Roller blind

Abstract

A roller blind includes an upper rail, a roller blind assembly at one end of the upper rail, a limiting device at the other end of the upper rail, two fixing brackets for respectively connecting the roller blind assembly and the limiting device and for fixing to the upper sides of a window, a lower rail spaced below the upper rail, and a curtain slat, the two ends of which are respectively fixed to the upper rail and the lower rail and wound around the surface of the upper rail; wherein one end of the limiting device protrudes from the outer end of the upper rail, serving to engage and fix with the fixing bracket at the right end, and also serving to allow adjustment of the lower limit and upper limit of the lower rail at the outer end of the fixing bracket at the right end, so that consumers can rotate it by hand or adjust it with adjustment tools without disassembling the overall structure of the roller blind.

Description

Technical Field

[0001] This invention relates to a curtain, and more particularly to a roller blind. Background Technology

[0002] Please see Figure 1 and Figure 2 Roller blinds 1, used for sunshade and decoration in homes, offices, and other locations, have become quite common. However, existing roller blinds 1 allow users to pull the lower rail 12 to open or close the curtain slats 11. Because roller blinds 1 lack suitable upper and lower limit devices, when the lower rail 12 is at position A1 after the curtain slats 11 are closed, it can be too high, causing the lower rail 12 to flip to the other side of the upper rail 13 due to the force generated by the closing of the upper rail 13. This causes the highest point A2 of the closed lower rail 12 to drop, requiring the user to manually return the lower rail 12 to its original position. Furthermore, because roller blinds 1 lack a lower limit device, excessive force when pulling down the curtain slats 11 can cause the top 111 of the curtain slats 11 to detach from the connection point B of the upper rail 13, resulting in the curtain 11 falling down.

[0003] Therefore, the industry has developed roller blinds with adjustable upper limit devices or roller blinds with only lower limit devices. Roller blinds with upper limit devices do not have lower limit devices, which can cause the slats to fall off the upper rail when pulled down. Conversely, roller blinds with lower limit devices do not have upper limit devices. When the slats are closed, the bottom of the slats flips to the other side of the upper rail due to the force generated when closing, and the user has to manually put the lower rail back in its original position.

[0004] Also, please see Figure 3 Furthermore, an industry has developed a roller blind with upper and lower limit positions, as disclosed in Taiwan Patent Publication No. M605068, and its buffer. In this roller blind 2, the buffer 21 is pre-adjusted by the manufacturer and sealed within an upper rail 22. If a consumer purchases and installs the roller blind 2, only to find that its size is unsuitable, the consumer cannot adjust it themselves and must return it to the seller for repair or purchase a replacement roller blind 2 of the correct size. These existing defects are precisely the shortcomings that those skilled in the art urgently seek to improve. Summary of the Invention

[0005] The main objective of this invention is to solve the problems arising from the existing roller blind.

[0006] To achieve the above objectives, the present invention provides a roller blind, comprising: an upper rail; a roller blind assembly located at one end of the upper rail; a limiting device located at the other end of the upper rail; two fixed brackets, which are respectively used for axial connection between the roller blind assembly and the limiting device and for fixing to the upper sides of a window; a lower rail, which is spaced below the upper rail; and a curtain slat, the two ends of which are respectively fixed to the upper rail and the lower rail and wound around the surface of the upper rail; wherein one end of the limiting device protrudes from the outer end of the upper rail, serving to engage and fix with the fixed bracket at the right end, and also serving to allow adjustment of the lower limit and upper limit of the lower rail at the outer end of the fixed bracket at the right end.

[0007] Furthermore, the upper rail is provided with a limiting protrusion, and a groove is provided above the limiting protrusion for the starting end of the curtain slat to engage, so that the curtain slat is moved up and down by the upper rail; the surface of the lower rail is provided with a channel for the end of the curtain slat to be inserted and fixed; one end of the roller blind device is provided with a square fixing post; the limiting device includes a lower limiting shaft, a shaft housing, an upper limiting shaft, a stroke adjustment component, a limiting rotating body, an upper limiting stop, a lower limiting stop, and a limiting elastic component, wherein the lower limiting shaft has a first protruding shaft of the fixing bracket at one end of the lower limiting shaft and extending to the right end, the first protruding shaft is a square shaft and is provided with A through hole communicating with the internal hollow of the lower limiting shaft; the lower limiting shaft has a top cover connected to the first convex shaft, and multiple hooks protruding from the other end of the lower limiting shaft, each hook having a hook body; a shaft housing is fitted onto the outer surface of the lower limiting shaft and engaged within the upper rail, and the shaft housing rotates on the outer surface of the lower limiting shaft driven by the upper rail; one end of the shaft housing has a concave flange, and the other end extends into an inner shaft with a chamber, wherein the chamber is for the lower limiting shaft to be inserted, with the top cover correspondingly positioned within the concave flange, and the first convex shaft rotating and driving the lower limiting shaft to rotate within the chamber; the outer end of the inner shaft is for the hooks to be hooked and restrict the lower limiting shaft. The shaft is disengaged, and the shaft housing has at least one pair of first limiting grooves for the limiting protrusions that should be on the upper rail; the upper limiting shaft is disposed within the internal hollow of the lower limiting shaft, the upper limiting shaft has a second protrusion and a shaft rod, the second protrusion is located at one end of the upper limiting shaft, and the second protrusion is a circular protrusion to be inserted into the through hole of the first protrusion, the second protrusion has a hexagonal hole, the shaft rod protrudes from the inside of the upper limiting shaft outward to the other end of the upper limiting shaft, the other end of the upper limiting shaft is provided with an annular groove, and an internal chamber is formed between the interior of the other end of the upper limiting shaft and the shaft rod, and the outer surface of the shaft rod has a first protrusion and a second protrusion, the first protrusion... One end of the second protrusion is connected to the annular groove of the upper limit shaft and does not exceed the outer diameter of the annular groove; one end of the stroke adjustment member is inserted into the inner cavity of the upper limit shaft and allows the shaft to rotate. The stroke adjustment member includes an arc-shaped lever, an annular protrusion connected to the arc-shaped lever, a first threaded portion connected to the annular protrusion and protruding in the opposite direction to the arc-shaped lever, and a first fixing portion connected to the first threaded portion. The arc-shaped lever has a semi-circular groove in which the outer surface of the shaft without the first and second protrusions is inserted and rotated. A first side and a second side are formed on both sides of the arc-shaped lever. The outer surface of the first fixing portion has a locking body.The limiting rotating body is movably screwed onto the stroke adjustment member and engages with the upper rail. Driven by the upper rail, the limiting rotating body rotates along the stroke adjustment member. The limiting rotating body has a second threaded portion and at least one second limiting groove corresponding to the limiting protrusion of the upper rail. The second threaded portion is screwed onto the first threaded portion. The limiting rotating body has a first abutment portion and a second abutment portion on both sides adjacent to the second limiting groove and staggered opposite each other. The upper limit stop body is connected to the other end of the stroke adjustment member and rotates synchronously with the stroke adjustment member. The upper limit stop body has a second fixing portion and a third abutment portion. The second fixing portion engages with the first fixing portion of the stroke adjustment member, and the third abutment portion engages accordingly. The first abutment of the limiting rotating body; the lower limiting stop is sleeved on the outer surface of the stroke adjusting member to provide rotational movement of the stroke adjusting member. The lower limiting stop has a cylindrical body, a protruding portion and a fourth abutment portion. The cylindrical body is sleeved on the outer surface of the stroke adjusting member and has a receiving portion. The receiving portion includes a first space, a second space connected to the first space, a third space connected to the second space, and a third threaded portion on the inner surface of the third space from one end of the cylindrical body to the other end. The first space is fitted with the annular groove of the upper limiting shaft. The inner diameter of the first space is larger than the inner diameter of the second space, and the first space and the second space are for the arc-shaped lever of the stroke adjusting member to be inserted. A first abutment edge is formed between the first space and the second space, and the inner diameter of the second space is larger than the inner diameter of the third space. A second abutment edge is formed between the second space and the third space. The second abutment edge is used for the annular protrusion of the stroke adjustment member to abut. The third threaded portion is used for the first threaded portion of the stroke adjustment member to be movably screwed. The outer surface of one end of the cylinder has multiple grooves. The protruding portion protrudes from the cylinder and adjacent to the grooves. The protruding portion has multiple slots corresponding to the grooves. The slots are used for the hooks of the hook fasteners to be inserted into the grooves and engaged, so that the lower limit stop and the lower limit shaft are engaged and fixed. The fourth abutment portion faces the outer surface of the cylinder. The fourth abutment is provided, with one end connected to the protruding part and the other end extending out of the other end of the cylinder, so that the fourth abutment engages with the second abutment of the limiting rotating body; the limiting elastic member is located in the first space of the lower limiting stop, with one end abutting against the first abutting edge and the other end abutting against the other end of the upper limiting shaft, forming a first through space and a second through space through the one end and the other end of the limiting elastic member. The first through space allows the arc-shaped lever to pass through and rotate in a counterclockwise or clockwise direction, and the second through space allows the first and second protrusions of the shaft to pass through and rotate in a counterclockwise or clockwise direction.

[0008] Furthermore, each of the fixing brackets includes a fixing body and a vertical frame connecting the lower part of the fixing body. Each fixing body has a vertical member, and each vertical member has multiple fixing holes in both the horizontal and vertical portions. Each vertical member is bent inward below the fixing holes in the vertical portion. Each vertical frame has a connecting portion connecting the bottom end of the vertical portion of each vertical member, and a guide portion extending from the lower part of the connecting portion. Two grooves are respectively provided on both sides of each guide portion for temporary placement during the installation of the roller blind device. A square through hole is provided between the grooves of each guide portion for the fixing post and the first convex shaft of the lower limiting shaft of the roller blind device to pass through and be positioned. A guide groove bent outward is provided below each through hole of each guide portion, wherein one guide groove is used to guide the fixing post into one of the through holes for positioning, and the other guide groove is used to guide the first convex shaft into the other through hole for positioning.

[0009] Furthermore, each of these fixed brackets also includes an outer sleeve, each of which is provided with a receiving groove and two locking blocks located on the upper sides of the receiving groove. The receiving groove is for the frame body to be inserted into, and the locking blocks are used to fix the connecting parts.

[0010] Furthermore, there are three hook fasteners; wherein, the grooves of the cylinder and the slots of the protrusion are configured to correspond to the three hook fasteners.

[0011] Furthermore, the first, second, and third blocking parts are protrusions, and the fourth blocking part is a protruding strip.

[0012] Through the aforementioned implementation of the present invention, compared with the prior art, it has the following characteristics: The roller blind of the present invention, through the limiting device, allows the user to manually rotate one end of the limiting device to limit and control the lower rail from continuing to droop and to be lowered without disassembling the entire roller blind assembly, or to adjust the limiting device with an adjustment tool to limit and control the lower rail from continuing to rise and to be uppered. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an existing roller blind after the slats are closed.

[0014] Figure 2 This is a schematic diagram of an existing roller blind after the slats have been unfolded.

[0015] Figure 3 A schematic diagram of the configuration of a roller shutter with upper and lower limits and its buffer, as specified in Taiwan Patent Publication No. M605068.

[0016] Figure 4 This is an exploded perspective view of the roller blind of the present invention;

[0017] Figure 5 This is an exploded perspective view of the limiting device for the roller blind of the present invention;

[0018] Figure 6 for Figure 5 An exploded three-dimensional view of the roller shutter's limiting device from another angle;

[0019] Figure 7 for Figure 5 A combined sectional view of the curtain slat limiting device;

[0020] Figure 8 for Figure 7 Side view of the engagement of the second and fourth blocking parts;

[0021] Figure 9 for Figure 5 Side view of the assembly of stroke adjustment component, limit elastic component and lower limit stop;

[0022] Figure 10 This is a three-dimensional schematic diagram of the roller blind pull-down slats of the present invention;

[0023] Figure 11 for Figure 10 A combined sectional view of the roller shutter's limiting device;

[0024] Figure 12 for Figure 10 A 3D view of the curtain slats after they have been unfolded;

[0025] Figure 13 for Figure 11 Side view of the engagement of the first and third blocking parts;

[0026] Figure 14 This is a three-dimensional schematic diagram of the roller shutter changing the lower limit position of the lower rail according to the present invention;

[0027] Figure 15 for Figure 14 A schematic diagram of the operation of the limit device that changes the lower limit of the lower rail;

[0028] Figure 16 for Figure 15 A schematic diagram showing the counterclockwise rotation of the stroke adjustment component, the limit elastic component, and the lower limit stop.

[0029] Figure 17 This is a three-dimensional schematic diagram of the roller shutter of the present invention, showing the change of the upper limit position of the lower track;

[0030] Figure 18 for Figure 17 A schematic diagram illustrating the operation of the limit device that changes the upper limit of the lower rail;

[0031] Figure 19 for Figure 18 A schematic diagram showing the clockwise rotation of the stroke adjustment component, the limit elastic component, and the upper limit stop.

[0032] [Symbol Explanation]

[0033] existing

[0034] 1: Roller blind

[0035] 11: Curtain slats

[0036] 111: Top

[0037] 12: Lower rail

[0038] 13: Upper rail

[0039] A1: Location

[0040] A2: Highest point

[0041] B: Connection point

[0042] 2: Roller blind

[0043] 21: Buffer

[0044] 22: Upper rail

[0045] This invention

[0046] 3: Roller blind

[0047] 4: Upper rail

[0048] 411: Limiting convex body

[0049] 412: Socket

[0050] 42: Lower rail

[0051] 421: Channel

[0052] 5: Roller shutter device

[0053] 51: Fixed column

[0054] 6: Limiting device

[0055] 61: Lower limit axis

[0056] 610: One end

[0057] 6100: Hollow inside

[0058] 611: Top Cover

[0059] 612: First convex shaft

[0060] 6121: Through hole

[0061] 613: The other end

[0062] 614: Hook and fastener

[0063] 6141: Hook body

[0064] 62: Shaft housing

[0065] 620: concave edge

[0066] 621: First limiting groove

[0067] 622: Inner Shaft

[0068] 6220: Container

[0069] 6221: One end

[0070] 63: Upper limit axis

[0071] 630: One end

[0072] 6301: The other end

[0073] 631: Second convex shaft

[0074] 6311: Hexagonal hole

[0075] 632: Shaft

[0076] 6321: First Convex Bar

[0077] 6322: Second convex block

[0078] 633: Internal Chamber

[0079] 634: Annular groove

[0080] 64: Travel Adjustment Components

[0081] 641: Arc-shaped lever

[0082] 6411: Semicircular groove

[0083] 6412: First side

[0084] 6413: Second side

[0085] 642: Ring convexity

[0086] 643: First threaded section

[0087] 644: First fixed part

[0088] 6441: Card Body

[0089] 65: Limit Rotation

[0090] 651: Second threaded section

[0091] 652: Second limiting groove

[0092] 653: First Defensive Unit

[0093] 654: Second Defensive Section

[0094] 66: Upper limit stop

[0095] 661: Second fixing part

[0096] 662: Third Defensive Unit

[0097] 67: Lower limit stop

[0098] 671: Cylinder

[0099] 6711: One end

[0100] 6712: The other end

[0101] 6713: Trench

[0102] 672: Togoraga section

[0103] 6721: Slot

[0104] 673: Fourth Defensive Unit

[0105] 674: Reception Section

[0106] 675: First Space

[0107] 6751: First adjacent edge

[0108] 676: The Second Space

[0109] 6761: Second adjacent edge

[0110] 677: The Third Space

[0111] 678: Third threaded section

[0112] 68: Limiting elastic element

[0113] 681: One end

[0114] 682: The other end

[0115] 683: First Transition Space

[0116] 684: Second Transition Space

[0117] 7: Fixed bracket

[0118] 71: Fixed body

[0119] 711: Vertical component

[0120] 712, 713: Fixing holes

[0121] 72: Stand body

[0122] 721: Connecting part

[0123] 722: Guidance Department

[0124] 723: Trench

[0125] 724: Through hole

[0126] 725: Guide slot

[0127] 73: Outer packaging

[0128] 731: Receptacle

[0129] 732: Locking Block

[0130] 8: Curtain slats

[0131] 81: Starting end

[0132] 82: Terminal

[0133] 9: Adjustment Tools

[0134] C: Stop point of the lower limit

[0135] D: Stop point of the upper limit digit Detailed Implementation

[0136] The invention is described in detail below with reference to the accompanying drawings:

[0137] Please see Figures 4 to 7 As shown, the present invention provides a roller blind 3, which includes an upper rail 4, a roller blind device 5 at one end of the upper rail 4, a limiting device 6 at the other end of the upper rail 4, two fixing brackets 7 for the roller blind device 5 and the limiting device 6 respectively to be axially connected, a lower rail 42 spaced below the upper rail 4, and a curtain slat 8. The upper rail 4 is provided with a limiting protrusion 411, and a groove 412 is provided above the limiting protrusion 411. The groove 412 is for the starting end 81 of the curtain slat 8 to be engaged with and rolled around the surface of the upper rail 4, so that the curtain slat 8 is raised and lowered by the upper rail 4. The surface of the lower rail 42 is provided with a channel 421, which is for the end 82 of the curtain slat 8 to be inserted and fixed.

[0138] The roller blind device 5 is located at one end of the upper rail 4. A square-shaped fixing post 51 is provided at one end of the roller blind device 5. The fixing post 51 is axially connected to the fixing bracket 7 at the left end. The roller blind device 5 is a known component and will not be described in detail here.

[0139] See also Figures 4 to 7As shown, the limiting device 6 is disposed at the other end of the upper rail 4. The limiting device 6 includes a lower limiting shaft 61, a shaft housing 62, an upper limiting shaft 63, a stroke adjustment member 64, a limiting rotating body 65, an upper limiting stop 66, a lower limiting stop 67, and a limiting elastic member 68. The lower limiting shaft 61 includes a first convex shaft 612 of the fixing bracket 7 extending from one end 610 of the lower limiting shaft 61 to the right. The first convex shaft 612 is a square shaft to prevent it from moving. In one embodiment, the first convex shaft 612 has a through hole 6121 communicating with the internal hollow 6100 of the lower limiting shaft 61. The lower limit shaft 61 has a top cover 611 connected to the first convex shaft 612, and a plurality of hook fasteners 614 distributed and protruding from the other end 613 of the lower limit shaft 61. Preferably, there are three hook fasteners 614, each of which is provided with a hook body 6141.

[0140] The housing 62 is fitted onto the outer surface of the lower limit shaft 61 and is connected to the upper rail 4. The housing 62 is driven by the upper rail 4 to rotate on the outer surface of the lower limit shaft 61. One end of the housing 62 has a recessed flange 620, and the other end extends into an inner shaft 622 with a chamber 6220. The chamber 6220 is for the lower limiting shaft 61 to be inserted, and the top cover 611 is correspondingly disposed in the recessed flange 620. When the first convex shaft 612 rotates, it drives the lower limiting shaft 61 to rotate within the chamber 6220. The outer end 6221 of the inner shaft 622 is hooked and secured by the hooks 614 to prevent the lower limiting shaft 61 from coming out. The housing 62 has at least one first limiting groove 621 corresponding to the limiting protrusion 411 of the upper rail 4, so that the upper rail 4 can drive the housing 62 to rotate on the outer surface of the lower limiting shaft 61 in conjunction with the limiting protrusion 411 of the upper rail 4.

[0141] The upper limit shaft 63 is disposed within the hollow space 6100 of the lower limit shaft 61. The upper limit shaft 63 has a second convex shaft 631 and a shaft 632. The second convex shaft 631 is located at one end 630 of the upper limit shaft 63, and the second convex shaft 631 is a circular convex shaft to be inserted into the through hole 6121 of the first convex shaft 612. The second convex shaft 631 has a hexagonal hole 6311, which is used to insert an adjustment tool 9, such as a hexagonal wrench, to rotate the upper limit shaft 63 within the hollow space 6100 of the lower limit shaft 61 (e.g., ...). Figure 18(As shown). The shaft 632 protrudes outward from the inside of the upper limit shaft 63 towards the other end 6301 of the upper limit shaft 63. The other end 6301 of the upper limit shaft 63 is provided with an annular groove 634, and an internal chamber 633 is formed between the inside of the other end 6301 of the upper limit shaft 63 and the shaft 632. The outer surface of the shaft 632 has a first protrusion 6321 and a second protrusion 6322. One end of the first protrusion 6321 and the second protrusion 6322 are connected to the annular groove 634 of the upper limit shaft 63 and do not exceed the outer diameter of the annular groove 634.

[0142] One end of the travel adjustment member 64 is inserted into the internal chamber 633 of the upper limit shaft 63 and allows the shaft 632 to rotate. The travel adjustment member 64 includes an arc-shaped lever 641, an annular protrusion 642, a first threaded portion 643, and a first fixing portion 644. The arc-shaped lever 641 is semi-circular and has a semi-circular groove 6411. The outer surface of the shaft 632 without the first and second protrusions 6321 and 6322 is inserted into and rotated within the semi-circular groove 6411. A first side 6412 and a second side 6413 are formed on both sides of the arc-shaped lever 641. The annular protrusion 642 is connected to the arc-shaped lever 641. The first threaded portion 643 is connected to the annular protrusion 642 and protrudes in the opposite direction to the arc-shaped lever 641. The first fixing part 644 is connected to the first threaded part 643, and the outer surface of the first fixing part 644 has a retainer 6441.

[0143] The limiting rotating body 65 is movably screwed to the stroke adjustment member 64 and engages with the upper rail 4. The limiting rotating body 65 is driven by the upper rail 4 to rotate and move along the stroke adjustment member 64. The limiting rotating body 65 has a second threaded portion 651 and at least one second limiting groove 652. The second threaded portion 651 is screwed onto the first threaded portion 643. The second limiting groove 652 corresponds to the limiting protrusion 411 of the upper rail 4, allowing the upper rail 4 to drive the limiting rotating body 65 to rotate and move along the first threaded portion 643 in coordination with the limiting protrusion 411. The limiting rotating body 65 has a first abutting portion 653 and a second abutting portion 654 on both sides, adjacent to the second limiting groove 652 and staggered opposite each other.

[0144] See also Figure 7 and Figure 13 The upper limit stop 66 is connected to the other end of the stroke adjustment member 64 and rotates synchronously with the stroke adjustment member 64. The upper limit stop 66 has a second fixing part 661 and a third abutting part 662. The second fixing part 661 engages with the first fixing part 644 of the stroke adjustment member 64. The third abutting part 662 correspondingly engages with the first abutting part 653 of the limiting rotating body 65.

[0145] See also Figure 7 and Figure 8 The lower limit stop 67 is fitted onto the outer surface of the stroke adjuster 64 to provide rotational movement for the stroke adjuster 64. The lower limit stop 67 has a cylindrical body 671, a protruding portion 672, and a fourth abutment portion 673. The cylindrical body 671 is fitted onto the outer surface of the stroke adjuster 64 and has a receiving portion 674. The receiving portion 674, from one end 6711 to the other end 6712, includes a first space 675, a second space 676 connected to the first space 675, a third space 677 connected to the second space 676, and a third threaded portion 678 on the inner surface of the third space 677. The first space 675 is fitted into the annular groove 634 of the upper limit shaft 63. The inner diameter of the first space 675 is larger than the inner diameter of the second space 676. The first space 675 and the second space 676 are for the arc-shaped lever 641 of the stroke adjustment member 64 to be inserted. A first abutment edge 6751 is formed between the first space 675 and the second space 676. The inner diameter of the second space 676 is larger than the inner diameter of the third space 677. A second abutment edge 6761 is formed between the second space 676 and the third space 677. The second abutment edge 6761 is used for the annular protrusion 642 of the stroke adjustment member 64 to abut. The third threaded portion 678 is used for the first threaded portion 643 of the stroke adjustment member 64 to be movably screwed. The outer surface of one end 6711 of the cylindrical body 671 has multiple grooves 6713. The protruding part 672 is located on the cylindrical body 671 and protrudes adjacent to the grooves 6713. The protruding part 672 has multiple slots 6721 corresponding to the grooves 6713. The slots 6721 allow the hooks 614 to be inserted into and engaged from the grooves 6713, so that the lower limit stop 67 is engaged and fixed with the lower limit shaft 61. The grooves 6713 of the cylindrical body 671 and the slots 6721 of the protruding part 672 are configured in three corresponding positions to cooperate with the hooks 614. The fourth abutment 673 protrudes towards the outer surface of the cylinder 671, with one end connected to the protruding part 672 and the other end extending out of the other end 6712 of the cylinder 671, so that the fourth abutment 673 correspondingly engages with the second abutment 654 of the limiting rotating body 65. In one embodiment, the first abutment 653, the second abutment 654, and the third abutment 662 are protrusions, and the fourth abutment 673 is a protruding strip.

[0146] See also Figure 7 and Figure 9 and cooperate Figure 16 and Figure 19The limiting elastic member 68 is located within the first space 675 of the lower limiting stop 67. One end 681 of the limiting elastic member 68 abuts against the first abutting edge 6751, and the other end 682 of the limiting elastic member 68 abuts against the other end 6301 of the upper limiting shaft 63. A first through space 683 and a second through space 684 are formed through the one end 681 and the other end 682 of the limiting elastic member 68. The first through space 683 is for the arc-shaped lever 641 to pass through and can rotate counterclockwise or clockwise. The second through space 684 is for the first protrusion 6321 and the second protrusion 6322 of the shaft 632 to pass through and can rotate counterclockwise or clockwise.

[0147] See also Figure 4 These fixing brackets 7 correspond to and are used for fixing to the upper sides of the window. Each fixing bracket 7 includes a fixing body 71 installed on the upper side of the window and a vertical frame 72 connected to the lower part of the fixing body 71. Each fixing body 71 has a vertical member 711, and each vertical member 711 has a plurality of fixing holes 712 and 713 in both the horizontal and vertical portions. Each vertical member 711 is bent inward below the fixing holes 713 in the vertical portion. Each vertical frame 72 is provided with a connecting portion 721 connecting to the bottom end of the vertical portion of each vertical member 711, and a guide portion 722 extending from the lower part of the connecting portion 721. Two grooves 723 are respectively provided on both sides of each guide portion 722 for temporary placement during the installation of the roller blind device 5. Each guide portion 722 has a square through hole 724 between the grooves 723 for the fixing post 51 of the roller blind device 5 and the first convex shaft 612 of the lower limiting shaft 61 to pass through and be positioned. Each guide portion 722 has an outwardly curved guide groove 725 below each through hole 724, one guide groove 725 for the fixing post 51 to be guided into one of the through holes 724 for positioning, and the other guide groove 725 for the first convex shaft 612 to be guided into the other through hole 724 for positioning.

[0148] Continuing on the above, each of the fixed brackets 7 further includes an outer sleeve 73. Each of the outer sleeves 73 is provided with a receiving groove 731 and two locking blocks 732 located on both sides above the receiving groove 731. The receiving grooves 731 are for the upright bodies 72 to be inserted into, and the locking blocks 732 are used to fix the connecting parts 721.

[0149] Please see Figures 10 to 13When the installer installs the roller shutter 3, the upper rail 4 rotates and the lower rail 42 descends. The upper rail 4 can drive the first limiting groove 621 of the shaft housing 62 and the second limiting groove 652 of the limiting rotating body 65 to rotate along the limiting protrusion 411. The limiting rotating body 65 rotates from the stroke adjustment member 64 toward the lower limiting stop 67. When the limiting rotating body 65 pushes against the lower limiting stop 67, the second abutting part 654 of the limiting rotating body 65 engages with the fourth abutting part 673 of the lower limiting stop 67, so that the limiting rotating body 65 is blocked by the lower limiting stop 67 and will not continue to rotate.

[0150] Please see Figures 14 to 16 and cooperate Figure 8 After the roller blind 3 is installed, the consumer finds that the lower limit of the lower rail 42 of the roller blind 3 is not aligned with the window in the home. To change the lower limit of the lower rail 42, the lower rail 42 is pulled up by hand to the stop point C of the lower limit. Simply remove the fixing bracket 7 at the right end, so that the first convex shaft 612 is separated from the other through hole 724, and tilt the other end of the upper rail 4 with the limiting device 6 downward. Then the shaft housing 62 and the limiting rotating body 65 will be stuck in the upper rail 4 and will not rotate. When the consumer rotates the first convex shaft 612 counterclockwise by hand, the second convex stop 6322 of the shaft rod 632 will rotate and push the limiting elastic member 6. One end 681 of 8 simultaneously pushes the first side 6412 of the arc-shaped lever 641 and drives the arc-shaped lever 641 to rotate, so that the upper limit shaft 63, the stroke adjustment member 64, the upper limit stop body 66 and the lower limit stop body 67 provided inside the shaft housing 62 will rotate counterclockwise with the rotation of the lower limit shaft 61, so that the limiting rotating body 65 moves linearly towards the lower limit stop body 67 until the second abutment part 654 of the limiting rotating body 65 engages with the fourth abutment part 673 of the lower limit stop body 67 and stops. The lower limit stop body 67 causes the limiting rotating body 65 to drive the upper rail 4 to stop the lower rail 42 from descending.

[0151] Please see Figures 17 to 19 and cooperate Figure 13After the roller blind 3 is installed, the consumer finds that the upper limit of the lower rail 42 of the roller blind 3 is not aligned with the window in the home. If the upper limit of the lower rail 42 needs to be raised, the lower rail 42 is first lowered by hand to the stop point D of the upper limit. It is not necessary to remove the upper rail 4. The shaft housing 62 and the limiting rotating body 65 are stuck in the upper rail 4 and will not rotate. By inserting the adjustment tool 9 into the hexagonal hole 6311 of the second convex shaft 631, the upper limit shaft 63 is rotated clockwise. Then the first convex stop 6321 of the shaft 632 rotates and pushes the other end 682 of the limiting elastic member 68. At the same time, it pushes the second side 6413 of the arc-shaped lever 641 and drives the arc-shaped lever. Rotating 641 causes the first threaded portion 643 to rotate clockwise and move toward the second space 676, while the arc-shaped lever 641 moves toward the inner chamber 633 of the upper limit shaft 63. At the same time, the upper limit stop 66 rotates clockwise along with the first threaded portion 643 until the third stop 662 engages with the first stop 653 of the limiting rotating body 65 and stops. The upper limit stop 66 then causes the limiting rotating body 65 to stop the upper rail 4 from pulling the lower rail 42. Thus, by setting the limiting device 6 at the other end of the upper rail 4, this invention allows consumers to rotate the roller blind 3 by hand or adjust it with the adjustment tool 9 without disassembling the entire structure of the roller blind 3.

Claims

1. A roller blind, characterized in that, The roller blind contains The upper rail is provided with a limiting protrusion, and a groove is provided above the limiting protrusion; A roller blind device located at one end of the upper rail; A limiting device is located at the other end of the upper rail; Two fixed brackets are used for the roller blind device to be pivotally connected to the limiting device and for fixing to the upper sides of the window; A lower rail is positioned below the upper rail at intervals, and the surface of the lower rail is provided with a groove; and A curtain slat, with its two ends fixed to the upper rail and the lower rail respectively and wound around the surface of the upper rail, wherein one starting end of the curtain slat is engaged with the groove so that the curtain slat is driven by the upper rail to rise and fall, and one end of the curtain slat is placed into the groove for fixation; One end of the limiting device protrudes from the outer end of the upper rail, serving to be fixed to the fixed bracket on the right end, and also serving to adjust the lower limit and upper limit of the lower rail at the outer end of the fixed bracket on the right end. The roller shutter device includes a square-shaped fixing post at one end; the limiting device comprises a lower limiting shaft, a shaft housing, an upper limiting shaft, a stroke adjustment component, a limiting rotating body, an upper limiting stop, a lower limiting stop, and a limiting elastic component. The lower limiting shaft has a first convex shaft at one end of the fixing bracket extending to the right end. The first convex shaft is square and has a through hole communicating with the hollow interior of the lower limiting shaft. The lower limiting shaft has a top cover connected to the first convex shaft and multiple hooks protruding from the other end of the lower limiting shaft, each hook having a hook body. The shaft housing is fitted onto the outer surface of the lower limiting shaft and is coupled within the upper rail, and the shaft housing is subject to... The upper rail drives the lower limiting shaft to rotate on its outer surface. One end of the shaft housing has a recessed flange, and the other end extends into an inner shaft with a chamber. The chamber is for the lower limiting shaft to be inserted, with the top cover correspondingly positioned within the recessed flange. The first convex shaft rotates, driving the lower limiting shaft to rotate within the chamber. The outer end of the inner shaft is secured by hooks and fasteners, preventing the lower limiting shaft from disengaging. The shaft housing has at least one pair of first limiting grooves corresponding to the limiting protrusions of the upper rail. The upper limiting shaft is disposed within the hollow interior of the lower limiting shaft. The upper limiting shaft has a second convex shaft and a shaft rod. The second convex shaft is located at one end of the upper limiting shaft and is circular, allowing it to be inserted into the through hole of the first convex shaft. The shaft has a hexagonal hole and extends outward from the inside of the upper limit shaft to the other end of the upper limit shaft. The other end of the upper limit shaft has an annular groove, and an internal chamber is formed between the inside of the other end of the upper limit shaft and the shaft. The outer surface of the shaft has a first protrusion and a second protrusion. One end of the first protrusion and the second protrusion is connected to the annular groove of the upper limit shaft and does not exceed the outer diameter of the annular groove. One end of the stroke adjustment member is inserted into the internal chamber of the upper limit shaft and allows the shaft to rotate. The stroke adjustment member includes an arc-shaped lever, an annular protrusion connected to the arc-shaped lever, a first threaded portion connected to the annular protrusion and protruding in the opposite direction to the arc-shaped lever, and a first threaded portion connected to the first thread. The first fixing part of the part has an arc-shaped lever with a semi-circular groove. The outer surface of the shaft without the first and second protrusions is inserted into and rotated in the semi-circular groove. The arc-shaped lever has a first side and a second side on both sides. The outer surface of the first fixing part has a locking body. The limiting rotating body is movably screwed to the stroke adjustment member and connected to the upper rail. The limiting rotating body is driven by the upper rail and rotates along the stroke adjustment member. The limiting rotating body has a second threaded part and at least one second limiting groove corresponding to the limiting protrusion of the upper rail. The second threaded part is screwed to the first threaded part. The two sides of the limiting rotating body have a first abutment and a second abutment adjacent to the second limiting groove and staggered opposite each other.The upper limit stop is connected to the other end of the stroke adjuster and rotates synchronously with the stroke adjuster. The upper limit stop has a second fixing part and a third abutting part. The second fixing part engages with the first fixing part of the stroke adjuster, and the third abutting part correspondingly engages with the first abutting part of the upper limit stop. The lower limit stop is sleeved on the outer surface of the stroke adjuster to provide rotational movement for the stroke adjuster. The lower limit stop has a cylindrical body, a protruding part, and a fourth abutting part. The cylindrical body is sleeved on the outer surface of the stroke adjuster and has a receiving part extending from one end of the cylindrical body to... The other end includes a first space, a second space connected to the first space, a third space connected to the second space, and a third threaded portion on the inner surface of the third space. The first space is fitted into the annular groove of the upper limit shaft. The inner diameter of the first space is larger than the inner diameter of the second space. The first space and the second space are for the arc-shaped lever of the stroke adjustment member to be inserted. A first abutment edge is formed between the first space and the second space. The inner diameter of the second space is larger than the inner diameter of the third space. A second abutment edge is formed between the second space and the third space. The second abutment edge is for... The annular protrusion of the stroke adjuster abuts against the first threaded portion of the stroke adjuster, and the third threaded portion is movably screwed onto the first threaded portion of the stroke adjuster. The outer surface of one end of the cylinder has multiple grooves, and the protruding portion protrudes from the cylinder and adjacent to these grooves. The protruding portion has multiple slots corresponding to these grooves, which allow the hooks of the hook fasteners to be inserted into and engaged with the grooves, so that the lower limit stop is fixed to the lower limit shaft. The fourth abutting portion protrudes from the outer surface of the cylinder, with one end connected to the protruding portion and the other end extending out of the cylinder. At one end, the fourth abutment engages with the second abutment of the limiting rotating body; the limiting elastic member is located within the first space of the lower limiting stop, one end of the limiting elastic member abuts against the first abutment edge, and the other end of the limiting elastic member abuts against the other end of the upper limiting shaft. A first through-space and a second through-space are formed through the one end and the other end of the limiting elastic member. The first through-space allows the arc-shaped lever to pass through and rotate counterclockwise or clockwise, and the second through-space allows the first and second protrusions of the shaft to pass through and rotate counterclockwise or clockwise.

2. The roller blind according to claim 1, characterized in that, Each of the fixing brackets includes a fixing body and a vertical frame connected to the lower part of the fixing body. Each fixing body has a vertical member, and each vertical member has multiple fixing holes in the horizontal and vertical portions. Each vertical member is bent inward below the fixing holes in the vertical portion. Each vertical frame has a connecting portion connecting to the bottom end of the vertical portion of each vertical member, and a guide portion extending from the lower part of the connecting portion. Two grooves are respectively provided on both sides of each guide portion for temporary placement during the installation of the roller blind device. A square through hole is provided between the grooves of each guide portion for the fixing post and the first convex shaft of the lower limit shaft of the roller blind device to pass through and be positioned. Each through hole of each guide portion has a guide groove bent outward below it. One guide groove is used to guide the fixing post into one of the through holes for positioning, and the other guide groove is used to guide the first convex shaft into the other through hole for positioning.

3. The roller blind according to claim 2, characterized in that, Each of these fixed brackets also includes an outer sleeve, each of the outer sleeves is provided with a receiving groove and two locking blocks located on the upper sides of the receiving groove. The receiving grooves are for the upright bodies to be inserted into, and the locking blocks are used to fix the connecting parts.

4. The roller blind according to claim 1, characterized in that, There are three hook fasteners; wherein, the grooves of the cylinder and the slots of the protrusion are configured to correspond to the three hook fasteners.

5. The roller blind according to claim 1, characterized in that, The first, second, and third abutting parts are protrusions, and the fourth abutting part is a protruding strip.

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