Roller blind device

The present invention relates to a roller blind device, which comprises a special curtain. The roller blind device also comprises a first circular tube for fixing the upper end of the special curtain and a second circular tube for fixing the lower end of the special curtain. A torsion spiral which is capable of rolling up the special curtain and a stop means for lifting the second circular tube are arranged in the second circular tube. Such structure ensures that the roller blind device can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains.

FIELD OF THE INVENTION

The present invention relates to a roller blind device, more specifically, to a roller blind device with a plurality of roller blind curtains which can be rolled up or one of which can be shown.

BACKGROUND OF THE INVENTION

A common roller blind is generally classified as a manual one and an electric one. The roller blind shown inFIG. 1is a manual roller blind. The upper end of a common curtain4is fixed to a first circular tube1through an adhesive tape and the lower end of the common curtain4is fixed to a bottom bar5. A user can pull a chain to rotate a driver which subsequently rotates the first circular tube1to roll up the common curtain onto the first circular tube1or to unfold the common curtain4away from the first circular tube1. In this way, the user can choose to roll up or show the common curtain4with a size equivalent to that of the window.

FIG. 2shows an electrical roller blind, which uses a tubular electrical motor to rotate the first circular tube1. The user can choose to roll up or show one common curtain4with a size equivalent to that of the window.

Same or different curtain materials can be jointed together to form a common curtain4utilizing an adhesive or sewing or ultrasonic welding.

The present roller blind devices have their own drawbacks and problems, such as they can only roll up or show one common curtain4with a size equivalent to that of the window.

SUMMARY OF THE INVENTION

The objective of the present invention is to provide a roller blind device which can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains, aiming at the problems in the prior art that the above mentioned roller blind device can only roll up or show one common curtain.

According to an aspect, a roller blind device is provided, which comprising a special curtain; a first circular tube for fixing an upper end of the special curtain and a second circular tube for fixing a lower end of the special curtain; a torsion spiral which is capable of rolling up the special curtain and a stop element for lifting the second circular tube are arranged in the second circular tube.

In the roller blind device of the present invention, the roller blind device comprises an iron baffle, on both ends of which a first connection plate of “Z” shape of a left flexing iron plate and a second connection plate of “Z” shape of a right flexing iron plate are fixed; an included angle between the first connection plate and a first bending plate connected together is a right angle, an included angle between the first bending plate and a third connection plate connected together is a right angle, an included angle between the second connection plate and a second bending plate connected together is a right angle and an included angle between the second bending plate and a fourth connection plate connected together is a right angle; the right flexing iron plate is a mirror of the left flexing iron plate, and two circular iron shafts are fixed symmetrically on the first bending plate and the second bending plate.

In the roller blind device of the present invention, the circular iron shaft comprises a stepped circular shaft; a free-rotating nylon bearing with a groove and a projecting edge for fixing a ribbing and a section of the second circular tube respectively on its external surface, is arranged outside of the stepped circular shaft.

In the roller blind device of the present invention, the left end of an iron square shaft is fixed in the centre square hole of the left circular iron shaft; the iron square shaft is inserted into the right end square hole of the torsion spiral, the left end post of the torsion spiral is fixed in the right side hole of the left nylon bearing.

In the roller blind device of the present invention, the stop element comprises an iron connecting element which is permanently connected with the right end hole of the iron square shaft; an iron screw shaft, the right end of which is cut into a square stem and fixed in the centre square hole of a right circular iron shaft while the left end hole is fixed in the iron connecting element; a nylon supporting runner provided with a groove outside to clamp tightly in the ribbing inside the second circular tube and a circular hole inside to rotate outside of the iron connecting element; and an iron distance-metering gear provided with a groove outside to slide along the ribbing inside the second circular tube and a screw hole at the centre to rotate around the iron screw shaft, the iron distance-metering gear breaks away from or combines with the iron connecting element to enable the second circular tube to rotate or to be lifted and move up and down.

In the roller blind device of the present invention, the weight of the iron baffle is maintained approximately stable with the second circular tube and its internal components by taking the right flexing iron plate or the left flexing iron plate as a lever and taking the special curtain as a fulcrum.

In the roller blind device of the present invention, the locations and weights of the torsion spiral, the iron distance-metering gear, the nylon supporting runner and the iron connecting element are maintained approximately stable by taking the second circular tube as a lever and taking the centre of the special curtain as a fulcrum.

In the roller blind device of the present invention, the both ends of the iron baffle move up and down in the vertical direction along grooves of aluminium alloy tracks of “F” shape on both sides; both flat surfaces of the aluminium alloy track of “F” shape are not reflective.

In the roller blind device of the present invention, the special curtain is made of at least two different curtain materials which are slightly higher than the window.

In the roller blind device of the present invention, there is a circular hole on each of the third connection plate and the fourth connection plate; the circular hole can slide to two iron cones at the same level of the windowsill; the third connection plate and the fourth connection plate fix a bar of supporting aluminium alloy corner by a rivet at the same time.

Implementing the roller blind in the present invention, advantage that a plurality of roller blind curtains can be rolled up or one of which can be shown, can be achieved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following components can be selected and used in the roller blind device a required:

Reference number for theaccompanying drawingComponent1A first circular tube 12Windowsill 23Window frame 34Curtain of a common roller blind 45Bottom bar of a common roller blind 510Stop element 1012Iron distance-metering runner 1213Nylon supporting runner 1314Iron connecting element 1417Nylon bearing 1720Special curtain 2031Iron screw shaft 3132Iron square shaft 3236Circular iron shaft 3637Torsion spiral 3739A second circular tube 3949Left flexing iron plate 4950Right flexing iron plate 5051Iron baffle 5152Aluminium alloy track of F shape 5253Iron cone 5354Option: nylon sheet 5455Supporting aluminium alloy corner 5556Option: security hard frosted screen 5657Option: wool top 57

The same reference number for the accompanying drawing in the specific embodiment and the prior art represents the same object.

The present invention will be illustrated detailedly in the following with reference to the accompanying drawings3A-34C.

Component1, namely “a first circular tube1” is an aluminium alloy circular tube used in a common electric or manual roller blind. An adhesive tape is usually used to fix the roller blind curtain to the surface of the circular tube.

Component2, namely “windowsill2” is a common windowsill or floor which can fix the iron cone53.

Component3, namely “window ribbing3” is a common window frame or wall which can fix the aluminium alloy track of F shape52.

Component4, namely “curtain of a common roller blind4” is the curtain of a common roller blind which has different options including color, pattern, and transparence and so on. The same or different curtain materials can be jointed together to be one common curtain4by utilizing an adhesive or sewing or ultrasonic welding.

Component12, namely “iron distance-metering runner12” is a thin electroplated iron cylinder having an outer shape which is the same as but smaller than the internal shape of the second circular tube39, and therefore the iron distance-metering runner12can slide in the second circular tube39easily. The iron distance-metering runner12is provided with a groove122outside and therefore can slide along the ribbing391inside the second circular tube39. The iron distance-metering runner12is further provided with a thread121at the centre and therefore can rotate around the iron screw shaft31. The iron distance-metering runner12can break away from or combine with the iron connecting element14, so as to enable the second circular tube39to rotate or to be lifted and move up and down.

Component13, namely “nylon supporting runner13” is a thin nylon cylinder having an outer shape which is the same as but slightly smaller than the internal shape of the second circular tube39, and therefore the iron distance-metering runner12can slide in the second circular tube39easily. The nylon supporting runner13is provided with a groove132outside and therefore can slide along the ribbing391inside the second circular tube39. The nylon supporting runner13is further provided with a circular hole131at the centre and therefore can rotate around the iron connecting element14. The nylon supporting runner13also supports the pressure between the second circular tube39and the iron connecting element14.

Component14, namely “iron connecting element14” is an electroplated cylinder with a projecting ring141at the right end. The external diameter142can match the circular hole131of the nylon supporting runner13. A screw hole143which can match the iron screw shaft31is arranged at one end of the centre of the right side. A square hole144which can match the iron square shaft32is arranged at the centre of the left side. The iron screw shaft31, the iron square shaft32, the ring141and the nylon supporting runner13can be fixed by iron wires passing through the two circular holes145.

Component17, namely “nylon bearing17” is a nylon circular bearing provided with a groove171and a projecting edge172for fixing the ribbing391and section inside the second circular tube39respectively. Two concentric circular holes174having different sizes and enabling the circular iron shaft36to rotate are arranged at the centre of the left end. A circular hole173, the diameter of which is larger than those of the iron screw shaft31and the iron square shaft32, is arranged at the centre of the right end. A right side hole175which can fix the extension column372of the torsion spiral37is provided at the left end of the nylon bearing17.

Component20, namely “special curtain20” is a roller blind curtain formed by vertically jointing two or more roller blind curtains with different properties and each height slightly higher than the window. The width of the special curtain20is smaller than that of the second circular tube39.

Component31, namely “iron screw shaft31” is an electroplated iron screw shaft with its right end cut into a square stem311and a left end hole312arranged at its left end. For example, if the special curtain20is formed by vertically jointing three roller blind curtains, which are slightly higher than the window, the minimum length of the iron screw shaft31can enable the iron distance-metering runner12to rotate, so as to roll up at least two (three minus one) roller blind curtains.

Component32, namely “iron square shaft32” is an electroplated square iron shaft having a right end hole321at its right end.

Component36, namely “iron shaft36” is an electroplated iron circular shaft. The electroplated iron circular shaft has a right end363with a smaller diameter which enables the circular hole174inside the nylon bearing17to rotate, and a left end with a larger diameter and two screw holes362matching the left flexing iron plate49or the right flexing iron plate50. A square hole361enabling the insertion of the left end322of the iron square shaft32or the right square stem311of the iron screw shaft31is provided at the center of the iron shaft36.

Component37, namely “torsion spiral37” is a torsion spiral for providing torsion to the second circular tube39. An extension column372extending radically outward is arranged at the left end of the torsion spiral37. The extension column372is inserted into the hole175of the nylon bearing17, and then fixed by a pinch cock and a self tapping screw. An iron piece is arranged at the right end of the torsion spiral37and a square hole371which is slightly larger than the iron square shaft32is arranged at the centre of the torsion spiral37. A gear group, such as 1:2 can be arranged optionally to reduce the needed revolution time of the torsion spiral.

Component39, namely “a second circular tube39” is an aluminium alloy circular tube having one or two ribbings391inside.

Component49, namely “left flexing iron plate49” is a first connection plate of Z shape491. The included angle between the left flexing iron plate49and the first bending plate492connected together is a right angle, and the included angle between the first bending plate492and the third connection plate493connected together is a right angle. The first connection plate491is provided with two holes4911and the first bending plate492is provided with two holes4921while the third connection plate493is provided with a large circular hole4931and two holes4932.

Component50, namely “right flexing iron plate50” is a second connection plate of Z shape501. The included angle between the right flexing iron plate50and the second bending plate502connected together is a right angle, and the included angle between the second bending plate502and the fourth connection plate503connected together is a right angle. The second connection plate501is provided with two holes5011and the second bending plate502is provided with two holes5021while the fourth connection plate503is provided with a large circular hole5031and two holes5032. The left flexing iron plate49is the mirror of the right flexing iron plate50.

Component51, namely “iron baffle51” is a piece of long iron sheet having two holes511at both ends. When the special curtain20lifts the second circular tube39, the moment of inertia of the iron baffle51is approximately the same as those of the second circular tube39and its internal components. The moment of inertia can be adjusted by changing the height or the thickness of the iron baffle. The left and right ends of the iron baffle51can be covered with a nylon sheath to reduce the noise produced when it collides with the aluminium alloy track of F shape52. An iron horn or an iron groove can be used to enhance strength.

Component52, namely “aluminium alloy track of F shape52” is a side trough of F shape. The left and right ends of the iron baffle51can insert into the groove of U shape522. A screw is used to fix the aluminium alloy track of F shape52to the window ribbing3via passing through the groove of U shape522. The aluminium alloy track of F shape52has two flat surfaces which are not reflective, such as black, to eliminate the reflected sunshine.

Component53, namely “iron cone53” can be fixed to the windowsill2by a flat screw passing through a hole532. The horizontal height of the iron cone53can be adjusted by a circle at the bottom. A cone531can pass through the large circular hole5031of the right flexing iron plate50(the large circular4931of the left flexing iron plate49).

Component54, namely “nylon sheet54” is a piece of rectangular nylon sheet which can reduce the noise produced when the left flexing iron plate49(and right flexing iron plate50) strikes the iron cone53. The nylon sheet54is provided with three circular holes, the position and diameter of which are the same as those of the third connection plate493of the left flexing iron plate49(the fourth connection503of the right flexing iron plate50), but among which the central hole can match the upward flat screw. The nylon sheet54is optional.

Component55, namely “supporting aluminium corner55” is an aluminium alloy corner. A hole is arranged at the bottoms of the left and right ends, respectively.

Component56, namely “security hard frosted screen56” is a hard nylon frosted screen fixed on the top of the iron baffle51. Such arrangement can prevent children or users from putting their hands or fingers into the rolling up device. This component is optional.

Component57, namely “wool top57” is a common light-blocking wool top which is fixed at the bottom of the iron baffle51and covers the gap between the iron baffle51and the windowsill2. The wool top57is optional.

A first specific embodiment will be described as follows.

A common roller blind device is assembled without utilizing the common curtain4and the bottom bar5. By means of an adhesive or a sewing machine, three different roller blind curtains are connected into a special curtain20, the upper end of which is fixed to the first circular tube1of a common roller blind. Then the special curtain20is rolled up to the first circular tube1of the common roller blind, only hanging the special curtain20of approximately 300 mm.

The left end of the iron screw shaft31is rotated into the screw hole121of the iron distance-metering runner12. The circular hole131of the nylon supporting runner13slides into the external diameter142of the iron connecting element14, and a circle is added to the left side of the nylon supporting runner13. The left end of the screw shaft31is rotated into the right end of the iron connecting element14while the right end of the iron square shaft32is inserted into the square hole144at the left end of the iron connecting element14. Components14,32,31and the circle are fixed by the iron wire that passes through the two circular holes145of the iron connecting element14, the right end hole321of the iron square shaft32and the left end hole312of the iron screw shaft31. Then the iron distance-metering runner12is rotated to close with the iron connecting element14. Supposing that the special curtain20is made of N curtains, therefore, when the iron distance-metering runner12is rotated to be away from the iron connecting element14, the revolution number is the one that ensures the special curtain20to be rolled up onto the second circular tube39by a minimum of 300 mm and a maximum of the topmost (N-1) curtains.

The left end post372of the torsion spiral37is fixed in the right side hole175of the left nylon bearing17, and then fixed by a pinch cock and a self tapping screw, while the right end square hole slides into the iron square shaft32.

The circular iron shaft36and the nylon sheet54are fixed to the left flexing iron plate49and the right flexing iron plate50via a countersink head screw, a washer and a screw cap.

The left end of the iron square shaft32passes through the left nylon bearing17, then inserts into the square hole361of the circular iron shaft36. Then the installed iron screw shaft31, iron distance-metering runner12, iron connecting element14, nylon supporting runner13, iron square shaft32, torsion spiral37and left nylon bearing17slide from the left side along the ribbing391inside the second circular tube39. The right nylon bearing17is fixed to the right side of the second circular tube39. The square stem311at the right end of the iron screw shaft31is inserted into the square hole361of the right circular iron shaft36.

The iron baffle51, nylon sheet54and aluminium alloy corner55are fixed to the left flexing iron plate49and the right flexing iron plate50via a screw or a rivet. The nylon supporting runner13is fixed by the flat screw passing through the second circular tube39. The edge of the screw is firstly abraded to avoid its projection from the second circular tube39.

The iron distance-metering runner12is rotated to close with the iron connecting element14and to enable the torsion spiral37to create a torsion. By an adhesive tape, the lower end of the special curtain20is fixed to the second circular tube39which is fixed to the left and right flexing iron plates49,50by an adhesive tape.

When related common roller blind device is installed at building sites, the position of the U shape groove of the aluminium alloy track52of F shape can hitch the both ends of the iron baffle tightly. When the aluminium alloy track52of F shape has been fixed to the window frame3by a self tapping screw or an adhesive, the adhesive tape which fixes the second circular tube39to the left and right flexing iron plate49,50is loosened.

The position of the iron cone53can match the large circular hole5031of the right flexing iron plate50and the large circular hole4931of the left flexing iron plate549respectively. The horizontal height of the windowsill2is adjusted by a large circle, and then the iron cone53is fixed to the windowsill2by a screw.

An “up stop position” is set for the roller blind which is controlled and the first circular tube1of which is rotated until the Nth curtain of the special curtain20is shown. Then a “low stop position” is set for the roller blind.

When the second circular tube39is hung by the special curtain20, the weight of the iron baffle51is maintained approximately stable with the second circular tube39and its internal components by taking the right flexing iron plate50or the left flexing iron plate49as the lever and taking the special curtain20as the fulcrum. On the other hand, the locations and weights of the torsion spiral37, the iron distance-metering gear12, the nylon supporting runner13and the iron connecting element14are maintained approximately stable by taking the second circular tube39as the lever and taking the centre of the special curtain20as the fulcrum.

Options such as the security hard frosted screen56and the wool top57are fixed as required.

Referring to the accompanying drawings33,33A,33B,33C,34,34A,34B and34C, supposing that the special curtain20has three different curtains: a top curtain201, a middle curtain and a bottom curtain203. The height of the window is “h”.

In steps1-3, the torsion of the torsion spiral37is smaller than that produced by the weight of the second circular tube39and its internal components. The iron distance-metering runner12is close to the iron connecting element14and the second circular tube39is hung by the special curtain20.

In steps4-7, the left and right flexing iron plates49,50rest on the iron cone53. The first circular tube is rotated to pull down the special curtain20. Then the torsion spiral37can rotate the second circular tube39to roll up the special curtain20. During this, the iron distance-metering runner12is rotated away from the iron connecting element14.

In steps8-10, the first circular tube1is rotated so that the pulled special curtain20can pull the second circular tube30to rotate. At this time, the torsion of the torsion spiral37is smaller than that produced by the special curtain20. The iron distance-metering runner12is rotated close to the iron connecting element14again.

In steps11-13, the second circular tube39is hung by the special curtain20. At this time, the torsion of the torsion spiral37is smaller than that produced by the special curtain20. The iron distance-metering runner12is close to the iron connecting element14.

If necessary, a very thin curtain, such as curtains of HAVERKAMP OPALFILM, can be selected for reducing the thickness of the curtain.

Second embodiment of the special curtain: curtains with different colors or patterns

A user can choose different curtains to be the top curtain201, the middle curtain202and the bottom curtain203based on the color and pattern and so on.

Third embodiment of the special curtain: curtains with different transparences are automatically selected according to the intensity of sunshine.

A user can choose different curtains to be the top curtain201, the middle curtain202and the bottom curtain203according to different transparences. For example, the transparence of the top curtain is 1%, the transparence of the middle curtain is 3%, and the transparence of the bottom curtain is 10%, respectively. In addition, a system that can detect the intensity of sunshine and rotate the motor to a pre-arranged position can be selected and used. Such system includes SMI motor, SOMFY ILT motor, LonWorks control system, Mechoshade control system and so on.