TWI884069B - Roller curtain auxiliary retracting device - Google Patents

Abstract

An auxiliary rolling device for a rolling curtain is used for pulling down and pushing up the curtain. The auxiliary rolling device comprises a body; at least one first coil spring sleeved on one side of the body; a transmission body sleeved on the same side of the body as the first coil spring and sleeved with the first coil spring, one end of the first coil spring is embedded in the transmission body, and a shaft rod is arranged on one side of the transmission body; at least one second coil spring sleeved on the shaft rod; A driving body, the interior of which is used to accommodate the shaft rod and embed one end of the second coil spring; and an axis cover, which is sleeved on one end of the shaft rod, and then fixed to the axis cover and one end of the driving body and the other end of the driving body by two fixing members; thereby, when the rolling curtain is pulled down, the resistance of the first coil spring to rotate on one side of the body is greater than the resistance of the second coil spring to rotate on the shaft rod when the rolling curtain is pushed up, so that the balance of pulling down and pushing up can be maintained.

Description

Roller curtain auxiliary retracting device

The present invention is used for roller blinds; in particular, it refers to an auxiliary rolling device used for pulling down and pushing up the roller blinds.

Please refer to Figure 1. There is a rolling curtain 1 including an upper rail 10 fixed above the window, a tube body 101, a reeling device 11 installed at one end of the tube body 101 and having a force storage coil spring 111, a resistance device 12 installed in the tube body 101 and opposite to one end of the reeling device 11, two fixing brackets 13 for pivotally connecting the reeling device 11 and the resistance device 12 and fixed on both sides of the upper rail 10, a lower rail 14 spaced below the upper rail 10, and a curtain 15, wherein the fixing bracket 13 at the left end is provided with a bracket adjustment plate 131 pivotally connected to the reeling device 11.

When installing the roller curtain 1, the force storage coil spring 111 is first rotated and adjusted to an appropriate preset number of working turns, such as 10 turns, and the accumulated elastic force of the force storage coil spring 111 through the bracket adjustment plate 131, and then the resistance device 12 is used to achieve balance.

Referring to FIG. 2 and FIG. 3, the resistance device 12 includes a body 121, at least one spring 122, a transmission body 123, and a driving body 124. A convex portion 1211 and a convex portion 1212 connected to one end of the convex portion 1211 are provided on one side of the body 121. In this embodiment, the spring 122 is two convex portions 1212 adjacent to each other and sleeved on the body 121. The two ends of the spring 122 each have a first convex point 122. 1 and a second protrusion 1222, the transmission body 123 is sleeved on the same side of the convex embedding portion 1211 and the two springs 122 are inserted, the two first protrusions 1221 and the two second protrusions 1222 of the two springs 122 are respectively embedded in a groove 1231 of the transmission body 123, one end of the transmission body 123 has a shaft 1232, the driving body 124 is sleeved on one end of the shaft 1232, and is embedded with the tube 101.

Referring to FIG. 1 and FIG. 3 again, when in use, the lower rail 14 is pulled down or pushed up by the hand, and the curtain 15 can be stretched downward by the force of the hand or rolled up by the elastic force accumulated by the force storage coil spring 111, and the tube body 101 and the driving body 124 of the resistance device 12 rotate together, and the driving body 124 drives the transmission body 123 to push the first protrusion 1221 or the first protrusion 1221 of the spring 122 through the groove 1231. The second protrusion 1222 tightens the protrusion 1212 of the main body 121 to increase resistance, so that the curtain 15 provides half resistance when pulling down and pushing up, and achieves balance through the resistance device 12. At this time, the elastic force accumulated by the force storage coil spring 111 will increase or decrease along with the curtain 15. When the user releases his hand at the required height, the roller curtain 1 returns to the balanced state of force application, so that the curtain 15 is immediately positioned.

Referring to FIG. 1 and FIG. 4 again, the safe working number of turns of the accumulated elastic force of the force storage coil spring 111 has an upper limit, for example, 80 turns. The maximum length of the curtain 15 that can be carried within the safety range is 70 turns. When the length of the curtain 15 is longer, for example, 75 turns, when the curtain 15 is fully stretched, the working number of turns of the force storage coil spring 111 will reach 85 turns. Alternatively, if the curtain 15 is made of a heavier material, the preset working number of turns must be increased to, for example, 15 turns during installation. Then, when the curtain 15 is fully stretched, the working number of turns of the force storage coil spring 111 will reach 85 turns. Although both can still be stretched and retracted for use, they have exceeded the upper limit of the safe working number of turns of 80 turns of the force storage coil spring 111. Since the force storage coil spring 111 is in a working cycle that exceeds the load for a long time, it is easy to cause the elastic fatigue damage of the force storage coil spring 111 and fail to rewind smoothly, thereby shortening the service life of the force storage coil spring 111. It is necessary to further improve it.

The invention aims to solve the problem that when the curtain cloth is longer or the material is heavier, it is easy to cause the elastic fatigue of the power storage spring of the winding device, shortening the service life of the power storage spring.

To achieve the above-mentioned purpose, the present invention provides an auxiliary rolling device for a rolling curtain, which is used for pulling down and pushing up the curtain. The auxiliary rolling device includes: a body; at least one first coil spring, which is sleeved on one side of the body; a transmission body, which is sleeved on the same side of the body as the first coil spring and inserts the first coil spring, one end of the first coil spring is embedded in the transmission body, and a shaft rod is arranged on one side of the transmission body; at least one second coil spring, which is sleeved on the shaft rod; a driving body, the interior of which is used to accommodate the shaft rod and one end of the second coil spring is embedded; and an axis cover, which is sleeved on one end of the shaft rod and abuts against the driving body, and then fixed with two The components are respectively fixed to the shaft cover and one end of the transmission body and to the other end of the transmission body; thereby, when the rolling curtain is pulled down, the second coil spring is tightly fixed to the shaft rod and drives the transmission body to rotate, and the transmission body rotates and drives the first coil spring to relax, so that the first coil spring has a large resistance to rotation on one side of the body, and the resistance is used as a balance when the rolling curtain is stopped when it is pulled down to position, and when the rolling curtain is pushed up, the second coil spring is relaxed and rotates on the shaft rod. When the transmission body is driven, the first coil spring is tightly fixed to one side of the body, so that the transmission body does not rotate, and the second coil spring has a small resistance to rotation on the shaft rod. The small resistance makes it easy to retract the rolling curtain.

Furthermore, the body includes a convex stop, a first convex portion and a second convex portion connected to and opposite to the two sides of the convex stop, the first convex portion has a first accommodation chamber, the second convex portion has a second accommodation chamber, a convex inlay is connected between the convex stop and the first convex portion, and the convex inlay has an axial hole that penetrates the first accommodation chamber and the second accommodation chamber.

Furthermore, the first coil spring is sleeved on the first protrusion on one side of the main body, and one end of the first coil spring has a first protrusion.

Furthermore, the first coil spring is two adjacent to each other.

Furthermore, the transmission body further includes a fixing part fixed to the convex inlay on the other side of the transmission body, the fixing part is provided with an internal space having a convex shaft part, and a groove on the outer periphery of the fixing part, the internal space is provided for the first convex part to be on the same side as the first coil spring and insert the first coil spring, the convex shaft part is a circular shaft, which penetrates the shaft hole of the convex stop part, and then one of the fixing parts passes through the second chamber and is fixed to the convex shaft part, and the groove of the fixing part is provided for the first convex end of the first coil spring to be embedded.

Furthermore, the shaft includes a first rod, a second rod connected to one end of the first rod, and a third rod connected to one end of the second rod. The first rod and the second rod are circular in shape, the third rod is hexagonal in shape, and the outer diameter of the second rod is smaller than that of the first rod, and the outer diameter of the third rod is smaller than that of the second rod.

Furthermore, the second coil spring is sleeved on the second rod of the shaft, and one end of the second coil spring has a second protruding end.

Furthermore, the driving body includes a convex portion and at least one limiting groove, the convex portion has an accommodation space, and an inner baffle and a through hole located at the bottom of the accommodation space, the accommodation space is for the second rod of the shaft to be on the same side as the second coil spring and to insert the second coil spring, the inner baffle is for the second coil spring to abut, the through hole is connected to the accommodation space, and the second rod of the shaft is extended, a groove is provided on the outer periphery of the convex portion, and the second convex end of the second coil spring is embedded, and the limiting grooves are two opposite.

Furthermore, the shaft cover includes a convex cover wall and a cap body connected to one side of the convex cover wall. The convex cover wall and the cap body have a hexagonal hole inside for the third rod of the shaft to be correspondingly engaged. The cap body has a hexagonal shape and an outer diameter smaller than the outer diameter of the convex cover wall. One end of the cap body is provided with a hole communicating with the hexagonal hole. The inner diameter of the hole is smaller than the inner diameter of the hexagonal hole. Another fixing member passes through the hole of the cap body and is fixed to the third rod of the shaft, so that the shaft cover abuts against the driving body.

Furthermore, the first coil spring has a resistance distribution of 60% to 80% when rotating on one side of the body, and the second coil spring has a resistance distribution of 40% to 20% when rotating on the shaft.

Through the above disclosure of the present invention, compared with the existing ones, it has the following characteristics:

The invention is used for the auxiliary winding device for the pull-down positioning and push-up positioning of the rolling curtain. When the rolling curtain is pulled down, the resistance of the first winding spring rotating on one side of the main body is greater than the resistance of the second winding spring rotating on the shaft when the rolling curtain is rolled up, which can maintain the balance of pulling down and pushing up. If the curtain cloth is longer or the material is heavier, the power storage spring is not easy to exceed the most appropriate number of working turns, and can bear the curtain cloth with longer winding length or heavier material, avoid the accelerated damage of the power storage spring due to elastic fatigue, and extend the service life of the power storage spring.

(Current)

1: Roller blinds

10: On track

101: Tube body

11: Reeling device

111: Charged coil spring

12: Resistance device

121:Entity

1211: Embossed part

1212:convex part

122: Spring

1221: First bulge

1222: Second bulge

123: Transmission body

1231: Slot

1232: Axis rod

124: Driving body

13:Fix bracket

131: Bracket adjustment plate

14: Lower track

15: Curtains

(This invention)

2: Roller blinds

21: On track

22: Tube body

221: Limiting convex body

222: Embedded groove

23: Reeling device

231:Fixed column

232: Charged coil spring

233: Coil spring accumulator

24: Reeling control device

241: Square shaft

242: Fixed axis

25:Fixed bracket

251: Fixed body

252: Stand

253: Bracket adjustment plate

26: Lower track

261: Slot

27: Curtains

271: Starting point

272:Terminal

3: Auxiliary reeling device

4: Body

41: convex stopper

411: Inlay

412: Shaft hole

42: First convex part

421: First Chamber

43:Second convex part

431: Second Chamber

5: First coil spring

51: First convex end

6: Transmission body

61: Shaft

611: First rod

612: Second rod

613: Third rod

62:Fixed part

621:Inner space

622: Camshaft

623: Slot

7: Second coil spring

71: Second convex end

8: Driving body

81:Protruding joint

811: Accommodation space

812: Inner wall

813:Piercing

814: Slot

82: Limiting slot

9: Shaft cover

90:Fixer

91:convex wall

92: Cap body

93: Hexagonal hole

94: Hole

Figure 1: A three-dimensional exploded view of the existing roller shutter and resistance device.

Figure 2: A three-dimensional exploded view of the resistance device in Figure 1.

Figure 3: A schematic diagram of the action of the resistance device in Figure 1.

Figure 4: A schematic diagram showing that the roller blind in Figure 1 cannot be rolled up smoothly due to elastic fatigue damage of the power storage spring.

Figure 5: A three-dimensional exploded view of the roller blind and the auxiliary rolling device of the present invention.

Figure 6: A three-dimensional exploded view of the auxiliary reeling device in Figure 5.

Figure 7: A three-dimensional exploded view of the auxiliary reeling device in Figure 6 from another angle.

Figure 8: A cross-sectional view of the auxiliary reeling device assembly of the present invention.

Figure 9-1: A schematic diagram of the roller curtain of the present invention stretching the curtain fabric downward.

Figure 9-2: A schematic diagram of the auxiliary reeling device in Figure 9-1 in the stretched state.

Figure 10-1: A schematic diagram of the rolling curtain cloth on the roller curtain of the present invention.

Figure 10-2: A schematic diagram of the auxiliary reeling device in Figure 10-1 in the reeling state.

The detailed description and technical contents of this invention are now described as follows with accompanying drawings:

Please refer to Figures 5 and 6 and Figures 9-1 and 10-1. The present invention is an auxiliary rolling device for a rolling curtain, an auxiliary rolling device 3 used for pulling down and pushing up a rolling curtain 2. The rolling curtain 2 includes an upper rail 21 fixed above the window, a tube 22, a rolling device 23 installed at one end of the tube 22, and a The reeling control device 24 is opposite to one end of the reeling device 23, the auxiliary reeling device 3 is installed in the tube body 22 and connected to one end of the reeling device 23, the reeling device 23 and the reeling control device 24 are axially connected and two fixing brackets 25 are set and fixed on both sides of the upper rail 21, a lower rail 26 is spaced below the upper rail 21, and a curtain 27. The tube body 22 is provided with a limiting protrusion 221, and the limiting protrusion 221 is used for the reeling device 23, the auxiliary reeling device 3 and the reeling control device 24 to be assembled and fixed. A groove 222 is provided above the limiting protrusion 221, and a starting end 271 of the curtain 27 is embedded in the groove 222 and is wound around the outer surface of the tube body 22 by the curtain 27, so that the curtain 27 is driven by the tube body 22 to rise and fall. The surface of the lower rail 26 is provided with a groove 261, and a terminal end 272 of the curtain 27 is inserted and fixed in the groove 261.

The winding device 23 is arranged at one end of the upper rail 21. A square fixing column 231 is arranged at one end of the winding device 23. The fixing column 231 is axially connected to the fixing bracket 25 at the left end. A force storage coil spring 232 is arranged at the other end of the winding device 23. The force storage coil spring 232 is driven to rotate by a coil spring accumulator 233 to increase the number of working turns to accumulate elastic force. When the curtain sheet 27 is pulled downward by the upper rail 21, the force storage coil spring 232 will be wound more and more tightly. The winding device 23 is a known component and will not be described in detail here.

The retracting control device 24 is arranged at the other end of the upper rail 21. A square shaft 241 is arranged at one end of the retracting control device 24. The square shaft 241 is pivotally connected to the fixed bracket 25 at the right end. A hexagonal fixed shaft 242 is arranged at the other end of the retracting control device 24. The retracting control device 24 is a known component and will not be described in detail here.

The two fixed brackets 25 correspond to each other and are used to be fixed on both sides of the upper rail 21. The two fixed brackets 25 respectively include a fixed body 251 installed on the side of the upper rail 21 and a stand 252 connected to the bottom of the fixed bodies 251. Among them, the fixed bracket 25 at the left end is provided with a bracket adjustment plate 253 for the axial positioning of the fixed column 231. The bracket adjustment plate 253 is used to rotate and adjust the force storage coil spring 232 to an appropriate preset number of working turns. The two fixed brackets 25 are known components and will not be described in detail here.

Please refer to Figures 5, 6, 7 and Figures 8 to 10-2, the auxiliary winding device 3 includes a body 4, at least one first winding spring 5, a transmission body 6, at least one second winding spring 7, a driving body 8 and a shaft cover 9. The first coil spring 5 is sleeved on one side of the body 4, the transmission body 6 is sleeved on the same side of the body 4 as the first coil spring 5 and inserts the first coil spring 5, one end of the first coil spring 5 is embedded in the transmission body 6, a shaft 61 is provided on one side of the transmission body 6, the second coil spring 7 is sleeved on the shaft 61, the interior of the driving body 8 is used to accommodate the shaft 61 and allow one end of the second coil spring 7 to be embedded, the shaft cover 9 is sleeved on one end of the shaft 61 and abuts against the driving body 8, and then two fixing members 90 are respectively fixed to the shaft cover 9 and one end of the transmission body 6 and fixed to the other end of the transmission body 6; thereby, the When the rolling curtain 2 is pulled down, the second coil spring 7 is fastened to the shaft 61 and drives the transmission body 6 to rotate. The transmission body 6 rotates and drives the first coil spring 5 to relax, so that the resistance of the first coil spring 5 to rotate on the side of the main body 4 is large, and the resistance is used as a balance when the rolling curtain 2 is pulled down and positioned. When the rolling curtain 2 is pushed up, the second coil spring 7 is relaxed and rotates on the shaft 61. When the transmission body 6 is driven, the first coil spring 5 is fastened to the side of the main body 4, so that the transmission body 6 does not rotate, and the resistance of the second coil spring 7 to rotate on the shaft 61 is small. The small resistance makes it easy to retract the rolling curtain 2.

In this embodiment, the body 4 includes a convex stop 41, a first convex portion 42 and a second convex portion 43 connected to and opposite to the two sides of the convex stop 41. In actual structure, the first convex portion 42 has a first chamber 421, and the second convex portion 43 has a second chamber 431. A convex inlay 411 is connected between the convex stop 41 and the first convex portion 42, and the convex inlay 411 has an axial hole 412 that is connected to the first chamber 421 and the second chamber 431.

The first coil spring 5 is sleeved on the first protrusion 42 on one side of the body 4, and one end of the first coil spring 5 has a first protrusion 51. In this embodiment, the first coil spring 5 is two adjacent to each other, and each of the first coil springs 5 is provided with a first protrusion 51.

The transmission body 6 further includes a fixing portion 62 on the other side of the transmission body 6 and fixed to the convex inlay 411. The fixing portion 62 is provided with an inner space 621 having a convex shaft portion 622 and a groove 623 on the outer periphery of the fixing portion 62. The inner space 621 allows the first convex portion 42 to be on the same side as the first coil spring 5 and insert the first coil spring 5. The convex shaft portion 622 is a circular shaft that penetrates the shaft hole 412 of the convex stop portion 41, and then one of the fixing members 90 is used as a screw member to pass through the second accommodation chamber 431 and be locked to the convex shaft portion 622. The groove 623 allows the first convex end 51 of the first coil spring 5 to be embedded. In one embodiment, the shaft 61 includes a first rod 611, a second rod 612 connected to one end of the first rod 611, and a third rod 613 connected to one end of the second rod 612. The first rod 611 and the second rod 612 are circular in shape, the third rod 613 is hexagonal in shape, and the outer diameter of the second rod 612 is smaller than the outer diameter of the first rod 611, and the outer diameter of the third rod 613 is smaller than the outer diameter of the second rod 612.

The second coil spring 7 is sleeved on the second rod 612 of the shaft 61, and one end of the second coil spring 7 has a second protruding end 71.

The driving body 8 includes a convex portion 81 and at least one limiting groove 82. The convex portion 81 has a containing space 811, and an inner blocking wall 812 and a through hole 813 located at the bottom of the containing space 811. The containing space 811 allows the second rod 612 of the shaft 61 to be on the same side as the second coil spring 7 and insert the second coil spring 7. The inner blocking wall 812 allows the second coil spring 7 to abut against the second coil spring 7. The through hole 813 is connected to the containing space 811 to allow the second rod 612 of the shaft 61 to extend through. In this embodiment, a groove 814 is provided on the outer periphery of the convex portion 81 for the second convex end 71 of the second coil spring 7 to be embedded. The limiting groove 82 is two relative limiting protrusions 221 embedded in the tube body 22, so that the tube body 22 can drive the driving body 8 to rotate along the shaft 61 of the transmission body 6.

The shaft cover 9 includes a convex cover wall 91 and a cap body 92 connected to one side of the convex cover wall 91. The convex cover wall 91 and the cap body 92 have a hexagonal hole 93 inside for the third rod 613 of the shaft 61 to be correspondingly embedded. The cap body 92 has a hexagonal shape and an outer diameter smaller than the outer diameter of the convex cover wall 91. A hole 94 communicating with the hexagonal hole 93 is set at one end of the cap body 92, and the inner diameter of the hole 94 is smaller than the inner diameter of the hexagonal hole 93. In this embodiment, another fixing member 90 is used as a screw member to pass through the hole 94 of the cap body 92 and lock the third rod 613 of the shaft 61, so that the shaft cover 9 abuts against the driving body 8.

Referring again to FIGS. 5 to 8 and in conjunction with FIGS. 9-1 and 10-1, when the rolling curtain 2 is assembled, the force storage coil spring 232 is first rotated and adjusted to an appropriate preset number of working turns by the bracket adjustment plate 253, and the elastic force accumulated by the winding device 23 is balanced with the resistance provided by the auxiliary winding device 3, so that when the rolling curtain 2 is pulled down, the resistance of the first coil spring 5 rotating on one side of the body 4 is greater than the resistance of the second coil spring 7 rotating on the shaft 61 when the rolling curtain 2 is pushed up, so as to maintain the pull-down and The curtain 27 is then arranged between the tube body 22 and the lower rail 26, the retracting device 23, the auxiliary retracting device 3 and the retracting control device 24 are arranged in the tube body 22, and the retracting device 23 and the auxiliary retracting device 3 are driven by the tube body 22 to rotate, so that the fixed column 231 of the retracting device 23 is pivoted to the fixed bracket 25 at the left end, and the square shaft 241 of the retracting control device 24 is pivoted and extends out of the fixed bracket 25 at the right end to assemble the rolling curtain 2.

Referring again to Figures 5, 8, 9-1 and 9-2, when the user unfolds the curtain 27 and pulls down the lower rail 26 by hand, the driving body 8 pushes the second protruding end 71 of the second coil spring 7 through the groove 814 of the protruding portion 81 to tighten it, and the second coil spring 7 is fastened to the shaft 61 and drives the transmission body 6 to rotate. The transmission body 6 rotates and drives the first coil spring 5 to relax, so that the first coil spring 5 has a large resistance to the rotation of the first protruding portion 42 on one side of the body 4, and the resistance is used as a balance when the curtain 27 of the roller curtain 2 is pulled down and positioned. In this embodiment, the resistance of the first coil spring 5 to the rotation on one side of the body 4 is distributed to 60% to 80%.

Referring again to Figures 5, 8, 10-1 and 10-2, when the user rolls up the curtain 27, he pushes up the lower rail 26 with his hand, and the driving body 8 pushes the second coil spring 7 to relax it and rotate on the second rod 612 of the shaft 61. When the transmission body 6 is driven by the driving body 8, the first coil spring 5 is fastened to the first protrusion 42 on one side of the body 4, so that the transmission body 6 does not rotate, and the resistance of the second coil spring 7 to the rotation of the second rod 612 of the shaft 61 is small. The small resistance makes it easy to roll up the curtain 27. When the user lets go, the curtain 27 will fall down after being positioned, and then achieve balance through the resistance of the first coil spring 5. In this embodiment, the resistance of the second coil spring 7 to the rotation of the shaft 61 is distributed between 40% and 20%.

As mentioned above, the second coil spring 7 of the present invention is smaller than the first coil spring 5. When the first coil spring 5 pulls down the curtain cloth 27, it generates 60% to 80% of resistance, which is greater than the 50% resistance generated by the existing resistance device 12. The curtain cloth 27 with a longer length or heavier material can be carried. When the second coil spring 7 pushes up the curtain cloth 27, it generates 40% to 20% of resistance, which is greater than the 50% resistance generated by the existing resistance device 12. 2 produces 50% less resistance, and the force storage spring 232 is easy to reel in. If the curtain cloth 27 is longer or made of heavier material, the force storage spring 232 is not likely to exceed the upper limit of the safe working number of turns, and can carry the curtain cloth 27 with longer reeling length or heavier material, avoiding the accelerated damage of the force storage spring 232 due to elastic fatigue, and extending the service life of the force storage spring 232.

However, the above is only a preferred embodiment of the present invention, and its purpose is to enable those familiar with the art to understand the content of the present invention and implement it accordingly, and it is not used to limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications made according to the shape, structure and features described in the scope of the application of the present invention should be included in the scope of the patent application of the present invention.

3: Auxiliary reeling device

4: Body

41: convex stopper

411: Inlay

42: First convex part

43:Second convex part

431: Second Chamber

5: First coil spring

51: First convex end

6: Transmission body

61: Shaft

612: Second rod

613: Third rod

62:Fixed part

621:Inner space

622: Camshaft

623: Slot

7: Second coil spring

71: Second convex end

8: Driving body

81:Protruding joint

811: Accommodation space

812: Inner wall

814: Slot

82: Limiting slot

9: Shaft cover

90:Fixer

91:convex wall

92: Cap body

93: Hexagonal hole

Claims (10)

An auxiliary rolling device for a rolling curtain is used for pulling down and pushing up the curtain. The auxiliary rolling device comprises: a main body; at least one first coil spring, sleeved on one side of the main body; a transmission body, sleeved on the same side of the main body as the first coil spring and sleeved into the first coil spring, one end of the first coil spring is embedded in the transmission body, and a shaft is provided on one side of the transmission body; at least one second coil spring, sleeved on the shaft; a driving body, the shaft is accommodated in its interior and one end of the second coil spring is embedded; and A shaft cover is sleeved on one end of the shaft rod and abuts against the driving body, and two fixing members are respectively fixed to the shaft cover and one end of the driving body and fixed to the other end of the driving body; thereby, when the roller blind is pulled down, the second coil spring is fastened to the shaft rod and drives the driving body to rotate, and the driving body rotates and drives the first coil spring to relax, so that the first coil spring is on one side of the main body. The resistance to rotation is large, and the resistance is used as a balance when the rolling curtain is pulled down and positioned. When the rolling curtain is pushed up, the second coil spring is relaxed and rotates on the shaft. When the transmission body is driven, the first coil spring is fastened to one side of the body, so that the transmission body does not rotate. Then the resistance of the second coil spring to the rotation of the shaft is small, and the resistance is small and the rolling curtain is easy to retract. The roller blind auxiliary rolling device as described in claim 1, wherein the main body includes a convex baffle, a first convex portion and a second convex portion connected to and opposite to the two sides of the convex baffle, the first convex portion has a first receiving chamber, the second convex portion has a second receiving chamber, a convex inlay is connected between the convex baffle and the first convex portion, and the convex inlay has an axial hole that penetrates the first receiving chamber and the second receiving chamber. As described in claim 2, the auxiliary rolling device of the rolling curtain, wherein the first rolling spring is sleeved on the first protrusion on one side of the main body, and one end of the first rolling spring has a first protrusion. A roller curtain auxiliary rolling device as described in claim 3, wherein the first winding spring is two adjacent to each other. As described in claim 4, the auxiliary rolling device of the rolling curtain, wherein the transmission body also includes a fixing part on the other side of the transmission body and fixed to the convex embedding body, the fixing part is provided with an internal space having a convex shaft part, and a groove on the outer periphery of the fixing part, the internal space is for the first convex part to be on the same side as the first coil spring and to insert the first coil spring, the convex shaft part is a circular shaft, which passes through the shaft hole of the convex block part, and then one of the fixing parts passes through the second chamber and is fixed to the convex shaft part, and the groove of the fixing part is for the first convex end of the first coil spring to be embedded. An auxiliary rolling device for a rolling curtain as described in claim 5, wherein the shaft comprises a first rod, a second rod connected to one end of the first rod, and a third rod connected to one end of the second rod, the first rod and the second rod are circular in shape, the third rod is hexagonal in shape, the outer diameter of the second rod is smaller than the outer diameter of the first rod, and the outer diameter of the third rod is smaller than the outer diameter of the second rod. As described in claim 6, the auxiliary rolling curtain device, wherein the second coil spring is sleeved on the second rod body of the shaft rod, and one end of the second coil spring has a second protruding end. As described in claim 7, the auxiliary rolling device of the rolling curtain, wherein the driving body includes a convex portion and at least one limiting groove, the convex portion has a accommodating space, and an inner blocking wall and a through hole located at the bottom of the accommodating space, the accommodating space is for the second rod body of the shaft rod to be on the same side as the second coil spring and to insert the second coil spring, the inner blocking wall is for the second coil spring to abut, the through hole is connected with the accommodating space for the second rod body of the shaft rod to extend through, a groove is provided on the outer periphery of the convex portion for the second convex end of the second coil spring to be embedded, and the limiting grooves are two opposite ones. An auxiliary rolling curtain device as described in claim 8, wherein the shaft cover includes a convex cover wall and a cap body connected to one side of the convex cover wall, the convex cover wall and the cap body have a hexagonal hole inside for the third rod of the shaft rod to be correspondingly engaged, the cap body has a hexagonal shape and an outer diameter smaller than the outer diameter of the convex cover wall, a hole communicating with the hexagonal hole is provided at one end of the cap body, the inner diameter of the hole is smaller than the inner diameter of the hexagonal hole, and another fixing member passes through the hole of the cap body and is fixed to the third rod of the shaft rod, so that the shaft cover abuts against the driving body. As described in claim 1, the auxiliary rolling device of the rolling curtain, wherein the resistance distribution of the first rolling spring on the side of the main body is 60% to 80%, and the resistance distribution of the second rolling spring on the shaft is 40% to 20%.

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