TW202348886A - Small roller blind power auxiliary device including a fixed assembly and a transmission assembly - Google Patents

Abstract

A small roller blind power auxiliary device is provided. The power auxiliary device includes a fixed assembly and a transmission assembly. The fixed assembly includes a fixed base and an upper cover that covers the fixed base. The transmission assembly includes a power part having a gear, a variable-speed part having a large variable-speed gear meshed with the gear and a small variable-speed gear connected to the top of the large variable-speed gear, a transmission part having a first transmission gear meshed with the speed change gear and a second transmission gear not meshed with the first transmission gear; and a double spring sheet having two ends respectively connected to the transmission part. Thereby, the variable-speed part shortens the length of the double spring sheet and reduces the curled volume of the double spring sheet so that it can be applied to a smaller diameter of the small roller blinds, and the small roller blinds can achieve the retracting function through the power auxiliary device and the small coil spring.

Description

Small roller blind power auxiliary device

The invention relates to a power auxiliary device, in particular to a small roller shutter power auxiliary device.

The use of curtains for sunshade or decoration in homes and offices has become a very common phenomenon. However, for the way of opening and closing curtains, roller blinds 1 are mostly used. Please refer to Figures 1 to 3. The roller blinds 1 have a track. 11. A pipe body 12 and two fixed brackets 13 respectively installed on both sides of the track 11, and a pull-opening and closing device 14 provided at the left end of the pipe body 12. The pulling-opening and closing device 14 has a The coil spring 141 and a fixing device 142, when pulled once, the curtain cloth 16 will open downwards, and when pulled again, the curtain cloth 16 will be closed upwards through a buffer device 15 provided at the right end of the tube body 12. Slowly close it. The roller blind 1 usually has a larger diameter, and the coil spring 141 installed inside the roller blind 1 has a large diameter and a large winding force, which is enough to wind up the curtain cloth 16 of the roller blind 1 .

However, if the roller blind 1 is to be reduced in diameter and used in a smaller space such as a car curtain, a smaller coil spring will need to be used. The coil spring will have insufficient retraction force, and there is a need for improvement.

The main purpose of the present invention is to solve the problem caused by the insufficient winding force of the existing roller blind using a relatively small coil spring.

In order to achieve the above object, the present invention provides a power auxiliary device for small roller blinds, which is mainly used as a power auxiliary device for small roller blinds. The power auxiliary device includes a fixed component, including a fixed base and a cover closed above the fixed base. The upper cover, the fixed base includes a receiving part defined by the fixed base, a connecting protrusion extending from one end of the receiving part, and a connecting recessed part opposite to one end of the receiving part, the connecting recessed part is connected to The accommodating part; and a transmission component, which is arranged in the accommodating part relative to the fixed component and forms a transmission. The transmission component includes a power part, a speed change part, a transmission part and a pair of reeds, wherein the power part is arranged on The connecting recess, the power part includes a rotating shaft arranged in the connecting recess, the rotating shaft has a gear arranged at one end of the accommodating part, the speed change part is vertically pivoted at one end of the accommodating part and adjacent to the gear, the speed change part The transmission part includes a speed change gear meshing with the gear of the rotating shaft, and a speed change pinion connected above the speed change gear, the transmission part is vertically pivoted in the accommodation part and adjacent to the speed change part, the transmission part includes a A first transmission gear meshed with the speed change pinion, and a second transmission gear not meshed with the first transmission gear. Both ends of the double reed are respectively connected to the first transmission gear and the second transmission gear. The double spring The blades are connected in an S-shape, and the speed change portion shortens the length of the double reed and reduces the volume of the double reed when curled, so that it can be applied to a smaller diameter of the small rolling shutter.

Furthermore, the accommodating portion includes a convex frame edge connected to one side of the connecting protruding rod, and two wall surfaces respectively connected between the convex frame edge and the connecting recessed portion. A groove is provided above the convex frame edge, and the container is The placement portion from the edge of the convex frame to the connecting recess includes a first space, a second space that is not connected to the first space, and a third space that is connected to the second space. The first space is separated from the container. A first frame circle protrudes from the inner bottom end of the accommodation portion to connect the inner sides of the two walls and the side of the convex frame opposite to the connecting protrusion. The second space protrudes from the inner bottom end of the accommodation portion. The second frame circle is used to connect the inner side of the two wall surfaces and the first frame circle. The third space protrudes from the inner bottom end of the accommodating part to connect the inner side of the two wall surfaces and the third frame circle. Two frame circles, wherein a reinforcing convex body extends from the inner side of the two wall surfaces between the first frame circle and the second frame circle, and the second frame circle and the third frame circle are connected, and the third frame circle One space and the second space respectively extend upward from the inner bottom end of the accommodating part with a shaft. A convex joint with a screw hole is provided above the two shafts, and an outer diameter of two shafts extends below. The first contact block has a large outer diameter, the inner diameter of the first space is equal to the inner diameter of the second space, the inner diameters of the first space and the second space are larger than the inner diameter of the third space, the A second contact block extends upward from the inner bottom end of the accommodating portion in the third space, and the second contact block is provided with a through hole; wherein, the connection protrusion is hexagonal in shape, and the connection protrusion is provided with a hexagonal shape. An angular recessed hole is provided with a fixing hole passing through the recessed hole above and below the connecting protruding rod, and is fixed by a first fixing piece passing through the two fixing holes; wherein, the connecting recessed portion is provided with a first concave circle and a second concave circle from the direction of the accommodating portion and adjacent to one side of the first concave circle, the inner diameter of the second concave circle is larger than the inner diameter of the first concave circle, and is located at the connecting concave portion A screw hole is respectively provided above both sides of the first concave circle and a tip hole is respectively located on the side of the two screw holes.

Furthermore, the upper cover includes a first pressure plate, two second pressure plates respectively connected to both sides of the first pressure plate and extending outward, and a third pressure plate opposite to one end of the first pressure plate. The first pressure plate includes a protrusion. body, two convex pressing bodies and a pressing rod, wherein the convex body is arranged at one end of the first pressure plate and engages the groove of the convex frame edge, and the two convex pressing bodies are centered on the two second pressure plates respectively. Formed and extending from a bottom side of the first pressure plate, the two convex pressure bodies are respectively provided with a concave surface at the bottom, and the two concave surfaces are respectively for the two convex joints to be inserted, and are arranged above the first pressure plate and corresponding to the The two sunk and buried holes of the two convex pressing bodies are correspondingly locked by the two first fixing members respectively extending through the two sunken and buried holes and penetrating into the two screw holes of the two convex joint parts, and the resisting rod is arranged on the The first pressure plate is opposite to the bottom side of the protrusion, the pressure rod includes a cross cylinder and a protruding column extending downward from the bottom side of the cross column, the protruding column is pivotally connected to the transmission part, and With the cross cylinder abutting above the speed change pinion, the two second pressure plates are bent downward from both sides between the two convex pressure bodies of the first pressure plate in a curved arc shape to cover the On the two walls, the two second pressure plates respectively include two inwardly protruding abutment protrusions disposed on the bottom sides of the two second pressure plates, and a hollow card dug out from the interior of the two abutment protrusions. The two abutting convex ends are respectively in contact with the inner sides of the two wall surfaces. The two engaging grooves are respectively used for the two reinforcing convex bodies to be placed and fixed. The third pressure plate is covered above the connecting recess. The pressure plate includes a convex plate connected to one end of the cross cylinder, a third concave circle opposite to one end of the cross cylinder and adjacent to the convex plate, and a fourth concave circle adjacent to one end of the third concave circle. The concave circle is combined with the second concave circle of the connecting recess to form a first circular space for the gear to be placed, and the fourth concave circle is combined with the first concave circle of the connecting recess to form a second circular space. , the third pressure plate is provided with two through holes and two protruding tips corresponding to the two screw holes and the two tip holes of the connecting recess. The two protruding tips are respectively inserted into the two tip holes for positioning, and the two second fixing pieces are used respectively. Stretch the two through holes and insert the two screw holes for corresponding locking.

Furthermore, the transmission part is vertically pivoted in the third space of the accommodating part. The transmission part also includes an embedding rod connected below the transmission gear and embedded in the through hole of the second contact block. An embedding groove for the second contact block to be embedded is formed between the embedding rod and the bottom of the speed change gear.

Furthermore, the transmission part is vertically pivotally connected between the second space and the first space of the accommodation part, and a first transmission gear for the two shafts to be pivotally connected is provided above the first transmission gear and the second transmission gear. A casing pipe and a second casing pipe are provided with a first bottom rod and a second bottom rod respectively contacting the two first contact blocks. The first casing pipe is provided with a first clamping groove and the second bottom rod. The two sleeves are provided with a second clamping slot; wherein, the two ends of the double reed are respectively connected to the first clamping slot of the first sleeve and the second clamping slot of the second sleeve, and are nested in the third sleeve. A casing and the outer surface of the second casing.

Furthermore, the power part also includes a rotating body, the rotating body has an axis hole and at least one limiting groove, the axis hole is a hexagonal hole, and the limiting grooves are two opposite; wherein, the rotating shaft also includes a connecting One end of the gear is a round rod disposed in the second circular space, a convex baffle connected to the round rod and protruding in the opposite direction relative to the gear, a convex baffle connected to the round rod and protruding in the opposite direction to the round rod. A convex shaft protruding in opposite directions, and an engagement shaft connected to the convex shaft and protruding in an opposite direction relative to the convex blocking piece, wherein the convex blocking piece abuts between the connecting recess and the rotating body, the The outer shape of the convex shaft is set as a hexagon corresponding to the shape of the shaft hole of the rotating body, and the convex shaft is positioned in the shaft hole of the rotating body, so that the rotating shaft is driven when the rotating body rotates, and the engagement The shaft is provided with a convex wall positioned outside the shaft hole.

Furthermore, the outer diameter and number of teeth of the gear are the same as the outer diameter and number of teeth of the large speed gear, the outer diameter of the large speed gear is twice the outer diameter of the small speed gear, and the number of teeth of the small speed gear is the same as that of the large speed gear. The number of teeth of the large transmission gear is the same, the outer diameter and the number of teeth of the first transmission gear are the same as the outer diameter and number of teeth of the second transmission gear, and the outer diameter and number of teeth of the first transmission gear and the second transmission gear are the same as that of the transmission gear. The outer diameter of the pinion is twice the number of teeth.

Furthermore, the number of teeth of the gear, the large transmission gear and the small transmission gear is 10 teeth, and the number of teeth of the first transmission gear and the second transmission gear is 20 teeth.

Through the foregoing implementation of the present invention, it has the following characteristics compared with the existing ones:

1. The power auxiliary device of the present invention uses the transmission part to shorten the length of the double reed and reduce the curled volume of the double reed so that it can be applied to the smaller diameter of the small rolling shutter, so that The small roller blind achieves the retracting function through the power assist device and the small coil spring.

2. The power auxiliary device of the present invention can be installed according to the actual design and used in conjunction with the small roller blind in a small rolling mode, and can also be applied to the small zebra blind.

The detailed description and technical content of the present invention are now described as follows with reference to the drawings:

Please refer to Figures 4 and 5. The present invention provides a small roller blind power auxiliary device. The power auxiliary device 5 can be installed according to the actual design and utilizes a small roller blind 2 with a small retraction method. It can also be applied to a small zebra. Curtain. In this embodiment, the small roller blind 2 includes an upper rail 20 , a retracting device 3 installed at one end of the upper rail 20 , and a retracting device 3 installed in the upper rail 20 opposite to the retracting device 3 . The fixing device 4 at one end and the power auxiliary device 5 installed in the upper rail 20 and connected to one end of the fixing device 4 are respectively used for the retracting device 3 and the fixing device 4 to be axially connected and fixed on the window. There are fixed brackets 7 on both upper sides, a lower rail 23 spaced below the upper rail 20, and a curtain 8. The upper rail 20 is provided with a limiting protrusion 21. The limiting protrusion 21 is used for the assembly and fixation of the retracting device 3 and the fixing device 4, and a slot 22 is provided above the limiting protrusion 21. The inlay groove 22 allows a starting end 81 of the curtain 8 to be engaged and wound around the outer surface of the upper rail 20 , so that the curtain 8 is driven by the upper rail 20 to move up and down. The surface of the lower rail 23 is provided with a channel 231, and the channel 231 is for a terminal end 82 of the curtain 8 to be inserted and fixed.

One end of the retracting device 3 is provided with a square fixed post 31, which is axially connected to the fixed bracket 7 at the left end. The other end of the retracting device 3 is provided with a coil spring 30. The coil spring 30 When the curtain 8 is pulled downward by the rotation of the upper rail 20, it will be rolled up and tightened. The retracting device 3 is a conventional component and will not be described in detail here.

One end of the fixing device 4 is provided with a square first convex shaft 41. The first convex shaft 41 is axially connected and extends out of the fixing bracket 7 at the right end. The other end of the fixing device 4 is provided with a hexagonal first protruding shaft 41. The two convex shafts 42 and the fixing device 4 are conventional components and will not be described in detail here.

Referring back to Figures 4, 6 to 11, the power auxiliary device 5 includes a fixed component 50 and a transmission component 60 that is relative to the interior of the fixed component 50 and forms a transmission. The fixing component 50 includes a fixing base 51 and an upper cover 52 covering the fixing base 51 . The upper cover 52 is assembled with the fixing base 51 through screwing, fitting or snapping. The fixed base 51 includes an accommodating portion 53 defined by the fixed base 51 , a connecting protrusion 54 extending from one end of the accommodating portion 53 , and a connecting recess 55 opposite to one end of the accommodating portion 53 . In this embodiment, the accommodating portion 53 includes a convex frame edge 531 connected to one side of the connecting protruding rod 54, and two wall surfaces 532 respectively connecting the convex frame edge 531 and the connecting recessed portion 54. The convex frame A groove 533 is provided above the edge 531 . The accommodating portion 53 includes a first space 534 from the convex frame edge 531 to the connecting recess 55, a second space 535 that is not connected to the first space 534, and a third space that is connected to the second space 535. Space536. A first frame circle 5341 protrudes from the inner bottom of the accommodating portion 53 in the first space 534 to connect the inner sides of the two wall surfaces 532 and the side of the protruding frame edge 531 opposite to the connecting protrusion 54 . A second frame circle 5351 protrudes from the inner bottom end of the accommodating portion 53 in the second space 535 to connect the inner sides of the two wall surfaces 532 and the first frame circle 5341 . A third frame circle 5361 protrudes from the inner bottom end of the accommodating portion 53 in the third space 536 to connect the inner sides of the two wall surfaces 532 and the second frame circle 5351 . A reinforcing convex body 5321 extends from the inner side of the two wall surfaces 532 between the first frame circle 5341 and the second frame circle 5351, and the second frame circle 5351 and the third frame circle 5361 are connected. The first space 534 and the second space 535 respectively extend a shaft 537 upward from the inner bottom end of the accommodating portion 53 . A protruding portion 538 with a screw hole 5381 is provided above and below the two shafts 537 . A first contact block 539 with an outer diameter larger than the outer diameter of the shaft 537 extends. The inner diameter of the first space 534 is equal to the inner diameter of the second space 535 , and the inner diameters of the first space 534 and the second space 535 are larger than the inner diameter of the third space 536 . The third space 536 extends upward from the inner bottom end of the accommodating portion 53 to a second contact block 5362 , and the second contact block 5362 is provided with a through hole 5363 . The connecting protruding rod 54 has a hexagonal shape. The connecting protruding rod 54 is provided with a hexagonal concave hole 541 . The concave hole 541 is assembled and fixed with the second protruding shaft 42 of the fixing device 4 . The connecting protruding rod 54 A fixing hole 542 is respectively provided above and below the concave hole 541, and is fixed by a first fixing member 543 passing through the two fixing holes 542 and the second convex shaft 42. The connection recess 55 is connected to the accommodating part 53. The connection recess 55 is provided with a first concave circle 551 and a second concave circle 552 from the direction of the accommodating part 53 and adjacent to one side of the first concave circle 551. The inner diameter of the second concave circle 552 is larger than the inner diameter of the first concave circle 551 , and a screw hole 553 is respectively provided above both sides of the first concave circle 551 of the connecting concave portion 55 and is located respectively at 2. A tip hole 554 on the side of the screw hole 553.

Referring further to Figures 4, 6 to 10, the upper cover 52 includes a first pressure plate 521, two second pressure plates 522 respectively connected to both sides of the first pressure plate 521 and extending outward, and a second pressure plate 522 opposite to the first pressure plate 521. A pressure plate 521 has a third pressure plate 523 at one end. The first pressing plate 521 includes a protruding body 524, two protruding pressing bodies 525 and a resisting rod 526, wherein the protruding body 524 is disposed at one end of the first pressing plate 521 and engages the groove 533 of the protruding frame edge 531, The two convex pressing bodies 525 are respectively centered on the two second pressing plates 522 and formed on a bottom side of the first pressing plate 521. The two convex pressing bodies 525 are respectively provided with a concave surface 5251 at the bottom. The two concave surfaces 5251 are respectively The two protruding joints 538 are inserted into the two countersunk holes 5252 provided above the first pressing plate 521 and corresponding to the two protruding pressing bodies 525. The two first fixing members 5253, such as screws, respectively extend through the two countersunk holes 5252. The two screw holes 5381 of the two protruding portions 538 are sunk in the holes 5252 and are locked accordingly. The pressing rod 526 is disposed on the bottom side of the first pressing plate 521 opposite to the protruding body 524. The rod 526 includes a cross cylinder 5261 and a protruding post 5262 extending downward from the bottom side of the cross cylinder 5261. The two second pressing plates 522 are bent downward from both sides between the two convex pressing bodies 525 of the first pressing plate 521 in a curved arc shape to cover the two wall surfaces 532. The two second pressing plates 522 are respectively It includes two abutment protrusions 5221 disposed on the bottom side of the two second pressure plates 522 and protruding inward, and a hollow engaging groove 5222 dug from the inside of the two abutment protrusions 5221. The protruding ends 5221 are respectively in contact with the inner sides of the two wall surfaces 532, and the two engaging grooves 5222 are respectively used for the two reinforcing protrusions 5321 to be inserted and fixed. The third pressing plate 523 covers the connecting recess 55. The third pressing plate 523 includes a convex plate 5231 connected to one end of the cross cylinder 5261, a third plate opposite to one end of the cross cylinder 5261 and adjacent to the convex plate 5231. Three concave circles 5232, and a fourth concave circle 5233 adjacent to one end of the third concave circle 5232, the third concave circle 5232 is assembled to form a first circular space 527 relative to the second concave circle 552 of the connecting concave portion 55, The fourth concave circle 5233 is combined with the first concave circle 551 of the connecting recess 55 to form a second circular space 528 . The third pressing plate 523 is assembled with the connecting recess 55 through screwing, fitting or snapping. In this embodiment, the third pressing plate 523 is provided with the two screw holes 553 and the connecting recess 55 . The two tip holes 554 correspond to two through holes 5234 and two protruding tips 5235. The two protruding tips 5235 are respectively inserted into the two tip holes 554 for positioning. Two second fixing members 5236 such as screws respectively extend through the two through holes 5234 and penetrate the Two screw holes 553 correspond to locking.

Referring again to FIGS. 6 to 11 , the transmission component 60 includes a power part 61 , a speed change part 62 , a transmission part 63 and a pair of reeds 64 . The power part 61 includes a rotating body 611 fitted in the upper rail 20 and a rotating shaft 612 axially connected with the rotating body 611. The rotating body 611 is driven by the upper rail 20 to rotate together with the rotating shaft 612. The rotation The body 611 has an axis hole 6111 and at least one limiting groove 6112. In this embodiment, the axis hole 6111 is a hexagonal hole, and the limiting groove 6112 is two opposing limiting protrusions embedded in the upper rail 20 21, so that the upper rail 20 can drive the rotating body 611 to rotate along the limiting protrusion 21 of the upper rail 20. The rotating shaft 612 is arranged in the connecting recess 55. The rotating shaft 612 includes a gear 6121 arranged in the first circular space 527, and a round rod 6120 connected to one end of the gear 6121 and arranged in the second circular space 528. , a convex blocking piece 6122 connected to the round rod 6120 and protruding in the opposite direction relative to the gear 6121, a convex shaft 6123 connected to the convex blocking piece 6122 and protruding in the opposite direction relative to the round rod 6120, and a The engaging shaft 6124 is connected to the convex shaft 6123 and protrudes in the opposite direction to the convex blocking piece 6122. The convex blocking piece 6122 abuts between the connecting recess 55 and the rotating body 611. The outer shape of the convex shaft 6123 Corresponding to the shape of the shaft hole 6111 of the rotating body 611, it is set as a hexagon. When the convex shaft 6123 is inserted into the shaft hole 6111, a protruding wall 6125 is provided on the outer surface of the engagement shaft 6124 to resist the shaft hole 6111. The outer surface is positioned so that the rotating shaft 612 is driven when the rotating body 611 rotates.

Referring back to Figures 6 to 11, the speed change part 62 is vertically pivoted in the third space 536 of the accommodating part 53. The speed change part 62 includes a speed change gear 621 meshed with the gear 6121 of the rotating shaft 612. , a speed change pinion 622 connected to the top of the speed change gear 621, and an engaging rod 623 connected to the bottom of the speed change gear 621, forming a gap for the second speed change between the engagement rod 623 and the bottom of the speed change gear 621. The abutting block 5362 is embedded in the embedding groove 624 . In one embodiment, the outer diameter and number of teeth of the large speed gear 621 are the same as the outer diameter and number of teeth of the gear 6121. The outer diameter of the large speed gear 621 is twice the outer diameter of the small speed gear 622, and the outer diameter of the large speed gear 621 is twice that of the small speed gear 622. The number of teeth of the speed change pinion gear 622 is the same as the number of teeth of the speed change large gear 621 . When the speed change part 62 is vertically pivoted in the third space 536 of the accommodating part 53, the engaging rod 623 is embedded in the through hole 5363 of the second contact block 5362, so that the second contact block 5362 is embedded in the The cross cylinder 5261 is inserted into the groove 624, and is pivotally connected to the transmission part 62 through the protruding column 5262 on the bottom side of the cross cylinder 5261, and the cross cylinder 5261 is abutted above the transmission pinion 622, so that the transmission large gear 621 and the speed change pinion 622 change the rotation direction opposite to the rotation of the gear 6121 when the gear 6121 of the rotating shaft 612 rotates. The purpose of the above-mentioned design of the speed change portion 62 is to shorten the length of the double reed 64 and reduce the curled volume of the double reed 64 so that it can be applied to a smaller diameter of the small rolling shutter 2, so that the The small roller blind 2 achieves the rolling function through the power assist device 5 and the small coil spring 30 .

Referring back to Figures 6 to 11, the transmission part 63 is vertically pivotally connected to the second space 535 and the first space 534 of the accommodating part 53. The transmission part 63 includes a vertically pivotal connection to the second space. 535 and meshed with the speed change pinion 622, and a second transmission gear 632 vertically pivoted in the first space 534 and not meshed with the first transmission gear 631. In this embodiment, the outer diameter and number of teeth of the first transmission gear 631 are the same as the outer diameter and number of teeth of the second transmission gear 632 , and the outer diameters and number of teeth of the first transmission gear 631 and the second transmission gear 632 are the same. It is twice the outer diameter and the number of teeth of the speed change pinion gear 622. When the speed change pinion gear 622 rotates, the first transmission gear 631 changes the rotation direction opposite to that of the speed change pinion gear 622. A first sleeve 6311 and a second sleeve 6321 are provided above the first transmission gear 631 and the second transmission gear 632 for pivotal connection of the two shafts 537, and below are a first sleeve 6311 and a second sleeve 6321 for abutting the two shafts 537. The blocks 539 respectively abut the first bottom pole 6312 and a second bottom pole 6322. The first sleeve 6311 is provided with a first clamping groove 6313 and the second sleeve 6321 is provided with a second clamping slot 6323. The outer diameters of the first sleeve 6311 and the second sleeve 6321 are larger than the first transmission The outer diameters of the gear 631 and the second transmission gear 632 are small.

Referring back to Figures 6 to 11, the double reed 64 is connected in an S-shape. The two ends of the double reed 64 are respectively connected to the first slot 6313 and the second sleeve 6321 of the first sleeve 6311. The second slot 6323 is placed on the outer surface of the first sleeve 6311 and the second sleeve 6321, so that the second transmission gear 632 changes with the first transmission when the first transmission gear 631 rotates. The gear 631 rotates in the opposite direction, and the gear of the second transmission gear 632 does not move at this time, mainly to design the same structural size as the first transmission gear 631 and save costs.

Based on the above, the number of teeth of the gear 6121, the large speed gear 621 and the small speed gear 622 is 10 teeth, and the number of teeth of the first transmission gear 631 and the second transmission gear 632 is 20 teeth.

Referring again to Figures 4 and 5, the fixing brackets 7 are fixed on both sides above the window. The fixing brackets 7 respectively include a fixing body 71 installed on one of the two sides above the window and a vertical frame body 72 connected below the fixing bodies 71 . Each stand body 72 is respectively provided with a through hole 721 for the fixing column 31 of the retracting device 3 and the first convex shaft 41 of the fixing device 4 to penetrate and position.

Referring again to Figures 4, 5, 9 to 11, when the small rolling shutter 2 is assembled, the curtain 8 is disposed between the upper rail 20 and the lower rail 23, and the power auxiliary device 5 is , the fixing device 4 and the retracting device 3 are arranged in the upper rail 20, and the retracting device 3 and the fixing device 4 are driven by the upper rail 20 to idling, so that the fixing column at one end of the retracting device 3 31 is axially connected to the fixed bracket 7 at the left end, and the first convex shaft 41 at one end of the fixing device 4 is axially connected to and extends from the fixed bracket 7 at the right end to assemble the small roller blind 2 .

Referring again to Figures 4, 5, 8 to 11, when the user wants to unfold the small roller blind 2, the user vertically lowers the lower rail 23, and the upper rail 20 can drive the rotating body 611 along the The limiting protrusion 21 rotates, and the rotating body 611 drives the gear 6121 of the rotating shaft 612 to rotate together. The outer diameter of the rotating body 611 is larger than the outer diameter of the gear 6121. The rotating body 611 and the gear 6121 rotate together for one revolution. Once the speed is changed, the gear 6121 rotates and drives the large speed gear 621 in the opposite direction to the gear 6121. The large speed gear 621 rotates and also drives the small speed gear 622 to rotate. At this time, the large speed gear 621 drives the large speed gear 621 to rotate. The speed change pinion 622 changes speed again. The speed change pinion 622 rotates and drives the first transmission gear 631 in the opposite direction to the speed change pinion 622 to rotate. The speed change pinion 622 drives the outer diameter of the speed change pinion 622 to be larger than the outer diameter of the speed change pinion 622 . The first transmission gear 631 that is twice as large rotates, so that the speed of the first transmission gear 631 becomes smaller, and the first transmission gear 631 is connected to the first casing 6311 and the second casing. The contraction state of the double reed 64 on the outer surface of 6321 will not be too fast, so it will be easier for the curtain 8 to drop downwards and it will be easier to pull down to the predetermined position; conversely, when the small roller blind 2 is rolled up, the user The lower rail 23 is raised upward by the elastic force of the double reed 64 that is placed on the outer surface of the first sleeve 6311 of the first transmission gear 631 and the second sleeve 6321 of the second transmission gear 632. , to assist the coil spring 30 of the retracting device 3 to retract the curtain 8 easily when the retracting force is not enough.

However, the foregoing are only preferred embodiments of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications to the shape, structure and features described in the scope of the present invention shall be included in the patent scope of the present invention.

(existing) 1: Roller blind 11: Orbit 12:Tube body 13: Fixed bracket 14: Pull open and close device 141: Coil spring 142: Fixtures 15:Buffer device 16: Curtain cloth (this invention) 2:Small roller blind 20: On track 21: Limiting convex body 22: Groove 23: Lower track 231:Channel 3: Rewinding device 30: Coil spring 31:Fixed column 4: Fixtures 41:First convex shaft 42:Second convex shaft 5: Power auxiliary device 50: Fixed components 51: Fixed seat 52: Upper cover 521: First pressure plate 522: Second pressure plate 5221: Against the convex end 5222:Latching slot 523:Third pressure plate 5231:convex plate 5232: The third concave circle 5233: The fourth concave circle 5234:Perforation 5235:Protruding tip 5236:Second fixing piece 524:convex body 525:convex pressing body 5251: concave surface 5252: sunken hole 5253:First fixing piece 526:Compression lever 5261:Cross cylinder 5262:Protruding pillar 527:The first circular space 528:The second circular space 53: Accommodation Department 531:convex frame edge 532:Wall 5321: Reinforce the convex body 533: Groove 534:First space 5341: First frame circle 535:Second Space 5351: The second frame circle 536:Third space 5361: The third frame circle 5362: Second contact block 5363:Perforation 537:Shaft 538:Protruding joint 5381:Screw hole 539: First contact block 54:Connecting convex rod 541: concave hole 542:Fixing hole 543:First fixing piece 55:Connect the concave part 551: First concave circle 552: The second concave circle 553:Screw hole 554: Tip hole 60: Transmission components 61:Power Department 611:Rotating body 6111: Shaft hole 6112:Limit slot 612:Shaft 6120: round rod 6121:Gear 6122:Protruding stopper 6123:convex shaft 6124: engagement shaft 6125:Protruding wall 62:Transmission part 621: large speed gear 622: Speed change pinion 623: embedded rod 624: Groove 63: Transmission department 631:First transmission gear 6311:First casing 6312:First bottom pole 6313:First card slot 632:Second transmission gear 6321:Second casing 6322:Second bottom pole 6323: Second card slot 64:Double reed 7: Fixed bracket 71: Fixed body 72: Stand body 721:Through hole 8: curtain 81: Starting end 82:Terminal

Figure 1: A three-dimensional exploded view of an existing large roller shutter. Figure 2: This is an exploded perspective view of the large roller shutter shown in Figure 1 before assembly. Figure 3: A schematic diagram of the three-dimensional configuration of the large roller shutter after assembly in Figure 1. Figure 4: is an exploded three-dimensional view of the small roller blind of the present invention. Figure 5: This is a three-dimensional schematic diagram of the small roller blind in Figure 4 with its blades hanging downward. Figure 6: is an exploded three-dimensional view of the power auxiliary device of the present invention. Figure 7: A three-dimensional exploded view of the power auxiliary device in Figure 6 from another angle. Figure 8: is an exploded three-dimensional view of the power auxiliary device and upper cover in Figure 6. Figure 9: is a three-dimensional assembly view of the power auxiliary device in Figure 8. Figure 10: is a combined cross-sectional view of the power auxiliary device in Figure 9. Figure 11: A top view of the transmission assembly and fixed base configuration in Figure 8.

5: Power auxiliary device

50: Fixed components

51: Fixed seat

52: Upper cover

521: First pressure plate

522: Second pressure plate

5221: Against the convex end

523:Third pressure plate

5233: The fourth concave circle

5234:Perforation

5235:Protruding tip

5236:Second fixing piece

524:convex body

5252: sunken hole

5253:First fixing piece

53: Accommodation Department

531:convex frame edge

532:Wall

5321: Reinforce the convex body

533: Groove

534:First space

5341: First frame circle

535:Second Space

5351: The second frame circle

536:Third space

5361: The third frame circle

5362: Second contact block

5363:Perforation

537:Shaft

538:Protruding joint

5381:Screw hole

539: First contact block

54:Connecting convex rod

541: concave hole

542:Fixing hole

55:Connect the concave part

551: First concave circle

552: The second concave circle

553:Screw hole

554: Tip hole

60: Transmission components

61:Power Department

611:Rotating body

6111: Shaft hole

6112:Limit slot

612:Shaft

6120: round rod

6121:Gear

6122:Protruding stopper

6123:convex shaft

6124: engagement shaft

6125:Protruding wall

62:Transmission part

621: large speed gear

622: Speed change pinion

63: Transmission department

631:First transmission gear

6311:First casing

6313:First card slot

632:Second transmission gear

6321:Second casing

6323: Second card slot

64:Double reed

Claims (8)

A small roller blind power auxiliary device, mainly used in the small roller blind power auxiliary device, the power auxiliary device includes A fixed component includes a fixed base and an upper cover that covers the fixed base. The fixed base includes an accommodating portion defined by the fixed base, a connecting protrusion extending from one end of the accommodating portion, and A connecting recess opposite to one end of the accommodating part, the connecting recess is connected to the accommodating part; and A transmission component is arranged in the receiving part relative to the fixed component and forms a transmission. The transmission component includes a power part, a speed change part, a transmission part and a pair of reeds, wherein the power part is arranged in the connection recess, and the power part The rotating shaft includes a rotating shaft arranged in the connecting recess. The rotating shaft has a gear arranged at one end of the accommodating part. The speed change part is vertically pivoted at one end of the accommodating part and adjacent to the gear. The speed changing part includes a gear connected to the rotating shaft. The transmission gear is meshed with the transmission gear, and a transmission pinion is connected to the top of the transmission gear. The transmission part is vertically pivoted in the accommodation part and adjacent to the transmission part. The transmission part includes a transmission part that is meshed with the transmission pinion. The first transmission gear, and a second transmission gear that is not meshed with the first transmission gear, the two ends of the double reed are connected to the first transmission gear and the second transmission gear respectively, and the double reed is connected in the shape of S The speed change part shortens the length of the double reed and reduces the curled volume of the double reed so that it can be applied to a smaller diameter of the small rolling shutter. The small rolling shutter power assist device according to claim 1, wherein the accommodating portion includes a convex frame edge connected to one side of the connecting protruding rod, and two wall surfaces respectively connected between the convex frame edge and the connecting recessed portion. , a groove is provided above the convex frame edge, and the accommodating portion includes a first space from the convex frame edge to the connecting recess, a second space that is not connected to the first space, and a second space that is not connected to the second space. A third communicating space, the first space protrudes from the bottom end of the accommodating portion with a first frame circle to connect the inner side of the two walls and the side of the convex frame opposite to the connecting protrusion, and the second A second frame circle protrudes from the inner bottom end of the accommodating part in the space to connect the inner sides of the two walls and the first frame circle. The third space protrudes from the inner bottom end of the accommodating part. A frame circle is used to connect the inner sides of the two wall surfaces and the second frame circle, wherein a reinforcing convex body is respectively extended between the first frame circle and the second frame circle from the inner side of the two wall surfaces, and the second frame circle In communication with the third frame circle, the first space and the second space each have a shaft extending upward from the inner bottom end of the accommodating portion, and a protrusion with a screw hole is provided above the two shafts. A first contact block with an outer diameter larger than the outer diameter of the shaft extends below the connecting portion. The inner diameter of the first space is equal to the inner diameter of the second space. The inner diameter of the first space and the second space The inner diameter is larger than the inner diameter of the third space, and a second contact block extends upward from the inner bottom end of the accommodating part. The second contact block is provided with a through hole; wherein, the connecting protrusion The outer shape is hexagonal, and the connecting protruding rod is provided with a hexagonal concave hole. A fixing hole passing through the concave hole is provided above and below the connecting protruding rod, and a first fixing piece is inserted into the two fixing holes. Fixed; wherein, the connection recess is provided with a first concave circle and a second concave circle adjacent to one side of the first concave circle from the direction of the accommodating portion, and the inner diameter of the second concave circle is larger than the first concave circle. The inner diameter of the circle is large, and a screw hole is provided above both sides of the first concave circle of the connecting concave portion and a pin hole is respectively located on the side of the two screw holes. The small rolling shutter power assist device according to claim 2, wherein the upper cover includes a first pressure plate, two second pressure plates connected to both sides of the first pressure plate and extending outward, and a pressure plate opposite to the first pressure plate. The third pressing plate at one end, the first pressing plate includes a convex body, two convex pressing bodies and a resisting rod, wherein the convex body is disposed at one end of the first pressing plate and engages the groove of the convex frame edge, the two The convex pressing bodies are respectively centered on the two second pressing plates and formed on a bottom side of the first pressing plate. The two convex pressing bodies are respectively provided with a concave surface at the bottom, and the two concave surfaces are respectively used for the two convex connecting parts to be placed. , and the two countersunk holes provided above the first pressure plate and corresponding to the two convex pressing bodies are used to extend the two countersunk holes and penetrate the two screws of the two convex joints respectively by the two first fixing members. The holes are correspondingly locked, and the pressure rod is arranged on the bottom side of the first pressure plate opposite to the protrusion. The pressure rod includes a cross cylinder and a protrusion extending downward from the bottom side of the cross cylinder. The convex column is pivotally connected to the speed change part, and the cross cylinder is in contact with the speed change pinion. The two second pressure plates are respectively separated from both sides of the first pressure plate between the two convex pressure bodies. The two second pressure plates are bent downward in an arc shape to cover the two walls. The two second pressure plates respectively include two abutment convex ends disposed on the bottom sides of the two second pressure plates and each protrude inward, and respectively extend from the two second pressure plates. A hollow engaging groove is dug inside the abutting convex end. The two abutting convex ends are respectively in contact with the inner sides of the two wall surfaces. The two engaging grooves are respectively used for the two reinforcing convex bodies to be placed and fixed. The third pressure plate is covered above the connecting recess. The third pressure plate includes a convex plate connected to one end of the cross cylinder, a third concave circle opposite to one end of the cross cylinder and adjacent to the convex plate, and a third concave circle adjacent to the first end of the cross cylinder. The fourth concave circle at one end of the three concave circles is connected with the second concave circle of the connecting concave part to form a first circular space for the gear to be placed. The fourth concave circle is connected with the second concave circle of the connecting concave part. The first concave circle is assembled to form a second circular space, and the third pressure plate is provided with two through holes and two protruding tips corresponding to the two screw holes and the two tip holes of the connecting recess, and the two protruding tips are respectively embedded in the The two tip holes are positioned by two second fixing members respectively extending through the two through holes and penetrating into the two screw holes for corresponding locking. The small rolling shutter power assist device according to claim 2, wherein the speed change part is vertically pivoted in the third space of the accommodating part, and the speed change part also includes a speed change gear connected below and embedded in the second speed change gear. An embedding rod in the hole of the abutment block forms an embedding groove for the second abutment block to be embedded in between the embedding rod and the bottom of the transmission gear. The small rolling shutter power auxiliary device according to claim 2, wherein the transmission part is vertically pivoted between the second space and the first space of the accommodation part, and the first transmission gear and the second transmission gear are A first sleeve and a second sleeve for pivotal connection of the two shafts are provided above, and a first bottom rod and a second bottom rod respectively abutting the two first contact blocks are provided below. The first sleeve is provided with a first clamping slot and the second sleeve is provided with a second clamping slot; wherein, both ends of the double reed are respectively connected to the first clamping slot and the second sleeve of the first sleeve. The second slot is disposed on the outer surfaces of the first sleeve and the second sleeve. The small rolling shutter power auxiliary device as claimed in claim 3, wherein the power part further includes a rotating body, The rotating body has an axis hole and at least one limiting groove. The axis hole is a hexagonal hole, and the limiting grooves are two opposite ones; wherein, the rotating shaft also includes a shaft connected to one end of the gear and disposed in the second circular space. There is a round rod inside, a convex block connected to the round bar and protruding in the opposite direction relative to the gear, a convex shaft connected to the convex block and protruding in the opposite direction relative to the round bar, and a convex shaft connected to the round bar. The protruding shaft is an engagement shaft protruding in the opposite direction relative to the protruding blocking piece, wherein the protruding blocking piece abuts between the connecting recess and the rotating body, and the shape of the protruding shaft corresponds to the shaft hole of the rotating body. The shape is set as a hexagon, and the convex shaft is positioned in the shaft hole of the rotating body, so that the rotating shaft is driven when the rotating body rotates, and the engaging shaft is provided with a convex shaft positioned outside the shaft hole. wall. The small rolling shutter power auxiliary device as claimed in claim 1, wherein the outer diameter and number of teeth of the gear are the same as the outer diameter and number of teeth of the large speed gear, and the outer diameter of the large speed gear is the outer diameter of the small speed gear. 2 times, and the number of teeth of the small speed gear is the same as the number of teeth of the large speed gear, the outer diameter and the number of teeth of the first transmission gear are the same as the outer diameter and number of teeth of the second transmission gear, and the first transmission gear and The outer diameter and number of teeth of the second transmission gear are twice the outer diameter and number of teeth of the speed change pinion. The small rolling shutter power auxiliary device as claimed in claim 7, wherein the number of teeth of the gear, the large transmission gear and the small transmission gear is 10 teeth, and the number of teeth of the first transmission gear and the second transmission gear is 20 teeth. .

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