal to the height of the light transmitting portion or the light shielding portion of the first screen and the second screen, and the first screen and the first screen. 2 Adjust the spline coupling angle of the angle adjusting drive gear and the angle adjusting fixing guide according to the height of the light transmitting part or the light blocking part of the screen. Noise dual roll blind apparatus characterized in that for controlling the travel of the projection and the arc-shaped stepped arcuate. According to claim 1, wherein the return portion has a chain return gear rotatable on a fixed shaft protruding from the chain pulley cover, the fixed shaft is fitted with a return spring, one end of the return spring on one side of the chain return gear It is fixed, the other end is fitted on the fixed shaft and coupled to the arc-shaped stopper fixed inside the first base shaft of the bracket, the gear of the chain return gear is coupled to the clutch gear of the drive, so that the return portion is front and rear When the chain pulley is rotated by pulling the ball chain, the chain return gear rotates through the clutch gear, and the elastic restoring force is accumulated on the return spring. When the rotation force of the chain pulley is stopped, the chain return gear and the chain return gear are made using the elastic restoring force of the return spring. Reverse the clutch gear and reverse the chain pulley so that the first and second screens do not move. , Noise dual roll blind apparatus characterized in that the original position of the rear ball chain. According to claim 7, The chain pulley cover is noiseless, characterized in that the front and rear guide corners surrounding the front and rear ball chain is enlarged, respectively, so as not to contact the front and rear guide corners when the ball chain moves up and down Dual roll blinds.

Images